JP4089216B2 - Liquid crystal panel module and projection device using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid crystal panel module suitable as a light valve for a projector or the like and a projection apparatus using the same.
[0002]
[Prior art]
The liquid crystal panel is configured by sealing liquid crystal between two substrates such as a glass substrate and a quartz substrate. In such a liquid crystal panel, for example, thin film transistors (hereinafter referred to as TFTs) are arranged in a matrix on one substrate, and a counter electrode is arranged on the other substrate and sealed between both substrates. An image can be displayed by converting the optical characteristics of the liquid crystal layer into an image signal.
[0003]
The TFT substrate on which the TFT is disposed and the counter substrate disposed to face the TFT substrate are manufactured separately. Both substrates are bonded together with high accuracy in the panel assembling process, and then liquid crystal is sealed therein.
[0004]
In the panel assembly process, first, an alignment film is formed on the opposing surfaces of the TFT substrate and the counter substrate manufactured in each substrate process, that is, on the surface in contact with the liquid crystal layer of the counter substrate and the TFT substrate, and then the rubbing process. Is done. Next, a seal portion serving as an adhesive is formed on the edge of one substrate. The TFT substrate and the counter substrate are bonded together using a seal portion, and are cured by pressure bonding while performing alignment. A part of the seal part is provided with a notch, and the liquid crystal is sealed through the notch.
[0005]
Some liquid crystal panels of this type are used as liquid crystal light valves for projectors and the like. In the projector, the image on the screen of the liquid crystal panel is enlarged and projected onto the screen. Therefore, when dust adheres to the screen of the liquid crystal panel, the display image is significantly degraded due to the dust. Therefore, in order to reduce the influence of dust and the like, the liquid crystal panel is generally housed in a case with dust-proof glass attached to the entrance surface and the exit surface. That is, the liquid crystal panel is used as a liquid crystal light valve of a projector or the like in a state of a liquid crystal panel module housed in a case together with dustproof glass.
[0006]
[Problems to be solved by the invention]
By the way, in such a liquid crystal panel module, a minute gap is formed between the inner wall of the panel storage chamber opened in the case and the liquid crystal panel. In this gap, generally, an elastic adhesive made of resin or the like is discontinuously embedded, and the liquid crystal panel is elastically fixed in the case via the adhesive, so that the liquid crystal panel is damaged. Is prevented. That is, the stress generated due to the difference in thermal expansion coefficient between the liquid crystal panel and the case is absorbed by the elastic adhesive in the gap formed between the inner wall of the panel storage chamber and the liquid crystal panel. It has come to be.
[0007]
However, when the liquid crystal panel is elastically fixed in the case, for example, when an external force of a predetermined level or more is applied to the flexible wiring board extended from the liquid crystal panel, the liquid crystal panel may be displaced from the initial position. is there. And when a projector etc. are comprised using the liquid crystal panel module from which the liquid crystal panel shifted | deviated from the initial position in this way, there exists a possibility that exact projection display may become difficult.
[0008]
On the other hand, if the gap between the inner wall of the panel storage chamber and the liquid crystal panel is narrowed more than necessary, or the liquid crystal panel is fixed in the case with a hard adhesive, the liquid crystal panel will be damaged by stress caused by thermal expansion. There is a risk of damage.
[0009]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a liquid crystal panel module that can prevent damage to the liquid crystal panel and displacement from the case, and a projection device using the liquid crystal panel module.
[0010]
[Means for Solving the Problems]
The liquid crystal panel module according to the present invention has a case in which the panel storage chamber is opened, at least one side is in contact with the inner wall of the panel storage chamber, and at least two other continuous sides are inside the panel storage chamber. And a liquid crystal panel bonded and fixed in the case through an adhesive having elasticity while being separated from the wall.
[0011]
According to such a configuration, the liquid crystal panel has elasticity in a state where at least one side is in contact with the inner wall of the panel storage chamber and the other two continuous sides are separated from the inner wall of the panel storage chamber. Since it is bonded and fixed in the case via an adhesive, both prevention of breakage of the liquid crystal panel and prevention of positional displacement with respect to the case can be achieved.
[0012]
And a biasing means interposed between the inner side wall of the panel storage chamber and the liquid crystal panel, and biasing at least one side of the liquid crystal panel to the inner side wall of the panel storage chamber. To do.
[0013]
According to such a configuration, it is possible to more effectively realize the positional displacement prevention with respect to the case of the liquid crystal panel.
[0014]
Further, the liquid crystal panel is characterized in that at least one side is in contact with the inner wall of the panel storage chamber through a dustproof glass adhered to the surface.
[0015]
According to such a configuration, it is possible to achieve both prevention of damage to the liquid crystal panel and prevention of positional displacement with respect to the case.
[0016]
And a biasing means interposed between the inner side wall of the panel storage chamber and the dustproof glass, and biasing at least one side of the dustproof glass toward the inner side wall of the panel storage chamber. To do.
[0017]
According to such a configuration, it is possible to more effectively realize the positional displacement prevention with respect to the case of the liquid crystal panel.
[0018]
The biasing means is a spring portion integrally formed with a hook that is hooked on the case and closes the panel storage chamber.
[0019]
According to such a configuration, it is possible to more effectively realize the positional displacement prevention with respect to the case of the liquid crystal panel.
[0020]
The biasing means is a spacer having elasticity.
[0021]
According to such a configuration, it is possible to more effectively realize the positional displacement prevention with respect to the case of the liquid crystal panel.
[0022]
A projection apparatus according to the present invention uses the liquid crystal panel module.
[0023]
According to such a configuration, the liquid crystal panel can be prevented from being damaged or displaced from the case, so that the life of the liquid crystal panel module can be extended and the life of the entire projection apparatus can be increased. .
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 6 relate to the first embodiment of the present invention, FIG. 1 is an explanatory diagram showing a liquid crystal panel module, and FIG. 2 shows various elements, wirings, etc. in a plurality of pixels constituting the pixel region of the liquid crystal panel. 3 is an equivalent circuit diagram, FIG. 3 is a plan view of an element substrate such as a TFT substrate as viewed from the counter substrate side together with each component formed thereon, and FIG. 4 is a view in which the element substrate and the counter substrate are bonded together to enclose liquid crystal FIG. 5 is a cross-sectional view showing the liquid crystal panel after being assembled at a position cut along the line HH ′ in FIG. 3, FIG. 5 is a cross-sectional view showing the liquid crystal panel in detail, and FIG. 6 is a flowchart showing the panel assembly process. .
[0025]
First, the structure of the liquid crystal panel will be described with reference to FIGS.
[0026]
As shown in FIGS. 3 and 4, the liquid crystal panel is configured by sealing a liquid crystal 50 between an element substrate 10 such as a TFT substrate and a counter substrate 20. On the element substrate 10, pixel electrodes and the like constituting pixels are arranged in a matrix. FIG. 2 shows an equivalent circuit of elements on the element substrate 10 constituting the pixel.
[0027]
As shown in FIG. 2, in the pixel region, a plurality of scanning lines 3a and a plurality of data lines 6a are wired so as to cross each other, and a pixel electrode is formed in a region partitioned by the scanning lines 3a and the data lines 6a. 9a are arranged in a matrix. A TFT 30 is provided corresponding to each intersection of the scanning line 3a and the data line 6a, and a pixel electrode 9a is connected to the TFT 30.
[0028]
The TFT 30 is turned on by the ON signal of the scanning line 3a, whereby the pixel signal supplied to the data line 6a is supplied to the pixel electrode 9a. A voltage between the pixel electrode 9 a and the counter electrode 21 provided on the counter substrate 20 is applied to the liquid crystal 50. In addition, a storage capacitor 70 is provided in parallel with the pixel electrode 9a, and the storage capacitor 70 makes it possible to hold the voltage of the pixel electrode 9a for a time that is, for example, three orders of magnitude longer than the time when the source voltage is applied. The storage capacitor 70 improves the voltage holding characteristic and enables image display with a high contrast ratio.
[0029]
FIG. 5 is a schematic cross-sectional view of a liquid crystal panel focusing on one pixel.
[0030]
A groove 11 is formed in the element substrate 10 such as glass or quartz in order to suppress a step on the surface of the alignment film 16 when the element substrate is completed. A TFT 30 having an LDD structure is formed on the groove 11 with a light shielding film 12 and a first interlayer insulating film 13 interposed therebetween. The groove 11 flattens the boundary surface between the TFT substrate and the liquid crystal 50.
[0031]
The TFT 30 includes a scanning line 3a that forms a gate electrode through an insulating film 2 on a semiconductor layer in which a channel region 1a, a source region 1d, and a drain region 1e are formed. The light shielding film 12 is formed in a region corresponding to the formation region of the TFT 30, a formation region such as a data line 6a and a scanning line 3a described later, that is, a region corresponding to a non-display region of each pixel. The light shielding film 12 prevents reflected light from entering the channel region 1 a, the source region 1 d, and the drain region 1 e of the TFT 30.
[0032]
A second interlayer insulating film 14 is laminated on the TFT 30, and an intermediate conductive layer 15 is formed on the second interlayer insulating film 14. On the intermediate conductive layer 15, the capacitor line 18 is disposed opposite to the dielectric film 17. The capacitance line 18 includes a capacitance layer and a light shielding layer, and forms a storage capacitor with the intermediate conductive layer 15 and has a light shielding function for preventing internal reflection of light. The intermediate conductive layer 15 is formed at a position relatively close to the semiconductor layer, so that irregular reflection of light can be efficiently prevented.
[0033]
A third interlayer insulating film 19 is disposed on the capacitor line 18, and a data line 6 a is stacked on the third interlayer insulating film 19. The data line 6a is electrically connected to the source region 1d through contact holes 24a and 24b penetrating the third and second interlayer insulating films 19 and 14. A pixel electrode 9a is stacked on the data line 6a with a fourth interlayer insulating film 25 interposed therebetween. The pixel electrode 9a is electrically connected to the drain region 1e through the intermediate conductive layer 15 through contact holes 26a and 26b that penetrate the fourth, third, and second interlayer insulating films 25, 19, and 14. On the pixel electrode 9a, an alignment film 16 made of polyimide polymer resin is laminated and rubbed in a predetermined direction.
[0034]
When the ON signal is supplied to the scanning line 3a (gate electrode), the channel region 1a becomes conductive, the source region 1d and the drain region 1e are connected, and the image signal supplied to the data line 6a becomes the pixel electrode. 9a.
[0035]
On the other hand, the counter substrate 20 is provided with a first light-shielding film 23 in a region facing the data line 6a, scanning line 3a, and TFT 30 formation region of the TFT array substrate, that is, in a non-display region of each pixel. The first light shielding film 23 prevents incident light from the counter substrate 20 side from entering the channel region 1 a, the source region 1 d, and the drain region 1 e of the TFT 30. A counter electrode (common electrode) 21 is formed over the entire surface of the substrate 20 on the first light shielding film 23. An alignment film 22 made of a polyimide-based polymer resin is laminated on the counter electrode 21 and rubbed in a predetermined direction.
[0036]
A liquid crystal 50 is sealed between the element substrate 10 and the counter substrate 20. Thereby, the TFT 30 writes the image signal supplied from the data line 6a to the pixel electrode 9a at a predetermined timing. The alignment state of the molecular assembly of the liquid crystal 50 changes according to the written potential difference between the pixel electrode 9a and the counter electrode 21 to modulate light and enable gradation display.
[0037]
As shown in FIGS. 3 and 4, the counter substrate 20 is provided with a light shielding film 42 as a frame for partitioning the display area. The light shielding film 42 is formed of, for example, the same or different light shielding material as the light shielding film 23.
[0038]
A sealing material 41 that encloses liquid crystal in a region outside the light shielding film 42 is formed between the element substrate 10 and the counter substrate 20. The sealing material 41 is disposed so as to substantially match the contour shape of the counter substrate 20, and fixes the element substrate 10 and the counter substrate 20 to each other. The sealing material 41 is missing in a part of one side of the element substrate 10, and a liquid crystal injection port 78 for injecting the liquid crystal 50 is formed in the gap between the bonded element substrate 10 and the counter substrate 20. The After the liquid crystal is injected from the liquid crystal injection port 78, the liquid crystal injection port 78 is sealed with a sealing material 79.
[0039]
A data line driving circuit 61 and a mounting terminal 62 are provided along one side of the element substrate 10 in a region outside the sealing material 41 of the element substrate 10, and along two sides adjacent to the one side, A scanning line driving circuit 63 is provided. On the remaining one side of the element substrate 10, a plurality of wirings 64 are provided for connecting between the scanning line driving circuits 63 provided on both sides of the pixel display region. In addition, a conductive material 65 for electrically connecting the element substrate 10 and the counter substrate 20 is provided in at least one corner of the counter substrate 20.
[0040]
Next, the panel assembly process will be described with reference to FIG. The element substrate 10 (TFT substrate) and the counter substrate 20 are manufactured separately. In the next steps S2 and S7, polyimide (PI) to be the alignment films 16 and 22 is applied to the TFT substrate and the counter substrate 20 prepared in steps S1 and S6, respectively. Next, in steps S3 and S8, a rubbing process is performed on the alignment film 16 on the surface of the element substrate 10 and the alignment film 22 on the surface of the counter substrate 20.
[0041]
Next, in steps S4 and S9, a cleaning process is performed. This cleaning process is for removing dust generated by the rubbing process. When the cleaning process is completed, a sealing material 41 and a conductive material 65 (see FIG. 3) are formed in step S5. Next, in step S10, the element substrate 10 and the counter substrate 20 are bonded together, and in step S11, pressure bonding is performed while alignment is performed, and the sealing material 41 is cured. Finally, in step S12, liquid crystal is sealed from a notch provided in a part of the sealing material 41, and the notch is closed to seal the liquid crystal.
[0042]
The liquid crystal panel configured as described above is accommodated in the case 91 in a state where the flexible wiring board 99 is connected, thereby forming a liquid crystal panel module. 1A shows the top shape of the liquid crystal panel module, and FIG. 1B shows the cross-sectional shape.
[0043]
Hereinafter, the configuration of the liquid crystal panel module 155 will be specifically described. The liquid crystal panel 92 in FIG. 1 is the same as that in FIGS. 2 to 5 and is configured by bonding an element substrate 93 and a counter substrate 94 together. A flexible wiring board 99 is connected to the mounting terminals 62 (see FIG. 3) of the liquid crystal panel 92. The flexible wiring board 99 is configured by forming a copper foil pattern made of, for example, rolled copper foil on a base material such as a polyimide film, and further forming a cover material on the copper foil pattern. The copper foil patterns are juxtaposed along the longitudinal direction of the flexible wiring board 99. An ACF (not shown), which is an adhesive containing conductive particles, is formed in the width direction of the flexible wiring board 99, and the flexible wiring board 99 is pressure-bonded and fixed onto the element substrate 93 using this ACF.
[0044]
Further, dust-proof glasses 111 and 112 having substantially the same shape as these are attached to the surfaces of the element substrate 93 and the counter substrate 94 of the liquid crystal panel 92 through an adhesive (not shown), respectively.
[0045]
The case 91 is made of an injection molded product made of metal such as magnesium alloy or aluminum alloy. A panel storage chamber 120 for storing the liquid crystal panel 92 and the dustproof glasses 111 and 112 is opened on the upper surface of the case 91.
[0046]
A step portion is formed in the panel storage chamber 120, and a space on the bottom surface side surrounded by the step portion is formed as a first storage chamber 121 for storing the dust-proof glass 111 and the counter substrate 94. Is formed as a second storage chamber 122 for storing the element substrate 93 and the dust-proof glass 112. Here, the inner circumference of the first storage chamber 121 is formed larger than the outer circumferences of the dust-proof glass 111 and the counter substrate 94. The inner circumference of the second storage chamber 122 is formed larger than the outer circumferences of the element substrate 93 and the dust-proof glass 112.
[0047]
An elastic adhesive (not shown) made of, for example, a resin material is embedded in the inner side wall 122a of the second storage chamber 122, and the liquid crystal panel 92 is bonded and fixed to the case 91 via this adhesive. Yes. In the present embodiment, specifically, the element substrate 93 is bonded and fixed to the second storage chamber 122 with four side walls 93a spaced from the inner side wall 122a. In the counter substrate 94, the side wall 94a on one side located on the flexible wiring board 99 side is in contact with the inner side wall 121a and the side walls 94a on the other side are separated from the inner side wall 121a. The first storage chamber 121 is bonded and fixed. Further, the dust-proof glass 111 is bonded and fixed to the counter substrate 94 with the four side walls 111a being separated from the inner side wall 121a. The dust-proof glass 112 is bonded and fixed to the element substrate 93 with the four side walls 112a being spaced apart from the inner side wall 122a. In other words, the liquid crystal panel 92 has an elastic adhesive in a state where one side is in contact with the inner wall of the panel storage chamber 120 and the other three sides are separated from the inner wall of the panel storage chamber 120. The case 91 is adhesively fixed.
[0048]
In addition, an opening 88 that communicates between the panel storage chamber 120 and the outside is formed on the bottom surface of the case 91 so as to correspond to the effective display area of the liquid crystal panel 92, and the dust-proof glass 111 is placed through the opening 88. 91 is exposed to the outside. Further, on the upper surface of the case 91, a step portion 117 communicating with the panel storage chamber 120 is provided at a position corresponding to the flexible wiring substrate 99, and the flexible wiring substrate 99 is not bent by the step portion 117. 91 is constructed inside and outside. Furthermore, a pair of hooking pieces 124 for hooking hooks 113 (described later) that close the panel storage chamber 120 from the upper surface side are provided on the outer surface of the case 91.
[0049]
The hook 113 is made of a sheet metal member, for example, and has an opening 123 corresponding to the effective display area of the element substrate 93. A pair of latching claws 125 corresponding to the latching piece 124 of the case 91 are extended from the side of the hook 113 to the case 91 side, and the latching claws 125 are latched on the latching piece 124. Thus, the hook 113 is hooked on the case 91 in a state where the panel storage chamber 120 is closed.
[0050]
Here, the hook 113 has a function of holding the liquid crystal panel 92 in a predetermined position in the panel storage chamber 120 until the adhesive for bonding and fixing the case 91 and the liquid crystal panel 92 is solidified. . Therefore, the hook 113 is provided with a panel pressing portion 126 that slightly protrudes toward the case 91 by bending, and when the hook 113 is hooked on the case 91, the panel pressing portion 126 causes the liquid crystal panel 92 to be The dust-proof glass 112 is elastically pressed with a relatively weak pressing force. The relatively weak pressing force is a pressing force that does not cause uneven display on the liquid crystal panel 92.
[0051]
In addition, a spring portion 127 as an urging means is integrally formed on the hook 113 by bending to a side portion facing the side portion on the flexible wiring board 99 side. The spring portion 127 is desired in the panel storage chamber 120 and is in elastic contact with the element substrate 93 in the panel storage chamber 120. The counter substrate 94 is urged by the urging force of the spring portion 127 such that one side wall 94 a located on the flexible wiring board 99 side is urged to the inner wall 121 a of the first storage chamber 121.
[0052]
Next, an assembly process of the liquid crystal panel module 155 will be described.
[0053]
First, an elastic adhesive made of a resin material or the like is applied to the inner wall 122a of the case 91. Next, the dust-proof glass 111 is stored in the first storage chamber 121 in a state where the four side walls 111 a are positioned so as to be spaced apart from the inner wall 121 a by a predetermined distance.
[0054]
Next, an adhesive is applied to the upper surface of the dust-proof glass 111, and the liquid crystal panel 92 is superimposed on the upper surface of the dust-proof glass 111 to which the adhesive is applied. In this case, in the liquid crystal panel 92, one side wall 94a located on the flexible wiring board 99 side of the counter substrate 94 is in contact with the inner side wall 121a and the other three sides are spaced apart from the inner side wall 121a by a predetermined distance. The element substrate 93 is housed from the first storage chamber 121 to the second storage chamber 122 in a state where the four side walls 93a are positioned so as to be spaced apart from the inner wall 122a.
[0055]
Next, an adhesive is applied to the upper surface of the element substrate 93, and the dust-proof glass 112 is superimposed on the upper surface of the element substrate 93 to which the adhesive is applied. In this case, the dust-proof glass 112 is stored in the second storage chamber 122 in a state where the four side walls 112a are positioned so as to be spaced apart from the inner side wall 122a.
[0056]
Finally, the hook 113 is hooked on the case 91, and in this state, the adhesive is solidified. At this time, the liquid crystal panel 92 and the dust-proof glasses 111 and 112 are pressed against the bottom surface side of the case 91 by the pressing portion 126 provided on the hook 113, so that the respective members are held at predetermined positions in the case 91. In this case, in particular, the element substrate 93 is urged toward the flexible wiring board 99 by the spring portion 127 provided on the hook 113, and one side wall located on the flexible wiring board 99 side of the counter substrate 94 by this urging force. Since 94a is urged by the inner wall 121a, the contact between the one side wall 94a and the inner wall 121a is firmly held.
[0057]
According to such an embodiment, the liquid crystal panel 92 is bonded and fixed in the case 91 in a state where the side wall 94a of one side of the counter substrate 94 is in contact with the inner wall 121a of the first storage chamber 121. Therefore, even when an external force of a predetermined level or more is applied to the flexible wiring board 99 when the liquid crystal panel module 155 is used, it is possible to prevent the liquid crystal panel 92 from being displaced from the initial position.
[0058]
In this case, the side wall 94a of the counter substrate 94 that is in contact with the inner side wall 121a is set to one side located on the flexible wiring board 99 side, thereby preventing the deviation from the initial position of the liquid crystal panel 92 more effectively. be able to. Further, even if a minute shift occurs at the position where the liquid crystal panel 92 is disposed, it can be restored to the original position by the urging force of the spring portion 127. Can maintain a good arrangement.
[0059]
Further, the other three side walls 94a of the counter substrate 94, the four side walls 93a of the element substrate 93, and the four side walls 111a and 112a of the dust-proof glasses 111 and 112 are separated from the inner side walls 121a and 122a. Since the panel 92 (and the dust-proof glass 111, 112) is configured to be bonded and fixed via an elastic adhesive in a state where contact with the case 91 is minimized, the case 91 and the liquid crystal panel 92 It is possible to prevent the liquid crystal panel 92 (and the dust-proof glasses 111 and 112) from being damaged due to the difference in the coefficient of thermal expansion.
[0060]
Further, bringing the side wall 94a on one side of the counter substrate 94 into contact with the inner wall 121a of the panel storage chamber 120 facilitates the positioning of the liquid crystal panel 92 with respect to the case 91 in the assembly process of the liquid crystal panel module 155, thereby increasing the positioning accuracy. Can be improved.
[0061]
Further, by urging the liquid crystal panel 92 toward the side wall 94a on one side by the spring portion 127, it is possible to prevent the liquid crystal panel 92 from being displaced from a predetermined position until the adhesive is solidified.
[0062]
Further, since the spring portion 127 is integrally formed with the hook 113, the liquid crystal panel 92 can be urged in a predetermined direction without increasing the number of components.
[0063]
FIG. 7 is an explanatory view showing a second embodiment of the present invention. In FIG. 7, the same components as those in FIG.
[0064]
In the present embodiment, an elastic adhesive (not shown) made of, for example, a resin material is embedded in the inner side wall 122a of the second storage chamber 122, and the liquid crystal panel 92 is placed in the case through this adhesive. 91 is adhered and fixed. Specifically, the element substrate 93 is bonded and fixed to the second storage chamber 122 with four side walls 93a spaced from the inner side wall 122a. The counter substrate 94 is bonded and fixed to the first storage chamber 121 with the four side walls 94a being spaced apart from the inner wall 121a. Further, the dust-proof glass 111 is bonded and fixed to the first storage chamber 121 in a state where the four side walls 111a are separated from the inner side wall 121a. The dust-proof glass 112 has a side wall 112a located on the flexible wiring board 99 side in contact with the inner side wall 122a, and the other three side walls 112a are spaced apart from the inner side wall 122a. The two storage chambers 122 are bonded and fixed. In other words, the liquid crystal panel 92 is in a state where one side is in contact with the inner wall of the panel storage chamber 120 through the dust-proof glass 112 and the other three sides are separated from the inner wall of the panel storage chamber 120. It is bonded and fixed in the case 91 via an elastic adhesive.
[0065]
In this case, the hook 113 is integrally formed with a spring portion 128 as urging means instead of the spring portion 127. The spring portion 128 is desired in the panel storage chamber 120 and is elastically contacted with the dust-proof glass 112 in the panel storage chamber 120. The dust-proof glass 112 is urged by the urging force of the spring portion 128 at one side wall 112 a located on the flexible wiring board 99 side to the inner side wall 122 a of the second storage chamber 122.
[0066]
According to such an embodiment, substantially the same operations and effects as the first embodiment described above can be achieved.
[0067]
FIG. 8 is an explanatory view showing a third embodiment of the present invention. In FIG. 8, the same components as those in FIG.
[0068]
In the present embodiment, an elastic adhesive (not shown) made of, for example, a resin material is embedded in the inner side wall 122a of the second storage chamber 122, and the liquid crystal panel 92 is placed in the case through this adhesive. 91 is adhered and fixed. Specifically, the element substrate 93 is in a state in which one side wall 93a located on the flexible wiring board 99 side is in contact with the inner side wall 122a and the other three side walls 93a are spaced from the inner side wall 122a. Thus, the second storage chamber 122 is bonded and fixed. The counter substrate 94 is bonded and fixed to the first storage chamber 121 with the four side walls 94a being spaced apart from the inner wall 121a. Further, the dust-proof glass 111 is bonded and fixed to the first storage chamber 121 in a state where the four side walls 111a are separated from the inner side wall 121a. The dust-proof glass 112 is bonded and fixed to the second storage chamber 122 with the four side walls 112a being spaced apart from the inner wall 122a. In other words, the liquid crystal panel 92 has an elastic adhesive in a state where one side is in contact with the inner wall of the panel storage chamber 120 and the other three sides are separated from the inner wall of the panel storage chamber 120. The case 91 is adhesively fixed.
[0069]
In this case, the spring portion 127 is desired in the panel storage chamber 120 and is in elastic contact with the element substrate 93 in the panel storage chamber 120. The element substrate 93 is urged by the urging force of the spring portion 127 such that one side wall 93 a located on the flexible wiring board 99 side is urged to the inner side wall 122 a of the second storage chamber 122.
[0070]
According to such an embodiment, substantially the same operations and effects as the first embodiment described above can be achieved.
[0071]
FIG. 9 is an explanatory view showing a second embodiment of the present invention. In FIG. 9, the same components as those in FIG.
[0072]
In the present embodiment, an elastic adhesive (not shown) made of, for example, a resin material is embedded in the inner side wall 122a of the second storage chamber 122, and the liquid crystal panel 92 is placed in the case through this adhesive. 91 is adhered and fixed. Specifically, the element substrate 93 is bonded and fixed to the second storage chamber 122 with four side walls 93a spaced from the inner side wall 122a. The counter substrate 94 is bonded and fixed to the first storage chamber 121 with the four side walls 94a being spaced apart from the inner wall 121a. The dust-proof glass 111 is the first in a state where the side wall 111a on one side located on the flexible wiring board 99 side is in contact with the inner side wall 121a and the other side walls 111a are separated from the inner side wall 121a. Are fixedly attached to the storage chamber 121. The dust-proof glass 112 is bonded and fixed to the second storage chamber 122 with the four side walls 112a being spaced apart from the inner wall 122a. In other words, the liquid crystal panel 92 is in a state where one side is in contact with the inner wall of the panel storage chamber 120 through the dust-proof glass 111 and the other three sides are separated from the inner wall of the panel storage chamber 120. It is bonded and fixed in the case 91 via an elastic adhesive.
[0073]
In this case, the hook 113 is integrally formed with a spring portion 129 as urging means instead of the spring portion 127. The spring portion 129 is desired in the panel storage chamber 120 and is elastically contacted with the dust-proof glass 111 in the panel storage chamber 120. The dust-proof glass 111 is urged by the urging force of the spring portion 129 such that one side wall 111 a located on the flexible wiring board 99 side is urged to the inner side wall 121 a of the first storage chamber 121.
[0074]
According to such an embodiment, substantially the same operations and effects as the first embodiment described above can be achieved.
[0075]
FIG. 10 is an explanatory view showing a fifth embodiment of the present invention. In FIG. 10, the same components as those in FIG.
[0076]
In the present embodiment, the hook 113 is configured by omitting the spring portion 127. Instead, in the second storage chamber 122, a spacer 130 as an urging means made of elastic resin or the like is in elastic contact with the inner wall 122a and the element substrate 93. The counter substrate 94 is biased by the side wall 94 a on one side of the counter substrate 94 on the flexible wiring substrate 99 side to the inner wall 121 a of the first storage chamber 121 by the biasing force due to the elasticity of the spacer 130.
[0077]
According to such an embodiment, substantially the same operations and effects as the first embodiment described above can be achieved.
[0078]
In each of the above-described embodiments, a configuration in which one side located on the flexible wiring board 99 side of the liquid crystal panel 92 is brought into contact with the inner wall of the panel storage chamber 120 directly or via the dustproof glass 111 and 112 is described. However, the present invention is not limited to this, and the other side may be brought into contact with the inner wall of the panel storage chamber 120.
[0079]
Further, the side of the liquid crystal panel 92 brought into contact with the panel storage chamber 120 is not limited to one side, and two continuous sides of the liquid crystal panel 92 may be brought into contact with the panel storage chamber 120. That is, it is sufficient that at least one side of the liquid crystal panel 92 is in contact with at least two consecutive sides separated from the inner wall of the panel storage chamber 120 so that the degree of freedom due to thermal expansion is ensured.
[0080]
FIG. 11 is an explanatory diagram showing an optical system of a projection apparatus according to the sixth embodiment of the present invention.
[0081]
The present embodiment shows an example in which a single-plate projection device is configured using the liquid crystal panel module in the first to fifth embodiments. Obviously, the present invention may be applied to a three-plate projection device.
[0082]
In FIG. 11, a light source 151 used for a projector is constituted by a high-pressure mercury lamp and a reflector that incorporate a lamp such as a metal halide, for example. The light from the high-pressure mercury lamp is reflected forward by the reflector and enters the liquid crystal panel module 155 that functions as a light valve.
[0083]
Light from the light source 151 is given to the liquid crystal panel module 155 via the integrator lens 154. The integrator lens 154 includes first and second lens arrays 152 and 153 having a plurality of small lenses, and makes incident light uniform and incident on the entire incident surface of the liquid crystal panel module 155. As a result, uneven brightness is prevented from appearing in the projected image.
[0084]
The liquid crystal panel module 155 has the same configuration as the liquid crystal panel module in each of the above embodiments. The light incident from the incident surface side of the case 91 in each of the above embodiments is modulated by the liquid crystal panel and emitted. That is, the liquid crystal panel module 155 modulates incident light according to a video signal from a video signal supply unit (not shown), and emits video light on the screen 158 via the prism 156 and the projection lens 157. As a result, an image is displayed on the screen 158.
[0085]
In the embodiment configured as described above, the liquid crystal panel 92 can be prevented from being damaged or displaced from the case 91, so that the life of the liquid crystal panel module 155 can be extended, and the entire life of the projection apparatus can be extended. Can be realized.
[0086]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a liquid crystal panel module that can prevent breakage of the liquid crystal panel and displacement from the case, and a projection device using the liquid crystal panel module.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a liquid crystal panel module according to a first embodiment of the invention.
FIG. 2 is an equivalent circuit diagram of various elements and wirings in a plurality of pixels constituting a pixel region of a liquid crystal panel.
FIG. 3 is a plan view of an element substrate such as a TFT substrate as viewed from the counter substrate side together with each component formed thereon.
4 is a cross-sectional view showing the liquid crystal panel after being assembled in an assembly configuration in which an element substrate and a counter substrate are bonded together to enclose liquid crystal and cut at the position of line HH ′ in FIG.
FIG. 5 is a cross-sectional view showing a liquid crystal panel in detail
FIG. 6 is a flowchart showing a panel assembly process.
FIG. 7 is an explanatory diagram showing a liquid crystal panel module according to a second embodiment of the present invention.
FIG. 8 is an explanatory view showing a liquid crystal panel module according to a third embodiment of the present invention.
FIG. 9 is an explanatory diagram showing a liquid crystal panel module according to a fourth embodiment of the present invention.
FIG. 10 is an explanatory diagram showing a liquid crystal panel module according to a fifth embodiment of the invention.
FIG. 11 is an explanatory view showing a projection apparatus according to the present invention.
[Explanation of symbols]
91 ... Case
92 ... LCD panel
111 ... dustproof glass
112 ... dustproof glass
113 ... Hook
120 ... Panel storage room
121a ... Inner wall
122a ... inner wall
127 ... Spring part (biasing means)
128 ... Spring part (biasing means)
129 ... Spring part (biasing means)
130 ... Spacer (biasing means)

Claims (7)

A case with an open panel storage room;
At least one side is in contact with the inner wall of the panel storage chamber, and at least the other two continuous sides are separated from the inner wall of the panel storage chamber through an elastic adhesive. A liquid crystal panel module comprising: a liquid crystal panel bonded and fixed. An urging means is provided between the inner wall of the panel storage chamber and the liquid crystal panel, and biasing means for urging at least one side of the liquid crystal panel against the inner wall of the panel storage chamber. Item 2. A liquid crystal panel module according to item 1. 2. The liquid crystal panel module according to claim 1, wherein at least one side of the liquid crystal panel is in contact with an inner side wall of the panel storage chamber through a dustproof glass adhered to the surface. A biasing means is provided between the inner wall of the panel storage chamber and the dust-proof glass, and biasing means for biasing at least one side of the dust-proof glass to the inner wall of the panel storage chamber. Item 4. A liquid crystal panel module according to item 3. 5. The liquid crystal panel module according to claim 2, wherein the biasing means is a spring portion integrally formed with a hook that is hooked on the case and closes the panel storage chamber. 5. The liquid crystal panel module according to claim 2, wherein the biasing means is an elastic spacer. A projection apparatus using the liquid crystal panel module according to any one of claims 1 to 6.

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