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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to flat
display devices such as liquid crystal televisions and gas discharge televisions, and more
particularly to a flat display device integrated with a translucent flat speaker. [Prior Art] As an
example of a flat panel television, a liquid crystal television is a "liquid crystal color image display
device", Varnish ID. 84, Digest, page 316 ("4.25-in. andl、51−in、
o1y−3iTFTs”。 DID84Digest、p316(1984)、S。 Morozumi,
et, al)), gas discharge television r high efficiency Townsend discharge memory panel color TVJ.
ニス・アイ・ディ、8’4. Digest, page 91 ("An 8-i n, -Diagonal High-EfficacyTownsendDischarge Mamory Panel Co1orTVDisplay", SID 84 Digital, p91 (1984). S, Mikoshiba at, al, and),
and the translucent flat loudspeakers are announced in Nikkan Kogyo Shimbun (August 29,
1984). [Problems to be Solved by the Invention] The above-mentioned prior art is only described
separately, and various problems such as vibration generated when combining the flat display
device and the translucent flat speaker are mentioned. It is not done. An object of the present
invention is to solve the above-mentioned problems and to provide a flat display apparatus to
which a translucent flat speaker is suitably attached. [Means for Solving the Problems] By
mounting the translucent flat speaker on the display surface of the flat television display device,
the occupied space of the device can be made small, and since the image and the sound are
emitted from the same surface, the sense of realism Increase. Vibrations emanating from the flat
speaker may reduce the life and reliability of the flat television apparatus. In addition, the sound
emitted from the flat speaker in the direction of the flat television is reflected on the flat
television surface and returns to the viewer, causing interference with the sound emitted from
the flat speaker to the viewer and degrading the sound quality. . In order to prevent these, a
vibration absorber made of a dielectric is inserted between the flat speaker and the flat television.
When the dielectric is a solid having a mesh or dot configuration, the display image quality can
be prevented from being degraded by setting the period (pitch) of the above structure to the
same as or an integral multiple of the period (pitch) of the display cell.
In addition, by coloring at least one of the dielectric and the translucent speaker, it is possible to
prevent reflection by external illumination and to improve display contrast. Furthermore, by
performing non-glare processing on the front surface of the flat speaker, room light can be
diffusely reflected to improve display image quality. [Operation] The light transmitting flat
speaker is variable in light transmittance from 25% to 95%, and can increase the contrast ratio of
the display image of the flat television display device. The light transmitting flat speaker can be
made light with plastics, so that the weight of the TV display does not increase significantly, and
it also protects the glass face plate of the flat TV. In addition, since the flat speaker blocks the
heat rays, it is possible to block the flow of heat inside and outside the flat television. In general,
according to the present invention in which the speaker is heavy and the bass area can be more
easily reproduced as the area is larger, the area of the speaker can be increased to almost the
same size as the display area of the flat screen television display MW So the sound quality is
better. Not only can the number of parts be reduced if a conductive thin film or the like that
constitutes a part of the flat speaker is formed on the translucent face plate of the flat television
display device, the weight of the speaker is relatively large. Since the weight of the flat panel
display is approximately equal to that of the flat panel display, bass can be easily reproduced. In
addition, if the translucent flat speaker on the display surface is divided into upper, lower, left,
and right, and different sounds are emitted from each of them, there is an advantage that a stereo
effect is generated to increase the sense of reality. A transparent adhesive is used to bond the
translucent speaker and the flat-panel TV display device, but if it is bonded by pressure bonding,
there is no unevenness and the display image quality is not lowered. An embodiment of the
present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view
when the flat speaker 20 is mounted on the flat television display device 1o and a dielectric 3 °
is inserted between the two. The dielectric may be colored to improve the contrast. The vibration
from the flat speaker 20 is a vibration in a direction (horizontal direction in FIG. 1) perpendicular
to the six display screens absorbed by the dielectric 30. A movable membrane, shown at 40, is
provided to allow freedom. FIG. 2 shows that the flat speaker 20 is curved to improve the sound
quality while increasing the speaker output. 100 is a space formed between the speaker 20 and
the dielectric 30. FIG. 3 shows that a large number of curves of the flat speaker are provided in
the plane in FIG.
In FIG. 4, the dielectric is an example of using a solid 60 such as vinyl, and in order to facilitate
expansion and contraction in the direction perpendicular to the display surface, the open
network structure of only six 65 of the light emitting element 50 is used. If the display element
and the dielectric network structure have the same period (pitch) as shown in FIG. 1, the network
structure of the dielectric will not be noticeable and the display image quality will not be
degraded. FIG. 5 shows the dielectric 70 in a dot shape. This is also an example when the period
matches with the light emitting element. Alternatively, the dielectric 70 may be formed in a dot
shape on the light emitting insulator. It is preferable that these dielectrics be rich in elasticity
that absorbs vibrations from flat speakers well. These dielectrics can be colored in black or the
like to increase the display contrast. FIG. 6 shows an example in which four flat speakers 21, 22,
23 ° 24 are provided. The sound of the left and right, upper tools is emitted, so the stereo effect
increases the sense of reality. FIG. 7 shows an arrangement in which a transparent electrode
which is a part of a flat speaker is provided on a flat plate of a flat TV display device and the flat
TV and the flat speaker are integrated 0 in FIG. And a transparent electrode 230 provided on the
outer side of the flat display device. 24o is an organic piezoelectric element, and 250 is a
protective film. Although FIG. 6 shows an example in which four flat speakers are provided, the
number of flat speakers may be further increased, and the operated speakers may be changed
according to the image to be displayed. In this way, for example, when the car crosses the screen,
the speakers that emit the sound can also be switched one after another in accordance with the
movement of the car to increase the sound presence. In this case, the movement of the car is
from the image signal. Alternatively, when the received audio signal is stereo, it can be detected
from the intensity ratio of the signals entering the left and right speakers. According to the
present invention, by mounting the translucent flat speaker on the display surface of the flat
television display device, the volume and area of the television device itself are reduced, and
sound is output from the image. It has effects such as increasing the sense of reality. Further, by
inserting a transparent dielectric as a vibration absorber between the flat display device and the
translucent flat speaker, the vibration to the flat display device is prevented, and the life and
reliability of the flat display device are impaired. There is an effect that there is no
Brief description of the drawings
1 is a cross-sectional view of a flat display device with a light-transmissive flat speaker, FIG. 2 is a
cross-sectional view of the flat speaker having a curve, and FIG. 3 is a cross-sectional view of the
flat speaker having a large number of curves, 5 shows a mesh-like dielectric, FIG. 5 shows a dotlike dielectric, FIG. 6 shows four flat speakers, and FIG. 7 shows a light emitting electrode on a
face plate of a flat television display device. FIG. 6 is a cross-sectional view showing a flat
television display device and a flat speaker integrally.
10: Flat display device 20: Translucent flat speaker. 30: dielectric, 50: light emitting element, 6 o:
network dielectric, 70: dot dielectric.茅 1 芽 2 茅 3 茅 図 5 5 5 6 第 7
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