Electro-optical devices and electronic equipment

Abstract

To provide an electro-optical device that can reduce the possibility that substrates of a liquid crystal panel is curved due to shrinkage of an adhesive.SOLUTION: An electro-optical device 1 has: a first substrate 6; a second substrate 7 that is laminated on the first substrate 6; a liquid crystal layer 8 that is provided between the first substrate 6 and the second substrate 7; a third substrate 12 that is provided on the first substrate 6 on the opposite side of the liquid crystal layer 8; and a frame 2 that accommodates the first substrate 6, second substrate 7, and third substrate 12. The frame 2 has an opposite surface 2d that is opposite to a first surface 12a of the third substrate 12 on the opposite side of the liquid crystal layer 8 with an adhesive layer 16 therebetween. The third substrate 12 is larger than the first substrate 6. The frame 2 is bonded only to the third substrate 12 from among the first substrate 6, second substrate 7, and third substrate 12.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an electro-optical device and an electronic device. [Background technology]

[0002] Patent Document 1 discloses a projector equipped with a liquid crystal panel. According to this, dustproof glass is adhesively fixed to both sides of the liquid crystal panel. The projection lens of the projector is set so that the liquid crystal layer is focused on the screen. Even if dust adheres to the dustproof glass, the dust is projected onto the screen as a blurred image. The dustproof glass reduces the effect of dust on the projected image.

[0003] When the LCD panel is installed in the projector body, it is mounted on a frame to make it easier to adjust the position of the LCD panel. When adjusting the position of the LCD panel, the position of the frame is adjusted. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-366046 Summary of the Invention [Problem to be solved by the invention]

[0005] In Patent Document 1, the sides of the liquid crystal panel, the adhesive portion between the liquid crystal panel and the waterproof glass, and the sides of the waterproof glass are adhesively fixed to the frame. The adhesive shrinks as it hardens. The contraction of the adhesive causes the glass plate of the liquid crystal panel to bend. At this time, the thickness of the liquid crystal layer becomes thicker in parts. The stress applied by the adhesive decreases over time, so the thickness of the liquid crystal layer that was thicker in parts also decreases. Therefore, if display adjustments are made to the liquid crystal layer in a partially thickened state, the state of the liquid crystal panel may differ over time from when the adjustment was made, potentially reducing the display quality of electro-optical devices using the liquid crystal panel. Therefore, there is a need for an electro-optical device that can reduce the possibility of the glass plate of the liquid crystal panel bending due to adhesive contraction. [Means for solving the problem]

[0006] The electro-optical device has a first substrate, a second substrate bonded to the first substrate, a liquid crystal layer provided between the first substrate and the second substrate, a third substrate provided on the first substrate opposite the liquid crystal layer, and a frame that houses the first substrate, the second substrate, and the third substrate, wherein the frame has an opposing surface that faces a first surface of the third substrate opposite the liquid crystal layer via an adhesive layer, the third substrate being larger than the first substrate, and the frame being bonded to only the third substrate among the first substrate, the second substrate, and the third substrate.

[0007] The electro-optical device has a first substrate, a second substrate bonded to the first substrate, a liquid crystal layer provided between the first substrate and the second substrate, a third substrate provided on the first substrate opposite the liquid crystal layer, and a frame that houses the first substrate, the second substrate, and the third substrate, wherein the frame has an abutment surface that abuts against a second surface of the third substrate on the liquid crystal layer side, the third substrate is larger than the first substrate, and only the third substrate and the frame are adhered to each other.

[0008] The electro-optical device has a first substrate, a second substrate bonded to the first substrate, a liquid crystal layer provided between the first substrate and the second substrate, a third substrate provided on a third surface of the first substrate opposite the liquid crystal layer, and a frame that houses the first substrate, the second substrate, and the third substrate, wherein the frame has an abutment surface that abuts against the third surface, the abutment surface being between a side surface of the third substrate and a side surface of the first substrate, the third substrate being smaller than the first substrate, and only the side surfaces of the first substrate and the second substrate and the inner wall of the frame being adhered to each other.

[0009] The electronic device includes the electro-optical device described above. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic perspective view showing the configuration of an electro-optical device according to a first embodiment. [Figure 2] FIG. 1 is an exploded perspective view showing the configuration of an electro-optical device. [Figure 3] FIG. 1 is a schematic cross-sectional side view showing the configuration of an electro-optical device. [Figure 4] FIG. 10 is a schematic perspective view showing the configuration of an electro-optical device according to a second embodiment. [Figure 5] FIG. 1 is an exploded perspective view showing the configuration of an electro-optical device. [Figure 6] FIG. 1 is a schematic cross-sectional side view showing the configuration of an electro-optical device. [Figure 7] FIG. 10 is a schematic cross-sectional side view showing the configuration of an electro-optical device according to a third embodiment. [Figure 8] FIG. 10 is a schematic cross-sectional side view showing the configuration of an electro-optical device according to a fourth embodiment. [Figure 9] FIG. 10 is a schematic cross-sectional side view showing the configuration of an electro-optical device according to a fifth embodiment. [Figure 10] FIG. 1 is a schematic side view showing the configuration of an electro-optical device. [Figure 11] FIG. 13 is a schematic side view showing the configuration of an electro-optical device according to a sixth embodiment. [Figure 12] FIG. 13 is a schematic configuration diagram of a projection display device using an electro-optical device according to a seventh embodiment. [Figure 13] FIG. 10 is a schematic cross-sectional side view showing the configuration of an electro-optical device according to a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0011] First embodiment In this embodiment, characteristic examples of electro-optical devices will be described with reference to the drawings. An electro-optical device according to a first embodiment will be described with reference to FIGS. 1 to 3. As shown in FIG. 1, the electro-optical device 1 includes a rectangular frame 2. The thickness direction of the frame 2 is defined as the Z direction. In a plane perpendicular to the Z direction, one of the directions in which two sides of the frame 2 extend is defined as the X direction, and the other is defined as the Y direction. The X direction, Y direction, and Z direction are perpendicular to one another.

[0012] A liquid crystal panel unit 3 is housed inside the frame 2. A flexible printed wiring board 4 is electrically connected to the liquid crystal panel unit 3. The flexible printed wiring board 4 supplies various signals, such as image signals, to the liquid crystal panel unit 3. A lid portion 5 is disposed on the positive Z direction side of the frame 2. The lid portion 5 is frame-shaped and has a first opening 5a. The liquid crystal panel unit 3 is exposed from the first opening 5a.

[0013] The lid 5 has frame-shaped locking portions 5b on the Y-positive and Y-negative sides. The frame 2 has insertion protrusions 2a on the Y-positive and Y-negative sides. The insertion protrusions 2a are inserted into the locking portions 5b. The lid 5 is detachably fixed to the frame 2 by the insertion protrusions 2a and the locking portions 5b.

[0014] 2, the frame 2 has a second opening 2b. The liquid crystal panel unit 3 is exposed from the second opening 2b. The frame 2 has a notch 2c on the side surface facing the X positive direction. The flexible printed wiring board 4 is disposed in the notch 2c.

[0015] Fig. 3 is a cross-sectional view taken along line AA in Fig. 1. As shown in Fig. 3, the liquid crystal panel unit 3 of the electro-optical device 1 includes a first substrate 6, a second substrate 7, and a liquid crystal layer 8. The second substrate 7 is bonded to the first substrate 6 with a sealing member 9. The liquid crystal layer 8 is provided between the first substrate 6 and the second substrate 7. The liquid crystal layer 8 is sealed with the sealing member 9. The first substrate 6, the second substrate 7, the liquid crystal layer 8, the sealing member 9, etc. form a liquid crystal panel 11.

[0016] The first substrate 6 and the second substrate 7 each have a transparent electrode on the surface facing the liquid crystal layer 8. When a voltage is applied between the transparent electrodes, the arrangement of the liquid crystal molecules in the liquid crystal layer 8 changes. As a result, the polarization of light passing through the liquid crystal layer 8 is twisted. When light is viewed through a polarizing filter, the proportion of light that passes through the polarizing filter changes depending on how twisted the light is.

[0017] The liquid crystal panel unit 3 includes a liquid crystal panel 11, a third substrate 12, and a fourth substrate 13. The third substrate 12 and the fourth substrate 13 are called protective members or dustproof members. The third substrate 12 and the fourth substrate 13 prevent dust from adhering to the first substrate 6 and the second substrate 7. The first substrate 6, the second substrate 7, the third substrate 12, and the fourth substrate 13 are housed in the frame 2.

[0018] The third substrate 12 is provided on the first substrate 6 on the opposite side to the liquid crystal layer 8. The third substrate 12 is larger than the first substrate 6. The third substrate 12 is bonded to the first substrate 6 with a first adhesive .

[0019] The fourth substrate 13 is provided on the second substrate 7 on the opposite side to the liquid crystal layer 8. The fourth substrate 13 is bonded to the second substrate 7 with a second adhesive 15.

[0020] The third substrate 12 has a first surface 12a opposite to the liquid crystal layer 8. The frame 2 has an opposing surface 2d opposing the first surface 12a. The first surface 12a of the third substrate 12 and the opposing surface 2d of the frame 2 are bonded together by an adhesive layer 16. In other words, the frame 2 has the opposing surface 2d opposing the first surface 12a of the third substrate 12 with the adhesive layer 16 interposed therebetween.

[0021] The side surface 12b of the third substrate 12 and the inner wall 2e of the frame 2 are bonded to each other. Of the first substrate 6, the second substrate 7, and the third substrate 12, the frame 2 is bonded only to the third substrate 12.

[0022] According to this configuration, the frame 2 and the third substrate 12 are bonded and fixed by the adhesive layer 16. The portions of the third substrate 12 that protrude beyond the first substrate 6 are not bonded to the first substrate 6 by the adhesive layer 16 that secures them to the frame 2. This prevents the first and third substrates 6 and 12 from bending due to the adhesive layer 16 that secures them to the frame 2. By bonding the frame 2 and the third substrate 12 while positioning the third substrate 12 in the direction of gravity relative to the first substrate 6, the adhesive layer 16 that secures them to the frame 2 is prevented from flowing from the side surface 12b of the third substrate 12 to the side surface 6b of the first substrate 6. Therefore, the electro-optical device 1 can reduce the possibility of the first substrate 6 and the second substrate 7 of the liquid crystal panel 11 bending due to contraction of the adhesive layer 16 that secures them to the frame 2. This reduces the possibility of the thickness of the liquid crystal layer 8 changing partially, which reduces the possibility of a deterioration in the display quality of the electro-optical device 1 that uses the liquid crystal panel 11.

[0023] The direction in which light enters the electro-optical device 1 is not particularly limited, but in this embodiment, for example, light enters through the fourth substrate 13 and exits through the third substrate 12. In this case, the fourth substrate 13 is made of, for example, sapphire glass. The third substrate 12 is made of, for example, Neoceram (registered trademark). The first substrate 6 is made of, for example, a quartz substrate containing silicon oxide. The second substrate 7 is made of, for example, a quartz substrate. The first substrate 6 is an element substrate on which a plurality of thin film transistors are arranged. The second substrate 7 is an opposing substrate. Note that the first substrate 6 may be made of an opposing substrate, and the second substrate 7 may be made of an element substrate.

[0024] It is also possible to use a configuration in which the direction of incidence of light is reversed, with light entering from the third substrate 12 and exiting from the fourth substrate 13. At least one of the first substrate 6 and the second substrate 7 may be a glass substrate. Quartz may be used as the material for both the third substrate 12 and the fourth substrate 13. Alternatively, different materials such as sapphire glass, neoceram, and quartz may be used as the materials for the third substrate 12 and the fourth substrate 13.

[0025] The material of the lid portion 5 is preferably a metal with spring properties. In this embodiment, for example, the material of the lid portion 5 is stainless steel. The material of the frame 2 is preferably a resin. By using a resin, the frame 2 can be formed into a complex shape. Alternatively, the material of the frame 2 may be a metal.

[0026] The electro-optical device 1 is assembled as follows: First, the frame 2 is placed on the base of a dedicated jig. An adhesive that will form the adhesive layer 16 is applied to the frame 2 in areas facing the first surface 12a and side surface 12b of the third substrate 12. In this embodiment, for example, a silicone adhesive is used as the adhesive that will form the adhesive layer 16. A syringe is used to apply the adhesive. The trajectory of the syringe is controlled by a numerically controlled XY table or the like. Next, the liquid crystal panel unit 3 is placed inside the frame 2. A lid for the dedicated jig is placed in place, and the frame 2 and liquid crystal panel unit 3 are fixed in place. The adhesive is allowed to dry for approximately two hours. The adhesive is then heated and dried at approximately 70 degrees for approximately 15 minutes to solidify. The liquid crystal panel unit 3 and frame 2 are then removed from the dedicated jig. A lid portion 5 is then placed on the frame 2. This completes the electro-optical device 1. The adhesive may be applied to the third substrate 12 instead of the frame 2.

[0027] Comparative Example 13 includes a liquid crystal panel unit 22. The liquid crystal panel unit 22 includes the same liquid crystal panel 11 as in the first embodiment.

[0028] The liquid crystal panel unit 22 includes a third substrate 23 and a fourth substrate 24 in addition to the liquid crystal panel 11. The first substrate 6, the second substrate 7, the third substrate 23, and the fourth substrate 24 are housed in a frame 25.

[0029] The third substrate 23 is provided on the first substrate 6 on the side opposite to the liquid crystal layer 8. The third substrate 23 is bonded to the first substrate 6 with a first adhesive 14.

[0030] The fourth substrate 24 is provided on the second substrate 7 on the opposite side to the liquid crystal layer 8. The fourth substrate 24 is bonded to the second substrate 7 with a second adhesive 15.

[0031] A lid portion 5 is provided on the positive Z side of frame 25. A light-shielding frame 26 is provided on the negative Z side of frame 25. Light-shielding frame 26 prevents light from hitting the outer periphery of liquid crystal panel 11. Light-shielding frame 26 prevents stray light from entering the interior of liquid crystal panel 11. Light-shielding frame 26 is adhered to frame 25 with a third adhesive 27.

[0032] The first substrate 6, the second substrate 7, the third substrate 23, and the fourth substrate 24 are bonded to the frame 25 by the fourth adhesive 28. When the fourth adhesive 28 hardens, the fourth adhesive 28 contracts. At this time, a stress that causes the third substrate 23 to protrude in the negative Z direction is applied by the fourth adhesive 28. The first substrate 6 is pulled by the third substrate 23 and protrudes in the negative Z direction.

[0033] The fourth adhesive 28 applies stress to the fourth substrate 24, causing it to protrude in the positive Z direction. The second substrate 7 is pulled by the fourth substrate 24 and protrudes in the positive Z direction. The thickness of the liquid crystal layer 8 becomes thicker in the center than in the peripheral area. At this time, the liquid crystal panel 11 may become discolored. Furthermore, creep occurs over time, causing the shrinkage of the fourth adhesive 28 to decrease. At this time, the color of the liquid crystal panel 11 changes. In the liquid crystal panel 11 of the first embodiment, changes in the thickness of the liquid crystal layer 8 are suppressed, and therefore discoloration of the liquid crystal panel 11 is suppressed.

[0034] Second embodiment This embodiment differs from the first embodiment in that the shape of the frame 2 shown in Fig. 3 is different. Note that the same components as those in the first embodiment are given the same reference numerals, and redundant explanations will be omitted.

[0035] As shown in FIG. 4, the electro-optical device 31 has a rectangular frame 32. A liquid crystal panel unit 3 is housed inside the frame 32. A flexible printed wiring board 4 is electrically connected to the liquid crystal panel unit 3. The flexible printed wiring board 4 supplies various signals, such as image signals, to the liquid crystal panel unit 3. A lid portion 5 is disposed on the positive Z direction side of the frame 32. The lid portion 5 is frame-shaped and has a first opening 5a. The liquid crystal panel unit 3 is exposed from the first opening 5a.

[0036] The lid portion 5 has frame-shaped locking portions 5b on the Y-positive and Y-negative sides. The frame 32 has insertion protrusions 32a on the Y-positive and Y-negative sides. The insertion protrusions 32a are inserted into the locking portions 5b. The lid portion 5 is detachably fixed to the frame 32 by the insertion protrusions 32a and the locking portions 5b. A light-shielding frame 26 is provided on the Z-negative side of the frame 32. The thickness of the light-shielding frame 26 in the Z direction is thinner than that of the frame 2 of the first embodiment. Therefore, the third substrate 12 is more likely to be exposed to air flowing from the X and Y directions. This makes it easier for the liquid crystal panel unit 3 to be air-cooled.

[0037] 5, the frame 32 has a second opening 32b. The light-shielding frame 26 has a third opening 26b. The liquid crystal panel unit 3 is exposed from the second opening 32b and the third opening 26b. The frame 32 has a notch 32c on the side surface on the X positive direction side. The flexible printed wiring board 4 is disposed in the notch 32c.

[0038] Fig. 6 is a cross-sectional view taken along line BB in Fig. 4. As shown in Fig. 6, the liquid crystal panel unit 3 of the electro-optical device 31 includes a liquid crystal panel 11. The second substrate 7 is bonded to the first substrate 6 with a sealing member 9. The liquid crystal layer 8 is provided between the first substrate 6 and the second substrate 7. The liquid crystal layer 8 is sealed with the sealing member 9. The first substrate 6, the second substrate 7, the liquid crystal layer 8, the sealing member 9, etc. form the liquid crystal panel 11.

[0039] The liquid crystal panel unit 3 includes a liquid crystal panel 11, a third substrate 12, and a fourth substrate 13. The first substrate 6, the second substrate 7, the third substrate 12, and the fourth substrate 13 are housed in a frame 32.

[0040] The third substrate 12 is provided on the first substrate 6 on the opposite side to the liquid crystal layer 8. The third substrate 12 is larger than the first substrate 6. The third substrate 12 is bonded to the first substrate 6 with a first adhesive .

[0041] The third substrate 12 has a second surface 12c on the liquid crystal layer 8 side. The frame 32 has a protrusion 32f that protrudes from an inner wall 32e of the frame 32 toward the first substrate 6. The protrusion 32f has an abutment surface 32g that abuts against the second surface 12c of the third substrate 12 on the liquid crystal layer 8 side. Therefore, the frame 32 has the abutment surface 32g that abuts against the second surface 12c of the third substrate 12 on the liquid crystal layer 8 side.

[0042] Only the side surface 12b of the third substrate 12 and the inner wall 32e of the frame 32 are bonded to each other. Of the first substrate 6, the second substrate 7, and the third substrate 12, the frame 32 is bonded to only the third substrate 12.

[0043] According to this configuration, the frame 32 and the third substrate 12 are bonded and fixed by the adhesive layer 16. The portions of the third substrate 12 that protrude beyond the first substrate 6 are not bonded to the first substrate 6 by the adhesive layer 16 for fixing them to the frame 32. This prevents the first substrate 6 and the third substrate 12 from bending due to the adhesive layer 16 for fixing them to the frame 32. An abutting surface 32g is disposed between the side surface 12b of the third substrate 12 and the side surface 6b of the first substrate 6. The abutting surface 32g prevents the adhesive layer 16 for fixing the frame 32 from flowing from the side surface 12b of the third substrate 12 to the side surface 6b of the first substrate 6. Therefore, the electro-optical device 31 can reduce the possibility of the first substrate 6 or the second substrate 7 of the liquid crystal panel 11 bending due to contraction of the adhesive layer 16 for fixing the frame 32. This reduces the possibility of the thickness of the liquid crystal layer 8 changing partially, resulting in a reduction in the display quality of the electro-optical device 31 using the liquid crystal panel 11.

[0044] A light-shielding frame 26 is provided on the negative Z direction side of the frame 32. The light-shielding frame 26 prevents light from hitting the outer periphery of the liquid crystal panel 11. The light-shielding frame 26 prevents stray light from entering the interior of the liquid crystal panel 11. The light-shielding frame 26 is adhered to the frame 32.

[0045] The light-shielding frame 26 is preferably made of a metal that is easy to draw, and in this embodiment, for example, stainless steel is used as the material for the light-shielding frame 26.

[0046] The electro-optical device 31 is assembled as follows. First, an adhesive that will be the material for the adhesive layer 16 is applied to the frame 32 in a location facing the side surface 12b of the third substrate 12. Next, the liquid crystal panel unit 3 is placed inside the frame 32. A third adhesive 27 is applied to the outer wall 32j of the frame 32 or the inside of the light-shielding frame 26. Next, the light-shielding frame 26 is pressed into the frame 32 to assemble it. The liquid crystal panel unit 3, frame 32, and light-shielding frame 26 are heated and dried, and the adhesive that will be the material for the adhesive layer 16 and the third adhesive 27 are solidified. Next, the lid 5 is placed on the frame 32. This completes the electro-optical device 31.

[0047] Third embodiment This embodiment differs from the first embodiment in that the substrate corresponding to the third substrate 12 is smaller than the first substrate 6. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and redundant explanations will be omitted.

[0048] 7, a liquid crystal panel unit 37 of an electro-optical device 36 includes a liquid crystal panel 11. The configuration of the liquid crystal panel 11 is the same as that of the first embodiment.

[0049] The liquid crystal panel unit 37 includes a third substrate 38 and a fourth substrate 13 in addition to the liquid crystal panel 11. The first substrate 6, the second substrate 7, the third substrate 38 and the fourth substrate 13 are housed in a frame 39.

[0050] The third substrate 38 is provided on a third surface 6c of the first substrate 6 opposite to the liquid crystal layer 8. The third substrate 38 is smaller than the first substrate 6. The third substrate 38 is bonded to the first substrate 6 with a first adhesive 14.

[0051] The frame 39 has a protrusion 39f that protrudes from an inner wall 39e of the frame 39 toward the third substrate 38. The protrusion 39f has an abutment surface 39g that abuts against the third surface 6c of the first substrate 6. Therefore, the frame 39 has the abutment surface 39g that abuts against the third surface 6c of the first substrate 6. The abutment surface 39g is located between the side surface 38b of the third substrate 38 and the side surface 6b of the first substrate 6.

[0052] Only the side surface 6b of the first substrate 6, the side surface 7b of the second substrate 7, and the inner wall 39e of the frame 39 are bonded to one another with a fifth adhesive 41 as an adhesive.

[0053] According to this configuration, the frame 39 is adhesively fixed to the first substrate 6 and the second substrate 7. Because the side surface 38b of the third substrate 38, which is smaller than the first substrate 6, is not bonded to the first substrate 6 by the fifth adhesive 41, the first substrate 6 and the third substrate 38 are prevented from bending due to the fifth adhesive 41. An abutting surface 39g is disposed between the side surface 38b of the third substrate 38 and the side surface 6b of the first substrate 6. The abutting surface 39g between the frame 39 and the first substrate 6 prevents the fifth adhesive 41, which secures the frame 39 and the first substrate 6, from flowing from the side surface 6b of the first substrate 6 to the third substrate 38. Therefore, the electro-optical device 36 can reduce the possibility of the first substrate 6 or the second substrate 7 of the liquid crystal panel 11 bending due to contraction of the fifth adhesive 41, which secures the frame 39 to the first substrate 6 and the second substrate 7. As a result, the possibility of the thickness of the liquid crystal layer 8 changing partially and deteriorating the display quality of the electro-optical device 36 using the liquid crystal panel 11 can be reduced.

[0054] According to this configuration, the protrusion 39f protrudes toward the third substrate , so that the contact surface 39g can be disposed between the side surface 6b of the first substrate 6 and the side surface b of the third substrate .

[0055] The protrusion 39f has a recess 39h between the contact surface 39g and the inner wall 39e of the frame 39. With this configuration, even if the fifth adhesive 41 drips from between the first substrate 6, the second substrate 7, and the inner wall 39e of the frame 39, the recess 39h can receive the fifth adhesive 41, thereby preventing the fifth adhesive 41 from adhering to both the third surface 6c of the first substrate 6 and the side surface 38b of the third substrate 38.

[0056] A light-shielding frame 26 is provided on the negative Z direction side of frame 39. The light-shielding frame 26 prevents light from hitting the outer periphery of liquid crystal panel 11. The light-shielding frame 26 prevents stray light from entering the interior of liquid crystal panel 11. The light-shielding frame 26 is adhered to frame 39 with a third adhesive 27.

[0057] Fourth embodiment This embodiment differs from the third embodiment in that the shape of the convex portion 39f of the frame 39 is different. Note that the same components as those in the third embodiment are denoted by the same reference numerals, and redundant explanations will be omitted.

[0058] 8, the electro-optical device 44 includes a liquid crystal panel unit 37. The structure of the liquid crystal panel unit 37 is the same as that of the third embodiment.

[0059] The first substrate 6, the second substrate 7, the third substrate 38, and the fourth substrate 13 are housed in a frame 46. The frame 46 has a protrusion 46f that protrudes from an inner wall 46e of the frame 46 toward the third substrate 38. The protrusion 46f has an abutment surface 46g that abuts against the third surface 6c of the first substrate 6. Therefore, the frame 46 has the abutment surface 46g that abuts against the third surface 6c of the first substrate 6. The abutment surface 46g is located between the side surface 38b of the third substrate 38 and the side surface 6b of the first substrate 6.

[0060] Only the side surface 6 b of the first substrate 6 and the side surface 7 b of the second substrate 7 and the inner wall 46 e of the frame 46 are bonded to one another by the fifth adhesive 41 .

[0061] According to this configuration, an abutment surface 46g is disposed between the side surface 38b of the third substrate 38 and the side surface 6b of the first substrate 6. The abutment between the frame 46 and the first substrate 6 at the abutment surface 46g prevents the fifth adhesive 41 used to secure the frame 46 and the first substrate 6 from flowing from the side surface 6b of the first substrate 6 to the third substrate 38. Therefore, the electro-optical device 44 can reduce the possibility of the first substrate 6 or the second substrate 7 of the liquid crystal panel 11 bending due to contraction of the fifth adhesive 41 used to secure the frame 46 to the first substrate 6 and the second substrate 7. As a result, the possibility of the thickness of the liquid crystal layer 8 changing partially and deteriorating the display quality of the electro-optical device 44 using the liquid crystal panel 11 can be reduced.

[0062] According to this configuration, the protrusion 46f protrudes toward the third substrate , so that the contact surface 46g can be disposed between the side surface 6b of the first substrate 6 and the side surface b of the third substrate .

[0063] Fifth embodiment This embodiment differs from the third embodiment in that a through hole for injecting a fifth adhesive 41 is provided on the side surface of the part corresponding to the frame 39. Note that the same components as those in the third embodiment are denoted by the same reference numerals, and redundant explanations will be omitted.

[0064] 9, the electro-optical device 51 includes a liquid crystal panel unit 37 and a frame 52. The liquid crystal panel unit 37 is housed in the frame 52. The liquid crystal panel unit 37 and the frame 52 are bonded together with a fifth adhesive 41.

[0065] As shown in Figures 9 and 10, the frame 52 has through holes 52k that penetrate from the outer wall 52j to the inner wall 52e. The outer wall 52j side of the through holes 52k is an injection port 52m. The frame 52 has injection ports 52m for injecting the fifth adhesive 41. The injection ports 52m are provided on the outer wall 52j on the X negative direction side, the Y positive direction side, and the Y negative direction side. One injection port 52m is provided on each of the outer walls 52j on the three sides. It is preferable to set the injection ports 52m long within a range that maintains the strength of the frame 52. The fifth adhesive 41 can be injected over a wide area.

[0066] The frame 52 has a protrusion 52f that protrudes from an inner wall 52e of the frame 52 toward the third substrate 38. The protrusion 52f has a contact surface 52g that contacts the third surface 6c of the first substrate 6. The injection port 52m is provided on the second substrate 7 side of the contact surface 52g. The gel-like fifth adhesive 41 before solidification may be poured through the injection port 52m. At this time, the gel-like fifth adhesive 41 passes through the side surface 7b of the second substrate 7 and fills up to the side surface 6b of the first substrate 6.

[0067] According to this configuration, after the first substrate 6 and the second substrate 7 are placed inside the frame 52, the fifth adhesive 41 can be placed between the first substrate 6 and the second substrate 7 and the frame 52. Alternatively, the fifth adhesive 41 can be applied to the side surface 6 b of the first substrate 6 and the side surface 7 b of the second substrate 7, and then the first substrate 6 and the second substrate 7 can be placed inside the frame 52. Therefore, it is possible to select which step to perform first, between the step of applying the fifth adhesive 41 and the step of placing the first substrate 6 and the second substrate 7 inside the frame 52.

[0068] Sixth embodiment This embodiment differs from the fifth embodiment in that a plurality of through holes for injecting a fifth adhesive 41 are provided on the side surface of the frame 39. Note that the same components as those in the fifth embodiment are denoted by the same reference numerals, and redundant explanations will be omitted.

[0069] 11, the electro-optical device 55 includes a frame 56. The liquid crystal panel unit 37 is housed in the frame 56.

[0070] The frame 56 has through holes 56k that penetrate from the outer wall 56j to the inner wall. The outer wall 56j side of the through holes 56k is an injection port 56m. The gel-like fifth adhesive 41 may be injected through the injection ports 56m. The injection ports 56m are provided on the outer wall 56j on the X-negative side, the Y-positive side, and the Y-negative side. Two or more injection ports 56m are provided on each of the three outer walls 56j. It is preferable to set the injection ports 56m long within a range that maintains the strength of the frame 56. The fifth adhesive 41 can be injected over a wide area. By providing multiple injection ports 56m that are shorter than the injection port 52m of the fifth embodiment, the rigidity of the frame 56 can be increased. It is not necessary for all outer walls 56j to have multiple injection ports 56m. An outer wall 56j may have one injection port 56m.

[0071] Seventh embodiment An electronic device using any one of the electro-optical device 1, the electro-optical device 31, the electro-optical device 36, the electro-optical device 44, the electro-optical device 51, and the electro-optical device 55 according to the above-described embodiments will be described.

[0072] The projection display device 61 as an electronic device shown in Figure 12 is an example of an electronic device that uses any of the electro-optical device 1, electro-optical device 31, electro-optical device 36, electro-optical device 44, electro-optical device 51, and electro-optical device 55.

[0073] In a projection-type display device 61, any of the electro-optical devices 1, 31, 36, 44, 51, and 55 is used as a light valve, enabling high-quality display over a long period of time. As shown in FIG. 12, a lamp unit 62 having a white light source such as a halogen lamp is installed inside the projection-type display device 61. The projection light emitted from the lamp unit 62 is separated into three primary colors, red, green, and blue, by three mirrors 63 and two dichroic mirrors 64 arranged inside. In FIG. 12, red is indicated by "R," green is indicated by "G," and blue is indicated by "B." The separated projection light is guided to light valves 65r, 65g, and 65b corresponding to each primary color. Since blue light has a longer optical path than the other colors, red and green, it is guided through a relay lens system 69 including an entrance lens 66, a relay lens 67, and an exit lens 68 to prevent loss of blue light.

[0074] In the projection display device 61, the light valves 65r, 65g, and 65b have the same structure as any one of the electro-optical device 1, electro-optical device 31, electro-optical device 36, electro-optical device 44, electro-optical device 51, and electro-optical device 55. The light valves 65r, 65g, and 65b are each connected to a higher-level circuit within the projection display device 61 via a flexible printed wiring board 4. Image signals specifying the gradation levels of the red, green, and blue primary color components are supplied from an external higher-level circuit to the light valves 65r, 65g, and 65b, respectively. The light valves 65r, 65g, and 65b are driven by the image signals processed by the higher-level circuit within the projection display device 61. The light modulated by the light valves 65r, 65g, and 65b enters the dichroic prism 70 from three directions. The red and blue light is reflected at a 90-degree angle by the dichroic prism 70, while the green light is transmitted. After the images of the primary colors are synthesized by the dichroic prism 70, a color image is projected onto a screen 71 by a projection optical system composed of a group of projection lenses 72.

[0075] The projection display device may be configured to use LED (light emitting diode) light sources or the like that emit light of each color as the light source unit, and supply each color light emitted from the LED light source to a separate liquid crystal device. The pixels may be configured to use display elements such as DMD (Digital Micromirror Device).

[0076] The projection display device 61 includes any one of the electro-optical device 1, the electro-optical device 31, the electro-optical device 36, the electro-optical device 44, the electro-optical device 51, and the electro-optical device 55. According to this configuration, the projection display device 61 includes an electro-optical device that can reduce the possibility of a deterioration in the display quality of the liquid crystal panel unit 3. Therefore, the projection display device 61 can be a device that includes an electro-optical device that can reduce the possibility of a deterioration in display quality.

[0077] Eighth embodiment Electronic devices including the electro-optical device 1, the electro-optical device 31, the electro-optical device 36, the electro-optical device 44, the electro-optical device 51, and the electro-optical device 55 are not limited to the projection display device 61 of the seventh embodiment. For example, the electro-optical device 1, the electro-optical device 31, the electro-optical device 36, the electro-optical device 44, the electro-optical device 51, and the electro-optical device 55 may be used in electronic devices such as head-up displays, head-mounted displays, personal computers, digital still cameras, and liquid crystal televisions. [Explanation of symbols]

[0078] 1,21,31,36,44,51,55...electro-optical device, 2,25,32,39,46,52,56...frame, 2d...opposing surface, 2e,32e,39e,46e,52e...inner wall, 6...first substrate, 6b,7b,12b,38b...side surface, 6c...third surface, 7...second substrate, 8...liquid crystal layer, 12a...first surface, 12c...second surface, 12,23,38...third substrate, 16...adhesive layer, 32f,39f,46f,52f...convex portion, 32g,39g,46g,52g...contact surface, 39h...recess, 41...fifth adhesive as adhesive, 52m,56m...injection port, 61...projection display device as electronic device.

Claims

1. a first substrate; a second substrate bonded to the first substrate; a liquid crystal layer provided between the first substrate and the second substrate; a third substrate provided on the first substrate opposite to the liquid crystal layer; a frame that houses the first substrate, the second substrate, and the third substrate; The frame has a first protrusion protruding toward a side surface of the first substrate and a second protrusion protruding toward a side surface of the third substrate. a first side surface facing the first side surface via a first adhesive layer; the first convex portion has a first contact surface that contacts a second surface of the third substrate on the liquid crystal layer side, the third substrate is larger than the first substrate; an electro-optical device, characterized in that only the third substrate and the first side surface are bonded to each other; 。

2. An electro-optical device according to claim 1, a fourth substrate provided on the second substrate opposite to the liquid crystal layer; a second substrate abutting against the frame and a surface of the fourth substrate opposite to the second substrate; a lid portion having two abutment surfaces, The frame has a second side surface provided on the opposite side to the first side surface, and a front side surface provided from the second side surface. a second protrusion protruding from a side opposite to the first side surface, The cover portion extends along the second side surface and has a frame-shaped locking portion into which the second protrusion is inserted. An electro-optical device comprising:

3. An electro-optical device according to claim 2, a second contacting the frame and a surface of the third substrate opposite to the first substrate; a light-shielding frame having three contact surfaces; the light-shielding frame is bonded to the second side surface of the frame via a second adhesive layer; In the thickness direction of the third substrate, the thickness of the light-shielding frame is thinner than the thickness of the frame. An electro-optical device characterized by:

4. An electro-optical device according to claim 3, The electro-optical device is characterized in that the light-shielding frame is made of metal.

5. An electro-optical device according to any one of claims 1 to 4, Further comprising a flexible wiring substrate, The frame has a rectangular frame shape and is cut so as to overlap the flexible wiring board in a plan view. An electro-optical device having a notch.

6. An electronic device comprising the electro-optical device according to any one of claims 1 to 5. 。

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