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JPS5661897

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DESCRIPTION JPS5661897
The name display device 1 of the invention, by attaching a transparent piezoelectric element via
a transparent adhesive to a transparent cover provided on the front surface of the display panel
of the display device and attached to the periphery of the display panel of the display device K by
K In the display device which is a cover peristaltic body, it is preferable that the transparent
cover be attached to a case with an elastic body interposed so as not to weaken the vibration
strength as a lens unit. S, 1 is provided on the front of the display panel of the water device and
on the transparent cover attached to the case of the KJ4 II Rik display via a transparent adhesive
[The transparent cover is used as a vibrator by affixing a transparent piezoelectric element In the
display device, the transparent cover is interposed with an elastic body so as to prevent vibration
strength from being applied to the conductive case, and the elastic body is a conductive material
and this elastic body is a piezoelectric cover of the transparent cover. A display device in which a
bright electrode of 10,000 a bright electrodes of a piezoelectric element is electrically isolated
via a conductive layer coated on a mounting surface.
Claims
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device
using a transparent cover made of a transparent body provided on the front surface of a display
panel of a display device as a sound producing body, with a conventional alarm function! The I(with buzzer) watch has a diaphragm attached to the back cover of the back of the case, and the
diaphragm vibrates to generate a sound and to the outside through the sound extraction hole
provided on the back iik Is taking out. However, in the case of a watch of this construction, since
the vibration plate which is the sound source is covered with the case and the a-shake, the sound
propagating to the outside is attenuated and made smaller, or the vibration plate is protected.
There was one point, such as thickness becoming thick. So, recently 111i! As shown in FIG. 2, a
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watch having a cover as a sounding body by directly vibrating the transparent cover 5 provided
on the front surface of the display panel l of the main body number incorporating the display
panel l, the drive source S9 and the clock drive unit 8 etc. Has been proposed. In order to vibrate
the cover bEndPage: 1, as shown also in FIG. 48, transparent vapor deposition electrodes 8 ° 9
are applied on both sides through the transparent adhesive 7 inward with the transparent # 41 g
charged and the like 6 of the cover 5 coated. Affixing the provided transparent piezoelectric
ceramic plate lO, a contact (contact) 11 in contact with the transparent deposition electrode 6 of
the cover 5 and a contact (contact) with the exposed one transparent deposition electrode 9 of
the transparent piezoelectric ceramic plate lO By applying a voltage to the transparent
piezoelectric ceramic plate lO using the contact point 1B to vibrate, the cover 5 in the -5 "C
integrated state is vibrated to generate a sound. In addition, the cover 5 visits the main body 4
and is coupled while using the loose bond paskin 18 as a pedestal. However, the circumference
11 of the cover where such a constitution becomes a node of vibration! Since the 11th surface is
directly fixed to the case body, there is a drawback that the vibration intensity is reduced and the
sound is reduced. Therefore, an object of the present invention is to provide a display device
having a structure that does not reduce the generated sound intensity. In order to achieve such
an object, according to the present invention, a transparent piezoelectric element is attached to a
transparent cover provided on the front surface of a display panel of a display device and
attached to the peripheral edge of the display panel. In the display device having the transparent
cover as a vibrator by attaching it, the transparent cover is attached to the case with an elastic
body interposed so as not to weaken the vibration intensity, and in another embodiment, the case
and the case An elastic layer is used as a conductor, and an insulating layer coated on the
piezoelectric element mounting surface of the transparent cover is electrically connected to one
of the transparent electrodes of the piezoelectric element so that no contact for the ground
potential of the piezoelectric element is provided. It is a thing.
Hereinafter, the present invention will be described by way of examples. FIG. 8 is a crosssectional view showing a part of a watch according to an embodiment of the present invention, in
which a transparent cover 14 made of transparent glass covering a front surface of a display
panel is shown. Printing is carried out in the shape of a frame on the lower surface peripheral
edge of the transparent cover 14 to form an opaque # 4 dovetail 15. The opaque layer 15 is
formed via the lower surface IC of the transparent cover 14 and the bright adhesive
[Piezoelectric element l to be attached? A peripheral edge portion of the transparent cover 14 is
provided to make the upper side D of the transparent cover 14 invisible. Moreover, the opaque
layer 15 may also have a display symbol etc. on the transparent cover side. Further, on the
surface of the opaque layer 15, a conductor layer 18 formed of an aluminum vapor deposition
film is formed. Furthermore, in the inner surface of the piezoelectric element 1 In, 0.. -8 nO,
Transparent electric 4Ii consisting of 19.20 has been formed. Then, the transparent electrode 19
on the adhesive side is in close contact with the conductor layer 18 and electrically! sがる。 In
addition, the transparent cover 14 is attached to the conductive case (the main body 1g in a
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fitted state) via the conductive pad (elastic body) 21 at the peripheral end. As a result, since the
transparent cover 14 is elastically supported at both ends serving as nodes of vibration, the
vibration of the transparent cover is not affected and the sound does not become small. Because
of this, the case B2 and the adhesive-side transparent electrode 19 of the piezoelectric element
17 are electrically connected. On the other hand, the output contact 28 of the piezoelectric
element 1 ′ 7 contacts the transparent electrode 20 on the exposed side directly below the
opaque layer 15. For this reason, since the output image point 22 is out of the display area (field
of view area) of the transparent cover 14 shown by 1 in the figure, it is K so as not to be seen
from the outside as shown in FIG. Further, since the bonding side transparent electrode 19 of the
piezoelectric element 17 electrically couples the conductive layer 18 and the case 2z to the
ground contact of the piezoelectric element 17, it becomes a favor when the case 82 is set to the
ground potential. According to such an embodiment, since the transparent cover 14 is elastically
supported, the vibration due to the strain of the piezoelectric element 17 is not reduced. For this
reason, a loud noise is generated to function as an alarm. Also, in this embodiment, one of the
electrodes of the piezoelectric element is electrically grounded in the case, and when used as a
ground potential, the ground contact is' I It is not necessary to provide 'lK. The present invention
is not limited to the embodiment KM. For example, as shown in FIG. 4, the packing 21 may be an
L-shaped packing having an L-shaped cross section. Also, as shown in FIG. 5, I-type patches 84
may be used in an L-shape.
Furthermore, although not shown, the transparent cover 14 may be attached to the case 22 with
an elastic adhesive (which may be conductive) instead of a pad. EndPage: 2 Also, the present
invention is not a watch The present invention is also applicable to other timepieces or electronic
devices having a display unit of a calculator. As described above, according to the display device
of the present invention, it is possible to provide a display device having a structure that does not
reduce the generated sound intensity.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing the outline of a
conventional watch, FIG. 2 is a partially enlarged cross-sectional view of the same, and FIG. 8 is a
cross-sectional view showing a part of a watch according to an embodiment of the non-invention
4 and 5 are cross sectional views showing a part of a watch according to another embodiment of
the present invention. 1 ... display panel, 2 ... drive source, 8 ... watch driving group ... main body,
5 ... cover, 6 ... transparent evaporation electrode,? ... Transparent adhesive, 8.9 ... vapor
deposition electrode, lO ... transparent piezoelectric magnetic plate, 11. 1B: contact, 18: patkin,
14: transparent cover, l6-: opaque layer, 16: transparent adhesive, 17: piezoelectric element, 18:
conductive layer, 19 ° 20: Transparent electrode, Bl: Patzkin, z2-: Case z8: Output contact point,
B4: Ifi Patzkin's agent 9 P Shio Shi thin 1) First fist! ″i!! Fig. 2 / lIIEndPage: 3
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