JP2007256571A - Electrooptical apparatus and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrooptical apparatus which fully satisfy demand of downsizing electronic equipment by reducing an area of a display peripheral section, which is required for arrangement of sound releasing holes and sound guide paths. <P>SOLUTION: The electrooptical apparatus 1A comprises: the display section 2 including a display region 6a; and sounding bodies 21 and 22. The sounding bodies 21 and 22 includes: speakers 3a and 3b in which the sounding bodies 21 and 22 are arranged so as to overlap with the display region 6a on a plane view; air chambers 8a and 8b coming in surface contact with the speakers 3a and 3b; the plurality of sound releasing holes 10a and 10b which are arranged in the peripheral section 4a located outside the plane view of the display region 6a; and the sound guide paths 9a and 9b branched in multiple number, which connect through each of the sound releasing holes 10a and 10b, and the air chambers 8a and 8b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electro-optical device including a display unit and a plurality of sounding bodies, and an electronic apparatus including the electro-optical device.

  2. Description of the Related Art In recent years, electro-optical devices such as liquid crystal display devices are widely used as display devices for displaying various types of information related to electronic devices as images in electronic devices such as mobile phones and portable information terminals. The electro-optical device is a device that controls an optical output state by an electric input, and examples thereof include a liquid crystal display device, an EL (Electro Luminescence) device, and a plasma display device.

The electronic device is also provided with means for generating sound. For example, in a cellular phone, it is necessary to express what the other party speaks by voice, and a sounding body such as a speaker is provided as a means for generating sound.
An electronic apparatus including both an electro-optical device and a sounding body is conventionally known (see, for example, Patent Document 1 and Patent Document 2).
In recent years, there has been an increasing demand for downsizing electronic devices.
JP2003-078601A JP 2003-158787 A

  However, in a conventional electronic apparatus including both an electro-optical device and a sounding body, it is necessary to secure a wide area around the display unit of the electro-optical device in order to arrange the sounding body. Since the area could not be reduced, the demand for miniaturization could not be sufficiently met.

The present invention has been made in order to solve the above-described problems, and can reduce the area around the display unit necessary for arranging the sounding body and sufficiently meet the demand for downsizing of electronic devices. An object of the present invention is to provide an electro-optical device that can be used.
It is another object of the present invention to provide a small electronic apparatus including the above electro-optical device.

  In order to achieve the above object, it is conceivable to reduce the size of the sounding body and to reduce the area around the display unit necessary for the placement of the sounding body. However, if the size of the sounding body is reduced, the sound volume generated by the sounding body becomes insufficient and the sound volume is lowered. In order to solve this problem, the inventor has found that the speaker and the display unit are arranged so as to overlap when viewed in plan. In this case, the area around the display unit can be reduced while sufficiently securing the size of the speaker. However, even in this case, it is necessary to secure a large area around the display unit in order to arrange a sound guide path and sound emission holes for emitting the sound generated in the speaker to the outside. I can't respond enough.

In order to solve this problem, it is conceivable to reduce the size of the sound emission hole. However, if the size of the sound emission hole is reduced, the sound generated by the speaker cannot be released sufficiently, and the volume generated by the sounding body is reduced even if the speaker can generate a sufficient volume. And become insufficient.
In order to ensure the opening area of the sound emission hole, it is also conceivable to provide a plurality of small sound emission holes in one provided with one sound guide path. However, since the sound emission hole is an opening of the sound guide path, it must be provided in a portion overlapping the sound guide path when the area around the display unit is viewed in plan. For this reason, even if the number of sound emitting holes is reduced to a plurality, the sound emitting holes may not be properly arranged so that the area of the peripheral region is narrowed. could not.

  The present inventor has conducted extensive research and arranged the speaker and the display area so as to overlap when viewed in plan, and includes a plurality of sound emission holes and a plurality of sound emission holes communicating with the air chamber. And an electro-optical device and an electronic apparatus according to the present invention. The electro-optical device and the electronic apparatus according to the present invention were found to be able to reduce the area around the display unit necessary for arranging the sounding body.

  The electro-optical device of the present invention includes a display unit having a display area and a sounding body, and the sounding body is disposed so as to overlap the display area when viewed in plan, and faces the speaker. The air chambers in contact with each other, a plurality of sound emitting holes arranged in a peripheral region located outside the display region in plan view, and a plurality of sound emitting holes branched into a plurality of communicating air chambers with each of the sound emitting holes And a sound guide path.

In the electro-optical device according to the present invention, the speaker is arranged so as to overlap the display area when viewed in plan, so that the display area and the speaker are not overlapped when viewed in plan. Thus, the area of the peripheral area necessary for the arrangement of the sound generators can be reduced.
In addition, in the electro-optical device of the present invention, each sound emitting hole is provided while ensuring the opening area of the sound emitting hole because each sound emitting hole and a plurality of sound guide paths communicating with each sound emitting hole are provided. Can be reduced in size. In addition, since the sounding body includes a plurality of sound emitting holes arranged in the peripheral region, and a plurality of sound guiding paths that communicate with each of the plurality of sound emitting holes and the air chamber, each sound emitting hole And the branched portion of the sound guide path communicating with each sound emitting hole can be regarded as one set, and one set can be appropriately arranged so that the area of the peripheral region is narrowed. Therefore, the arrangement of the sound emission holes is not determined by the arrangement of the sound guide paths, and the sound emission holes can be appropriately arranged so that the area of the peripheral region is reduced. Therefore, compared with the case where a predetermined opening area is ensured by one sound emitting hole and sound guiding path, the area of the peripheral region necessary for arranging the sound emitting hole and sound guiding path can be reduced.

In the electro-optical device, the plurality of sound emitting holes may be arranged in a line along the outer edge of the display area.
By setting it as such an electro-optical apparatus, the area of the peripheral region required in order to arrange | position a sound emission hole and a sound-conduction path can be narrowed still more effectively.

In the electro-optical device, the display area may be a rectangle, and the plurality of sound emitting holes may be arranged along one side of the rectangle.
In such an electro-optical device, since the plurality of sound emitting holes are all arranged along one side of the rectangle, the plurality of sound emitting holes are arranged along two or more sides of the rectangle. In comparison, the area of the peripheral region necessary for arranging the sound emission holes and the sound guide paths can be reduced.

In the above electro-optical device, a plurality of the sounding bodies may be provided.
Such an electro-optical device includes a sounding body with excellent sound quality that can simultaneously generate a plurality of sounds.

In the above electro-optical device, the plurality of speakers constituting the plurality of sounding bodies may be arranged side by side so as not to overlap each other when viewed in plan.
Such an electro-optical device has a smaller thickness than a plurality of speakers arranged so as to overlap each other when viewed in plan.

In the electro-optical device described above, the plurality of speakers constituting the plurality of sounding bodies may be arranged so that at least a part thereof overlaps each other when viewed in plan.
Such an electro-optical device is much smaller than a device in which a plurality of speakers are arranged so as not to overlap each other when viewed in plan.

In the electro-optical device, the display area is rectangular, the plurality of sound generators are divided into a first group and a second group, and the sound emitting members of the sound generators constituting the first group are emitted. All the holes are arranged along one side of the rectangle, and the plurality of sound emitting holes of the sound generator constituting the second group are all arranged along the side facing the one side of the rectangle; can do.
In such an electro-optical device, a sound generator capable of generating a plurality of sounds at the same time is provided, and a sufficient distance between the sound emission holes of the first group and the sound emission holes of the second group is ensured. Therefore, a stereophonic effect is high and a sounding body with excellent sound quality is provided. In addition, since the plurality of sound emitting holes are arranged on two opposite sides of the rectangle, compared to the case where the plurality of sound emitting holes are arranged along three or more sides of the rectangle, The area of the peripheral area necessary for arranging the sound emission holes and the sound guide paths can be effectively reduced.

In the electro-optical device, the size of the sound emitting hole may be shorter in the direction perpendicular to the direction along the outer edge of the display area than in the direction along the outer edge of the display area. .
In such an electro-optical device, when the area of the sound emitting hole is the same, the size of the sound emitting hole is more perpendicular to the direction along the outer edge of the display area than in the direction along the outer edge of the display area. Compared with the longer one or the same one, the area of the peripheral region necessary for arranging the sound emission holes can be reduced.

In order to achieve the above object, an electronic apparatus according to the present invention includes any one of the above electro-optical devices.
By setting it as such an electronic device, a small electronic device is realizable.

(First embodiment of electro-optical device)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing used in the following description, the scale is different for each layer and each member so that each layer and each member can be recognized on the drawing.
FIG. 1 is a diagram for explaining an example of an electro-optical device according to the present invention, FIG. 1 (a) is a diagram for explaining a planar structure, and FIG. 1 (b) is a diagram of FIG. 1 (a). FIG. 1C is a cross-sectional view taken along line AA ′, FIG. 1C is a cross-sectional view taken along line BB ′ of FIG. 1A, and FIG. 1D is an enlarged view of a part of the electro-optical device. It is an enlarged view.

  The electro-optical device 1A shown in FIG. 1 includes a liquid crystal display device (display unit) 2 having a display area 6a, a first sounding body (first group) 21, and a second sounding body (second group) 22. A sounding body, a frame 4 and a presser frame 5 are provided. As shown in FIG. 1B, each of the first sounding body 21 and the second sounding body 22 includes speakers 3a and 3b, first air chambers (air chambers) 8a and 8b, and sound emission holes 10a and 10b. The sound guide paths 9a and 9b are provided.

  In the present embodiment, an example in which two sounding bodies, ie, the first sounding body 21 and the second sounding body 22 are provided will be described. However, the number of sounding bodies may be one or three. There may be more than one and is not particularly limited. In the present embodiment, the first group and the second group will be described by taking one sounding body as an example, but the number of sounding bodies in the first group and the second group is two. The above may be used and is not particularly limited.

  The display area 6a of the liquid crystal display device 2 is rectangular as shown in FIG. 1A, and the speakers 3a and 3b of the first sounding body 21 and the second sounding body 22 overlap each other when viewed in plan. The display areas 6a are arranged side by side so as not to be present. Further, as shown in FIG. 1A, the speakers 3a and 3b overlap the display area 6a when viewed in plan.

  The frame 4 is formed of, for example, resin, and is generally formed in a quadrangular prism shape or a square plate shape in appearance. On one surface of the frame 4 (the lower surface in FIG. 1B), there are provided first air chambers 8a and 8b made of two concave portions having a circular shape in plan view. The first air chambers 8a and 8b are spaces that come into surface contact with the speakers 3a and 3b, and are provided individually corresponding to the speakers 3a and 3b. The first air chambers 8a and 8b are formed as columnar or disk-like spaces inside the frame 4 and are formed on the display area 6a side with respect to the speakers 3a and 3b.

  The speakers 3a and 3b generate sound, and as shown in FIG. 1 (b), a ring-shaped support frame 14 made of aluminum (Al) or the like, and a disk shape integrated with the support frame 14. And a disk-shaped piezoelectric element 13 fixed to both surfaces of the vibrator 12. As shown in FIG. 1B, the speakers 3 a and 3 b are supported on the frame 4 by fixing the support frame 14 to the lower surface of the frame 4 by bonding or another fixing method.

  Further, as shown in FIG. 1A, the plurality of sound emitting holes 10a and 10b constituting the first sounding body 21 and the second sounding body 22 are formed in the peripheral area 4a located outside the display area 6a in plan view. Has been placed. More specifically, the plurality of sound emitting holes 10a of the first sounding body 21 are all arranged in a line along the rectangular short side 6b which is the outer edge 6d of the display area 6a. The plurality of sound emitting holes 10b of the second sounding body 22 are all arranged along the short side 6c facing the rectangular short side 6b.

Moreover, FIG.1 (d) is the enlarged view which showed only one sound emission hole and its periphery among several sound emission holes. As shown in FIG. 1D, the sound emitting hole 10a has a width d3 in a direction orthogonal to the direction along the outer edge 6d of the display region 6a, rather than the width d2 along the outer edge 6d of the display region 6a. Is shorter. By making the sound emitting hole 10a into the shape shown in FIG. 1D, the area of the peripheral region 4a can be effectively narrowed.
Further, the center of the width d1 of the peripheral region 4a and the center of the width d3 of the sound emitting hole 10a in the direction orthogonal to the direction along the outer edge 6d are arranged so as to substantially coincide. By arranging the center of the width d1 of the peripheral region 4a and the center of the width d3 of the sound emitting hole 10a to substantially coincide with each other, the strength of the peripheral portion of the sound emitting hole 10a is reduced when the area of the peripheral region 4a is reduced. Is easy to secure.

  In addition, a concave portion 4b having a rectangular shape in plan view is provided at the center of the other surface of the frame 4 (the upper surface in FIG. 1B). A region outside the planar view of the recess 4b of the frame 4 is a peripheral region 4a. As shown in FIG. 1C, the frame 4 constituting the peripheral region 4a is formed with a plurality of sound guide paths 9a and 9b. As shown in FIG. 1B, the sound guide paths 9a and 9b are provided so as to communicate the sound emitting holes 10a and 10b with the first air chambers 8a and 8b, respectively. As shown in FIGS. 1B and 1C, the sound guide paths 9a and 9b are divided into the same number of the sound emission holes 10a and 10b as the vertical paths 81a and 81b and the individual first air chambers 8a and 8b. The horizontal paths 82a and 82b correspond to the number of sound emitting holes 10a and 10b, with the connecting points between the vertical paths 81a and 81b and the horizontal paths 82a and 82b as branch points.

The vertical paths 81a and 81b are provided in the direction perpendicular to the extending direction of the display area 6a in the same number as the number of sound emitting holes 10a and 10b, and the shape when viewed in plan is the same as that of the sound emitting holes 10a and 10b. It is a thing. Further, as shown in FIGS. 1B and 1C, the vertical paths 81a and 81b are formed in the peripheral area 4a along the short sides 6b and 6c of the display area 6a, and each of the plurality of sound emitting holes 10a and 10b. And the horizontal paths 82a and 82b are provided in communication with each other.
The horizontal paths 82a and 82b are provided in a direction parallel to the extending direction of the display area 6a. The horizontal path 82a constituting the sound guide path 9a connects all the vertical paths 81a communicating with each sound emitting hole 10a and the first air chamber 8a, and the horizontal path 82b constituting the sound guide path 9b is All the vertical paths 81b communicating with each sound emitting hole 10b are connected to the first air chamber 8b.

In the present embodiment, the sound guide paths 9a and 9b including the horizontal paths 82a and 82b connecting all the vertical paths 81a and 81b communicating with the sound emitting holes 10a and 10b and the first air chambers 8a and 8b are provided. However, the branch points of the sound guide paths 9a and 9b do not have to be a connection portion between the vertical paths 81a and 81b and the horizontal paths 82a and 82b. May be inside. Therefore, the horizontal path of the sound guide path may be divided into the same number as the number of sound emitting holes and communicated with each vertical path individually. In the present embodiment, the sound guide paths 9a and 9b including the vertical paths 81a and 81b divided into the same number as the number of the sound emission holes 10a and 10b over the entire length have been described as examples. The sound paths 9a and 9b only need to have at least a part of the sound path side of the vertical path divided into the same number of sound holes.
Here, in the sound guide paths 9a and 9b, the longer the portion divided into the same number as the number of the sound emission holes 10a and 10b, the more the amount of material constituting the frame 4 in the peripheral part of the sound guide paths 9a and 9b. Increased and excellent in strength. Further, in the sound guide paths 9a and 9b, the longer the non-divided portion, the longer the ratio of the sound guide path portion having a larger cross-sectional area with respect to the entire length of the sound guide paths 9a and 9b, thereby obtaining better sound quality.

  The presser frame 5 is made of a metal such as aluminum or stainless steel, and is formed in a rectangular tube shape having a rectangular shape in plan view. As shown in FIGS. 1B and 1C, the frame 4 is placed on the inner surface of the presser frame 5 via a cushioning material 23. The buffer material 23 is made of an elastic material such as resin or rubber. The space between the presser frame 5 and the speakers 3a and 3b functions as second air chambers 8c and 8d. Vent holes 8e and 8f are provided in a part of the presser frame 5 constituting the second air chambers 8c and 8d.

  In the first sounding body 21 and the second sounding body 22 shown in FIG. 1, when an audio signal is transmitted to the piezoelectric element 13 through a conductive wire (not shown), the piezoelectric element 13 vibrates the vibrator 12. A sound corresponding to the sound signal is generated by the interaction between the vibration of the vibrator 12 and the first air chambers 8a and 8b and the second air chambers 8c and 8d, and passes through the horizontal paths 82a and 82b and the vertical paths 81a and 81b. The sound is emitted from the sound emitting holes 10a and 10b to the outside.

  Further, in the recess 4b of the frame 4, as shown in FIG. 1B, a liquid crystal display device 2 comprising a liquid crystal panel 6 as an electro-optical panel and an illumination device 7 attached to the liquid crystal panel 6 is provided. It is stored. The liquid crystal display device 2 displays various information such as characters, numbers, and figures as images in the display area 6 a of the liquid crystal panel 6.

  The illumination device 7 is disposed on the frame 4 side (lower side) of the liquid crystal panel 6 and functions as a backlight. The illumination device 7 may be disposed on the observation side of the liquid crystal panel 6 and function as a front light. Moreover, the illuminating device 7 can be comprised by several LED (Light Emitting Diode) as a light source, and a light guide, for example. In such an illuminating device 7, the light emitted from the LED can be converted into planar light by the light guide and supplied to the liquid crystal panel 6. The light source can also be configured by a linear light source such as a point light source other than an LED or a cold cathode tube.

  As the liquid crystal panel 6, for example, a liquid crystal panel formed by sealing liquid crystal between a pair of translucent substrates each having an electrode can be used. Note that a polarizing plate in which the polarization axis is appropriately shifted is provided on each outer surface of the pair of translucent substrates. When planar light is supplied from the lighting device 7 to the liquid crystal panel 6, the voltage applied to the pair of electrodes is controlled for each pixel, thereby modulating the light passing through the liquid crystal for each pixel. By passing light through the polarizing plate, images such as letters, numbers, figures, etc. are displayed on the light exit side of the polarizing plate.

  The liquid crystal panel 6 can be configured in any display mode. For example, as for the liquid crystal driving method, either a simple matrix method or an active matrix method may be used. In terms of the type of liquid crystal mode, TN (Twisted Nematic), STN (Super Twisted Nematic), or the like can be used. In terms of the daylighting method, any of a transmissive type, a reflective type, and a transflective type may be used. In this embodiment, since the illumination device 7 is used, the daylighting method is a transmissive type or a transflective type.

  Here, the effect of the present invention will be described with reference to FIG. FIG. 7 is a diagram for explaining an example of an electro-optical device including two sounding bodies having one sound emitting hole, and FIG. 7A is a diagram for explaining a planar structure. (B) is the sectional view on the AA 'line of Fig.7 (a), FIG.7 (c) is the sectional view on the BB' line of Fig.7 (a). In the electro-optical device shown in FIG. 7, the same parts as those of the electro-optical device shown in FIG.

The electro-optical device shown in FIG. 7 is different from the electro-optical device 1A shown in FIG. 1 only in the sound emission hole and the vertical path of the sound guide path.
In the electro-optical device shown in FIG. 7, the sound emitting holes 11a and 11b constituting the first sounding body 21 and the second sounding body 22 are each one as shown in FIG. 7A, and the display area 6a. Is disposed in the peripheral region 4a located outside the plan view. More specifically, the sound emitting hole 11a of the first sounding body 21 is disposed near the center of the rectangular short side 6b, which is the outer edge 6d of the display area 6a, and the sound emitting hole 11b of the second sounding body 22 is rectangular. It is arrange | positioned in the center vicinity of the short side 6c facing the short side 6b.
Further, as shown in FIGS. 7B and 7C, one vertical path 83a, 83b of the sound guide paths 9a, 9b is provided in a direction orthogonal to the extending direction of the display region 6a, and is viewed in plan view. The shape of the sound is the same as that of the sound emitting holes 11a and 11b, and the sound emitting holes 11a and 11b are connected to the horizontal paths 82a and 82b.

The electro-optical device shown in FIG. 7 includes sounding bodies 21 and 22 each having sound guiding paths 9a and 9b including one sound emitting hole 11a and 11b and one vertical path 83a and 83b. A predetermined opening area must be ensured by the sound holes 11a and 11b and one vertical path 83a and 83b. Accordingly, the sound emitting holes 11a and 11b and the vertical paths 83a and 83b cannot be reduced, and the area of the peripheral region 4a necessary for arranging the sound emitting holes 11a and 11b and the vertical paths 83a and 83b is sufficiently narrow. I can't do it.
Further, in the electro-optical device shown in FIG. 7, even if the sound emitting holes 11a and 11b are a plurality of small ones, the arrangement of the sound emitting holes is determined by the arrangement of the vertical paths 83a and 83b. The sound emitting holes cannot be appropriately arranged so that the area of the sound is reduced.
Further, in the electro-optical device shown in FIG. 7, since the vertical paths 83a and 83b become one thick and large cavity in the frame 4, the amount of the material constituting the frame 4 is the peripheral portion of the vertical paths 83a and 83b. As a result, the intensity unevenness of the frame 4 increases. For this reason, it has been necessary to secure a sufficient thickness of the frame 4 in the peripheral portions of the vertical paths 83a and 83b.
Here, in the electro-optical device shown in FIG. 7, the sound emitting holes 11 a and 11 b are arranged by increasing the shape of the sound emitting holes 11 a and 11 b in the rectangular short sides 6 b and 6 c and narrowing the width. It is conceivable to reduce the area of the peripheral region 4a necessary for this, but in this case as well, the vertical paths 83a and 83b become one large cavity that is long in the direction of the short sides 6b and 6c of the rectangle in the frame 4. Therefore, the strength of the frame 4 becomes insufficient.

On the other hand, in the electro-optical device 1A shown in FIG. 1, a plurality of sound emitting holes 10a and 10b and a plurality of vertical paths 81a and 81b of the sound guiding paths 9a and 9b communicating with the sound emitting holes 10a and 10b are provided. Therefore, it is possible to reduce the size of each of the sound emitting holes 10a and 10b while sufficiently securing the opening area of the sound emitting holes 10a and 10b.
In addition, the first sounding body 21 and the second sounding body 22 include a plurality of sound emitting holes 10a and 10b arranged in the peripheral region 4a, a plurality of sound emitting holes 10a and 10b, and first air chambers 8a and 8b, respectively. Sound path 9a, 9b having a plurality of vertical paths 81a, 81b communicating with each other, so that each sound emitting hole 10a, 10b and one vertical path 81a, 81b communicating with each sound emitting hole 10a, 10b are combined. It can be regarded as one set, and one set can be appropriately arranged so that the area of the peripheral region 4a is narrowed. Therefore, the arrangement of the sound emission holes 10a and 10b is not determined by the arrangement of the sound guide paths 9a and 9b, and the sound emission holes 10a and 10b and the vertical paths are arranged so that the area of the peripheral region 4a is reduced. 81a and 81b can be arranged appropriately, and the area of the peripheral region 4a necessary for arranging the sound emission holes 10a and 10b and the sound guide paths 9a and 9b can be made very narrow.

Further, in the electro-optical device 1A shown in FIG. 1, the vertical paths 81a and 81b become a plurality of thin and small cavities partitioned from each other in the frame 4, and the vertical path is made by the material constituting the frame 4 constituting the partition. The periphery of is reinforced. For this reason, in the electro-optical device 1A shown in FIG. 1, the amount of the material constituting the frame 4 in the peripheral portion of the vertical path is larger than that of the electro-optical device shown in FIG. Become. Therefore, the thickness of the frame 4 in the peripheral portions of the vertical paths 81a and 81b can be sufficiently reduced.
As described above, in the electro-optical device 1A shown in FIG. 1, the area of the peripheral region necessary for arranging the sound emitting holes 10a and 10b and the vertical paths 81a and 81b is smaller than that of the electro-optical device shown in FIG. Can be narrowed.

Further, in the electro-optical device 1A of the present embodiment, the speakers 3a and 3b overlap the display area 6a when seen in a plan view. Therefore, compared with the case where the speakers 3a and 3b are arranged in the peripheral area 4a, The optical device 1A can be reduced in size.
Furthermore, in the electro-optical device 1A of the present embodiment, since the sound emitting holes 10a and 10b are provided on the same surface as the display region 6a, it is easy for the observer who watches the display to hear the sound.

Further, in the electro-optical device 1A of the present embodiment, the speakers 3a and 3b are arranged side by side so as not to overlap each other when viewed in plan, so that the speakers 3a and 3b overlap each other when viewed in plan. The electro-optical device is thinner than the case where it is arranged.
Further, in the electro-optical device 1A of the present embodiment, the speakers 3a and 3b are arranged side by side so as not to overlap each other when seen in a plan view, so that the lengths of the sound guide paths 9a and 9b are set to the first sound generation. The body 21 and the second sounding body 22 can be the same, the phase of the sound emitted from the sound emitting holes 10a and 10b can be the same, the sound is well balanced, and the sound is easy for the observer to hear It will be.

  In the electro-optical device 1A according to the present embodiment, the speaker 3a and 3b are supported by the frame 4 by fixing the support frame 14 to the lower surface of the frame 4 as an example. The invention is not limited to the above-described embodiment. For example, as in the electro-optical device 2A shown in FIG. 2, the support frame 14 is fixed to the inner surface of the presser frame 5 via the cushioning material 23, thereby 3a and 3b may be supported by the presser frame 5. 2 is a diagram for explaining another example of the electro-optical device of the present invention, and corresponds to a cross-sectional view taken along the line AA ′ in the planar structure of the electro-optical device shown in FIG. It is.

(Second embodiment of electro-optical device)
3A and 3B are diagrams for explaining another example of the electro-optical device of the present invention, FIG. 3A is a diagram for explaining a planar structure, and FIG. 3B is a diagram for explaining FIG. ) Is a cross-sectional view taken along the line AA ′ of FIG. 3, and FIG. 3C is a cross-sectional view taken along the line BB ′ of FIG. In the electro-optical device shown in FIG. 3, the same parts as those of the electro-optical device shown in FIG.

  As shown in FIG. 3A, in the electro-optical device 1B of the present embodiment, the display area 6a of the liquid crystal display device 2 has a longer side and a shorter side than the electro-optical device 1A shown in FIG. As shown in FIGS. 3A and 3B, the speakers 3a and 3b are arranged so as to overlap each other when viewed in plan. Further, as shown in FIGS. 3A and 3B, the speakers 3a and 3b overlap with the display area 6a when viewed in plan, like the electro-optical device 1A shown in FIG.

  Further, in the electro-optical device 1A shown in FIG. 1, the speakers 3a and 3b are supported by the frame 4. However, in the electro-optical device 1B shown in FIG. 3, the speaker 3a is supported by the presser frame 51. And it is the column-shaped or disk-shaped space formed in the presser frame 51 side (lower side in FIG. 3) with respect to the speaker 3a, Comprising: The space between the speaker 3a and the inner wall of the presser frame 51 is, It functions as the first air chamber 8a. The space between the speaker 3a and the speaker 3b functions as a second air chamber 8g shared by the first sounding body 21 and the second sounding body 22. Further, in the electro-optical device 1B shown in FIG. 3, the side surface 8i is formed by joining the frame 41 and the presser frame 51. As shown in FIG. A vent hole 8h is provided.

  Further, in the electro-optical device 1B of the present embodiment, the sound guide path 91 of the first sounding body 21 is formed in the frame 41 and the presser frame 51, as shown in FIG. As shown in FIGS. 3B and 3C, the sound guide path 91 is provided to communicate each of the plurality of sound emitting holes 10a with the first air chamber 8a. As shown in FIGS. 3B and 3C, the sound guide path 91 includes a vertical path 86 and a horizontal path 85.

As in the electro-optical device 1A shown in FIG. 1, the vertical paths 86 are provided in the same direction as the number of the sound emitting holes 10a in the direction orthogonal to the extending direction of the display region 6a, and the shape when viewed in plan is the sound emitting holes. 10a, and each of the plurality of sound emitting holes 10a is provided in communication with the horizontal path 85.
Further, the horizontal path 85 connects all the vertical paths 86 communicating with the sound emitting holes 10a and the first air chamber 8a, similarly to the electro-optical device 1A shown in FIG.

  In the electro-optical device 1B of the present embodiment, the speakers 3a and 3b are arranged so as to overlap each other when seen in a plan view, so that the lengths of the sound guide paths 91 and 9b are set to the first sounding body 21 and It is difficult for the second sounding body 22 to be the same. Therefore, in the electro-optical device 1B according to the present embodiment, the difference in sound quality caused by the difference in length between the sound guide paths 91 and 9b is compensated, and the phases of the sounds emitted from the sound emission holes 10a and 10b are made the same. Further, it is desirable that the cross-sectional areas of the sound guide path 91 and the sound guide path 9b are different from each other. Specifically, the difference between the lengths of the sound guide paths 91 and 9b is determined by a method of increasing the cross-sectional area of the longer sound guide path 91 or a method of reducing the cross-sectional area of the shorter sound guide path 9b. It is possible to appropriately compensate for the resulting difference in sound quality, to achieve a good sound balance, and for the observer to easily hear the sound.

  Here, the effect of the present invention will be described with reference to FIG. 8 is a diagram for explaining an example of an electro-optical device including two sounding bodies having one sound emitting hole, and FIG. 8A is a diagram for explaining a planar structure. 8B is a cross-sectional view taken along line AA ′ in FIG. 8A, and FIG. 8C is a cross-sectional view taken along line BB ′ in FIG. In the electro-optical device shown in FIG. 8, the same parts as those of the electro-optical device shown in FIG.

The electro-optical device shown in FIG. 8 is different from the electro-optical device 1B shown in FIG. 3 only in the sound emission hole and the vertical path of the sound guide path.
In the electro-optical device shown in FIG. 8, the sound emitting holes 11a and 11b constituting the first sounding body 21 and the second sounding body 22 are each one as shown in FIG. 8A, and the display area 6a. Is disposed in the peripheral region 4a located outside the plan view. More specifically, the sound emitting hole 11a of the first sounding body 21 is disposed near the center of one side 6b of the rectangle that is the outer edge 6d of the display area 6a, and the sound emitting hole 11b of the second sounding body 22 is rectangular. It is arranged near the center of the side 6c facing the side 6b.
Further, as shown in FIGS. 8B and 8C, one vertical path 87a, 87b of the sound guide paths 91, 9b is provided in a direction orthogonal to the extending direction of the display region 6a, and is viewed in plan view. The shape of the sound is the same as that of the sound emitting holes 11a and 11b, and the sound emitting holes 11a and 11b are connected to the horizontal paths 85 and 82b.

The electro-optical device shown in FIG. 8 is similar to the electro-optical device shown in FIG. 7, the sounding body 21 having sound guide paths 91 and 9 b including one sound emitting hole 11 a and 11 b and one vertical path 87 a and 87 b, 22 is provided, the area of the peripheral region 4a necessary for disposing the sound emitting holes 11a and 11b and the vertical paths 87a and 87b cannot be sufficiently reduced.
Further, in the electro-optical device shown in FIG. 8, as in the electro-optical device shown in FIG. 7, even if the sound emitting holes 11a and 11b are a plurality of small ones, the sound emitting holes are arranged by the arrangement of the vertical paths 87a and 87b. Therefore, each sound emitting hole cannot be properly arranged so that the area of the peripheral region 4a is narrowed.
Further, in the electro-optical device shown in FIG. 8, the vertical paths 87a and 87b become one thick and large cavity in the frame 41 and the presser frame 51, similarly to the electro-optical device shown in FIG. In addition, the amount of the material constituting the presser frame 51 is significantly reduced only in the peripheral portions of the vertical paths 87a and 87b, and the strength unevenness of the frame 41 and the presser frame 51 is increased. For this reason, the thickness of the frame 41 and the presser frame 51 in the peripheral portions of the vertical paths 87a and 87b has to be secured sufficiently.

  On the other hand, in the electro-optical device 1B shown in FIG. 3, like the electro-optical device 1A shown in FIG. 1, the sound emitting holes 10a and 10b and the sound guide paths 91 communicating with the sound emitting holes 10a and 10b are provided. 9b, a plurality of vertical paths 86, 81b are provided, so that the area of the peripheral region 4a necessary for disposing the sound emission holes 10a, 10b and the sound guide paths 91, 9b can be reduced.

Further, in the electro-optical device 1B shown in FIG. 3, the display area 6a of the liquid crystal display device 2 is a rectangle having a small difference in length between the long side and the short side as compared with the electro-optical device 1A shown in FIG. In addition, the speakers 3a and 3b are arranged so as to overlap each other when seen in a plan view, and also overlap with the display region 6a when seen in a plan view, so that compared with the electro-optical device 1A shown in FIG. The size of the electro-optical device can be further reduced.
Further, in the electro-optical device 1B shown in FIG. 3, the space between the speaker 3a and the speaker 3b functions as the second air chamber 8g shared by the first sounding body 21 and the second sounding body 22, so that the speaker 3a The electro-optical device can be made thinner compared to the case where the first sounding body 21 and the second sounding body 22 are provided with separate second air chambers between the speaker 3b and the speaker 3b.

Further, in the electro-optical device 1A shown in FIG. 1, the sizes of the two speakers 3a and 3b must be determined according to the half length of the long side of the display area 6a, but the electro-optical device shown in FIG. In the device 1B, the sizes of the two speakers 3a and 3b can be determined according to the length of the short side 6a of the display area. Therefore, the electro-optical device 1B shown in FIG. 3 can include the speakers 3a and 3b that are relatively larger than the display region 6a as compared with the electro-optical device 1A shown in FIG. It is possible to provide a sounding body with high sound quality and excellent sound quality.
In the electro-optical device 1B shown in FIG. 3, the speakers 3a and 3b are arranged so as to completely overlap when seen in a plan view, but are arranged so that at least parts thereof overlap each other when seen in a plan view. It is good as it is. Also in this case, the size of the electro-optical device can be further reduced as compared with the electro-optical device 1A shown in FIG. 1, and the speakers 3a and 3b that are relatively large with respect to the display area 6a are provided. Is possible.

(Third embodiment of electro-optical device)
4A and 4B are diagrams for explaining another example of the electro-optical device of the present invention, FIG. 4A is a diagram for explaining a planar structure, and FIG. 4B is a diagram for FIG. 4A is a cross-sectional view taken along line AA ′, FIG. 4C is a cross-sectional view taken along line BB ′ of FIG. 4A, and FIG. 4D is a cross-sectional view taken along line CC ′ of FIG. It is line sectional drawing. In the electro-optical device shown in FIG. 4, the same parts as those of the electro-optical device 2A shown in FIG.

  As shown in FIG. 4A, in the electro-optical device 1C of the present embodiment, unlike the electro-optical device 2A shown in FIG. 2, a plurality of sound emitting holes constituting the first sounding body 21 and the second sounding body 22 are provided. 10a and 10b are all arranged in the peripheral area 4a along one long side 6e of the rectangle which is the outer edge 6d of the display area 6a. Therefore, as shown in FIGS. 4C and 4D, the vertical paths 81a and 81b are also formed in the peripheral area 4a along one long side 6e of the display area 6a.

In the electro-optical device 1C shown in FIG. 4 as well, as in the electro-optical device 1A shown in FIG. 1, the sound emitting holes 10a and 10b and the sound guide paths 9a and 9b communicating with the sound emitting holes 10a and 10b are perpendicular to each other. Since a plurality of paths 81a and 81b are provided, the area of the peripheral region 4a necessary for arranging the sound emission holes 10a and 10b and the sound guide paths 9a and 9b can be reduced.
Further, in the electro-optical device 1C shown in FIG. 4, the display area 6a is rectangular, and the plurality of sound emitting holes 10a, 10b are all arranged along the long side 6e which is one side of the rectangle. It is not necessary to secure an area for disposing the sound emitting holes 10a and 10b and the sound guide paths 9a and 9b in the peripheral region 4a along the three sides except for 6e, and a plurality of like the electro-optical device 1A shown in FIG. Compared with the case where the sound emission holes 10a and 10b are arranged along the rectangular short sides 6b and 6c, the peripheral area necessary for arranging the sound emission holes 10a and 10b and the sound guide paths 9a and 9b The area of 4a can be narrowed.

  Further, in the electro-optical device 1C shown in FIG. 4, an example in which the support frame 14 is fixed to the inner surface of the presser frame 5 via the buffer material 23 so that the speakers 3a and 3b are supported by the presser frame 5 is an example. However, the present invention is not limited to the above-described embodiment. For example, the support frame 14 is fixed to the lower surface of the frame 4 as in the electro-optical device 2C shown in FIG. The speakers 3 a and 3 b may be supported by the frame 4. FIG. 5 is a diagram for explaining another example of the electro-optical device of the present invention, and FIG. 5A is an AA ′ line in the planar structure of the electro-optical device shown in FIG. FIG. 4B is a cross-sectional view taken along the line BB ′ of FIG. 4A.

(Embodiment 4 of electro-optical device)
6A and 6B are diagrams for explaining another example of the electro-optical device of the present invention, FIG. 6A is a diagram for explaining a planar structure, and FIG. 6B is a diagram for FIG. 6A is a cross-sectional view taken along the line AA ′ of FIG. 6, FIG. 6C is a cross-sectional view taken along the line BB ′ of FIG. 6A, and FIG. 6D is a cross-sectional view taken along line CC ′ of FIG. It is line sectional drawing. In the electro-optical device shown in FIG. 6, the same parts as those of the electro-optical device shown in FIG.

  As shown in FIG. 6A, in the electro-optical device 1D of the present embodiment, unlike the electro-optical device shown in FIG. 3, a plurality of sound emitting holes 10a constituting the first sounding body 21 and the second sounding body 22 are used. 10b are all arranged in the peripheral area 4a along one long side 6e of the rectangle which is the outer edge 6d of the display area 6a. Therefore, as shown in FIGS. 6B and 6D, the vertical paths 86 and 81b are also formed in the peripheral region 4a along one long side 6e of the display region 6a.

Also in the electro-optical device 1D shown in FIG. 6, as in the electro-optical device 1A shown in FIG. 1, the sound emitting holes 10a and 10b and the sound guide paths 91 and 9b communicating with the sound emitting holes 10a and 10b are perpendicular to each other. Since a plurality of paths 86 and 81b are provided, the area of the peripheral region 4a necessary for disposing the sound emission holes 10a and 10b and the sound guide paths 91 and 9b can be reduced.
Further, in the electro-optical device 1D shown in FIG. 6, the display area 6a is rectangular, and the plurality of sound emitting holes 10a and 10b are all arranged along the long side 6e which is one side of the rectangle. Compared to the case where a plurality of sound emitting holes 10a and 10b are arranged along the rectangular short sides 6b and 6c as in the electro-optical device 1A shown in FIG. 1, the sound emitting holes 10a and 10b and the sound guiding path 91 are provided. , 9b can be reduced in the area of the peripheral region 4a required.
In addition, in the electro-optical device 1D shown in FIG. 6, the display region 6a of the liquid crystal display device 2 is a rectangle having a small difference in length between the long side and the short side as compared with the electro-optical device 1A shown in FIG. In addition, the speakers 3a and 3b are arranged so as to overlap each other when seen in a plan view, and also overlap with the display region 6a when seen in a plan view, so that compared with the electro-optical device 1A shown in FIG. The size of the electro-optical device can be further reduced, and the speakers 3a and 3b that are relatively large with respect to the display area 6a can be provided.

(Other Embodiments Regarding Electro-Optical Device)
The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the embodiments, and various modifications can be made within the scope of the invention described in the claims.
For example, in the above description, a liquid crystal display device is used as the display unit of the electro-optical device, but other display devices such as an EL display device and a plasma display device can be used instead of the liquid crystal display device. Further, in the above-described embodiment, the sounding body using the diaphragm and the piezoelectric element is described as an example of the speaker. However, the sounding body is not limited to the one having such a speaker, and may be used as necessary. Sound generators equipped with speakers having various structures can be used.

(First Embodiment of Electronic Device)
FIG. 9 is a perspective view showing a mobile phone as an example of an electronic apparatus according to the invention. A cellular phone 80 shown in FIG. 9 includes a main body 81 and a display body 82 provided on the main body 81 so as to be opened and closed. Operation buttons 83 are arranged on the main body 81. In addition, the electro-optical device 1A shown in FIG.

  Since the cellular phone 80 shown in FIG. 9 includes the electro-optical device 1A that can reduce the area of the peripheral region, the cellular phone 80 is small. In the mobile phone 80 shown in FIG. 9, the electro-optical device shown in FIGS. 2 to 6 may be arranged instead of the electro-optical device 1A.

(Other embodiments regarding electronic devices)
The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the embodiments, and various modifications can be made within the scope of the invention described in the claims. For example, as an electronic device according to the present invention, in addition to the mobile phone described above, a personal computer, a liquid crystal television, a digital still camera, a wristwatch, a viewfinder type or a monitor direct view type video tape recorder, a car navigation device, Pagers, electronic notebooks, calculators, word processors, workstations, videophones, POS terminals, and other various devices are conceivable.

FIG. 1 is a diagram for explaining an example of an electro-optical device according to the present invention. FIG. 2 is a diagram for explaining another example of the electro-optical device according to the invention. FIG. 3 is a diagram for explaining another example of the electro-optical device of the invention. FIG. 4 is a diagram for explaining another example of the electro-optical device according to the invention. FIG. 5 is a diagram for explaining another example of the electro-optical device according to the invention. FIG. 6 is a diagram for explaining another example of the electro-optical device according to the invention. FIG. 7 is a diagram for explaining an example of an electro-optical device including two sounding bodies having one sound emitting hole. FIG. 8 is a diagram for explaining an example of an electro-optical device including two sounding bodies having one sound emitting hole. FIG. 9 is a perspective view showing a mobile phone as an example of an electronic apparatus according to the invention.

Explanation of symbols

1A, 1B, 1C, 1D, 2A, 2C, electro-optical device, 2 liquid crystal display device (display unit), 3a, 3b speaker, 4, 41 frame, 4a peripheral region, 4b recess, 5, 51 presser frame, 6 liquid crystal panel 6a display area, 6b, 6c short side, 6d outer edge, 6e long side, 7 lighting device, 8a, 8b first air chamber (air chamber), 8c, 8d, 8g second air chamber, 8e, 8f, 8h Pore, 8i side surface, 9a, 9b, 91 sound guide path, 10a, 10b, 11a, 11b sound emission hole, 12 vibrator, 13 piezoelectric element, 14 support frame, 21 first sounding body (first group) (sounding body ), 22 2nd sounding body (second group) (sounding body), 23 cushioning material, 80 mobile phone, 81 main body, 81a, 81b, 83a, 83b, 86, 87a, 87b vertical path, 82 display body, 82a, 82b, 85 horizontal path 83 Operation button.

Claims (9)

A display unit having a display area and a sounding body;
The speaker is arranged so as to overlap with the display area when viewed in plan, an air chamber containing the speaker, and a plurality of areas arranged in a peripheral area located outside the display area in plan view An electro-optical device comprising: a sound emitting hole; and a plurality of branched sound guiding paths that communicate each of the plurality of sound emitting holes with the air chamber.   2. The electro-optical device according to claim 1, wherein the plurality of sound emitting holes are arranged in a line along an outer edge of the display area.   The electro-optical device according to claim 1, wherein the display area is a rectangle, and the plurality of sound emission holes are all arranged along one side of the rectangle.   The electro-optical device according to claim 1, wherein a plurality of the sounding bodies are provided.   5. The electro-optical device according to claim 4, wherein the plurality of speakers constituting the plurality of sound generators are arranged side by side so as not to overlap each other when viewed in plan.   5. The electro-optical device according to claim 4, wherein the plurality of speakers constituting the plurality of sound generators are arranged so that at least a part thereof overlaps each other when seen in a plan view. The display area is rectangular;
The plurality of sounding bodies are divided into a first group and a second group;
The plurality of sound emitting holes of the sound generators constituting the first group are all arranged along one side of the rectangle,
The sound emission holes constituting the second group are all arranged along a side opposite to one side of the rectangle. The electro-optical device described.   The dimension of the sound emitting hole is shorter in a direction orthogonal to a direction along the outer edge of the display area than in a direction along the outer edge of the display area. The electro-optical device according to 1. An electronic apparatus comprising the electro-optical device according to claim 1.

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