JP2008191360A - Mounting case, electro-optical device, and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging case capable of obtaining an excellent heat dissipation effect, and to provide an electro-optical device and an electronic apparatus. <P>SOLUTION: In the packaging case for storing an electro-optical panel 100, a first through-hole 231 along a direction almost parallel to the side surface portion 20b of the electro-optical panel 100 and a second through-hole 232 which crosses the first through-hole 231 and whose one opening faces the side surface portion 20b are formed in the portion facing the side surface portion 20b of the electro-optical panel 100, of a frame-like case member 200 surrounding the electro-optical panel. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mounting case that houses an electro-optical panel, an electro-optical device including the mounting case, and an electronic apparatus including the electro-optical device.

In recent years, an electro-optical device, which is a display device including an electro-optical panel such as a liquid crystal panel or a plasma display panel, has a tendency to increase power consumption with the trend toward larger screens, higher luminance, and higher resolution. For this reason, a cooling structure to cope with an increase in power consumption is important in the electro-optical device. For example, in the plasma display device disclosed in Patent Document 1, heat radiation holes are provided on the upper and lower surfaces of the housing, and cooling is performed by the flow of air between the upper and lower heat radiation holes.
JP 2000-89682 A

  By the way, when an electro-optical panel such as a liquid crystal panel made of a substrate such as glass or quartz is disposed in an electronic apparatus such as a projection display device, for example, in order to facilitate fixing and adjustment of the mounting position. The electro-optical panel is handled in a state of being housed in a frame-shaped mounting case. The mounting case is provided with a screw hole so that the electro-optical panel can be easily fixed at a predetermined position in the projection display device.

  In addition, projection display devices tend to employ high-power lamps as light source lamps in order to achieve high brightness and high resolution of projected images. A halogen lamp is known as this light source lamp. A light source lamp typified by this halogen lamp can obtain high-luminance light, but emits intense heat rays from the lamp.

  For this reason, in the projection display device, even if the housing is provided with a heat dissipation hole as in Patent Document 1, the electro-optical panel is released from the lamp because the electro-optical panel is covered with the mounting case. There is a problem that the temperature is easily increased by heat rays. When the electro-optical panel is heated, the display characteristics and durability of the electro-optical panel are adversely affected.

  Accordingly, the present invention has been made in view of the above circumstances, and an object thereof is to provide a mounting case, an electro-optical device, and an electronic apparatus that can obtain a good heat dissipation effect.

  A mounting case according to the present invention includes a case member that accommodates an electro-optical panel, and a hollow portion is formed in a portion of the case member that faces the side surface portion of the electro-optical panel. To do.

  The mounting case of the present invention is a mounting case that holds and accommodates an electro-optical panel between a case member and a cover member that comes into contact with the case member, and faces the side portion of the electro-optical panel. The part has a hollow part, and the hollow part is constituted by a space surrounded by the inner wall surface of the groove part provided in the contact surface part of the case member that contacts the cover member, and the cover member. It is characterized by that.

  According to such a configuration of the present invention, since the cooling air flows through the hollow portion, the case member is cooled, and a good heat dissipation effect of the electro-optical panel can be obtained.

  In the present invention, it is preferable that the hollow portion is a first through hole provided so as to penetrate the case member in a direction along a side surface portion of the electro-optical panel.

  According to such a configuration, since the cooling air can pass through the first through hole without stagnation, the case member is further cooled, and a good heat dissipation effect of the electro-optical panel can be obtained. .

  Further, the present invention provides a second through hole provided so as to penetrate the case member so as to intersect the first through hole and so that one opening portion faces the side surface portion of the electro-optical panel. It is preferable to have.

  According to such a configuration, the cooling air is guided to the periphery of the electro-optical panel, and then flows to the outside of the mounting case through the second through hole without stagnation. As a result, the electro-optical panel can be cooled more effectively.

  The electro-optical device according to the present invention is characterized in that the electro-optical panel is accommodated in the mounting case.

  According to such a configuration, since it is possible to cool the electro-optic panel more effectively than in the past, changes in display characteristics and durability caused by the electro-optic panel becoming high temperature It is possible to prevent a decrease in the above.

  According to another aspect of the invention, an electronic apparatus includes the electro-optical device.

  According to such a configuration, an electronic device with higher reliability and higher display quality can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The electro-optical device in the following embodiments is used in a projection display device as an electronic apparatus, and a transmissive liquid crystal display panel is applied as an electro-optical panel. In each drawing used for the following description, the scale is different for each member in order to make each member a size that can be recognized on the drawing. FIG. 1 is a schematic diagram of a liquid crystal projector. FIG. 2 is an exploded perspective view showing the configuration of the electro-optical device. FIG. 3 is a perspective view of the case member as viewed from the side of the recess that houses the electro-optical panel. 4 is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a diagram showing a flow of cooling air for cooling the electro-optical device.

  First, the configuration of a liquid crystal projector as a projection display device will be briefly described with reference to FIG. The liquid crystal projector 1100 includes light valves 100R, 100G, and 100B, which are three electro-optical panels that modulate the color light beams R, G, and B.

  In the liquid crystal projector 1100, when projection light is emitted from a lamp unit 1102 of a white light source such as a metal halide lamp, light components R, G, and B corresponding to the three primary colors of RGB are obtained by three mirrors 1106 and two dichroic mirrors 1108. And are guided to the light valves 100R, 100G, and 100B corresponding to the respective colors.

  In particular, the B light is guided through a relay lens system 1121 including an incident lens 1122, a relay lens 1123, and an exit lens 1124 in order to prevent light loss due to a long optical path. The light components corresponding to the three primary colors modulated by the light valves 100R, 100G, and 100B are synthesized again by the dichroic prism 1112 and then projected as a color image on the screen 1120 via the projection lens 1114.

  In addition, the liquid crystal projector 1100 is equipped with a blower fan 1141 that blows air to the light valves 100R, 100G, and 100B. The blower fan 1141 has a purpose of alleviating heat accumulation in the light valves 100R, 100G, and 100B mainly caused by strong light emitted from the lamp unit 1102.

  In this embodiment, in particular, a flow path (not shown) is formed so that the wind sent from the blower fan 1141 reaches each of the light valves 100R, 100G, and 100B effectively, and each light valve 100R, 100G, and 100B is formed. On the other hand, the wind is effectively applied in a predetermined direction.

  In the following, since each of the light valves 100R, 100G, and 100B is a transmissive liquid crystal panel having the same configuration, these are collectively referred to as the electro-optical panel 100 and will be described collectively.

  As shown in FIG. 2, the electro-optical device 1 according to the present embodiment includes an electro-optical panel 100 housed in a mounting case 2. The mounting case 2 includes a case member 200 and a cover member 300. The electro-optical panel 100 is sandwiched between the case member 200 and the cover member 300, and the electro-optical panel 100 is placed inside the liquid crystal projector 1100 described above. It is for positioning and fixing.

  The electro-optical panel 100 is a transmissive liquid crystal panel in which a liquid crystal layer is sealed between a TFT array substrate 10 and a counter substrate 20, each of which is a pair of substrates formed of a transparent material such as glass and quartz. In addition to the liquid crystal projector described above, it is also used as a light valve for a micro display projection television.

  The electro-optical panel 100 transmits light by changing the orientation and order of the molecular assembly of the liquid crystal layer by changing the voltage level between the TFT array substrate 10 and the counter substrate 20 in the image display region 10a. Modulates light to enable gradation display. The TFT array substrate 10 and the counter substrate 20 have rectangular shapes of different sizes, and the counter substrate 20 is formed smaller than the TFT array substrate 10.

  An external circuit connection terminal (not shown) is provided in the vicinity of one side of the surface on the counter substrate 20 side of the TFT array substrate 10 of the electro-optical panel 100. On this external circuit connection terminal, a flexible printed circuit board ( Hereinafter, an FPC (referred to as a “Flexible Printed Circuit”) 101 is mounted. The FPC 101 is parallel to the surface of the TFT array substrate 10 on the counter substrate 20 side, and extends from the side where the external circuit connection terminal is provided in a direction toward the outside of the electro-optical panel 100. For example, when the electro-optical panel 100 is used in a projection display device, the electro-optical panel 100 is connected to a control device (not shown) via the FPC 101, and based on image signals and various drive signals transmitted from the control device, Display an image.

  The electro-optical panel 100 is transparent for preventing dust from adhering to the TFT array substrate 10 and the counter substrate 20 on the outer surfaces of the opposing surfaces of the TFT array substrate 10 and the counter substrate 20. A simple dustproof substrate may be bonded.

  As shown in FIGS. 2 to 4, the case member 200 is a substantially rectangular frame-shaped member for housing the electro-optical panel 100, and includes a mounting surface portion 206 that defines a thickness and an exterior surface portion 207. The surface width is formed larger than the thickness of the electro-optical panel 100. The case member 200 is made of aluminum, copper, magnesium, or an alloy thereof that is a material having a relatively high thermal conductivity, and is made of pure aluminum in the present embodiment. The material of the mounting case is not limited to metal, and may be resin such as engineer plastic or ceramic. At the four corners of the frame-shaped case member 200, through holes 208 for attaching the case member 200 to a projection display device or the like with screws are formed.

  In addition, the case member 200 is formed with an accommodating portion 201 that is a recess for accommodating the electro-optical panel 100. The accommodating portion 201 is a concave portion having a stepped portion having two bottom portions as viewed from the opening direction, that is, one step. In other words, as shown in FIG. 4, the accommodating portion 201 is formed with a first-stage recess 212 for accommodating the TFT array substrate 10 on the front side when viewed from the side where the electro-optical panel 100 is inserted. A shape in which a second-stage recess 222 for accommodating the counter substrate 20 having an opening smaller than that of the first-stage recess 212 is formed on the bottom surface portion 211 of the first-stage recess 212. Have Further, a window portion provided as a rectangular through hole in a region corresponding to the image display region 10 a of the electro-optical panel 100 when the electro-optical panel 100 is accommodated in the bottom surface portion 221 of the second-stage recess 222. 202 is formed.

  Further, the case member 200 is formed with an FPC opening 220 so that the FPC 101 extends outside the case member 200 without being bent. The FPC opening 220 is a notch provided on one side of the frame-shaped case member 200 and is formed larger than the width of the FPC 101.

  Further, the first through-hole which is a hollow portion formed along the direction in which each side extends on the two sides of the case member 200 which are in contact with and opposite to the side where the FPC opening 220 is formed. 231 is provided. That is, as shown in FIG. 4, the first through-holes 231 are opposed to each other of the frame-like case members 200 so as to be along the side surface portion 20 b of the electro-optical panel 100 in a state of being accommodated in the accommodating portion 201. It is drilled in the side. In other words, in the electro-optical device 1, the case member 200 that houses the electro-optical panel 100 has a pair of first through holes 231 that sandwich the electro-optical panel 100 along the side surface portion 20 b of the electro-optical panel 100. The pair of first through holes 231 are provided in the extending direction of the FPC 101.

  Further, two sides of the case member 200 that are in contact with and opposite to the side where the FPC opening 220 is formed, that is, two sides where the first through-hole 231 is formed cross the first through-hole 231. In addition, a second through-hole 231 is provided so as to communicate the inside of the accommodating portion 201 and the outer surface of the case member 200. The second through hole 231 is provided so that the opening is located at a position facing the side surface 20 b of the electro-optical panel 100 in a state where the electro-optical panel 100 is accommodated in the accommodating portion 201. That is, in the electro-optical device 1, the side surface portion 20 b of the electro-optical panel 100 is exposed to the outside of the electro-optical device 1 through the second through hole 231.

  In addition, a claw portion 230 is formed at the approximate center of the outer side surface portion of the two sides in contact with the side where the FPC opening 220 is formed in the case member 200.

  On the other hand, the cover member 300 that constitutes the mounting case 2 together with the case member 200 described above is a member having a substantially U-shaped cross-section formed by bending a flat plate, and a main body on a frame having a rectangular window 301. And hook portions 302 formed on both sides of the main body.

  The cover member 300 is positioned and fixed to the attachment surface 206 side of the case member 200 by the hook portion 302 being locked to the claw portion 230 of the case member 200. The window 301 of the cover member 300 is formed so that the image display area 10 a of the electro-optical panel 100 is exposed when the electro-optical panel 100 is sandwiched between the cover member 300 and the case member 200. The cover member 300 is made of metal or resin.

  The case member 200, the cover member 300, and the electro-optical panel 100 described above are fixed to each other with an adhesive to constitute the electro-optical device 1. Further, as shown in FIG. 4, in a state where the electro-optical panel 100 is fixed in the housing part 201 of the case member 200 via an adhesive, the side surface part 20 b of the electro-optical panel 100 and the inner wall surface part of the housing part 201 The dimensions of the electro-optical panel 100 and the case member 200 are defined such that a gap is formed between the main surface of the counter substrate 20 of the electro-optical panel 100 and the bottom surface portion 221 of the housing portion 201.

  In a state where the electro-optical device 1 is disposed in the liquid crystal projector 1100, the cooling air AF1 sent by the blower fan 1141 is substantially parallel to the main surface of the electro-optical panel 100 as shown in FIG. And it is supplied so that it may flow in the direction along the extending direction of FPC101.

  That is, the cooling air AF1 sent by the blower fan 1141 flows along the direction in which the first through hole 231 provided in the case member 200 is formed. In other words, the electro-optical device 1 is disposed in the liquid crystal projector 1100 so that the opening on one end side of the first through hole 231 provided in the mounting case 200 faces in the direction facing the flow of the cooling air AF1. Yes. The manner in which the cooling air AF1 flows along the first through hole 231 is the same in all of the light valves 100R, 100G, and 100B that are the three electro-optical devices 1 disposed in the liquid crystal projector 1100. It is.

  Next, operations and effects of the present embodiment having the above-described configuration will be described. As shown in FIG. 5, in the liquid crystal projector 1100, the cooling air AF <b> 1 sent by the blower fan 1141 is substantially parallel to a pair of sides in contact with the side on which the FPC 101 of the electro-optical panel 100 is mounted, and the FPC 101. It flows in the extending direction.

  Here, since the first through hole 231 of the case member 200 is provided such that the opening on one end side faces the flow of the cooling air AF1, a part of the cooling air AF1 is part of the first through hole 231. It passes through the hole 231 (AF2 in FIG. 5).

  Further, a part of the cooling air AF1 flows so as to enter the housing portion 201 of the case member 200 through a gap between the case member 200 and the electro-optical panel 100 (AF4 in FIG. 5).

  On the other hand, the cooling air AF1 not only flows on the main surface of the electro-optical panel 100, but also flows on the outer surface portion where the claw portion 230 of the case member 200 is formed, as indicated by AF3 in FIG. .

  As described above, a part of the cooling air AF1 (AF3) flows along the outer surface portion where the second through-hole 231 communicating with the inside of the housing portion 201 is formed, so that the inside of the housing portion 201 of the case member 200 is obtained. The air that flows in (AF4) passes through the second through-hole 231 and is discharged to the outer side surface portion of the case member 200 so as to be sucked out without stagnation in the accommodating portion (AF5 in FIG. 5).

  As described above, in the present embodiment, in the mounting case 2 that accommodates the electro-optical panel 100, the electric power of the frame-shaped case member 200 in which the accommodating portion 201 that is a recess that accommodates the electro-optical panel 100 is formed. A first through hole 231 and a second through hole 232 as a hollow part are formed in a part facing the side surface part 20 b of the optical panel 100.

  With this configuration, in the present embodiment, the cooling air AF1 flows through the first through hole 231 and the second through hole 232 provided in the case member 200, whereby the mounting case 200 is cooled. Therefore, a good heat dissipation effect for the electro-optical panel 100 can be obtained.

  In the present embodiment, in particular, the second through-hole 232 is provided, so that a part of the cooling air AF1 flows through the periphery of the electro-optical panel 100 without stagnation. Therefore, the electro-optical panel 100 can be cooled more effectively.

  Further, in the liquid crystal projector 1100 that is the electronic apparatus of the present embodiment, the light valves 100R, 100G, and 100B that are the electro-optical panel 100 can be cooled more effectively than the conventional ones. It becomes possible to prevent a change in display characteristics and a decrease in durability due to the high temperatures of 100R, 100G, and 100B.

  In the above-described embodiment, the hollow portion of the mounting case 2 that houses the electro-optical panel 100 is formed by drilling a through hole in the case member 200. For example, as shown in FIG. In addition, the hollow portion may be formed by a combination of the case member and the cover member.

  More specifically, as shown in FIG. 6, grooves 252 and 253 are formed on the contact surface 251 of the case member 250 on the contact surface 251 with which the cover member 350 contacts, and facing the side surface of the electro-optical panel. Form it. Here, the groove 252 is formed in a direction along the side surface portion of the electro-optical panel, and the groove 253 intersects the groove 252 and is formed over the entire contact surface 251. Then, after fixing the electro-optical panel in the housing portion of the case member 250 via an adhesive, the cover member 350 is fixed on the contact surface portion 251.

  In such a configuration, a hollow portion that is a space surrounded by the inner wall surfaces of the groove portions 252 and 253 and the cover member 350 is formed, and the first through hole 231 and the first through hole 231 in the above-described embodiment are formed. A configuration similar to that of the second through hole 232 is obtained. Therefore, even in the modification shown in FIG. 6, the same effects as those of the above-described embodiment can be obtained. Further, in this modification, the case member can be easily formed without post-processing by die casting or forging because a through hole is not formed in the case member but a groove portion may be formed on the plane of the case member. Can be manufactured.

  In the above-described embodiment, the first through hole 231 is formed substantially parallel to the side surface portion 20b of the electro-optical panel 100, and the second through hole 232 is formed with respect to the side surface portion 20b of the electro-optical panel 100. Although formed so as to be substantially orthogonal, these through holes constituting the hollow portion of the mounting case 2 are formed at an angle different from that of the above-described embodiment according to the flow of the cooling air. It may also be formed in a tapered shape. Needless to say, the numbers of the first through holes 231 and the second through holes 232 are appropriately determined in consideration of the heat dissipation effect, and are not limited to the illustrated form.

  In addition, the electro-optical device is not limited to the case where a transmissive liquid crystal panel is used as the electro-optical panel, but may be a reflective or transflective liquid crystal panel. A light device or the like may be included. In addition to the liquid crystal panel according to the present embodiment, the present invention also includes an electrophoretic device such as electronic paper, an EL (Electro-Luminescence) display device, and a device including an electron emission circuit element (Field Emission Display and Surface-Conduction). It belongs to the technical field of electro-optical devices such as Electron-Emitter Display.

  Note that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope or spirit of the invention that can be read from the claims and the entire specification. Cases, electro-optical devices, and electronic devices are also included in the technical scope of the present invention.

It is a schematic diagram of a liquid crystal projector. FIG. 3 is an exploded perspective view illustrating a configuration of an electro-optical device. It is the perspective view which looked at the case member from the recessed part side which accommodates an electro-optical panel. It is IV-IV sectional drawing of FIG. It is a figure which shows the mode of the flow of the cooling air which cools an electro-optical apparatus. It is a perspective view which shows the modification of a mounting case.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Electro-optical device, 2 Mounting case, 100 Electro-optical panel, 10 TFT array substrate, 20 Opposite substrate, 20b Side surface part, 101 FPC, 200 Case member, Storage part 201, 231 1st through-hole, 232 2nd through-hole Hole, 300 cover member

Claims (6)

A case member for accommodating the electro-optic panel;
A mounting case, wherein a hollow portion is formed in a portion of the case member that faces the side surface portion of the electro-optical panel.   2. The mounting case according to claim 1, wherein the hollow portion is a first through hole provided through the case member in a direction along a side surface portion of the electro-optical panel.   It has a 2nd through-hole provided so that the said case member might be penetrated so that it might cross | intersect the said 1st through-hole, and one opening part faced the side part of the said electro-optical panel. The mounting case according to claim 2. A mounting case that holds and accommodates an electro-optical panel between a case member and a cover member that contacts the case member,
A hollow portion at a portion facing the side surface portion of the electro-optic panel;
The hollow portion is configured by a space surrounded by an inner wall surface of a groove portion provided in an abutting surface portion of the case member that abuts on the cover member, and the cover member.   An electro-optical device, wherein the electro-optical panel is accommodated in the mounting case according to claim 1. An electronic apparatus comprising the electro-optical device according to claim 5.

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