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JP2017184223

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2017184223
Abstract: In a display device in which sound is generated by directly vibrating a display panel, the
sound traveling direction matches the image output direction, the localization feeling of sound is
improved, and the sound output characteristics are improved in a wide band. It is possible to
provide a display device which is easy to design the mechanism of the set device and which can
reduce the thickness of the display device or the set device. A display device is fixed to a display
panel on which an image is displayed and a support structure of the display panel (cover bottom
300, middle cabinet 500), and is arranged in contact with the display panel to directly vibrate the
display panel. And an acoustic generating actuator 200. [Selected figure] Figure 2b
Panel vibration type sound generation display device
[0001]
The present invention relates to a display device, and more particularly, to a display device in a
form in which a display panel is directly vibrated to generate sound.
[0002]
With the development of various portable electronic devices such as mobile communication
terminals and notebook computers, there is an increasing demand for flat panel display devices
applicable thereto.
The flat panel display device may be a liquid crystal display device (Liquid Crystal Display
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Device), a plasma display panel (Plasma Display Panel), a field emission display device (Field
Emission Display Device), a light emitting diode display device (Light Emitting Diode Display
Device), organic light emission. 2. Description of the Related Art A diode display device (Organic
Light Emitting Diode Display Device) has been studied.
[0003]
Among such display devices, a liquid crystal display (LCD) includes an array substrate including
thin film transistors, an upper substrate including a color filter and / or a black matrix, and a
liquid crystal material layer formed therebetween. The arrangement state of the liquid crystal
layer is adjusted by an electric field applied between both electrodes of the pixel area, whereby
the degree of transmission of light is adjusted to display an image.
[0004]
A display panel of such a liquid crystal display device is defined as a display area (active area:
AA) for providing an image to a user and a non-display area (non-active area: NA) which is a
peripheral area of the display area (AA). The display panel generally includes a first substrate
which is an array substrate on which thin film transistors and the like are formed to define pixel
regions, and a second substrate as an upper substrate on which a black matrix and / or a color
filter layer are formed. Are manufactured together.
[0005]
The array substrate or the first substrate on which the thin film transistor is formed also includes
a plurality of gate lines (GL) extending in a first direction and a plurality of data lines (DL)
extending in a second direction perpendicular to the first direction. One gate region (Pixel) P is
defined by each gate line and data line.
One or more thin film transistors are formed in one pixel region P, and the gate or source
electrode of each thin film transistor may be connected to a gate line and a data line,
respectively.
[0006]
Among such flat panel displays, the liquid crystal display itself is an element having no light
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emitting element, and thus a separate light source is required.
As a result, a backlight unit provided with a light source such as an LED is provided on the back
surface, and light is emitted toward the entire surface of the liquid crystal panel, and an
identifiable image can be realized for the first time.
[0007]
On the other hand, recently, organic light emitting display devices that are in the limelight as
display devices have high response speed, luminous efficiency, luminance, and viewing angle by
using organic light emitting diodes (OLED: Organic Light Emitting Diodes) that emit light by
themselves. Has the advantage of being large.
[0008]
Such an organic light emitting diode display arranges subpixels including organic light emitting
diodes in a matrix form, and controls the brightness of the subpixels selected by the scan signal
according to the gray level of data.
In addition, the organic light emitting diode display device is a self light emitting device, has low
power consumption, high response speed, high luminous efficiency, high luminance, and a wide
viewing angle.
[0009]
On the other hand, there is a set device of a finished product concept including such a display
device, and examples of such a set device may include a TV, a computer monitor, an
advertisement signboard, and the like.
[0010]
Such display devices or set devices include an acoustic output device such as a speaker for
generating and outputting an audio associated with the displayed image.
[0011]
Generally, a display device producing body such as a liquid crystal display or an organic light
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emitting diode display produces a display panel or a display only, and assembles the speaker into
a display completed by a separate industry producing a speaker. And a set device for outputting
video and sound.
[0012]
FIG. 1 is a schematic plan view of a speaker included in a conventional display device.
[0013]
As shown in FIG. 1, in the conventional display device 1 or set device, the speaker 2 is provided
on the rear surface or the lower end of the display panel.
[0014]
In this case, the traveling direction of the sound generated through the speaker 2 is in the
direction of the viewer who views the image in front of the display device 1 because the
advancing direction of the sound is the rear side not the front side of the display panel on which
the image is displayed There is a problem of obstructing the viewer's immersion because
[0015]
In addition, when the sound generated through the speaker 2 travels to the rear side of the
display panel or below the display panel, there is a problem that the sound quality is degraded
due to the interference with the sound reflected by the wall or the bottom.
[0016]
In addition, the speaker included in the conventional display device is such that the traveling
direction of the generated sound is directed to a direction other than the viewer of the display
device, so that not only the sense of localization of the sound is degraded due to the sound
diffraction phenomenon When configuring the set device, etc., since the speaker takes up a
certain space, there is also a problem that the design and the spatial arrangement of the set
device are limited.
[0017]
Therefore, there is an increasing need for a technique that improves the sound quality of the
sound output from the display device and does not disturb the viewer's immersion.
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[0018]
The present invention is intended to solve the above-mentioned conventional problems, and an
object of the present invention is to provide a display capable of generating a panel vibration
type sound which directly vibrates a display panel constituting a display device to generate
sound. It is in providing an apparatus.
[0019]
Another object of the present invention is to form a constant air gap between a display panel and
a sound generating actuator, and to provide a support structure for the display device, when
configuring a display including a panel vibration type sound generating device. It is an object of
the present invention to provide a display device which has excellent sound generation
performance and can be reduced in thickness.
[0020]
Still another object of the present invention is to provide an acoustic member including an
adhesive member (double-sided tape portion) adhered between the bottom surface of the display
panel and the upper surface of the support structure of the display and a sealing portion further
disposed in the outer shell of the adhesive member. An object of the present invention is to
provide a display device capable of improving the acoustic output characteristics by forming the
generation baffle portion.
[0021]
Still another object of the present invention is to provide a support structure disposed on the rear
surface of the display panel to prevent interference and noise between the source PCB (S-PCB)
for driving the display panel and the support structure. It is an object of the present invention to
provide a display device including one or more buffer members disposed between the source
PCB and the source PCB or between the rear surface of the display panel near the source PCB
and the inner surface of the support structure.
[0022]
Still another object of the present invention is to provide an acoustic generating actuator by
placing the acoustic generating actuator at a first position of the support structure of the display
device and placing the set PCB of the setting device at a second position different from the first
position. It is an object of the present invention to provide a display device capable of avoiding
the interference between the generating actuator and the set PCB.
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[0023]
Another object of the present invention is to follow the different vibrational characteristics of two
or more acoustically generating actuators by placing reinforcing members inside the support
structure of the display when two or more acoustically generating actuators are used. An object
of the present invention is to provide a display device capable of preventing deformation of a
support structure.
[0024]
In order to achieve the above object, the display device according to the present embodiment is
disposed to be in contact with a display panel for displaying an image and one side surface of the
display panel, and is an acoustic that vibrates the display panel to generate sound. The side
surface of the display panel with which the sound generating actuator contacts may be an inner
surface.
[0025]
The sound generation actuator may further be inserted into and fixed in a support hole formed in
the cover bottom such as a support structure such as a cover bottom for covering and supporting
at least the rear surface of the display panel.
[0026]
The sound generating actuator is disposed around the periphery of the lower plate inserted into
the support hole, the magnet disposed on the lower plate, the center pole disposed at the center
of the lower plate, and the center pole. The part may include a bobbin in contact with the display
panel and a coil wound around the bobbin.
[0027]
On the other hand, the lower plate constituting the sound generating actuator further includes an
outwardly extending extension, which can be fixed to the bottom surface of the cover bottom by
a bolt, a pem nut, an adhesive member or the like.
[0028]
An air gap space is formed between the display panel and the support member, and at the edge
of the air gap space, a baffle portion including an adhesive member and a sealing portion
disposed between the upper surface of the support member and the lower surface of the display
panel Can be included.
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[0029]
The support member includes a cover bottom for supporting the rear of the display panel, and a
middle cabinet for supporting the edge of the display panel, and the middle cabinet includes a
first area including the source PCB and a sound generating actuator. An area dividing member
may be included to divide the area.
[0030]
An indented step is formed on the upper surface of the cover bottom facing the source PCB
disposed on one side rear surface of the display panel, and a first buffer member spaced from the
bottom of the display panel by a predetermined distance is disposed on the indented step. it can.
[0031]
In the cover bottom, a second buffer member may be disposed in contact with the top surface of
the cover bottom and the bottom surface of the display panel while separating the first region
covering the source PCB and the second region covering the acoustic generation actuator.
[0032]
The sound generating actuators may be symmetrically disposed and include two or more
actuators having different vibration characteristics, and the cover bottom may further include a
reinforcing member passing adjacent positions of the two or more actuators.
[0033]
Hereinafter, according to an embodiment of the present invention to be described, it is possible
to separately provide a display device or a set device by providing a display device including a
panel vibration type sound generating device that directly vibrates a display panel to generate
sound. There is an effect that it is not necessary to arrange a speaker.
[0034]
In addition, since the sound traveling direction matches the image output direction, the sense of
localization of sound or the sound output characteristics can be improved, the mechanism design
of the set device becomes easy, and the thickness of the display device or set device There is an
effect that can be reduced.
[0035]
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In addition, a constant air gap is formed between the display panel and the sound generation
actuator, and the sound generation actuator is fixed to the support hole formed in the support
structure of the display device, thereby having excellent sound generation performance, and The
thickness of the display can be reduced.
[0036]
Further, by forming a baffle portion including an adhesive member (double-sided tape portion)
adhered between the bottom surface of the display panel and the upper surface of the support
structure of the display device and a sealing portion further disposed on the outer shell of the
adhesive member Sound output characteristics can be improved.
[0037]
Also, one between the support structure disposed on the rear surface of the display panel to fix /
support the acoustic generation actuator and the source PCB of the display panel, or between the
rear surface of the display panel near the source PCB and the inner surface of the support
structure By arranging the above buffer members, interference and noise between the source
PCB (S-PCB) for driving the display panel and the support structure of the display device can be
prevented.
[0038]
Also, by arranging the sound generation actuator and the set PCB of the set device in different
positions, it is possible to avoid the interference between the sound generation actuator and the
set PCB and improve the acoustic characteristics.
[0039]
Also, if more than one acoustic generating actuator is used, deformation or support of the
supporting structure according to the different vibrational characteristics of the two or more
acoustic generating actuators by disposing a reinforcement member inside the supporting
structure of the display device There is an effect that the acoustic distortion due to the vibration
of the structure can be prevented.
[0040]
It is a schematic top view with respect to the speaker contained in the conventional display
apparatus.
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FIG. 2A is a plan view, and FIG. 2B is a cross-sectional view of a display device including a panel
vibration type sound generation device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of two types of acoustical actuators used in embodiments of the
present invention.
FIG. 6 illustrates a state in which a sound generation actuator according to an embodiment of the
present invention vibrates a display panel to generate sound.
5 illustrates an example of a coupling state of an acoustic generation actuator according to an
embodiment of the present invention and a cover bottom that is a support structure of a display
device.
Figure 6 illustrates another embodiment for the coupling structure of the sound generating
actuator and the cover bottom.
A baffle portion formed between the display panel and a middle cabinet, which is one of the
support structures of the display panel, to form an acoustic transmission air gap between the
display panel as the diaphragm and the cover bottom. An example is illustrated.
FIG. 6 illustrates another embodiment of the baffle portion, in which the adhesive member and
the sealing portion are directly seated on the cover bottom.
5 illustrates the positional relationship between a display panel drive source PCB and a set device
drive set PCB, which are disposed on the rear surface of the display device.
FIG. 7 illustrates an embodiment further including a region dividing member additionally formed
in the middle cabinet and a cable through hole for passing a connection cable (FFC) formed in the
cover bottom.
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It is a figure for demonstrating the arrangement | positioning relationship between the display
panel drive source PCB and the cover bottom, and the noise generation | occurrence | production
problem by it.
FIG. 12 illustrates an embodiment including buffer members that can prevent interference and
stuttering between the source PCB and the cover bottom according to FIG.
It is a graph which shows the masticatory sound reduction effect at the time of using the buffer
member which concerns on embodiment of FIG.
FIG. 5 is a view showing an arrangement relationship between a sound generation actuator and a
set PCB in a display device according to an embodiment of the present invention.
It is a figure for showing the twist phenomenon of the cover bottom which can be generated by
the case where the display is symmetrically provided with two or more actuators, and the
difference in the amount of vibration in that case.
FIG. 16 illustrates a structure in which a reinforcing member is disposed on the inside of the
cover bottom to prevent acoustic distortion due to twisting of the cover bottom or vibration of
the cover bottom according to FIG.
The concrete arrangement of a reinforcement member of a cover bottom is illustrated.
Figure 7 illustrates an embodiment further including an acoustic compensation member
positioned to maintain acoustic output characteristics when the acoustic generating actuator is
moved up and down for design reasons.
It is a graph which shows the sound output characteristic in case the panel vibration type sound
generator by this embodiment is used contrasted with the existing common speaker.
[0041]
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Hereinafter, some embodiments of the present invention will be described in detail through
exemplary drawings.
In adding reference symbols to components in each drawing, the same components can have the
same reference numerals as much as possible, even if they are displayed on other drawings.
Further, in the description of the present invention, when it is determined that the detailed
description for the related known configurations or functions may obscure the gist of the present
invention, the detailed description will be omitted.
[0042]
Further, in describing the components of the present invention, terms such as first, second, A, B,
(a), (b) can be used.
Such terms are used to distinguish the component from the other components, and the term is
not intended to limit the nature, order, procedure, number, etc. of the components.
Where a component is described as "connected", "coupled" or "connected" to another component,
the other component can be directly connected or connected to the other component, It should
be understood that other components may be interposed between each component or each
component may be "connected", "coupled" or "connected" through other components. .
[0043]
FIG. 2 is a schematic view of a display device including the panel vibration type acoustic
generator according to the present embodiment, FIG. 2A is a plan view, and FIG. 2B is a crosssectional view.
[0044]
As shown in FIG. 2, the display device according to the present embodiment includes a display
panel 100 for displaying an image, and an acoustic generating actuator 200 for vibrating the
display panel to generate sound by contacting the one surface of the display panel. Configured
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[0045]
As described in more detail in FIG. 4 and the like, the sound generating actuator 200 surrounds
the magnet, a plate for supporting the magnet, a center pole projecting from the central region of
the plate, and the periphery of the center pole. And a coil on which a coil for applying a current
for sound generation is wound is disposed, and a tip end of the bobbin is arranged to be in
contact with one surface of the display panel.
[0046]
Also, as shown in FIG. 2B, the display device can include a support structure that supports one or
more of the back surface or the side surface of the display panel, and the plate of the sound
generating actuator is fixed to the support structure.
[0047]
The support structure includes a cover bottom 300 disposed on the rear surface of the display
panel, and further includes a middle cabinet 500 coupled to the cover bottom surrounding the
side of the display panel and receiving and supporting one side edge of the display panel. be able
to.
[0048]
The cover bottom that constitutes the support structure may be a plate member made of a metal
or a plastic material that extends over the entire rear surface of the display device.
[0049]
On the other hand, the cover bottom 300 in the present specification is not limited to the term,
and plate bottom, back cover, base frame, metal frame, metal frame, metal A support that can be
used in other representations such as chassis (Metal Chassis), chassis base, m-chassis, etc. and
supports the display panel, all located at the rear base of the display device It should be
understood as a concept including a frame or plate-like structure in the form of
[0050]
As used herein, the term “display device” is a narrow definition such as a liquid crystal module
(LCM) including a display panel and a drive unit for driving the display panel, an organic light
emitting display module (OLED module), and the like. Display devices as well as set electronic
devices such as notebook computers, TVs, computer monitors, smart phones, or mobile
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electronic devices such as electronic pads, or even set devices that are finished products
including such LCMs, OLED modules etc. Use as an included concept.
[0051]
That is, the display device in the present specification is used to include display devices in the
narrow sense such as LCM and OLED module as well as set devices which are application
products including them.
[0052]
However, in some cases, an LCM composed of a display panel and its drive unit, an OLED module
will be expressed as a "display device" in a narrow sense, and a complete set of electronic devices
including such LCM, OLED modules It can also be expressed separately as “device”.
For example, a display device in a narrow sense includes a liquid crystal (LCD) or organic light
emitting (OLED) display panel and a source PCB which is a control unit for driving the same, and
a set device is electrically connected to the source PCB to set the set device. It may be a concept
further including a set PCB which is a set control unit that controls the whole.
[0053]
The display panel 100 used in the present embodiment is a liquid crystal display panel, an
organic light emitting diode (OLED) display panel, and a plasma display panel (PDP) that all types
of display panels are used. It is not limited to a specific display panel as long as sound waves can
be generated by direct vibration by the sound generation actuator 200.
[0054]
More specifically, when the display panel is a liquid crystal display panel, pixels defined in
multiple gate lines and data lines and their intersections, and switching elements for adjusting
light transmittance in each pixel And an upper substrate including a color filter and / or a black
matrix, and a liquid crystal material layer formed therebetween.
[0055]
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Also, in the case where the display panel is an organic electroluminescent (OLED) display panel,
in order to selectively apply a voltage to each of the pixels defined in multiple gate lines, data
lines and their intersections, and to each pixel And an encapsulation substrate disposed on the
array substrate so as to cover the organic luminescence element (OLED) layer on the array
substrate and the organic luminescence element layer, and an encapsulation substrate (Encap.
) Can be configured to include a substrate and the like.
The sealing substrate protects the thin film transistor, the organic light emitting element layer,
and the like from external impact, and prevents moisture from entering the organic light emitting
element layer.
[0056]
The form of the display panel used in the display device according to the present embodiment is
not limited, but the display panel of the organic electroluminescent display panel is more
preferable for the following reasons.
[0057]
Specifically, in the case of a liquid crystal display panel, a back light of an indirect light source
system in which a large number of layers are stacked and a separate light source is disposed has
to be provided. The directionality of the material may sway, which may cause distortion of the
image.
[0058]
On the other hand, the organic light emitting element of the organic light emitting (OLED) display
panel corresponds to a self light emitting element and does not need a separate light source, and
a polarization layer (POL), a glass layer, an encapsulation layer (Encap.
And so on), distortion of the image does not occur because the light emission characteristics of
the organic light emitting layer are hardly affected even when directly vibrated by the sound
generating actuator 200.
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Therefore, it is more preferable to use the organic light emitting display panel in the present
embodiment.
[0059]
Meanwhile, since the display panel used in the display device according to the present
embodiment has a general structure, more detailed description of the display panel will be
omitted.
[0060]
In addition, the display device according to the present embodiment is a baffle portion for
forming an air gap space, which is a space disposed between the cover bottom 300 or the middle
cabinet 500, which is a support structure, and the display panel to transmit generated sound
waves. It can further include 400.
[0061]
That is, by sealingly coupling the display panel to the cover bottom at the edge of the air gap
space, the air gap space can be defined as a four-sided sealed area, and such a sealed air gap
space is a baffle structure It can be expressed as
[0062]
The baffle portion 400 is disposed at the edge of the cover bottom or middle cabinet and is
provided with an adhesive portion 412 adhered to the bottom surface of the display panel, and
the outer portion of the adhesive portion to further provide the sealing property of the air gap
600. A sealing portion 414 can be included.
[0063]
At this time, the adhesive portion 412 is a double-sided tape (Double-side Tape), and it is
preferable to make the height of the sealing portion 414 larger than the height of the adhesive
portion 412, as described in more detail in FIG.
[0064]
FIG. 3 is a cross-sectional view of two types of acoustic generating actuators used in
embodiments of the present invention.
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[0065]
The sound generating actuator 200 used in the present embodiment includes a magnet 220
which is a permanent magnet, a plate 210 supporting the magnet, a center pole 230 projecting
in a central region of the plate, and a periphery of the center pole 230. And a coil 260 wound
around an outer shell of the bobbin and to which a current for generating a sound is applied.
[0066]
Meanwhile, the sound generating actuator used in the present embodiment may include both a
first structure in which the magnet is disposed outside the coil and a second structure in which
the magnet is disposed inside the coil.
[0067]
FIG. 3A shows a first structure in which the magnet is disposed outside the coil, which can be
expressed as a dynamic type or an external magnet type.
[0068]
The lower plate 210 is fixed to the support hole 310 formed in the cover bottom 300, and the
magnet 220 which is an annular permanent magnet is disposed on the outer periphery of the
lower plate.
[0069]
A top plate 210 'is disposed at an upper portion of the magnet 220, and an outer frame 240 is
formed at an outer portion of the top plate to be protruded from the top plate.
[0070]
On the other hand, a center pole 230 is disposed to protrude in a central region of the lower
plate 210, and a bobbin 250 surrounding the center pole 230 is disposed.
[0071]
A coil 260 is wound around the lower side of the bobbin 250, and an acoustic current is applied
to the coil.
[0072]
Meanwhile, a damper 270 may be disposed between a portion of the upper side of the bobbin
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and the outer frame 240.
[0073]
The lower plate 210 and the upper plate 210 ′ are configured to fix the sound generation
actuator 200 to the cover bottom 300 while supporting the magnet 220, and the lower plate 210
is provided in a circular shape as shown in FIG. 3A. A ring-shaped magnet 220 is provided on the
plate 210, and a top plate 210 is provided on the magnet.
[0074]
The lower plate 210 and the upper plate 210 may be coupled to the cover bottom 300 to fix and
support the magnet 220 positioned between the lower plate 210 and the upper plate 210 '.
[0075]
The plate can be made of a magnetic material such as iron (Fe).
The plate is not limited to that term and can be expressed in other terms, such as a yoke.
[0076]
On the other hand, the center pole 230 and the lower plate 210 can be integrally formed.
[0077]
The bobbin 250 is an annular structure formed of paper, an aluminum sheet, or the like, and the
coil 260 is wound around a certain area under the bobbin.
Such a bobbin and a coil can be combined and expressed as a voice coil.
[0078]
When a current is applied to the coil, a magnetic field is formed around the coil, and the external
magnetic field formed by the magnet 220 moves the entire bobbin upward while being guided by
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the center pole according to Fleming's law.
[0079]
On the other hand, since the tip end of the bobbin 250 is in contact with the rear surface of the
display panel 100, the display panel is vibrated by the current application and non-application
states, and such a vibration generates a sound wave.
[0080]
The magnet 220 may be a sintered magnet such as barium ferrite, and the material is ferric oxide
(Fe2O3), barium carbonate (BaCO3), strontium ferrite with improved magnetic component,
aluminum (Al), nickel (Ni) For example, alloy cast magnets of cobalt (Co) can be used, but not
limited thereto.
[0081]
On the other hand, a damper 270 is disposed between a part of the upper side of the bobbin 250
and the outer frame 240, and the damper 220 is provided in a bellows structure to vertically
vibrate the bobbin while contracting and relaxing by vertical movement of the bobbin. Adjust.
That is, since the damper 270 is connected to the bobbin 250 and the outer frame 240, the
vertical vibration of the bobbin is limited by the restoring force of the damper 270. Specifically,
the bobbin 270 vibrates at a certain height or more, or When vibrating below a certain height,
the restoring force of the damper 270 allows the bobbin to return to the original position.
[0082]
Such dampers can be expressed in other terms, such as edges.
[0083]
On the other hand, FIG. 3B shows a first structure in which the magnet is disposed inside the coil,
which can be expressed as a micro type or an internal magnet type.
[0084]
The lower plate 210 is fixed to the support hole 310 formed in the cover bottom 300, the
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magnet 220 is disposed in the central region of the lower plate, and the center pole is extended
at the upper portion of the magnet. It is formed.
[0085]
The upper plate 210 'is protruded around the outer periphery of the lower plate, and the outer
frame 240 is disposed outside the upper plate.
[0086]
The bobbin 250 is disposed to surround the magnet 220 and the center pole 230, and the coil
260 is wound around the bobbin.
[0087]
Also, a damper 270 is disposed between the outer frame 240 and the bobbin.
In the present specification, the bottom plate 210 of the sound-generating actuator can also be
used simply as a plate.
[0088]
Such a second type of acoustic generation actuator has a smaller leakage flux and a smaller
overall size compared to the first type in which the magnet is disposed outside, but the magnetic
flux reduction phenomenon due to a large current input There is a feature that it may occur and
it is difficult to manufacture.
[0089]
In the present embodiment, all actuators according to the first method or the second method can
be used, and for the sake of convenience, the structure according to the first method will be
described below as a representative.
[0090]
In addition, the sound generation actuator used in the display device according to the present
embodiment is not limited to the form illustrated in FIG. 3, and other types can be used as long as
the display panel can be vertically vibrated by current application to generate sound. Actuators
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may be used.
[0091]
FIG. 4 illustrates a state in which a sound generation actuator according to an embodiment of the
present invention vibrates a display panel to generate sound.
[0092]
In FIG. 4A, a current is applied, and the center pole connected to the lower surface of the magnet
becomes an N pole, the upper plate connected to the upper surface of the magnet becomes an S
pole, and an external magnetic field is generated between the coils. It is formed.
[0093]
If a current for acoustic generation is applied to the coil in this state, an applied magnetic field is
generated around the coil, but a force is generated to move the bobbin upward due to the applied
magnetic field and the external magnetic field.
[0094]
Therefore, as shown in FIG. 4A, the bobbin moves upward, and the display panel in contact with
the tip of the bobbin vibrates upward.
[0095]
In this state, if the current application is stopped or a current in the opposite direction is applied,
a force is generated to move the bobbin downward according to the similar principle as shown in
FIG. 4B, and thus the display panel is lowered. Swing to the side.
[0096]
As described above, the display panel vibrates up and down depending on the direction of
current application to the coil and the size, and such a vibration generates a sound wave.
[0097]
FIG. 5 illustrates an example of a coupled state of an acoustic generation actuator according to an
embodiment of the present invention and a cover bottom which is a support structure of a
display device.
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[0098]
FIG. 6 illustrates another embodiment for the coupling structure of the sound generating
actuator and the cover bottom.
[0099]
The sound generation actuator 200 according to the present embodiment can be supported
through a support hole formed on a cover bottom or back cover which is a support structure of a
display device, and FIGS. 5 to 6 illustrate various support structures. Do.
[0100]
In the support structure of FIG. 5, a support hole 310 is formed through the cover bottom 300,
and one or more of the lower plate 210, the magnet 220 and the upper plate 210 'of the sound
generating actuator 200 are accommodated inside the support hole. To be inserted.
[0101]
The bottom surface of the lower plate 210 is further formed with an extension 212 which is
formed to extend to the outside of the lower plate, and such an extension 212 is fixed to the
bottom surface of the cover bottom 310 to cover the sound generating actuator 200. Can be
attached to
[0102]
In this manner, by fixing the sound generation actuator 200 in a form inserted into the support
hole formed in the cover bottom, the distance between the display panel and the cover bottom
can be reduced, so the thickness of the display device can be reduced. There is an effect that can
be reduced.
[0103]
That is, although an air gap, which is a space in which the display panel can vibrate, must exist
between the display panel and the cover bottom, the sound generating actuator is inserted / fixed
in the support hole of the cover bottom. According to this structure, the height of the sound
generating actuator disposed between the rear surface of the display panel and the inner surface
of the cover bottom can be reduced, so that the air gap can be minimized.
[0104]
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21
FIG. 5 shows a screw hole formed on the rear surface of the cover bottom for fixing the sound
generating actuator to the cover bottom, and a bolt 320 or a screw to the screw hole of the cover
bottom through a through hole formed in the extension 212 of the lower plate. It is a method of
fastening and fixing.
[0105]
On the other hand, FIG. 6A is not a simple screw connection, and a pem nut (Pem Nut) 330 or a
self clinching nut (self) capable of securing a certain distance between the cover bottom 300 and
the lower plate extension 212. After the clinching nut is placed, it is fixed by a bolt 320.
[0106]
As shown in FIG. 6B, using a Pem Nut 330 or a self clinching nut secures a certain space between
the acoustic generating actuator and the cover bottom, so that the actuator vibrates. There is an
advantage that it can be minimized to be transmitted to the cover bottom.
[0107]
Also, in FIG. 6C, an adhesive member such as a double sided tape is disposed between the
extension 212 of the lower plate of the actuator and the cover bottom, and adhesively fixed.
[0108]
As shown in FIG. 6C, when the adhesive member is used, the adhesive member acts as a kind of
damper if the elasticity and thickness of the adhesive member are properly adjusted, so that the
vibration of the actuator is transmitted to the cover bottom. There is an advantage that can be
minimized.
[0109]
As shown in FIG. 5 and FIG. 6, by adopting a method of inserting and fixing the sound generating
actuator 200 for directly vibrating the display panel in contact with the display panel into the
support hole formed in the cover bottom, the actuator It is possible to reduce the thickness of the
display as compared to the case of being completely housed inside.
[0110]
FIG. 7 shows a baffle formed between the display panel and the middle cabinet which is one of
the support structures of the display panel to form an air gap between the display panel as the
diaphragm and the cover bottom. An example of a part is illustrated.
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[0111]
As shown in FIG. 7A, in the panel vibration type acoustic generator according to the present
embodiment, the space between the display panel 100 and the support structure (such as the
cover bottom 300) is a space where the acoustic generation actuator 200 can vibrate the panel.
An air gap 600 must be secured.
[0112]
In addition, when the display panel vibrates, one side of the display panel must be joined to the
support structure of the display panel so that sound waves can be generated, and in particular,
the generated sound is leaked to the outside through the side of the display device or the like. It
does not.
[0113]
For this purpose, the display device according to the present embodiment forms a baffle 400
between the lower surface of the display panel and the support structure.
[0114]
More specifically, a fixed section (ie, an air gap space) around the sound generating actuator is
defined, and the edge of the section has a baffle portion between the lower surface of the display
panel and the upper surface of the middle cabinet or cover bottom. The baffle portion 400 is
disposed, the adhesive member 412 such as double-sided tape adhered between the bottom
surface of the display panel and the upper surface of the support structure of the display device,
and the sealing portion 414 further disposed on the outer surface of the adhesive member. It is
preferable to comprise.
[0115]
At this time, the section in which the baffle portion is formed may be the entire display panel
area defined as four sides of the outer periphery of the display panel, but it is not limited thereto,
and the source PCB is disposed as described later It can be defined as an area excluding the area
to be
[0116]
Also, if two or more sound generating actuators are provided to implement stereo, stereophonic
sound, etc., the section in which the baffle portion is formed may be divided into two or more.
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[0117]
As shown in FIG. 7, in addition to the cover bottom 300 covering the entire rear surface of the
display panel, the support structure of the display device is coupled to the cover bottom and
further includes a middle cabinet 500 for seating a part of the display panel. Can be included.
[0118]
The middle cabinet 500 is a frame-shaped member formed along the outer contour of the display
panel, and is formed by bending the horizontal support portion 502 on which a part of the
display panel is seated, and both sides from the horizontal support portion. It may have a
generally T-shaped cross-section including vertical supports 504 that cover the sides of the cover
bottom and the sides of the display panel.
[0119]
Such a middle cabinet 500 constitutes the side appearance of the display or setting device and
may not be used in some cases or be integral with the cover bottom.
[0120]
According to the embodiment of FIG. 7, the adhesive member 412 constituting the baffle portion
400 is a double-sided tape disposed between the upper surface of the horizontal support portion
of the middle cabinet 500 and the display panel, and the lower surface of the display panel is
middle It functions to bond and fix to the cabinet.
[0121]
In addition, it is preferable that the sealing part 414 which constitutes the baffle part is further
disposed at the outer shell of the adhesive member and has a thickness or height larger than the
thickness or height of the adhesive member.
[0122]
The sealing portion 414 may be made of a highly elastic material such as rubber, and has a
thickness t2 larger than the thickness t1 of the bonding member 412 as shown in FIG. 7B.
[0123]
That is, as shown in FIG. 7B, one surface of the adhesive member 412, which is a double-sided
11-05-2019
24
tape having a thickness t1, is adhesively disposed on the inside portion of the upper surface of
the horizontal support portion 502 of the middle cabinet 500, and the outer shell of the adhesive
member is larger than t1. A sealing portion 414 of elastic material having a thickness is disposed.
[0124]
In this state, if the display panel 100 is attached to the other adhesive surface of the adhesive
member 412, the display panel and the middle cabinet are adhered while the sealing portion 414
having a larger thickness is pressed to a certain extent.
(FIG. 7C)
[0125]
Therefore, the encapsulation of the air gap area around the sound generating actuator can be
further improved.
[0126]
As shown in FIG. 7C, the display panel generates a sound by connecting the display panel 100
and the cover bottom 300 while forming the air gap 600 of only the thickness of the horizontal
support portion 502 of the middle cabinet and the bonding member 412. While being able to
secure the vibration space which can be made to do, it can prevent that the sound wave
generated inside flows out outside along the side of a display.
[0127]
In particular, by making the baffle portion 400 disposed at the edge of the air gap space into a
double structure of the adhesive member 412 and the sealing portion 414 and forming a larger
thickness of the sealing portion, the air gap space is enclosed. There is an effect that it is possible
to further improve and block the outflow of sound.
[0128]
The middle cabinet 500 herein can be replaced with other representations such as a guide panel,
a plastic chassis, a p-chassis, a support main, a main support, a mold frame, etc., and there are a
number of folds It should be understood as a square frame-shaped structure having a cross-
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25
sectional shape, including all forms of members connected to the cover bottom and used to
support the display panel and the baffle portion.
[0129]
The middle cabinet 500 may be made of a synthetic resin mold material such as polycarbonate
and may be manufactured by an injection molding method, but is not limited thereto.
[0130]
FIG. 8 shows another embodiment of the baffle portion, in which the bonding member and the
sealing portion are directly seated on the cover bottom.
[0131]
As mentioned above, although a middle cabinet can be used to support between the cover bottom
and the display panel, such middle cabinet is not necessarily a necessary structure.
[0132]
The embodiment of FIG. 8 corresponds to the case where the cover bottom 300 is formed to
support one side of the display panel while forming the appearance of the side of the display
without the middle cabinet.
[0133]
That is, in the embodiment of FIG. 8, the cover bottom 300 is provided with the step portion 360
projecting upward from the base surface on one side and the side support portion 362 extending
in the vertical direction from the outside of the step portion 360. Three hundred are provided.
[0134]
A part of the edge of the display panel 100 is seated and joined to the step portion 360 of the
cover bottom 300, and the side support portion 362 of the cover bottom surrounds and protects
the side surface of the display panel 100, resulting in the cover The bottom forms the overall
appearance of the side and back of the display.
[0135]
The adhesive member 412 in the form of a double-sided tape is disposed on the inner side of the
step portion 360 of the cover bottom and has a thickness greater than that of the adhesive
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member in order to configure the baffle portion 400 for sound generation and the like with such
a structure. A sealing portion 414 is disposed outside the adhesive member.
[0136]
In this state, the display panel 100 is seated on the step portion 360 of the cover bottom and
bonded to one surface of the adhesive member 412 to be coupled to the cover bottom, and at
this time the air for sound transmission while the sealing portion 414 is crimped. Enclosing the
gap space is secured.
[0137]
By using the embodiment of FIG. 8, the structure is simplified as the middle support structure
such as the middle cabinet is eliminated, and the baffle portion 400 disposed at the edge of the
air gap space is formed by two members, the adhesive member 412 and the sealing portion 414.
By forming a double structure and making the thickness of the sealing portion larger, it is
possible to secure a vibration space in which the display panel can generate an acoustic sound,
and a sound wave generated internally is along the side of the display device. Can have the effect
of preventing outflow to the outside.
[0138]
In the present embodiment, the thickness of the air gap space, that is, the distance (G) between
the display panel and the cover bottom in the air gap space can be set to about 1.0 to 3.0 mm,
but is limited thereto. It can be determined in another range depending on the degree of
vibration of the display panel.
[0139]
However, since there is a need to reduce the thickness of the display device, the thickness of the
air gap space (G In the present embodiment, it was confirmed that the thickness (G) of the air gap
space is approximately 2.0 mm in the present embodiment.
[0140]
FIG. 9 illustrates the positional relationship between the display panel drive source PCB and the
set device drive set PCB disposed on the rear surface of the display device.
[0141]
As shown in FIG. 9, the display device includes a source PCB which is a circuit board including a
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source driver integrated circuit (S-DIC) for driving a display panel to drive data lines formed on
the display panel. Abbreviated as S-PCB.
[0142]
In addition, a display device or a set device including the same is connected to the S-PCB, and a
control printed circuit board for implementing control of the display device or the set device by
mounting control parts and the like and various electric devices. (C-PCB: Control Printed Circuit
Board) can further be included.
[0143]
More specifically, the organic light emitting display device to which the present embodiment can
be applied is an organic light emitting display panel in which a large number of data lines (DL)
and a large number of gate lines are arranged and a large number of sub pixels (SP: Sub Pixels)
are arranged. 100, a data driver for driving a plurality of data lines (DL), a gate driver for driving
a plurality of gate lines (GL), and a controller for controlling the data driver and the gate driver.
[0144]
The controller supplies various control signals to the data driver and the gate driver to control
the data driver and the gate driver, starts scanning at the timing embodied in each frame, starts
the input video data input from the outside with the data driver Convert to fit the data signal
format to be used, output the converted video data, and control data driving at an appropriate
time according to the scan.
[0145]
Such a controller may be a timing controller used in conventional display technology, or a
controller including a timing controller that also performs other control functions.
[0146]
The data driver drives the multiple data lines (DL) by supplying data voltages to the multiple data
lines (DL).
ここで、データドライバーは‘ソースドライバー’ともいう。
11-05-2019
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[0147]
Such a data driver can drive multiple data lines including at least one Source Driver Integrated
Circuit (S-DIC).
[0148]
The gate driver sequentially drives the multiple gate lines (GL) by sequentially supplying scan
signals to the multiple gate lines (GL).
Here, the gate driver may also be referred to as a 'scan driver', and such a gate driver may
include at least one gate driver integrated circuit (G-DIC).
[0149]
Meanwhile, each source driver integrated circuit (S-DIC) is a bonding pad (Bonding Pad) of an
organic light emitting display panel by a tape automated bonding (TAB) method or a chip on
glass (COG) method. Or may be disposed directly on the organic light emitting display panel, and
in some cases, may be integrated and disposed on the organic light emitting display panel.
In addition, each source driver integrated circuit (S-DIC) may be embodied by a chip on film
(COF) method mounted on a film connected to an organic light emitting display panel.
[0150]
That is, the display device to which the present embodiment can be applied is at least one source
printed circuit board (S-PCB: source printed circuit board) necessary for circuit connection to at
least one source driver integrated circuit (S-DIC). And a control printed circuit board (C-PCB:
Control Printed Circuit Board) for mounting various electric devices, or a set PCB.
[0151]
In this case, at least one source driver integrated circuit (S-DIC) is mounted on at least one source
PCB (S-PCB), or at least one source driver integrated circuit (S-DIC) is mounted on Chip-on-film
(COF) can be connected.
11-05-2019
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[0152]
In addition, the control printed circuit board (C-PCB) or set PCB 800 supplies various voltages or
currents to a controller that controls operations such as a data driver and a gate driver, a display
panel, a data driver, a gate driver, and the like. A power controller (Power Management IC; PMIC)
may be included to control or control various voltages or currents to be supplied.
[0153]
At this time, the source PCB is generally located at one of the upper side and the lower side of the
display panel, but both of the upper side and the lower side of the organic light emitting display
panel 110 are selected depending on the driving method and panel design method. It can also be
located.
[0154]
That is, as shown in FIG. 9, the source PCB 700 is connected to the display panel 100 and the
chip on film (COF) 710 and disposed on the lower rear surface of the display panel.
[0155]
On the other hand, a control printed circuit board (C-PCB) or set printed circuit board 800 is
disposed behind the outside of the cover bottom 300 and is connected to the source PCB 700
inside the cover bottom via a flexible cable (FFC) or the like. it can.
[0156]
According to such a structure as shown in FIG. 9, it becomes difficult to form the baffle portion as
described in FIG. 7 on the lower side of the display panel to which the sound generation actuator
200 is attached.
[0157]
That is, as shown in FIG. 9B, since the source PCB 700 and the chip-on-film 710 connected
thereto are disposed near the lower side of the display panel, a baffle portion such as the
adhesive member 412 and the sealing portion 414 is present near it. It is difficult to arrange the
400, and even if the baffle portion is arranged, the encapsulation of the air gap space may be
reduced.
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[0158]
In addition, in order to pass a flexible cable for connecting between the source PCB 700 disposed
inside the cover bottom and the set PCB 800 disposed outside the cover bottom, the lower
portion of the cover bottom is a cable Although the through holes are formed, the generated
sound may leak backward through such cable through holes.
[0159]
Therefore, in order to apply the sound generation device according to the present embodiment to
the display device having a structure as shown in FIG. 9, it is necessary to solve the problem of
the decrease in the sealing property of the baffle portion and the sound leakage. And the
embodiment according to FIG. 10 is presented.
[0160]
FIG. 10 illustrates an embodiment further including an area dividing member additionally formed
in the middle cabinet and a cable through hole for passing a connecting cable (FFC) formed in the
cover bottom.
[0161]
In the embodiment of FIG. 10, in order to eliminate the problems of the structure described in
connection with FIG. 9, the embodiment further includes an area dividing member 510 which
divides the middle cabinet into two or more areas, and on the area dividing member. The
structure which forms a baffle part is illustrated.
[0162]
The area dividing member 510 is for dividing the entire area of the middle cabinet surrounding
the entire display panel into a first area (A) including the source PCB and a second area (B) not
including the source PCB. The sound generation actuator 200 is disposed in a part of the second
area (B).
[0163]
Such area dividing members may be manufactured in the form of a bar having a thickness
corresponding to the horizontal support of the middle cabinet and attached to the middle cabinet
500 by welding or the like, but the invention is not limited thereto. Instead, the entire middle
cabinet including the area dividing member 510 can be integrally manufactured in one unit.
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[0164]
As shown in FIG. 10A, the area dividing member 510 is disposed long in the horizontal direction
of the display device, and the adhesive is a baffle portion on the three sides of the middle cabinet
corresponding to the second area (B) and the upper part of the area dividing member 510. A
member 412 and a sealing portion 414 are disposed.
[0165]
FIG. 10B is a cross-sectional view taken along the line I-I 'of FIG. 10A, in which the second region
(B) is made into an air gap space by arranging the adhesive member 412 and the sealing portion
414 on the area dividing member 510 of the middle cabinet. Let it be sealed.
[0166]
In addition, the source PCB 700 and the set PCB 800 are connected to a first partial area (A)
including the source PCB in the lower partial area of the cover bottom 300, more specifically, the
area divided by the area dividing member 510. A cable through hole 370 for passing the
connecting cable 810 is formed.
[0167]
As shown in FIG. 10, by forming only the second area (B) without the source PCB as the sound
generation area using the area dividing member 510, the phenomenon of reducing the
encapsulation of the sound generation area due to the interference of the source PCB is
minimized. There are effects that can be done.
[0168]
Also, by disposing the cable through hole 370 in the first region (A) where the source PCB is
present, it is possible to prevent an acoustic leakage phenomenon due to the cable through hole.
[0169]
FIG. 11 is a diagram for explaining the arrangement relationship between the display panel drive
source PCB and the cover bottom, and the problem of the generation of stuttering thereby.
[0170]
As shown in FIG. 11A, a source PCB 700 including a source driver integrated circuit (S-DIC) or a
data driver is connected to the display panel through a chip on film or the like, and is disposed
behind one side (lower side) of the display panel. .
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[0171]
Therefore, there is a gap g between the source PCB and the cover bottom in the region where the
source PCB is disposed, which is smaller than the gap between the display panel 100 and the
cover bottom 300 in the other region.
[0172]
Therefore, when the sound generation actuator 200 according to the present embodiment is
disposed to vibrate the display panel, the source PCB vibrated integrally with the display panel
may collide with the cover bottom in the area where the source PCB is disposed.
[0173]
Not only are stuttering caused by such a collision between the source PCB and the cover bottom,
there is also the possibility of damage to the source PCB.
[0174]
Also, even if the source PCB does not directly collide with the cover bottom, the performance of
the source PCB can be affected if strong vibration of the display panel is continuously
transmitted to the source PCB during sound generation.
[0175]
In order to solve such a problem, it is proposed to provide a buffer member for protecting the
source PCB between the source PCB and the cover bottom or between the display panel and the
cover bottom as shown in FIG.
[0176]
FIG. 12 illustrates an embodiment including a buffer member that can prevent interference and
stuttering between the source PCB and the cover bottom according to FIG.
[0177]
In the embodiment of FIG. 12, a source PCB 700 including a circuit element for driving the
display panel is disposed on the rear surface on one side of the display panel, and a recessed part
(cessed part) 380 is formed in the cover bottom region facing the source PCB. A first buffer
member 920 having a certain elasticity is disposed on the upper surface of the recessed groove
11-05-2019
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380.
[0178]
In addition, a second buffer member 910 can be further disposed on the cover bottom, which
extends along one direction.
[0179]
More specifically, as shown in FIG. 12A, the display panel can be divided into a first area (A)
covering the source PCB and a second area (B) covering the sound generating actuator, and the
second buffer member It is preferable that 920 be long in the direction of dividing the first area
(A) and the second area (B).
[0180]
Of course, although not shown, in the case of the embodiment of FIG. 12, the baffle portion 400
configured of the adhesive member 412 and the sealing portion 414 described in FIG. 7 or 8 on
all four sides of the display panel. Can be placed.
[0181]
The first buffer member 910 and the second buffer member 920 can be made of, for example,
single-sided tape or double-sided tape (Double Side Tape), but not limited thereto, rubber, plastic,
paper, or the like having a certain elasticity. It may be a member of all forms formed of other
materials.
[0182]
Also, the first buffer member 910 is disposed on the recessed groove 380 of the cover bottom,
and the upper surface of the first buffer member 910 is spaced apart from the source PCB by a
predetermined distance, while the second buffer member 920 has one surface. It is preferable
that the cover bottom be in contact and the other surface be in contact with the bottom of the
display panel.
[0183]
Of course, the first buffer member 910 may be disposed on a portion of the top surface of the
cover bottom opposite to the source PCB without the concave portion 380 of the cover bottom.
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34
[0184]
As shown in FIG. 12B, by forming a recess 380 in the cover bottom area corresponding to the
source PCB, the distance between the source PCB and the cover bottom is increased to cause
display panel vibration for generating sound. Reduce the possibility of the source PCB colliding
with the cover bottom.
[0185]
As a result, by disposing the first buffer member 910 on the concave groove 380 of the cover
bottom, even if the display panel is severely vibrated and the source PCB moves toward the
concave groove of the cover bottom, the first buffer can buffer As a result, the noise generation
following the interference between the source PCB and the cover bottom can be reduced and the
possibility of damage of the source PCB can be reduced.
[0186]
In addition, when the display panel vibrates in the second area (B) which is a sound generation
area, the second buffer member 920 partially blocks transmission of the vibration to the source
PCB 700 disposed on the rear surface of the display panel. Thus, there is an effect that the
performance weakening of the source PCB following the continuous vibration of the display
panel can be minimized.
[0187]
In addition, the position of the sound generation actuator can be changed by the arrangement of
the second buffer member 920.
[0188]
That is, as shown in FIG. 12A, when the second buffer member 920 is disposed apart from the
lower side of the display panel by the distance d, the sound generating actuator 200 is moved
about 2 d from the initial position P1 to P2. It can be installed in position.
[0189]
Thus, by changing the position of the sound generation actuator by approximately twice the
separation distance (d) between one side of the display panel and the second buffer member 920,
the sound accompanying the installation of the second buffer member It was confirmed that the
change in output characteristics could be minimized.
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35
[0190]
FIG. 13 is a graph showing the effect of reducing stuttering when the cushioning member
according to the embodiment of FIG. 12 is used.
[0191]
As a result of actual test, when the first buffer member 910 and the second buffer member 920
described in FIG. 12 are not used, as indicated by a dotted line in FIG. 13, a bass band of several
tens Hz and a band of 1000 Hz or more I confirmed that a lot of unnecessary stuttering occurred.
[0192]
On the other hand, when using the cushioning member according to FIG. 12, as indicated by the
solid line in FIG. 13, it can be confirmed that a lot of stuttering in the corresponding band is
reduced.
[0193]
FIG. 14 is a view showing an arrangement relationship between the sound generation actuator
and the set PCB in the display device according to the embodiment of the present invention.
[0194]
Generally, a display device or a set device including the same is connected to a source PCB in
addition to a source PCB including a control circuit (such as a data driver IC) for driving a data
line or touch function of a display panel. Alternatively, the apparatus further includes a set PCB
that controls the entire set device and supplies power.
[0195]
As described in FIG. 10 and the like, the source PCB is attached to the back surface of the display
panel, and the set PCB is attached to the outside of the back surface support structure of the
display device such as a cover bottom or back cover.
[0196]
In the embodiment of FIG. 14, the acoustic generating actuator is disposed at a first position of
the support structure of the display device and the set PCB of the setting device is disposed at a
second position different from the first position. And a display device that can avoid interference
with the set PCB.
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[0197]
As shown in FIG. 14, a set PCB 800 disposed on the rear surface of the cover bottom includes a
power board 810 for supplying power to a display panel etc., various timing pulses for driving
gate lines and data lines, or It may include a timing controller (T-con) 820 for generating timing
signals, a main board (830) including an overall control circuit of the display device or the set
device, and the like.
[0198]
Each board 810, 820, 830 of such a set PCB 800 is attached to the back surface of the cover
bottom 300, and as described above, the sound generating actuator 200 is fixed to be inserted
into the support hole formed in the cover bottom. Ru.
[0199]
Therefore, as shown in FIG. 14, by arranging the installation position (first position) of the sound
generation actuator 200 and the installation position (second position) of the set PCB to be
different from each other, interference between both members is avoided. It is preferable to do.
[0200]
Even if the sound generating actuator 200 is fixed inside the cover bottom, the vibration of the
sound generating actuator is continuously transmitted to the circuit elements of the set PCB if
the installation positions of the sound generating actuator and the set PCB overlap. The set PCB
performance may be adversely affected.
[0201]
Therefore, as shown in FIG. 14, the installation position (first position) of the sound generation
actuator 200 and the installation position (second position) of the set PCB attached to the outside
of the cover bottom are arranged so as not to overlap each other. This has the effect of
facilitating the layout design of components and minimizing the weakening of the performance of
the set PCB.
[0202]
FIG. 15 is a view for showing the case where the display apparatus is symmetrically provided
with two or more actuators, and in that case, the cover bottom twisting phenomenon that can
occur due to the difference in the amount of vibration.
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37
[0203]
On the other hand, according to the present embodiment, a plurality of sound generating
actuators can be symmetrically disposed on the left and right or upper and lower sides of the
display panel so as to output different sounds for each area.
[0204]
For example, as shown in FIG. 15A, one or two left sound generating actuators 1210 and 1210
'are disposed on the left side of the display panel for the purpose of stereo sound implementation
and the like, and one or two right The generating actuators 1220, 1220 'may be arranged to
cause the left / right actuators to vibrate differently.
[0205]
FIG. 15B is a cross-sectional view taken along the line II-II ′ of FIG. 15A, and as described above,
if the left / right sound generating actuators 1210 and 1220 continuously repeat different
vibrations, the amount of vibration of the cover bottom 1300 on the left and right Difference is
continuously accumulated.
[0206]
Usually, the cover bottom is manufactured to be as thin as possible, and if the difference between
the left and right vibration amounts is accumulated, there may occur a problem that the cover
bottom is bent or deformed.
That is, as shown in FIG. 15B, the cover bottom 1300 may be twisted or deformed.
In addition, even if the cover bottom 1300 is not deformed, if the cover bottom vibrates due to
the difference in vibration between the left and right actuators, the generated sound may be
distorted.
[0207]
In order to overcome such problems, as in the embodiment of FIG. 16, when two or more sound
generating actuators are used, a structure is proposed in which a reinforcing member is disposed
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inside the support structure of the display device.
[0208]
FIG. 16 illustrates a structure in which a reinforcing member is disposed on the inside of the
cover bottom in order to prevent acoustic distortion due to twisting of the cover bottom or
vibration of the cover bottom according to FIG.
[0209]
In the embodiment of FIG. 16, as described in FIG. 15, in order to prevent acoustic distortion due
to deformation of the cover bottom or vibration of the cover bottom when a plurality of sound
generating actuators having different vibration characteristics are used, respectively. In addition,
one or more reinforcement members 1310 can be disposed inside or outside the cover bottom.
[0210]
Such a reinforcing member 1310 may be formed in the form of a long bar passing through
positions near a plurality of sound generating actuators, and may be disposed at a specific
position so that the reinforcing characteristic can be optimized. preferable.
[0211]
When two left sound generating actuators 1210 and 1210 'and two right sound generating
actuators 1220 and 1220' are disposed as shown in FIG. 16A, the reinforcing member 1310 is
one of the two left sound generating actuators 1210 and 1210 '. It can be arranged to pass
through the point Q and the middle point Q 'of the two right side sound producing actuators
1220, 1220'.
[0212]
When configured in this manner, the reinforcing performance of the reinforcing member 1310
can be optimized even when the two left and right acoustic generating actuators have different
vibration characteristics.
[0213]
Such a reinforcing member 1310 may be attached to the inner surface of the cover bottom after
being manufactured in a separate metal bar form as shown in FIG. 16B, but is not limited thereto.
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[0214]
For example, when the cover bottom is manufactured by mold injection or the like, a part of the
inner surface of the cover bottom may be protruded to integrally form the reinforcing member
1310.
[0215]
Also, the reinforcing member 1310 need not necessarily be present on the inner surface of the
cover bottom, and may be disposed on the rear outer surface of the cover bottom, but in
consideration of the appearance reasons and the thickness of the display device, etc. Preferably,
the member is formed on the inner surface of the cover bottom 1300.
[0216]
FIG. 17 illustrates a specific arrangement of the cover bottom reinforcement members.
[0217]
FIG. 17A exemplifies the case where three sound generating actuators are arranged on the left
and right sides, in this case, two reinforcing members 1310 and 1310 ′ are arranged, and the
first reinforcing member 1310 has three lefts. Of the left and right sound generating actuators,
the second reinforcement member 1310 'is disposed to pass through the midpoint QQ' of the line
segment connecting the two actuators on the upper side among the right sound generating
actuators, and Among them, it is possible to arrange so as to penetrate a midpoint S-S 'of a line
segment connecting the two lower actuators.
[0218]
Also, 17B is a case where only one each of the left and right side actuators are disposed, and in
this case, the reinforcing member 1310 can be disposed so as to pass through the centers of the
left and right side actuators 1210 and 1210 ′. The reinforcement member may be divided into
two or more parts in consideration of the installation structure of the actuator inserted and
supported on the bottom.
[0219]
As described above, when two or more sound generating actuators having different vibration
characteristics are arranged symmetrically, the deformation (torsion) of the cover bottom or the
vibration of the cover bottom according to the vibration characteristics where the sound
generating actuators are different. Have the effect of preventing acoustic distortion.
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[0220]
FIG. 18 illustrates an embodiment further including an acoustic compensation member
positioned to maintain acoustic output characteristics when the acoustic generation actuator is
moved up and down for design reasons.
[0221]
FIG. 18A illustrates a state in which the sound generation actuator 200 is installed at the first
position P3 having the optimum sound output characteristics.
[0222]
However, sometimes it may be necessary to maintain the slimness of the upper end portion, or to
move the sound-generating actuator by a fixed distance D from the initial position P3 due to
design or layout design of parts, etc. .
[0223]
In this case, if the sound generation actuator is simply moved, the state position with respect to
the baffle portion 400 or the like is changed, and as a result, the sound output characteristics
may be deteriorated.
[0224]
Therefore, in such a case, when moving the sound generating actuator from the initial position P
to the target position P4 separated by the movement distance D, the position is separated by 2D
from the edge (side) opposite to the movement direction It is preferable to further arrange the
acoustic compensation member 1400 arranged.
[0225]
That is, as shown in FIG. 18B, when the sound generation actuator is moved from the initial
position P3 to P4 which is separated downward from the initial position P3 by D for design
reasons, it is long horizontally at a position 2D away from the upper edge of the display panel
The acoustic compensation member 1400 to be disposed is disposed.
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As described above, when the acoustic compensation member is disposed at a position
corresponding to about twice the movement amount D of the acoustic generation actuator, the
actuator moved to the center of the air gap space changed by the acoustic compensation member
is located. It becomes possible to minimize the change of the sound generation characteristic
accompanying the movement of the actuator.
[0226]
The sound compensating member 1400 may be embodied by a double sided tape disposed
between the cover bottom and the display panel.
[0227]
Thus, when it is necessary to move and arrange the acoustic generating actuator, the acoustic
compensation member is arranged at a position proportional to the movement distance to
maintain the relative position of the actuator within the entire air gap area. It has the effect of
preventing changes in acoustic characteristics associated with movement.
[0228]
FIG. 19 is a graph showing sound output characteristics when the panel vibration type sound
generating apparatus according to the present embodiment is used, in contrast to the
conventional general speaker.
[0229]
As a result of the actual experiment, as shown in FIG. 1, in the case of using a speaker separately
disposed on the rear surface or the lower end with the display panel, as shown by a dotted line in
FIG. Sound intensity reduction (sound pressure reduction) occurred.
[0230]
On the other hand, as shown by the solid line in FIG. 19, in the case of using a method of directly
vibrating the display panel by fixing one or more sound generating actuators to the support
structure as in the present embodiment, The sound pressure reduction phenomenon can be
reduced, and it can be confirmed that the sound output characteristic particularly in the high
sound band is significantly improved.
[0231]
As a result, it can be understood that rich acoustic output can be provided in all the tone ranges
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by using this embodiment.
[0232]
As described above, according to the present embodiment, the traveling direction of the sound is
equal to the image output direction by fixing the one or more sound generating actuators to the
support structure and directly vibrating the display panel to generate the sound. Therefore, the
localization feeling of the sound is improved, and the sound output characteristics can be
improved in a wide sound range.
[0233]
In addition, since it is not necessary to dispose a separate speaker in the display device or the
setting device, the mechanism design of the setting device can be facilitated, and the thickness of
the display device or the setting device can be reduced.
[0234]
In particular, it has excellent sound generation performance by forming a fixed air gap between
the display panel and the sound generation actuator, and inserting and fixing the sound
generation actuator in the support hole formed by the support structure of the display device.
And the thickness of the display can be reduced.
[0235]
Also, by forming an adhesive member (double-sided tape portion) adhered between the bottom
surface of the display panel and the upper surface of the support structure of the display device,
and a baffle portion including a sealing portion further disposed on the outer shell of the
adhesive member. By minimizing the sound leakage, the sound generation performance can be
improved.
[0236]
Also, one between the support structure disposed on the rear surface of the display panel to fix /
support the acoustic generation actuator and the source PCB of the display panel, or between the
rear surface of the display panel near the source PCB and the inner surface of the support
structure By arranging the above buffer members, interference and noise between the source
PCB (S-PCB) for driving the display panel and the support structure of the display device can be
prevented.
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[0237]
Also, when two or more sound generating actuators are used, preventing deformation of the
support structure according to different vibration characteristics of the two or more sound
generating actuators by arranging a reinforcing member in the support structure of the display
device Have the effect of
[0238]
The above description and the attached drawings merely illustrate the technical concept of the
present invention, and essential characteristics of the present invention can be obtained by those
skilled in the art to which the present invention belongs. Various modifications and changes such
as combination, separation, replacement, and modification of configurations are possible without
departing from the scope of the present invention.
Accordingly, the embodiments disclosed in the present invention are not intended to limit the
technical spirit of the present invention, but are for explanation, and the scope of the technical
spirit of the present invention is limited by such embodiments. It is not a thing.
The scope of protection of the present invention should be interpreted by the claims, and all
technical concepts within the equivalent scope should be construed as being included in the
scope of the present invention.
[0239]
Reference Signs List 100 display panel 200 acoustic generating actuator 210, 210 'upper and
lower plate 220 magnet 230 center pole 240 external frame 250 bobbin 260 (voice) coil 300,
1300 cover bottom 310 support hole 370 cable through hole 380 recessed groove 400 baffle
portion 412 adhesive member 414 Sealing part 500 Middle cabinet 600 Air gap (space) 700
Source PCB (S-PCB) 800 Set PCB 910 First buffer member 920 Second buffer member
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