JP2010008845A - Electro-optical device, package case, and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electro-optical device, package case, and electronic equipment which suppress temperature increase of the package case due to absorption of light flux energy to the package case and deterioration of a surface property by effect of light flux reflected on the reflection surface of the package case. <P>SOLUTION: The electro-optical device comprises: an electro-optical element; and the package case for accommodating the electro-optical element. The package case comprises: an opening formed corresponding to one side of the electro-optical element; and a slope formed on the periphery of the opening inclined to one side of the electro-optical element. Each inner wall side of the package case forming the opening is formed approximately vertical to one side of the electro-optical element. The slope is inclined in the direction to prevent the reflected light flux approximately entering one side of the electro-optical element and being reflected toward the slope from intersecting a light flux which enters the side of the electro-optical element approximately vertically. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electro-optical device in which an electro-optical element is accommodated in a mounting case, a mounting case that accommodates the electro-optical element, and an electronic apparatus including the electro-optical device.

  2. Description of the Related Art Conventionally, an electro-optical device including an electro-optical element such as a liquid crystal panel that modulates a light beam emitted from a light source according to image information or the like is known. In such an electro-optical device, the life of the liquid crystal panel may be shortened due to a rapid progress of deterioration due to an increase in the temperature of the liquid crystal panel. Patent Document 1 discloses a display device that suppresses a rise in temperature by providing a heat dissipation film and a heat dissipation body for releasing heat of the display panel to facilitate release of heat of the display panel.

  Further, in the display panel, in order for the light beam to strike the display area that allows the modulated light beam to pass therethrough, the light beam emitted from the light source must be applied to the mounting case that holds the display panel. In some cases, the temperature of the mounting case rises when the luminous flux strikes, and the temperature of the display panel rises when the temperature of the mounting case rises. Patent Document 2 discloses a projector that suppresses an increase in the temperature of the mounting case due to the light beam by providing a reflective surface that reflects the light beam that strikes the mounting case outside the image forming region (display region).

JP 2003-58065 A JP 2007-199279 A

  However, there is a possibility that the light beam reflected by the reflecting surface is incident on the display area. There has been a problem that display characteristics may deteriorate due to, for example, luminance unevenness caused by an extra light beam entering the display area.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 An electro-optical device according to this application example is an electro-optical device including an electro-optical element and a mounting case for housing the electro-optical element. An opening provided corresponding to a pixel region of the optical element; and an inclined surface formed around the opening and inclined with respect to one surface of the electro-optical element; and An inner wall surface of the mounting case to be defined is formed substantially perpendicular to the one surface of the electro-optic element.

According to this electro-optical device, the portion of the light beam irradiated toward the pixel region of the electro-optical element that is out of the opening is irradiated onto the slope formed around the opening. Since the inclined surface is inclined with respect to one surface of the electro-optic element, the light beam is more easily reflected than a surface facing the same direction as the surface of the electro-optic element. An increase in temperature can be suppressed.
Each inner wall surface of the mounting case that forms the opening is formed substantially perpendicular to one surface of the electro-optic element, so that it is substantially parallel to the light beam incident substantially perpendicular to the surface of the electro-optic element. . As a result, since the light beam incident on the surface of the electro-optic element almost perpendicularly is not irradiated to each inner wall surface of the opening, the light hitting the inner wall surface of the opening is absorbed and the temperature of the mounting case is increased. It is possible to suppress the rise. In addition, it is possible to suppress the influence of the luminous flux reflected on the inner wall surface from being incident on a part of one surface of the electro-optic element, such as a change in luminance of the part.

  Application Example 2 In the electro-optical device according to the application example, the inclined surface can be incident on the one surface substantially perpendicularly and the reflected light beam reflected by the inclined surface can be incident on the one surface substantially perpendicularly. It is preferable to be inclined so as to be reflected in a direction that avoids crossing with a light beam.

  According to this electro-optical device, the reflected light beam reflected by the inclined surface is reflected in a direction that avoids crossing with a light beam that can be incident substantially perpendicularly on one surface of the electro-optical element. Since there is almost no possibility of being incident on one surface of the electro-optic element, there is a possibility that the reflected light beam is incident on a part of one surface of the air-optic element, and that the luminance of the part is affected. Can be almost eliminated.

  Application Example 3 In the electro-optical device according to the application example, it is preferable that the mounting case and the inclined surface are made of a metal material.

  According to this electro-optical device, by forming the inclined surface with a metal material, it is possible to easily process the inclined surface into a surface state that easily reflects a light beam, compared to a case where the inclined surface is formed using, for example, plastic. Since metal materials are generally easy to conduct heat, by forming the mounting case with a metal material, the mounting case can easily conduct heat, so it is easy to release the heat applied to the mounting case, An increase in the temperature of the mounting case can be suppressed.

  Application Example 4 In the electro-optical device according to the application example, it is preferable that the inclined surface is subjected to a mirror surface treatment.

  According to this electro-optical device, the light beam can be easily reflected by making the inclined surface a mirror surface.

  Application Example 5 In the electro-optical device according to the application example described above, the electro-optical device further includes an optical element provided on a side where a light beam is incident on the electro-optical element, and the inclined surface includes the optical element and the electro-optical element. It is preferable to arrange | position between.

  According to this electro-optical device, the direction of the reflected light beam reflected by the inclined surface changes from that of the incident light beam, so that the reflected light beam does not return to the incident direction as in the case where there is no inclined surface. On the other hand, it is possible to suppress the reflected light beam from irradiating the surface of the optical element that emits the light beam.

  Application Example 6 In the electro-optical device according to the application example, it is preferable that the inclined surface is formed in the mounting case.

  According to this electro-optical device, the inclined surface is integral with the mounting case, and the possibility that the light flux is irradiated to the mounting case without being blocked by the inclined surface due to the displacement of the inclined surface and the mounting case is almost eliminated. be able to.

  Application Example 7 In the electro-optical device according to the application example described above, the reflected light beam provided between the inclined surface and the optical element is reflected on the one surface from the reflected light beam. It is preferable to further include a second inclined surface that is formed so as to be inclined in a direction in which it is reflected toward a direction that avoids crossing with a light beam that can be incident substantially vertically.

  According to this electro-optical device, by reflecting the reflected light beam on the second inclined surface, it is possible to suppress the optical element from being affected by an increase in temperature or the like due to the reflected light beam hitting the optical element. .

  Application Example 8 A mounting case according to this application example is a mounting case for accommodating an electro-optical element, and includes an opening provided corresponding to a pixel region of the electro-optical element, and the opening. An inner wall surface forming the opening is formed on the surrounding periphery and inclined with respect to one surface of the electro-optic element, and the one of the electro-optic elements accommodated in a mounting case It is characterized in that it is formed substantially perpendicular to the surface.

According to this mounting case, a portion of the light beam irradiated toward one surface of the electro-optic element that is off the opening is irradiated onto a slope formed around the opening. Since the inclined surface is inclined with respect to the surface of the pixel area, the light flux is more easily reflected than a surface facing the same direction as one surface, so that the temperature of the mounting case rises by absorbing light. Can be suppressed.
Each inner wall surface of the mounting case that forms the opening is formed substantially perpendicular to one surface, so that it is substantially parallel to the light beam incident substantially perpendicular to one surface, and is formed on one surface. Since almost perpendicularly incident light flux is hardly irradiated on each inner wall surface of the opening, it is possible to prevent the light hitting the inner wall surface of the opening from being absorbed and the temperature of the mounting case from rising. . In addition, it is possible to suppress the influence that the luminous flux reflected by the inner wall surface is incident on one part and the luminance of the part is changed.

  Application Example 9 In the mounting case according to the application example described above, the inclined surface is incident on the one surface substantially perpendicularly, and the reflected light beam reflected by the inclined surface can be incident on the one surface substantially perpendicularly. It is preferable to incline in the direction of reflection in a direction that avoids crossing the light beam.

  According to this mounting case, the reflected light beam reflected by the inclined surface is reflected in a direction that avoids crossing with a light beam that can be incident substantially perpendicularly on one surface of the electro-optic element. Since there is almost no possibility of being incident on the surface of the optical element, the possibility that the reflected light beam is incident on a part of the surface of the electro-optical element is hardly affected by changes in the luminance of the part. it can.

  Application Example 10 In the mounting case according to the application example described above, it is preferable that the portion forming the slope is made of a metal material.

  According to this mounting case, by forming the inclined surface with a metal material, it is possible to easily process the inclined surface into a surface state in which the light flux is easily reflected, as compared with the case of using, for example, plastic. Since metal materials are generally easy to conduct heat, by forming the mounting case with a metal material, the mounting case can easily conduct heat, so it is easy to release the heat applied to the mounting case, An increase in the temperature of the mounting case can be suppressed.

  Application Example 11 In the mounting case according to the application example, it is preferable that the inclined surface is subjected to a mirror finish.

  According to this mounting case, it is possible to easily reflect the light flux by making the slope a mirror surface.

  Application Example 12 An electronic apparatus according to this application example includes the electro-optical device according to the application example.

  According to this electronic apparatus, since the electro-optical device that can suppress the influence of the light beam hitting the mounting case is provided, it is possible to suppress the influence of the light beam outside the effective area.

  Hereinafter, as a preferred embodiment of an electro-optical device, a mounting case, and an electronic apparatus, a liquid crystal light modulation device (liquid crystal light valve) including a liquid crystal modulation panel as an embodiment of the electro-optical device including an electro-optical element, A projection display device as an electronic apparatus including the electro-optical device will be described as an example with reference to the drawings. In the drawings referred to in the following description, the vertical and horizontal scales of members or portions may be shown differently from actual ones for convenience of illustration.

<Projection type display device>
First, the projection display device will be described with reference to FIG. The projection display device modulates a light beam emitted from a light source according to image information to form an optical image, and enlarges and projects the formed optical image on a screen. FIG. 1 is a schematic diagram illustrating a schematic configuration of a projection display device.
As shown in FIG. 1, the projection display device 10 includes a light source device 11, a color separation optical device 12, a relay optical device 14, an optical modulation device 16, and a projection optical device 17.

  The light source device 11 is an optical system for illuminating an image forming region of the light modulation device (liquid crystal panel) substantially uniformly, and includes a light source lamp 21 that emits a light beam, a reflector 22, and a light source lens group 23. Yes. The light beam emitted radially from the light source lamp 21 is converged to a certain position by the reflector 22. The light source lens group 23 includes a plurality of lenses and a lens array, and converts the light beam converged by the reflector 22 into parallel light parallel to the optical axis.

  The color separation optical device 12 is a device that splits the light beam emitted from the light source device 11. The projection display device 10 is a device that displays three colors, and the color separation optical device 12 splits the light beam emitted from the light source device 11 into three colors of red, green, and blue. The color separation optical device 12 includes a dichroic mirror 24a and a dichroic mirror 24b. The dichroic mirror 24a transmits red light and reflects green light and blue light so that the optical axis directions of the green light and blue light are substantially perpendicular to the optical axis direction of the light beam emitted from the light source device 11. In the right direction. The dichroic mirror 24 b transmits blue light and reflects green light, and the direction of the optical axis of the green light is substantially parallel to the direction of the optical axis of the light beam emitted from the light source device 11 and is a light source. The direction of travel is the same as the direction of the luminous flux emitted from the device 11.

  The relay optical device 14 includes an incident side lens 31, a relay lens 32, and reflection mirrors 33a, 33b, and 33c, and has a function of guiding the color light separated by the color separation optical device 12 to the respective liquid crystal light modulation devices 41. ing.

The red light that has passed through the dichroic mirror 24a is reflected by the reflection mirror 33a in the same direction as the green light and blue light reflected by the dichroic mirror 24a, and enters the liquid crystal light modulation device 41R included in the optical modulation device 16. The green light reflected by the dichroic mirror 24b enters the liquid crystal light modulation device 41G included in the optical modulation device 16 as it is.
The blue light transmitted through the dichroic mirror 24 passes through the incident side lens 31, is reflected by the reflection mirror 33 b, passes through the relay lens 32, is reflected by the reflection mirror 33 c, and passes through the other relay lens 32. Then, the light enters the liquid crystal light modulation device 41B included in the optical modulation device 16. The blue light reflected by the reflecting mirror 33b has an optical axis direction parallel to the optical axis direction of red light that has passed through the dichroic mirror 24a and the optical axis direction of green light incident on the liquid crystal light modulation device 41G. Therefore, the light travel direction is the same.
The direction of the optical axis of the blue light reflected by the reflecting mirror 33c is the same as the direction of the optical axis of the red light reflected by the reflecting mirror 33a and the green light and blue reflected by the dichroic mirror 24a. The direction of light is parallel to the direction of the optical axis of light, and the traveling direction of light is the opposite direction. The optical axes of red light, green light, and blue light are in the same plane, and the directions are changed in the plane. Accordingly, the red light incident on the liquid crystal light modulation device 41R and the blue light incident on the liquid crystal light modulation device 41B have substantially the same optical axis position and direction, and the light traveling directions are opposite.

The optical modulation device 16 modulates the three color lights emitted from the color separation optical device 12 according to image information, and combines the modulated color lights to form image light (color image). The optical modulation device 16 includes a liquid crystal light modulation device 41, an incident side polarizing plate 46, an emission side polarizing plate 47, and a cross dichroic prism 48.
As described above, the liquid crystal light modulation device 41 includes the liquid crystal light modulation device 41R for red light, the liquid crystal light modulation device 41G for green light, and the liquid crystal light modulation device 41B for blue light. The liquid crystal light modulation device 41 includes a liquid crystal modulation panel 42 and a mounting case 43 that holds the liquid crystal modulation panel 42. An incident-side polarizing plate 46 is disposed on the light incident side of each liquid crystal light modulation device 41. On the light beam exit side of the liquid crystal light modulation device 41, an exit side polarizing plate 47 is disposed.
The cross dichroic prism 48 is an optical element that forms image light (color image) by synthesizing the modulated light that is modulated for each color light and emitted from the emission-side polarizing plate 47.

  The incident-side polarizing plate 46 receives light of each color whose polarization direction is aligned in approximately one direction by a polarization conversion element (not shown), and is substantially the same as the polarization axis of the light beam aligned by the polarization conversion element among the incident light beams. Only light beams having polarization axes in the same direction are transmitted and other light beams are absorbed. The incident side polarizing plate 46 has a configuration in which a polarizing film is pasted on a translucent substrate such as sapphire glass or quartz.

  The liquid crystal modulation panel 42 constituting the liquid crystal light modulation device 41 has a configuration in which a liquid crystal as an electro-optical material is hermetically sealed between a pair of transparent glass substrates. The liquid crystal modulation panel 42 controls the alignment state of the liquid crystal according to the drive signal from the control device, and modulates the polarization direction of the polarized light beam emitted from the incident side polarizing plate 46. The liquid crystal modulation panel 42 is held by a mounting case 43 that constitutes the liquid crystal light modulation device 41. A specific configuration of the mounting case 43 that holds the liquid crystal modulation panel 42 will be described later.

  The exit-side polarizing plate 47 has the same configuration as the incident-side polarizing plate 46 and has a polarization axis that is orthogonal to the transmission axis of the light flux in the incident-side polarizing plate 46 out of the light beams emitted from the liquid crystal light modulation device 41. Only the light beam is transmitted and other light beams are absorbed.

  The cross dichroic prism 48 is an optical element that forms image light (color image) by combining modulated light modulated for each color light emitted from the emission-side polarizing plate 47. The cross dichroic prism 48 has a square shape in plan view in which four right angle prisms are bonded together, and two dielectric multilayer films are formed on the interface where the right angle prisms are bonded together. These dielectric multilayer films transmit the color light through the output side polarizing plate 47 disposed on the side (G color light side) facing the projection lens 49 of the projection optical device 17, and the remaining two output side polarizing plates. Each color light through 47 (R color light side and B color light side) is reflected. In this way, the color lights modulated by the incident-side polarizing plates 46, the liquid crystal light modulator 41, and the outgoing-side polarizing plates 47 are combined to form a color image.

  The combined light is emitted from the surface of the cross dichroic prism 48 that faces the projection lens 49, and is projected onto the screen 19 by the projection lens 49, and a color image is displayed on the screen 19.

<LCD panel>
Next, the liquid crystal modulation panel 42 will be described with reference to FIG. FIG. 2 is a schematic diagram showing the structure of the liquid crystal modulation panel. 2A is a plan view of the liquid crystal modulation panel as viewed from the counter substrate side together with each component, and FIG. 2B is a cross-sectional shape taken along line HH in FIG. 2A. It is a schematic sectional drawing which shows.
The liquid crystal modulation panel according to this embodiment is a TFT active matrix driving type liquid crystal panel with a built-in driving circuit, which is an example of an electro-optical element.

  As shown in FIG. 2, in the liquid crystal modulation panel 42, the TFT array substrate 55 and the counter substrate 57 are disposed to face each other. The liquid crystal layer 50 is sealed between the TFT array substrate 55 and the counter substrate 57, and the TFT array substrate 55 and the counter substrate 57 are provided with a sealing material 52 provided in a seal region located around the image display region 42a. Are bonded to each other.

  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 55 in the manufacturing process and then cured by ultraviolet irradiation, heating, or the like. It is. Further, a gap material such as glass fiber or glass bead is dispersed in the sealing material 52 so as to set the distance (inter-substrate gap) between the TFT array substrate 55 and the counter substrate 57 to a predetermined value.

  A light-shielding frame light-shielding film 53 that defines the frame area of the image display area 42a is provided on the counter substrate 57 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 55 side.

  Of the area extending around the image display area 42 a, the data line drive circuit 61 and the external circuit connection terminal 62 extend along one side of the TFT array substrate 55 in the area located outside the seal area where the seal material 52 is disposed. Is provided. The scanning line driving circuit 64 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 64 provided on both sides of the image display area 42a in this way, the TFT light shielding film 53 is covered along the remaining side of the TFT array substrate 55. A plurality of wirings 65 are provided.

  Vertical conductive members 66 functioning as vertical conductive terminals between the two substrates are disposed at the four corners of the counter substrate 57. On the other hand, the TFT array substrate 55 is provided with vertical conduction terminals in a region facing these corners. Thus, electrical conduction can be established between the TFT array substrate 55 and the counter substrate 57.

  In FIG. 2B, an alignment film (not shown) is formed on the TFT array substrate 55 on the pixel electrode 69 after the pixel switching TFT, the scanning line, the data line and the like are formed. . On the other hand, on the counter substrate 57, in addition to the counter electrode 67, a lattice-shaped or striped light-shielding film 68 and an alignment film (not shown) are formed in the uppermost layer portion. Further, 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.

  In addition to the data line driving circuit 61, the scanning line driving circuit 64, and the like, other circuits may be formed on the TFT array substrate 55 shown in FIG. As other circuits, a sampling circuit that samples an image signal on an image signal line and supplies it to a data line, a precharge circuit that supplies a precharge signal of a predetermined voltage level to a plurality of data lines before the image signal, and manufacturing An inspection circuit or the like for inspecting the quality, defects, etc. of the electro-optical device in the middle or at the time of shipment may be formed.

<Liquid crystal light modulator>
Next, the configuration of the liquid crystal light modulation device 41 will be described with reference to FIGS. First, main elements constituting the liquid crystal light modulation device 41 will be described. FIG. 3 is an exploded perspective view showing main elements constituting the liquid crystal light modulation device.

As shown in FIG. 3, a liquid crystal light modulation device 41 is an example of an electro-optical device according to the present invention. The liquid crystal modulation panel 42, the mounting case 43, the flexible printed circuit (hereinafter referred to as “FPC”). .) 45).
The FPC 45 is electrically connected to the liquid crystal modulation panel 42 at the portion of the external circuit connection terminal 62 of the liquid crystal modulation panel 42. In the liquid crystal modulation panel 42, the incident surface 57a of the counter substrate 57 on the side where light from the outside is incident, and the emission surface 55a of the TFT array substrate 55 on the side where the incident light passes through the liquid crystal and is modulated and emitted. In addition, an incident dust-proof glass 76 or an emission dust-proof glass 77 as a dust-proof substrate is bonded and fixed to each other. The incident dust-proof glass 76 and the emission dust-proof glass 77 do not project foreign matter or the like attached to the surface of the liquid crystal modulation panel 42 as an image when projecting an image displayed on the liquid crystal light modulation device 41 in the projection display device 10. In order to shift the focus, the thickness is about 1.0 to 2.0 mm.

The mounting case 43 includes a case plate 71 as a holding member, a case cover 72, and a case stopper 73.
The case plate 71 is a housing having a recess for accommodating the liquid crystal modulation panel 42, and has a frame region 71b that supports the peripheral region of the image display region 42a of the liquid crystal modulation panel 42 (the emission surface 77a of the emission dustproof glass 77). is doing. The frame area 71 b is provided with an opening 71 a having a size corresponding to the image display area 42 a of the liquid crystal modulation panel 42.
A side wall 71c, two side walls 71d, and a side wall 71e are formed on the outer periphery of the frame region 71b. At both ends of the side wall 71c and the side wall 71e, attachment holes 71h for attaching the liquid crystal light modulation device 41 to the projection display device 10 are provided. Further, a cutout portion 71g for supporting a flexible wiring board (FPC) 45 connected to the liquid crystal modulation panel 42 to be accommodated is provided on the center side of the side wall 71e. A cylindrical projection 71j is provided at the center of the side wall 71c.

  The case cover 72 has a shape in which four corners, which are positions corresponding to the mounting holes 71 h, of the housing having a recess that accommodates the liquid crystal modulation panel 42 in cooperation with the case plate 71 are cut out. The case cover 72 has a frame region 72b that supports the peripheral region of the image display region 42a of the liquid crystal modulation panel 42 (the incident surface 76a of the incident dustproof glass 76). In the frame region 72b, an opening 72a having a size corresponding to the image display region 42a of the liquid crystal modulation panel 42 is formed. In the case cover 72, a side wall 72c, two side walls 72d, and a side wall 72e are formed so as to surround the frame region 72b. On the side surfaces of the two side walls 72d, hook portions 72f protruding in a substantially triangular prism shape are provided.

  The opening 72 a is formed by four opening walls 721. A slope connecting the edge of the opening 72a (the end of the opening wall 721) and the side wall 72c or the side wall 72e is referred to as an inclined surface 723. A slope connecting the edge of the opening 72a (the end of the opening wall 721) and the side surface of the side wall 72d is referred to as an inclined surface 722. A slope connecting the inclined surface 723 and the inclined surface 722 is referred to as an inclined surface 724. The opening wall 721 and the inclined surface 722, the inclined surface 723, or the inclined surface 724 connected to the opening wall 721 are formed on the inclined wall 721, the inclined surface 723, or the inclined surface 724 connected to the opening wall 721. The angle formed in the vertical cross section is at least less than 90 degrees.

  The inclined surface 722, the inclined surface 723, and the inclined surface 724 are preferably smooth surfaces so as to easily reflect light. More preferably, it is preferably a mirror surface. The material of the case cover 72 is not particularly limited as long as it is a material that can form the case cover 72. However, in order to make the inclined surface 722, the inclined surface 723, and the inclined surface 724 smooth or mirrored, It is preferable to use a metal material.

  The case stopper 73 has a substantially U-shape when viewed from the side, and has an opening 73 a having a size corresponding to the image display area 42 a of the liquid crystal modulation panel 42 on the surface in contact with the case plate 71. Yes. In addition, a hook opening 73 c having a size corresponding to the hook portion 72 f of the case cover 72 is provided in the protruding portion of the bent side wall 73 b at both ends.

  Next, the assembled liquid crystal light modulation device 41 will be described with reference to FIG. FIG. 4 is an external perspective view showing a schematic shape of the liquid crystal light modulation device. As shown in FIG. 4, the liquid crystal modulation panel 42 is sandwiched between the case cover 72 and the case plate 71 together with the incident dust proof glass 76 and the output dust proof glass 77 not shown hidden behind the liquid crystal modulation panel 42, and is mounted on the mounting case 43. Is retained. The FPC 45 having one end connected to the liquid crystal modulation panel 42 is supported by the cutout portion 71g at the middle, and the other end side is exposed to the outside of the mounting case 43.

  The opening walls 721 constituting the opening 72 a of the case cover 72 are substantially perpendicular to the surface of the image display area 42 a of the liquid crystal modulation panel 42 held by the mounting case 43. The inclined surface 722, the inclined surface 723, and the inclined surface 724 of the case cover 72 are formed in a state in which the opening 72 a side bulges to the light incident side as compared with the outer peripheral portion, and is held by the mounting case 43. The liquid crystal modulation panel 42 is inclined with respect to the surface of the image display area 42a on the side opposite to the opening 72a.

  As described above, the light beam incident on the liquid crystal light modulation device 41 is parallel light parallel to the optical axis and is incident from the case cover 72 side, and the optical axis is the surface of the image display region 42 a of the liquid crystal modulation panel 42. It is incident substantially perpendicular to. Therefore, the opening walls 721 constituting the opening 72a of the case cover 72 are formed substantially in parallel with the optical axis of the incident light beam. The inclined surface 722, the inclined surface 723, and the inclined surface 724 of the case cover 72 are formed in a state where the opening 72a side bulges to the light incident side compared to the outer peripheral portion, and the incident light flux When reflected by the surface, the reflected light is reflected to the opposite side of the opening 72a.

<Reflection of incident light beam>
Next, the state in which the light beam incident on the liquid crystal light modulation device 41 is reflected will be described with reference to FIG. FIG. 5 is an explanatory diagram showing the cross-sectional shape of the liquid crystal light modulation device and the states of the incident light beam and the reflected light beam. FIG. 5A is an explanatory diagram showing the cross-sectional shape of the liquid crystal light modulation device and the states of the incident light beam and the reflected light beam in the cross section indicated by AA in FIG. 4, and FIG. It is explanatory drawing which shows the cross-sectional shape of the liquid crystal light modulation apparatus in the cross section shown by BB, and the state of an incident light beam and a reflected light beam.

  As described above, the light beam incident on the liquid crystal light modulation device 41 is transmitted through the incident-side polarizing plate 46 and is incident substantially perpendicular to the surface of the image display region 42 a of the liquid crystal modulation panel 42. An incident dustproof glass 76 is disposed on the side of the liquid crystal modulation panel 42 on which the light flux is incident, and the light flux enters the incident surface 76a of the incident dustproof glass 76 substantially perpendicularly.

  As shown in FIG. 5A, the light beam incident on the opening 72a of the case cover 72 is incident substantially perpendicular to the incident surface 76a (the surface of the image display area 42a of the liquid crystal modulation panel 42) like the light beam L1. Then, the light is modulated by the liquid crystal modulation panel 42 and emitted from the emission dust-proof glass 77 side. Even if the light beam is incident toward the end of the opening 72a, such as the light beam L1, the opening wall 721 is formed substantially perpendicular to the incident surface 76a of the incident dust-proof glass 76. It can be said that the light beam incident on the opening 72a is substantially not in contact with the wall 721 and is parallel to the wall 721. The opening wall 721 corresponds to the inner wall surface of the mounting case that forms the opening.

  Like the light beam L <b> 2 or the light beam L <b> 3, the light beam deviated from the opening 72 a strikes the inclined surface 722 of the case cover 72. Since the inclined surface 722 is inclined with respect to the surface of the image display region 42a in a state where the opening 72a bulges in the incident direction of the light beam, the light beam L2 or the light beam L3 hitting the inclined surface 722 is inclined surface 722. The reflected light beam L21 and the reflected light beam L31 reflected by are reflected toward the opposite side of the opening 72a with respect to the light beam L2 or the light beam L3. The inclined surface 722 corresponds to a slope.

  As shown in FIG. 5B, the opening wall 721 is formed substantially perpendicular to the incident surface 76a of the incident dust-proof glass 76 even if the light beam is incident toward the end of the opening 72a as in the case of the light beam L4. Therefore, the axial direction of the light beam and the opening wall 721 are parallel to each other, and it can be said that the light beam incident on the opening 72 a does not substantially hit the opening wall 721.

  Like the light beam L5 or the light beam L6, the light beam deviated from the opening 72a strikes the inclined surface 723 of the case cover 72. Since the inclined surface 723 is inclined with respect to the surface of the image display area 42a in a state where the opening 72a bulges in the incident direction of the light beam, the light beam L5 or the light beam L6 hitting the inclined surface 723 is inclined surface 723. The reflected light beam L51 and the reflected light beam L61 reflected by the light beam are reflected toward the side opposite to the opening 72a with respect to the light beam L5 or the light beam L6. The inclined surface 723 corresponds to a slope.

<Other liquid crystal light modulators>
Next, the configuration of the liquid crystal light modulation device 81 having a configuration different from that of the liquid crystal light modulation device 41 described above will be described with reference to FIG. FIG. 6 is an explanatory diagram showing the cross-sectional shape of the liquid crystal light modulation device and the states of the incident light beam and the reflected light beam. FIG. 6A is an explanatory diagram showing the cross-sectional shape of the liquid crystal light modulation device and the states of the incident light beam and the reflected light beam in the same cross section as indicated by AA in FIG. 4, and FIG. FIG. 7 is an explanatory diagram showing a cross-sectional shape of the liquid crystal light modulation device and a state of an incident light beam and a reflected light beam in a cross section substantially orthogonal to the cross section shown in FIG.

As shown in FIG. 6, the liquid crystal light modulation device 81 includes the liquid crystal modulation panel 42 described above, a mounting case 83, and the FPC 45 described above.
The mounting case 83 includes the case plate 71, the case cover 82, the slope frame 84, and the case stopper 73 described above.

The case cover 82 has a shape in which four corners, which are positions corresponding to the mounting holes 71 h, of the housing having a recess for accommodating the liquid crystal modulation panel 42 in cooperation with the case plate 71 are cut out. The case cover 82 has a frame region 82b that supports the peripheral region of the image display region 42a of the liquid crystal modulation panel 42 (the incident surface 76a of the incident dust-proof glass 76). An opening 82a having a size corresponding to the image display area 42a of the liquid crystal modulation panel 42 is formed in the frame area 82b. In the case cover 82, a side wall 82c, two side walls 82d, and a side wall 82e are formed at a position surrounding the frame region 82b. On the side surfaces (outer surfaces) of the two side walls 82d, hook portions 82f protruding in a substantially triangular prism shape are provided.
The opening 82a is an end surface that forms the frame region 82b, and is formed of four opening walls 821 that are substantially perpendicular to the surface of the image display region 42a.

  The slope frame 84 is disposed on the surface of the case cover 82 that faces the incident-side polarizing plate 46. In the slope frame 84, an opening 84a having substantially the same shape as the opening 82a is formed in a direction parallel to the surface of the image display area 42a. The slope frame 84 has a substantially square outer shape, and an opening 84a is opened at the center. That is, the slope frame 84 has a frame shape in which a square opening is formed at the center of the square.

The opening 84a is formed by four opening walls 841 substantially perpendicular to the surface of the image display area 42a. Each of the four opening walls 841 is located at the same position in the direction parallel to the respective opening walls 821 and the surface of the image display area 42a, and the opening walls 841 and the opening walls 821 are in the image display area 42a. It overlaps in a direction substantially perpendicular to the surface.
Of the surface of the sloped frame 84 having a frame shape and facing the incident-side polarizing plate 46, the surface of the portion substantially overlapping the frame region 82b and the side wall 82d is referred to as an inclined surface 822, and the frame region The surface of the portion that substantially overlaps 82b and the side wall 82c or the side wall 82e is referred to as an inclined surface 823. The inclined surface 822 and the inclined surface 823 are surfaces that are inclined with respect to the surface of the image display region 42a, and a state in which the side connected to the opening wall 841 bulges toward the incident-side polarizing plate 46 with respect to the outer peripheral side. It is inclined at.

  It is preferable that the inclined surface 822 and the inclined surface 823 be smooth surfaces in order to easily reflect the light flux. More preferably, it is preferably a mirror surface. The material of the slope frame 84 is not particularly limited as long as it is a material that can form the slope frame 84, but in order to make the inclined surface 822 and the inclined surface 823 smooth or mirror surfaces, a metal material is used. It is preferable to use it.

  Similar to the liquid crystal light modulation device 41 described above, the light beam incident on the liquid crystal light modulation device 81 is transmitted through the incident-side polarizing plate 46 and is incident substantially perpendicular to the surface of the image display region 42 a of the liquid crystal modulation panel 42. To do. An incident dustproof glass 76 is disposed on the side of the liquid crystal modulation panel 42 on which the light flux is incident, and the light flux enters the incident surface 76a of the incident dustproof glass 76 substantially perpendicularly.

As shown in FIG. 6A, the light beam incident on the opening 84a of the slope frame 84 is incident substantially perpendicularly to the incident surface 76a (the surface of the image display area 42a of the liquid crystal modulation panel 42) as the light beam L7. Then, the light is modulated by the liquid crystal modulation panel 42 and emitted from the emission dust-proof glass 77 side. Even if the light beam is incident toward the end of the opening 84a as in the light beam L7, the opening wall 841 is formed substantially perpendicular to the incident surface 76a of the incident dust-proof glass 76. It can be said that the light beam that is parallel to the wall 841 and incident on the opening 84a does not substantially hit the opening wall 841.
Even when the light beam that has passed through the opening portion 84a passes through the opening portion 82a, the opening wall 821 is formed substantially perpendicular to the incident surface 76a of the incident dust-proof glass 76, so that the axial direction of the light beam and the opening wall 821 are parallel. Thus, it can be said that the light beam incident on the opening 82 a does not substantially hit the opening wall 821.

  Like the light beam L8 or the light beam L9, the light beam deviated from the opening 84a strikes the inclined surface 822 of the inclined frame 84. Since the inclined surface 822 is inclined with respect to the surface of the image display area 42a in a state where the opening 84a bulges in the incident direction of the light beam, the light beam L8 or the light beam L9 hitting the inclined surface 822 is inclined surface 822. The reflected light beam L81 and the reflected light beam L91 reflected by the light beam are reflected toward the side opposite to the opening 84a with respect to the light beam L8 or the light beam L9.

As shown in FIG. 6B, the opening wall 841 is formed substantially perpendicular to the incident surface 76a of the incident dust-proof glass 76 even if the light beam is incident toward the end of the opening 84a as in the light beam L10. Therefore, the axial direction of the light beam and the opening wall 841 are parallel to each other, and it can be said that the light beam incident on the opening 84a does not substantially hit the opening wall 841.
Even when the light beam that has passed through the opening portion 84a passes through the opening portion 82a, the opening wall 821 is formed substantially perpendicular to the incident surface 76a of the incident dust-proof glass 76, so that the axial direction of the light beam and the opening wall 821 are parallel. Thus, it can be said that the light beam incident on the opening 82 a does not substantially hit the opening wall 821.

  Like the light beam L20 or the light beam L30, the light beam deviated from the opening 84a strikes the inclined surface 823 of the inclined frame 84. Since the inclined surface 823 is inclined with respect to the surface of the image display region 42a in a state where the opening 84a bulges in the incident direction of the light beam, the light beam L20 or the light beam L30 hitting the inclined surface 823 is inclined surface 823. The reflected light beam L22 and the reflected light beam L32 reflected by are reflected toward the opposite side of the opening 84a with respect to the light beam L20 or the light beam L30.

<Other optical modulators>
Next, the configuration of the optical modulation device 90 having a configuration different from that of the optical modulation device 16 will be described with reference to FIG. The optical modulation device 90 includes a liquid crystal light modulation device 91 having a configuration different from that of the liquid crystal light modulation device 41 and an incident side polarizing plate 96 different from the incident side polarizing plate 46. Is different. The cross dichroic prism 48 and the like are common to the optical modulation device 16.
FIG. 7 is an explanatory diagram showing the cross-sectional shapes of the liquid crystal light modulation device and the incident-side polarizing plate, and the states of the incident light beam and the reflected light beam. FIG. 7A is an explanatory diagram showing the cross-sectional shape of the liquid crystal light modulation device and the incident-side polarizing plate and the states of the incident light beam and the reflected light beam in the same cross section as indicated by AA in FIG. FIG. 7B is an explanatory diagram showing the cross-sectional shapes of the liquid crystal light modulation device and the incident-side polarizing plate and the states of the incident light beam and the reflected light beam in a cross section substantially orthogonal to the cross section shown in FIG.

As shown in FIG. 7, the liquid crystal light modulation device 91 includes the liquid crystal modulation panel 42 described above, a mounting case 93, and the FPC 45 described above.
The mounting case 93 includes the case plate 71, the case cover 92, and the case stopper 73 described above.

The case cover 92 has basically the same shape as the case cover 72 described above, and an inclination angle of the inclined surface 922 or the inclined surface 923 corresponding to the inclined surface 722 or the inclined surface 723 with respect to the surface of the image display region 42a. Is different from the case cover 72.
The opening 92a is formed of four opening walls 921 substantially perpendicular to the surface of the image display area 42a.

The incident side polarizing plate 96 has a configuration in which an inclined surface protrusion 97 is further formed on the incident side polarizing plate 46. The inclined surface protrusion 97 is formed on the surface of the incident side polarizing plate 96 facing the liquid crystal light modulation device 91. The inclined surface protrusion 97 has an opening 97a that is substantially similar to the opening 92a in a direction parallel to the surface of the image display region 42a and is larger than the opening 92a. The opening 97a is formed by four opening walls 971 that are substantially perpendicular to the surface of the image display area 42a.
A surface of the inclined surface protrusion 97 that faces the inclined surface 922 is expressed as an inclined surface 962, and a surface that faces the inclined surface 923 is expressed as an inclined surface 963. The inclined surface 962 and the inclined surface 963 are inclined with respect to the surface of the image display region 42a, and the state where the side connected to the opening wall 971 bulges toward the liquid crystal light modulator 91 with respect to the outer peripheral side. It is inclined at.
The inclined surface 962 and the inclined surface 963 are preferably smooth surfaces so that light can be easily reflected. More preferably, it is preferably a mirror surface. The material constituting the inclined surface protrusion 97 is not particularly limited as long as it is a material that can form the inclined surface protrusion 97, but in order to make the inclined surface 962 and the inclined surface 963 smooth or mirror surfaces, It is preferable to use a metal material.

  Similar to the liquid crystal light modulation device 41 described above, the light beam incident on the liquid crystal light modulation device 91 is transmitted through the incident side polarizing plate 96 and is incident substantially perpendicular to the surface of the image display region 42 a of the liquid crystal modulation panel 42. To do. An incident dustproof glass 76 is disposed on the side of the liquid crystal modulation panel 42 on which the light flux is incident, and the light flux enters the incident surface 76a of the incident dustproof glass 76 substantially perpendicularly.

  As shown in FIG. 7A, the light beam deviated from the opening 92a, such as the light beam L40 or the light beam L50, hits the inclined surface 922. The inclined surface 922 is slightly inclined with respect to the surface of the image display region 42a in a state where the opening 92a side slightly bulges in the incident direction of the light beam, and thus the light beam L40 or the light beam L50 that hits the inclined surface 922. The reflected light beam L44 and the reflected light beam L54 reflected by the inclined surface 922 are reflected toward the opposite side of the opening 92a with respect to the light beam L40 or the light beam L50.

  Since the inclination of the inclined surface 922 with respect to the surface of the image display area 42a is small, the reflected light beam L44 and the reflected light beam L54 strike the inclined surface 962. The inclined surface 962 is inclined with respect to the surface of the image display region 42a in a state where the side connected to the opening wall 971 bulges toward the liquid crystal light modulation device 91. Therefore, the reflected light beam L45 or the reflected light beam L55 reflected by the inclined surface 962 of the reflected light beam L44 or the reflected light beam L54 that hits the inclined surface 962 is opposite to the reflected light beam L44 or the reflected light beam L54 from the opening 97a. Reflected towards.

  As shown in FIG. 7B, the light beam deviated from the opening 92a, such as the light beam L60 or the light beam L70, hits the inclined surface 923. The inclined surface 923 is slightly inclined with respect to the surface of the image display area 42a in a state where the opening 92a side slightly bulges in the incident direction of the light beam, and thus the light beam L60 or the light beam L70 that hits the inclined surface 923. The reflected light beam L64 and the reflected light beam L74 reflected by the inclined surface 923 are reflected toward the opposite side of the opening 92a with respect to the light beam L60 or the light beam L70.

  Since the inclination of the inclined surface 923 with respect to the surface of the image display region 42a is small, the reflected light beam L64 and the reflected light beam L74 strike the inclined surface 963. The inclined surface 963 is inclined with respect to the surface of the image display region 42a in a state where the side connected to the opening wall 971 bulges toward the liquid crystal light modulation device 91. For this reason, the reflected light beam L65 and the reflected light beam L75 in which the reflected light beam L64 or the reflected light beam L74 hitting the inclined surface 963 is reflected by the inclined surface 963 are opposite to the opening 97a with respect to the reflected light beam L64 or the reflected light beam L74. Reflected towards. The inclined surface 962 and the inclined surface 963 correspond to the second inclined surface.

Hereinafter, effects of the embodiment will be described. According to the present embodiment, the following effects can be obtained.
(1) Since the opening wall 721 is formed substantially perpendicular to the incident surface 76a of the incident dust-proof glass 76, the axial direction of the light beam and the opening wall 721 are parallel, and the light beam incident on the opening 72a is the opening wall. There is virtually no hitting 721. For this reason, it is possible to suppress the temperature of the mounting case 43 from rising due to the light beam hitting the opening wall 721 and the energy of the light beam. Further, it is possible to almost eliminate the reflected light beam that is reflected when the light beam hits the opening wall 721 and enters the liquid crystal modulation panel.

  (2) Like the light beam L2, the light beam deviated from the opening 72a hits the inclined surface 722 of the case cover 72. Since the inclined surface 722 is inclined with respect to the surface of the image display area 42a in a state where the opening 72a bulges in the incident direction of the light beam, the reflected light beam L21 in which the light beam L2 is reflected by the inclined surface 722 is The light beam L2 is reflected toward the side opposite to the opening 72a. Thereby, it is possible to suppress the temperature of the mounting case 43 from rising due to the light flux L2 and the like being absorbed by the mounting case 43.

  (3) Like the reflected light beam L21, the possibility that the light beam reflected toward the side opposite to the opening 72a is incident on at least a portion of the incident-side polarizing plate 46 that is used as an optical element is substantially increased. Therefore, the possibility that the function of the incident side polarizing plate 46 is affected by the reflected light beam hitting the outgoing side of the incident side polarizing plate 46 can be almost eliminated.

  (4) Like the reflected light beam L21, the light beam reflected toward the side opposite to the opening 72a has substantially no possibility of entering the image display region 42a of the liquid crystal modulation panel 42. By entering the image display area 42 a of the liquid crystal modulation panel 42, the possibility of affecting the function of the liquid crystal modulation panel 42 can be almost eliminated.

  (5) Since the incident side polarizing plate 96 has the inclined surface 962 and the inclined surface 963, the reflected light beam L 44 and the reflected light beam L 64 reflected by the inclined surface 922, the inclined surface 923, etc. enter the incident side polarizing plate 96. This can be suppressed.

  As mentioned above, although preferred embodiment was described referring an accompanying drawing, suitable embodiment is not restricted to the said embodiment. The embodiment can of course be modified in various ways without departing from the scope, and can also be implemented as follows.

  (Modification 1) In the above embodiment, the inclined surface such as the inclined surface 722 is a flat surface, but it is not essential that the inclined surface is a flat surface. A curved surface or the like may be used as long as the reflected light beam can be reflected in the direction opposite to the opening.

  (Modification 2) In the above-described embodiment, the inclined surface such as the inclined surface 722 is one continuous surface, but it is not essential that the inclined surface is a continuous surface. A surface formed by combining a plurality of surfaces may be used as long as the reflected light beam can be reflected in the direction opposite to the opening.

  (Modification 3) In the above-described embodiment, the inclined surface 822 and the inclined surface frame 84 having the inclined surface 823 are fixed to the case cover 82, but the member having the inclined surface is formed integrally with the mounting case. Not required. The slope may be arranged separately from the mounting case.

  (Modification 4) In the embodiment, the inclined surface protrusion 97 having the inclined surface 962 and the inclined surface 963 is formed integrally with the incident-side polarizing plate 96, but the inclined surface 962 as the second inclined surface and It is not essential that the inclined surface 963 is formed integrally with the incident side polarizing plate 96 as an optical element. The second inclined surface may be disposed separately from the optical element provided on the side where the light beam enters the electro-optical element.

  (Modification 5) In the above-described embodiment, the liquid crystal light modulation device 41 including the liquid crystal modulation panel 42 as an example of an electro-optical element has been described as an example of an electro-optical device. However, a mounting case as described above is used. An electro-optical device that produces an effect is not limited to a liquid crystal device. Examples of electro-optical devices other than liquid crystal devices include organic electro-luminescence (Organic Electro-Luminescence) devices and digital mirror device (Digital Mirror Device) devices.

  (Modification 6) In the embodiment described above, the inclined surface 722, the inclined surface 723, or the inclined surface 724 is provided on the entire circumference around the opening 72a. However, it is possible to form a slope on the entire circumference of the opening. Not required. There may be a portion that does not form a slope around the opening.

The schematic diagram which shows schematic structure of a projection type display apparatus. (A) is the top view seen from the counter substrate side with each component about the liquid crystal modulation panel. (B) is a schematic sectional drawing which shows the cross-sectional shape in the cross section shown by HH in (a). The disassembled perspective view which shows the main elements which comprise a liquid crystal light modulation apparatus. The external appearance perspective view which shows schematic shape of a liquid crystal light modulation apparatus. Explanatory drawing which shows the cross-sectional shape of a liquid-crystal light modulation apparatus, and the state of an incident light beam and a reflected light beam. Explanatory drawing which shows the cross-sectional shape of a liquid-crystal light modulation apparatus, and the state of an incident light beam and a reflected light beam. Explanatory drawing which shows the cross-sectional shape of a liquid crystal light modulation apparatus and an incident side polarizing plate, and the state of an incident light beam and a reflected light beam.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Projection type display apparatus, 11 ... Light source apparatus, 12 ... Color separation optical apparatus, 14 ... Relay optical apparatus, 16 ... Optical modulation apparatus, 17 ... Projection optical apparatus, 41 ... Liquid crystal light modulation apparatus, 42 ... Liquid crystal modulation panel, 42a ... image display area, 43 ... mounting case, 46 ... incident side polarizing plate, 47 ... outgoing side polarizing plate, 48 ... cross dichroic prism, 72 ... case cover, 72a ... opening, 84 ... slope frame, 84a ... opening 96 ... Incident side polarizing plate, 97 ... Inclined surface protrusion, 97a ... Opening, 721 ... Opening wall, 722, 723, 724 ... Inclining surface, 821 ... Opening wall, 822, 823 ... Inclining surface, 841 ... Opening wall, 962,963 ... inclined surface, 971 ... opening wall.

Claims (12)

An electro-optical device comprising: an electro-optical element; and a mounting case for housing the electro-optical element,
The mounting case includes an opening provided corresponding to a pixel region of the electro-optic element;
Formed around the opening, and includes a slope inclined with respect to one surface of the electro-optic element,
An electro-optical device, wherein an inner wall surface of the mounting case that defines the opening is formed substantially perpendicular to the one surface of the electro-optical element.   The inclined surface is reflected in a direction in which a reflected light beam that is incident on the one surface substantially perpendicularly and is reflected by the inclined surface is reflected in a direction that avoids crossing with a light beam that can be incident substantially perpendicularly on the one surface. The electro-optical device according to claim 1, wherein the electro-optical device is inclined.   The electro-optical device according to claim 1, wherein the mounting case and the slope are made of a metal material.   4. The electro-optical device according to claim 1, wherein the inclined surface is mirror-finished. 5.   An optical element provided on a side where a light beam is incident on the electro-optical element is further provided, and the inclined surface is disposed between the optical element and the electro-optical element. Item 5. The electro-optical device according to any one of Items 1 to 4.   The electro-optical device according to claim 1, wherein the inclined surface is formed in the mounting case.   Provided between the inclined surface and the optical element, and in a direction to avoid the reflected light beam reflected by the inclined surface from intersecting with the light beam that can be incident substantially perpendicular to the one surface from the reflected light beam. The electro-optical device according to claim 5, further comprising a second inclined surface formed so as to be inclined in a direction in which the light is reflected. A mounting case for accommodating an electro-optic element,
An opening provided corresponding to a pixel region of the electro-optic element;
Formed around the opening, and an inclined surface inclined with respect to one surface of the electro-optic element,
An inner wall surface forming the opening is formed substantially perpendicularly to the one surface of the electro-optic element accommodated in the mounting case.   The inclined surface is reflected in a direction in which a reflected light beam that is incident on the one surface substantially perpendicularly and is reflected by the inclined surface is reflected in a direction that avoids crossing with a light beam that can be incident substantially perpendicularly on the one surface. The mounting case according to claim 8, wherein the mounting case is inclined.   The mounting case according to claim 8 or 9, wherein a portion forming the slope is made of a metal material.   The mounting case according to claim 8, wherein the inclined surface is mirror-finished.   An electronic apparatus comprising the electro-optical device according to claim 1.

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