JP2010060968A - Electro-optical device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently dissipate heat by a relatively simple configuration in an electro-optical device, such as a liquid crystal device. <P>SOLUTION: The electro-optical device for displaying an image by light projection includes: a pair of substrates (10 and 20), having an electro-optical material (50) therebetween; and a dust-proof substrate (200) which is provided in contact with a surface on the side which does not face the electro-optical material, of a substrate on the light incidence side out of the pair of substrates and has a first portion (201) which transmits light and a second portion (202), which is located above the first portion and does not transmit light. A liquid (300), which can be convected between the first portion and the second portion, is sealed inside the dust-proof substrate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technical field of an electro-optical device such as a liquid crystal device, and an electronic apparatus such as a liquid crystal projector including the electro-optical device.

  As this type of electro-optical device, for example, there is a device that displays an image by projecting light from a light source. In many cases, the electro-optical device is provided with a cooling mechanism (heat dissipating mechanism) because the electro-optical device absorbs energy of the light and generates heat when the light is projected. In such a cooling mechanism, a water cooling method using a liquid excellent in heat dissipation has been proposed in addition to an air cooling method in which cooling is performed by an air flow.

  For example, Patent Literature 1 and Patent Literature 2 disclose a technique for enhancing the heat dissipation effect by covering the entire display panel with a liquid. Patent Document 3 discloses a technique in which a liquid container is disposed close to a display panel.

JP-A-2005-70439 JP 2002-131737 A Japanese Patent Laid-Open No. 10-148828

  However, in the techniques disclosed in Patent Documents 1 and 2, since it is required to provide a container for housing the entire display panel together with the liquid, the entire apparatus becomes very large. In addition, the technology disclosed in Patent Document 3 has a configuration that includes a container for storing a liquid and a heat transport means for efficiently releasing heat, separately from the display panel. Will be complicated. That is, the above-described technique has technical problems such as various inconveniences such as an increase in size and complexity of the apparatus and an increase in manufacturing cost associated therewith.

  SUMMARY An advantage of some aspects of the invention is that it provides an electro-optical device and an electronic apparatus capable of efficiently dissipating heat with a relatively simple configuration.

  In order to solve the above problems, an electro-optical device of the present invention is an electro-optical device that displays an image by projecting light, and includes a pair of substrates that sandwich an electro-optical material, and the above-described pair of substrates. It is provided so as to be in contact with the surface of the substrate on the light incident side that does not face the electro-optical material, and is positioned above the first portion through which the light passes and the light passes therethrough. A dust-proof substrate having a second portion that is not to be sealed, and inside the dust-proof substrate is sealed a liquid that can be convected between the first portion and the second portion.

  According to the electro-optical device of the present invention, during the operation, the pixel region of the display panel configured by a pair of substrates sandwiching an electro-optical material such as liquid crystal (that is, an image is applied by applying a voltage to the electro-optical material). Is projected from a light source such as a white lamp. As a result, an image projected directly on the screen or the like can be viewed.

  At this time, the substrate on which the light is projected generates heat by absorbing the energy of the light. If the substrate is excessively heated, problems such as display defects and failures may occur. On the other hand, in the electro-optical device of the present invention, it is possible to suitably dissipate such heat by providing the dustproof substrate with a heat dissipation effect in order to prevent dust and dirt from adhering to the substrate. Yes.

  The dustproof substrate is provided on a surface of the pair of substrates on the light incident side that does not face the electro-optic material (that is, a surface on which light first enters). The dust-proof substrate has a first portion through which light passes and a second portion that is positioned above the first portion and through which light does not pass. Here, “upward” is not limited to vertically upward, and includes, for example, obliquely upward.

  In the present invention, in particular, a liquid is sealed inside the dustproof substrate, and convection is possible between the first part and the second part. Specifically, a space extending from the first portion to the second portion exists inside the dustproof substrate, and a liquid is sealed in the space. It is desirable for the liquid to be sealed to have high transparency and corrosion resistance. Further, it is desirable that the refractive index is close to that of the member constituting the dustproof substrate.

  The liquid sealed inside the dustproof substrate functions as a heat transfer medium for dissipating heat generated in the substrate. Specifically, the heat generated in the substrate is first transferred to the liquid in the first portion of the dustproof substrate. Since the liquid warmed by heat becomes small in density, it rises due to the convection effect and reaches the second portion of the dustproof substrate. Here, since the second portion is a portion through which light does not pass, heat is not transferred from the substrate unlike the first portion. Therefore, the liquid that has reached the second portion gradually dissipates heat to the outside. The liquid that has dissipated the heat falls to the first portion because the density returns to the original state. By repeating such a phenomenon, the heat on the substrate is efficiently dissipated.

  According to the configuration as described above, compared to a case where the dustproof substrate is a simple substrate (that is, a substrate that does not have liquid inside), a high heat dissipation effect can be provided by slightly changing the configuration. For this reason, for example, it is not necessary to provide a cooling mechanism for cooling the substrate separately, and various inconveniences such as an increase in size and complexity of the apparatus and an increase in manufacturing cost associated therewith can be avoided. However, when there is a sufficient space for the arrangement, in addition to the dustproof substrate according to the present invention, another cooling mechanism may be provided.

  Further, since the dustproof substrate of the present invention can be formed by a relatively inexpensive member such as quartz that is easy to perform the molding process, for example, compared to the case of using a transparent substrate having a relatively high thermal conductivity such as quartz. Therefore, it can be configured at a low cost. Furthermore, it is not necessary to consider optical compensation due to birefringence, which is extremely advantageous in practice.

  Note that typically, the larger the size of the second portion of the dustproof substrate and the greater the amount of liquid sealed in the dustproof substrate, the higher the heat dissipation effect. These various conditions can be appropriately set in consideration of the balance with the arrangement space of the apparatus and the light energy loss.

  As described above, according to the electro-optical device of the present invention, it is possible to efficiently dissipate heat with a relatively simple configuration, and thus the reliability of the device can be preferably improved.

  In one aspect of the electro-optical device of the present invention, the refractive index of the liquid is the same as the refractive index of a member constituting the dustproof substrate.

  According to this aspect, since the refractive index of the liquid sealed in the dustproof substrate is the same as the refractive index of the members constituting the dustproof substrate, the light incident on the dustproof substrate is separated from the dustproof substrate. No refraction at the interface with the liquid. Therefore, it is possible to effectively reduce energy loss due to light refracting.

  Note that “same” in this embodiment does not require exactly the same, and the refractive index of the liquid sealed in the dustproof substrate and the refractive index of the members constituting the dustproof substrate are It means very close value. In other words, if the values of the refractive index of the liquid sealed in the dust-proof substrate and the refractive index of the members constituting the dust-proof substrate are brought close to each other, the effect of this embodiment can be obtained accordingly. For example, when the dust-proof substrate is made of quartz (refractive index: about 1.46), if glycerin (refractive index: about 1.47) is used as the liquid, the energy loss of light is extremely effectively reduced. be able to.

  In another aspect of the electro-optical device according to the aspect of the invention, the electro-optical device may further include a heat dissipating unit that is provided above the dust-proof substrate and is configured by a member having higher thermal conductivity than the dust-proof substrate. Convection between the second part and the heat radiating part is possible.

  According to this aspect, the heat dissipating part composed of a member having higher thermal conductivity than the dustproof substrate is provided above the dustproof substrate. More specifically, the heat dissipation part is connected to the second part of the dustproof substrate, and the liquid sealed in the dustproof substrate can be convected between the second part and the heat dissipation part.

  In this aspect, the liquid heated in the first part of the dustproof substrate rises to the second part and then rises to the heat radiating part. Here, since the heat radiating portion is composed of a member having higher thermal conductivity than the dustproof substrate, the liquid in the heat radiating portion can dissipate heat more effectively than the liquid in the second portion. Therefore, it is possible to more suitably dissipate heat generated in the substrate.

  In the aspect further including the heat radiating portion described above, the heat radiating portion has a mesh-like mesh portion capable of convection with the liquid, and the mesh portion is formed so that the mesh is finer as it is higher. It may be.

  If comprised in this way, since the thermal radiation part has a mesh part with many surface areas, the heat which a liquid has can be dissipated more effectively. That is, the heat of the liquid is efficiently absorbed into the heat radiating portion and dissipated to the outside.

  Further, the mesh in the mesh portion is formed so as to be finer as it is higher. Thereby, it is possible to prevent the convection of the liquid from being hindered by the mesh in the relatively coarse portion of the mesh positioned below the mesh portion. In addition, in a relatively fine portion of the mesh located above the mesh portion, the fine mesh can dissipate heat more effectively.

  In another aspect of the electro-optical device according to the aspect of the invention, the convection promotion is provided inside the dust-proof substrate and promotes convection of the liquid by partitioning the liquid flowing upward and the liquid flowing downward. A section.

  According to this aspect, the convection promoting portion for promoting the convection of the liquid sealed in the dustproof substrate is provided inside the dustproof substrate. The convection promoting unit is, for example, a plate-like member that partitions the liquid, and promotes convection by being a partition between the liquid flowing upward and the liquid flowing downward. That is, the liquid flow can be made smooth by convection so that the liquid rotates around the partition. By promoting convection, the speed of heat transfer by the liquid is increased. Therefore, it is possible to more suitably dissipate heat generated in the substrate.

  In another aspect of the electro-optical device according to the aspect of the invention, the reflection is provided on the surface of the dust-proof substrate on which the light is incident, and prevents the light from being reflected when entering the dust-proof substrate. A prevention film is further provided.

  According to this aspect, since the antireflection film is provided on the surface on which the light is incident on the dustproof substrate (that is, the surface that is not in contact with the pair of substrates), the light is incident on the dustproof substrate. It is possible to effectively prevent light from being reflected. That is, the antireflection film functions to pass through the dustproof substrate without reflecting the light that is about to enter the dustproof substrate. Thereby, energy loss due to reflection of light can be effectively prevented.

  In order to solve the above problems, an electronic apparatus according to the present invention includes the above-described electro-optical device according to the present invention (including various aspects thereof).

  According to the electronic apparatus of the present invention, since the electro-optical device according to the present invention described above is provided, a highly reliable projection display device with a relatively simple configuration, a television, a mobile phone, an electronic notebook, Various electronic devices such as a word processor, a viewfinder type or a monitor direct-view type video tape recorder, a workstation, a videophone, a POS terminal, and a touch panel can be realized. Further, as the electronic apparatus of the present invention, for example, an electrophoretic device such as electronic paper can be realized.

  The operation and other advantages of the present invention will become apparent from the best mode for carrying out the invention described below.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, a drive circuit built-in TFT (Thin Film Transistor) active matrix drive type liquid crystal device, which is an example of the electro-optical device of the present invention, is taken as an example.

<First Embodiment>
First, the configuration of the panel portion in the electro-optical device according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a plan view showing the configuration of the panel portion of the electro-optical device according to this embodiment, and FIG. 2 is a cross-sectional view taken along the line HH ′ of FIG.

  1 and 2, in the electro-optical device according to this embodiment, the TFT array substrate 10 and the counter substrate 20 which are examples of the “pair of substrates” of the present invention are disposed to face each other. The TFT array substrate 10 is, for example, a transparent substrate such as a quartz substrate or a glass substrate, a silicon substrate, or the like. The counter substrate 20 is a transparent substrate such as a quartz substrate or a glass substrate. Between the TFT array substrate 10 and the counter substrate 20, a liquid crystal layer 50, which is an example of the “electro-optical material” of the present invention, is sealed. The liquid crystal layer 50 is made of, for example, a liquid crystal in which one or several types of nematic liquid crystals are mixed, and takes a predetermined alignment state between the pair of alignment films. The TFT array substrate 10 and the counter substrate 20 are bonded to each other by a sealing material 52 provided in a sealing region located around the image display region 10a provided with a plurality of pixel electrodes.

  The sealing material 52 is made of, for example, an ultraviolet curable resin, a thermosetting resin, or the like for bonding the two substrates, and is applied on the TFT array substrate 10 in the manufacturing process and then cured by ultraviolet irradiation, heating, or the like. It is. In the sealing material 52, a gap material such as glass fiber or glass bead is dispersed for setting the distance between the TFT array substrate 10 and the counter substrate 20 (that is, the inter-substrate gap) to a predetermined value. Note that the gap material may be arranged in the image display region 10a or a peripheral region located around the image display region 10a in addition to or instead of the material mixed in the seal material 52.

  A light-shielding frame light-shielding film 53 that defines the frame area of the image display area 10a is provided on the counter substrate 20 side in parallel with the inside of the seal area where the sealing material 52 is disposed. A part or all of the frame light shielding film 53 may be provided as a built-in light shielding film on the TFT array substrate 10 side.

  A data line driving circuit 101 and an external circuit connection terminal 102 are provided along one side of the TFT array substrate 10 in a region located outside the sealing region in which the sealing material 52 is disposed in the peripheral region. The scanning line driving circuit 104 is provided along two sides adjacent to the one side so as to be covered with the frame light shielding film 53. Further, in order to connect the two scanning line driving circuits 104 provided on both sides of the image display area 10 a in this way, a plurality of the pixel lines are covered along the remaining side of the TFT array substrate 10 and covered with the frame light shielding film 53. Wiring 105 is provided.

  On the TFT array substrate 10, vertical conduction terminals 106 for connecting the two substrates with the vertical conduction material 107 are disposed in regions facing the four corner portions of the counter substrate 20. Thus, electrical conduction can be established between the TFT array substrate 10 and the counter substrate 20.

  In FIG. 2, on the TFT array substrate 10, a laminated structure in which pixel switching TFTs as drive elements, wiring lines such as scanning lines and data lines are formed is formed. Although the detailed configuration of this laminated structure is not shown in FIG. 2, pixel electrodes 9a made of a transparent material such as ITO (Indium Tin Oxide) are provided on the laminated structure with a predetermined pattern for each pixel. It is formed in an island shape.

  The pixel electrode 9 a is formed in the image display area 10 a on the TFT array substrate 10 so as to face the counter electrode 21. On the surface of the TFT array substrate 10 facing the liquid crystal layer 50, that is, on the pixel electrode 9a, an alignment film 16 is formed so as to cover the pixel electrode 9a.

  A light shielding film 23 is formed on the surface of the counter substrate 20 facing the TFT array substrate 10. For example, the light shielding film 23 is formed in a lattice shape when viewed in plan on the facing surface of the facing substrate 20. In the counter substrate 20, a non-opening area is defined by the light shielding film 23, and an area partitioned by the light shielding film 23 is an opening area that transmits light emitted from, for example, a projector lamp or a direct viewing backlight. The light shielding film 23 may be formed in a stripe shape, and the non-opening region may be defined by the light shielding film 23 and various components such as data lines provided on the TFT array substrate 10 side.

  On the light shielding film 23, a counter electrode 21 made of a transparent material such as ITO is formed so as to face the plurality of pixel electrodes 9a. Further, in order to perform color display in the image display region 10a, a color filter (not shown in FIG. 2) may be formed on the light shielding film 23 in a region including a part of the opening region and the non-opening region. Good. An alignment film 22 is formed on the counter electrode 21 on the counter surface of the counter substrate 20.

  1 and 2, on the TFT array substrate 10, in addition to the drive circuits such as the data line drive circuit 101 and the scanning line drive circuit 104, the image signal on the image signal line is sampled to obtain data. Sampling circuit that supplies lines, precharge circuit that supplies pre-charge signals of a predetermined voltage level to multiple data lines in advance of image signals, inspection of quality, defects, etc. of the electro-optical device during production or shipment An inspection circuit or the like may be formed.

  Next, the overall configuration of the electro-optical device according to the first embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is a side view showing the overall configuration of the electro-optical device according to the first embodiment, and FIG. 4 is a side view showing the method for manufacturing the dustproof substrate according to the first embodiment. In FIG. 3 and subsequent figures, detailed members in the panel portion shown in FIGS. 1 and 2 are appropriately omitted for convenience of explanation.

  In FIG. 3, the electro-optical device according to the first embodiment includes a panel portion including the TFT array substrate 10, the counter substrate 20, and the liquid crystal layer 50 described above, and a dustproof substrate 200. Yes.

  The dustproof substrate 200 is bonded to the surface of the counter substrate 20 located on the light source light incident side using, for example, a transparent adhesive. In addition to this, it may be provided on the surface of the TFT array substrate 10 located on the side from which the light source light is emitted. The dust-proof substrate 200 includes a first portion 201 through which light source light passes and a second portion 202 that is provided so as to extend upward from the first portion 201 and through which light source light does not pass. Is filled with a cooling liquid 300.

  On the surface of the dustproof substrate 200, an antireflection film 250 for preventing reflection of light from the light source is provided. The antireflection film 250 functions to pass through the dustproof substrate 200 without reflecting the light source light that is about to enter the dustproof substrate 200. Thereby, the energy loss by reflecting light source light can be prevented effectively.

In FIG. 4, a dustproof substrate 200 is manufactured by filling a cooling liquid 300 into a main body 210 formed of a transparent substrate such as quartz, and then sealing with a lid 220. Here, in particular, the cooling liquid 300 is desirably a liquid having high transparency and corrosion resistance. Also,
The refractive index of the cooling liquid 300 is preferably close to the refractive index of the members constituting the dustproof substrate 200. If comprised in this way, the refraction | bending at the interface of the dust-proof board | substrate 200 and the cooling liquid 300 of the light which injected into the dust-proof board | substrate 200 can be reduced. Therefore, it is possible to effectively reduce energy loss due to light refracting. For example, when the dust-proof substrate 200 is made of quartz, if glycerin is used as the cooling liquid 300, the energy loss of light can be extremely effectively reduced.

  Here, for convenience of explanation, the scale is changed and illustrated, but the thicknesses w1 and w2 of the substrate constituting the dustproof substrate 200 and the thickness w3 of the portion in which the cooling liquid 300 is sealed are, for example, Each is configured to be about 1 mm. That is, the total thickness of the dustproof substrate 200 is about 3 mm. At this time, if the width w3 of the cooling liquid 300 portion is reduced, the light energy loss is reduced. On the other hand, if the width w3 of the cooling liquid 300 portion is reduced, the cooling effect described later is improved. Therefore, if the thickness of the dust-proof substrate 200 is appropriately determined in consideration of the balance of the effects described above, the dust-proof substrate 200 that can dissipate heat more appropriately can be realized.

  Returning to FIG. 3, the cooling liquid 300 sealed in the dustproof substrate 200 can be convected between the first portion 201 and the second portion 202. Specifically, the cooling liquid 300 in the first portion 201 absorbs the heat of the counter substrate 20 that has generated heat by absorbing the energy of the light source light during operation of the apparatus. As a result, the heated cooling liquid 300 rises due to the density change and reaches the second portion 202. In the second portion 202, the light source light is not projected and is not in contact with the counter substrate 20, so that the heat of the cooling liquid 300 is dissipated to the outside. The cooling liquid 300 that has dissipated the heat returns to the original density and descends to the first portion 201. By repeating such a phenomenon, the heat generated in the counter substrate 20 is efficiently dissipated outside the apparatus.

  According to the above-described configuration, it is possible to provide a heat dissipation effect by slightly changing the configuration as compared with the case where the dustproof substrate 200 is a simple substrate. For this reason, for example, it is not necessary to provide a cooling mechanism for separately cooling the counter substrate 20, and various inconveniences such as an increase in size and complexity of the apparatus and an increase in manufacturing cost associated therewith can be avoided.

  Further, the dustproof substrate 200 of the present invention can be formed by a relatively inexpensive member such as quartz that is easy to perform the molding process. For example, a transparent substrate having a relatively high thermal conductivity such as quartz is used. In comparison, it can be configured at a low cost. Furthermore, it is not necessary to consider optical compensation due to birefringence, which is extremely advantageous in practice.

  As described above, according to the electro-optical device according to the first embodiment, it is possible to efficiently dissipate heat with a relatively simple configuration, and thus it is possible to suitably improve the reliability of the device.

<Second Embodiment>
Next, an electro-optical device according to a second embodiment will be described with reference to FIG. FIG. 5 is a side view showing the overall configuration of the electro-optical device according to the second embodiment. The second embodiment is different from the first embodiment in the configuration of the dustproof substrate, and the other configurations are substantially the same. Therefore, in the second embodiment, portions different from the first embodiment will be described in detail, and descriptions of other overlapping portions will be omitted as appropriate. In FIG. 5, the same reference numerals are given to the same components as those according to the first embodiment shown in FIG. 3 and the like.

  In FIG. 5, in the electro-optical device according to the second embodiment, a radiator 400 that is an example of the “heat dissipating part” of the present invention is provided above the dustproof substrate 200 (that is, above the second portion 202). Yes. The radiator 400 is made of, for example, a metal having high thermal conductivity such as iron, and the cooling liquid 300 enclosed in the dustproof substrate 200 can be convected between the second portion 202 and the radiator 400. Yes.

  The inside of the radiator 400 has a mesh structure, and the surface area with which the cooling liquid 300 comes into contact is increased. Thereby, the radiator 400 can dissipate the heat of the cooling liquid 300 very effectively. Further, as shown in the figure, the mesh portion of the radiator 400 is finer as it goes upward. With this configuration, it is possible to effectively dissipate heat while preventing the convection of the cooling liquid 300 from being prevented by the mesh.

  As described above, according to the electro-optical device according to the second embodiment, by providing the radiator 400, the heat of the cooling liquid 300 can be more effectively dissipated outside the device. Therefore, it is possible to cool the counter substrate 20 more effectively.

<Third Embodiment>
Next, an electro-optical device according to a third embodiment will be described with reference to FIGS. FIG. 6 is a side view showing the overall configuration of the electro-optical device according to the third embodiment, and FIG. 7 is a perspective view showing the configuration of the dustproof substrate according to the third embodiment. The third embodiment differs from the first and second embodiments described above in the configuration of the dustproof substrate, and the other configurations are generally the same. Therefore, in the third embodiment, portions different from those in the first and second embodiments will be described in detail, and description of other overlapping portions will be omitted as appropriate. 6 and 7, the same reference numerals are given to the same components as the components according to the first and second embodiments shown in FIGS. 3 and 5.

  In FIG. 6, in the electro-optical device according to the third embodiment, a partition plate 500, which is an example of the “convection promoting portion” of the present invention, is provided inside the dustproof substrate 200. The partition plate 500 is made of, for example, a member similar to the substrate constituting the dustproof substrate 200. Among the cooling liquid 300, the partition plate 500 absorbs heat and tries to rise, and dissipates heat and tries to descend. Convection is promoted by partitioning the flow with what to do.

  As shown in FIG. 7, the partition plate 500 is a plate that partitions the side in contact with the panel portion (that is, the counter substrate 20) and the opposite side (that is, the side on which light is incident) inside the dustproof substrate 200. It is formed as a shaped member. By providing the partition plate 500, the direction in which the cooling liquid 300 flows by convection is surely determined, so that the convection effect is promoted.

  6 and 7 illustrate the case where the partition plate 500 is provided only in the second portion 202, the partition plate 500 may be provided in the first portion 201. Alternatively, it may be provided so as to straddle the first portion 201 and the second portion 202.

  As described above, according to the electro-optical device according to the third embodiment, since the convection of the cooling liquid 300 is promoted by the partition plate 500, the heat of the cooling liquid 300 can be dissipated outside the device. it can. Therefore, it is possible to cool the counter substrate 20 more effectively.

<Electronic equipment>
Next, the case where the liquid crystal device which is the above-described electro-optical device is applied to various electronic devices will be described. FIG. 8 is a plan view showing a configuration example of the projector. Hereinafter, a projector using the liquid crystal device as a light valve will be described.

  As shown in FIG. 8, a projector 1100 includes a lamp unit 1102 made of a white light source such as a halogen lamp. The projection light emitted from the lamp unit 1102 is separated into three primary colors of RGB by four mirrors 1106 and two dichroic mirrors 1108 arranged in the light guide 1104, and serves as a light valve corresponding to each primary color. The light enters the liquid crystal panels 1110R, 1110B, and 1110G.

  The configurations of the liquid crystal panels 1110R, 1110B, and 1110G are the same as those of the liquid crystal device described above, and are driven by R, G, and B primary color signals supplied from the image signal processing circuit. The light modulated by these liquid crystal panels enters the dichroic prism 1112 from three directions. In the dichroic prism 1112, R and B light is refracted at 90 degrees, while G light travels straight. Therefore, as a result of the synthesis of the images of the respective colors, a color image is projected onto the screen or the like via the projection lens 1114.

  Here, paying attention to the display images by the liquid crystal panels 1110R, 1110B, and 1110G, the display image by the liquid crystal panel 1110G needs to be horizontally reversed with respect to the display images by the liquid crystal panels 1110R and 1110B.

  In addition, since light corresponding to each primary color of R, G, and B is incident on the liquid crystal panels 1110R, 1110B, and 1110G by the dichroic mirror 1108, it is not necessary to provide a color filter.

  In addition to the electronic device described with reference to FIG. 8, a mobile personal computer, a mobile phone, a liquid crystal television, a viewfinder type, a monitor direct-view type video tape recorder, a car navigation device, a pager, an electronic device Examples include a notebook, a calculator, a word processor, a workstation, a videophone, a POS terminal, and a device equipped with a touch panel. Needless to say, the present invention can be applied to these various electronic devices.

  In addition to the liquid crystal devices described in the above embodiments, the present invention includes a reflective liquid crystal device (LCOS), a plasma display (PDP), a field emission display (FED, SED), an organic EL display, and a digital micromirror device. (DMD), electrophoresis apparatus and the like are also applicable.

  The present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit or idea of the invention that can be read from the claims and the entire specification, and an electro-optical device with such a change. In addition, an electronic apparatus including the electro-optical device is also included in the technical scope of the present invention.

FIG. 3 is a plan view illustrating a configuration of a panel portion of the electro-optical device according to the embodiment. It is the HH 'sectional view taken on the line of FIG. 1 is a side view illustrating an overall configuration of an electro-optical device according to a first embodiment. It is a side view which shows the manufacturing method of the dustproof board | substrate which concerns on 1st Embodiment. FIG. 6 is a side view illustrating an overall configuration of an electro-optical device according to a second embodiment. FIG. 9 is a side view illustrating an overall configuration of an electro-optical device according to a third embodiment. It is a perspective view which shows the structure of the dustproof board | substrate which concerns on 3rd Embodiment. It is a top view which shows the structure of the projector which is an example of the electronic device to which the electro-optical apparatus is applied.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... TFT array substrate, 10a ... Image display area, 20 ... Counter substrate, 50 ... Liquid crystal layer, 101 ... Data line drive circuit, 102 ... External circuit connection terminal, 104 ... Scanning line drive circuit, 200 ... Dust-proof substrate, 201 ... 1st part, 202 ... 2nd part, 210 ... Main body part, 220 ... Lid part, 250 ... Antireflection film, 300 ... Liquid for cooling, 400 ... Radiator, 500 ... Partition plate

Claims (7)

An electro-optical device that displays an image by projecting light,
A pair of substrates sandwiching the electro-optic material;
A first portion through which the light passes and a position above the first portion are provided so as to be in contact with a surface of the pair of substrates on the light incident side that does not face the electro-optic material. And a dust-proof substrate having a second portion through which the light does not pass,
An electro-optical device, wherein the dust-proof substrate is filled with a liquid that can be convected between the first portion and the second portion.   The electro-optical device according to claim 1, wherein a refractive index of the liquid is the same as a refractive index of a member constituting the dustproof substrate. Provided above the dust-proof substrate, further comprising a heat radiating portion made of a member having higher thermal conductivity than the dust-proof substrate;
The electro-optical device according to claim 1, wherein the liquid can be convected between the second portion and the heat radiating portion. The heat dissipating part has a mesh-like mesh part capable of convection with the liquid,
The electro-optical device according to claim 3, wherein the mesh portion is formed such that the mesh portion becomes finer as it is higher.   The convection promoting portion that is provided inside the dust-proof substrate and further promotes convection of the liquid by partitioning the liquid flowing upward and the liquid flowing downward. 5. The electro-optical device according to any one of items 1 to 4.   The anti-reflection film is further provided on a surface of the dust-proof substrate on which the light is incident, and prevents the light from being reflected when entering the dust-proof substrate. The electro-optical device according to any one of 1 to 5.   An electronic apparatus comprising the electro-optical device according to claim 1.

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