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JP2009081743

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2009081743
An object of the present invention is to increase the sound pressure of a speaker from sound
holes on both sides of a housing of a mobile phone. SOLUTION: In a stereo speaker arrangement
structure of a portable telephone, each of both ends of a housing 101 on which a screen display
unit 102 is mounted, a plurality of vertical directions with respect to the screen display unit and
a plurality of side directions of the housing. Two sound holes 204 and 205 which form a hole
and pass sound, and located inside each sound hole, are arranged to face the front of the case at
a constant inclination angle with the side of the case, Two speakers 103, 104 for reproducing
stereo sound through the holes are provided. [Selected figure] Figure 4
Stereo speaker arrangement structure and method for mobile phone
[0001]
The present invention relates to a stereo speaker arrangement structure of a mobile phone in
which stereo speakers are arranged on both sides of a display screen. In particular, the present
invention relates to a stereo speaker arrangement structure and method of a mobile telephone
that enhances the sound pressure of the output of the stereo speaker.
[0002]
FIG. 14 is a schematic external view of a mobile phone on which the present invention is based.
In addition, the same code | symbol and number are described to the same component through
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all the figures. As shown in the figure, the portable telephone comprises an upper housing 101
and a lower housing 106, a screen display unit 102, a receiver 105, and speakers 103 and 104
are mounted on the upper housing 101, and key input is performed on the lower housing 105.
The unit 107 and the microphone 108 are mounted.
[0003]
The screen display unit 102 reproduces a moving image and the like, the receiver 105 is a
receiver of a telephone, and the speakers 103 and 104 reproduce stereo sound from the moving
image and the like reproduced by the screen display unit 102. Is used for input of a telephone
number, operation of function display, etc. The microphone 108 is a transmitter of the telephone.
The speakers 103 and 104 are arranged in parallel with the state of the vertical screen of the
screen display unit 102 facing the left and right.
[0004]
Further, the speakers 103 and 104 have sound holes on the side surfaces on both sides of the
upper housing 101, and the sound pressures from the speakers 104 and 103 are directed in the
left and right directions 110 and 109, respectively. Therefore, when a moving image or the like is
reproduced on the vertical screen, a stereo effect is obtained. However, the sound holes of the
speakers 103 and 104 are disposed on the side surfaces and do not face the direction of the
viewer directly, so there is a problem that the sound pressure securing to the viewer is severe.
[0005]
The prior art related to such a stereo speaker of a mobile phone is as follows. Conventionally, in
order to provide a portable terminal device capable of comfortable and high-quality sound
reproduction and having high adaptability to the use environment and high convenience, in the
sound reproduction system of the portable terminal device 1, at least two of the portable
terminal devices are used. One acoustic speaker is provided, and the at least two acoustic
speakers are simultaneously driven to assist each other in reproducing sound (see, for example,
Patent Document 1).
[0006]
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However, in the cited reference 1, in order to eliminate the crosstalk of the two sound speakers,
they are directed outward, but as described above, the sound pressure shortage of the stereo
speakers, which is the premise of the present invention, It does not improve. Also, conventionally,
the upper case and the lower case of the mobile phone are hinged to suppress increase in the
number of speakers and to be able to properly listen to stereo sound regardless of the orientation
of the display screen. The upper case is provided with a rectangular display screen, and the
speaker is in the area at the right end above the display screen, and in the left end area below the
display screen. Loudspeakers are provided, respectively, and the speakers are speakers for stereo
sound reproduction. In stereo sound reproduction in the use state shown in the vertical
orientation, the right speaker from the right speaker to the stereo right channel and the left
channel from the left speaker respectively Although it is played back, in the horizontal use state
where it is turned to the left from the state shown in the figure, the speaker from the right side to
the stereo right channel becomes the left side. From some of which the left channel are
respectively reproduced (e.g., see Patent Document 2).
[0007]
However, in Patent Document 2 described above, right and left speakers are provided in front of
the upper and lower portions of the display screen diagonally on the display screen, and
sufficient sound pressure of the speakers can be obtained from the front. The sound pressure of
the speaker can not be obtained as in Patent Document 2 when the sound pressure of the
speaker can not be obtained from the front and the sound pressure can not be obtained from the
side as in the above.
[0008]
In addition, in order to perform optimal stereo sound reproduction even when displaying is
conventionally performed using either the front display unit provided on the front of the display
unit casing or the rear display unit provided on the back of the display unit casing, The control
unit determines which of the front display unit and the back display unit is displayed based on
the detection result of the open / close detection unit, and determines the inclination
(orientation) of the display screen based on the detection result of the inclination sensor. And,
according to the display (inclination) of the display screen and which one is displayed, the sound
of the right (R) component and the left (L) component is distributed to the speaker to perform
optimal stereo sound reproduction (See, for example, Patent Document 3).
[0009]
However, in Patent Document 3 above, left and right speakers are provided in front of the upper
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and lower portions of the display screen diagonally on the display screen, and the sound
pressure of the speakers can be sufficiently obtained from the front. The sound pressure of the
speaker can not be obtained as in Patent Document 3 when the sound pressure of the speaker
can not be obtained from the front and the sound pressure can not be obtained from the side as
in the above.
[0010]
Also, conventionally, even when the display unit casing is displaying at any angle with respect to
the operation unit casing, in order to perform optimum stereo sound reproduction, the operation
unit casing and the display unit casing are The display housing is connected by a rotary hinge,
and the display housing is rotated around the rotary hinge, and three speakers are provided at
predetermined positions of the display in the display housing. The portable terminal detects the
angle of the rotary hinge unit, and specifies the speaker positioned on the rightmost side and the
speaker positioned on the leftmost side with respect to the erected display image displayed on
the display unit. Then, there is also one that outputs right audio from the right side of the erected
display image and outputs left audio from the left side of the display image (for example, see
Patent Document 4).
[0011]
However, in Patent Document 4 described above, three speakers are mounted around the display
unit, and the sound pressure of the speakers can be obtained from the front, but a sufficient
installation space can not be obtained as in the speakers on which the present invention is
premised. When the sound pressure of the speaker can not be obtained from the front and the
sound pressure needs to be obtained from the side, the sound pressure of the speaker can not be
obtained as in Patent Document 4 described above.
[0012]
JP 2002-111817 JP JP 2003-078601 JP JP 2006-174074 JP JP 2006-174277 JP
[0013]
Therefore, in view of the above problems, it is an object of the present invention to provide a
stereo speaker arrangement structure and method of a mobile telephone that increases the
sound pressure of the speaker from the sound holes of the side surfaces on both sides of the
housing of the mobile telephone.
[0014]
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In order to solve the above-mentioned problems, the present invention provides a stereo speaker
arrangement structure of a portable telephone, wherein each of both end portions of a housing
on which a screen display unit is mounted is in a direction perpendicular to the screen display
unit. A porous hole formed in the side direction of the housing, sound holes for passing sound,
and located inside each sound hole, in the front of the housing at a constant inclination angle
with the side surface of the housing There is provided a stereo speaker arrangement structure of
a portable telephone, comprising: speakers arranged to face and reproducing stereo sound
through the sound holes.
Furthermore, the constant tilt angle is substantially 45 °.
[0015]
Furthermore, when the screen display unit is a vertical screen, the sound hole on one side, the
speaker, and the sound hole on the other side and the speaker are located opposite to each other
across the screen display unit.
Furthermore, when the screen display unit displays a vertical screen or a horizontal screen, one
of the sound hole and the speaker, and the other sound hole and the speaker are provided
diagonally on the screen display unit.
Furthermore, when the screen display unit switches from one horizontal screen to the other
horizontal screen when the housing rotates 90 degrees to the left or right, the left and right
sound sources of the two speakers are switched to each other.
[0016]
Furthermore, in the stereo speaker arrangement method of a mobile phone, each of both end
portions of the housing on which the screen display unit is mounted has porosity in the direction
perpendicular to the screen display unit and in the side direction of the housing In the process of
forming sound holes, each speaker is disposed inside each sound hole at a constant inclination
angle with the side surface of the housing so as to face the front of the housing, and through
each sound hole And b. Reproducing stereo sound. A method of arranging stereo speakers of a
portable telephone is provided.
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[0017]
As described above, according to the present invention, each of both ends of the housing on
which the screen display unit is mounted has a plurality of holes in the direction perpendicular to
the screen display unit and in the side direction of the housing Two sound holes are formed, and
two speakers are arranged inside each sound hole so as to face the front of the case at a constant
inclination angle with the side of the case, and stereo sound is transmitted through each sound
hole. Since the reproduction is performed, the sound pressure of the stereo is increased for the
viewer of the moving picture and the television without largely changing the arrangement of the
speakers as compared with the prior art, and the effect of spreading to the left and right can be
obtained.
[0018]
Furthermore, a stereo effect with high sound pressure can be obtained on both vertical and
horizontal screens.
Furthermore, for switching from the vertical screen to the horizontal screen and from the
horizontal screen to the vertical screen for the left and right 90 ° rotation of the screen display
unit, switching of the two speakers is performed alternately so that the left and right sound
sources for the viewer do not change. it can.
[0019]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
FIG. 1 is a perspective view showing an outline of a cellular phone according to the present
invention.
As shown in this figure, compared to FIG. 14, the mobile telephone can be stored so that the
upper housing 101 and the lower housing 106 overlap by the slide operation mechanism, and
the speakers 103 and 104 are displayed on the screen display unit 102 by the upper housing
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101. Are provided at adjacent side ends, and have a structure to increase the sound pressure to
the viewer as described later.
[0020]
FIG. 2 is a view showing a storage state of the mobile phone in FIG.
As shown in this figure, it is in the state of being slid and stored from the state of the mobile
phone of FIG.
FIG. 3 is a perspective view of a cellular phone showing sound holes of a speaker in which a
portion indicated by a circle 201 in FIG. 2 is enlarged.
As shown in the figure, the sound hole 205 of the speaker 104 is provided at one side end of the
upper case 101 where the speaker 104 is provided, and similarly the other side end of the upper
case 101 is provided with the speaker 103. Sound holes 204 (not shown) are provided.
[0021]
The sound hole 205 of the speaker 104 provided at the side end is a vertical direction with
respect to the screen display unit 102, that is, a front direction toward the viewer and a vertical
screen of the screen display unit 102 at the side of the upper housing 101. It has a porosity
formed by a set of a plurality of small holes in the side direction facing left when viewing, and
allows the sound from the speaker 104 to pass through. Similarly, the sound hole 204 of the
speaker 103 provided at the side end is perpendicular to the screen display unit 102, that is, the
front direction toward the viewer and the vertical direction of the screen display unit 102 at the
side of the upper housing 101. When viewed on a screen, it has a porosity formed by a set of a
plurality of small holes in the side direction pointing to the right, and allows the sound from the
speaker 103 to pass through.
[0022]
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FIG. 4 is a cross-sectional view of line AA of FIG. As shown in this figure, the upper housing 101
is provided with the sound holes 204 and 205 of the speakers 103 and 104 as described in FIG.
3, and the speakers 103 and 104 are provided inside the sound holes 204 and 205. The
speakers 103 and 104 are mounted, and the speakers 103 and 104 are disposed facing the
viewer, which is the front of the upper housing 101 on which the screen display unit 102 is
mounted, at an angle of about 45 ° with the side surface of the upper housing 101. Be done.
The screen display unit 102 is disposed between the speakers 103 and 104, and is connected to
the circuit board 408 together with the other components 409 and 410.
[0023]
The upward inclination angle of the above speaker is 45 ° as an example, and the speaker is
completely upward, ie, in the case of facing the front, the upward inclination angle is 90 ° and
the speaker is sideways In the case, the upward tilt angle is 0 °. The upward tilt angle may be a
fixed angle, and can be adjusted by the installation space of the speaker. FIG. 5 is a view for
explaining an operation example of the speaker of the mobile phone in FIG. As shown in the
figure, the screen display unit 102 reproduces a moving image etc. At this time, the speaker 103
is positioned on the right side with respect to the viewer, and the speaker 104 is positioned on
the left side. As shown in FIG. 4, sound pressure directions 406a-c and sound pressure directions
407a-c are formed. The sound pressure directions 406a and 407a are directed to the viewer
directly, and an effect of increasing the sound pressure of the stereo can be obtained. The sound
pressure directions 406b, c, 407b and c respectively extend in the left and right directions, and
thus affect the stereo effect. In this manner, the sound pressure of the stereo can be increased for
viewers of moving pictures and television without largely changing the arrangement of the
speakers as compared with the conventional arrangement, and the effect of spreading to the left
and right can be obtained.
[0024]
FIG. 6 is a modification of FIG. 1 and is a perspective view showing a schematic appearance of a
mobile phone according to the present invention. As shown in the figure, compared to FIG. 1, the
speaker 103 is positioned at the lower right of the screen display unit 102, and the speaker 104
is positioned at the upper left of the display unit 102 of the screen. Conversely, the speaker 103
may be located at the upper left of the screen display unit 102 and the speaker 104 may be
located at the lower right of the display unit 102 of the screen. The structures of the speakers
103 and 104 and their sound holes 204 and 205 are the same as described above. That is, the
speakers 103 and 104 are arranged diagonally on the screen display unit 102.
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[0025]
FIG. 7 is a view showing the storage state of the mobile phone in FIG. As shown in this figure, it is
in the state of being slid and stored from the state of the mobile phone of FIG. FIG. 8 is a view for
explaining an operation example of the speaker of the mobile phone in FIG. As shown in the
figure, in the mobile phone, with the slide open, a moving image or the like is reproduced on the
vertical screen on the screen display unit 102. At this time, the sound pressure 406 of the
speaker 103 The sound pressure 407 of 104 is directed to the viewer at the upper left side, and
a stereo effect spreading from side to side is obtained.
[0026]
FIG. 9 is a view for explaining an operation example of the speaker of the mobile phone in FIG. As
shown in the figure, in the mobile phone, with the slide closed, a moving image or the like is
reproduced on the horizontal screen on the screen display unit 102. At this time, the sound
pressure 406 of the speaker 103 Reference numeral 407 denotes a viewer at the lower left side,
and a stereo effect spreading from side to side is obtained. Therefore, according to the present
invention, a stereo effect with high sound pressure can be obtained on both the vertical screen
and the horizontal screen.
[0027]
In the above description, the upper housing 101 and the lower housing 106 are overlapped by
the slide operation mechanism, but the mobile telephone further has a mechanism for rotating
the upper housing 101 by 90 ° to the left and right. FIG. 10 is a diagram for explaining an
operation example of the speaker when the upper housing 101 is rotated 90 degrees to the left.
As shown in the figure, in the mobile phone, with the upper housing 101 rotated 90 ° to the
left, a moving image or the like is reproduced on the horizontal screen on the screen display unit
102. At this time, the sound pressure 406 of the speaker 103 is a viewer. On the other hand, the
sound pressure 407 of the speaker 104 is directed to the viewer at the upper left and lower left,
and a stereo effect spreading further to the left and right is obtained.
[0028]
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FIG. 11 is a diagram for explaining an operation example of the speaker when the upper housing
101 is rotated 90 degrees to the right. As shown in the figure, in the mobile phone, with the
upper housing 101 rotated 90 ° to the right, a moving image or the like is reproduced on the
horizontal screen on the screen display unit 102. At this time, the sound pressure 406 of the
speaker 103 is a viewer. On the other hand, the sound pressure 407 of the speaker 104 at the
lower left side is directed to the viewer at the upper right side, and a stereo effect spreading
further to the left and right is obtained.
[0029]
FIG. 12 is a block diagram showing a schematic configuration of a circuit that switches the left
and right sound sources of the speaker as the upper housing 101 rotates. As shown in the figure,
a speaker amplifier 502 is connected to the speakers 103 and 104 via a switch 501, the speaker
amplifier 502 outputs left and right sound sources, and the switch 501 outputs the sound to the
speakers 103 and 104 from the speaker amplifier 502. Switch the left and right sound sources.
[0030]
The control unit 503 is connected to the switch 501, and the control unit 503 controls the switch
501 to control switching of the left and right sound sources to be output to the speakers 103 and
104 with respect to 90 ° left / right rotation of the upper housing 101. FIG. 13 is a flowchart
for explaining an operation example of the control unit of FIG. As shown in the figure, in step
S601, when the screen display unit 102 of the mobile phone is displayed on the vertical screen,
the control unit 503 reproduces the right sound source and the speaker 104 generates the left
sound source. The control is performed to perform the reproduction (state of FIG. 8).
[0031]
In step S602, when the screen display unit 102 of the mobile phone is displayed on the
horizontal screen rotated 90 ° to the left, the control unit 503 reproduces the right sound
source and the speaker 104 reproduces the left sound source. Control to perform (state of FIG.
10). If the screen display unit 102 of the mobile phone is returned to the original state, the
process returns to step S601. In step 603, when the screen display unit 102 of the mobile phone
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is displayed on the horizontal screen rotated 90 ° clockwise, the control unit 503 reproduces
the left sound source and the speaker 104 reproduces the right sound source. Control is
performed (the state of FIG. 11). If the screen display unit 102 of the mobile phone is returned to
the original state, the process returns to step S601.
[0032]
Therefore, according to the present invention, the speakers are mutually switched so that the left
and right sound sources for the viewer do not change for switching from the vertical screen to
the horizontal screen and from the horizontal screen to the vertical screen for 90 ° rotation on
the left and right of the screen display unit 102. 103, switching of the speaker 104 is controlled.
[0033]
Although the portable telephone has been described above, the present invention is not limited to
this, and the present invention can be similarly applied to a personal digital assistant (PHS) and a
personal digital assistant (PDA).
[0034]
FIG. 1 is a perspective view showing a schematic appearance of a mobile phone according to the
present invention.
It is a figure which shows the accommodation state of the mobile telephone in FIG.
FIG. 3 is a perspective view of a mobile phone showing a sound hole of a speaker in which a
portion shown by a circle 201 in FIG. 2 is enlarged and displayed. It is sectional drawing of line
AA of FIG. It is a figure explaining the operation example of the speaker of the mobile telephone
in FIG. It is a modification of FIG. 1, and is a perspective view which shows the outline external
appearance of the mobile telephone based on this invention. It is a figure which shows the
accommodation state of the mobile telephone in FIG. It is a figure explaining the operation
example of the speaker of the mobile telephone in FIG. It is a figure explaining the operation
example of the speaker of the mobile telephone in FIG. It is a figure explaining the operation
example of the speaker at the time of the upper housing | casing 101 rotating 90 degrees to the
left. It is a figure explaining the operation example of the speaker at the time of the upper side
housing | casing 101 rotating 90 degrees to the right. FIG. 6 is a block diagram showing a
schematic configuration of a circuit that switches left and right sound sources of the speaker as
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the upper housing 101 rotates. It is a flowchart explaining the operation example of the control
part of FIG. FIG. 1 is a schematic external view of a mobile phone on which the present invention
is premised.
Explanation of sign
[0035]
101 Upper housing 102 Screen display unit 103, 104 Speaker 105 Receiver 106 Lower housing
107 Key input 108 Microphone 109, 110 Sound pressure direction 204, 205 Sound hole 406,
407 Sound pressure Direction 406a-c ... sound pressure direction 407a-c ... sound pressure
direction 408 ... circuit board 409, 410 ... other components 501 ... switch 502 ... speaker
amplifier 503 ... control unit
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