JP4355860B2 - Image display module - Google Patents

Description

  The present invention relates to a flat image display module having a speaker device.

  2. Description of the Related Art In recent years, flat image display panels (hereinafter referred to as FPD (Flat Panel Display)) that are convenient for miniaturization and thinning, such as liquid crystal display panels and organic EL displays, are frequently used as displays for mobile devices such as mobile phones.

  On the other hand, a mobile phone is progressing as a multi-function device having functions such as a TV and a PDA (Personal Data Assistants) from a simple phone. As a display used for such a mobile device, not only displays an image, It is required to have a speaker function that emits sound.

As an example of an FDP of a mobile device provided with a speaker, a vehicle-mounted liquid crystal display panel as disclosed in Patent Document 1 is known.
Japanese Patent Laid-Open No. 62-231847

  In the above-described in-vehicle liquid crystal display panel, a video display and a speaker are arranged in parallel on the front surface of the device. If the speakers are arranged in parallel on the video display on the front side of the device in this way, the area of the entire device increases, which goes against the demand for downsizing, and mobile devices that require both thinness and downsizing like mobile phones. Not suitable as a device display.

  The objective of this invention is providing the image display module with a speaker reduced in size and thickness.

The present invention is arranged such that a backlight unit that irradiates light to the display panel is interposed between the display panel, a sound source element that emits sound waves by a piezoelectric ceramic plate, and a sound wave emitted from the sound source elements . A space as a sound guide path leading in the direction has a side wall portion formed between the side surface of the display panel or the side surface of the backlight unit, and the sound source element is disposed between the bottom plate portion and the backlight unit. A housing for accommodating the display panel, the backlight unit, and the sound source element so as to be positioned, and the sound source element includes a C-shaped spacer having an opening formed in a part of the ring. The C-shaped spacer is disposed between the piezoelectric ceramic plate and the backlight unit, and the opening is directed toward the sound guide path. And it is characterized in that it is disposed.
Further, the present invention provides a sound source element that emits sound waves by a piezoelectric ceramic plate, and a case that houses the display panel and the sound source element so that the sound source element is positioned between the bottom plate portion and the display panel. The case includes a side wall portion formed between a side surface of the display panel and a space as a sound guide path for guiding a sound wave emitted from the sound source element in a predetermined direction. A C-shaped spacer having an opening formed in a part thereof, the C-shaped spacer being disposed between the piezoelectric ceramic plate and the display panel and the opening being the sound guide It is arranged so as to face the direction of the road.
In addition, the present invention provides a first sound source element that emits sound waves by a first piezoelectric ceramic plate, a second sound source element that emits sound waves by a second piezoelectric ceramic plate, and a gap between the bottom plate portion and the display panel. A housing for housing the display panel, the first sound source element, and the second sound source element so that the first sound source element and the second sound source element are positioned; A first side wall portion in which a space as a first sound guide path for guiding a sound wave emitted from the first sound source element in a predetermined direction is formed between the first side surface and the second side surface of the display panel; A space as a second sound guide path for guiding a sound wave emitted from the sound source element in a predetermined direction, and a second side wall portion formed between the second side surface of the display panel, and The first sound source element has a first opening formed in a part of the ring. A first C-shaped spacer having a shape formed, and the second sound source element has a second C-shaped spacer having a shape in which a second opening is formed in a part of the ring, The first C-shaped spacer is disposed between the first piezoelectric ceramic plate and the display panel, and is disposed so that the first opening is directed toward the first sound guide path. The second C-shaped spacer is disposed between the second piezoelectric ceramic plate and the display panel, and the second opening is directed toward the second sound guide path. It is characterized by being arranged.
In addition, the present invention includes a sound source element that emits sound waves by a diaphragm, and a case that houses the display panel and the sound source element so that the sound source element is positioned between the bottom plate portion and the display panel. The case has a side wall portion formed between a side surface of the display panel and a space as a sound guide path for guiding a sound wave emitted from the sound source element in a predetermined direction. A spacer having a shape in which a notch portion is formed in part, the spacer being disposed between the diaphragm and the display panel, and the notch portion being directed toward the sound guide path; It is characterized by being arranged.
In addition, the present invention provides a first sound source element that emits a sound wave by a diaphragm, a second sound source element that emits a sound wave by a diaphragm, and the first sound source element and the first sound source between a bottom plate portion and a display panel. A case housing the display panel, the first sound source element, and the second sound source element so that two sound source elements are positioned, and the case is emitted from the first sound source element. A sound wave emitted from the first sound source element and the first side wall portion formed between the first side surface of the display panel and a space as a first sound guide path for guiding the sound wave in a predetermined direction. A space as a second sound guide path leading in a predetermined direction has a second side wall portion formed between the second side surface of the display panel, and the first sound source element includes a frame A first spacer having a shape in which a first notch is formed in a part of the first spacer, The sound source element includes a second spacer having a shape in which a second notch is formed in a part of a frame, and the first spacer is between the first diaphragm and the display panel. And the first notch is disposed in the direction of the first sound guide path, and the second spacer is disposed between the second diaphragm and the display panel. It is arrange | positioned and it arrange | positions so that the said 2nd notch part may face the direction of a said 2nd sound guide path, It is characterized by the above-mentioned.

  A liquid crystal display module according to a second aspect of the present invention includes a flat image display panel, two sound source elements installed on the back side opposite to the observation side of the display of the image display panel, It has two sound guide paths for guiding two sound waves emitted from the two sound source elements to the observation side of the display.

According to the present invention, the area of the entire device can be reduced and made thinner.

(First embodiment)
FIG. 1 is a perspective view showing a liquid crystal display module as a first embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II, and FIG. 3 is an exploded perspective view thereof.

  As shown in FIG. 3, the liquid crystal display module of the present embodiment is generally composed of a liquid crystal display unit 1, a backlight unit 2, a sound source unit 3, and an exterior case 4.

  The liquid crystal display unit 1 includes a panel case 11 and a liquid crystal display panel 12 accommodated in the panel case 11. As shown in FIG. 2, the liquid crystal display panel 12 includes a pair of rectangular glass substrates 121 and 122 on which electrodes (not shown) are formed, and a frame-shaped sealing material (not shown) with the electrode forming surfaces facing each other. The liquid crystal (not shown) is sealed between the glass substrates 121 and 122 surrounded by the frame-shaped sealing material. The panel case 11 is provided with a window 111 for observing the display. The liquid crystal display panel 12 is electrically connected to a flexible wiring board 13 that supplies a control signal voltage for driving liquid crystal from an external drive control circuit.

  On the back side opposite to the display side of the display of the liquid crystal display unit 1, a backlight unit 2 is installed. The backlight unit 2 includes a light guide plate 21 formed of a substantially transparent rectangular plate, and an LED (Light-Emitting Diode) 22 as a point light source element disposed to face one end surface (light incident end surface) of the light guide plate 21. The circuit board 23 on which the power supply wiring circuit for the LED 22 is formed, the optical sheet laminate 24 arranged on the light emitting surface of the light guide plate 21 (the front surface facing the liquid crystal display panel 12), and the rear surface of the light guide plate 21. The light reflecting sheet 25 and the like are configured. In the present embodiment, three LEDs 22 are disposed to be evenly opposed to the light incident end face of the light guide plate 21, and these three LEDs 22 are directly mounted on the circuit board 23. In addition, as shown in FIG. 2, the optical sheet laminate 24 includes two prism sheets 241 and 242 that align the light emission direction and a light diffusion sheet 243 that are sequentially stacked on the light emission surface of the light guide plate 21. It becomes.

  A sound source unit 3 as a sound source element is installed on the back side of the backlight unit 2. The sound source unit 3 includes a piezoelectric vibration element that constitutes a vibration element. Specifically, the sound source unit 3 includes a disk-shaped piezoelectric ceramic plate 31 and a pair of strip-shaped thin film electrodes 32a and 32b that are conductively attached to both surfaces thereof, and a piezoelectric element. A “C” -shaped first spacer 33 (hereinafter referred to as a C-shaped spacer) having a notch interposed between the ceramic plate 31 and the backlight unit 2, and interposed between the piezoelectric ceramic plate 31 and the outer case 4. A circular second spacer 34 (hereinafter referred to as a circular spacer), and a flexible wiring for sound source signal input in which wiring for applying a sound source signal voltage to the piezoelectric ceramic plate 31 via the thin film electrodes 32a and 32b is formed. It consists of a substrate 35.

  Here, each of the C-shaped spacer 33 and the circular spacer 34 is formed of a cushioning material such as urethane foam, and elastically holds the peripheral portion of the sound source element, and has the following first to third effects. Intervened to get.

  First, it acts as a spacer for sufficiently securing and supporting a gap larger than the amplitude when the piezoelectric ceramic plate 31 vibrates, and has the effect of freely vibrating the piezoelectric ceramic plate 31 with a large amplitude. . Accordingly, the spacers 33 and 34 are formed in a size capable of supporting the peripheral edge of the piezoelectric ceramic plate 31.

  Second, it acts as a cushioning material to prevent the vibration of the piezoelectric ceramic plate 31 from being transmitted to other members. In particular, in the case of the liquid crystal display module as in the present embodiment, there is an effect of preventing vibration from being transmitted to the liquid crystal display panel 12 to cause display defects.

  Third, the piezoelectric ceramic plate 31 vibrates to prevent interference between sound waves generated from both surfaces thereof, and also acts as a partition for forming a sound guide path. That is, the circular spacer 34 installed on the rear surface of the piezoelectric ceramic plate 31 (the surface facing the exterior case 4) is formed in a closed circle surrounding the rear surface of the piezoelectric ceramic plate 31 over the entire circumference. The sound wave generated from the rear surface is prevented from propagating to the front side (the surface facing the backlight unit 2), and is emitted to the rear side. The C-shaped spacer 33 installed on the front surface of the piezoelectric ceramic plate 31 is installed with its opening 331 facing in the direction in which sound waves generated from the front surface of the piezoelectric ceramic plate 31 should propagate. As will be described later, the opening 331 of the C-shaped spacer 33 communicates with a sound guide path formed by a space formed between the image display panel and the exterior case 4. Sound waves generated from the front surface are emitted from the opening 311 to the sound guide path without interfering with sound waves generated from the rear surface, and clear sound can be obtained.

  The sound source signal input flexible wiring board 35 is formed by using an insulating resin film such as a polyimide film as a base film 351, and two wirings 352 and 353 are formed on one surface of the base film 351 by patterning copper foil by photolithography. ing. Connection terminals 352a and 352b and connection terminals 353a and 353b are formed at both ends of each wiring 352 and 353, respectively. Each of the connection terminals 352a and 353a of the wirings 352 and 353 is solder-bonded to the other end portions of the pair of thin film electrodes 32a and 32b whose one end portions are conductively bonded to both surfaces of the piezoelectric ceramic plate 31, respectively. The The sound source signal input flexible wiring board 35 is disposed on the back side in such a manner that the wiring forming surface faces the backlight unit 2.

  The liquid crystal display unit 1, the backlight unit 2, and the sound source unit 3 described above are housed in an outer case 4. The exterior case 4 of the present embodiment is obtained by processing a sheet metal material, and is formed in a rectangular box shape with an open top surface having a planar outer shape that can fit and store the liquid crystal display unit 1 and the backlight unit 2. A rectangular recess 411 extending over the entire length in the longitudinal direction is formed at the center of the bottom plate 41 of the exterior case 4. The sound source unit 3 is housed and mounted in the recess 411. In the present embodiment, five pores 412 are drilled at one end of the recess 411 in a cross arrangement. These pores 412 are formed in an area facing the piezoelectric ceramic plate 31 of the sound source unit 3 to be mounted so as to quickly dissipate unnecessary sound waves emitted from the rear surface of the piezoelectric ceramic plate 31 to the outside of the outer case 4. Is provided. As a result, unnecessary sound waves can escape to the space outside the outer case 4 (the surplus space of the module installation space in the application device) and be absorbed and attenuated. As a result, the sound emitted from the sound source unit 3 becomes clearer.

  A convex portion 421 for projecting from the side surface of the image display panel and forming a sound guide path for guiding sound waves is formed on one side wall 42 orthogonal to the extending direction of the concave portion 411 among the four side walls of the outer case 4. The convex portion 421 is formed of a projecting wall that forms an elongated rectangular space projecting along the side surface of the image display panel. The convex portion 421 is provided so as to correspond to one end portion of the concave portion 411 of the bottom plate 41. The sound source unit 3 is attached to an end portion of the concave portion 411 corresponding to the side wall convex portion 421, and the opening 331 of the C-shaped spacer 33 opens toward the convex portion 421 of the side wall 42.

  Note that two openings 431 and 432 are respectively formed over a predetermined length in one side plate 43 of the pair of longitudinal side plates. The openings 431 and 432 are openings for drawing out the flexible wiring board 13 bonded to the liquid crystal display panel 11 and the sound source signal input flexible wiring board 35 of the sound source unit 3 to the outside of the outer case 4.

  As shown in FIG. 2, the sound source unit 3 is attached to the outer case 4 formed as described above. In this case, the surface of the base film 351 of the sound source signal input flexible wiring board 35 on which the wirings 352 and 353 are not formed is arranged toward the bottom plate 41 of the exterior case 4. As a result, the connection terminals 352a, 353a and the like that are not insulated among the wirings 352, 353 leak to the exterior case 4 formed of a conductive sheet metal material, and the connection terminals 352a, 353a are short-circuited. Is preventing.

  In the exterior case 4 to which the sound source unit 2 is mounted, the backlight unit 2 and the liquid crystal display unit 1 are sequentially fitted and housed. In this state, the sound guide path 5 is surrounded by the convex portion 421 of the side plate 42 and the corresponding end surfaces of the backlight unit 2 and the liquid crystal display unit 1 accommodated therein. The sound guide path 5 is provided to guide sound waves emitted from the front surface of the piezoelectric ceramic plate 31 when the piezoelectric ceramic plate 31 vibrates from the opening 331 of the spacer 33 to the front surface (display surface) side of the liquid crystal display panel 11. Therefore, sound waves emitted from the front surface of the piezoelectric ceramic plate 31 that vibrate according to the input signal voltage travel from the opening 331 of the spacer 33 into the sound guide path 5 and propagate through the sound guide path 5. Is emitted to the display surface (front surface) side of the liquid crystal display panel 11. As a result, the viewer of the present liquid crystal display module can observe the video displayed on the liquid crystal display panel 11 and listen to clear sound related thereto.

  As described above, in the liquid crystal display module of the present embodiment, the sound source unit 3 is installed so as to overlap the back surface (rear surface) side of the liquid crystal display unit 1, and the sound wave emitted from the sound source unit 3 is transmitted to the front side of the liquid crystal display unit 1. Since the sound guide path 5 leading to the side of the module is formed on the side surface of the module, an increase in the area of the entire liquid crystal display module due to the provision of sound generation means, that is, a speaker, can be suppressed. As a result, the speaker-equipped liquid crystal display module can be reduced in size and thickness to such an extent that, for example, a cellular phone can be applied.

  In the sound source unit 3, C-shaped spacers 33 and circular spacers 34 formed of a buffer material are installed on both surfaces of the piezoelectric ceramic plate 31, and the C-shaped spacers of the sound waves emitted from both surfaces of the piezoelectric ceramic plate 31. Since the sound wave emitted from the surface where 33 is installed is selectively emitted from the spacer opening 331 to the module front side via the sound guide path 5, a clear sound can be obtained.

  Further, the outer case 4 is formed with the pores 412 so that unnecessary sound waves emitted from the surface of the piezoelectric ceramic plate 31 where the circular spacers 34 are installed are released from the pores 412 to the space outside the module and absorbed and extinguished. Therefore, a clearer voice can be obtained.

  Furthermore, since the surface opposite to the wiring formation surface of the flexible wiring board 35 for sound source signal input is arranged toward the exterior case 4, wiring exposed portions such as the connection terminals 352a and 353a of the wirings 352 and 353 are provided. Can be prevented from leaking to the outer case 4 formed of a conductive metal plate, and a short circuit between the connection terminals 352a and 353a can be prevented, thereby improving the reliability of the display module.

  In addition, since the sound guide path 5 is formed by surrounding the outer case side plate 42 and the side end surfaces of the liquid crystal display unit 1 and the backlight unit 2 without using a dedicated member, an increase in the number of parts is suppressed, and Since the sound source unit 3 is housed and integrated with the liquid crystal display unit 1 or the backlight unit 2 in one exterior case 4, it is very easy to design a component arrangement in a device in which the liquid crystal display module is mounted. The mounting and assembling work is also simplified and contributes to the reduction of manufacturing man-hours. As a result, the cost reduction of the flat liquid crystal display module of the present embodiment is remarkably promoted.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected about the component same as the said embodiment, and the description is abbreviate | omitted.

  As shown in FIG. 4, the liquid crystal display module of the present embodiment is a stereo sound type liquid crystal display module including a pair of sound source units 3 and 6. That is, in addition to the sound source unit 3 provided in the liquid crystal display module of the above embodiment, the sound source unit 6 having substantially the same configuration is divided into two in the longitudinal direction (left and right direction of the screen) of the display surface of the liquid crystal display module. They are arranged symmetrically with respect to the line.

  In this case, the piezoelectric ceramic plate 61 to which the pair of electrodes 62a and 62b having the same configuration is conductively attached corresponding to the piezoelectric ceramic plate 31 to which the pair of electrodes 32a and 32b is conductively attached is the C-shaped spacer 33, circular shape. A C-shaped spacer 63 and a circular spacer 64 having the same configuration corresponding to the spacer 34 are arranged symmetrically with respect to the center line. The pair of electrodes 32a and 32b and the pair of electrodes 62a and 62b of each of the piezoelectric ceramic plates 31 and 61 are connected to the conductive pattern of the common flexible wiring board 65 on which the corresponding conductive pattern is formed.

  The exterior case 7 has unnecessary sound wave escape holes grouped in a cross section in the recesses 711 of the bottom plate 71 at the left and right symmetrical positions, respectively, and each of the pair of short side plates 72 and 72 constitutes a sound guide path. Protrusions 721 and 721 are symmetrically formed, and the longitudinal side plate 73 has a control signal input flexible wiring substrate 13 and a sound source signal input flexible wiring substrate 65 on the liquid crystal display unit 1 in the same manner as the above embodiment. Each of the openings 731 and 732 is provided one by one for drawing out the outside of the case 7. As a result, as shown in FIG. 5, a stereo sound type liquid crystal display module with a speaker having a pair of sound guide paths 8 and 9 on the left and right of the module display surface is obtained.

  According to the flat-type liquid crystal display module of the present modification configured as described above, the device including the speaker having excellent reliability and clear sound can be downsized and thinned. In addition to the same effect, there is an effect that the sound can be heard clearly in stereo.

In addition, this invention is not limited to said embodiment.
In the above embodiment, the sound source units 3 and 6 include the disk-shaped piezoelectric ceramic plates 31 and 61 and the pair of strip-shaped thin film electrodes 32a, 32b, 62a, and 62b that are conductively attached to both surfaces thereof. Although an example using a sound source element has been shown, the present invention is not limited to this, and the sound source element 10 formed of a piezoelectric vibrator having a piezoelectric element attached to at least one surface of a film serving as a diaphragm may be used. That is, as shown in FIG. 6, a piezoelectric vibrator in which a piezoelectric element 101 having a smaller diameter than the diaphragm 102 is attached to one or both of the circular diaphragms 102 made of resin or metal is used. Then, a C-shaped spacer 103 and a circular spacer 104 are arranged outside the outer shape of the piezoelectric element 101 of the diaphragm 102, and the sound source element 10 is fixed to the cases 4 and 7. According to this configuration, a vibration with a large amplitude can be obtained by the diaphragm, and a sound with a stronger sound pressure can be generated.

  In the embodiment, the sound source element and the backlight unit, and the spacer disposed between the sound source element and the image display panel among the spacers disposed between the sound source element and the case, communicate with the sound guide path. However, the present invention is not limited to this, and a spacer disposed between the sound source element and the case may be provided with a notch for communicating with the sound guide path. You may provide the said notch in both the sound source element and a backlight unit, and the spacer respectively arrange | positioned between a sound source element and a case. In this case, it is preferable to further provide a space for inverting the phase of the sound wave between the sound source element and the case.

  Furthermore, in the above-described embodiment, the exterior cases 4 and 7 are formed by processing a sheet metal material of a conductor. However, the present invention is not limited to this, and the exterior case may be molded using an insulating resin material. In this case, since the outer case becomes an insulator, there is no short circuit between the terminals of the flexible wiring board for sound source signal input, so the electrode forming surface of the insulating base film on the flexible wiring board is placed facing the case. It is also possible to obtain the advantage of increasing the degree of freedom in designing and arranging the flexible wiring board.

  In addition, the present invention is not limited to a liquid crystal display module with a backlight, but can be widely applied to other various flat image display modules such as a reflective liquid crystal display module, an organic EL (Electro Luminescence) display, and a plasma display. Of course.

It is a perspective view which shows the liquid crystal display module as 1st Embodiment of this invention. It is typical sectional drawing which cut | disconnects and shows the said liquid crystal display module by the II-II line | wire of FIG. It is a disassembled perspective view of the said liquid crystal display module. It is a disassembled perspective view which shows the liquid crystal display module as 2nd Embodiment of this invention. It is a perspective view which shows the liquid crystal display module as the said 2nd Embodiment. It is a disassembled perspective view which shows the modification of a sound source element.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display unit 11 Panel case 111 Display window 12 Liquid crystal display panel 121,122 Glass substrate 13 Flexible wiring board 2 Backlight unit 21 Light guide plate 22 LED
24 Optical sheet laminate 25 Light reflecting sheet 3, 6 Sound source units 31, 61 Piezoelectric ceramic plates 32a, 32b
62a, 62b Thin-film electrodes 33, 63, 103 C-shaped spacers 34, 64, 104 Circular spacers 35, 65 Flexible wiring boards 4 and 7 for sound source signal input Outer case 41 Bottom plate 411 Recess 412 Small pore 42 Side plate 421 Protrusion 5, 8 Sound guide path 10 Sound source element 101 Piezoelectric element 102 Diaphragm

Claims (15)

A backlight unit that emits light to the display panel is disposed so as to be interposed between the display panel and a sound source element that emits sound waves by a piezoelectric ceramic plate ;
A space as a sound guide path for guiding sound waves emitted from the sound source element in a predetermined direction has a side wall portion formed between the side surface of the display panel or the side surface of the backlight unit, and the bottom plate portion and the back surface A case for housing the display panel, the backlight unit, and the sound source element so that the sound source element is positioned between the light unit;
With
The sound source element has a C-shaped spacer having an opening formed in a part of the ring,
The C-shaped spacer is disposed between the piezoelectric ceramic plate and the backlight unit, and is disposed so that the opening faces the direction of the sound guide path. . The image display module according to claim 1, wherein the C-shaped spacer is disposed so that the opening portion overlaps the display panel or the backlight unit. The C-shaped spacer is disposed so that at least a part of one main surface is in close contact with the backlight unit, and is disposed so that at least a part of the other main surface is in close contact with the piezoelectric ceramic plate. The image display module according to claim 1, wherein the image display module is provided. The backlight unit includes an LED as a light emission source, a light guide plate that guides light from the LED incident from an end surface, and a light reflecting member that is disposed to face the light guide plate.
The image display module according to claim 3, wherein at least a part of the one main surface of the C-shaped spacer is disposed so as to be in close contact with the light reflecting member. The sound source element has a ring-shaped circular spacer,
The image display module according to claim 1, wherein the circular spacer is disposed between the piezoelectric ceramic plate and the bottom plate portion of the case. The circular spacer is disposed so that at least part of one main surface is in close contact with the piezoelectric ceramic plate, and is disposed so that at least part of the other main surface is in close contact with the bottom plate portion of the case. The image display module according to claim 5, wherein the image display module is provided. The image display module according to claim 5, wherein a plurality of holes are formed in the bottom plate portion corresponding to the region surrounded by the circular spacer. A sound source element that emits sound waves by a piezoelectric ceramic plate;
A case for housing the display panel and the sound source element such that the sound source element is located between the bottom plate portion and the display panel;
With
The case has a side wall portion that is formed between a side surface of the display panel and a space as a sound guide path that guides a sound wave emitted from the sound source element in a predetermined direction.
The sound source element has a C-shaped spacer having an opening formed in a part of the ring,
The C-shaped spacer is disposed between the piezoelectric ceramic plate and the display panel, and is disposed so that the opening is directed in the direction of the sound guide path. The sound source element has a ring-shaped circular spacer,
The circular spacer is disposed between the piezoelectric ceramic plate and the bottom plate portion of the case so that at least part of one main surface is in close contact with the piezoelectric ceramic plate and at least part of the other main surface is The image display module according to claim 8, wherein the image display module is disposed in close contact with the bottom plate portion of the case. A first sound source element that emits a sound wave by a first piezoelectric ceramic plate;
A second sound source element that emits sound waves by a second piezoelectric ceramic plate;
A case for housing the display panel, the first sound source element, and the second sound source element so that the first sound source element and the second sound source element are positioned between the bottom plate portion and the display panel. When,
With
The case has a first side wall portion in which a space as a first sound guide path for guiding a sound wave emitted from the first sound source element in a predetermined direction is formed between the first side surface of the display panel. And a second side wall portion in which a space as a second sound guide path for guiding a sound wave emitted from the second sound source element in a predetermined direction is formed between the second side surface of the display panel, Have
The first sound source element has a first C-shaped spacer having a shape in which a first opening is formed in a part of a ring,
The second sound source element has a second C-shaped spacer having a shape in which a second opening is formed in a part of the ring,
The first C-shaped spacer is disposed between the first piezoelectric ceramic plate and the display panel, and is disposed so that the first opening is directed toward the first sound guide path. And
The second C-shaped spacer is disposed between the second piezoelectric ceramic plate and the display panel, and is disposed so that the second opening is directed toward the second sound guide path. An image display module characterized in that The first sound source element is disposed on the first sound guide path side with respect to the second sound source element,
The image display module according to claim 10, wherein the second sound source element is disposed on the second sound guide path side with respect to the first sound source element. The first sound source element has a ring-shaped first circular spacer;
The second sound source element has a ring-shaped second circular spacer,
The first circular spacer is disposed between the first piezoelectric ceramic plate and the bottom plate portion of the case so that at least a part of one main surface is in close contact with the first piezoelectric ceramic plate and the other Is arranged so that at least a part of the main surface of the case is in close contact with the bottom plate portion in the case,
The second circular spacer is disposed between the second piezoelectric ceramic plate and the bottom plate portion of the case so that at least a part of one main surface is in close contact with the second piezoelectric ceramic plate and the other The image display module according to claim 9, wherein at least a part of the main surface of the image display module is disposed so as to be in close contact with the bottom plate portion of the case. The image display module according to claim 10, wherein the first sound source element and the second sound source element are arranged so as to be bilaterally symmetric. A sound source element that emits sound waves by a diaphragm,
A case for housing the display panel and the sound source element such that the sound source element is located between the bottom plate portion and the display panel;
With
The case has a side wall portion that is formed between a side surface of the display panel and a space as a sound guide path that guides a sound wave emitted from the sound source element in a predetermined direction.
The sound source element has a spacer having a shape in which a notch is formed in a part of the frame,
The image display module, wherein the spacer is disposed between the diaphragm and the display panel, and is disposed such that the cutout portion faces a direction of the sound guide path. A first sound source element that emits sound waves by a diaphragm;
A second sound source element that emits sound waves by a diaphragm;
A case for housing the display panel, the first sound source element, and the second sound source element so that the first sound source element and the second sound source element are positioned between the bottom plate portion and the display panel. When,
With
In the case, a first side wall portion in which a space as a first sound guide path for guiding a sound wave emitted from the first sound source element in a predetermined direction is formed between the first side surface of the display panel and the case. And a second side wall portion in which a space as a second sound guide path for guiding a sound wave emitted from the second sound source element in a predetermined direction is formed between the second side surface of the display panel, Have
The first sound source element has a first spacer having a shape in which a first notch is formed in a part of a frame;
The second sound source element has a second spacer having a shape in which a second notch is formed in a part of the frame,
The first spacer is disposed between the first diaphragm and the display panel, and the first notch is disposed so as to face the first sound guide path.
The second spacer is disposed between the second diaphragm and the display panel, and is disposed so that the second cutout portion faces the second sound guide path. An image display module characterized by that.

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