JP2008076595A - Packaging case for electro-optical device, and display module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging case for an electro-optical device which facilitates the work of housing the electro-optical device, and to provide a display module. <P>SOLUTION: In the packaging case 200 having a housing part 201 being a recessed part for housing the electro-optical device 500, a forwardly tapered taper part 213, in which the size of an opening is extended toward an opening direction, is formed in a position facing a side face part of the electro-optical device 500, of a side face part of the housing part 201, and the electro-optical device 500 is positioned in a plane direction by a corner part 214 between a bottom part 211 and the taper part 213. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electro-optical device mounting case and a display module, and more particularly to an electro-optical device mounting case and a display module that house an electro-optical device in a recess.

In general, when an electro-optical device 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 device is handled in a state of being accommodated in a mounting case. The mounting case is provided with a screw hole so that the liquid crystal panel can be easily fixed at a predetermined position in the projection display device. A display module in which the liquid crystal panel is housed in a mounting case (support frame) as described above is disclosed in, for example, Japanese Patent Application Laid-Open No. 2005-208079.
JP 2005-208079 A

  In general, the housing portion for housing the liquid crystal panel of the mounting case is a recess formed so as to surround the outer periphery of the flat liquid crystal panel. For example, as disclosed in JP 2005-208079 A, a liquid crystal panel The side surface portion of the recess has a shape that fits outside. That is, in the display module, the liquid crystal panel is fitted in the recess of the mounting case. For this reason, when assembling the display module, the liquid crystal panel must be inserted while being positioned with respect to the housing portion of the mounting case, and the work is complicated regardless of assembly by machines or manual assembly.

  In order to simplify the assembling work, it may be possible to increase the clearance between the outer peripheral shape of the liquid crystal panel and the housing part of the mounting case. In this case, the position of the mounting case and the liquid crystal panel after assembly is considered. It is difficult to make the relationship constant, and the quality of the display module deteriorates.

  SUMMARY An advantage of some aspects of the invention is that it provides an electro-optical device mounting case and a display module that can easily accommodate the electro-optical device.

  The mounting case for an electro-optical device according to the present invention is a mounting case for an electro-optical device having a recess for accommodating the electro-optical device, and is at least one of the side surfaces of the recess facing the side surface of the electro-optical device. The part has an inclined surface in which the opening size increases as it proceeds in the opening direction.

  According to such a configuration of the present invention, since the concave portion has a forward tapered shape that expands in the opening direction, the electro-optical device can be easily accommodated in the concave portion. For example, the worker who performs the assembly can finish the work reliably and quickly without being aware of the positioning necessary for fitting when the electro-optical device is accommodated in the mounting case.

  Further, the present invention is configured by a bottom surface portion of the recess with which the surface portion of the electro-optical device abuts, and a corner portion where the bottom surface portion and the inclined surface intersect, and the electro-optic on the bottom surface portion. And a positioning portion that defines a position in the planar direction of the apparatus.

  According to such a configuration, the electro-optical device is positioned with respect to the mounting case by being inserted into the housing portion. Therefore, it is possible to stabilize the quality of the display module while reducing the number of steps for positioning.

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

  According to such a configuration of the present invention, since the electro-optical device is reliably accommodated in the mounting case, it is possible to provide high display quality.

  Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, the display module is used in a projection display device, and a transmissive liquid crystal display panel is applied as an electro-optical device. 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 an exploded perspective view showing the configuration of the display module. 2 is a cross-sectional view taken along the line II-II in FIG.

  As shown in FIG. 1, the display module 1 includes an electro-optical device 500, a mounting case 200, and a cover member 300. The display module 1 is configured by sandwiching an electro-optical device 500 between a mounting case 200 and a cover member 300, and is disposed inside a projection display device or the like.

  The electro-optical device 500 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. It is used as a light valve of a projection display device such as a projector. The electro-optical device 500 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 device 500, and a flexible printed circuit board (on the external circuit connection terminal) In the following, an FPC (Flexible Printed Circuit) 501 is mounted. The FPC 501 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 device 500. For example, when the electro-optical device 500 is used in a projection display device, the electro-optical device 500 is connected to a control device (not shown) via the FPC 501, and based on image signals and various drive signals transmitted from the control device, Display an image.

  The mounting case 200 is a substantially rectangular frame-shaped member for housing the electro-optical device 500, and the two-surface width of the mounting surface portion 206 that defines the thickness and the exterior surface portion 207 is the thickness of the electro-optical device 500. It is formed larger than this. The mounting case 200 is made of aluminum, copper, magnesium, or an alloy thereof, which 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 resin such as engineer plastic may be used. At the four corners of the frame-shaped mounting case 200, through holes 208 for attaching the mounting case 200 to a projection display device or the like with screws are formed.

  In addition, the mounting case 200 is formed with a housing portion 201 that is a recess for housing the electro-optical device 500. 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. 2, 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 device 500 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 In addition, a window portion 202 provided as a through hole in a region corresponding to the image display region 10 a of the electro-optical device 500 when the electro-optical device 500 is accommodated is formed on the bottom surface portion 221 of the second-stage recess 222. Has been.

  A tapered portion having a tapered surface portion (inclined surface) formed in a forward tapered shape in which the opening size increases as it proceeds in the opening direction, on the side surfaces facing each other of the first-stage recess 212 that accommodates the TFT array substrate 10. 213 is formed. As shown in FIG. 2, the interval W1 between the corners 214 where the taper surfaces of the pair of taper portions 213 formed at positions facing each other and the bottom surface portions 211 of the first-stage recesses 212 intersect with each other is as follows. It is formed so as to substantially match the outer dimension L1 of the substrate 10. Further, the distance W2 on the most opening side of the tapered surfaces of the pair of tapered portions 213 formed at positions facing each other is formed larger than the outer dimension L1 of the TFT array substrate 10 by a predetermined value.

  On the other hand, the side surface portion of the second-stage concave portion 222 that accommodates the counter substrate 20 is separated from the counter substrate 20 by a predetermined interval in a state where the electro-optical device 500 is accommodated in the accommodating portion 201. Is formed. The same applies to the bottom surface portion 221 of the second-stage recess 222. This is to prevent double fitting in which positioning is performed in both the first step recess 212 and the second step recess 222.

  In addition, the FPC opening 220 is formed in the mounting case 200 so that the FPC 501 extends to the outside of the mounting case 200 without bending. The FPC opening 220 is a notch provided on one side of the frame-shaped mounting case 200 and is formed larger than the width of the FPC 501.

  Further, a claw portion 230 is formed at the approximate center of two sides of the mounting case 200 that are in contact with the side where the FPC opening 220 is formed.

  The cover member 300 is a member having a substantially U-shaped cross-section by bending a flat plate, and includes a main body on a frame having a rectangular window 301 and hook portions 302 formed on both sides of the main body. I have.

  The cover member 300 is positioned and fixed to the mounting surface 206 side of the mounting case 200 when the hook portion 302 is locked to the claw portion 230 of the mounting case 200. The window 301 of the cover member 300 is formed so that the image display region 10 a of the electro-optical device 500 is exposed when the electro-optical device 500 is sandwiched between the cover member 300 and the mounting case 200. The cover member 300 is made of metal or resin.

  The mounting case 200, the cover member 300, and the electro-optical device 500 having the above-described shapes are fixed to each other by being filled with an adhesive therebetween, and constitute the display module 1.

  When the display module 1 having the above configuration is assembled, when the electro-optical device 500 is accommodated in the accommodating portion 201 of the mounting case 200, the electro-optical device 500 is inserted from the opening direction of the accommodating portion 201. At this time, since the first-stage recess 212 of the housing part 201 has a forward taper shape that expands in the opening direction, even if the positions of the housing part 201 and the electro-optical device 500 are slightly shifted, the electro-optical device 500 is. Can be inserted into the housing part 201 of the mounting case 200.

  Further, in a state where the electro-optical device 500 is completely inserted into the housing portion 201, that is, in a state where the surface of the TFT array substrate 10 is in contact with the bottom surface portion 211 of the first-stage recess 212, the taper portion Since the interval W1 between the corner portion 214 between the 213 and the bottom surface portion 211 substantially coincides with the outer dimension L1 of the TFT array substrate 10, the position of the TFT array substrate 10 in the plane direction is uniquely determined. That is, the corner portion 214 constitutes a positioning portion, and the electro-optical device 500 is positioned with respect to the mounting case 200 by being inserted into the housing portion 201.

  From the above, for example, an operator who performs assembling finishes the work reliably and quickly without being aware of the positioning necessary for fitting when the electro-optical device 500 is accommodated in the accommodating portion 201. Is possible.

  Further, for example, when the display module 1 is assembled by an automatic assembling machine constituted by a robot or the like, the interval W2 that is the maximum opening width of the recess 212 in the first stage of the housing portion 201 and the outer shape of the TFT array substrate 10 If the difference from the dimension L1 is larger than the variation in positioning by the automatic conveyance machine, the electro-optical device 500 is inserted into the housing portion 201 of the mounting case 200 without providing a highly accurate positioning means such as image processing. Therefore, it is possible to realize an inexpensive and quick assembly process.

  In the display module 1 of the present embodiment, the electro-optical device 500 is simultaneously positioned with respect to the mounting case 200 by inserting the electro-optical device 500 into the housing portion 201. Therefore, the quality of the display module 1 is stabilized while reducing the positioning process. For this reason, it becomes possible to reduce the inspection process of a display module, for example.

  In addition, according to the present embodiment, in a state where the electro-optical device 500 is inserted into the housing portion 201, the side surface portion of the electro-optical device 500 and the side surface portion of the housing portion 201 are located on the most opening side of the housing portion 201. A gap is formed between the two. By utilizing this gap, it becomes easy to pour a resin for bonding the electro-optical device 500 and the mounting case 200, so that the electro-optical device 500 can be securely and stably fixed.

  Therefore, according to the present embodiment, it is possible to provide a mounting case for an electro-optical device and a display module that can easily house the electro-optical device and can accurately position the electro-optical device. It is.

  In the present embodiment described above, the forward taper tapered portion 213 is provided in the portion facing the side surface of the TFT array substrate 10 in the side surface portion of the accommodating portion 201. As shown in FIG. 3, a taper portion 223 may be provided on the side surface of the second-stage recess 222 of the housing portion 201, and positioning may be performed using the outer shape of the counter substrate 20. Needless to say, if the electro-optical device has a form on a single flat plate, the accommodating portion does not have to be stepped.

  Further, in the present embodiment, a forward tapered taper portion is provided on a pair of opposite sides of the concave portion that is the housing portion. However, for example, as shown in FIG. 4, only one of the opposing side surface portions is provided. The form which forms the taper part 213a may be sufficient.

  Further, the tapered portion does not need to be formed at a symmetrical position in the side portions facing each other when viewed from the opening direction. For example, one tapered portion is formed on one side portion, and the other side portion is formed on the other side portion. Two taper portions may be formed.

  The electro-optical device is not limited to a transmissive liquid crystal panel, and may be a reflective or transflective liquid crystal panel, and may further include a backlight device, a front light device, and the like. . 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.

  The present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification. A device mounting case and a display module are also included in the technical scope of the present invention.

It is a disassembled perspective view of a display module. It is II-II sectional drawing of FIG. It is sectional drawing which shows the modification of a mounting case. It is sectional drawing which shows the modification of a mounting case.

Explanation of symbols

  10 TFT array substrate, 20 counter substrate, 200 mounting case, 202 window portion, 211 bottom surface portion, 212 first step recess, 213 taper portion (inclined surface), 214 corner portion, 221 bottom surface portion, 222 second step Recess of 500, electro-optical device

Claims (3)

A mounting case for an electro-optical device having a recess for accommodating the electro-optical device,
A mounting case for an electro-optical device, characterized in that at least a part of the side surface portion of the recess facing the side surface portion of the electro-optical device has an inclined surface whose opening size increases as it proceeds in the opening direction. A bottom surface portion of the recess with which a surface portion of the electro-optical device abuts,
The positioning part which comprises the corner | angular part which this bottom face part and the said inclined surface cross | intersect, and prescribes | regulates the position of the planar direction of the said electro-optical apparatus on the said bottom face part. 2. A mounting case for an electro-optical device according to 1.   3. A display module comprising the electro-optical device mounted in the electro-optical device mounting case according to claim 1 or 2.

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