JP2010256666A - Electrooptical device and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To to display a high quality image by efficiently cooling an electrooptical panel such as a reflective liquid crystal panel. <P>SOLUTION: An electrooptical device (100) includes: a reflective electrooptical panel (100); a first holding member (610) which holds the peripheral side of the electrooptical panel; and second holding members (300, 400) which are arranged opposite to each other on a non-display surface of the electrooptical panel, and each of which includes a Peltier element (300) having a cooling part which contacts at least one of the non-display surface and the first holding member, and which hold the electrooptical panel from the non-display surface side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  For example, an electro-optical device that is used as a light valve of a liquid crystal projector, and an electro-optical panel such as a reflective liquid crystal panel is mounted or accommodated in a mounting case, and an electronic device such as a liquid crystal projector that includes the electro-optical device. It relates to the technical field of equipment.

  In this type of electro-optical device, for example, a reflective electro-optical panel such as a reflective liquid crystal panel is mounted or accommodated in a mounting case. When such an electro-optical device is used as a light valve for a liquid crystal projector, for example, in order to perform an enlarged projection on a screen, the electro-optical device is incident with a strong light source from a light source collected. To do. When such powerful light source light is incident, the temperature of the electro-optical device increases, and the display performance of the electro-optical device may be degraded. For this reason, measures for heat dissipation of the electro-optical device are required.

  For example, in Patent Document 1, a heat sink is provided on the back surface of a reflective liquid crystal panel (that is, the surface opposite to the surface on which display light enters and exits), and cooling air is sent by a fan, thereby dissipating heat from the liquid crystal panel. A technique for promoting the above is disclosed.

JP 2008-70575 A

  However, the heat sink as disclosed in Patent Document 1 has a technical problem that the heat dissipation of the electro-optical device may not be sufficiently improved.

  The present invention has been made in view of, for example, the above-described problems and the like. An electro-optical device capable of efficiently cooling an electro-optical panel and displaying a high-quality image, and an electronic device including such an electro-optical device. It is an object to provide a device.

  In order to solve the above-described problems, an electro-optical device according to an aspect of the invention includes a reflective electro-optical panel, a first holding member that holds a peripheral portion of the electro-optical panel, and a side opposite to the display surface of the electro-optical panel. A Peltier element that is disposed so as to face the non-display surface and has a cooling portion that contacts at least one of the non-display surface and the first holding member, and holds the electro-optical panel from the non-display surface side And a second holding member.

  The electro-optical device of the present invention includes a reflective electro-optical panel, a first holding member, and a second holding member.

  The reflection type electro-optical panel is, for example, a reflection type liquid crystal panel. For example, an element substrate on which a pixel switching transistor, a data line, a scanning line, a reflection type pixel electrode, and the like are formed, and a counter electrode are formed. An electro-optical material such as liquid crystal is sandwiched between the opposite substrate. There are various modes for driving the electro-optical panel. For example, when an image signal is turned on and off from a transistor electrically connected between the data line and the pixel electrode, the transistor from the data line at a predetermined timing is used. An image can be displayed by a so-called active matrix system, which is supplied to the pixel electrode via the.

  In the present invention, the electro-optical panel is of a reflective type, for example, each pixel electrode is formed of a reflective film such as an Al (aluminum) film alone, or a transparent conductive film such as ITO (Indium Tin Oxide) and an Al film, for example. It is configured such that light incident from the light source is reflected by each pixel electrode and emitted as display light from the electro-optical panel by being laminated with a reflective film such as Has been.

  The first holding member is a member that holds the peripheral portion of the electro-optical panel, and constitutes a mounting case that houses the electro-optical panel together with a second holding member described later. The first holding member is made of, for example, aluminum. For example, the first holding member is formed to have a frame-like opening that defines an opening for accommodating the electro-optical panel, and the electro-optical panel is surrounded by the opening of the frame from the peripheral edge side thereof. It is accommodated in the opening.

  The second holding member is disposed so as to face the non-display surface opposite to the display surface of the electro-optical panel, thereby holding the electro-optical panel from the non-display surface side.

  In the present invention, in particular, the second holding member includes a Peltier element having a cooling portion in contact with at least one of the non-display surface of the electro-optical panel and the first holding member. In principle, the Peltier element transfers heat from the cooling unit to the heating unit when a voltage is applied. Therefore, the electro-optical panel can be efficiently cooled. That is, in the present invention, in particular, the cooling unit of the Peltier element included in the second holding member includes at least a non-display surface of the electro-optical panel and a first holding member that holds the electro-optical panel while surrounding the peripheral side. Since it is in contact with one side, the electro-optical panel, which is a heat generation source (that is, a heat generation source) during operation of the electro-optical device, can be directly cooled from the non-display surface side by the Peltier element, or the peripheral edge side Can be cooled by the Peltier element through the first holding member.

  The cooling unit of the Peltier element is preferably in contact with the entire non-display surface of the electro-optical panel. In this case, heat can be more efficiently transmitted from the electro-optical panel to the Peltier element, and therefore, the electro-optical panel can be cooled more efficiently by the Peltier element.

  Here, in the present invention, since the electro-optical panel is cooled by the Peltier element, the electro-optical panel is cooled by, for example, simply arranging a heat sink made of metal so as to be in contact with the non-display surface of the electro-optical panel. Compared to the case, the electro-optical panel can be effectively cooled. That is, in the present invention, instead of waiting for heat to be conducted passively due to thermal conductivity, for example, just like a heat sink made of metal, the heat is actively cooled using a Peltier element, A more excellent cooling effect can be obtained.

  In addition, when performing heat dissipation using a heat sink, the heat dissipation efficiency depends on the temperature difference between the outside air and the heat sink. For example, when the electro-optical device is placed in a relatively high temperature environment, the temperature between the outside air and the heat sink The difference is reduced and the heat dissipation efficiency of the heat sink is also reduced. In that respect, according to the present invention, since the Peltier element can dissipate heat by the cooling unit by applying a voltage, it is hardly affected by the outside air, and good cooling efficiency can be ensured. That is, by adopting a Peltier element as a cooling means for cooling the electro-optical panel as in the present invention, good cooling efficiency can be ensured even under various use conditions.

  Further, the cooling unit of the Peltier element is not necessarily provided so as to be in direct contact with the electro-optical panel that is a heat source, and may be disposed so as to be in contact with at least one of the electro-optical panel and the first holding member. When the first holding member that partially constitutes the mounting case of the electro-optical panel is formed of a material having excellent thermal conductivity such as aluminum, not only the second holding member but also the first holding member is electro-optical. May contribute to panel cooling. In this case, the cooling efficiency of cooling the electro-optical panel can be increased by arranging the first holding member so as to contact the cooling portion of the Peltier element.

  Further, since the cooling capacity of the Peltier element depends on the voltage value applied to the Peltier element, the degree of cooling can be adjusted according to the use state of the electro-optical device. For example, by switching on / off the cooling by the Peltier element in accordance with the power consumption state of the electro-optical panel, it is possible to achieve both the power saving of the electro-optical device and the efficient cooling effect.

  As described above, according to the electro-optical device of the present invention, since the second holding member includes the Peltier element, the electro-optical panel can be efficiently cooled. As a result, a high-quality image can be displayed.

  In one aspect of the electro-optical device of the present invention, the electro-optical panel includes an element substrate having the non-display surface as one substrate surface, and the other substrate surface different from the one substrate surface of the element substrate. A plurality of reflective pixel electrodes provided on the substrate, and having a higher thermal conductivity than the element substrate between the one substrate surface and the cooling unit, and bonding the element substrate and the Peltier element Adhesive.

  According to this aspect, the electro-optical panel includes, for example, the back surface of the element substrate on which the pixel switching transistors, the data lines, the scanning lines, the reflective pixel electrodes, and the like are formed (that is, the side facing the second holding member). Are arranged on the non-display surface side. The reflective pixel electrode is formed on the element substrate in a matrix for each pixel, for example. The electro-optical panel is configured to display an image by reflecting light incident from a light source by each pixel electrode and emitting the light as display light from the electro-optical panel.

  In this embodiment, in particular, the non-display surface of the electro-optical panel and the cooling part of the Peltier element are bonded together with an adhesive. When the electro-optical panel and the cooling part of the Peltier element are arranged so as to be in contact with each other, in fact, a minute gap occurs on the contact surface (that is, the interface) between the electro-optical panel and the cooling part of the Peltier element. Compared to an ideal case where no gap is generated, the cooling efficiency for cooling the electro-optical panel by the Peltier element is lowered. Therefore, in this embodiment, the gap formed on the contact surface is filled with the adhesive, thereby filling the generated gap and improving the cooling efficiency.

  Here, the adhesive is made of a material having a higher thermal conductivity than the material forming the element substrate so that heat can be quickly transferred between the electro-optical panel and the cooling part of the Peltier element. Moreover, it is preferable that the adhesive has sufficient flexibility in a state before solidifying. In this case, since the adhesive can enter the fine gap and fill the gap evenly, a more excellent cooling effect can be obtained.

  In another aspect of the electro-optical device according to the aspect of the invention, a heat conductive member having higher heat conductivity than the first holding member is provided between the electro-optical panel and the first holding member.

  In addition to the second holding member including the Peltier element, the electro-optical panel is cooled by a first holding member that holds the electro-optical panel while surrounding the electro-optical panel from the peripheral side. In particular, when the first holding member is formed of a metal having excellent thermal conductivity such as aluminum, the first holding member has excellent heat dissipation. Here, the first holding member is formed so as to surround the electro-optical panel from the peripheral edge side, and a gap is generated between the electro-optical panel and the first holding member. When such a gap is large, the amount of heat transmitted to the first holding member is reduced, and the heat dissipation efficiency is lowered. Therefore, in this aspect, the heat dissipation efficiency of the first holding member is improved by providing a heat conductive member having thermal conductivity so as to fill the gap.

  Here, the heat conducting member is formed of a material having a higher thermal conductivity than the material forming the first holding member so that heat can be quickly transferred between the electro-optical panel and the first holding member. Yes.

  In another aspect of the electro-optical device of the present invention, a heat radiating member is provided so as to be in contact with the heat generating portion of the Peltier element.

  As described above, the Peltier element has a heat generating part for radiating the heat absorbed from the cooling part in principle. In this aspect, in order to dissipate the heat generated from the heat generating part of the Peltier element efficiently, a heat radiating member is provided so as to be in contact with the heat generating part of the Peltier element. The heat dissipating member is preferably formed of a material having excellent heat conductivity, such as aluminum, in order to further improve heat dissipation. That is, the heat radiating member functions as a heat sink.

  In the aspect in which the above-described heat radiating member includes a heat radiating plate, the heat radiating member may have a heat radiating fin.

  According to this aspect, since the surface area of the heat radiating plate is increased by forming the fins, the amount of heat accumulated in the heat radiating member can be radiated to the outside air more efficiently than in the case where the fins are not formed. Is possible.

  In addition, when heat is radiated from the heat radiating member, a fan for blowing air is used to prevent the heat radiation efficiency of the heat radiating member from deteriorating due to retention of high temperature outside air around the heat radiating member. May be provided.

  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 display device such as a liquid crystal projector, a television, a mobile phone, an electronic notebook, a word processor, and a viewfinder type Alternatively, various electronic devices such as a monitor direct-view 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 effect | action and other gain of this invention are clarified from the form for implementing demonstrated below.

It is a disassembled perspective view which shows the whole structure of the liquid crystal device which concerns on this embodiment. It is a perspective view which shows the external appearance of the liquid crystal device which concerns on this embodiment. It is a top view which shows the whole structure of the liquid crystal panel which concerns on this embodiment. It is sectional drawing in the H-H 'line | wire of FIG. It is sectional drawing along the Y direction of the liquid crystal device which concerns on this 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.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, a liquid crystal device is taken as an example of an electro-optical device according to the invention.

  First, the overall configuration of the liquid crystal device according to the present embodiment will be described with reference to FIGS. 1 and 2.

  FIG. 1 is an exploded perspective view showing the overall configuration of the liquid crystal device according to the present embodiment. FIG. 2 is a perspective view showing an appearance of the liquid crystal device according to the present embodiment.

  As shown in FIG. 1, the liquid crystal device 100 according to the present embodiment includes a liquid crystal panel 1, a frame 610, a Peltier element 300, and a heat sink 400.

  The liquid crystal panel 1 is configured as a reflective liquid crystal panel having a structure in which a liquid crystal layer is sandwiched between a pair of substrates each formed from a transparent substrate such as a glass substrate. The configuration of the liquid crystal panel 1 will be described later with reference to FIGS.

  A wiring board 150 including signal wirings for sending various control signals to the liquid crystal panel 1 is electrically connected to the liquid crystal panel 1. On the wiring substrate 150, a driving IC chip 160 that is electrically connected to at least a part of the plurality of signal wirings and includes at least a part of a driving circuit for driving the liquid crystal panel 1 is disposed. The driving IC chip 160 includes, for example, a part of the data line driving circuit and is fixed to the wiring board 150 electrically and mechanically using TAB (Tape-Automated Bonding) technology. ing. These wiring boards are formed by patterning signal wiring or the like on a base material such as polyimide.

  As shown in FIG. 2, the wiring board 150 has the other end opposite to one end connected to the liquid crystal panel 1 drawn out to the outside of a frame 610 described later, and is connected to an external circuit (not shown). The

  In FIG. 1, a frame 610 holds the liquid crystal panel 1 while surrounding the liquid crystal panel 1 from the peripheral edge side. The frame 610 is formed with a recess 620 for fitting the liquid crystal panel 1. The recessed portion of the recess 620 is opened (that is, an opening 640 is formed), and incident light can be incident on the liquid crystal panel 1 through the opening 640. Further, the display light from the liquid crystal panel 1 is emitted through the opening 640.

  A Peltier element 300 for cooling the liquid crystal panel 1 is disposed on the non-display surface side of the liquid crystal panel 1. In the frame 610, a recess 630 for fitting the Peltier element 300 is formed.

  The heat sink 400 is disposed so as to be in contact with the surface of the Peltier element 300 on the side not facing the non-display surface of the liquid crystal panel 1. By providing the heat sink 400 in this manner, heat generated when the liquid crystal panel is cooled by the Peltier device 300 can be dissipated from the heat sink 400 into the outside air.

  Next, the liquid crystal panel according to the present embodiment will be described with reference to FIGS.

  FIG. 3 is a plan view showing the overall configuration of the liquid crystal panel according to the present embodiment, and FIG. 4 is a cross-sectional view taken along the line H-H ′ in FIG. 3. In FIGS. 3 and 4, in order to make each layer and each member recognizable on the drawing, the scales of each layer and each member may be illustrated with different scales.

  As shown in FIGS. 3 and 4, in the liquid crystal panel 1, the TFT array substrate 10 and the counter substrate 20 are disposed to face each other. The TFT array substrate 10 is made of, for example, a transparent substrate such as a glass substrate or a quartz substrate, or a silicon substrate. The counter substrate 20 is made of a transparent substrate such as a glass substrate or a quartz substrate. A liquid crystal layer 50 is sealed between the TFT array substrate 10 and the counter substrate 20, and the TFT array substrate 10 and the counter substrate 20 are provided with a sealing material 52 provided in a seal region positioned around the image display region 10a. Are bonded to each other. The sealing material 52 is made of an ultraviolet curable resin for bonding the two substrates, and is applied on the TFT array substrate 10 in the manufacturing process and then cured by ultraviolet irradiation. Further, a gap material (not shown) such as glass fiber or glass bead for spraying a predetermined value for the distance between the TFT array substrate 10 and the counter substrate 20 (inter-substrate gap) is scattered in the sealing material 52. Yes.

  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. However, 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 where the sealing material 52 is disposed. 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.

  With respect to the four corner portions of the counter substrate 20, the vertical conductive member 106 is disposed between the two substrates. On the other hand, the TFT array substrate 10 is provided with vertical conduction terminals in a region facing these corner portions. Thus, electrical conduction can be established between the TFT array substrate 10 and the counter substrate 20.

  In FIG. 4, on the TFT array substrate 10, a laminated structure in which pixel switching TFTs as drive elements, wirings such as scanning lines and data lines are formed is formed. Although a detailed description of the laminated structure is omitted, the image display area 10a includes a reflection type pixel electrode 9a serving as a reflection electrode on the upper layer of a pixel switching TFT, a scanning line, a data line or the like. Is provided. The pixel electrode 9a is typically made of a light-reflective material such as aluminum in an island shape with a predetermined pattern for each pixel so that incident light can be reflected.

  An alignment film (not shown) is formed on the pixel electrode 9a. On the other hand, a light shielding film 23 is formed on the surface of the counter substrate 20 facing the TFT array substrate 10. A counter electrode 21 made of a transparent material such as ITO is formed on the light shielding film 23 so as to face the plurality of pixel electrodes 9a. An alignment film (not shown) is formed on the counter electrode 21. A transparent dustproof glass 200, which is an example of a dustproof substrate, is provided on the surface of the counter substrate 20 opposite to the surface facing the TFT array substrate 10 so that dust and the like are not accumulated.

  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.

  When the liquid crystal panel 1 is driven, an image signal is supplied to the pixel electrode 9a for each pixel, and is held between the counter electrode 21 for a certain period. The liquid crystal that constitutes the liquid crystal layer 50 in accordance with the voltage level applied in this manner modulates light and enables gradation display by changing the orientation and order of the molecular assembly.

  Although not shown here, on the TFT array substrate 10, in addition to the data line driving circuit 101, the scanning line driving circuit 104, etc., a sampling circuit for sampling the image signal on the image signal line and supplying it to the data line, A precharge circuit for supplying a precharge signal of a predetermined voltage level to a plurality of data lines in advance of an image signal, an inspection circuit for inspecting quality, defects, etc. of the liquid crystal device during manufacture or at the time of shipment, for inspection A pattern or the like may be formed.

  Next, the internal configuration of the liquid crystal device according to the present embodiment will be described with reference to FIG. 5 in addition to FIG. 1 and FIG. FIG. 5 is a cross-sectional view of the liquid crystal device according to this embodiment along the Y direction.

  The liquid crystal panel 1 is held by a frame 610 which is an example of the “first holding member” in the present invention so as to be surrounded from the peripheral edge side. The Peltier element 300, which is an example of the “second holding member” in the present invention, faces the non-display surface of the liquid crystal panel 1 (that is, the surface opposite to the side on which incident light and reflected light enter and exit). And a mounting case together with the frame 610.

  The Peltier device 300 includes a cooling unit 300a, a heat generating unit 300b, and a semiconductor unit 300c. When a predetermined voltage is applied between the cooling unit 300a and the heat generating unit 300b, heat is transferred from the cooling unit 300a to the heat generating unit 300b, so that the liquid crystal panel 1 arranged so as to be in contact with the cooling unit 300a can be cooled. . Note that various known Peltier elements can be used as the Peltier element 300.

  The Peltier element 300 is fixed to the frame 610 by being fitted into a recess 630 formed in the frame 610, and the cooling unit 300 a is in contact with the non-display surface of the liquid crystal panel 1. On the other hand, the heat generating portion 300b of the Peltier element 300 is arranged so that the surface opposite to the surface facing the liquid crystal panel 1 is in contact with the heat sink 400, and the generated heat can be dissipated by the heat sink 400. Has been.

  The heat sink 400 is preferably formed of a material having excellent thermal conductivity, for example, a metal such as aluminum, in order to make the cooling using the Peltier element 300 more efficient. In this embodiment, the heat sink 400 is formed independently of the frame 610, but may be formed integrally with the frame 610.

  By providing the cooling unit 300a of the Peltier element 300 so as to be in contact with the liquid crystal panel 1 that is a heat source, the temperature rise in the liquid crystal panel 1 and the frame 610 is suppressed by being irradiated with incident light. In particular, since the Peltier device 300 has a cooling capability, the Peltier device 300 has an excellent cooling effect compared to a case where the liquid crystal panel 1 is simply placed in contact with a normal temperature heat sink that does not have a cooling capability. Obtainable. That is, it is possible to obtain a good heat radiation effect by actively cooling by a Peltier element, rather than waiting for heat to be conducted passively by heat conductivity like a heat sink.

  Here, in reality, fine irregularities exist on the surface of the TFT array substrate 10 constituting the liquid crystal panel 1 facing the Peltier element 300 (that is, the surface of the non-display surface of the liquid crystal panel 1). On the other hand, fine irregularities are also present on the surface of the Peltier element 300 facing the liquid crystal panel 1. Therefore, when the liquid crystal panel 1 and the Peltier element 300 are arranged so as to be in contact with each other, a fine gap is generated on the contact surface. Therefore, in this embodiment, the adhesive 500 having excellent thermal conductivity is interposed on the contact surface so that the generated gap is filled and heat is efficiently transmitted to the heat sink 400.

  By cooling the liquid crystal panel 1 using the Peltier element 300 in this way, when the liquid crystal device 100 according to the present embodiment is placed in a relatively high temperature environment, the Peltier element 300 is not used and only the heat sink is used. If the cooling is attempted, the cooling efficiency is remarkably lowered. However, the Peltier element 300 can always obtain a predetermined cooling capacity by the cooling unit 300a as long as a voltage is applied, and a good cooling effect can be ensured. .

  Further, since the cooling capacity of the Peltier element 300 depends on the voltage value applied to the Peltier element 300, the degree of cooling can be adjusted according to the use state of the liquid crystal device 100. For example, the cooling by the Peltier element 300 can be switched on and off in accordance with changes in the power consumption status and usage environment of the liquid crystal device 100.

  Particularly in the present embodiment, the heat sink 400 is provided with heat radiating fins. Since the surface area of the heat sink 400 in contact with the outside air is increased by forming the radiation fins in this manner, it is possible to radiate heat to the outside more efficiently.

  In the present embodiment, the radiating fin is formed over the entire surface of the heat sink 400 opposite to the surface facing the heat generating portion 300b of the Peltier element 300. This is useful because the heat dissipation efficiency can be improved.

  In the present embodiment, the heat radiation fin is integrally formed as a part of the heat sink 400, but the heat sink 400 and the heat radiation fin may be formed as separate members.

A gap formed between the liquid crystal panel 1 and the frame 610 is filled with a heat conductive member 800 having heat conductivity. The heat generated in the liquid crystal panel 1 is dissipated from the frame 610 in addition to the heat dissipation member including the Peltier element 300. Here, the frame 610 is formed so as to surround the liquid crystal panel 1, but there is a gap between the liquid crystal panel 1 and the frame 610. Even if such a gap occurs, the gap is filled with a heat conductive member 800 having thermal conductivity so that heat generated in the liquid crystal panel 1 can be efficiently transmitted to the frame 610.
<Electronic equipment>
Next, the case where the reflective liquid crystal device, which is the above-described electro-optical device, is applied to an electronic device will be described. Here, a projection type liquid crystal projector is taken as an example of the electronic apparatus according to the present invention. FIG. 6 is a schematic sectional view of the projection type liquid crystal projector according to the present embodiment.

  In FIG. 6, a liquid crystal projector 1100 according to this embodiment is constructed as a multi-plate color projector using three liquid crystal light valves 100R, 100G, and 100B for RGB. Each of the liquid crystal light valves 100R, 100G, and 100B uses the reflective liquid crystal device 100 described above.

  As shown in FIG. 6, 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, two mirrors 1106, two dichroic mirrors 1108, and three polarization beam splitters (PBS) ) 1113 is divided into light components R, G, and B corresponding to the three primary colors of RGB and led to the liquid crystal light valves 100R, 100G, and 100B corresponding to the respective colors. At this time, in order to prevent light loss in the optical path, a lens may be appropriately provided in the middle of the optical path. The light components corresponding to the three primary colors modulated by the liquid crystal light valves 100R, 100G, and 100B are combined by the cross prism 1112 and then projected as a color image on the screen 1120 via the projection lens 1114.

  Since light corresponding to the primary colors R, G, and B is incident on the liquid crystal light valves 100R, 100B, and 100G by the dichroic mirror 1108 and the polarization beam splitter 1113, there is no need to provide a color filter.

Each of the liquid crystal light valves 100R, 100G, and 100B is formed by housing a reflective liquid crystal panel 1 in a mounting case, as will be described later. In the following description, the liquid crystal light valve 100R corresponding to red will be described, but the same applies to the other liquid crystal light valves 100G and 100B.
In addition to the electronic device described with reference to FIG. 6, 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, and an electronic notebook , Calculators, word processors, workstations, videophones, POS terminals, devices with touch panels, and the like. 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 is not limited to a reflective liquid crystal device (LCOS), a plasma display (PDP), a field emission display (FED, SED), or an organic EL device. The present invention can also be applied to a display, a digital micromirror device (DMD), an electrophoresis apparatus, and the like.

  In addition to the liquid crystal projector as described above, the present invention can also be applied to various electronic devices such as a video camera, a television, a mobile phone, a POS terminal, a touch panel, and a digital camera having an electronic viewfinder.

  The present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit or concept of the invention that can be read from the claims and the entire specification. Electronic devices are also included in the technical scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Liquid crystal panel, 10a ... Image display area, 100 ... Liquid crystal light valve, 200 ... Protective member, 300 ... Peltier element, 300a ... Cooling part, 300b ... Heat generating part, 300c ... Semiconductor part, 400 ... Heat sink, 500 ... Adhesive 610 ... Frame, 800 ... Heat conducting member,

Claims (6)

A reflective electro-optic panel;
A first holding member for holding a peripheral portion of the electro-optic panel;
A Peltier element having a cooling portion disposed so as to face a non-display surface opposite to the display surface of the electro-optical panel and having at least one of the non-display surface and the first holding member; An electro-optical device comprising: a second holding member that holds the electro-optical panel from the non-display surface side. The electro-optical panel includes an element substrate having the non-display surface as one substrate surface, and a plurality of reflective pixel electrodes provided on the other substrate surface different from the one substrate surface of the element substrate. Including
The adhesive agent which adheres the said element substrate and the said Peltier element is provided between the said one substrate surface and the said cooling part, which has thermal conductivity higher than the said element substrate. Electro-optic device.   The electro-optical device according to claim 1, further comprising a heat conductive member having a higher thermal conductivity than the first holding member between the electro-optical panel and the first holding member.   The electro-optical device according to any one of claims 1 to 3, further comprising a heat dissipation member provided so as to be in contact with a heat generating portion of the Peltier element.   The electro-optical device according to claim 4, wherein the heat radiating member includes a heat radiating fin.   An electronic apparatus comprising the electro-optical device according to claim 1.

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