JP2009217216A - Electro-optical apparatus in mount-case and electronic device equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently radiate heat generated in a liquid crystal device from a contact portion where the liquid crystal device comes in contact with the mount case body, toward the mount case body side. <P>SOLUTION: The electro-optical apparatus includes: the liquid crystal device 130 where the projection light emitted from a light source lamp 102 is made incident on an image display area 110a; the mount case body 40 where the liquid crystal device 130 is stored; and a filling material 70 which is filled in a space between the peripheral part of the liquid crystal device 130 and the inner wall of the mount case body 40. A rugged part 137 is formed on the peripheral part facing the inner wall of the mount case body 40 of the liquid crystal device 130. The filling material 70 having high heat-conductivity is filled in the space between the rugged part 137 and the inner wall of the mount case body 40. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electro-optical device with a mounting case in which heat dissipation efficiency of an electro-optical device housed in a mounting case main body is increased, and an electronic apparatus including the same.

  As is well known, for example, when a liquid crystal device, which is representative of an electro-optical device, is used as a liquid crystal light valve incorporated in an electronic apparatus such as a projection display device, the liquid crystal light valve is not provided with a mounting portion. For example, as disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2000-181372), a liquid crystal light valve is mounted on a mounting case, and is fixed to a light beam incident end face through the mounting case.

  By the way, recent projection type display devices have a strong demand for higher brightness and higher resolution of projected images, and in order to meet these demands, there is a tendency to employ a high output lamp as a light source lamp. 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. Therefore, when the output of the light source lamp is increased, the temperature of the liquid crystal device is easily increased by the heat rays emitted from the lamp, which adversely affects display characteristics and durability.

As a countermeasure, in Patent Document 1 described above, a slit is formed on the side surface of the mounting case for mounting the liquid crystal device, and the surface area of the mounting case is increased by the slit, thereby improving the heat dissipation of the liquid crystal device. Technology is disclosed.
JP 2000-181372 A

  However, in the technique disclosed in the above-described document, the surface area of the mounting case is merely increased. Unless the heat generated in the electro-optical device (liquid crystal device) is efficiently radiated to the mounting case, the heat dissipation of the liquid crystal device is performed. Sex cannot be enhanced.

  In view of the above circumstances, the present invention can efficiently dissipate heat from the electro-optical device to the mounting case main body side from the contact portion between the electro-optical device and the mounting case main body, and has excellent light resistance and heat resistance. It is an object of the present invention to provide an electro-optical device with a mounting case and an electronic apparatus including the same.

  In order to achieve the above object, the first invention provides an electro-optical device in which projection light is incident from a light source on an image display region, a mounting case main body that houses the electro-optical device, and a peripheral portion of the electro-optical device. In an electro-optical device with a mounting case provided with a filler filled between the inner wall of the mounting case main body, a concavo-convex portion is formed in a peripheral portion facing the inner wall of the mounting case main body of the electro-optical device. It is characterized by that.

  In such a configuration, since the uneven portion is formed in the peripheral portion of the electro-optical device that faces the inner wall of the mounting case main body, the contact area between the peripheral portion of the electro-optical device and the inner wall of the mounting case main body increases. The heat of the electro-optical device can be efficiently radiated from the contact portion to the mounting case main body side, and excellent light resistance and heat resistance can be obtained.

  A second invention is characterized in that, in the first invention, a filler is filled between the uneven portion and the inner wall of the mounting case main body.

  In such a configuration, since the charging material is filled between the uneven portion formed around the electro-optical device and the mounting case main body, the contact area between the peripheral portion of the electro-optical device and the filler is increased. The heat of the electro-optical device can be efficiently radiated from the contact portion to the mounting case main body side.

  A third invention is the first invention or the second invention, wherein the electro-optical device is formed by bonding a first substrate and a second substrate, and the concavo-convex portion is formed between the first substrate and the first substrate. It is formed in at least one peripheral portion with the second substrate.

  In such a configuration, since the concavo-convex portion is formed on at least one peripheral portion of the first substrate and the second substrate, when the concavo-convex portion is formed on one of the first substrate and the second substrate, Manufacture is simplified, and when the concavo-convex portion is formed on both the first substrate and the second substrate, a higher heat dissipation effect can be obtained.

  According to a fourth aspect of the present invention, in the first to third aspects of the present invention, another concave and convex portion having a shape that fits the concave and convex portion is formed on the inner wall facing the concave and convex portion of the mounting case body. .

  In such a configuration, since the other concavo-convex portion that fits the concavo-convex portion formed in the peripheral portion of the electro-optical device is formed on the inner wall of the mounting case main body, the mounting case main body has a contact area with the filler. It becomes large and can receive heat from the filler efficiently.

  A fifth invention is characterized in that, in the first to fourth inventions, the uneven portion is formed in a sawtooth shape. In such a configuration, since the uneven portion is formed in a sawtooth shape, the surface area can be further increased.

  A sixth invention is characterized in that, in the first to fourth inventions, the concavo-convex portion is formed in a continuous waveform having a gentle curve. In such a configuration, since the concavo-convex portion has a continuous waveform with a gentle curve, stress is not concentrated on the ridge portion, and damage can be prevented.

  An electronic apparatus according to an aspect of the invention includes the mounting case-encased electro-optical device according to the first to sixth aspects. Since the electronic apparatus having such a configuration includes any one of the above-described electro-optical devices with a mounting case according to the first to fifth inventions, the projection light from the light source is incident on the electro-optical device and is heated. Even if this occurs, the generated heat can be efficiently dissipated to the mounting case body side, excellent light resistance and heat resistance can be obtained, and high display quality can be obtained.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[First Embodiment]
1 to 4 show a first embodiment of the present invention, FIG. 1 is an exploded perspective view of a mounting case and a liquid crystal light valve, FIG. 2 shows a state in which the liquid crystal light valve is mounted on the mounting case body, ) Is a rear view thereof, (b) is a cross-sectional view taken along line bb of (a), FIG. 3 is a perspective view of a mounting case attached to a dichroic prism, and FIG. 4 is a schematic view of a color liquid crystal projector apparatus.

  First, the configuration of a color liquid crystal projector unit, which is an example of a projection display device, will be briefly described with reference to FIG. This color liquid crystal projector unit includes a liquid crystal projector 100 which is an example of an electronic device, and a screen 120. The liquid crystal projector 100 includes liquid crystal light valves 110R, 110G, and 110B as three electro-optical devices that modulate the color light beams R, G, and B.

  In this liquid crystal projector 100, light projected from a light source lamp 102 having a white light source such as a metal halide lamp is converted into light components R, G, and B corresponding to three primary colors by three mirrors 106 and two dichroic mirrors 108. The light is split and guided to the liquid crystal light valves 110R, 110G, and 110B for each color and modulated according to image information. At that time, in particular, the B light is guided through a relay lens system 121 including an incident lens 122, a relay lens 123, and an exit lens 124 in order to prevent light loss due to a long optical path.

  Then, the light components corresponding to the three primary colors modulated when passing through the image display areas 110a (see FIG. 1) of the liquid crystal light valves 110R, 110G, and 110B are again synthesized by the dichroic prism 111 as a color synthesizing optical device. After that, a color image is projected through the projection lens 114 onto the screen 120 provided on the projection lens 114. In addition, since each liquid crystal light valve 110R, 110G, 110B has the same structure, in the following, these are collectively called the liquid crystal light valve 110, and are demonstrated collectively.

  As shown in FIG. 1, the liquid crystal light valve 110 is affixed in a state where the liquid crystal device 130 is an electro-optical device having a substantially rectangular shape and is in close contact with the light incident side and the light exit side of the liquid crystal device 130. And dustproof glasses 131 and 132 which are dustproof substrates. Further, in the liquid crystal device 130, a TFT substrate 133 as a first substrate and a counter substrate 134 as a second substrate are arranged to face each other via a sealing material (not shown). Liquid crystal (electro-optical material) is sealed in a space sealed by a sealing material therebetween. Reference numeral 136 denotes a flexible connector connected to an external circuit connection terminal (not shown). Reference numeral 110 a denotes an image display area set in the liquid crystal light valve 110.

  The liquid crystal light valve 110 is housed and held in the mounting case 30. As shown in FIG. 3, the mounting case 30 is fixed in a state where the mounting case 30 is in contact with the light incident surface of the dichroic prism 111 via a fixing plate 113. The fixed plate 113 holds a known exit side polarizing plate (not shown).

  The mounting case 30 includes a mounting case main body 40 that accommodates and holds the liquid crystal light valve 110, and a frame-shaped member 60 that engages with the mounting case main body 40 and presses and fixes the liquid crystal light valve 110 accommodated therein. ing. The frame-like member 60 is made of a sheet metal formed by processing a flat plate, hooks 62 are bent on both sides of the frame-like member 60, and a hook engaging portion 40a to which the hook 62 is engaged is mounted. It is formed on the side surface of the case body 40.

  The mounting case body 40 is formed of a material having high thermal conductivity (aluminum, aluminum alloy, ceramic sintered body, etc.).

  Screw insertion holes 40 b are formed in the four corners of the mounting case body 40, and a housing portion 41 for housing the liquid crystal light valve 110 is formed inside the mounting case body 40. The housing portion 41 includes a TFT substrate housing recess 41a formed on the light beam exit side and a counter substrate housing recess 41b formed on the light beam entrance side. Further, the light beam incident on the counter substrate housing recess 41b. On the side, an incident window 41c for receiving projection light from the light source lamp 102 is opened. A notch 44 is formed on one side of the TFT substrate housing recess 41a.

  The TFT substrate accommodating recess 41a accommodates the TFT substrate 133 of the liquid crystal light valve 110 and the dust-proof glass 131 attached to the light emission side of the TFT substrate 133. The counter substrate accommodating recess 41b includes the counter substrate 134 and The dust-proof glass 132 attached to the light incident side of the counter substrate 134 is accommodated. Further, the flexible connector 136 that is electrically connected to the TFT substrate 133 is extended to the outside through the notch 44.

  As shown in FIGS. 1 and 2, sawtooth-shaped uneven portions 137 are formed on the periphery of the TFT substrate 133 and the dust-proof glass 131. The uneven portion 137 is formed by forming a break pattern by etching along the uneven shape of the uneven portion 137 and then dividing the break pattern along the break pattern. Alternatively, it is formed by irradiating a pulsed laser beam emitted from a laser irradiation device along the concavo-convex shape of the concavo-convex portion 137 to form a modified region inside the plate thickness and dividing by this modified layer.

  In a state where the liquid crystal light valve 110 is mounted in the housing portion 41 of the mounting case body 40, the counter substrate 134 and the dustproof glass 132 attached thereto are housed in the counter substrate housing recess 41b, and the TFT substrate 133 and this The dust-proof glass 131 attached to the TFT substrate is housed in the TFT substrate housing recess 41a. Then, a filler 70 is filled between the peripheral portion of the TFT substrate 133 and the dust-proof glass 131 and the inner wall of the TFT substrate housing recess 41a facing it. The filler 70 is an adhesive having high thermal conductivity (hereinafter referred to as “thermal conductive adhesive”). In this embodiment, the filler 70 is a thermosetting type using a mold resin such as epoxy or silicone, or UV curable adhesive is used.

  Since the peripheral portion of the TFT substrate 133 and the dust-proof glass 131 and the inner wall of the TFT substrate housing recess 41a facing the TFT substrate 133 and the dust-proof glass 131 are filled with the filler 70 made of a high thermal conductive adhesive, Heat from the periphery of the dust-proof glass 131 can be radiated to the mounting case body 40 via the filler 70. Further, since the uneven portion 137 is formed in the peripheral portion of the TFT substrate 133 and the dust-proof glass 131, the surface area is increased, and the contact area with the filler 70 is increased correspondingly, so that the TFT substrate 133 and the dust-proof glass are increased. The heat from the periphery of 131 can be efficiently radiated to the mounting case main body 40 through the filler 70.

  Further, a frame-shaped member 60 is brought into contact with the outer surface of the dust-proof glass 131 attached to the TFT substrate 133 side of the mounting case main body 40, and hooks 62 formed on both sides of the frame-shaped member 60 are bent. The outer edge portion of the surface of the dust-proof glass 131 is held and fixed by being engaged with a hook engaging portion 40 a formed on the side surface of the mounting case main body 40. The mounting case 30 is in contact with the fixed plate 113 on the frame-like member 60 side. Therefore, the outer surface of the mounting case main body 40 is opposed to the light beam incident side.

  Next, the operation of the present embodiment having such a configuration will be described. As shown in FIG. 4, in the liquid crystal projector 100, when projection light is emitted from the light source lamp 102, the projection light is light corresponding to the three primary colors of RGB by the three mirrors 106 and the two dichroic mirrors 108. The light is split into components R, G, and B and guided to the corresponding liquid crystal light valve 110 (110R, 100G, and 110B) for each color. The light components corresponding to the three primary colors modulated by the liquid crystal light valve 110 (110R, 100G, 110B) are synthesized again by the dichroic prism 111, and then projected as a color image on the screen 120 via the projection lens 114. Is done.

  A heat ray is emitted from the light source lamp 102 together with light. Accordingly, when the projection light from the light source lamp 102 passes through each liquid crystal light valve 110 (110R, 100G, 110B), the liquid crystal light valve 110 is heated. Since the uneven portion 137 is formed on the periphery of 133 and the dust-proof glass 131, the surface area of the periphery is large, and therefore the contact area with the filler 70 made of a high thermal conductive adhesive is large, so that the liquid crystal Heat from the light valve 110 can be efficiently radiated to the mounting case body 40 via the filler 70. As a result, excellent light resistance and heat resistance can be obtained, and the progress of deterioration of the liquid crystal light valve 110 can be suppressed.

  In particular, when an organic material or polyimide is used for each component including the liquid crystal of the liquid crystal light valve 110, the B light has higher energy than other R light and G light, so the liquid crystal that transmits the B light. Although the light valve 110B is easily deteriorated, the liquid crystal light valve 110 has high heat dissipation properties, so that high light resistance and heat resistance can be obtained even for B light.

  In addition, the uneven | corrugated | grooved part 137 mentioned above is not restricted to a sawtooth shape, The waveform which a gentle curve may continue may be sufficient. Further, the concavo-convex portion 137 may be formed in the peripheral portion of the counter substrate 134 and the dustproof glass 132 attached to the counter substrate 134. In this case, the filler 70 is also filled between the counter substrate 134 and the periphery of the dust-proof glass 132 and the counter substrate housing recess 41b. By forming the concavo-convex portion 137 also in the peripheral portion of the counter substrate 134 and the dust-proof glass 132, a higher heat dissipation effect can be obtained. Alternatively, the uneven portion 137 may not be formed on the TFT substrate 133 and the dust-proof glass 131 side, and the uneven portion 137 may be formed only on the peripheral portion of the counter substrate 134 and the dust-proof glass 132. Manufacturing is simplified by forming the uneven portion 137 on one of the peripheral portion of the TFT substrate 133 and the dust-proof glass 131 and the peripheral portion of the counter substrate 134 and the dust-proof glass 132.

[Second Embodiment]
5 to 7 show a second embodiment of the present invention, FIG. 5 is an exploded perspective view of a mounting case and a liquid crystal light valve, FIG. 6 shows a mounting case body, (a) is a rear view thereof, (b) ) Is a cross-sectional view taken along the line bb of FIG. 7A, and FIG.

  In the first embodiment described above, the concavo-convex portion 137 is formed only on the liquid crystal light valve 110 side. However, in this embodiment, as shown in FIGS. 5 and 6, the TFT substrate 133 and the dust-proof glass of the liquid crystal light valve 110 are used. An uneven portion (other uneven portions) 138 is also formed on the inner wall of the TFT substrate housing recess 41a of the mounting case main body 40 in which 131 is housed.

  As shown in FIG. 7, the concavo-convex portion 138 is formed in a sawtooth shape that fits into the concavo-convex portion 137 formed in the peripheral portion of the TFT substrate 133 and the dust-proof glass 131, and both the concavo-convex portions 137, 138. Fillers 70 are filled in the gaps formed therebetween.

  According to the present embodiment, the uneven portion 138 that fits the uneven portion 137 formed on the peripheral portion of the TFT substrate 133 and the dust-proof glass 131 is formed on the inner wall of the mounting case body 40. Increases surface area. As a result, the contact area with the filler 70 is increased, and the heat from the filler 70 can be received efficiently.

  Furthermore, since the both concavo-convex parts 137 and 138 are formed to fit each other, the gap between the concavo-convex parts 137 and 138 can be narrowed. As a result, it is possible to use a light-curing heat conductive adhesive having a low viscosity as the filler 70, not only improving the production efficiency, but also the contact area of the filler 70 with respect to both the uneven portions 137 and 138. Therefore, the liquid crystal light valve 110 can be firmly bonded and fixed to the mounting case main body 40.

  In addition, the uneven | corrugated | grooved parts 137 and 138 mentioned above are not limited to a sawtooth shape, and may have a continuous waveform of loose curves that fit each other. Further, the uneven portion 137 is formed in the peripheral portion of the counter substrate 134 and the dust-proof glass 132 attached to the counter substrate 134, and the uneven portion 138 fitted to the uneven portion 137 is formed in the counter substrate receiving recess 41b. The filler 70 may be filled between the two.

  The present invention is not limited to the above-described embodiment, 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, and mounting cases involving such changes are also possible. Moreover, it is included in the technical scope of the present invention. The electro-optical device may be not only the liquid crystal device 130 but also an electrophoresis device, an EL (electroluminescence) device, or the like.

  Furthermore, the electronic apparatus is not limited to the above-described liquid crystal projector 100 as long as it can be realized by including the electro-optical device according to the present invention, but is a television receiver, a viewfinder type or a monitor direct-view type video tape recorder, a car navigation system. The present invention can be applied to various electronic devices such as a device, a pager, an electronic notebook, a calculator, a word processor, a workstation, a video phone, a POS terminal, and a device having a touch panel.

The disassembled perspective view of the mounting case and liquid crystal light valve by 1st Embodiment (A) is a rear view of the mounting case body with a liquid crystal light valve mounted, and (b) is a cross-sectional view taken along line bb of (a). Same perspective view with mounting case attached to dichroic prism Schematic diagram of color liquid crystal projector device The disassembled perspective view of the mounting case and liquid crystal light valve by 2nd Embodiment (A) is a rear view of the mounting case body, (b) is a cross-sectional view taken along the line bb of (a). Same as above, enlarged view of the main part with the liquid crystal light valve attached to the mounting case body

Explanation of symbols

DESCRIPTION OF SYMBOLS 30 ... Mounting case, 40 ... Mounting case main body, 41 ... Accommodating part, 41a ... Substrate accommodation recessed part, 41b ... Opposite substrate accommodating recessed part, 70 ... Filler, 100 ... Liquid crystal projector, 102 ... Light source lamp, 110, 110R, 110G , 110B, each liquid crystal light valve, 110a, an image display area, 130, a liquid crystal device, 131, 132, dust-proof glass, 133, a TFT substrate, 134, a counter substrate, 137, 138, an uneven portion.

Claims (7)

An electro-optical device in which projection light is incident on the image display area from a light source, a mounting case main body that accommodates the electro-optical device, and a space between the periphery of the electro-optical device and the inner wall of the mounting case main body In an electro-optical device with a mounting case provided with a filler
An electro-optical device with a mounting case, wherein a concavo-convex portion is formed in a peripheral portion facing the inner wall of the mounting case main body of the electro-optical device.   2. The mounting case-encased electro-optical device according to claim 1, wherein a filler is filled between the uneven portion and the inner wall of the mounting case. The electro-optical device is formed by bonding a first substrate and a second substrate, and the concavo-convex portion is formed on at least one peripheral portion of the first substrate and the second substrate. The electro-optical device with a mounting case according to claim 1 or 2. The other uneven | corrugated | grooved part of the shape fitted to this uneven | corrugated | grooved part is formed in the inner wall facing the said uneven | corrugated | grooved part of the said mounting case main body, The any one of Claims 1-3 characterized by the above-mentioned. Electro-optical device with mounting case. The electro-optical device with a mounting case according to claim 1, wherein the uneven portion is formed in a sawtooth shape. The electro-optical device with a mounting case according to claim 1, wherein the uneven portion is formed in a continuous waveform having a gentle curve. An electronic apparatus comprising the mounting case-encased electro-optical device according to any one of claims 1 to 6.

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