JP4301300B2 - Electro-optical device and electronic apparatus - Google Patents

Description

  The present invention relates to an electro-optical device such as a liquid crystal display device. The present invention also relates to an electronic apparatus configured using the electro-optical device.

  In recent years, electro-optical devices such as liquid crystal display devices have been widely used in electronic devices such as mobile phones and portable information terminals. For example, an electro-optical device is used as a display device for displaying various types of information related to electronic equipment. The electro-optical device is a device that controls an optical output state by an electric input, and for example, a liquid crystal display device, an EL (Electro Luminescence) device, a plasma display device, and other devices can be considered.

  The above-described electro-optical device is mainly used when various types of information related to electronic devices are displayed as images. In addition to such image display means, electronic devices generate sound. It is also necessary to provide. For example, in a mobile phone, it is necessary to express what the other party speaks by voice. The means for generating such a sound is constituted by a sounding body such as a speaker, for example. 2. Description of the Related Art Conventionally, an electronic apparatus including both an electro-optical device and a sounding body is known. In addition, an electronic device including a plurality of sounding bodies is also known (see, for example, Patent Document 1 or Patent Document 2).

Japanese Patent Laying-Open No. 2003-078601 (Page 3, FIG. 1) Japanese Unexamined Patent Publication No. 2003-158787 (page 3, FIG. 3)

However, in the above-described conventional electronic device, the electro-optical device and the sounding body are installed in different places in the casing of the electronic device. In this case, if the electro-optical device and the sounding body are separately arranged in the thickness direction of the electronic device, the thickness of the electronic device may be too thick. In recent years, there has been an increasing demand for thinning electronic devices, and increasing the thickness of electronic devices as described above is contrary to the demand for thinning. In order to prevent the electronic device from becoming thick, it is conceivable that the electro-optical device and the sounding body are arranged so as not to overlap each other. However, in this case, the planar shape of the electronic device becomes large, and it is still impossible to meet the demand for downsizing.

  In addition, when a sounding body is provided inside an electronic device, an acoustic design around the sounding body must be performed after an electro-optical device is installed inside the electronic device. And thinning was difficult.

The present invention has been made in view of the above-described problems, and when an electro-optical device having both a display unit and a sounding body is provided as an integrated structure inside an electronic apparatus, the electro-optical device as a whole is provided. An object of the present invention is to make it possible to form a small thickness and a thin electronic device.

The electro-optical device according to the present invention includes a display unit having a display area, a sound generator that generates sound and is disposed so as to overlap the back side of the display unit, and between the display unit and the sound generator. A first frame that is disposed and holds the display unit; and a second frame that supports the first frame from a side opposite to the display unit side of the first frame via a cushioning material, and at least the The first frame or the second frame, the sound generator, and the cushioning material form an air chamber that is a space in surface contact with the sound generator.

In the above configuration, the “display unit” can be configured by any display means. As such display means, a liquid crystal display device, an EL display device, a plasma display device, and other display devices can be applied. Further, the “sound generator” can be constituted by a speaker, for example. The first frame can be formed of plastic, metal, or the like. The second frame can be formed of metal.

According to the electro-optical device having the above configuration, the display unit is held by the first frame, and the first frame is arranged between the display unit and the sounding body. For this reason, when the electro-optical device is assembled inside the electronic device, the display unit, the first frame, and the sounding body need only be attached to an appropriate position inside the electronic device as an integrated structure. As compared with the case where the device is separately incorporated in the electronic device, the overall shape of the electro-optical device and the electronic device can be reduced in size and thickness. Further, the second frame that supports the first frame from the side opposite to the display unit side of the first frame via the cushioning material can make the integrated structure more firm.

Further, according to this electro-optical device, it is desirable to form an air chamber that is a space in surface contact with the sounding body by at least the first frame or the second frame, the sounding body, and the cushioning material. It is important in acoustic design to provide an air chamber for the sounding body. In this case, if the air chamber is formed by the first frame or the second frame, which is a component of the electro-optical device, the sound generator, and the cushioning material, no acoustic design is required on the electronic device side. It is very advantageous for.

Next, in the electro-optical device according to the aspect of the invention, it is preferable that the sounding body is fixed to the first frame.

Next, in the electro-optical device according to the aspect of the invention, it is preferable that the sounding body is fixed to the second frame.

Next, in the electro-optical device according to the aspect of the invention, it is preferable that the buffer material is interposed between the sounding body and the second frame.

Next, in the electro-optical device according to the aspect of the invention, it is preferable that the electro-optical device further includes a third frame that holds the first frame in a pressed state in cooperation with the second frame. In this way, an integrated structure including the display unit, the first frame, and the sounding body can be held extremely firmly.

Next, in the electro-optical device according to the aspect of the invention, it is preferable that the second frame has a container shape that accommodates the display unit, the first frame, and the sounding body. In this way, it is very easy to make the display unit, the first frame, and the sounding body all in one piece, and the one piece structure can be firmly held.

Next, in the electro-optical device according to the aspect of the invention, it is preferable that the sounding body is disposed on the back side of the display unit with the first frame interposed therebetween. This makes it easier to see the display on the display unit. In addition, the electro-optical device can be made smaller as compared with the case where the sounding body is provided in the lateral position of the display unit.

Next, in the electro-optical device according to the present invention, it is desirable that a plurality of sounding bodies are provided, and the plurality of sounding bodies are arranged so as not to overlap each other in a plane. In this way, stereo sound can be output. In addition, the thickness of the electro-optical device in the thickness direction can be reduced.

Next, in the electro-optical device according to the present invention, it is desirable that a plurality of sounding bodies are provided, and the plurality of sounding bodies are arranged so that at least a part thereof overlaps with each other in a plane. In this way, the dimension in the width direction of the electro-optical device can be reduced.

Next, an electronic apparatus according to the present invention includes an electro-optical device and a fixed member to which the electro-optical device is attached, and the electro-optical device is an electro-optical device having the above-described configuration. To do.

According to the electro-optical device used in the electronic apparatus, the display unit is held by the first frame, and the first frame is disposed between the display unit and the sounding body. For this reason, when the electro-optical device is assembled inside the electronic device, the display unit, the first frame, and the sounding body need only be attached to an appropriate position inside the electronic device as an integrated structure. The overall shape of the electronic device can be reduced in size and thickness as compared with the case where the electronic device is separately incorporated.

Next, in the above electronic device, it is preferable that the fixed member is an exterior case of the electronic device. This eliminates the need for newly preparing a member for attaching the electro-optical device with respect to the electronic apparatus, which is advantageous in terms of component costs.

(First embodiment of electro-optical device)
Hereinafter, an electro-optical device according to the invention will be described based on embodiments. In addition, embodiment described below is an example of this invention, Comprising: This invention is not limited. In the following description, reference will be made to the drawings as necessary. In this drawing, in order to clearly show important constituent elements among the structure composed of a plurality of constituent elements, the relative dimensions different from actual ones are shown. Is shown.

  FIG. 1 shows a cross-sectional structure of an embodiment of an electro-optical device according to the invention. FIG. 2 shows a planar structure of the electro-optical device as viewed from the direction of arrow A in FIG. In these drawings, the electro-optical device 1A includes a liquid crystal display device 2 as a display unit, speaker units 3a and 3b as sounding bodies, a first frame 4, and a second frame 5. Although two speaker units 3a and 3b are provided in the present embodiment, a plurality of speaker units 3a and 3b may be provided.

  The liquid crystal display device 2 includes a liquid crystal panel 6 as an electro-optical panel and a lighting device 7 attached to the liquid crystal panel 6. The liquid crystal display device 2 displays various information as images such as characters, numbers, figures, etc. in the display area of the liquid crystal panel 6, and this display is visually recognized by the observer from the direction of arrow A. The illumination device 7 is disposed on the back side of the liquid crystal panel 6 when viewed from the observation direction indicated by the arrow A, and functions as a backlight. The illumination device 7 may be disposed on the observation side of the liquid crystal panel 6 to function as a front light.

  Although detailed illustration is abbreviate | omitted, the illuminating device 7 can be comprised by several LED (Light Emitting Diode) as a light source, and a light guide, for example. The light emitted from the LED is 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.

  Although not shown in detail, the liquid crystal panel 6 is formed, for example, by enclosing liquid crystal between a pair of translucent substrates each having an electrode. A polarizing plate in which the polarization axis is appropriately shifted is provided on the outer surface of each of the pair of translucent substrates. When planar light is supplied from the illuminating device 7 to the liquid crystal panel 6, the light passing through the liquid crystal is modulated for each pixel by controlling the voltage applied to the pair of electrodes for each pixel. By passing 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. As for the type of liquid crystal mode, TN (Twisted Nematic), STN (Super Twisted Nematic), liquid crystal having negative dielectric anisotropy, that is, liquid crystal for vertical alignment, and any other liquid crystal 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.

  The simple matrix method is a matrix method in which each pixel does not have an active element, the intersection between the scanning electrode and the data electrode corresponds to a pixel or a dot, and a drive signal is directly applied. As the liquid crystal mode for this method, TN, STN, and vertical alignment mode are used. Next, in the active matrix system, an active element is provided for each pixel or dot, the active element is turned on in the writing period and the data voltage is written, and the active element is turned off in the other period. Is a matrix method. Active elements used in this method include a three-terminal type and a two-terminal type. An example of a three-terminal active element is a TFT (Thin Film Transistor). An example of a two-terminal active element is TFD (Thin Film Diode).

  In the liquid crystal panel 6 as described above, when color display is performed, a color filter is provided on one of the pair of substrates. The color filter is formed by a plurality of filters that selectively transmit light in a specific wavelength range. For example, the three primary colors B (blue), G (green), and R (red) are arranged in a predetermined arrangement, for example, a stripe arrangement, a delta arrangement, and a mosaic arrangement, corresponding to each pixel on the substrate. Formed by.

  The speaker units 3 a and 3 b as viewed from the observation side indicated by the arrow A are entirely within the space area K 0 in the perpendicular direction on the surface of the liquid crystal panel 6 on the display area side. These speaker units 3 a and 3 b are arranged on the back surface of the liquid crystal panel 6 so as to overlap the liquid crystal panel 6 when viewed from the observation direction indicated by the arrow A. The speaker units 3 a and 3 b are made of, for example, an aluminum (Al) ring-shaped frame 11, a disk-shaped vibrator 12 integrated with the frame 11, and a disk-like shape fixed to the vibrator 12. Piezoelectric element 13. The speaker units 3a and 3b are supported by the first frame 4 by fixing the frame 11 to the bottom surface of the first frame 4 by bonding or other fixing methods.

  The first frame 4 is formed by resin molding, for example, and is generally formed in a prismatic shape or a square plate shape in appearance. The first frame 4 is provided with a first air chamber R1 which is a space in surface contact with the speaker units 3a and 3b. These first air chambers R1 are formed as columnar or disk-shaped spaces. These first air chambers R1 are air chambers formed on the display unit side with respect to the speaker units 3a and 3b.

  The first frame 4 has a rectangular recess Q as viewed from the direction of arrow A at its upper end, and the illumination device 7 and the liquid crystal panel 6 are accommodated in the recess Q. The first frame 4 has two sound guide paths P therein. One end Pa of these sound guide paths P communicates with a part of the upper end surface of the first air chamber R1, and the other end Pb is opened to the front surface of the first frame 4, that is, the observation side surface. It has become.

  The second frame 5 is formed in a rectangular tube shape, that is, a container shape, by a rectangular bottom wall 5a when viewed from the arrow A direction and a side wall 5b extending from the bottom wall 5a. The second frame 5 is formed of a metal such as aluminum or stainless steel, and the liquid crystal panel 6, the first frame 4, the illumination device 7, and the speaker units 3a and 3b are accommodated therein.

  The first frame 4 is placed on the bottom wall 5 a of the second frame 5 via the cushioning material 16. These buffer materials 16 are formed of an elastic material, for example, resin, rubber or the like. A space between the bottom wall 5a and the speaker units 3a and 3b and surrounded by the cushioning material 16 functions as the second air chamber R2. These second air chambers R2 are air chambers formed on the opposite side of the display unit with respect to the speaker units 3a and 3b. A vent hole 17 is provided in a part of the bottom wall 5a forming the second air chamber R2.

  The speaker units 3 a and 3 b have conductive wires 18, and audio signals are transmitted to the piezoelectric elements 13 through the conductive wires 18. The piezoelectric element 13 that has received the signal vibrates the vibrator 12, and a sound corresponding to the sound signal is generated by the interaction between the vibration and the first air chamber R1 and the second air chamber R2, and this sound is released. The sound is emitted to the outside on the observation side indicated by the arrow A through the sound hole Pb.

  The electro-optical device 1A of the present embodiment can be supplied to the market in the state of the structure shown in FIG. When the electro-optical device 1A is assembled to an electronic device such as a mobile phone, a portable information terminal, an IC recorder, etc., the second frame 5 is fixed to a fixed member of the electronic device, such as a housing or an exterior case. good. As shown in FIG. 1, if the air chamber R2 opposite to the display unit is formed using the second frame 5, no acoustic design is required on the electronic device side. Is advantageous.

  In the present embodiment, the speaker units 3 a and 3 b are fixed to the bottom surface of the first frame 4, so that the liquid crystal display device 2 and the speaker units 3 a and 3 b can be connected to the first frame 4 without using the second frame 5. It can be supported integrally. Therefore, the first frame 4 can be fixed to the fixed member of the electronic device without using the second frame 5. In this case, the second air chamber R2 is formed by any member on the electronic device side. As described above, if the liquid crystal display device 2 and the speaker units 3a and 3b are integrally supported by the first frame 4 without using the second frame 5, the electro-optical device can be further reduced in size.

  In some cases, the electro-optical device 1A can be supplied to the market in the state shown in FIG. The state shown in FIG. 3 is different from the state shown in FIG. 1 in that it has a third frame 21 joined to the upper end of the side wall 5b of the second frame 5. The third frame 21 is formed of the same material as the second frame 5, that is, a metal such as aluminum or stainless steel. The second frame 5 and the third frame 21 are joined by an appropriate joining method such as screwing, spot welding, press-fitting, caulking, or the like while being pressed from both sides with a predetermined pressure as indicated by an arrow B. As a result, the liquid crystal display device 2, the first frame 4, and the buffer material 16 are accommodated between the second frame 5 and the third frame 21 in a biased state, that is, in a state where stress is generated. When assembling the electro-optical device 1A of FIG. 3 to an electronic apparatus, the second frame 5 or the third frame 21 may be fixed to a fixed member of the electronic apparatus.

  In the third frame 21, it is desirable to provide an opening 22 for preventing sound emission in a portion corresponding to the sound emission hole Pb of the sound guide path P provided in the first frame 4. It is also desirable to provide a transparent protective sheet (not shown) between the display surface of the liquid crystal panel 6 and the third frame 21. Such a protective sheet can be formed of, for example, a translucent plastic. If the surface of the liquid crystal panel 6 is covered with a protective sheet, the liquid crystal panel 6 can be protected from mechanical damage.

  Since the electro-optical device 1 </ b> A according to the present embodiment is configured as described above, various types of information can be displayed as images in the display area of the liquid crystal display device 2. Furthermore, various information can be displayed by voice by the speaker units 3a and 3b. This sound is generated by the speaker units 3a and 3b in FIG. 1, and after passing through the sound guide path P, the sound emission provided on the front surface of the first frame 4, that is, the surface on the same side as the display area of the liquid crystal panel 6. It is transmitted from the hole Pb to the outside. Since a plurality of speaker units 3a and 3b are provided, sound can be output by stereo sound.

  According to the electro-optical device 1A of the present embodiment, the liquid crystal display device 2 as a display unit, the first frame 4, and the speaker units 3a and 3b as sounding bodies are integrally coupled, and the speaker units 3a and 3b The air chamber R1 on the display unit side is formed in advance by the first frame 4 in the combined state. For this reason, when the electro-optical device 1A is assembled inside the electronic device, the electro-optical device 1A, which is an integral structure, only needs to be attached to a suitable place inside the electronic device, and the liquid crystal display device 2 and the speaker unit 3a, The overall shape of the electro-optical device 1A can be reduced in size and thickness as compared with the case where 3b is separately incorporated into an electronic apparatus.

  Further, in the electro-optical device 1A according to the present embodiment, the entire two speaker units 3a and 3b are provided so as to fall within the perpendicular space region K0 of the display surface of the liquid crystal panel 6, and therefore the liquid crystal panel 6 of FIG. There is no speaker unit 3a, 3b in the lateral region, and therefore the electro-optical device 1A can be made compact.

  Further, in the electro-optical device 1A of the present embodiment, the liquid crystal display device 2, the first frame 4, and the second frame 5 that accommodates the speaker units 3a and 3b have a container shape. 4 and the speaker units 3a and 3b can be very easily integrated, and the integrated structure can be firmly held.

  If the electro-optical device 1A of the present embodiment has the configuration shown in FIG. 3, that is, in cooperation with the second frame 5, the liquid crystal display device 2, the first frame 4, and the speaker units 3a and 3b are pressed. If the third frame 21 to be sandwiched is further provided, the integrated structure composed of the liquid crystal display device 2, the first frame 4, and the speaker units 3a and 3b can be held extremely firmly.

  Further, in the electro-optical device 1A of the present embodiment, since the speaker units 3a and 3b are arranged on the back surface of the liquid crystal display device 2 with the first frame 4 interposed therebetween, the display on the liquid crystal display device 2 can be easily seen. In addition, the electro-optical device 1A can be made smaller than when the speaker units 3a and 3b are provided in the lateral position of the liquid crystal display device 2.

  Further, in the electro-optical device 1A of the present embodiment, the sound guide path P that guides the sound generated by the speaker units 3a and 3b is provided in the first frame 4, so that the sound output from the speaker units 3a and 3b is externally transmitted. A place for discharging to (i.e., sound emitting hole Pb) can be freely selected. In particular, the sound emission hole Pb can be provided on the same surface as the display area of the liquid crystal display device 2. Thus, if the sound emission hole Pb is provided on the same surface as the display area of the liquid crystal display device 2, it becomes easy for the observer who watches the display to hear the sound.

  In the electro-optical device 1A of the present embodiment, the two speaker units 3a and 3b are arranged in a plane. For this reason, the effect of stereophonic sound can be enhanced.

(Second embodiment of electro-optical device)
FIG. 4 shows another embodiment of the electro-optical device according to the invention. In the electro-optical device 1 </ b> A shown in FIG. 1, the two speaker units 3 a and 3 b as sounding bodies are fixed to the first frame 4. On the other hand, in the electro-optical device 1B shown in FIG. 4, the speaker units 3a and 3b are fixed to the bottom wall 5a of the second frame 5 by fixing the frames 11 of the two speaker units 3a and 3b to the second frame 5. Is supported by. That is, the first frame 4 supports the liquid crystal display device 2 as a display unit, and the second frame 5 supports the speaker units 3a and 3b and the first frame 4 individually.

  The planar structure of the electro-optical device 1B viewed from the direction of arrow A is the same as the planar structure shown in FIG. In FIG. 4, the same members as those in the embodiment of FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

  In the electro-optical device 1A of FIG. 1, since the first frame 4 supports both the liquid crystal display device 2 as a display unit and the speaker units 3a and 3b, the liquid crystal display device 2, the first frame 4, and the speaker are employed. The second frame 5 is not always necessary for connecting the units 3a and 3b together. In contrast, in the electro-optical device 1B shown in FIG. 4, since the speaker units 3a and 3b are supported by the second frame 5, the liquid crystal display device 2, the first frame 4, and the speaker units 3a and 3b are integrated. The second frame is an indispensable requirement for connecting to.

  In the electro-optical device 1B of the present embodiment, the liquid crystal display device 2, the first frame 4, and the speaker units 3a and 3b are integrally coupled by the second frame 5, and therefore, between the liquid crystal display device 2 and the speaker units 3a and 3b. Compared with the case where the liquid crystal display device 2 and the speaker units 3a and 3b are supported by the first frame 4 interposed between the two, a more integrated structure can be formed.

(Third embodiment of electro-optical device)
FIG. 5 shows still another embodiment of the electro-optical device according to the invention. In this embodiment, the same elements as those in the embodiment shown in FIG. In the electro-optical device 1A shown in FIG. 1, two speaker units 3a and 3b as sounding bodies are arranged side by side on a plane so as not to overlap each other. On the other hand, in the electro-optical device 1C shown in FIG. 5, the two speaker units 3a and 3b are arranged so that a part of them overlap each other. Also in the case of this electro-optical device 1C, as shown in FIG. 6, the two speaker units 3a and 3b are entirely in the space area K0 in the perpendicular direction on the surface of the liquid crystal panel 6 on the display area side.

  In FIG. 5, the inside of the first frame 4 is stepped, and one speaker unit 3 b is provided in a step portion on the side close to the liquid crystal display device 2, and the other step portion on the side far from the liquid crystal display device 2 is provided. One speaker unit 3a is provided.

  In this electro-optical device 1C, since the two speaker units 3a and 3b are arranged so that their portions overlap each other, the speaker units 3a and 3b are arranged side by side in a plane like the electro-optical device 1A of FIG. As compared with the above, the size of the electro-optical device in the width direction (that is, the horizontal direction C in FIG. 6) can be further reduced. Further, in the present embodiment, as compared with the case where the speaker units 3a and 3b are arranged in a plane so as not to overlap each other as in the electro-optical device 1A of FIG. The speaker units 3a and 3b can be enlarged to a size that fits in the vertical direction.

(Embodiment 4 of electro-optical device)
FIG. 7 shows still another embodiment of the electro-optical device according to the invention. In this embodiment, the same elements as those in the embodiment shown in FIG. In the electro-optical device 1C shown in FIG. 5, two speaker units 3a and 3b as sounding bodies are arranged so that a part thereof overlaps. On the other hand, in the electro-optical device 1D shown in FIG. 7, the two speaker units 3a and 3b are arranged so as to overlap each other. Also in the case of this electro-optical device 1D, as shown in FIG. 8, the two speaker units 3a and 3b are entirely within the space area K0 in the perpendicular direction on the surface of the liquid crystal panel 6 on the display area side.

  In this electro-optical device 1D, since the two speaker units 3a and 3b are arranged so as to overlap each other, the speaker units 3a and 3b are planar so as not to overlap each other as in the electro-optical device 1A of FIG. Compared to the case where the two speaker units 3a and 3b are arranged so that their parts overlap each other as in the electro-optical device 1C of FIG. 5, the width direction of the electro-optical device (that is, FIG. The size of the left and right direction C) 8 can be further reduced.

  Further, in this embodiment, when the speaker units 3a and 3b are arranged in a plane so as not to overlap each other as in the electro-optical device 1A of FIG. 1, or in the case of two speakers as in the electro-optical device 1C of FIG. Compared with the case where the units 3a and 3b are arranged so that their parts overlap each other, the speaker units 3a and 3b can be further enlarged to a size that can be accommodated in the vertical direction of the electro-optical device (that is, the vertical direction in FIG. 8). it can.

  Further, in the electro-optical device 1D of FIG. 7, the air chamber R1 on the display unit side and the air chamber R2 on the opposite side to the display unit for the two speaker units 3a and 3b are all formed by the first frame 4. Yes. As for the speaker unit 3a far from the liquid crystal display device 2, one end Pa of the sound guide path P communicates with a part of the air chamber R2 opposite to the liquid crystal display device 2, and the other end Pb is on the observation side surface. It is opened and becomes a sound emission hole. As for the speaker unit 3b on the side close to the liquid crystal display device 2, one end Pa of the sound guide path P communicates with a part of the air chamber R1 on the liquid crystal display device 2 side, and the other end Pb is opened to the observation side surface. It is a sound emission hole.

  In the electro-optical device 1A of FIG. 1, the second frame 5 is necessary to form the air chamber R2 on the side opposite to the display unit, or the air chamber R2 is formed when the second frame 5 is not used. It was necessary to prepare some members on the electronic equipment side. On the other hand, in the electro-optical device 1D of FIG. 7, the air chambers R1 and R2 on both the front and back sides of the speaker units 3a and 3b can be formed only by the first frame 4, and any member other than the first frame 4 is unnecessary. . As a result, the electro-optical device can be further reduced in size.

  When the electro-optical device 1D of FIG. 7 is incorporated into an electronic device such as a mobile phone, a portable information terminal, an IC recorder, etc., the first frame 4 is directly fixed to a housing, a machine frame, etc. in the electronic device. It ’s fine. At this time, since the air chambers R1 and R2 are installed in appropriate conditions in advance by the first frame 4, it is not necessary to set conditions for the air chambers on the electronic device side. However, when the electro-optical device 1D is assembled to an electronic device, the liquid crystal display device 2, the first frame 4, and the speaker unit as in the second frame 5 shown in FIG. You may use the 2nd frame 5 which covers each element of 3a, 3b from the outside.

(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, the speaker unit 3a. Although 3b was comprised using the diaphragm 12 and the piezoelectric element 13, a sounding body is not restricted to such a speaker unit, The speaker unit of various structures can be used as needed.

(First Embodiment of Electronic Device)
FIG. 9 shows an embodiment of an electronic apparatus according to the invention. The electronic apparatus 31 shown here includes a housing 32 as a fixed member, and an electro-optical device 1E attached to the housing 32. The electronic device 31 is, for example, a mobile phone, a portable information terminal, an IC recorder, and other various devices, and the housing 32 is an outer case of these devices or a machine frame installed in the outer case. Or any other structure provided as necessary from other electronic devices. It should be noted that if the casing 32 is constituted by any element generally used in ordinary electronic equipment, it is not necessary to prepare a special member for fixing the electro-optical device, which is convenient. is there.

  The electro-optical device 1E is almost the same as the electro-optical device 1A shown in FIG. The electro-optical device 1E is different from the electro-optical device 1A of FIG. 1 only in the second frame 35, and the other members are exactly the same. Accordingly, the same members are denoted by the same reference numerals, and description of those members will be omitted.

  The second frame 35 shown in FIG. 9 has a shape in which the side wall 5b of the second frame 5 shown in FIG. More specifically, the side wall of the second frame 35 is formed so that its upper end is substantially the same as the display surface of the liquid crystal panel 6, and preferably at a position slightly lower than the display surface of the liquid crystal panel 6. ing. Further, the upper end of the side wall of the second frame 35 is partially bent in the lateral direction as necessary to constitute a flange 36. The second frame 35 is in contact with the inner surface of the housing 32 at the flange 36.

  The second frame 35 is fixed to the housing 32 by an appropriate fixing method such as adhesion, screwing, press-fitting, fitting, caulking, or the like with the flange 36 in contact with the housing 32. In this fixed state, the liquid crystal display device 2, the first frame 4, and the buffer material 16 are desirably housed in the second frame 35 in an urged state under an appropriate pressing force. If such an urging state is realized, the liquid crystal display device 2, the first frame 4, and the speaker units 3 a and 3 b can be firmly fixed inside the electronic device 31.

  In the electronic apparatus 31 according to the present embodiment, the liquid crystal display device 2, which is a component of the electro-optical device 1E, the first frame 4, and the speaker units 3a and 3b are integrally coupled. The air chambers R1 and R2 for this purpose are formed in advance by the first frame 4 and the second frame 35 in the combined state. For this reason, when the electro-optical device 1E is assembled inside the housing 32, the electro-optical device 1E that is an integral structure only needs to be attached to an appropriate position of the housing 32, and the liquid crystal display device 2 and the speaker unit 3a, Compared to the case where 3b is separately incorporated in the housing 32, the overall shape of the electro-optical device 1E and the electronic apparatus can be reduced in size and thickness.

(Second Embodiment of Electronic Device)
FIG. 10 shows a block diagram of an embodiment of an electronic apparatus according to the present invention. The electronic apparatus shown here includes an electro-optical device 61 and a control circuit 70 that controls the electro-optical device 61. The electro-optical device 61 includes a liquid crystal panel 66 as an electro-optical panel, a drive circuit 72 formed of a semiconductor IC or the like, and a speaker unit 63. A plurality of speaker units 63 are provided.

  The control circuit 70 includes a display information output source 73, a display information processing circuit 74, a power supply circuit 76, a timing generator 77, and an audio information processing circuit 78. The display information output source 73 includes a memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory), a storage unit such as a magnetic recording disk or an optical recording disk, and a tuning circuit that tunes and outputs a digital image signal. Have The display information output source 73 supplies display information to the display information processing circuit 74 in the form of an image signal or the like in a predetermined format based on various clock signals generated by the timing generator 77.

  The display information processing circuit 74 includes various known circuits such as a serial-parallel conversion circuit, an amplification / inversion circuit, a rotation circuit, a gamma correction circuit, and a clamp circuit, and executes processing of input display information to obtain image information thereof. Are supplied to the drive circuit 72 together with the clock signal CLK. The drive circuit 72 includes a scanning line drive circuit, a data line drive circuit, and an inspection circuit. The power supply circuit 76 supplies a predetermined voltage to each of the above components. The audio information processing circuit 78 transmits an audio signal to the speaker unit 63 and generates audio from the speaker unit 63.

  The electro-optical device 61 can be configured by, for example, the electro-optical device 1A shown in FIG. 1, the electro-optical device 1B shown in FIG. 4, the electro-optical device 1C shown in FIG. 5, the electro-optical device 1D shown in FIG. In these electro-optical devices, for example, in FIG. 1, a liquid crystal display device 2 as a display unit, a first frame 4, and speaker units 3a and 3b as sounding bodies are integrally coupled, and the speaker units 3a and 3b The air chamber R1 on the display unit side is formed in advance by the first frame 4 in the combined state. For this reason, when the electro-optical device 1A is assembled inside the electronic device, the electro-optical device 1A, which is an integral structure, only needs to be attached to a suitable place inside the electronic device, and the liquid crystal display device 2 and the speaker unit 3a, The overall shape of the electro-optical device 1A can be reduced in size and thickness as compared with the case where 3b is separately incorporated into an electronic apparatus. The fact that the shape of the electro-optical device 1A can be reduced in size and thickness means that the overall shape of the electronic apparatus can also be reduced in size and thickness.

(3rd Embodiment of an electronic device)
FIG. 11 shows a mobile phone which is an example of an electronic apparatus according to the invention. A cellular phone 80 shown here has a main body portion 81 and a display body portion 82 provided on the main body portion 81 so as to be opened and closed. An electro-optical device 83 is arranged inside the display body portion 82, and various displays relating to telephone communication can be visually recognized on the display body portion 82 on the display screen 84. Operation buttons 86 are arranged on the main body 81.

  An antenna 87 is attached to one end portion of the display body portion 82 so as to be stretchable. A speaker (not shown) is arranged inside the receiver unit 88 provided at the upper part of the display body unit 82. In addition, a microphone (not shown) is incorporated in the transmitter 89 provided at the lower end of the main body 81. A control unit for controlling the operation of the electro-optical device 83 is stored in the main body 81 or the display body unit 82 as a part of the control unit that controls the entire mobile phone or separately from the control unit. Is done.

  The electro-optical device 83 can be configured by, for example, the electro-optical device 1A shown in FIG. 1, the electro-optical device 1B shown in FIG. 4, the electro-optical device 1C shown in FIG. 5, the electro-optical device 1D shown in FIG. The sound emission holes Pb of these electro-optical devices are arranged at positions corresponding to the earpiece 88 in FIG. 11, for example. A member to be fixed for fixing these electro-optical devices in the mobile phone 80 is an outer case of the mobile phone 80, an appropriate housing in the outer case, an appropriate frame in the outer case, or the like. be able to.

  With respect to the electro-optical device, for example, in FIG. 1, a liquid crystal display device 2 as a display unit, a first frame 4, and speaker units 3a and 3b as sounding bodies are integrally coupled, and the speaker units 3a and 3b. The air chamber R1 on the display side for the purpose is previously formed by the first frame 4 in the combined state. For this reason, when the electro-optical device 1A is assembled inside the electronic device, the electro-optical device 1A, which is an integral structure, only needs to be attached to a suitable place inside the electronic device, and the liquid crystal display device 2 and the speaker unit 3a, The overall shape of the electro-optical device 1A can be reduced in size and thickness as compared with the case where 3b is separately incorporated into an electronic apparatus. The fact that the shape of the electro-optical device 1A can be reduced in size and thickness means that the overall shape of the mobile phone 80 can also be reduced in size and thickness.

(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 the 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, A pager, an electronic notebook, a calculator, a word processor, a workstation, a video phone, a POS terminal, and other various devices can be considered.
An electro-optical device related to the present invention includes a display unit having a display region, a plurality of sounding bodies that are arranged to overlap the display unit and generate sound, and are arranged between the display unit and the sounding body. And a first frame that holds the display unit, the first frame forming air chambers for the plurality of sounding bodies, and guides corresponding to each of the plurality of sounding bodies in the first frame. A sound path and a sound emission hole are provided.
In the above configuration, the “display unit” can be configured by any display means. As such display means, a liquid crystal display device, an EL display device, a plasma display device, and other display devices can be applied. Further, the “sound generator” can be constituted by a speaker, for example. The first frame can be formed of plastic, metal, or the like. Since this first frame forms an air chamber for a plurality of sounding bodies, it may have a complicated shape. In such a case, it is desirable to form the first frame by resin molding using plastic as a material.
According to the electro-optical device having the above-described configuration, the display unit is held by the first frame, the first frame is disposed between the display unit and the sounding body, and the air chamber for the sounding body is formed by the first frame. A sound guide path and a sound emission hole are formed in the first frame. For this reason, when the electro-optical device is assembled inside the electronic device, the display unit, the first frame, and the sounding body need only be attached to a suitable place inside the electronic device as one unit. As compared with the case where the device is separately incorporated in the electronic device, the overall shape of the electro-optical device and the electronic device can be reduced in size and thickness.
Further, according to this electro-optical device, since the air chamber, the sound guide path, and the sound emission hole are formed by the first frame itself, it is not necessary to perform the design related to them on the electronic device side. In addition, the overall shape of the electronic device can be reduced in size and thickness. In addition, since this electro-optical device uses a plurality of sounding bodies, stereo sound can be output.
Next, in the electro-optical device relating to the present invention, the display unit, the first frame, and the sounding body are integrally coupled by the display unit and the sounding body being supported by the first frame. It is desirable to do. In this way, since the integrated structure of the electro-optical device can be realized without using a frame other than the first frame, the electro-optical device can be further reduced in size.
Next, in the electro-optical device related to the invention, it is preferable that the first frame forms both an air chamber on the display unit side and an air chamber on the opposite side to the display unit for the sounding body. By doing so, it is not necessary to use any member other than the first frame in order to form an air chamber for the sounding body, so that the electro-optical device can be further reduced in size.
Next, the electro-optical device according to the present invention further includes a second frame that individually supports the sounding body and the first frame, and the display unit, the first frame, and the second frame are supported by the second frame. It is desirable that the sounding bodies are combined together. According to this configuration, since the display unit, the first frame, and the sounding body are integrally coupled by the second frame, the integrated structure can be made a firm structure.
Next, in the electro-optical device according to the present invention, it is desirable that the second frame is an air chamber for the plurality of sounding bodies and forms an air chamber on the side opposite to the display unit. It is important in terms of acoustic design to provide air chambers on both the display unit side and the opposite side of the display unit with respect to the sounding body. Among these air chambers, the air chamber on the display unit side is formed by the first frame. On the other hand, the air chamber on the side opposite to the display portion can be formed by the second frame, or when the second frame is not used, the air chamber can be formed by using components of the electronic device. In this case, if the air chamber is formed by the second frame that is a component of the electro-optical device, no acoustic design is required on the electronic device side, which is very advantageous for the electronic device.
Next, in the electro-optical device related to the invention, it is desirable that the second frame has a container shape that houses the display unit, the first frame, and the plurality of sounding bodies. In this way, it is very easy to make the display unit, the first frame, and the plurality of sounding bodies all in an integrated structure, and the integrated structure can be firmly held.
Next, it is preferable that the electro-optical device related to the present invention further includes a third frame that holds the display unit, the first frame, and the sounding body in a pressed state in cooperation with the second frame. In this way, an integrated structure composed of the display unit, the first frame, and the plurality of sounding bodies can be held extremely firmly.
Next, in the electro-optical device related to the present invention, it is preferable that the sounding body is disposed on a back surface of the display unit with the first frame interposed therebetween. This makes it easier to see the display on the display unit. In addition, the electro-optical device can be made smaller as compared with the case where the sounding body is provided in the lateral position of the display unit.
Next, in the electro-optical device related to the invention, it is desirable that the sound emitting hole is opened on the same surface as the display area of the display unit. This makes it easier for the observer watching the display to hear the sound.
Next, in the electro-optical device related to the present invention, it is desirable that the plurality of sound generators are arranged so that a part thereof overlaps each other. By doing so, the size of the electro-optical device in the width direction can be reduced. Further, the plurality of sounding bodies can be arranged so that the whole of them overlaps each other. By doing so, the size of the electro-optical device in the width direction can be further reduced.
Next, an electronic apparatus related to the present invention includes an electro-optical device and a fixed member to which the electro-optical device is attached, and the electro-optical device is an electro-optical device having the above-described configuration. And
According to the electro-optical device used in the electronic apparatus, the display unit is held by the first frame, the first frame is arranged between the display unit and the sounding body, and the air chamber for the sounding body is the first. A sound guide path and a sound emission hole are formed in the first frame. For this reason, when the electro-optical device is assembled inside the electronic device, the display unit, the first frame, and the sounding body need only be attached to a suitable place inside the electronic device as one unit. The overall shape of the electronic device can be reduced in size and thickness as compared with the case where the electronic device is separately incorporated into the electronic device.
Further, according to this electro-optical device, since the air chamber, the sound guide path, and the sound emission hole are formed by the first frame itself, it is not necessary to perform the design related to them on the electronic device side. In addition, the overall shape of the electronic device can be reduced in size and thickness. In addition, since this electronic device uses a plurality of sound generators, stereo sound can be output.
Next, in the above electronic device, it is preferable that the fixed member is an exterior case of the electronic device. This eliminates the need for newly preparing a member for attaching the electro-optical device with respect to the electronic apparatus, which is advantageous in terms of component costs.

  The electro-optical device according to the present invention is suitably used as a display device when performing various displays on a mobile phone, a portable information terminal, an IC recorder, and other electronic devices. In particular, it is suitably used for a device that displays an image as well as an audio. The electronic device according to the present invention is used as a consumer device such as a mobile phone, a portable information terminal, an IC recorder, etc., a measuring instrument, or other industrial devices.

1 is a cross-sectional view showing an embodiment of an electro-optical device according to the invention. FIG. 2 is a plan view according to an arrow A of the electro-optical device in FIG. 1. FIG. 2 is a cross-sectional view illustrating a usage example of the electro-optical device of FIG. 1. FIG. 6 is a cross-sectional view showing another embodiment of the electro-optical device according to the invention. FIG. 6 is a cross-sectional view showing still another embodiment of the electro-optical device according to the invention. FIG. 6 is a plan view according to an arrow A of the electro-optical device in FIG. 5. FIG. 6 is a cross-sectional view showing still another embodiment of the electro-optical device according to the invention. FIG. 8 is a plan view according to an arrow A of the electro-optical device in FIG. 7. It is sectional drawing which shows one Embodiment of the electronic device which concerns on this invention. It is a block diagram which shows other embodiment of the electronic device which concerns on this invention. It is a perspective view which shows other embodiment of the electronic device which concerns on this invention.

Explanation of symbols

  1A, 1B, 1C, 1D, 1E. Electro-optical device, 2 ... liquid crystal display device (display unit), 3a, 3b ... speaker unit (sound generator), 4 ... first frame, 5 ... second frame, 6 ... liquid crystal panel (electro-optical panel), 7 ... illumination Device: 11 ... Frame, 12 ... Vibrator, 13 ... Piezoelectric element, 16 ... Buffer material, 17 ... Vent, 18 ... Conductive wire, 21 ... Third frame, 22 ... Opening, 31 ... Electronic device, 32 ... Housing , 33 ... vent hole, 35 ... second frame, 36 ... flange, 62 ... liquid crystal display device (display part), 63 ... speaker unit, 66 ... liquid crystal panel, 80 ... mobile phone (electronic device), 81 ... main body part, 82 ... Display body part, 83 ... Electro-optical device, 84 ... Display screen, 86 ... Operation button, 87 ... Antenna, 88 ... Receiver part, 89 ... Transmitter part, K0 ... Right angle space area, P ... Sound guide path, Pa ... one end, Pb ... sound emission hole, Q ... recess, R1, R2 ... air chamber.

Claims (10)

A display unit having a display area;
A sound generator that is arranged to overlap the back side of the display unit and generates sound,
A first frame disposed between the display unit and the sounding body and holding the display unit;
A second frame that supports the first frame from a side opposite to the display unit side of the first frame via a cushioning material;
An electro-optical device, wherein at least the first frame or the second frame, the sounding body, and the cushioning material form an air chamber that is a space in surface contact with the sounding body.   2. The electro-optical device according to claim 1, wherein the sounding body is fixed to the first frame.   2. The electro-optical device according to claim 1, wherein the sounding body is fixed to the second frame.   2. The electro-optical device according to claim 1, wherein the cushioning material is interposed between the sounding body and the second frame.   3. The electro-optical device according to claim 1, further comprising a third frame that holds the first frame in a pressed state in cooperation with the second frame.   6. The electro-optical device according to claim 1, wherein the second frame has a shape of a container that accommodates the display unit, the first frame, and the sounding body. Optical device.   The electro-optical device according to claim 1, wherein a plurality of the sounding bodies are provided, and the plurality of sounding bodies are arranged so as not to overlap each other in a plane. An electro-optical device.   7. The electro-optical device according to claim 1, wherein a plurality of the sounding bodies are provided, and the plurality of sounding bodies are arranged so that at least a part thereof overlaps with each other in a plane. An electro-optical device. An electro-optical device comprising: an electro-optical device; and a fixed member to which the electro-optical device is attached, wherein the electro-optical device is the electro-optical device according to claim 1. machine.   The electronic device according to claim 9, wherein the fixed member is an exterior case.

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