JP2005266828A - Electro-optical device held in mounting case, projection-type display device and mounting case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display a higher-quality image by firmly attaching an electro-optical device held in a mounting case to a projection-type display device, and preventing such an attachment from influencing the electro-optical device. <P>SOLUTION: The mounting case is constituted of a plate arranged facing one surface of the electro-optical device and a cover, having a part covering the electro-optical device and abutting against the plate. The cover is equipped with a window part for making light from a light source incident on the electro-optical device, a tapered part for guiding cooling air toward the window part and an attaching part which is attached to the part to be attached of the projection-type display device at the tapered part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mounting case for mounting an electro-optical device such as a liquid crystal panel used as a light valve on a projection display device such as a liquid crystal projector, and a mounting formed by mounting or accommodating the electro-optical device in the mounting case The present invention belongs to a technical field of a cased electro-optical device and a projection display device including such a mounting case-containing electro-optical device.

  In general, when a liquid crystal panel is used as a light valve in a liquid crystal projector, the liquid crystal panel is not installed in a so-called bare state in a casing constituting the liquid crystal projector, but the liquid crystal panel is mounted in an appropriate mounting case. In addition, the housing-cased liquid crystal panel is installed in the housing or the like after being accommodated. This is because it is possible to easily fix the liquid crystal panel to the housing or the like by providing an appropriate screw hole or the like in the mounting case.

  In such a liquid crystal projector, the light source light emitted from the light source is projected in a focused state on the liquid crystal panel with the mounting case. And the light which permeate | transmitted the liquid crystal panel is enlarged and projected on a screen, and an image is displayed. As described above, since enlargement projection is generally scheduled in a liquid crystal projector, relatively strong light emitted from a light source such as a metal halide lamp is used as the light source light.

  Then, first, the temperature rise of the liquid crystal panel with a mounting case, especially the liquid crystal panel becomes a problem. That is, when such a temperature rise occurs, the temperature of the liquid crystal sandwiched between the pair of transparent substrates in the liquid crystal panel also rises, leading to deterioration of the characteristics of the liquid crystal. In particular, when the light source has unevenness, the liquid crystal panel is partially heated to generate a so-called hot spot, causing unevenness in the transmittance of the liquid crystal and degrading the image quality of the projected image. As a technique for preventing such a temperature rise of the liquid crystal panel, for example, a technique disclosed in Patent Document 1 is known.

International Publication Number WO98 / 36313

  However, the conventional liquid crystal panel with a mounting case has the following problems. That is, in order to display an image with a liquid crystal projector, as described above, it is necessary to accurately project a light collected from a light source on a liquid crystal panel with a mounting case in the liquid crystal projector. . In order to do this, first, the liquid crystal panel with the mounting case must be accurately attached to the liquid crystal projector. Secondly, such an accurate mounting must always be maintained within a certain range during the use period of the liquid crystal projector (that is, the “deviation” of the mounting position during the use period is constant). Must be within the range of.) In satisfying this requirement, the temperature of the liquid crystal panel or the mounting case rises due to the projection of relatively strong light on the liquid crystal panel with the mounting case, and the thermal expansion due to this is taken into consideration. There is a need.

  The present invention has been made in view of the above problems, and can firmly mount the electro-optical device with a mounting case on the projection type display device, so that it does not affect the electro-optical device. Accordingly, it is an object to provide an electro-optical device with a mounting case capable of displaying a higher quality image and a projection display device including the same. Another object of the present invention is to provide a mounting case suitable for use in such an electro-optical device with a mounting case.

In order to solve the above problems, an electro-optical device with a mounting case according to the present invention has an electro-optical device in which light is incident from a light source on an image display region, and a plate disposed to face one surface of the electro-optical device, And a cover that covers the electro-optical device and has a portion that comes into contact with the plate, and at least a part of a peripheral region located around the image display region in the electro-optical device is at least one of the plate and the cover. A mounting case-containing electro-optical device having a mounting case for holding and accommodating the electro-optical device, wherein the cover includes a window for allowing light from the light source to enter the electro-optical device, and cooling A taper portion for guiding the wind toward the window portion; and an attachment portion for attaching the wind portion to the attachment portion of the projection display device. That.

  And in this invention, the said plate has an attaching part for attaching with respect to the to-be-attached part of the said projection type display apparatus.

  Further, the present invention is characterized in that the mounting portion on the plate side coincides with the mounting portion on the cover side.

  The electro-optical device with a mounting case according to the present invention includes an element substrate, and a counter substrate disposed so as to face the element substrate and the outer shape of the element substrate does not match the outer shape of the element substrate. An electro-optical device in which projection light is incident from a light source on an image display region defined as at least a part of a surface where the element substrate and the counter substrate face each other, and disposed so as to face one surface of the electro-optical device And a cover that covers the electro-optical device and has a portion that comes into contact with the plate, and at least a part of a peripheral region located around the image display region in the electro-optical device is the plate and the cover. A mounting case-containing electro-optical device comprising a mounting case that holds at least one of the electro-optical device and includes the plate and At least one of the covers includes an attachment portion for attaching the electro-optical device with the mounting case to the attachment portion of the projection display device, and the attachment portion is seen from the center of the image display area, etc. At least two of the mounting portions are formed at a distance.

  According to the electro-optical device of the present invention, the electro-optical device in which the projection light is incident on the image display area is mounted in the mounting case including the cover and the plate. Examples of such an electro-optical device include a liquid crystal device or a liquid crystal panel mounted as a light valve in a projection display device. Note that, in such a mounting case, at least partially covering the peripheral area of the electro-optical device prevents light leakage in the peripheral area or prevents stray light from entering the image display area from the peripheral area. You may give the light-shielding function to prevent.

  In the present invention, in particular, at least one of the plate and the cover (represented by “plate” in the following description) attaches the mounting case-containing electro-optical device to the attachment portion of the projection display device. For this purpose, a mounting portion is provided. With this attachment portion, the mounting case-encased electro-optical device can be reliably attached to the projection display device. In addition, as said to-be-attached part, the housing | casing etc. which were comprised as a part of projection type display apparatus, for example, and were provided with the appropriate three-dimensional shape can be mentioned. Moreover, various things can be taken as a specific aspect of an attaching part. For example, the mounting portion can be configured as a screw hole. In this case, a screw is provided so as to penetrate and screw into the mounting portion that is the screw hole and the female screw hole formed in the mounted portion. By stopping, mounting between the electro-optical device with a mounting case and the projection display device can be realized.

  Further, in the present invention, there are at least two attachment portions at equidistant positions when viewed from the center of the image display area. The “image display area” here has the following significance in the present invention. That is, first, the electro-optical device according to the present invention includes an element substrate and a counter substrate, and has a configuration in which the latter outer shape is arranged so as not to match the former outer shape. Here, the “arrangement so that the outer shape of the counter substrate does not match the outer shape of the element substrate” means that, for example, the outer shape of the element substrate and the outer shape of the counter substrate are originally different (specifically, for example, the former The outer shape of the element substrate and the counter substrate are the same when the two substrates face each other and their outer shapes do not match (hereinafter referred to as “configuration of the first example”), It is assumed that the former is displaced by a certain amount with respect to the latter (hereinafter referred to as “configuration of second example”). The configurations of the first and second examples include, for example, a region for providing a switching element formed on the element substrate, a drive circuit for driving a scanning line, a data line, and the like. Adopted as needed.

  The image display area according to the present invention is defined as at least a part of a surface where the two substrates face each other on the premise of the arrangement mode of the element substrate and the counter substrate as described above. For example, in the configuration of the first example, at least a part of the surface of the substrate having a smaller outer shape is defined as the image display area, and in the configuration of the second example, the portion of the other substrate that protrudes from one substrate. At least a part of the surface of the substrate except for is defined as an image display area.

  In the present invention, there are at least two attachment portions at equidistant positions as viewed from the center of the image display area having such significance. Therefore, first, for example, when a screwing type is adopted for joining between the attachment portion and the attachment portion, even if the force generated by fastening the screw acts on the electro-optical device, the force Does not affect the imbalance with respect to the image display area.

  Further, in the present invention, since both the substrates are arranged so that the outer shape of the counter substrate does not coincide with the outer shape of the element substrate, the formation position of the mounting hole is “deviation” due to the arrangement of the element substrate and the counter substrate. ”Will be determined.

  In this regard, for the purpose of downsizing the electro-optical device with a mounting case, for example, in the configuration of the first example, for example, the mounting portion is arranged along the periphery of the substrate whose outer shape is larger (or The mounting portion is arranged in accordance with the maximum outer shape of the electro-optical device). However, in this case, if the two substrates are arranged so that the edges of the large and small substrates substantially coincide with each other, the mounting position of the mounting portion becomes unbalanced when viewed from the image display area. Therefore, when the force generated at the attachment portion and the attachment portion acts on the electro-optical device, the force acts on the image display area in an unbalanced manner, thereby causing color unevenness on the image. (For example, when the force acts only on a part of the image display area and does not act on other parts, the cell gap in the part is narrowed. In this part, it was supposed to be normal, etc., and uneven color was observed between these parts and other parts.)

  However, in the present invention, as described above, the determination of the attachment position formation position is performed based on the image display area, so that the above-described problems do not occur. For example, the mounting portion has a large outer shape even when the both substrates are arranged so that the edges of the large and small substrates substantially coincide with each other according to the configuration of the first example. It does not mean that it is arranged along the perimeter of. Because the image display area is defined as at least a part of the surface of the small substrate among the large and small substrates, the mounting portion is rather arranged with reference to a substrate whose outer shape is smaller. Because it will be. In this case, since the attachment portion tends to be disposed at a position farther from the image display area, the force generated between the attachment portion and the attachment portion is the electro-optical device or the image display area. The situation that affects the situation is prevented in advance.

  In the present invention, since there are at least two attachment portions, it is possible to more firmly join the mounting case and the projection display device.

  In one aspect of the mounting case-encased electro-optical device of the present invention, the image display area has a rectangular shape, and the attachment portion is formed at an equidistant position in the vertical direction or the horizontal direction as viewed from the center of the image display area. Has been.

  According to this aspect, when the image display area has a rectangular shape, the attachment portion can be more suitably arranged. In this aspect, when the attachment portion is formed at “equal distance in the vertical direction”, it is on a straight line parallel to the upper side or the lower side of the image display area including the equidistant point. A form in which a plurality of attachment portions exist is also included. The same applies to the “left-right direction”. In addition, the present invention includes an embodiment in which the mounting portion is “formed at equidistant positions in both the vertical direction and the horizontal direction”.

  In another aspect of the electro-optical device with a mounting case according to the present invention, the mounting portion is formed so as to be disposed at each vertex of the triangle in a plan view of at least one of the plate and the cover.

  According to this aspect, the plate can be suitably attached to the attached portion. In other words, if the three points are determined, the plane on which these three points are located is determined. However, if the mounting portion according to this aspect is used, the plate can be attached to the mounted portion by fixing the three points. The plate can be attached so that the surface rests on a predetermined preferred plane (hereinafter, such an operation may be referred to as “planarization”). Note that the “preferable plane” mentioned above is determined by, for example, the incident mode of the projection light with respect to the electro-optical device or the state of light collection. If the plate is installed as described above, the mounting case or the electro-optical device housed in the mounting case or the electro-optical device accommodated in the mounting case is also secured in the preferable plane and assembled in the projection display device. Will be.

  As described above, according to this aspect, the plate or the mounting case-containing electro-optical device can be suitably installed in the projection display device. Therefore, it is possible to display a higher quality image by realizing accurate irradiation of the projection light to the electro-optical device or accurate emission from the electro-optical device.

  If the mounting part that satisfies the requirements of this aspect is formed in a stepped part when viewed from other parts on the plate, the installation of the electro-optical device with a plate or a mounting case in the projection display device is more preferably performed. can do. This is because the attachment portion is formed on a flat surface protruding from the other portion. According to this, regardless of the flatness, the plate can be placed so as to be placed on a plane determined by the three protruding points. Figuratively speaking, it can be easily leveled like a tripod installed on a rocky place. The present invention also includes a plate having such a form within the scope thereof.

  In another aspect of the mounting case-encased electro-optical device according to the present invention, the mounting portion may be arranged at each vertex of the triangle in a plan view of at least one of the plate and the cover. It is formed so as to be arranged at each vertex of a quadrilateral including two points defining one side, and the mounting portion arranged at each vertex of the triangle is screwed, and is arranged at each vertex of the square. The mounting portion is an adhesive method.

  According to this aspect, typically, five mounting portions are conveniently formed. That is, in this aspect, first, since the attachment portion is formed so as to be arranged at each vertex of the triangle, there are three attachment portions. In addition to this, since the attachment portion according to this aspect is formed so as to be arranged at each vertex of the quadrangle, there are four attachment portions. Here, since the quadrangle is formed so as to be arranged at each vertex of the quadrilateral including two points defining one side of the triangle, two of the three attachment parts and the four attachment parts are attached. The department is common. Therefore, five attachment parts according to this aspect are formed for convenience.

  In this embodiment, the three attachment portions are screwed, and the four attachment portions are adhesive. Here, the term “adhesion method” refers to a type in which an adhesive is interposed between the attachment portion and the attachment portion so that the two can be joined (more specifically, the “attachment portion” described later is “ (Refer to the form including the “mounting hole”.) Note that the two common mounting portions described above correspond to both the screwing method and the bonding method.

  As described above, in the mounting case according to this aspect, it is possible to realize the bonding between the mounting portion and the mounted portion with any of the two bonding methods, and thus the specific of the mounted portion can be realized. Regardless of the mode, mounting of the electro-optical device with a mounting case to the projection display device can be performed.

  In addition, this invention is not specifically limited about the number of attachment parts. For example, you may employ | adopt the form that four or less or six or more attachment parts exist.

  In this aspect, the electro-optical device further includes a flexible connector electrically connected to the element substrate, and two points defining one side of the triangle are electrically connected to the element substrate. It may be provided so as to correspond to the formed part.

  According to such a configuration, two points that define one side of the triangle among the five attachment portions are provided corresponding to portions where the flexible connector is electrically connected to the element substrate. The remaining one point of each vertex of the triangle is provided at a portion where the flexible connector is not connected. Therefore, according to this configuration, it is possible to suitably realize the lead-out of the flexible connector from the mounting case without the remaining one point (attachment portion) being in the way.

  In another aspect of the electro-optical device with a mounting case of the present invention, the mounting portion includes a mounting hole, and includes a cylindrical portion whose axis coincides with a line passing through the center of the mounting hole.

  According to this aspect, the attachment between the plate and the attached portion can be more suitably performed through the cylindrical portion. For example, if a screw is cut on the inner peripheral surface of the cylindrical portion, the plate and the attached portion can be easily and suitably screwed. Further, even if a screw is not cut on the inner peripheral surface of the cylindrical portion, a stud or a wedge is driven into the cylindrical portion, and an appropriate adhesion is provided between the stud or wedge and the inner peripheral surface of the cylindrical portion. By pouring the agent, the attachment between the plate and the attached portion can be easily and suitably performed.

  In another aspect of the electro-optical device with a mounting case of the present invention, the formation position of the attachment portion is determined based on a stress distribution that spreads around the attachment portion.

  According to this aspect, for example, when the attachment portion and the attachment portion are screwed, the formation position of the attachment portion on the plate is a stress distribution caused by fastening that spreads around the screw. Determined based on. According to this, for example, a region having a relatively large stress caused by screw fastening is avoided from being applied to the element substrate or the counter substrate constituting the electro-optical device, or from being applied to the image display region. The formation position of the attachment portion can be determined. Therefore, by avoiding the stress from acting on the electro-optical device, it is possible to avoid a situation where the quality of the image is given up.

  In order to solve the above problems, the projection display device of the present invention includes the above-described electro-optical device with a mounting case of the present invention (including various aspects thereof), the attached portion, the light source, and the An optical system that guides the projection light to the electro-optical device; and a projection optical system that projects the projection light emitted from the electro-optical device.

  According to the projection type display device of the present invention, since the electro-optical device with the mounting case of the present invention is provided, the assembly of the electro-optical device with the mounting case into the projection type display device can be accurately performed. In addition, even when the force between the attachment portion and the attachment portion acts on the electro-optical device, it does not become unbalanced with respect to the image display region, so that the image quality such as color unevenness is deteriorated. There is nothing to bring about. Therefore, according to the projection display device of the present invention, it is possible to display a higher quality image.

  In order to solve the above problems, the mounting case of the present invention comprises an element substrate and a counter substrate disposed so as to face the element substrate and its outer shape does not coincide with the outer shape of the element substrate. A plate disposed to face one surface of an electro-optical device in which projection light is incident from a light source on an image display region defined as at least a part of a surface where the element substrate and the counter substrate face each other. And a cover that covers the electro-optical device and has a portion that comes into contact with the plate, and at least a part of a peripheral region located around the image display region in the electro-optical device is at least one of the plate and the cover. A mounting case for holding and accommodating the electro-optical device, wherein at least one of the plate and the cover is in the mounting case A mounting portion for mounting the air-optical device to a mounted portion of the projection display device, the mounting portion being formed at an equidistant position when viewed from the center of the image display area; At least two are formed.

  According to the mounting case of the present invention, it is possible to provide a mounting case suitable for use in the above-described electro-optical device with a mounting case of the present invention.

  In one aspect of the mounting case-encased electro-optical device of the present invention, the image display area has a rectangular shape, and the attachment portion is formed at an equidistant position in the vertical direction or the horizontal direction as viewed from the center of the image display area. Has been.

  According to this aspect, when the image display area has a rectangular shape, the attachment portion can be more suitably arranged. In this aspect, when the attachment portion is formed at “equal distance in the vertical direction”, it is on a straight line parallel to the upper side or the lower side of the image display area including the equidistant point. A form in which a plurality of attachment portions exist is also included. The same applies to the “left-right direction”. In addition, the present invention includes an embodiment in which the mounting portion is “formed at equidistant positions in both the vertical direction and the horizontal direction”.

  Such an operation and other advantages of the present invention will become apparent from the embodiments described below.

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

(Embodiment of Projection Type Liquid Crystal Device)
First, an embodiment of a projection type liquid crystal device according to the present invention will be described with reference to FIG. 1, focusing on an optical system incorporated in the optical unit. The projection type display device of this embodiment is constructed as a multi-plate color projector using three liquid crystal light valves as an example of an electro-optical device with a mounting case.

  In FIG. 1, a liquid crystal projector 1100, which is an example of a double-plate type color projector in the present embodiment, prepares three liquid crystal light valves including an electro-optical device having a drive circuit mounted on a TFT array substrate, each for RGB. The projector is configured as a light valve 100R, 100G, and 100B. 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, light components R, G, and R corresponding to the three primary colors of RGB are obtained by three mirrors 1106 and two dichroic mirrors 1108. B is divided into the light valves 100R, 100G and 100B corresponding to the respective colors. At this time, in particular, the B light is guided through a relay lens system 1121 including an incident lens 1122, a relay lens 1123, and an exit lens 1124 in order to prevent light loss due to a long optical path. The light components corresponding to the three primary colors modulated by the light valves 100R, 100G, and 100B are synthesized again by the dichroic prism 1112 and then projected as a color image on the screen 1120 via the projection lens 1114.

  As the light valves 100R, 100G, and 100B of the present embodiment, for example, an active matrix driving type liquid crystal device using TFTs as switching elements as described later is used. The light valves 100R, 100G, and 100B are configured as a mounting case-encased electro-optical device as will be described in detail later.

  Further, as shown in FIG. 1, the liquid crystal projector 1100 is provided with a sirocco fan 1300 for sending cooling air to the light valves 100R, 100G, and 100B. The sirocco fan 1300 includes a substantially cylindrical member having a plurality of blades 1301 on its side surface, and the cylindrical member rotates about its axis so that the blade 1301 generates wind. It has become. From such a principle, the wind generated by the sirocco fan 1300 is spirally spiraled as shown in FIG.

  Such wind is supplied to each light valve 100R, 100G, and 100B through an air passage (not shown in FIG. 1), and from the outlets 100RW, 100GW, and 100BW provided in the vicinity of each light valve 100R, 100G, and 100B, The light valves 100R, 100G, and 100B are sent out.

  Incidentally, if the sirocco fan 1300 as described above is used, there is an advantage that the static pressure is high and it is easy to send wind to the narrow spaces around the light valves 100R, 100G and 100B.

  In the configuration described above, the temperature rises in each of the light valves 100R, 100G, and 100B by the projection light from the lamp unit 1102 that is a powerful light source. At this time, if the temperature rises excessively, the liquid crystal constituting each of the light valves 100R, 100G, and 100B deteriorates or the transmittance is increased due to the appearance of hot spots due to partial heating of the liquid crystal panel due to unevenness of light source light. Unevenness may occur. Therefore, in the present embodiment, in particular, each of the light valves 100R, 100G, and 100B includes a mounting case that has the ability to cool the electro-optical device, as will be described later. For this reason, as will be described later, the temperature rise of each light valve 100R, 100G, 100B is efficiently suppressed.

  In the present embodiment, it is preferable that the housing of the liquid crystal projector 1100 is provided with a cooling unit including a circulation device for flowing a cooling medium in a space around each of the light valves 100R, 100G, and 100B. As a result, heat can be radiated from the electro-optical device containing the mounting case having a heat radiating action as described later more efficiently.

(Embodiment of electro-optical device)
Next, the overall configuration of the embodiment according to the electro-optical device of the invention will be described with reference to FIGS. Here, a TFT active matrix driving type liquid crystal device with a built-in driving circuit, which is an example of an electro-optical device, is taken as an example. The electro-optical device according to this embodiment is used as the liquid crystal light valves 100R, 100G, and 100B in the liquid crystal projector 1100 described above. 2 is a plan view of the electro-optical device when the TFT array substrate is viewed from the side of the counter substrate together with each component formed thereon, and FIG. 3 is a cross-sectional view taken along line HH ′ of FIG. It is.

  2 and 3, in the electro-optical device according to the present embodiment, the TFT array substrate 10 and the counter substrate 20 are disposed to face each other. 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, for example, an ultraviolet curable resin, a thermosetting resin, or the like for bonding the two substrates, and is applied on the TFT array substrate 10 in the manufacturing process and then cured by ultraviolet irradiation, heating, or the like. It is. Further, in the sealing material 52, a gap material such as glass fiber or glass beads for dispersing the distance (inter-substrate gap) between the TFT array substrate 10 and the counter substrate 20 to a predetermined value is dispersed. That is, the electro-optical device according to the present embodiment is suitable for a small and enlarged display for a projector light valve.

  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.

  In the area extending around the image display area, the data line driving circuit 101 and the external circuit connection terminal 102 are along one side of the TFT array substrate 10 in the area located outside the sealing area where the sealing material 52 is disposed. Is provided. 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 10a in this way, the TFT array substrate 10 is covered with the frame light shielding film 53 along the remaining side. A plurality of wirings 105 are provided.

  In addition, vertical conduction members 106 that function as vertical conduction terminals between the two substrates are disposed at the four corners of the counter substrate 20. On the other hand, the TFT array substrate 10 is provided with vertical conduction terminals in a region facing these corners. Thus, electrical conduction can be established between the TFT array substrate 10 and the counter substrate 20.

  In FIG. 3, on the TFT array substrate 10, an alignment film (not shown) is formed on the pixel electrode 9a after the pixel switching TFT, the scanning line, the data line and the like are formed. On the other hand, on the counter substrate 20, in addition to the counter electrode 21, a lattice-shaped or striped light-shielding film 23 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.

  2 and 3, on the TFT array substrate 10, in addition to the data line driving circuit 101 and the scanning line driving circuit 104, the image signal on the image signal line is sampled and supplied to the data line. Sampling circuit, precharge circuit for supplying a precharge signal of a predetermined voltage level to a plurality of data lines in advance of the image signal, for inspecting the quality, defects, etc. of the electro-optical device during production or at the time of shipment An inspection circuit or the like may be formed.

(First embodiment of electro-optical device with mounting case)
Next, with reference to FIGS. 4 to 7, a mounting case-encased electro-optical device according to the first embodiment of the invention will be described. 4 is an exploded perspective view showing the mounting case according to the first embodiment together with the electro-optical device described above, FIG. 5 is a front view of the electro-optical device with the mounting case, and FIG. 6 is a rear view thereof. FIG. 7 is a side view from the Q1 direction of FIG. 4 to 7 show the mounting cases in a state where the electro-optical panel is housed inside.

  As shown in FIGS. 4 to 7, the mounting case 801 includes a plate portion 810 and a cover portion 820. The electro-optical device 500 accommodated in the mounting case 801 includes the electro-optical device shown in FIGS. 2 and 3 and other optical elements such as an antireflection plate superimposed on the surface thereof, and further to the outside. A flexible connector 501 is connected to the circuit connection terminal. The polarizing plate and the retardation plate may be provided in the optical system of the projection display device, or may be stacked on the surface of the electro-optical device 500. A dustproof substrate 400 is provided on the side of the TFT array substrate 10 and the counter substrate 20 that do not face the liquid crystal layer 50 (see FIGS. 4 and 7). The dustproof substrate 400 has a predetermined thickness. As a result, dust, dust, etc. floating around the electro-optical device 500 are prevented from directly attaching to the surface of the electro-optical device. Therefore, it is possible to effectively solve the problem that the dust and dust images are formed on the enlarged projected image. This is because the dust-proof substrate 400 has a predetermined thickness, so that the focal point of the light source light or the vicinity thereof deviates from the position where the dust or dust is present (that is, the surface of the dust-proof substrate 400). Focus action).

  In the first embodiment, it is assumed that light enters from the cover portion 820 side, passes through the electro-optical device 500, and exits from the plate portion 810 side. In other words, in FIG. 1, it is not the cover portion 820 but the plate portion 810 that faces the dichroic prism 1112. However, on the contrary, a mode in which light enters from the plate portion 810 and exits from the cover portion 820 may be employed.

  The plate unit 810 has a plate-shaped main body having a planar shape facing the peripheral region in order to fix the peripheral region of the electro-optical device 500 placed in the internal space of the cover unit 820 from the back side. The plate portion 810 has a window portion 815 so as to expose the image display region 10a of the electro-optical device 500, and further has an engaging portion 817 having a small window for fixing the main body of the plate portion 810 to the cover portion 820. Has on both sides of the front. The cover portion 820 has protrusions 827 that engage with the small windows of the engagement portion 817 on both sides of the front surface. The plate portion 810 is preferably made of a highly elastic metal, resin, or the like so that the protrusion 827 and the engagement portion 817 can be engaged with each other. Further, since the plate portion 810 plays a role of fixing and maintaining the electro-optical device 500 and the cover portion 820, the plate portion 810 and at least a part of the electro-optical device 500 and the cover portion 820 include, for example, the above-described protrusions. Like the portion 827 and the engaging portion 817, the portions that inevitably come into contact with each other are provided. Accordingly, the plate unit 810 functions as a heat sink for absorbing heat generated by the electro-optical device 500. In the first embodiment, in particular, the plate portion 810 is brought into full contact with the electro-optical device 500 as shown in FIG. 7, for example.

  As described above, the electro-optical device 500 is accommodated in the internal space of the cover portion 820, and the plate portion 810 is fixed to the cover portion 820 by the engagement of the engaging portion 817 and the protruding portion 827, so that the mounting case 801.

  The cover unit 820 has a main body that defines an internal space in which the electro-optical device 500 is accommodated. This internal space is formed so as to have a shape that substantially matches the outer shape of the electro-optical device 500 (that is, in FIG. 7, the inner wall of the cover portion 820 is formed so as to trace the maximum outline of the broken line. ). As a result, the electro-optical device 500 is restrained from the cover portion 820. The cover portion 820 is preferably made of a light-shielding resin, metal, or the like so as to prevent light from leaking in the peripheral area of the electro-optical device 500 and to prevent stray light from entering the image display area 10a from the peripheral area. Become. Alternatively, the cover part 820 is preferably made of a material containing aluminum or magnesium having high thermal conductivity so as to improve the heat dissipation of the cover part 820 itself in order to function as a heat sink for the electro-optical device 500. Further, the cover unit 820 includes a window unit 825 opened in the main body so as to expose the image display region 10a of the electro-optical device 500.

  In particular, in the first embodiment, the cover portion 820 has mounting holes 821a, 821b, 821c, and 821d so that the mounting case-encased electro-optical device can be mounted in the projection display device as shown in FIG. It has.

  First, the mounting holes 821a to 821d are arranged at the vertices of a quadrangle on a plate-like member that constitutes the plate portion 810 and has a substantially quadrilateral shape in plan view, as shown in FIG. It is formed to be.

  The mounting holes 821a to 821d are formed at equidistant positions in the vertical direction and the horizontal direction when viewed from the center of the image display region 10a. More specifically, first, as described with reference to FIGS. 1 and 2, the image display region 10 a according to the first embodiment is on the surface where the TFT array substrate 10 and the counter substrate 20 face each other. It is defined as a part, that is, a region inside the frame light shielding film 53. Here, the outer shape of the TFT array substrate 10 and the counter substrate 20 is larger than the outer shape of the latter, and even if the substrates 10 and 20 face each other, their outer shapes do not match (FIG. 1 and FIG. 1). 2 and also FIG. 7). Therefore, as shown in FIG. 5 or FIG. 6, the center 500C of the electro-optical device 500 (the cross in the figure) when the TFT array substrate 10 and the counter substrate 20 are viewed as one unit is the center 10aC of the image display region 10a (the round mark in the figure). ) Will not match. In FIG. 5, the outermost edge of the electro-optical device 500 when the electro-optical device 500 is placed on the plate portion 810 is indicated by a broken line.

  In the first embodiment, mounting holes 821a to 821d are formed at equidistant positions in the vertical direction and the horizontal direction when viewed from the center 10aC of the image display region 10a. First, in the relationship between the mounting holes 821a and 821b and the mounting holes 821c and 821d, the former mounting holes 821a and 821b are arranged at a distance US in the upward direction in FIG. 5 when viewed from the center 10aC. The latter mounting holes 821c and 821d are similarly arranged at a distance DS in the downward direction of FIG. And, US = DS holds between these distances US and DS. On the other hand, in the relationship between the mounting holes 821a and 821c and the mounting holes 821b and 821d, the former mounting holes 821a and 821c are arranged at a distance LS in the left direction in FIG. 5 when viewed from the center 10aC. The latter mounting holes 821b and 821d are similarly arranged at a distance RS in the right direction in FIG. And LS = RS is established between these distances LS and RS. Thus, in the first embodiment, the attachment holes 821a to 821d are arranged at equal distances in the vertical direction and the horizontal direction as seen from the center 10aC of the image display region 10a.

  On the other hand, the mounting holes 821a to 821d are provided with cylindrical portions 821Ca, 821Cb, 821Cc and 821Cd, respectively, as shown in FIG. In the first embodiment, in particular, a threaded surface 701 (described later) corresponding to the cylindrical portions 821Ca to 821Cd is threaded, and the screw 87 can be screwed. As a result, the plate portion 810 and the mounted surface 701 can be screwed together.

  Furthermore, in the first embodiment, the positions where the mounting holes 821a to 821d are formed are determined based on the stress distribution spreading around the cylindrical portions 821Ca to 821Cd configured to be screwable as described above. Yes. More specifically, it is as follows.

  First, when the screws 87 are screwed into the mounting portions 821a to 821d and the plate portion 810 is screwed to the mounting surface 701 (see FIG. 7), the force generated by fastening the screws 87 acts in the mounting case 801. . This force can be generally expressed using a stress distribution curve as shown in FIG. FIG. 8 shows that the value of the stress acting in the mounting case 801 gradually decreases as the distance from the center of the cylindrical portion 821Ca and the like increases.

  Here, the stress value shown as the vertical axis in the drawing (that is, how the scale of the vertical axis is shaken) and the like are the mounting case 801, in particular, the specific shape and structure of the cover portion 820, the cover portion 820, etc. It is influenced by the material of the screw 87, the Young's modulus of the material, the fastening force / axial force of the screw 87, etc., and cannot be determined. However, if the stress values are specifically determined in consideration of the above considerations (that is, the specific shape of the curve as shown in FIG. 8 and how the horizontal and vertical scales are oscillated) are determined. If so, a specific threshold value that should not be applied to the electro-optical device 500, particularly the image display region 10a, can be determined from the stress value. Such a threshold causes a distortion which cannot be ignored in the TFT array substrate 10 and the counter substrate 20 in the vicinity thereof when a stress exceeding the threshold value acts on the image display region 10a, or the TFT array substrate 10 and the counter substrate 20 It can be determined by an index that there is a possibility that color irregularity may be generated on the image by narrowing the cell gap between the 20 or the like.

  In FIG. 8, the threshold value that can be determined as described above is generally indicated as “σ1”. When the threshold value σ1 is determined in this way, if the image display region 10a does not fall within the distance “D” at the intersection of the threshold value σ1 graph (graph parallel to the horizontal axis) and the stress distribution curve, There is no risk of suffering such problems. In the first embodiment, the distance US and the distance DS equal to the distance US and the distance LS and the distance RS equal to the distance US described with reference to FIG. 5 are determined in consideration of the viewpoint as shown in FIG. It has been.

The graph as shown in FIG. 8 is basically valid for all the cylindrical portions 821a, 821b, 821c, and 821d. Further, for example, in the plan view as shown in FIG. 5, straight lines extending in any direction from the respective cylindrical portions 821a, 821b, 821c and 821d (provided that they are limited to the region where the mounting case 801 exists) are shown in FIG. This graph of FIG. 8 is considered to be valid for all of the space. Further, in the above description, the threshold value σ1 as a general index is introduced in FIG. 8, but in order to determine this specifically, the above-described various consideration factors (such as the Young's modulus of the material of the cover portion 820). In addition, the fastening force of the screw 87 is particularly helpful. More specifically, according to the study by the inventors of the present application, when other conditions (for example, the brightness of the lamp unit 1102 shown in FIG. 1) are appropriately determined, the image display area 10a has 1-2. It has been confirmed that color unevenness occurs on an image when a stress of [N / mm ² ] is applied. The threshold value σ1 can be determined in consideration of such circumstances.

  In the electro-optical device with a mounting case according to the first embodiment having the above-described configuration, the following operational effects can be obtained. First, since the mounting case-mounted electro-optical device can be mounted on the projection display device using the four mounting holes 821a to 821d, the mounting between the two can be performed more firmly. it can. As a result, even when light is projected from the relatively strong light source onto the electro-optical device with the mounting case and the temperature rises, the electro-optical device 500 is hardly displaced in the mounting case 801. Can do. Therefore, according to the first embodiment, when image display is performed using the electro-optical device with a mounting case as the light valves 100R, 100G, and 100B, a situation in which the image quality is deteriorated due to the displacement. As a normal condition, a high-quality image can be displayed.

  Second, according to the first embodiment, the formation positions of the attachment holes 821a to 821d are based on the stress distribution curve with the center 10aC of the image display region 10a as a reference and the attachment holes 821a to 821d as the center. (See FIGS. 5 and 8), the image displayed by the liquid crystal projector 1100 using the electro-optical device with the mounting case as the light valves 100R, 100G, and 100B does not cause color unevenness. . This will be described in more detail with reference to FIG. 7 and FIG. 9 which is a comparative example. FIG. 9 is a side view of the electro-optical device with a mounting case in which the mounting hole shown on the left side in the drawing in relation to FIG. 7 is arranged closer to the image display region 10a. Moreover, in these FIG.7 and FIG.9, the mode of the stress generate | occur | produced centering on this attachment hole by the cause of fastening of the screw with respect to an attachment hole is illustrated. It is conceptually shown that the degree of stress decreases as the hatching density in the concentric circles decreases.

  First, since the mounting hole 821a ′ in FIG. 9 is disposed relatively close to the image display area 10a, an influential stress generated from the center of the mounting hole 821a ′ (in FIG. Stress) is applied to the image display area 10a. This causes a phenomenon that cannot be ignored in the TFT array substrate 10 and the counter substrate 20 in the vicinity of the image display area 10a, or a phenomenon that the cell gap in the part is narrower than the other part. This may cause uneven color on the image. Such an event is considered to occur in the same manner with respect to the mounting holes (corresponding to the mounting holes 821b in FIG. 5) existing on the other side of the drawing. It is conceivable that they occur concentrically around two corners sandwiching one side of the image.

  However, in the first embodiment, the mounting hole 821a in FIG. 7 is disposed at a distance US (see FIG. 5) from the center 10aC of the image display region 10a as described above. The stress that has an influence from the center does not reach the image display area 10a. Therefore, in the first embodiment, the color unevenness as described above does not occur on the image.

  The reason why such a difference occurs depends on the determination criteria of the formation position of the mounting hole being different between FIGS. More specifically, it is as follows. That is, the arrangement of the mounting holes 821a ′ in FIG. 9 can be considered to be performed in accordance with the maximum outer shape of the electro-optical device 500, which achieves downsizing and the like of the electro-optical device containing the mounting case. Considering what to do, it can even be considered more natural. However, this causes color unevenness on the image as described above. Therefore, the determination of the mounting hole formation position in the first embodiment is performed based on the following criteria different from FIG. First, the formation positions of some of the attachment holes need to be determined so as to exceed the “displacement” associated with the arrangement of the TFT array substrate 10 and the counter substrate 20. In FIG. 7, the mounting hole 821c is determined from such a viewpoint. That is, the TFT array substrate 10 protrudes from the counter substrate 20 by the formation region of the data line driving circuit 101 and the like formed thereon (see FIGS. 1 and 2), but the mounting position of the mounting hole 821c is It must be determined so as to exceed the “displacement” caused by the protrusion (otherwise, the connection between the cover portion 820 and the mounting surface 701 becomes impossible). As described above, assuming that the formation position of the attachment hole 821c is determined with a certain degree of necessity, the formation position of the attachment hole according to the first embodiment is based on the center 10aC of the image display region 10a. In view of being determined (see FIG. 5 and the like), in FIG. 7, the formation position of the attachment hole 821a is determined at a position farther from the image display area 10a. The reason why “distant” is realized here is because the above-mentioned “displacement” exists. In this way, in the electro-optical device with a mounting case according to the first embodiment, since the formation positions of the mounting holes 821a to 821d are suitably determined, it is possible to prevent color unevenness from occurring on the image. This can be prevented.

  In the above description, the size of the outer shape of the TFT array substrate 10 is larger than that of the counter substrate 20 in the first place, and even when the substrates 10 and 20 are bonded together, the outer shapes do not match. The invention is not limited to such a form. For example, as shown in FIG. 10, which is the same meaning as FIG. 5, the outer dimensions of the TFT array substrate 10 and the counter substrate 20 are the same, but the former is arranged with a certain degree of displacement with respect to the latter. The case where it is done is also included. Even in this case, since the mounting hole is determined based on the center 10aC of the image display area 10a, the above-described effects can be enjoyed in substantially the same manner. This also applies to the second embodiment described later.

  In the above description, the attached surface 701 corresponding to the attachment holes 821a to 821d is threaded. However, in the present invention, this is not essential. Even without adopting such a structure, a stud or a wedge is inserted into the cylindrical portions 821Ca to 821Cd provided in the mounting holes 821a to 821d, and the stud or the wedge or the like and the inner peripheral surface of the cylindrical portion are inserted. The attachment surface 701 and the mounting case 801 may be fixed by pouring an adhesive. Further, a screw may be cut on the inner peripheral surface of the eastern part of the circle, and the mounting surface 701 and the mounting case 801 may be fixed with the screw.

(Second embodiment of electro-optical device with mounting case)
Next, an electro-optical device with a mounting case according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 11 is an exploded perspective view showing the mounting case according to the second embodiment together with the above-described electro-optical device, FIG. 12 is a front view of the electro-optical device with the mounting case, and FIG. 13 is X1 in FIG. -X1 'sectional view, FIG. 14 is a Y1-Y1' sectional view of FIG. 12, and FIG. 15 is a rear view from the Z1 direction of FIG. 16 is a front view of the plate portion constituting the mounting case, FIG. 17 is a side view as viewed from the Z2 direction in FIG. 16, and FIG. 18 is a side view as viewed from the Z3 direction in FIG. . FIGS. 11 to 15 show the mounting cases in a state where the electro-optical device is accommodated therein.

  As shown in FIGS. 11 to 15, the mounting case 601 includes a plate portion 610 and a cover portion 620. The electro-optical device 500 accommodated in the mounting case 601 is the same as that in the first embodiment. The electro-optical device 500 in the mounting case 601 is fixed mainly by an ultraviolet curable resin UV or the like provided so as to correspond to the four corners of the electro-optical device 500 as shown in FIG. (In FIG. 16, the outermost edge of the electro-optical device 500 when the electro-optical device 500 is placed on the plate portion 610 is indicated by a broken line.) In the second embodiment, it is assumed that light enters from the cover unit 620 side, passes through the electro-optical device 500, and exits from the plate unit 610 side. That is, in FIG. 1, the plate portion 610 is opposed to the dichroic prism 1112, not the cover portion 620.

  Hereinafter, a more detailed description of the configuration of the plate portion 610 and the cover portion 620 constituting the mounting case 601 will be given.

  First, as shown in FIGS. 11 to 18, the plate portion 610 is a plate-like member having a substantially quadrilateral shape in plan view, and is disposed so as to face one surface of the electro-optical device 500. The In the second embodiment, the plate portion 610 and the electro-optical device 500 are in direct contact with each other, and the latter is placed on the former.

  More specifically, the plate portion 610 includes a window portion 615, a strength reinforcing portion 614, a bent portion 613, a cover portion fixing hole 612, and mounting holes 611e, 611d, and 611c.

  The window portion 615 has a part of a substantially quadrilateral member that is formed in an opening shape. For example, the window portion 615 is a portion that allows light to pass from above to below in FIG. 13. The window 615 can emit the light transmitted through the electro-optical device 500. As a result, when the electro-optical device 500 is placed on the plate portion 610, the peripheral region located around the image display region 10 a in the electro-optical device 500 abuts the edge of the window portion 615. It becomes like this. The plate unit 610 realizes the holding of the electro-optical device 500 in this way. As described above, the edge portion of the window portion 615 with which the electro-optical device 500 abuts on the plate portion 610 constitutes a “holding portion” according to the present invention (hereinafter referred to as “holding portion 615Z”). (Refer to FIG. 16 and the description regarding the step 611D described later).

  The strength reinforcing portion 614 is formed by processing such that a part of a member having a substantially quadrilateral shape is raised from the plane of other portions, and is a portion having a three-dimensional shape. Thereby, the strength of the plate portion 614 is reinforced. Note that the strength reinforcing portion 614 may be formed at such a position as being substantially in contact with one side of the electro-optical device 500. The bent portion 613 is a portion in which a part of each of two opposing sides of a member having a substantially quadrilateral shape is bent toward the inside of the quadrilateral shape. The outer side surface of the bent portion 613 is in contact with the inner side surface of the cover portion 620 when the plate portion 610 and the cover portion 620 are assembled (see FIG. 13). The cover portion fixing hole 612 is a hole portion for fitting with a convex portion 621 formed at a corresponding position in the cover portion 620. The plate part 610 and the cover part 620 are fixed to each other by fitting the cover part fixing hole 612 and the convex part 621 to each other. In the second embodiment, the cover fixing hole 612 includes two holes as shown in the drawings (hereinafter, when it is necessary to distinguish between these, the cover fixing holes 612a and 612b). Sometimes called). In order to correspond to this, the convex portion 621 is also composed of two convex portions (hereinafter, when these need to be distinguished, they may be called convex portions 621a and 621b).

  In the second embodiment, the plate portion 610 has attachment holes 611e, 611d, and 611c, which will be described in detail later.

  Next, secondly, as shown in FIGS. 11 to 15, the cover portion 620 is a member having a substantially cubic shape, and is on the surface opposite to the surface facing the plate portion 610 of the electro-optical device 500. It arrange | positions so that it may oppose.

  The cover portion 620 is preferably made of a light-shielding resin, metal, or the like so as to prevent light from leaking in the peripheral area of the electro-optical device 500 and to prevent stray light from entering the image display area 10a from the peripheral area. Become. Further, since the cover part 620 preferably functions as a heat sink for the plate part 610 or the electro-optical device 500, the cover part 620 is made of a material having a relatively high thermal conductivity, more specifically, aluminum, It is good to comprise from magnesium, copper, or these each alloy.

  More specifically, the cover part 620 includes a convex part 621, a cover body part 623, a cooling air introduction part 622, and a cooling air discharge part 624. First, as already described, the convex portion 621 is used when being fixed to the plate portion 610, and includes two convex portions 621a and 621b at positions corresponding to the cover portion fixing holes 612a and 612b, respectively. It is formed as. In addition, the convex part 621 which concerns on 2nd Embodiment is formed so that a part of cooling air introduction part 622 or the taper part 622T mentioned later may be comprised as FIG. 12 shows (FIG. 12). From the viewpoint, the convex portion 621 is not originally shown, but this is particularly shown in FIG.

  As shown in FIGS. 11 to 14, the cover main body 623 is a member having a substantially rectangular parallelepiped shape, and is sandwiched between a cooling air introduction portion 622 and a cooling air discharge portion 624 described later. Existing. However, the inside of the rectangular parallelepiped shape is in a state of being cut out so as to accommodate the electro-optical device 500. In other words, the cover main body 623 is more accurately a member having a shape like a box without a lid (in addition, according to such expression, the “lid” referred to here is the plate Part 610 may be considered as such).

  More specifically, the cover main body portion 623 includes a window portion 625 and a side fin portion 628. Of these, the window portion 625 is formed in an opening shape on the bottom surface of the box shape (referred to as an “upper surface” in FIG. 11 or FIG. 13), and from above to below in FIG. 13. This is a part that allows light to pass through. Light emitted from the lamp unit 1102 in the liquid crystal projector 1100 shown in FIG. 1 can enter the electro-optical device 500 through the window 625. On the other hand, the side fin portions 628 are formed on both side surfaces of the cover main body portion 623. The both side surfaces referred to here refer to side surfaces where the cooling air introduction part 622 and the cooling air discharge part 624 described later do not exist. More specifically, the side fin portion 628 is a portion that linearly protrudes from the side surface from the cooling air introduction portion 622 to the cooling air discharge portion 624 as well shown in FIG. 11 or FIG. Includes shapes arranged in a staggered pattern. As a result, the surface area of the cover main body 623 or the cover 620 increases.

  As described above, the outer surface of the bent portion 613 of the plate portion 610 is in contact with the inner surface of the cover portion 620 when the cover portion 620 and the plate portion 610 are assembled (see FIG. 13). . Accordingly, heat in the electro-optical device 500 is efficiently transmitted to the plate portion 610 or the bent portion 613 and the cover portion 620.

  The cooling air introduction portion 622 includes a tapered portion 622T and an air guide plate 622P as well shown in FIG. 11 or FIG. In the second embodiment, the tapered portion 622T has an outline like a triangular prism whose bottom surface is a right triangle. The tapered portion 622T has an outer shape in which one side surface of the triangular prism is attached to one side surface of the cover main body portion 623. In this case, one side surface of the triangular prism includes a side sandwiched between a right angle portion on a bottom surface of the triangular prism and a corner portion adjacent thereto. Accordingly, the taper portion 622T has a root portion 622T1 having a maximum height on the side surface of the cover main body portion 623 (where “height” refers to a distance in the vertical direction in FIG. 14). 14, a broken line extending in the direction is shown as a guideline.), And has a shape having a tip 622T2 with a height gradually reduced therefrom. On the other hand, the air guide plate 622P has an outer shape such as a wall erected along one side sandwiched between two corners excluding a right angle portion on the bottom surface of the triangular prism. Explaining using the “height”, the height of the air guide plate 622P is such that the height of the tapered portion 622T decreases from the root portion 622T1 toward the tip portion 622T2, but the root portion 622T1. And any portion between the tip portions 622T2.

  Finally, the cooling air discharge part 624 includes a flexible connector lead-out part 624C and a rear fin part 624F as well shown in FIG. 11, FIG. 12, or FIG. Among these, the flexible connector lead-out portion 624C is formed on the side surface facing the side surface of the cover body portion 623 where the tapered portion 622T is formed. More specifically, as shown in FIG. 15, a member having a U-shaped cross section is mounted on the side surface with the opening of the U-shaped cross section facing downward in FIG. It has a unique shape. The flexible connector 501 connected to the electro-optical device passes through the space surrounded by the U-shape and is drawn out to the outside.

  On the other hand, the rear fin portion 624F is provided on the so-called ceiling plate of the U-shaped cross section in the flexible connector lead-out portion 624C. More specifically, the rear fin portion 624F has a sign and a direction in which the linear protruding portion serving as the side fin portion 628 extends as shown in FIG. 11, FIG. 12, or FIG. In order to match, a plurality of portions protruding linearly from the ceiling board are included in parallel (in FIG. 11 and the like, “four” protruding portions are aligned in parallel). Thereby, the surface area of the cover part 620 increases.

  When the cover unit 620 is configured as described above, the wind sent from the sirocco fan 1300 provided in the liquid crystal projector 1100 as shown in FIG. 1 is around the mounting case 601 or the cover unit 620. It will flow as shown in FIG. FIG. 19 is a perspective view of the electro-optical device with a mounting case, and shows a typical wind flow with respect to the electro-optical device with the mounting case. In the liquid crystal projector 1100 shown in FIG. 1, in order to realize the flow of the cooling air as shown in FIG. 19, the outlets 100RW, 100GW and 100BW described with reference to FIG. It is necessary to install a mounting case-encased electro-optical device, that is, the light valves 100R, 100G, and 100B, so as to face the cooling air introducing portion 622.

  The mounting case 601 according to the second embodiment is efficiently cooled by the flow of wind such as the cooling winds W1, W2, and W3 shown in FIG. This is very effective in finally dissipating the heat transferred in the order of the electro-optical device 500, the plate portion 610, and the cover portion 620 to the outside. In particular, in the second embodiment, the wind (reference numeral W2 in the figure) that should not have been on the cover part 620 by the wind guide plate 622P or the like is supposed to be applied to the mounting case 601 or the cover part 620. Special effects such as a point that can be used for cooling, or a point that the side fin portion 628 and the rear fin portion 624F promote cooling of the cover portion 620 are exhibited.

  Further, the fact that the cover unit 620 is efficiently cooled can effectively maintain the heat flow from the electro-optical device 500 to the plate unit 610 via the bent unit 613 or the like or to the cover unit 620 at any time. Means that. That is, since the cover part 620 is suitably cooled in a normal state, by keeping the function as a heat sink effective at any time, taking heat from the plate part 610 as viewed from the cover part 620, and thus electric The heat can be effectively taken from the optical device 500 at any time.

  Therefore, since the electro-optical device 500 according to the second embodiment does not store heat excessively, deterioration of the liquid crystal layer 50 or generation of hot spots is prevented in advance. The risk of incurring degradation of the image based on it will be greatly reduced.

(Mounting hole in plate part and surrounding structure and action)
Hereinafter, the mounting holes 611e, 611d, and 611c in the plate portion 610 and the surrounding configuration and action will be described in detail. The mounting holes 611e, 611d, and 611c are used when the electro-optical device with the mounting case is mounted in the liquid crystal projector 1100 as shown in FIG.

  First, the mounting holes 611e, 611d, and 611c are formed at the apexes of the triangles on the plate-like member having a substantially quadrilateral shape in plan view, as shown in FIG. 11 or FIG. It is formed to be arranged. Particularly in the second embodiment, the mounting holes 611e, 61d and 611c are formed so as to be arranged at the vertices of an isosceles triangle, as well shown in FIG.

  The mounting holes 611a, 611d, and 611c are formed at equidistant positions in the vertical direction and the horizontal direction as viewed from the center of the image display region 10a. More specifically, first, as described with reference to FIGS. 1 and 2, the image display region 10 a according to the second embodiment is within the surface where the TFT array substrate 10 and the counter substrate 20 face each other. It is defined as a part, that is, a region inside the frame light shielding film 53. Here, the outer shape of the TFT array substrate 10 and the counter substrate 20 is larger than the outer shape of the latter, and even if the substrates 10 and 20 face each other, their outer shapes do not match (FIG. 1 and FIG. 1). 2). Therefore, as shown in FIG. 16, the center 500C of the electro-optical device 500 in which the TFT array substrate 10 and the counter substrate 20 are integrated with each other does not coincide with the center 10aC of the image display region 10a.

  In the second embodiment, the attachment holes 611e, 611d, and 611c are formed at equal distances in the vertical direction and the horizontal direction when viewed from the center 10aC of the image display region 10a. First, in the relationship between the mounting hole 611e and the mounting holes 611d and 611c, the former mounting hole 611a is arranged at a distance US in the upward direction in the figure as viewed from the center 10aC, and the latter mounting holes 611d and 611d Similarly, 611c is arranged at a distance DS in the downward direction in the figure. Then, US = DS holds for these distances US and DS. On the other hand, in the relationship between the mounting hole 611d and the mounting hole 611c, the former mounting hole 611d is arranged at a distance LS in the left direction in the drawing as viewed from the center 10aC, and the latter mounting hole 611c is the same. They are arranged at a distance RS in the right direction in the figure. Then, LS = RS holds for these distances LS and RS. As described above, in the second embodiment, the mounting holes 611a, 611d, and 611c are arranged at equal distances in the vertical direction and the horizontal direction when viewed from the center 10aC of the image display region 10a.

  On the other hand, the mounting holes 611e, 611d and 611c are provided with cylindrical portions 611Ce, 611Cd and 611Cc, respectively, as shown in FIG. In the second embodiment, in particular, screws to be attached to the attachment surfaces 701 corresponding to the attachment holes 611a, 611d, and 611c can be screwed. Thereby, it is possible to screw between the plate part 610 and the to-be-attached surface 701 mentioned later.

  Further, as shown in FIGS. 11 and 16 to 18, a step portion 611 </ b> D is formed in the plate portion 610 according to the second embodiment. The step portion 611D is formed to have a different height when viewed from the holding portion 615Z in the plate portion 610. In other words, the plate portion 610 is formed such that a step (or a difference in height) is seen between the step portion 611D and the holding portion 615Z when the plate-like member constituting the plate portion is viewed in cross section. The mounting holes 611e, 611d, and 611c are formed in the step portion 611D.

  Incidentally, in the second embodiment, the height difference h between the stepped portion 611D and the holding portion 615Z is set to 0.1 mm or more. Further, the shape of the stepped portion 611D is relatively easily formed by pressing the surface of the holding portion 615Z (the flat surface where the stepped portion 611D is not formed). be able to. In addition, the holding | maintenance part 615Z mentioned above corresponds to the part of the edge of the window part 615 as already stated. Further, particularly in the second embodiment, the plate portion 610 is provided on the same plane as the holding portion 615Z except for the three portions of the bent portion 613 and the strength reinforcing portion 614 in addition to the step portion 611D. Is formed.

  In the electro-optical device with a mounting case according to the second embodiment having the above-described configuration, the following operational effects can be obtained. First, since the mounting case-mounted electro-optical device can be mounted on the projection display device using the three mounting holes 611e, 611d, and 611c, the mounting between the two is more firmly performed. be able to. Accordingly, even when light is projected from the relatively strong light source to the electro-optical device with the mounting case and the temperature thereof rises, the electro-optical device 500 is hardly displaced in the mounting case 601. Can do. Therefore, according to the second embodiment, when image display is performed using the electro-optical device with a mounting case as the light valves 100R, 100G, and 100B, a situation in which the image quality is deteriorated due to the displacement. As a normal condition, a high-quality image can be displayed.

  Secondly, according to the second embodiment, the formation positions of the mounting holes 611e, 611d, and 611c are determined based on the center 10aC of the image display region 10a, as in the first embodiment (FIG. 16). Thus, color unevenness or the like does not occur in an image displayed by the liquid crystal projector 1100 using the electro-optical device with the mounting case as the light valves 100R, 100G, and 100B. This is because, as in the first embodiment, the force generated by fastening the screws in the mounting holes 611e, 611d, and 611c does not reach the image display area 10a.

  Incidentally, in the second embodiment, even if the mounting holes 611e, 611d and 611c and the mounted surface 701 are screwed together, the force generated by the fastening is directly electro-optic compared to the first embodiment. The apparatus 500 is not reached (see each of FIGS. 11 to 18). In particular, regarding the mounting holes 611d and 611c, it is unlikely that the screws fastened to them directly exert a force on the electro-optical device 500. Therefore, the effect of preventing the occurrence of color unevenness in the image is more reliably achieved. In general, a configuration capable of obtaining such an operational effect can be expressed as “an electro-optical device in which projection light is incident on the image display region from a light source and a surface facing the electro-optical device. And a cover that covers the electro-optical device and has a portion that comes into contact with the plate, and at least a part of a peripheral region located around the image display region in the electro-optical device is formed on the plate and the cover. A mounting case-containing electro-optical device having a mounting case for holding at least one of the electro-optical devices and holding the electro-optical device, wherein the plate attaches the mounting case-containing electro-optical device to a mounting portion of the projection display device. It is provided with an attachment portion for attachment, and the attachment between the attachment portion and the attached portion is performed without the cover ”.

  Third, in the second embodiment, since the three-point fixing by the mounting holes 611e, 611d, and 611c is possible, the mounting of the plate portion 610 to the mounting surface 701 can be more preferably performed. it can. More specifically, when the three points are determined, the plane on which these three points are placed is uniquely determined. However, according to the second embodiment, the “planing” is performed so that the surface of the plate portion 610 is placed on the plane. Above, attachment between this plate part 610 and the to-be-attached surface 701 can be implemented. According to this, even if the plate portion 610 is gently bent, distorted, warped or the like, the plate portion 610 and the mounting surface can be used without worrying about these. The attachment of 701 can be performed accurately. Incidentally, such an operational effect is more effectively exhibited by the attachment holes 611e, 611d, and 611c being formed in the stepped portion 611D.

  In the above description, the mounting surface 701 corresponding to the mounting holes 611e, 611d, and 611c is threaded. However, in the present invention, this is not essential. Even without adopting such a structure, a stud or a wedge or the like is inserted into the cylindrical portions 611Ce, 611Cd and 611Cc provided in the mounting holes 611e, 611d and 611c, and the stud or the wedge and the inner peripheral surface of the cylindrical portion. The attachment surface 701 and the plate portion 610 may be fixed by pouring an adhesive between them. Further, a screw may be cut on the inner peripheral surface of the cylindrical portion, and the attachment surface 701 and the plate portion 610 may be fixed with the screw.

  Moreover, in said 2nd Embodiment, although the "attachment part" said to this invention was formed as three attachment holes 611e, 611d, and 611c so that it might exist in each vertex of an isosceles triangle, The present invention is not limited to such a form. For example, a form as shown in FIG. 20 can be adopted. Here, FIG. 20 is a diagram having the same concept as FIG. 16, and shows a different attachment hole formation mode from FIG. 16.

  In FIG. 20, as in FIG. 16, there is no change in that three mounting holes 611e, 611d, and 611c are formed so as to be positioned at the vertices of the isosceles triangle. FIG. 20 is different in that attachment holes 611a and 611b are newly formed in addition to these attachment holes 611e, 611d, and 611c. That is, in this embodiment, five mounting holes 611a to 611e are formed for convenience.

  The five mounting holes 611a to 611e have the following characteristics. First, among these five mounting holes 611a to 611e, the three mounting holes 611e, 611d and 611c adopt the same mode as that of FIG. 16, that is, the screwing method. Therefore, as long as the mounting using only these is performed, the same effect as described above can be obtained.

  Second, of these three mounting holes 611e, 611d and 611c, two mounting holes 611d and 611c and the newly formed mounting holes 611a and 611b are as shown in FIG. In addition, the plate portion 610 is formed so as to correspond to the four corners of a plate-like member having a substantially quadrilateral shape. And the adhesion system is employ | adopted for these attachment holes 611d, 611c, 611a, and 611b. Here, as shown in FIG. 21 (represented by the mounting hole 611d among the four mounting holes), the bonding method according to the second embodiment is inserted into the cylindrical portion 611Cd. Further, the attachment hole 611d, that is, the plate portion 610 and the attachment surface 701 are joined by the adhesive 90 poured into the periphery of the wedge 89 so as to fill the inside of the wedge 89 and the cylindrical portion 611Cd. In this case, as is apparent from the drawing, whether or not the screw is cut on the inner peripheral surface of the cylindrical portion 611Cd does not hinder the adoption of the bonding method. That is, it can be said that the cylindrical portion 611Cd (and the cylindrical portion 611Cc) is configured to be capable of both a screwing method and an adhesion method.

  According to such a configuration, in addition to being able to perform three-point fixing by screwing using the mounting holes 611e, 611d and 611c, four-point fixing by bonding using the mounting holes 611a to 611d is performed. be able to. Therefore, it is possible to adopt the former method when a female screw is formed on the surface to be attached 701, and adopt the latter method when it is not formed. That is, regardless of the configuration of the mounted surface 701, the plate portion 610 and the mounted surface 701 can be mounted with a high degree of freedom.

  Further, in the case where the plurality of mounting holes 611a to 611e are formed in this way, it is necessary to suitably adjust the arrangement relationship between these and the flexible connector 501, etc. In the form shown in FIG. Of the five mounting holes 611a to 611e, the mounting holes 611c and 611d used in common for both the three-point fixing and the four-point fixing are provided corresponding to the side on which the mounting holes are formed. Adjustment is suitably performed. That is, the flexible connector 501 can be derived more easily (if the flexible connector is disposed on the mounting hole 611e side, it is difficult to derive the flexible connector 501).

  Even in the case where the five mounting holes 611a to 611e are provided, they are formed at equal distances in the vertical and horizontal directions when viewed from the center 10aC of the image display region 10a. Needless to say, the form is completely the same (see FIG. 20).

  The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification, and includes a mounting case with such a change. An electro-optical device, a projection display device, and a mounting case are also included in the technical scope of the present invention.

It is a top view of the embodiment of the projection type liquid crystal device concerning the present invention. 1 is a plan view of an embodiment of an electro-optical device according to the invention. It is HH 'sectional drawing of FIG. 1 is an exploded perspective view showing a mounting case according to a first embodiment of the present invention together with an electro-optical device. 1 is a front view of an electro-optical device with a mounting case according to a first embodiment. It is a rear view of the electro-optical device with a mounting case according to the first embodiment. It is the side view which faced from the Q1 direction of FIG. It is a graph of the stress distribution curve which spreads centering on an attachment hole. It is a comparative example with respect to FIG. FIG. 6 is a diagram having the same concept as in FIG. 5, and shows a different configuration of the TFT array substrate and the counter substrate constituting the electro-optical device. FIG. 6 is an exploded perspective view showing a mounting case according to a second embodiment of the present invention together with an electro-optical device. FIG. 6 is a front view of an electro-optical device with a mounting case according to a second embodiment. It is X1-X1 'sectional drawing of FIG. It is Y1-Y1 'sectional drawing of FIG. It is the rear view which faced from the Z1 direction of FIG. It is a front view of the plate part which comprises the mounting case of 2nd Embodiment. It is the side view which faced from the Z2 direction of FIG. It is the side view which faced from the Z3 direction of FIG. It is a perspective view of the electro-optical device with a mounting case of the second embodiment, and is also an explanatory diagram showing how the wind flows in response thereto. It is a figure of the same meaning as FIG. 16, Comprising: The thing in which the formation aspect of an attachment hole differs from FIG. It is explanatory drawing which illustrates an adhesion | attachment system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... TFT array substrate, 10a ... Image display area, 10aC ... Center of image display area, 20 ... Opposite substrate, 400 ... Dust-proof substrate, 50 ... Liquid crystal layer, 500 ... Electro-optical device, 500C ... Center of electro-optical device, 501 ... Flexible connector, 601, 801 ... Mounting case, 610,810 ... Plate part, 611e, 613d, 613c, 614a, 611b ... Mounting hole, 620,820 ... Cover part, 821a, 821b, 821c, 821d ... Mounting hole 87 ... Screw, 89 ... Wedge, 90 ... Adhesive, 701 ... Attached surface, 622 ... Cooling air introduction part, 622T ... Taper part, 622P ... Blasting plate, 623 ... Cover body part, 628 ... Side fin part, 624 ... Cooling air outlet, 624F ... Rear fin, 100R, 100G, 100B ... Light valve, 1100 ... Liquid crystal projector Data, 1102 ... lamp unit

Claims (8)

An electro-optical device in which light from a light source enters the image display area;
A plate that is arranged to face one surface of the electro-optical device, and a cover that covers the electro-optical device and has a portion that contacts the plate;
A mounting case-containing electric device comprising: a mounting case that holds at least one part of a peripheral region positioned around the image display region in the electro-optical device at least one of the plate and the cover and stores the electro-optical device. An optical device,
The cover includes a window portion for allowing light from the light source to enter the electro-optical device, a tapered portion that guides cooling air toward the window portion, and a mounting portion of the projection display device on the tapered portion. A mounting case-containing electro-optical device, comprising: a mounting portion for mounting the mounting case.   2. The mounting case-encased electro-optical device according to claim 1, wherein the plate has an attachment portion for attachment to an attachment portion of the projection display device.   3. The mounting case-encased electro-optical device according to claim 2, wherein the plate-side mounting portion coincides with the cover-side mounting portion.   4. The mounting case-encased electro-optical device according to claim 2, wherein the plate-side mounting portion is formed so as to be arranged at each vertex of a triangle when the plate is viewed in plan. The mounting portion on the plate side includes a mounting hole,
5. The mounting case-encased electro-optical device according to claim 1, further comprising a cylindrical portion whose axis is aligned with a line passing through the center of the mounting hole.   6. The electro-optical device with a mounting case according to claim 1, wherein the taper portion of the cover includes a wind guide plate. An electro-optical device with a mounting case according to any one of claims 1 to 6,
The light source;
An optical system for guiding the projection light to the electro-optical device;
A projection display system comprising: a projection optical system that projects projection light emitted from the electro-optical device. A plate arranged to face one surface of the electro-optical device, and a cover that covers the electro-optical device and has a portion that comes into contact with the plate,
A mounting case for housing the electro-optical device by holding at least one part of a peripheral region located around the image display region in the electro-optical device at least one of the plate and the cover;
The cover includes a window portion for allowing light from the light source to enter the electro-optical device, a tapered portion that guides cooling air toward the window portion, and a mounting portion of the projection display device on the tapered portion. A mounting case comprising a mounting portion for mounting to the mounting case.

Images