JP2015197576A - Electro-optic device and electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electro-optic device and electronic device including the electro-optic device that can alleviate a temperature variation in an in-plane of an electrooptical panel.SOLUTION: In an electro-optic device 100, on other surface 40 side of an electrooptical panel 40 emitting display light from one surface 40e side thereof, a heat radiation grease layer 70, first heat conduction member 71 and second heat conduction member 72 are overlappedly arranged in order. In the electrooptical panel 40, a first substrate 51 and second substrate 52 are a quartz substrate. The first heat conduction member 71 is made up of an aluminum alloy, and is higher in heat conductivity than the electrooptical panel 40. The second heat conduction member 72 is made up of an iron alloy, and is lower in thermal conductivity than the first heat conduction member 71, and higher in thermal conductivity than the electrooptical panel 40.

Description

The present invention relates to an electro-optical device in which a heat dissipation layer is provided on an electro-optical panel, and an electronic apparatus including the electro-optical device.

When an electro-optical panel such as a liquid crystal panel is used in a projection display device or the like, the temperature of the electro-optical panel increases. For this reason, a structure in which a heat sink is stacked on the back side of the electro-optical panel has been proposed (see Patent Document 1).

JP 2009-216855 A

In projection display devices, etc., the surface of the electro-optical panel has a strong light beam that hits the center of the electro-optical panel, but the peripheral part easily dissipates heat to the surroundings, so the center of the electro-optical panel becomes relatively hot. A large temperature distribution tends to occur inside. For this reason, the thermal expansion amount of the electro-optical panel is different in the plane, and a large stress is easily applied to the electro-optical panel. As a result, the electro-optical panel is deformed and the phase difference of the liquid crystal layer varies. Such a variation in phase difference is not preferable because it causes unevenness during black display and causes display quality to deteriorate.

Further, when a heat sink made of an aluminum alloy or the like is stacked on the back side of the electro-optical panel as in the configuration described in Patent Document 1, the effect of removing heat from the electro-optical panel can be enhanced. However, as shown in FIG. 5B, when a heat sink 79 made of an aluminum alloy or the like is superimposed on the electro-optical panel 40 via the heat dissipation grease layer 70, an isotherm is indicated by a dotted line and heat dissipation is indicated by an arrow. As indicated by S11 and S12, in the heat sink 79, the thermal diffusion in the thickness direction is stronger than the in-plane direction of the electro-optical panel. In the electro-optical panel 40, heat is transmitted from the central portion 40h to the peripheral portion, but the electro-optical panel 40 has low thermal conductivity. For this reason, the temperature variation in the surface of the electro-optical panel remains without being relaxed.

In view of the above-described problems, an object of the present invention is to provide an electro-optical device that can alleviate temperature variations in the surface of an electro-optical panel, and an electronic apparatus including the electro-optical device. .

In order to solve the above-described problems, an electro-optical device according to the present invention includes an electro-optical panel that emits display light from one side, a thermal conductivity higher than that of the electro-optical panel, and the other side of the electro-optical panel. A first heat conducting member overlying the first heat conducting member, having a lower thermal conductivity than the first heat conducting member, and higher thermal conductivity than the electro-optic panel, opposite to the electro-optic panel with respect to the first heat conducting member. And a second heat conducting member overlapping on the side.

In the present invention, since the heat of the electro-optical panel is released to the first heat conducting member, it is possible to prevent the temperature of the electro-optical panel from rising excessively. Here, in the first heat conducting member having high heat conductivity, the heat diffusion in the thickness direction is stronger than the in-plane direction, but the first heat conducting member has the first heat conducting member on the side opposite to the electro-optical panel. Since the second heat conductive member having lower heat conductivity than the heat conductive member is provided, the first heat conductive member can suppress the heat diffusion in the thickness direction, and as a result, the heat diffusion in the in-plane direction is strengthened. Therefore, temperature variations in the surface of the electro-optical panel can be reduced. Therefore, the amount of thermal expansion of the electro-optical panel is unlikely to vary in the plane, and thus it is difficult for a large stress to be applied to the electro-optical panel. Therefore, since the deformation of the electro-optical panel can be suppressed, it is possible to avoid a decrease in display quality due to variations in the phase difference of the liquid crystal layer.

The present invention is effective when applied to the case where the other surface side of the electro-optical panel is made of a quartz substrate or a glass substrate. When the other surface side of the electro-optical panel is made of a quartz substrate or a glass substrate, the thermal conductivity is low, and thus temperature variations easily occur within the surface of the electro-optical panel. Even when the direction side is made of a quartz substrate or a glass substrate, temperature variations in the surface of the electro-optical panel can be reduced.

In this invention, it is preferable to have a thermal radiation grease layer between the other surface side of the electro-optical panel and the first heat conducting member. According to this configuration, heat transfer from the electro-optical panel to the first heat conducting member is smooth.

In this invention, it is preferable to have a 3rd heat conductive member laminated | stacked on the opposite side to the said 1st heat conductive member with respect to the said 2nd heat conductive member that heat conductivity is higher than a said 2nd heat conductive member. .
According to such a configuration, the heat of the second heat conducting member can be released smoothly through the third heat conducting member. Therefore, an excessive temperature rise of the electro-optical panel can be suppressed.

In the present invention, the heat conductivity is lower than that of the second heat conductive member, and the third heat conductive member is laminated on the opposite side of the second heat conductive member from the first heat conductive member. May be. According to this configuration, as a result of the second heat conducting member and the third heat conducting member further suppressing the heat diffusion in the thickness direction in the first heat conducting member, the heat diffusion in the in-plane direction is strengthened. Therefore, temperature variations in the surface of the electro-optical panel can be reduced.

In the present invention, the electro-optical panel is a liquid crystal panel. In this case, the electro-optical panel includes a first substrate constituting the other surface side of the electro-optical panel, a second substrate bonded to the first substrate with a sealing material, the first substrate, and the second substrate. And a liquid crystal layer provided in a space surrounded by the sealing material.

The present invention is preferably applied when the electro-optical panel generates an image for 3D display. In the present invention, the second heat conducting member can further suppress the thermal diffusion in the thickness direction of the first heat conducting member, and as a result, the temperature of the electro-optical panel and the temperature of the liquid crystal layer can be appropriately increased. For this reason, the responsiveness of the liquid crystal molecules used for the liquid crystal layer can be increased to a level corresponding to 3D display.

The present invention is preferably applied when the electro-optical panel generates an image of 480 frames per second. In the present invention, the second heat conducting member can further suppress the thermal diffusion in the thickness direction of the first heat conducting member, and as a result, the temperature of the electro-optical panel and the temperature of the liquid crystal layer can be appropriately increased. For this reason, the responsiveness of the liquid crystal molecules used for the liquid crystal layer can be increased to a level corresponding to display at 480 frames per second (8 × speed).

  The present invention may be applied when the electro-optical panel generates a still image.

The electro-optical device according to the invention can be used in various electronic apparatuses. When the projection display device is configured as an electronic device, the electronic device includes a light source unit that emits light supplied to the electro-optical panel, and a projection optical system that projects light modulated by the electro-optical panel. ,have. In the case of a projection display device, as a result of strong light being supplied to the electro-optic panel, the temperature rise of the electro-optic device is large, but even if such a temperature change occurs, the electro-optic panel is stressed according to the present invention. Hard to join.

It is explanatory drawing which shows one form of the electro-optical panel etc. which were used for the electro-optical apparatus which concerns on Embodiment 1 of this invention. 1 is a perspective view showing an embodiment of an electro-optical device according to Embodiment 1 of the invention. 1 is an exploded perspective view showing an embodiment of an electro-optical device according to Embodiment 1 of the invention. 1 is a cross-sectional view showing an embodiment of an electro-optical device according to Embodiment 1 of the invention. It is explanatory drawing which shows typically the mode of the thermal radiation in an electro-optical apparatus. FIG. 6 is a cross-sectional view illustrating an embodiment of an electro-optical device according to Embodiment 2 of the invention. FIG. 6 is a cross-sectional view illustrating an embodiment of an electro-optical device according to Embodiment 3 of the invention. It is a schematic block diagram of an example of the projection type display apparatus (electronic device) to which this invention is applied.

Embodiments of the present invention will be described with reference to the drawings. In the following description, the case where the electro-optical device to which the present invention is applied has a reflective liquid crystal panel as the electro-optical panel will be mainly 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. In the following description, the directions that intersect each other in the in-plane direction of the electro-optical panel 40 are defined as the X direction and the Y direction, and the normal direction to the electro-optical panel 40 is defined as the Z direction. Further, in the Z direction, the light emission side (front surface side) is set as one side Z1, and the side opposite to the light emission side (back surface side) is set as the other side Z2.

[Embodiment 1]
(Configuration of electro-optical panel 40)
FIG. 1 shows an electro-optical panel 40 used in an electro-optical device 100 according to Embodiment 1 of the present invention.
1A and 1B are plan views of the electro-optical panel 40 as viewed from the second substrate (counter substrate) side together with the respective components, and FIG. It is -H 'sectional drawing. Note that. In FIG. 1A, illustration of the dustproof glass 57 is omitted.

As shown in FIG. 1, in the electro-optical device 100 of this embodiment, the electro-optical panel 40 includes a first substrate 51 (element substrate) and a second substrate 52 (counter substrate) that are sealed with a predetermined gap.
07 is pasted together. The first substrate 51 and the second substrate 52 are translucent substrates such as a quartz substrate and a glass substrate. In this embodiment, quartz substrates are 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 the first
A liquid crystal layer as the electro-optical layer 450 is held in a space surrounded by the sealant 407 between the substrate 51 and the second substrate 52. The sealing material 407 is provided in a frame shape along the outer edge of the second substrate 52. The sealing material 407 is a photo-curing adhesive, a thermosetting adhesive, or an adhesive having both photo-curing and thermosetting, and the distance between the two substrates is set to a predetermined value. Gap materials such as glass fiber or glass beads are blended.

In this embodiment, the first substrate 51 has a quadrangular shape, and end surfaces 511 and 512 are provided on each of the four sides.
513, 514. Similarly to the first substrate 51, the second substrate 52 is also rectangular.
End surfaces 521, 522, 523, and 524 are provided on each of the four sides. The first substrate 51 is larger in size than the second substrate 52, and the four end surfaces 511, 512, 513, 5,
14 are located outside the end surfaces 521, 522, 523, and 524 of the second substrate 52.
For this reason, the end surfaces of the electro-optical panel 40 of the present embodiment are the end surfaces 511, 512 of the first substrate 51,
513, 514.

A display area 40a that emits modulated light is provided as a square area in the approximate center of the electro-optical panel 40. Corresponding to this shape, the sealing material 407 is also provided in a substantially square shape. In the electro-optical panel 40, the end of the display area 40a and the end face of the electro-optical panel 40 (first
Between the end faces 511, 512, 513, 514) of the substrate 51, a square frame-shaped peripheral region 40 is provided.
c is provided.

The first substrate 51 has an end portion on the side where the end surface 514 is located (the end portion on one side Y1 in the Y-axis direction) protruding from the end surface 524 of the second substrate 52 from the other end portion. A data line driving circuit 401 and a plurality of terminals 402 are formed along the end face 514. A scanning line driving circuit 404 is formed on the first substrate 51 along the end faces 511 and 512. A flexible wiring board 40 i is connected to the terminal 402, and various potentials and various signals are input to the first board 51 through the flexible wiring board 40 i.

Of the first surface 51 a and the second surface 51 b of the first substrate 51, the first facing the second substrate 52.
On the surface 51a, pixel electrodes 405a and pixel transistors (switching elements / not shown) corresponding to the pixel electrodes 405a are formed in a matrix in the display region 40a.
An alignment film 416 is formed on the upper layer side of the pixel electrode 405a. The first substrate 5
In one first surface 51a, a dummy pixel electrode 405b that is formed simultaneously with the pixel electrode 405a is formed in a region inside the sealing material 407 in the peripheral region 40c.

Of the first surface 52 a and the second surface 52 b of the second substrate 52, the first facing the first substrate 51.
A translucent common electrode 421 is formed on the surface 52 a, and an alignment film 426 is formed on the common electrode 421. The alignment films 416 and 426 are made of polyimide or an inorganic alignment film. In this embodiment, the alignment films 416 and 426 are made of, for example, SiO _x (x <2), SiO ₂ , T
It consists of an obliquely deposited film (inorganic alignment film) such as iO ₂ , MgO, Al ₂ O ₃ , In ₂ O ₃ , Sb ₂ O ₃ , Ta ₂ O _5, etc. The negative nematic liquid crystal compound is tilted vertically aligned. Therefore, the electro-optical panel 40 operates in a normally black VA mode.

The common electrode 421 is formed across a plurality of pixels as a substantially entire surface of the second substrate 52 or as a plurality of strip-like electrodes. In this embodiment, the common electrode 421 is formed over a substantially entire surface of the second substrate 52. . On the first surface 52 a of the second substrate 52, the light shielding layer 40 is disposed below the common electrode 421.
8 is formed. The light shielding layer 408 is formed in a frame shape extending along the outer peripheral edge of the display area 40 a, and the display area 40 a is defined by the inner edge of the light shielding layer 408. The outer peripheral edge of the light shielding layer 408 is at a position with a gap between the inner peripheral edge of the sealing material 407 and
The light shielding layer 408 and the sealing material 407 are not covered. In the second substrate 52, a light shielding layer formed simultaneously with the light shielding layer 408 may be formed as a black matrix or a black stripe in a region overlapping with a region sandwiched between adjacent pixel electrodes 405a.

In the first substrate 51, an inter-substrate conduction electrode for electrically conducting between the first substrate 51 and the second substrate 52 in a region overlapping the corner portion of the second substrate 52 outside the sealing material 407. 4
09 is formed. An inter-substrate conductive material 409a containing conductive particles is disposed between the inter-substrate conductive electrode 409 and the second substrate 52, and the common electrode 421 of the second substrate 52 includes the inter-substrate conductive material 409a and the substrate. It is electrically connected to the first substrate 51 side via the inter-connection electrode 409. For this reason, a common potential is applied to the common electrode 421 from the first substrate 51 side. The sealing material 407 is provided along the outer peripheral edge of the second substrate 52 with substantially the same width dimension. However, the sealing material 407 is provided so as to pass through the inside avoiding the inter-substrate conduction electrode 409 in a region overlapping the corner portion of the second substrate 52.

(Configuration as a reflective LCD panel)
In this embodiment, the electro-optical panel 40 is a reflective liquid crystal panel. Therefore, the common electrode 421 is formed of a light-transmitting conductive film such as an ITO (Indium Tin Oxide) film or an IZO (Indium Zinc Oxide) film, and the pixel electrode 405a is formed of a reflective conductive film such as an aluminum film. ing. In such a reflective liquid crystal panel (electro-optical panel 40), the arrows L11, L
12, light incident from the second substrate 52 side is reflected on the first substrate 51 side and modulated while being emitted from the one surface 40 e side of the electro-optical panel 40 to display an image. For this reason, in the electro-optical panel 40, a transparent substrate such as a quartz substrate can be used for both the first substrate 51 and the second substrate 52. Further, a translucent substrate such as a quartz substrate can be used for the second substrate 52, and a semiconductor substrate such as a silicon substrate can be used for the first substrate 51. In this form,
A quartz substrate is used for both the first substrate 51 and the second substrate 52.

In the electro-optical panel 40 (reflective liquid crystal panel) configured as described above, the first surface 57 a of the translucent dust-proof glass 57 is attached to the second surface 52 b of the second substrate 52. Therefore, one surface 40e (front surface) of the electro-optical panel 40 is constituted by the second surface 57b of the dustproof glass 57, and
The other surface 40 f (back surface) of the electro-optical panel 40 is configured by the second surface 51 b of the first substrate 51.

Further, in the electro-optical device 100 of the present embodiment, a heat-dissipating grease layer 70, a first heat conductive member 71, and a second heat conductive member 72, which will be described later, are laminated on the other surface 40f of the electro-optical panel 40 in this order.

(Overall configuration of electro-optical device 100)
FIG. 2 is a perspective view showing an embodiment of the electro-optical device 100 according to Embodiment 1 of the present invention. FIG. 3 is an exploded perspective view showing one embodiment of the electro-optical device 100 according to Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view showing one form of the electro-optical device 100 according to Embodiment 1 of the present invention.

As shown in FIGS. 2 and 3, the electro-optical panel 40 is mounted on an electronic apparatus as an electro-optical device 100 (electro-optical module) supported by the holder 3 for the purpose of reinforcement or the like. Therefore, the electro-optical device 100 according to this embodiment includes the electro-optical panel 40, the holder 3 that holds the electro-optical panel 40 inside, and the parting member 8 that is attached to the light emission side of the holder 3. .

The holder 3 has a frame portion 31 surrounding the electro-optical panel 40 and an end plate portion 32 provided on the light emitting side. The end plate portion 32 has an opening 320 formed therein. In this embodiment, since the electro-optical panel 40 is rectangular, the frame portion 31 and the end plate portion 32 are formed in a rectangular frame shape. In the holder 3, the space defined by the frame portion 31 and the end plate portion 32 is a panel housing portion 30 in which the electro-optical panel 40 is housed. Accordingly, after the electro-optical panel 40 is accommodated inside the holder 3 (panel accommodating portion 30), the electro-optical panel 40 is fixed to the holder 3 by bonding between the inner wall of the frame portion 31 and the electro-optical panel 40 or the like. can do.
In this state, the second substrate 52 of the electro-optical panel 40 is located inside the opening 320 of the end plate portion 32.
Is located.

In the state where the electro-optical panel 40 is fixed to the inside of the holder 3, the other surface 40 f of the electro-optical panel 40 is open inside the frame portion 31 on the side opposite to the light emitting side, and the electro-optical panel 40. The other surface 40f is exposed. A substrate outlet 39 is formed on the side of the frame 31 where the flexible wiring substrate 40i is provided.

The holder 3 is made of resin or metal having a thermal expansion coefficient equivalent to that of the first substrate 51. In this embodiment, since the first substrate 51 is made of a quartz substrate, when the holder 3 is made of metal, the holder 3 is made of an alloy containing at least nickel and iron. For example, the holder 3 is made of a so-called Invar alloy (eg, 36Ni—Fe alloy, 42Ni—Fe alloy, etc.), 32Ni-5Co—Fe alloy, 29Ni-17Co—Fe alloy, or the like. Among these alloys, for example, the coefficient of linear expansion of 36Ni—Fe alloy is about 1.2 × 10 ⁻⁶ (/ ° C.
The linear expansion coefficient of the 32Ni-5Co-Fe alloy is about 0.1 × 10 ⁻⁶ (/ ° C.), and the linear expansion coefficient of the first substrate 51 (quartz substrate) (about 0.48 × 10 ⁻⁶ (/ ° C.)).

The parting member 8 has a light shielding plate portion 81 that overlaps the end plate portion 32 of the holder 3 on the opposite side to the electro-optical panel 40. In the light shielding plate portion 81, the display area 40 a of the electro-optical panel 40 A rectangular opening 810 is formed in the overlapping region. The parting member 8 is made of resin or metal. In the parting member 8, the light shielding plate 81 functions as a parting part for the display area 40a. In the parting member 8, a connecting plate portion 85 that overlaps the outer surface 310 of the frame portion 31 of the holder 3 extends from an edge located on both sides in the X direction, of the outer peripheral edge of the light shielding plate portion 81. An engagement hole 850 is formed in the connecting plate portion 85, and the outer surface 310 of the frame portion 31.
An engaging convex portion 315 that engages with the engaging hole 850 is formed. Therefore, the parting member 8
Is attached to the holder 3 via a connecting plate portion 85.

(Configuration of heat conduction member)
In the electro-optical device 100 of the present embodiment, the first heat conductive member 71 having higher thermal conductivity than the electro-optical panel 40 (the first substrate 51 and the second substrate 52) is stacked on the other surface 40f side of the electro-optical panel 40. Are arranged. The first heat conducting member 71 is made of a metal mainly composed of aluminum, copper, silver, gold or the like. In this embodiment, the first heat conducting member 71 has a thickness of several hundred μm to
It consists of an aluminum alloy with a thickness of several millimeters. Here, a heat radiation grease layer 70 is provided between the other surface 40 f side of the electro-optical panel 40 and the first heat conducting member 71.

Further, in the electro-optical device 100 of the present embodiment, the electro-optical panel 4 has a lower thermal conductivity than the first heat-conducting member 71 on the side opposite to the electro-optical panel 40 with respect to the first heat-conducting member 71.
A second heat conductive member 72 having a higher thermal conductivity than 0 (the first substrate 51 and the second substrate 52) is disposed in an overlapping manner. The second heat conducting member 72 is made of a metal whose main component is iron, zinc, nickel or the like. In this embodiment, the second heat conducting member 72 is made of an iron alloy having a thickness of several hundred μm to several mm. .

Here, the first heat conducting member 71 and the second heat conducting member 72 are laminated by a method such as bonding or adhesion to constitute the heat sink 7. The heat sink 7 has the same planar size as the holder 3 and is fixed to the holder 3 by a method such as adhesion. In this state, the heat sink 7 overlaps the entire surface of the electro-optical panel 40 on the other surface 40f side (first substrate 51).

(Operation and main effect of this form)
FIG. 5 is an explanatory diagram schematically showing the state of heat dissipation in the electro-optical device, and FIG.
FIG. 5B is an explanatory diagram illustrating a heat dissipation state in the electro-optical device 100 to which the present invention is applied, and an explanatory diagram illustrating a heat dissipation state in the electro-optical device according to the reference example. FIG. 5 (a)
Then, the isotherm is indicated by a dotted line, and the heat radiation is indicated by arrows S1 and S2.

When the electro-optical device 100 according to this embodiment is mounted on a projection display device to be described later, a light beam hitting the vicinity of the center of the electro-optical panel 40 is strong, while the peripheral portion easily dissipates heat to the surroundings.
As shown to (a), the center part 40h of the electro-optical panel 40 becomes comparatively high temperature.

For this reason, as shown by the arrow S2, in the electro-optical panel 40, heat is transmitted from the central portion 40h to the peripheral portion, but the first substrate 51 and the second substrate 52 used in the electro-optical panel 40 are quartz substrates. Therefore, thermal conductivity is low as compared with a silicon substrate or the like.

Here, the first heat conductive member 71 is overlapped with the other surface 40f side of the electro-optical panel 40 via the heat dissipation grease layer 70, and the first heat conductive member 71 is more thermally conductive than the electro-optical panel 40. high. Accordingly, as indicated by the arrow S <b> 1, the heat of the electro-optical panel 40 is first transmitted to the first heat conducting member 71 through the heat dissipation grease layer 70. Accordingly, it is possible to prevent the temperature of the electro-optical panel 40 from rising excessively. In this embodiment, since the heat radiation grease layer 70 is provided between the electro-optical panel 40 and the first heat conducting member 71 and no air layer is interposed, the heat from the electro-optic panel 40 to the first heat conducting member 71 is reduced. Diffusion is smooth.

Further, in the first heat conductive member 71 having high heat conductivity, heat diffusion in the thickness direction is stronger than in the in-plane direction, but on the side opposite to the electro-optical panel 40 with respect to the first heat conductive member 71, A second heat conducting member 72 having a lower thermal conductivity than the first heat conducting member 71 is provided. For this reason, in the 1st heat conductive member 71, as a result of suppressing the thermal diffusion to thickness direction, as shown by arrow S2, the thermal diffusion to an in-plane direction becomes strong. Therefore, the temperature variation in the surface of the electro-optical panel 40 can be reduced as compared with the reference example shown in FIG. Therefore, the amount of thermal expansion of the electro-optical panel 40 is unlikely to vary in the plane, so that a large stress is not easily applied to the electro-optical panel 40. Therefore, since the deformation of the electro-optical panel 40 can be suppressed, it is possible to avoid a deterioration in display quality due to variations in the phase difference of the liquid crystal layer used in the electro-optical layer 450.

In the present embodiment, since the heat radiation from the first heat conduction member 71 to the outside is suppressed by the second heat conduction member 72, the temperature of the electro-optic panel 40 rises to an appropriate temperature, and the electro-optic panel 40. In-plane temperature variation is small. Therefore, in the entire electro-optical panel 40, the temperature of the liquid crystal layer used for the electro-optical layer 450 can be raised to an appropriate temperature, so that the response of liquid crystal molecules is high.

Therefore, the electro-optical panel 40 according to this embodiment is suitable for generating an image for 3D display that needs to alternately generate a left-eye image and a right-eye image at a high speed. Further, the electro-optical panel 40 according to the present embodiment is suitable for displaying an image with a driving method of 8 × speed or higher, such as generating an image of 480 frames or more per second. Further, the electro-optical panel 40 of the present embodiment is also suitable for generating a still image.

[Embodiment 2]
FIG. 6 is a cross-sectional view showing an embodiment of the electro-optical device 100 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 FIG. 6, also in the electro-optical device 100 of the present embodiment, the electro-optical panel 40 (the first substrate 51 and the second substrate 51) is disposed on the other surface 40f side of the electro-optical panel 40 as in the first embodiment.
A first heat conducting member 71 having a higher thermal conductivity than the substrate 52) is disposed in an overlapping manner. The first heat conducting member 71 is made of a metal mainly composed of aluminum, copper, silver, gold or the like. In this embodiment, the first heat conducting member 71 is an aluminum alloy having a thickness of several hundreds μm to several mm. Consists of. Here, a heat radiation grease layer 70 is provided between the other surface 40 f side of the electro-optical panel 40 and the first heat conducting member 71.

Further, on the side opposite to the electro-optical panel 40 with respect to the first heat conducting member 71, the thermal conductivity is lower than that of the first heat conducting member 71, and the electro-optical panel 40 (the first substrate 51 and the second substrate 52 is included). )
The second heat conductive member 72 having higher heat conductivity is disposed so as to overlap. The second heat conducting member 72 is made of a metal whose main component is iron, zinc, nickel or the like. In this embodiment, the second heat conducting member 72 is made of an iron alloy having a thickness of several hundred μm to several mm. .

Further, in the electro-optical device 100 of the present embodiment, the third heat conductive member having higher thermal conductivity than the second heat conductive member 72 is located on the opposite side of the second heat conductive member 71 with respect to the second heat conductive member 72. 73
Are arranged in layers. The third heat conducting member 73 is made of a metal mainly composed of aluminum, copper, silver, gold, etc., a high heat conducting ceramic, sapphire, crystal, or the like.
The heat conducting member 73 is made of an aluminum alloy having a thickness of several hundred μm to several mm.

Here, the first heat conductive member 71 and the second heat conductive member 72 are laminated by a method such as bonding or adhesion, and the second heat conductive member 72 and the third heat conductive member 73 are bonded or bonded. It is laminated by the method. Therefore, the 1st heat conductive member 71, the 2nd heat conductive member 72, and the 3rd heat conductive member 73 comprise the heat sink 7 by which they were laminated | stacked. The heat sink 7 has the same planar size as the holder 3 and is fixed to the holder 3 by a method such as adhesion. In this state, the heat sink 7 overlaps the entire surface of the electro-optical panel 40 on the other surface 40f side (first substrate 51).

Also in the electro-optical device 100 configured as described above, as in the first embodiment, the thermal conductivity of the first heat conductive member 71 is opposite to that of the first heat conductive member 71 on the side opposite to the electro-optical panel 40. A low second heat conducting member 72 is provided. For this reason, in the first heat conducting member 71, the thermal diffusion in the thickness direction is suppressed. As a result, the thermal diffusion in the in-plane direction is strengthened.
The temperature variation in the plane can be reduced. Further, by the second heat conducting member 72,
Since heat radiation from the first heat conducting member 71 to the outside is suppressed, the temperature of the electro-optical panel 40 rises to an appropriate temperature, and the temperature variation within the surface of the electro-optical panel 40 is small. The same effect as 1 is produced.

In this embodiment, the third heat conductive member 73 that overlaps the second heat conductive member 72 on the side opposite to the first heat conductive member 71 has higher thermal conductivity than the second heat conductive member 72. Therefore, the heat of the second heat conducting member 72 can be released smoothly through the third heat conducting member 73. Therefore,
An excessive temperature rise of the electro-optical panel 40 can be suppressed.

[Embodiment 3]
FIG. 7 is a cross-sectional view showing one form of the electro-optical device 100 according to Embodiment 3 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 FIG. 7, also in the electro-optical device 100 of this embodiment, the electro-optical panel 40 (the first substrate 51 and the second substrate 51) is disposed on the other surface 40f side of the electro-optical panel 40 as in the first embodiment.
A first heat conducting member 71 having a higher thermal conductivity than the substrate 52) is disposed in an overlapping manner. The first heat conducting member 71 is made of a metal mainly composed of aluminum, copper, silver, gold or the like. In this embodiment, the first heat conducting member 71 is an aluminum alloy having a thickness of several hundreds μm to several mm. Consists of. Here, a heat radiation grease layer 70 is provided between the other surface 40 f side of the electro-optical panel 40 and the first heat conducting member 71.

Further, on the side opposite to the electro-optical panel 40 with respect to the first heat conducting member 71, the thermal conductivity is lower than that of the first heat conducting member 71, and the electro-optical panel 40 (the first substrate 51 and the second substrate 52 is included). )
The second heat conductive member 72 having higher heat conductivity is disposed so as to overlap. The second heat conducting member 72 is made of a metal whose main component is iron, zinc, nickel or the like. In this embodiment, the second heat conducting member 72 is made of an iron alloy having a thickness of several hundred μm to several mm. .

Further, in the electro-optical device 100 according to the present embodiment, the third heat conductive member having a lower thermal conductivity than the second heat conductive member 72 is located on the opposite side of the second heat conductive member 71 with respect to the second heat conductive member 72. 74
Are arranged in layers. The third heat conducting member 74 is made of a metal mainly composed of iron, zinc, nickel or the like, polymer, glass, or low heat conducting ceramic. In this embodiment, the third heat conducting member 74 has a thickness of several hundreds. It consists of glass with a thickness of μm to several mm. The third heat conducting member 74 is made of a material having higher thermal conductivity than the electro-optical panel 40 (first substrate 51 and second substrate 52), or the electro-optical panel 40 (first substrate 51 and second substrate). 52) A material having lower thermal conductivity can be used.

Here, the first heat conductive member 71 and the second heat conductive member 72 are laminated by a method such as bonding or bonding, and the second heat conductive member 72 and the third heat conductive member 74 are bonded or bonded. It is laminated by the method. Therefore, the 1st heat conductive member 71, the 2nd heat conductive member 72, and the 3rd heat conductive member 74 comprise the heat sink 7 by which they were laminated | stacked. The heat sink 7 has the same planar size as the holder 3 and is fixed to the holder 3 by a method such as adhesion. In this state, the heat sink 7 overlaps the entire surface of the electro-optical panel 40 on the other surface 40f side (first substrate 51).

Also in the electro-optical device 100 configured as described above, as in the first embodiment, the thermal conductivity of the first heat conductive member 71 is opposite to that of the first heat conductive member 71 on the side opposite to the electro-optical panel 40. A low second heat conducting member 72 is provided. For this reason, in the first heat conducting member 71, the thermal diffusion in the thickness direction is suppressed. As a result, the thermal diffusion in the in-plane direction is strengthened.
The temperature variation in the plane can be reduced. Further, by the second heat conducting member 72,
Since heat radiation from the first heat conducting member 71 to the outside is suppressed, the temperature of the electro-optical panel 40 rises to an appropriate temperature, and the temperature variation within the surface of the electro-optical panel 40 is small. The same effect as 1 is produced.

Further, in this embodiment, the third heat conductive member 74 that overlaps the second heat conductive member 72 on the side opposite to the first heat conductive member 71 has lower thermal conductivity than the second heat conductive member 72. Accordingly, the second heat conducting member 72 and the third heat conducting member 74 can further suppress the heat diffusion in the thickness direction in the first heat conducting member 71, so that the heat diffusion in the in-plane direction is strengthened. Accordingly, temperature variations in the surface of the electro-optical panel 40 can be reduced. In addition, since heat radiation to the outside from the first heat conducting member 71 and the second heat conducting member 72 is suppressed, the temperature of the electro-optic panel 40 rises to a temperature higher than that of the first embodiment, and the electro-optic panel 40. In-plane temperature variation is small. Therefore, in the entire electro-optical panel 40, the temperature of the liquid crystal layer used for the electro-optical layer 450 can be raised to an appropriate temperature, so that the response of liquid crystal molecules is high. Therefore, the electro-optical panel 40 of the present embodiment is suitable for generating an image for 3D display that needs to alternately generate a left-eye image and a right-eye image at a high speed. Further, the electro-optical panel 40 according to the present embodiment is suitable for displaying an image with a driving method of 8 × speed or higher, such as generating an image of 480 frames or more per second. Further, the electro-optical panel 40 of the present embodiment is also suitable for generating a still image.

[Other forms of electro-optical device]
In the above embodiment, the reflection type liquid crystal panel has been described as an example of the electro-optical panel 40. However, the present invention is not limited to this, and an organic electroluminescence display panel, a plasma display panel, an FED (Field Emission Display) is used. Panel, SED (Surface-Co
nduction Electron-Emitter Display) panel, LED (Light Emitting Diode) display panel,
The present invention may be applied to an electro-optical device using an electrophoretic display panel or the like.

[Example of mounting on electronic devices]
(Configuration example of a projection display device)
FIG. 8 is a schematic configuration diagram of an example of a projection display device (electronic apparatus) to which the present invention is applied. In the following description, three electro-optical devices 100 according to the above-described embodiment are used, and the electro-optical panels 40 of the three electro-optical devices 100 are respectively the red liquid crystal panel 100R and the green liquid crystal panel 1.
Used as 00G and blue liquid crystal panel 100B.

A projection display apparatus 1000 shown in FIG. 8 includes a light source unit 1021 that generates light source light, and a light source unit 1.
The color separation light guide optical system 1023 that separates the light source light emitted from 021 into three color lights of red light R, green light G, and blue light B, and each color emitted from the color separation light guide optical system 1023 And a light modulator 1025 illuminated by the light source light. In addition, the projection display device 1000
Includes a cross dichroic prism 1027 (combining optical system) that combines the image light of each color emitted from the light modulation unit 1025, and a projection optical system 1029 that projects the image light that has passed through the cross dichroic prism 1027 onto a screen (not shown). It has. In this embodiment, the plurality of electro-optical devices 100 (reflection type liquid crystal device) and the cross dichroic prism 1027 (light combining optical system) constituting the light modulation unit 1025 constitute an optical unit 1200.

In the projection display apparatus 1000, the light source unit 1021 includes a light source 1021a, a pair of fly-eye optical systems 1021d and 1021e, a polarization conversion member 1021g, and a superimposing lens 1021i. In the present embodiment, the light source unit 1021 includes a reflector 1021f having a paraboloid and emits parallel light. Fly's eye optical system 1021d, 10
21e is composed of a plurality of element lenses arranged in a matrix in a plane orthogonal to the system optical axis, and the light source light is divided by these element lenses to be individually condensed and diverged. The polarization conversion member 1021g converts the light source light emitted from the fly-eye optical system 1021e into, for example, only a p-polarized component parallel to the drawing, and supplies it to the optical path downstream optical system. The superimposing lens 1021i allows the plurality of electro-optical devices 100 provided in the light modulation unit 1025 to be uniformly superimposed and illuminated by appropriately converging the light source light that has passed through the polarization conversion member 1021g as a whole.

The color separation light guide optical system 1023 includes a cross dichroic mirror 1023a, a dichroic mirror 1023b, and reflection mirrors 1023j and 1023k. In the color separation light guide optical system 1023, the substantially white light source light from the light source unit 1021 enters the cross dichroic mirror 1023a. The red light R reflected by one of the first dichroic mirrors 1031a constituting the cross dichroic mirror 1023a is reflected by the reflecting mirror 1023j, passes through the dichroic mirror 1023b, and transmits the incident side polarizing plate 1037r and p-polarized light. The electro-optical device 100 (red liquid crystal panel 100 for red) remains p-polarized light via the wire grid polarizing plate 1032r that reflects s-polarized light and the optical compensation plate 1039r.
R).

Further, the green light G reflected by the first dichroic mirror 1031a is reflected by the reflection mirror 10.
23j, then reflected by the dichroic mirror 1023b, and incident-side polarizing plate 1037g, which transmits p-polarized light while reflecting s-polarized light.
032g and the optical compensator 1039g, the electro-optical device 100 (
The light enters the green liquid crystal panel 100G).

On the other hand, the blue light B reflected by the other second dichroic mirror 1031b constituting the cross dichroic mirror 1023a is reflected by the reflection mirror 1023k,
Incident-side polarizing plate 1037b transmits the p-polarized light while reflecting the s-polarized light through the wire grid polarizing plate 1032b and the optical compensation plate 1039b.
00 (incident on the blue liquid crystal panel 100B). Optical compensation plates 1039r, 1039
g and 1039b optically compensate the characteristics of the liquid crystal layer by adjusting the polarization state of the incident light and the outgoing light to the electro-optical device 100.

In the projection display apparatus 1000 configured as described above, the optical compensation plates 1039r and 1039g
Each of the three colors of light incident through 1039b is modulated in each electro-optical device 100. At this time, of the modulated light emitted from the electro-optical device 100, the s-polarized component light is reflected by the wire grid polarizers 1032r, 1032g, and 1032b, and the exit-side polarizer 1038 is reflected.
The light enters the cross dichroic prism 1027 through r, 1038 g, and 1038 b. The cross dichroic prism 1027 includes a first dielectric multilayer film 10 that intersects in an X shape.
27a and a second dielectric multilayer film 1027b are formed, and one first dielectric multilayer film 1 is formed.
027a reflects red light R, and the other second dielectric multilayer film 1027b reflects blue light B. Therefore, the three colors of light are combined by the cross dichroic prism 1027 and emitted to the projection optical system 1029. The projection optical system 1029 projects the color image light combined by the cross dichroic prism 1027 onto a screen (not shown) at a desired magnification.

(Other projection display devices)
For the projection display device, an LED light source that emits light of each color is used as the light source unit, and the color light emitted from the LED light source is supplied to another electro-optical device (liquid crystal device). It may be configured.

(Other electronic devices)
As for the electro-optical device 100 to which the present invention is applied, in addition to the electronic devices described above, mobile phones, personal digital assistants (PDAs), digital cameras, liquid crystal televisions, car navigation devices, video phones, POS terminals In addition, it may be used as a direct-view display device in an electronic device such as a device provided with a touch panel.

3 .. Holder 7. Heat sink 8. Parting member 40 40 Electro-optical panel 4
0a..Display area, 40e..One side of electro-optical panel, 40f..Other side of electro-optical panel, 51..First substrate, 52..Second substrate, 57..Dustproof glass, 70..Heat dissipation Grease layer, 71 .. First heat conduction member, 72 .. Second heat conduction member, 73, 74 .. Third heat conduction member, 450 .. Electro-optic layer, 100 .. Electro-optic device, 1000 .. Projection Type display, 10
21 .. Light source unit, 1029 .. Projection optical system

Claims (10)

An electro-optic panel that emits display light from one side;
The first is higher in thermal conductivity than the electro-optical panel and overlaps the other surface side of the electro-optical panel.
A heat conducting member;
The second heat conduction is lower than that of the first heat conduction member, higher than that of the electro-optic panel, and laminated on the opposite side of the electro-optic panel with respect to the first heat conduction member. A member,
An electro-optical device comprising: The electro-optical device according to claim 1, wherein the other surface side of the electro-optical panel is made of a quartz substrate or a glass substrate. The electro-optical device according to claim 1, further comprising a heat dissipation grease layer between the other surface side of the electro-optical panel and the first heat conducting member. The thermal conductivity of the second heat conducting member is higher than that of the second heat conducting member, and the third heat conducting member is laminated on the opposite side of the second heat conducting member from the first heat conducting member. The electro-optical device according to any one of 1 to 3. The thermal conductivity of the second heat conducting member is lower than that of the second heat conducting member, and the third heat conducting member is stacked on the opposite side of the second heat conducting member from the first heat conducting member. The electro-optical device according to any one of 1 to 3. The electro-optical panel includes a first substrate constituting the other surface side of the electro-optical panel, and the first substrate
A second substrate bonded to the substrate with a sealing material; and a liquid crystal layer provided in a space surrounded by the sealing material between the first substrate and the second substrate. The electro-optical device according to claim 1, wherein The electro-optical device according to claim 6, wherein the electro-optical panel generates an image for 3D display. The electro-optical device according to claim 6, wherein the electro-optical panel generates an image of 480 frames per second. The electro-optical device according to claim 6, wherein the electro-optical panel generates a still image. An electronic apparatus comprising the electro-optical device according to claim 1,
A light source unit for emitting light supplied to the electro-optical panel;
A projection optical system that projects light modulated by the electro-optical panel;
An electronic device characterized by comprising: