JP2013242358A - Electro-optic module, optical unit, and projection type display device - Google Patents

Abstract

An electro-optical module, an optical unit, and a projection display device that can efficiently cool an electro-optical panel with a cooling gas.
In the electro-optical module, the optical unit, and the projection display device, one surface (first surface) of the electro-optical panel is disposed on one side Y1 in the Y-axis direction with respect to the image display region 40a of the electro-optical panel. A plurality of projections 89 for generating turbulent flow projecting higher in the out-of-plane direction (one side Z1 in the Z-axis direction) than the outer surface of the two light-transmitting plates 57 are provided in the X-axis direction. When viewed from one side Y1 in the Y-axis direction, the protrusion 89 protrudes in a triangular shape. Therefore, when the cooling gas is supplied from the one side Y1 in the Y-axis direction toward the electro-optical panel 40 and the electro-optical module 10, the cooling air A that tends to flow along the image display region 40a of the electro-optical panel 40 is projected. A turbulent flow is generated when getting over the portion 89, and the image display area 40a is efficiently cooled.
[Selection] Figure 4

Description

  The present invention relates to an electro-optical module used in an electronic apparatus such as a projection display device, an optical unit including the electro-optical module, and a projection display device including the optical unit.

  When an image is displayed on an electronic device such as a projection display device, light modulated by an electro-optical panel such as a liquid crystal panel is used. Such an electro-optical panel has, for example, a configuration in which an electro-optical material layer is provided between a first substrate and a second substrate. When the temperature of the electro-optical panel rises, the electro-optical material layer is degraded. Occur. For this reason, in an electronic apparatus such as a projection display device, a structure in which cooling air is supplied to the electro-optical panel and the temperature increase of the electro-optical panel is suppressed is adopted.

  In addition, a structure for enhancing the cooling effect on the electro-optical panel has been proposed. For example, when the electro-optical panel is held by a panel holding member such as a frame, a tapered surface is provided in a portion of the panel holding member located on the upstream side of the cooling air, and the cooling air flows along the electro-optical panel by the tapered surface. Has been proposed (see Patent Document 1). In addition, when the electro-optical panel is held by a panel holding member such as a frame, by providing a protrusion on the surface of the panel holding member, a turbulent flow is generated in the cooling air to enhance the cooling effect on the panel holding member. Have been proposed (see Patent Document 2).

JP 2011-28089 A JP 2004-205780 A

  However, when the cooling air flows smoothly along the electro-optical panel by the tapered surface as in the configuration described in Patent Document 1, the cooling air is in a laminar flow state, so the surface of the electro-optical panel is cooled. The effect to do is small.

  Further, in the configuration described in Patent Document 2, the cooling air is cooled through the holding frame that is in contact with the non-display area of the electro-optical panel even though the cooling effect on the panel holding member can be enhanced. Therefore, the effect of cooling the electro-optical panel is small.

  In view of the above problems, an object of the present invention is to provide an electro-optic module capable of efficiently cooling an electro-optic panel with a cooling gas, an optical unit including the electro-optic module, and the optical unit. It is to provide a projection display device.

  In order to solve the above-described problem, an electro-optic module according to the present invention includes a first surface and a second surface opposite to the first surface, the electro-optic panel having an image display region, and the image display region. A plurality of protrusions that protrude toward the opposite side of the second surface from the first surface on the first direction side, and each of the plurality of protrusions is viewed from the first direction. The plurality of protrusions are arranged along a second direction intersecting the first direction.

  The electro-optic module according to the present invention has a plurality of projecting portions projecting in the out-of-plane direction from the first surface of the electro-optic panel in the region on the first direction side with respect to the image display region. When the cooling gas is supplied from the one direction side toward the electro-optical panel, a turbulent flow is generated when the cooling gas that is going to flow along the image display region gets over the protrusion, and the image display region is efficiently cooled. In particular, in this embodiment, when viewed from the first direction, since the protrusion protrudes in a triangular shape, turbulent flow that descends toward the image display area is efficiently generated when the cooling gas passes over the plurality of protrusions. To do. Therefore, the image display area can be efficiently cooled.

  In the present invention, each of the plurality of protrusions, when viewed from the first direction, includes a first hypotenuse and a second hypotenuse inclined in a direction opposite to the first hypotenuse at an angle different from the first hypotenuse. It is preferable to provide. According to this configuration, a difference occurs in the flow velocity and the flowing direction between the cooling gas that attempts to get over the first hypotenuse and the cooling gas that tries to get over the second hypotenuse. Therefore, since turbulent flow is generated efficiently, the image display area can be efficiently cooled.

  In the present invention, each of the plurality of protrusions includes a first hypotenuse inclined at a first angle with respect to the first surface when viewed from the first direction, and the first oblique surface with respect to the first surface. And a second hypotenuse that is inclined in a direction opposite to the first hypotenuse at a second angle greater than the first angle with respect to the surface, and the first hypotenuse is on the second direction side of the second hypotenuse. It is preferable that they are arranged. According to such a configuration, since the turbulent flow does not collide and the flow velocity does not decrease, the image display area can be efficiently cooled.

  In this invention, it has a panel holding member which hold | maintains the said electro-optical panel, and these protrusions are high toward an out-of-plane direction from the part which overlaps with the said 1st surface of the said electro-optical panel in the said panel holding member. It is preferable that it protrudes. When the electro-optical panel is held by the panel holding member, the cooling gas flows along the panel holding member. As a result, the cooling gas tends to flow away from the image display area. A turbulent flow descending toward the region is efficiently generated. Therefore, even when the electro-optical panel is held by the panel holding member, the image display area can be efficiently cooled. Moreover, the protrusion for generating turbulent flow can be provided without adding another member.

  In the present invention, the panel holding member includes a frame-shaped first holding member that supports the electro-optic panel laterally, and a second holding member that overlaps the first surface of the electro-optic panel, The plurality of protrusions may employ a configuration that protrudes higher in the out-of-plane direction than the portion of the second holding member that overlaps the first surface of the electro-optical panel.

  In this case, it is possible to employ a configuration in which the plurality of protrusions are bent from the outer edge of the second holding member toward the out-of-plane direction.

  In the present invention, the plurality of protrusions may adopt a configuration formed in a portion of the first holding member exposed from the second holding member.

  In this case, among the plurality of protrusions, the bottom of the gap formed between the protrusions adjacent in the second direction has the same height as the surface of the second holding member on the electro-optical panel side. It is preferable that it exists in a position or a position lower than the said surface. According to such a configuration, it is possible to efficiently generate turbulent flow because the protrusion is high without adopting a structure in which the tip of the protrusion largely protrudes toward the one surface side from the electro-optical panel and the electro-optical module. Can do.

  In the present invention, it is preferable that the formation densities of the plurality of protrusions are different within a range in which the image display region extends in the second direction. According to this configuration, since the degree of turbulence can be changed in the second direction, the degree of cooling in the image display area can be changed. Therefore, if the protrusions are formed at a high density in a region where the temperature rise is large in the image display region, the temperature distribution in the image display region can be made uniform.

  In the optical unit according to the present invention, a configuration having an electro-optic module and a projection optical system that projects light modulated by the electro-optic module can be used.

  In this case, it is preferable that an optical element that faces the electro-optic module on the first surface side is provided, and that the tips of the plurality of protrusions are separated from the optical element. According to this configuration, even if the protrusion is provided on the first surface side of the electro-optic module, the protrusion and the optical element do not interfere with each other, so that the electro-optic module and the optical element can be arranged at appropriate positions.

  The optical unit according to the present invention can be used in a projection display device. In this case, the projection display device has a light source unit that emits light supplied to the electro-optic module and the electro-optic module. And a cooling device that supplies cooling gas from the first direction.

It is explanatory drawing of the projection type display apparatus as an example of the electronic device to which this invention is applied. It is explanatory drawing which shows the structure of the optical unit used for the projection type display apparatus to which this invention is applied. It is explanatory drawing which shows the detailed structure of the optical unit used for the projection type display apparatus to which this invention is applied. It is a perspective view of the electro-optic module used for the projection type display apparatus which concerns on Embodiment 1 of this invention. It is sectional drawing of the electro-optic module used for the projection type display apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the protrusion for a turbulent flow provided in the electro-optic module which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the arrangement pattern of the protrusion for a turbulent flow provided in the electro-optic module which concerns on Embodiment 1 of this invention. It is a perspective view of the electro-optic module used for the projection type display apparatus which concerns on Embodiment 2 of this invention. It is sectional drawing which expands and shows the edge part of the electro-optic module used for the projection type display apparatus which concerns on Embodiment 2 of this invention.

  Embodiments of the present invention will be described with reference to the drawings. In the following description, as an electronic apparatus to which the present invention is applied, a projection display device using an electro-optic module including a transmissive electro-optic panel (transmissive liquid crystal panel) as a light valve will be described. In the drawings referred to in the following description, the scales are different for each layer and each member so that each layer and each member have a size that can be recognized on the drawing.

[Embodiment 1]
(Configuration of projection display device (electronic equipment))
FIG. 1 is an explanatory diagram of a projection display device as an example of an electronic apparatus to which the present invention is applied, and FIGS. 1A and 1B show a planar configuration of a main part of the projection display device. It is explanatory drawing and explanatory drawing when a main part is seen from the side. FIG. 2 is an explanatory diagram showing the configuration of the optical unit used in the projection display device to which the present invention is applied.

  In the projection display device 1 shown in FIG. 1, a power supply unit 7 is disposed on the rear end side inside the exterior case 2, and a light source lamp unit 8 (light source unit) and a power supply unit 7 are adjacent to each other on the front side of the device. An optical unit 9 is arranged. Further, the base end side of the projection lens unit 6 is located in the center of the front side of the optical unit 9 inside the exterior case 2. On one side of the optical unit 9, an interface board 11 on which an input / output interface circuit is mounted is arranged in the front-rear direction of the apparatus, and a video board 12 on which a video signal processing circuit is mounted is parallel to the interface board 11. Has been placed. On the upper side of the light source lamp unit 8 and the optical unit 9, a control board 13 for device drive control is disposed, and speakers 14R and 14L are disposed on the left and right corners on the front end side of the device.

  Above and below the optical unit 9, intake fans 15A and 15B for cooling the inside of the apparatus are arranged. Further, an exhaust fan 16 is disposed on the side of the apparatus that is the back side of the light source lamp unit 8. Further, an auxiliary cooling fan 17 for sucking the cooling airflow from the intake fan 15A into the power supply unit 7 is disposed at a position facing the ends of the interface board 11 and the video board 12. Among these fans, the intake fan 15B mainly functions as a cooling device for an electro-optical panel described later.

  In FIG. 2, each optical element (element) constituting the optical unit 9 includes an upper light guide 21 or a lower light guide 22 made of a metal such as Mg or Al, including the prism unit 20 constituting the color light combining means. Is supported by The upper light guide 21 and the lower light guide 22 are fixed to the upper case 3 and the lower case 4 with fixing screws.

(Detailed configuration of the optical unit 9)
FIG. 3 is an explanatory diagram showing a detailed configuration of the optical unit used in the projection display device to which the present invention is applied.

  As shown in FIG. 3, the optical unit 9 includes a light source lamp 805, an illumination optical system 923 having integrator lenses 921 and 922 that are uniform illumination optical elements, and a light beam W emitted from the illumination optical system 923 as red light. Color light separation optical system 924 that separates the light beams R, G, and B of green, blue. The optical unit 9 includes three transmissive electro-optical panels 40 (R), 40 (G), and 40 (B) as electro-optical panels (light valves) that modulate light beams of each color, and modulated colors. It has a prism unit 20 as a color light combining optical system for combining light beams, and a projection lens unit 6 for enlarging and projecting the combined light beams on the projection surface. In addition, a relay optical system 927 that guides the electro-optical panel 40 (B) corresponding to the blue light beam B out of the color light beams separated by the color light separation optical system 924 is provided.

  The illumination optical system 923 further includes a reflection mirror 931 so that the optical axis 1a of light emitted from the light source lamp 805 is bent at a right angle toward the front of the apparatus. The integrator lenses 921 and 922 are disposed so as to be orthogonal to each other with the reflection mirror 931 interposed therebetween.

  The color light separation optical system 924 includes a blue-green reflecting dichroic mirror 941, a green reflecting dichroic mirror 942, and a reflecting mirror 943. First, in the blue-green reflective dichroic mirror 941, the blue light beam B and the green light beam G included in the light beam W that has passed through the illumination optical system 923 are reflected at right angles to the green reflecting dichroic mirror 942 side. Head. The red light beam R passes through the blue-green reflecting dichroic mirror 941, is reflected at a right angle by the rear reflecting mirror 943, and is emitted from the red light beam emitting portion 944 to the color light combining optical system side. Next, in the green reflection dichroic mirror 942, only the green light beam G is reflected at right angles out of the blue and green light beams B and G reflected by the blue-green reflection dichroic mirror 941, and the color is emitted from the emission portion 945 of the green light beam. The light is emitted to the side of the photosynthetic optical system. The blue light beam B that has passed through the green reflecting dichroic mirror 942 is emitted from the blue light beam emitting portion 946 to the relay optical system 927 side. In this embodiment, the distances from the light beam emitting portion of the illumination optical system 923 to the color light beam emitting portions 944, 945, and 946 in the color light separation optical system 924 are all set to be substantially equal.

  Condensing lenses 951 and 952 are arranged on the emission side of the emission portions 944 and 945 of the red light beam and the green light beam of the color light separation optical system 924, respectively. Therefore, the red light beam and the green light beam emitted from each light emitting part are incident on these condenser lenses 951 and 952 and are collimated.

  The collimated red and green light beams R and G are incident on the electro-optical panels 40 (R) and 40 (G) after their polarization directions are aligned by the polarizing plates 160 (R) and 160 (G). Modulated and image information corresponding to each color light is added. That is, the electro-optical panels 40 (R) and 40 (G) are switching-controlled by an image signal corresponding to image information by a driving unit (not shown), thereby modulating each color light passing therethrough. Is called. As such driving means, known means can be used as they are.

  On the other hand, the blue light beam B is guided to the corresponding electro-optical panel 40 (B) through the relay optical system 927 and further aligned in the polarization direction by the polarizing plate 160 (B). Modulation is performed according to the image information. The relay optical system 927 is disposed on the front side of the condensing lens 974, the incident-side reflecting mirror 971, the emitting-side reflecting mirror 972, the intermediate lens 973 disposed between these mirrors, and the electro-optical panel 40 (B). Condensing lens 953 is comprised. As for the length of the optical path of each color beam, that is, the distance from the light source lamp 805 to each liquid crystal panel, the blue beam B is the longest, and the light amount loss of this beam is the greatest. However, the light loss can be suppressed by interposing the relay optical system 927.

  Each color light beam modulated through each electro-optical panel 40 (R), 40 (G), 40 (B) is incident on the polarizing plate 161 (R), 161 (G), 161 (B). The transmitted light is incident on the prism unit 20 (cross dichroic prism) and synthesized. The synthesized color image is enlarged and projected onto a projection surface 1b such as a screen at a predetermined position via a projection lens unit 6 having a projection lens system.

(Overall configuration of electro-optic module)
FIG. 4 is a perspective view of the electro-optic module used in the projection display device 1 according to Embodiment 1 of the present invention. FIGS. 4A and 4B show the electro-optic module as viewed from the light incident side. FIG. 6 is a perspective view of the time and an enlarged perspective view of the periphery of a portion surrounded by a circle P of the electro-optic module. 5A and 5B are cross-sectional views of the electro-optic module used in the projection display device 1 according to Embodiment 1 of the present invention. FIGS. 5A and 5B are cross-sectional views of the entire electro-optic module, and FIG. It is sectional drawing which expands and shows the edge part of an electro-optic module.

  4 and 5, the traveling direction of the light source light is indicated by an arrow L11, the traveling direction of the display light after the light source light is modulated by the electro-optical panel 40 is indicated by an arrow L12, and the intake air shown in FIG. The flow of cooling air supplied to the electro-optical panel 40 by the fan 15B or the like is indicated by an arrow A. In the following description, one of the in-plane directions of the electro-optic panel 40 and the electro-optic module is defined as the X-axis direction, the other as the Y-axis direction, and the direction intersecting the X-axis direction and the Y-axis direction. Is the Z-axis direction. In the drawings referred to below, one side in the X-axis direction is the X1 side, the other side is the X2 side, and one side in the Y-axis direction (the side opposite to the side where the flexible wiring board 40i is located) is the Y1 side. The other side is the Y2 side, one side in the Z-axis direction (the side on which the light source light is incident) is the Z1 side, and the other side (the side from which the display light is emitted) is the Z2 side.

  As shown in FIGS. 4 and 5, in this embodiment, when the electro-optical panel 40 is mounted on the projection display device 1 and the optical unit 9 described with reference to FIGS. 1 to 3, the electro-optical panel 40. Is mounted as the electro-optical module 10 held by the panel holding member 30. Here, the electro-optical panels 40 (R), 40 (G), and 40 (B) described with reference to FIG. 3 have the same configuration, and the electro-optical panels 40 (R) and 40 (G). , 40 (B) also have the same configuration for red (R), green (G), and blue (B). Accordingly, in the following description, the electro-optical panel 40, the electro-optical module 10, and the like will be described without attaching (R), (G), and (B) indicating the corresponding colors.

  In the electro-optical panel 40, a light-transmitting first substrate 51 (element substrate) and a light-transmitting second substrate 52 (counter substrate) are bonded to each other with a sealant through a predetermined gap. Quartz glass, heat-resistant glass, or the like is used for the first substrate 51 and the second substrate 52. In this embodiment, quartz glass is used for the first substrate 51 and the second substrate 52. In this embodiment, the electro-optical panel 40 is a liquid crystal panel, and a liquid crystal layer as an electro-optical material layer 450 is held in a region surrounded by a sealing material between the first substrate 51 and the second substrate 52. .

  The first substrate 51 has a quadrangular shape, and the second substrate 52 has a quadrangular shape, like the first substrate 51. An image display area 40a is provided substantially at the center of the electro-optical panel 40. The image display area 40a is an area where light source light is incident and modulated light obtained by modulating the light source light is emitted. In this embodiment, the image display area 40a is provided as a rectangular area, and the sealing material is also provided in a substantially rectangular shape corresponding to the shape. Further, a rectangular frame-shaped peripheral region is provided between the inner peripheral edge of the sealing material and the outer peripheral edge of the image display region 40a.

  In plan view, the first substrate 51 is larger in size than the second substrate 52, and the four side surfaces of the first substrate 51 protrude outward from the side surfaces of the second substrate 52. Therefore, a step portion is formed around the second substrate 52 by the first substrate 51 and the end portion of the second substrate 52, and the first substrate 51 is exposed from the second substrate 52 in the step portion. It is in. Here, of the four end portions of the first substrate 51, the end portion located on the other side Y2 in the Y-axis direction protrudes greatly from the end portion of the second substrate 52 more than the other end portions, and such end portions. A flexible wiring board 40i is connected to the. On the surface of the first substrate 51 facing the second substrate 52, a pixel having a translucent pixel electrode and a pixel transistor (switching element / not shown) corresponding to the pixel electrode in the image display area 40a is matrixed. It is formed in a shape. In addition, a translucent common electrode is formed on the surface of the second substrate 52 facing the first substrate 51. In this embodiment, since the pixel electrode and the common electrode are formed of a light-transmitting conductive film such as an ITO film, the electro-optical panel 40 is a transmissive liquid crystal panel. In the case of such a transmissive liquid crystal panel (electro-optical panel 40), light is incident while light incident from one of the first substrate 51 and the second substrate 52 is transmitted through the other substrate and emitted. Is done. In this embodiment, light (indicated by an arrow L11) incident from the second substrate 52 is transmitted through the first substrate 51 and emitted as modulated light (indicated by an arrow L12). For this reason, the second substrate 52 is disposed on one side Z1 in the Z-axis direction, and the first substrate 51 is disposed on the other side Z2 in the Z-axis direction.

  In the electro-optical panel 40 of the present embodiment, a first translucent plate 56 is attached to the surface of the first substrate 51 opposite to the second substrate 52 with an adhesive or the like, and the first substrate of the second substrate 52 A second translucent plate 57 is attached to the surface opposite to 51 by an adhesive or the like. The first light transmissive plate 56 and the second light transmissive plate 57 are each configured as dust-proof glass, and prevent dust and the like from adhering to the outer surface of the first substrate 51 and the outer surface of the second substrate 52. For this reason, even if dust adheres to the electro-optical panel 40, the dust is separated from the electro-optical material layer 450. Therefore, it is possible to suppress dust from being projected as an image on the image projected from the projection display device 1 described with reference to FIG. Quartz glass, heat-resistant glass, or the like is used for the first light transmitting plate 56 and the second light transmitting plate 57. In this embodiment, the first light transmitting plate 56 and the second light transmitting plate 57 include the first substrate. Like 51 and the 2nd board | substrate 52, quartz glass is used and the thickness is 1.1-1.2 mm.

  Here, the first light transmitting plate 56 is smaller than the first substrate 51 and is provided so as to overlap at least the image display region 40 a of the electro-optical panel 40 with a part of the first substrate 51 exposed. The second light transmitting plate 57 is smaller than the second substrate 52 and is provided so as to overlap at least the image display region 40a of the electro-optical panel 40 with a part of the second substrate 52 exposed. Therefore, step portions are formed around the first light transmitting plate 56 and the second light transmitting plate 57.

(Configuration of panel holding member 30)
In this embodiment, when the electro-optical panel 40 is mounted on the optical unit 9 of the projection display device 1, the electro-optical module 10 is configured such that the electro-optical panel 40 is held by the panel holding member 30 for the purpose of reinforcement. In this embodiment, the panel holding member 30 overlaps the frame 60 (first panel holding member) that supports the electro-optic panel 40 on the side and one surface side (one side Z1 in the Z-axis direction) of the electro-optic panel 40. A parting member 80 (second panel holding member) is used.

  The frame 60 is a rectangular frame-shaped resin member or metal member having a rectangular opening 68 at the center, and includes a frame portion 61 surrounding the electro-optical panel 40. In the frame portion 61, connecting portions (corner portions) between adjacent sides are cylindrical connecting portions 651, 652, 653, and 654. In this embodiment, the frame 60 is a metal member.

  In the frame 60, the inner side surface of the frame portion 61 has a multistage structure corresponding to the shape of the end portion of the electro-optical panel 40. Therefore, after the parting member 80 is attached to the frame 60, when the electro-optical panel 40 is mounted inside the frame 60, the electro-optical panel 40 is supported by the parting member 80 from one side in the Z direction, and the periphery is The state is supported by the stepped portion of the frame 60.

  On one side Y1 in the Y-axis direction, in the frame portion 61 of the frame 60, a plane portion 612 is formed on a surface 611 facing the one side Z1 in the Z-axis direction, and one side Y1 in the Y-axis direction is formed on the plane portion 612. In the adjacent position, a tapered surface 613 is formed which is inclined obliquely from one side Z1 in the Z-axis direction toward one side Y1 in the Y-axis direction. Further, the surface 611 is formed with a flat surface 614 at a position adjacent to the tapered surface 613 on one side Y1 in the Y-axis direction, and at a position adjacent to the flat surface 614 on one side Y1 in the Y-axis direction, A tapered surface 615 that is inclined obliquely from one side Z1 to one side Y1 in the Y-axis direction is formed. Accordingly, the surface 611 of the frame portion 61 of the frame 60 is tapered from the one side Y1 in the Y-axis direction (side end surface 619 side) toward the other side Y2 in the Y-axis direction (opening 68 and image display area 40a). A surface 615, a plane portion 614, a tapered surface 613, and a plane portion 612 are formed in this order.

  On the other hand, on one side Y1 in the Y-axis direction, a plane 617 is formed on the surface 616 facing the other side Z2 in the Z-axis direction of the frame portion 61 of the frame 60, and a Y-axis is formed on the plane 617. A tapered surface 618 that is inclined obliquely from the other side Z2 in the Z-axis direction toward the one side Y1 in the Y-axis direction is formed at a position adjacent to one side Y1 in the axial direction.

  The parting member 80 is made of a metal plate or a resin plate. In this embodiment, the parting member 80 is made of a metal plate provided with a black layer. The parting member 80 includes a rectangular end plate portion 87 that overlaps the frame 60 on the light incident side, and the end plate portion 87 has a rectangular opening in a region that overlaps the image display region 40 a of the electro-optical panel 40. 88 is formed. The opening 88 is smaller than the opening 68 of the frame 60, and the end plate part 87 protrudes inside the opening 68 on the entire circumference of the opening 68. For this reason, the end plate part 87 of the parting member 80 functions as a parting part that restricts a range in which light enters the electro-optical panel 40.

  The parting member 80 includes side plate portions 81 extending from outer edges located on both sides of the end plate portion 87 in the X-axis direction along the outer surface of the frame portion 61 of the frame 60 toward the other side Z2 in the Z-axis direction. ing. In this embodiment, the side plate portions 81 are provided at two locations that are separated from each other in the Y-axis direction, and an engagement hole 810 is formed in each of the two side plate portions 81. On the other hand, on the outer surface of the frame portion 61 of the frame 60, engagement protrusions 647 that fit into the two engagement holes 810 are formed. Therefore, the parting member 80 is connected to the frame 60 by the side plate portion 81 engaging with the engaging protrusion 647 of the frame 60, and is integrated with the frame 60. As a result, a panel housing portion having the end plate portion 87 of the parting member 80 as a bottom portion is formed inside the frame 60, and the electro-optical panel 40 is housed in the panel housing portion.

  Engagement projections 648 and 649 are formed on the outer surface of the frame portion 61 of the frame 60 between the two engagement projections 647, and the projection 648 is formed on the side plate portion 81 of the parting member 80. The side plate portion 81 is positioned in contact with the edge. The engaging protrusion 649 is a stopper that holds the electro-optical panel 40 inside the frame 60 until the adhesive applied between the frame 60 and the electro-optical panel 40 is solidified when the electro-optical module 10 is assembled. (Not shown) engage. The stopper may be formed as a frame-like member similar to the incident-side parting member 80, and the stopper may be used as the exit-side parting member.

(Cooling structure for the electro-optical panel 40)
FIG. 6 is an explanatory view showing a turbulent-flow generating protrusion provided in the electro-optic module 10 according to Embodiment 1 of the present invention. FIGS. 6A and 6B are protrusions according to the present embodiment. FIG. 6 is an explanatory diagram viewed from the Y-axis direction, and an explanatory diagram viewed from the Y-axis direction of a protrusion according to a modification of the present embodiment. FIG. 7 is an explanatory diagram showing an arrangement pattern of protrusions for generating turbulent flow provided in the electro-optic module 10 according to Embodiment 1 of the present invention, and FIGS. 7A and 7B show the present embodiment. It is explanatory drawing which looked at the arrangement pattern of the protrusion of this invention from the Y-axis direction, and explanatory drawing which saw the arrangement pattern of the protrusion which concerns on the modification of this form from the Y-axis direction.

  In the projection display device 1 of the present embodiment, cooling air (arrow A in FIGS. 4 and 5) is supplied to the electro-optic module 10 from one side Y1 in the Y-axis direction by an intake fan 15B (cooling device) shown in FIG. ) And cooling air is passed through at least one side Z1 of the electro-optic module 10 in the Z-axis direction to cool the electro-optic panel 40 and prevent the electro-optic material layer 450 from deteriorating. At this time, in the frame 60 of the electro-optic module 10, since the tapered surfaces 613 and 615 are formed on one side Y <b> 1 in the Y-axis direction of the frame portion 61, the cooling air A flows along the tapered surfaces 613 and 615. . Therefore, the electro-optic module 10 efficiently flows along the surface on the one side Z1 in the Z-axis direction. Further, the cooling air A may flow along the tapered surface 618 and may also pass through the other side Z1 of the electro-optic module 10 in the Z-axis direction.

  Here, in the surface on one side Z1 in the Z-axis direction of the electro-optic module 10, the portion of the image display region 40a of the electro-optic panel 40 is Z-axis than the surface on the one side Z1 in the Z-axis direction of the panel holding member 30. It is in a position recessed in the other side Z2 of the direction. Therefore, in the present embodiment, as will be described below, the cooling air A flowing through one side Z1 of the electro-optic module 10 in the Z-axis direction is turbulent, so that the cooling air A is displayed in the image display area of the electro-optic panel 40. The cooling efficiency with respect to the image display area 40a of the electro-optical panel 40 is increased.

  Specifically, the electro-optic module 10 has one side Y1 in the Y-axis direction (first direction) in the in-plane direction (X-axis direction and Y-axis direction) of the image display area 40a with respect to the image display area 40a. On one side of the electro-optic panel 40 (the first surface / the outer surface of the second light-transmitting plate 57 / the surface on the one side Z1 in the Z-axis direction) that protrudes higher toward the one side Z1 in the Z-axis direction. A plurality of flow generating projections 89 are provided in the X-axis direction. In other words, in the electro-optic module 10, the electro-optic panel 40 is disposed on one side Y1 (first direction side) in the Y-axis direction with respect to the image display region 40a from one surface (first surface) of the electro-optic panel 40. There are a plurality of turbulent flow generation projections 89 in the X-axis direction that protrude high toward the opposite side to the other surface (the second surface / the outer surface of the first light transmitting plate 56 / the surface on the other side Z2 in the Z-axis direction). Is provided. In this embodiment, the protrusion 89 is formed over the entire region overlapping in the Y-axis direction with respect to the region sandwiched between the connecting portions 651 and 652 of the frame 60.

  In the present embodiment, the protrusion 89 is Z from the portion of the panel holding member 30 that holds the electro-optical panel 40 that overlaps the surface on the one side Z1 in the Z-axis direction of the electro-optical panel 40 (the end plate portion 87 of the parting member 80). It protrudes high in the axial direction (out-of-plane direction). More specifically, the protrusion 89 has the outer edge on one side Y1 in the Y-axis direction of the end plate portion 87 of the parting member 80 directed toward one side Z1 in the Z-axis direction as shown in FIG. The projection 89 is bent so as to be inclined obliquely from one side Z1 in the Z-axis direction to one side Y1 in the Y-axis direction. A tip 890 in the Z-axis direction of the protrusion 89 is located higher in the Z-axis direction than one surface of the electro-optical panel 40 (the outer surface of the second light transmissive plate 57), and is formed between the protrusions 89. A bottom 896 of the gap 895 in the Z-axis direction is slightly higher in the Z-axis direction than one surface of the electro-optical panel 40 (the outer surface of the second light transmitting plate 57).

  According to such a configuration, as shown in FIG. 5B, when the cooling air A flowing from one side Y1 in the Y-axis direction gets over the protrusion 89, turbulence is generated, and the electro-optical panel 40 2 Lowers toward the outer surface of the translucent plate 57. For this reason, the image display area 40a of the electro-optical panel 40 can be efficiently cooled.

  Here, in the optical unit 9 and the projection display device 1, as shown in FIG. 3, the incident-side polarizing plate 160 (optical element) faces the electro-optical module 10 on one side Z <b> 1 in the Z-axis direction. In this embodiment, the tip 690 of the protrusion 69 is separated from the incident-side polarizing plate 160. For this reason, even if the protrusion 69 is provided on one side Z1 in the Z-axis direction of the electro-optic module 10, the protrusion 69 and the polarizing plate 160 do not interfere with each other, so the electro-optic module 10 and the polarizing plate 160 are disposed at appropriate positions. can do.

  As shown in FIG. 6A, the protrusion 89 is different from the first oblique side 891 when viewed from one side Y <b> 1 in the Y-axis direction and the first oblique side 891 on the basis of one surface of the electro-optical panel 40. A shape having a first hypotenuse 891 at an angle and a second hypotenuse 892 inclined in the opposite direction can be employed. Here, the first hypotenuse 891 is inclined at a first angle with respect to the surface on one side in the Z-axis direction of the second translucent plate 57 of the electro-optical panel 40, and the second hypotenuse 892 is formed on the electro-optical panel 40. The second translucent plate 57 is inclined at a second angle larger than the first angle with respect to the surface on one side in the Z-axis direction. Further, as shown in FIG. 6B, the protrusion 89 has the same angle between the first hypotenuse 891 and the first hypotenuse 891 when viewed from one side Y1 in the Y-axis direction. A shape having a second hypotenuse 892 inclined in the opposite direction may be employed. However, according to the protrusion 89 shown in FIG. 6A, the flow velocity and the flowing direction between the cooling air A that attempts to get over the first hypotenuse 891 and the cooling air A that tries to get over the second hypotenuse 892. There will be a difference. Therefore, since turbulent flow is generated efficiently, there is an advantage that the image display area 40a can be efficiently cooled.

  Further, as an arrangement pattern of the plurality of protrusions 89 in the X-axis direction, as shown in FIG. 7A, the plurality of protrusions 89 are all on the same side in the X-axis direction with respect to the first hypotenuse 891. A pattern having a second hypotenuse 892 on the other side X2 in the X-axis direction can be employed. Further, as an arrangement pattern of the plurality of protrusions 89 in the X-axis direction, as shown in FIG. 7B, the plurality of protrusions 89 are arranged on the other side X2 in the X-axis direction with respect to the first hypotenuse 891. A pattern including a group of protrusions 89 having a second oblique side 892 and a group of protrusions 89 having a second oblique side 892 on one side X1 in the X-axis direction with respect to the first oblique side 891. Can be adopted. However, according to the arrangement pattern shown in FIG. 7A, there is an advantage that the image display region 40a can be efficiently cooled because the turbulent flow does not collide and the flow velocity does not decrease.

  Here, the protrusions 69 have a constant pitch in the X-axis direction, and are formed with the same density within a range in which the image display region 40a extends in the X-axis direction.

(Main effects of this form)
As described above, in the electro-optic module 10, the optical unit 9, and the projection display device 1 (electronic device) of this embodiment, one side Y1 in the Y-axis direction (first direction side) with respect to the image display region 40a. Includes a turbulent flow generation projection 89 that protrudes higher in the out-of-plane direction (one side Z1 in the Z-axis direction) than the one surface of the electro-optic panel 40 (the outer surface of the second light transmission plate 57). A plurality are provided in the direction. Therefore, when the cooling gas is supplied from the one side Y1 in the Y-axis direction toward the electro-optical panel 40 and the electro-optical module 10, the cooling air A that tends to flow along the image display region 40a of the electro-optical panel 40 is projected. A turbulent flow is generated when getting over the portion 89, and the image display area 40a is efficiently cooled. In particular, in this embodiment, when viewed from one side Y1 in the Y-axis direction, the protrusion 89 protrudes in a triangular shape, and therefore when the cooling air A gets over the protrusion 89, it descends toward the image display area 40a. Turbulence is generated efficiently. Therefore, the image display area 40a can be efficiently cooled.

  Further, in this embodiment, since the part 89 is formed on the end plate part 87 of the parting member 80 (second holding member) that overlaps the one side Z <b> 1 in the Z-axis direction of the electro-optical panel 40, Since it protrudes higher in the Z-axis direction than the end plate portion 87 that overlaps the surface on one side Z1 in the Z-axis direction of the electro-optic panel 40, turbulent flow is efficiently generated. Further, since the projecting portion 89 is formed on the parting member 80, the projecting portion 89 for generating turbulent flow can be provided without adding another member.

[Embodiment 2]
8 is a perspective view of the electro-optic module 10 used in the projection display device 1 according to Embodiment 2 of the present invention. FIGS. 8A and 8B show the electro-optic module 10 on the light incident side. FIG. 2 is a perspective view of the electro-optic module 10 and a perspective view showing an enlarged periphery of a portion surrounded by a circle P of the electro-optic module 10. FIG. 9 is an enlarged cross-sectional view showing an end portion of the electro-optic module 10 used in the projection display device 1 according to Embodiment 2 of the present invention. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 8 and 9, in this embodiment as well, in the same manner as in the first embodiment, when the electro-optical panel 40 is mounted on the optical unit 9 of the projection display device 1, the electro-optical panel 40 is attached to the panel holding member 30. The electro-optic module 10 held by the above. As in the first embodiment, the panel holding member 30 includes a frame 60 (first panel holding member) that supports the electro-optic panel 40 laterally, and one side of the electro-optic panel 40 (one side Z1 in the Z-axis direction). ) And a parting member 80 (second panel holding member) overlapping with each other.

  In the present embodiment, as in the first embodiment, on one side Y1 in the Y-axis direction of the frame 60, the surface 611 on one side Z1 in the Z-axis direction of the frame portion 61 is in the Y-axis direction with respect to the plane portion 614. A taper surface 615 that is inclined obliquely from one axial side Z1 to one Y1 direction Y1 is formed at a position adjacent to one side Y1 of the flat surface portion 612 and the flat surface portion 614. A taper surface 613 is not formed between them, and a projection 69 for generating a turbulent flow is formed. For this reason, also in the present embodiment, as in the first embodiment, the one side Y1 in the Y-axis direction with respect to the image display region 40a is more than the one surface of the electro-optic panel 40 (the outer surface of the second light transmitting plate 57). A protrusion 69 for generating turbulent flow that protrudes high in the outward direction (one side Z1 in the Z-axis direction) is formed. Here, a plurality of protrusions 69 are provided in the X-axis direction, and the protrusions 69 overlap with the surface on one side Z1 of the electro-optical panel 40 in the Z-axis direction (the end plate portion 87 of the parting member 80). ) Projecting higher in the Z-axis direction (out-of-plane direction).

  In this embodiment, the protrusion 69 is formed as a rib-shaped protrusion having a triangular cross section extending in the Y-axis direction at a position exposed from the parting member 80 in the frame 60. Further, in this embodiment, the protrusion 69 is formed over the entire region sandwiched between the connecting portions 651 and 652 of the frame 60. A tip 690 of the protrusion 69 in the Z-axis direction is located higher in the Z-axis direction than one surface of the electro-optical panel 40 (the outer surface of the second light transmissive plate 57). Further, the bottom 696 in the Z-axis direction of the gap 695 formed between the protrusions 69 is on one surface of the electro-optical panel 40 (the outer surface of the second light-transmitting plate 57) or the end plate portion 87 of the parting member 80. They are at the same height or slightly lower than the surface on the electro-optical panel 40 side.

  As shown in FIG. 6A, the protrusion 69 is similar to the protrusion 89 described in the first embodiment, when viewed from one side Y1 in the Y-axis direction, the first hypotenuse 691 and the first hypotenuse 691. Has a triangular shape with a first hypotenuse 691 and a second hypotenuse 692 inclined in the opposite direction at different angles. Further, as shown in FIG. 7A, each of the plurality of protrusions 69 includes a second hypotenuse 692 on the same side in the X-axis direction with respect to the first hypotenuse 691.

  Here, the protrusions 69 have a constant pitch in the X-axis direction, and are formed with the same density within a range in which the image display region 40a extends in the X-axis direction.

  As described above, also in this embodiment, one side Y1 (first direction side) in the Y-axis direction with respect to the image display area 40a is more out of the plane than the one side of the electro-optic panel 40 (outer side of the second light transmission plate 57). A plurality of projections 69 for generating turbulent flow projecting in the direction (one side Z1 in the Z-axis direction) are provided in the X-axis direction. Therefore, when the cooling gas is supplied from the one side Y1 in the Y-axis direction toward the electro-optical panel 40 and the electro-optical module 10, the cooling air A that tends to flow along the image display region 40a of the electro-optical panel 40 is projected. A turbulent flow is generated when the vehicle passes over the portion 69, and the image display area 40a is efficiently cooled. In particular, in this embodiment, when viewed from one side Y1 in the Y-axis direction, since the protrusion 69 protrudes in a triangular shape, the cooling air A descends toward the image display area 40a when it passes over the protrusion 69. Turbulence is generated efficiently. Therefore, the same effects as in the first embodiment can be obtained, such as the image display area 40a can be efficiently cooled.

  In this embodiment, the electrooptic panel 40 is formed on the frame portion 61 of the frame 60 (first holding member) that holds the electrooptic panel 40 on the side, and the protrusion 69 is formed on the Z-axis of the electrooptic panel 40 in the parting member 80. It protrudes higher in the Z-axis direction than the end plate portion 87 that overlaps the surface of the one side Z1 in the direction. For this reason, turbulent flow is efficiently generated. Further, since the protrusions 69 are formed on the frame 60, the protrusions 69 for generating turbulent flow can be provided without adding another member.

  The tip 69 of the protrusion 69 in the Z-axis direction is located higher in the Z-axis direction than one surface of the electro-optical panel 40 (the outer surface of the second light transmitting plate 57), and is formed between the protrusions 69. The bottom 696 of the gap 695 in the Z-axis direction is at the same height as one surface of the electro-optical panel 40 (the outer surface of the second light-transmitting plate 57) or one surface of the electro-optical panel 40 (the second light-transmitting plate). 57 outer surface). Therefore, even if the structure in which the tip 690 of the protrusion 69 protrudes greatly in the Z-axis direction from the electro-optical panel 40 and the electro-optic module 10 is not adopted, the protrusion 69 is high, so that turbulence can be generated efficiently. be able to.

[Other embodiments]
In the above embodiment, since the protrusions 69 and 89 are formed at an equal pitch in the X-axis direction, the formation density of the protrusions 69 and 89 is constant within the range extending in the X-axis direction. The formation density may be different in the X-axis direction. According to this configuration, since the degree of turbulence can be changed in the X-axis direction, the degree of cooling in the image display area 40a can be changed. Therefore, if the protrusions 69 and 89 are formed at a high density in a region where the temperature rise is large in the image display region 40a, the temperature distribution in the image display region 40a can be made uniform. For example, since the image display region 40a has a large temperature rise on the center side, if the formation density of the protrusions 69 and 89 is higher than both ends at the center in the X-axis direction, the temperature distribution in the image display region 40a is uniform. Can be

  In the above embodiment, the projections 69 and 89 for generating turbulent flow are provided on the light incident side of the electro-optic module 10. However, the projections 69 and 89 for generating turbulent flow are provided on the light emitting side of the electro-optic module 10. It may be provided.

  In the above-described embodiment, the electro-optical module 10 including the transmissive electro-optical panel 40 is illustrated, but the present invention may be applied to the electro-optical module 10 including the reflective electro-optical panel 40.

  In the said embodiment, although the front projection type display apparatus which projects from the direction which observes a projected image as a projection type display apparatus was illustrated, the rear projection type display apparatus which projects from the opposite side to the direction which observes a projected image The present invention may be applied to a projection display device used for the above.

  In the above embodiment, the liquid crystal panel has been described as an example of the electro-optical panel. However, the present invention is not limited to this, and the organic electroluminescence display panel, plasma display panel, FED (Field Emission Display) panel, SED The present invention may be applied to an electro-optic module using a (Surface-Conduction Electron-Emitter Display) panel, an LED (light emitting diode) display panel, an electrophoretic display panel, or the like.

[Other electronic devices]
As for the electro-optic module to which the present invention is applied, in addition to the electronic device (projection display device) described above, a head-mounted display, a mobile phone, a personal digital assistant (PDA), a digital camera, a liquid crystal television, You may use as a direct view type display apparatus in electronic devices, such as a car navigation apparatus, a videophone, a POS terminal, and an apparatus provided with a touch panel.

1. ・ Projection type display device, 10 ・ ・ Electro-optical module, 15B ・ ・ Intake fan (cooling device), 30 ・ ・ Panel holding member, 40 ・ ・ Electro-optical panel (liquid crystal panel), 40a ・ ・ Image display area, 51 .. First substrate (element substrate) 52.. Second substrate (counter substrate) 56.. First light transmitting plate 57.. Second light transmitting plate 60.. Frame (first panel holding member) ), 69, 89 .. Projection for generating turbulent flow, 80 .. Parting member (second panel holding member), 450 ..Electro-optical material layer (liquid crystal layer), 690, 890. 691, 891 .. first hypotenuse, 692, 892 .. second hypotenuse, 695, 895 .. gap, 696, 896 .. bottom of gap

Claims (12)

An electro-optical panel having a first surface and a second surface facing the first surface, and having an image display area;
A plurality of protrusions protruding toward the opposite side of the second surface from the first surface on the first direction side of the image display region;
Have
Each of the plurality of protrusions has a triangular shape when viewed from the first direction,
The electro-optic module, wherein the plurality of protrusions are arranged along a second direction intersecting the first direction.   Each of the plurality of protrusions includes a first hypotenuse and a second hypotenuse that is inclined in a direction opposite to the first hypotenuse at an angle different from the first hypotenuse when viewed from the first direction. The electro-optic module according to claim 1. Each of the plurality of protrusions is viewed from the first direction,
A first hypotenuse inclined at a first angle with respect to the first surface;
A second hypotenuse that is inclined in a direction opposite to the first hypotenuse at a second angle greater than the first angle with respect to the first surface;
With
The electro-optic module according to claim 1, wherein the first hypotenuse is disposed on the second direction side of the second hypotenuse. A panel holding member for holding the electro-optical panel;
The plurality of protrusions protrude higher in an out-of-plane direction than a portion of the panel holding member that overlaps the first surface of the electro-optical panel. The electro-optic module according to 1. The panel holding member includes a frame-shaped first holding member that supports the electro-optic panel laterally, a second holding member that overlaps the first surface of the electro-optic panel,
Have
5. The electro-optic module according to claim 4, wherein the plurality of protrusions protrude higher in an out-of-plane direction than a portion of the second holding member that overlaps the first surface of the electro-optic panel. .   The electro-optic module according to claim 5, wherein the plurality of protrusions are bent in an out-of-plane direction from an outer edge of the second holding member.   The electro-optical module according to claim 5, wherein the plurality of protrusions are formed on a portion of the first holding member exposed from the second holding member.   Among the plurality of protrusions, the bottom of the gap formed between the protrusions adjacent in the second direction is the same height position as the surface of the second holding member on the electro-optical panel side, or The electro-optic module according to claim 7, wherein the electro-optic module is at a position lower than the surface.   The electricity according to any one of claims 1 to 8, wherein the formation density of the plurality of protrusions is different within a range in which the image display region extends in the second direction. Optical module. The electro-optic module according to any one of claims 1 to 9,
A projection optical system for projecting light modulated by the electro-optic module;
An optical unit comprising: An optical element facing the electro-optic module on the first surface side;
The optical unit according to claim 10, wherein tips of each of the plurality of protrusions are separated from the optical element. The optical unit according to claim 10 or 11,
A light source unit that emits light supplied to the electro-optic module;
A cooling device for supplying a cooling gas from the first direction to the electro-optic module;
A projection display device characterized by comprising:

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