JPH11295680A - Production of liquid crystal panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate reduction of yield caused by air bubbles remaining between a flexible sheet-shaped optical component and a substrate surface. SOLUTION: In this method for producing a liquid crystal panel 1, a polarizing plate S is set at an angle smaller than about 10 deg. to the substrate surface by holding one terminal S1 of the flexible sheet-shaped polarizing plate S for turning a surface, where a adhesive S0 is formed, toward a substrate P in a gap G between a roller surface 671 and the substrate surface and afterwards, the polarizing plate is moved while rolling a pressurizing roller 67 so that the polarizing plate S can be stuck on the substrate surface. Next, a degassing treatment is performed for heating the plural liquid crystal panels 1 with pressure from both sides while overlapping them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal panel used in a data imprinting apparatus for imprinting a date on a photosensitive film. More specifically, the present invention relates to a technique for attaching a sheet-like optical component to a substrate holding liquid crystal in a liquid crystal panel.

[0002]

2. Description of the Related Art As shown in FIG. 1, a camera module of a data imprinting apparatus 50 for imprinting a date on a photosensitive film in a camera generally includes a mirror 53 for guiding light emitted from a light source in a predetermined direction; The circuit board 54 includes a window 541 through which the light reflected by the mirror 53 passes, and the liquid crystal panel 1 arranged at a position corresponding to the window 541 of the circuit board 54. In the data imprinting apparatus 50, when the date is displayed on the liquid crystal panel 1 as a light transmitting portion, the light from the light source 52 passes through the light transmitting portion of the liquid crystal panel 1 and reaches the photosensitive film 55. You can imprint the date on the date.

As shown in FIG. 2, a liquid crystal panel 1 used in such a data imprinting apparatus 50 has a liquid crystal LC in a gap 31 between a first transparent substrate 10 and a second transparent substrate 20.
Has a sealed structure. The inner surface of each of the first transparent substrate 10 and the second transparent substrate 20 has an ITO film (I
transparent electrode 1 made of ndium tin oxide)
05 and 205 are respectively formed. Therefore, an electric field is applied to the liquid crystal by the transparent electrodes 105 and 205, and the liquid crystal L
When the orientation state of C is controlled, a number representing a date can be displayed as a translucent portion. Also, the first transparent substrate 1
The sheet-like polarizing plate 1 is provided on each outer surface of the first and second transparent substrates 20 (substrate surface opposite to the side where liquid crystal is sealed).
Nos. 02 and 202 are respectively adhered by an adhesive.

In the method for manufacturing the liquid crystal panel 1, the step of attaching the polarizing plates 102 and 202 to each substrate surface of the first transparent substrate 10 and the second transparent substrate 20 using an adhesive is performed by using an adhesive. After pressing the polarizing plates 102 and 202 that direct the surface on which the layer is formed toward the substrate surface with a pressure roller, the polarizing plates 102 and 202 are moved along the substrate surface while rolling the pressure roller, whereby Affix to the surface.

After the polarizing plates 102 and 202 are attached by such a method, if bubbles remain between the polarizing plates 102 and 202 and the substrate surface, the bubbles may have a size of about 10 μm to 20 μm. Also, the presence of bubbles indicates that the photosensitive film 5
5, the quality of the liquid crystal panel 1 is degraded. Therefore, conventionally, as shown in FIG.
After the liquid crystal panels 1 to which the polarizing plates 102 and 202 are attached are arranged one by one on a tray 91, the tray 91 is put into an autoclave, and the polarizing plates 102 and 202 are heated while being pressed in the autoclave. (Defoaming treatment).

[0006]

The liquid crystal panel 1 used in the data imprinting device 50 of the camera has a polarizing plate 10 compared to a liquid crystal panel used in a normal liquid crystal display device.
Polarizers 102, 20 generated in the process of attaching 2, 202
The presence of bubbles (hereinafter referred to as “displaced bubbles”) resulting from the displacement of 2 greatly reduces the performance of the liquid crystal panel 1. That is, when the sticking start portion is pulled when the polarizing plates 102 and 202 are stuck, the bubbles tend to be shifted to the edge side of the polarizing plates 102 and 202, but even if the bubbles are generated in such a place. In the case of the liquid crystal panel 1 used for the data imprinting device 50, the size is as small as 11 mm × 7 mm, so that the distance from the edge of the polarizers 102 and 202 to the cut-off portion (the outer edge of the date display area) is small. Short,
This is because bubbles will be located in the display area.

[0007] Nevertheless, conventionally, the polarizing plate 10
It is assumed that air bubbles generated when attaching 2, 202 may be removed by a defoaming process performed later in an autoclave, and the conditions when attaching the polarizing plates 102, 202 to the substrate surface do not generate air bubbles. Study from the viewpoint of not being enough. However, in the conventional defoaming process of pressurizing and heating in an autoclave, there is a problem that the effect of removing bubbles is not sufficient, and the yield of the liquid crystal panel 1 used in the data imprinting device 50 is low.

[0008] In view of the above problems, an object of the present invention is to provide:
It is an object of the present invention to provide a method of manufacturing a liquid crystal panel capable of eliminating a decrease in yield due to bubbles remaining between a flexible sheet-like optical component and a substrate surface.

[0009]

In order to solve the above-mentioned problems, according to the present invention, the two sheets bonded together through a predetermined gap are provided.
Liquid crystal is sealed between two substrates, and a flexible sheet-like optical component is attached to the substrate surface of the substrate opposite to the surface on which the liquid crystal is sealed, via an adhesive. In the method for manufacturing a liquid crystal panel according to the aspect of the invention, in the step of attaching the optical component to the substrate surface, one end of the optical component having a surface on which the adhesive layer is formed faces the substrate surface may be a roller surface of a pressure roller. The optical component is positioned at an angle of 10 ° or less with respect to the substrate surface so as to be sandwiched between the optical component and the substrate surface. From this state, the optical component is pressed by the pressure roller while pressing the optical component. The optical component is attached to the substrate surface by rolling a pressure roller along the substrate surface from one end side to the other end side of the optical component.

[0010] In the present invention, it is preferable that an angle formed by the optical component with respect to the substrate surface when the optical component is aligned with the substrate surface is 5 ° or less.

The inventor of the present application has made repeated studies that one end of a flexible sheet-like optical component having the surface on which the pressure-sensitive adhesive layer is formed is directed toward the substrate surface is brought into contact with the roller surface of the pressure roller. After aligning the optical component with the board surface so that it is sandwiched between the board surface and the optical component, the pressure roller is moved while rolling on the optical component to attach the optical component to the board surface. New knowledge has been obtained that the angle formed by the optical component greatly affects whether or not bubbles are taken in between the substrate surface and the optical component. That is, the posture of the optical component at an angle of 10 ° or less with respect to the substrate surface, preferably 5 °.
When the optical components are aligned on the board surface by the pressure roller from this state,
It has been found that a slippage of the optical component caused by the pulling of the optical component during the attachment of the optical component does not occur, thereby improving the yield of the liquid crystal panel.
The reason is 10 ° or less or 5 ° with respect to the substrate surface.
If the optical component is kept flat to the following angle, the force of the directional component that tries to pull the optical component when the pressure roller moves while rolling will be small. It is considered that the deviation itself is unlikely to occur.

In the present invention, when positioning the optical component at a predetermined angle with respect to the substrate surface, the pressure roller is disposed at a position where the roller surface contacts the substrate surface. Preferably, one end of the optical component is sandwiched in a gap formed between the roller surface and the substrate surface. If one end of the optical component is sandwiched in the gap between the roller surface and the substrate surface formed when the pressure roller is placed at a position where the roller surface contacts the substrate surface, the optical component Since it is adhered from the (one end) to the substrate surface without any gap, even if the pressure roller moves while rolling on the optical component, the portion already adhered to the substrate surface does not shift. Therefore, no bubble is generated between the optical component and the substrate surface.

In another embodiment of the present invention, a liquid crystal is sealed between two substrates bonded to each other with a predetermined gap therebetween, and a substrate on a side opposite to a surface of the substrate on which liquid crystal is sealed is provided. In a liquid crystal panel manufacturing method in which flexible sheet-like optical components are adhered to a surface via an adhesive, after the optical components are attached to the substrate surface, the optical components are pressed by a pressing jig. A defoaming process of heating the optical component and the substrate while applying pressure for pressing the entire surface against the substrate surface is performed.

In the present invention, the optical component is heated in a state where the entire surface of the optical component is pressed against the substrate surface by the pressing jig, so that pressure is concentrated on the portion expanded by the bubbles. Further, only the force in the direction of crushing the bubbles is applied to the bubbles existing between the optical component and the substrate surface. Therefore, the effect of eliminating bubbles is large.

According to the present invention, in the present invention, a plurality of the substrates to which the optical components are adhered are overlapped, and all of the plurality of substrates are pressed using the pressing jig from the outer side of the plurality of substrates. The defoaming treatment is preferably performed while applying pressure to the substrate. With such a configuration, since a large number of substrates can be collectively processed by a simple apparatus, there is an advantage that productivity is improved.

In the liquid crystal panel constructed as described above, since no air bubbles remain between the flexible sheet-like optical component and the substrate, the image formed by controlling the alignment state of the liquid crystal can be used as a photosensitive film. It is suitable for manufacturing a liquid crystal panel for a data imprinting device of a camera for imprinting on a camera.

[0017]

Embodiments of the present invention will be described with reference to the accompanying drawings.

FIGS. 1A and 1B are a schematic configuration diagram of a data imprinting device constructed in a camera and an explanatory diagram showing the principle thereof.

As shown in FIGS. 1A and 1B, a camera module used in a data imprinting apparatus 50 for imprinting a date on a photosensitive film 55 in a camera emits light emitted from a light source lamp 511 in a predetermined manner. Mirror 53 leading in the direction of
And a window 541 through which light reflected by the mirror 53 passes.
Are formed, and the liquid crystal panel 1 arranged at a position corresponding to the window of the circuit board 54. Here, the mirror 53 and the liquid crystal panel 1 are supported by frames 57 and 58, respectively. In the data imprinting apparatus 50, when the date is displayed on the liquid crystal panel 1 as a light transmitting portion, the light from the light source 52 passes through the light transmitting portion of the liquid crystal panel 1 and reaches the photosensitive film 55. You can imprint the date on the date.
As a light source, in addition to the light source lamp 511, FIG.
As shown in FIG. 7, external light 512 taken into the camera at a predetermined timing by a shutter 56 using a liquid crystal panel.
Sometimes you use As a light source, a light source lamp 511
In order to selectively use the external light 512 and the external light 512, a half mirror may be used as the mirror 53.

FIG. 2 shows the data imprinting apparatus 5 shown in FIG.
FIG. 2 is a longitudinal sectional view illustrating a configuration of a liquid crystal panel 1 used for the liquid crystal panel 0.

In FIG. 2, the liquid crystal panel 1 has a first transparent substrate 10 made of a transparent glass substrate and a second transparent substrate 20 also made of a transparent glass substrate. A sealant 30 is formed on one of these transparent substrates by printing or the like, and a predetermined gap 31 is formed between the first transparent substrate 10 and the second transparent substrate 20 with the sealant 30 interposed therebetween.
It is adhesively fixed across. The cell gap between the first transparent substrate 10 and the second transparent substrate 20 is determined by a spacer 3 interposed between the first transparent substrate 10 and the second transparent substrate 20.
2. The first transparent substrate 10 and the second
The liquid crystal LC is sealed in a liquid crystal sealed region 300 defined by the sealant 30 in the gap 31 between the transparent substrate 20 and the transparent substrate 20. Alignment films 101 and 201 are formed on both the first transparent substrate 10 and the second transparent substrate 20, and the liquid crystal LC is subjected to STN (Super Twisted Nema).
tic) method.

On each outer surface of the first transparent substrate 10 and the second transparent substrate 20 (the substrate surface opposite to the side where liquid crystal is sealed), a polarized light made of a flexible plastic sheet is provided. Plates 102 and 202 (sheet-shaped optical components) are respectively adhered via an adhesive.

The second transparent substrate 20 is the first transparent substrate 10
Since the second transparent substrate 20 is larger than the first transparent substrate 10, a part of the second transparent substrate 20 protrudes from the lower end edge of the first transparent substrate 10.
The electrical connection with the circuit board 54 shown in FIG.

On each inner surface of the first transparent substrate 10 and the second transparent substrate 20, a transparent electrode 10 is formed by an ITO film.
5, 205 are formed in a pattern capable of displaying a date. Therefore, by applying a voltage to the desired transparent electrodes 105 and 205 based on the driving signal output from the circuit board 54, the orientation state of the liquid crystal LC positioned between the electrodes is controlled, and the desired liquid crystal panel 1 is controlled. (A number or the like representing a date) can be displayed as a light-transmitting portion.

A method of manufacturing such a liquid crystal panel 1 (a method of manufacturing a liquid crystal display device) will be described with reference to FIG.

FIG. 3 is a process sectional view showing a method for manufacturing the liquid crystal panel 1.

In FIG. 3, an ITO sputtering step ST1 is performed.
Now, an ITO film 50 is formed on a large-sized glass substrate capable of forming a large number of first transparent substrates 10 and second transparent substrates 20.
1 is continuously formed by sputtering. From the ITO sputtering process ST1 to a sheet cutting process ST3 described later,
Both the first transparent substrate 10 and the second transparent substrate 20 are formed collectively on a large glass substrate. In addition, since the first transparent substrate 10 and the second transparent substrate 20 are subjected to basically the same processing up to the cutting step ST3 on the large glass substrate, FIG. Until now, only the first transparent substrate 10 is shown.

Next, a photolithography step ST2 is performed on the large glass substrate. In this photolithography step ST2, ITO formed on a large glass substrate
After a resist 502 is applied over the entire surface of the film 501, exposure and development are performed using a photomask 503 to form a resist mask 504. Next, the resist mask 5
After the ITO film 501 is etched using the mask 04 as a mask to pattern and form the transparent electrodes 105 and 205, the resist mask 504 is peeled off and removed.

Next, in a cutting step ST3, the large glass substrate is cut into a predetermined length, and the first transparent substrate 1 is cut.
The second transparent substrate 20 is divided into a medium-sized glass substrate capable of taking a plurality of 0s and a medium-sized glass substrate capable of taking a plurality of 0s.

Next, in an orientation film printing / firing step ST4, an orientation film 101 is formed on both the medium-sized glass substrate for forming the first transparent substrate 10 and the second transparent substrate 20.
After forming 201, in a rubbing step ST5, a rubbing process is performed on both of the medium-sized glass substrates.

Next, in a seal printing step ST6, a sealing agent 30 is applied to a medium-sized glass substrate for forming the second transparent substrate 20 or a medium-sized glass substrate for forming the first transparent substrate 10. Print. In the seal printing step ST6, a discontinuity is formed as a liquid crystal injection port in a part of the sealant 30.

Next, in an assembly step ST7, a medium-sized glass substrate for forming the second transparent substrate 20 or the first glass substrate is formed.
After the spacers 32 are sprayed on a medium-sized glass substrate for forming the transparent substrate 10, the medium-sized glass substrates are bonded to each other with a sealant 30 interposed therebetween.

The panel thus bonded is cut into strips in a strip cutting step ST8. In the strip cutting step ST8, the portions that become the liquid crystal panel 1 when divided later are in a row in a strip shape and are connected. Each inlet opens.

Next, in the injection / sealing step ST9, the gap 3 between the first transparent substrate 10 and the second transparent substrate 20 is set.
After the liquid crystal LC is vacuum-injected into 1 (liquid crystal enclosing area 300), the liquid crystal injection port is closed with a sealant made of an ultraviolet curable resin.

Next, in a single-piece cutting step ST10, the strip-shaped panel is cut into single-piece liquid crystal panels 1.

Next, in a polarizing plate attaching step ST11,
The polarizing plates 102 and 202 are attached to the outer surfaces (substrate surfaces) of the first transparent substrate 10 and the second transparent substrate 20, respectively. The attachment of the polarizing plates is performed on both the first transparent substrate 10 and the second transparent substrate 20 as the polarizing plates 102 and 202, and the steps of attaching the polarizing plates to either substrate are substantially the same. Since it is a content, the polarizing plate attaching step ST11
In describing, the polarizing plate S
The description will be made assuming that the (polarizing plates 102 and 202) are attached to the substrate surface P0 of the transparent substrate P (the first transparent substrate 10 and the second transparent substrate 20).

In this embodiment, the polarizing plate attaching step ST11
Then, for example, a polarizing plate attaching device 60 shown in FIG. 4 is used. The polarizing plate sticking device 60 generally includes a feeding unit 6 for feeding a long polarizing plate wound in a roll shape together with a release paper.
1, a cutting section 62 for cutting the long polarizing plate separated from the release paper in the supply section 61 into a predetermined length dimension,
And a sticking section 63 for sticking the polarizing plate cut at a predetermined length by the cutting section 62 to the substrate surface of the liquid crystal panel. A supply roller 611 for setting a roll-shaped polarizing plate supported on a release paper by an adhesive is provided on the supply section 61.
And a collecting roller 612 for collecting the release paper peeled off from the polarizing plate.

As shown in FIG. 5A, the attaching section 63 includes a panel set section 65 formed on an L-shaped stage 68 as a whole, and a polarizing plate attaching mechanism 66 which stands by diagonally above the stage. Is arranged. Panel set section 65
In FIG. 5B, the liquid crystal panel 1 is positioned and held in the rectangular area 650 formed by the L-shaped chucking pieces 651 and 652 as shown in FIG. Polarizing plate sticking mechanism 66
The polarizing plate S supplied from the cutting section 62 at a position separated from the pressing roller 67 by a predetermined distance so that one end S1 of the polarizing plate S faces the pressing roller 67. A vacuum suction device 681 that vacuum-adsorbs the other end S2 side of the polarizing plate S is configured. Vacuum suction device 6
81 and the pressure roller 67 are both supported by an arm 682, and the base end of the arm 682 is
It can swing about 83. The lower end of a vertical shaft 684 is connected to a substantially central portion of the arm 682.
The arm 682 moves the support shaft 6
It swings around 83 and the vertical position of the pressure roller 67 changes. Further, a pressure adjusting device 685 having a built-in spring for urging the distal end of the arm 682 downward is connected to the distal end of the connecting portion between the arm 682 and the vertical shaft 684. A roller position adjusting device 686 for adjusting the position of the pressure roller 67 in the longitudinal direction on the arm 68 is also provided at the distal end of the arm 68.

A method of attaching the polarizing plate S to the substrate surface P0 using the polarizing plate attaching apparatus 60 having the above-described configuration will be described with reference to FIGS. 5 and 6A and 6B.

First, as shown in FIG. 5, the liquid crystal panel 1 is set in the panel setting section 65 of the polarizing plate sticking device 60.

Next, as shown in FIG. 6A, the pressure roller 67 is lowered toward the substrate P of the liquid crystal panel 1 and stopped at a position where the roller surface 671 is just in contact with the substrate surface P0 of the substrate P. . At this time, the polarizing plate S has a roller surface 671 with the surface on which the layer of the adhesive S0 is formed facing the substrate surface P0.
One end S1 of the polarizing plate S inside the gap G between the substrate and the substrate surface P0.
Is sandwiched. Until now, the polarizing plate S is suctioned and held by the vacuum suction device 681 in an oblique posture, but when one end S1 of the polarizing plate S is sandwiched between the pressure roller 67 and the substrate surface P0. Since the upper edge S11 of the one end S1 of the polarizing plate S is pressed by the pressure roller 67 and the other end S2 is in an oblique posture as if it floats, the vacuum suction device 68
1, the polarizing plate S remains on the substrate surface S0.
And remains at an angle of about 10 ° or less. Here, when the polarizing plate S is made flat, the polarizing plate S can be formed without generating bubbles between the polarizing plate S and the substrate surface S0.
In this embodiment, the angle between the polarizing plate S and the substrate surface S0 is set to about 5 ° or less. Thus, the one end S1 side of the polarizing plate S is aligned with the substrate surface P0. In the present embodiment, the size of the pressure roller 67 is 9 mm in roller diameter and 500 mm in roller width. According to this size, the load applied from the pressure roller 67 to the polarizing plate S is about 0.4 kg to about 1 k.
g, preferably about 0.4 kg to about 0.6 kg. That is, the load applied from the pressure roller 67 to the polarizing plate S is set to be small.

Next, the pressure roller 67 moves along the substrate surface P0 while rolling the upper surface of the polarizing plate S from one end S1 to the other end S2. During this time, the pressure roller 67 presses the polarizing plate S toward the substrate surface P0 with the above pressure. Therefore, the polarizing plate S is attached to the substrate surface P0 via the adhesive S0.

After attaching the polarizing plate S to the substrate surface P0 in this manner, a defoaming process for removing bubbles generated between the polarizing plate S and the substrate surface P0 is performed. As the defoaming process, in the present embodiment, as shown in FIG. 7, the polarizing plate S (the polarizing plates 102 and 202) is attached to the substrate P (the first transparent substrate 10 and the second transparent substrate 20) via an adhesive. A plurality of attached liquid crystal panels 1 are stacked on the tray 71 of the pressing jig 70 without any gap, and the plurality of liquid crystal panels 1 are stood upright on the tray 71 of the pressing jig 70. The liquid crystal panel 1 is aligned between the pressure plate 72 and the pressure plate 73. The pressure plate 73 presses the outermost liquid crystal panel 1 of the plurality of liquid crystal panels 1 toward the vertical plate 72.
As a result, in each of the liquid crystal panels 1, the entire surface of each polarizing plate S (the polarizing plates 102 and 202) is attached to the substrate P (the first transparent substrate 10) to which the polarizing plate S is attached via an adhesive.
Alternatively, it is pressed against the second transparent substrate 20). The liquid crystal panel 1 in which a large number of sheets are collectively pressed by the pressing jig 70 is put in an autoclave and heated. At this time, the inside of the autoclave may be pressurized.

As a result, the bubbles generated between the polarizing plate S and the substrate P are lost by being crushed or dispersed. In this manner, a large number of liquid crystal panels 1 are collectively subjected to a defoaming process, and a polarizing plate attaching step ST11 is performed.
Finish.

Thereafter, the final inspection step S shown in FIG.
At T12, an inspection is performed to determine whether or not air bubbles remain in the liquid crystal panel 1, and a lighting inspection is performed by supplying a predetermined inspection signal, and a pass / fail determination is performed.

[Main effects of the present embodiment] As described above, in the manufacturing method of the liquid crystal panel 1 according to the present embodiment, in the polarizing plate attaching step ST11, the polarizing plate S is moved by about 10 to the substrate surface P0.
When the polarizing plate S is adhered to the substrate surface P0 by aligning it in a slightly inclined posture at an angle of less than or equal to ° and moving the pressing roller 67 from this state while rolling on the polarizing plate S. . Therefore, no bubbles are generated due to the displacement of the polarizing plate S while the polarizing plate S is being attached.
The yield of the liquid crystal panel 1 is improved. The reason is that if the polarizing plate S is slightly flat with respect to the substrate surface P0, the force of the directional component that tends to pull the polarizing plate S when the pressing roller 67 moves while rolling is small. Therefore, the polarizing plate S
It is considered that this does not occur. When aligning the polarizing plate S with the substrate surface P0, the polarizing plate S is placed between the pressure roller 67 and the substrate surface P0 at a position where the roller surface 671 is just in contact with the substrate surface P0 of the substrate P. One end S1 of
In between. That is, the pressure roller 67 is placed on the polarizing plate S.
It does not come down. Therefore, since the polarizing plate S is stuck from the edge (one end S1) to the substrate surface P0 in a state in which there is no gap, even if the pressure roller 67 moves while rolling on the polarizing plate S, the polarizing plate S S does not shift. Therefore, it is possible to reliably prevent the occurrence of bubbles that are displaced between the polarizing plate S and the substrate surface P0.

If there is still a possibility that air bubbles may be generated between the polarizing plate S and the substrate surface P0, a pressure jig 70 is used to apply pressure to press the entire surface of the polarizing plate S against the substrate surface P0. Then, a defoaming process of heating the substrate P is performed. In this defoaming process, unlike the mere pressurization and heat treatment in the autoclave, the entire surface of the polarizing plate S is pressed against the substrate surface P0 by the pressurizing jig 70, so that the pressure is concentrated on the portion expanded by the bubbles. . Further, only the force in the direction of crushing the bubbles is effectively applied to the bubbles existing between the polarizing plate S and the substrate surface P0. Therefore, the effect of eliminating bubbles is large.

Therefore, the polarizing plate attaching step ST according to the present embodiment
In the liquid crystal panel 1 on which No. 11 is performed, no air bubbles remain between the polarizing plate S and the substrate P. Therefore, as in a liquid crystal panel for a camera module constituting a data imprinting device 50 for imprinting an image formed by controlling the alignment state of the liquid crystal LC onto a photosensitive film, bubbles such as slip bubbles are present. It is suitable for manufacturing a liquid crystal panel that greatly affects quality.

Further, in the present embodiment, when performing the defoaming process, a plurality of liquid crystal panels 1 are collectively processed using a simple tool such as the pressing jig 70, so that the productivity is high.

[Other Embodiments] In the above embodiment, the polarizing plate S is used as a sheet-like optical component with respect to the substrate P (the first transparent substrate 10 or the second transparent substrate 20).
Although the example of attaching the (polarizing plates 102 and 202) has been described,
Flexible sheet-shaped optical components are not limited to polarizing plates, but include reflectors, retarders, D-BEFs (reflective polarizers),
RDF (Reflective Display Fi)
lm), the present invention may be applied to a case where a CFP (color-printed film) is attached.

Further, in the above embodiment, an example was described in which the polarizing plates S were attached to both surfaces of the liquid crystal panel 1, but the polarizing plates S may be attached to only one surface of the liquid crystal panel 1.

In the method shown in FIG. 7, the pressure is applied from the left side of the plurality of liquid crystal panels 1 as viewed in the drawing.
Pressure is applied from the transparent substrate 20 side (the polarizing plate 202 side), but pressure is applied from the right side as viewed in the drawing, and the first transparent substrate 10 side (the polarizing plate 102 side).
Pressure may be applied. Of course, pressure may be applied from the liquid crystal panels 1 located on the left and right sides of the plurality of superposed liquid crystal panels 1.

[0053]

As described above, in the method of manufacturing a liquid crystal panel according to the present invention, the flexible sheet-like optical component is inclined at an angle of 10 ° or less with respect to the substrate surface, Preferably, the optical components are aligned in a prone position at an angle of 5 ° or less, and the optical components are adhered to the substrate surface by a pressure roller from this state. No air bubbles are generated due to this.

In the present invention, after the flexible sheet-like optical component is attached to the substrate surface, a defoaming process is performed in which the optical component is heated while the entire optical component is pressed against the substrate surface by a pressing jig. Therefore, pressure is concentrated on the portion swelled by the bubbles. In addition, only the force in the direction of crushing bubbles is applied to the bubbles between the optical component and the substrate surface,
The effect of eliminating bubbles is great.

[Brief description of the drawings]

FIGS. 1A and 1B are a schematic configuration diagram of a data imprinting device configured in a camera and an explanatory diagram showing the principle thereof.

FIG. 2 is a longitudinal sectional view showing a configuration of a liquid crystal panel used in the data imprinting apparatus shown in FIG.

3 is a process sectional view illustrating the method for manufacturing the liquid crystal panel illustrated in FIG.

FIG. 4 is a perspective view of a polarizing plate sticking apparatus used in a polarizing plate sticking step in the manufacturing process of the liquid crystal panel shown in FIG.

FIGS. 5A and 5B are explanatory views of a sticking section and a panel setting section of the polarizing plate sticking apparatus shown in FIG. 4, respectively.

6 (A) and 6 (B) are process cross-sectional views each showing a state in which a polarizing plate is aligned with a substrate in a sticking section of the polarizing plate sticking apparatus shown in FIG. 4; FIG. 9 is a process cross-sectional view showing a state in which is moved while rolling, and a polarizing plate is attached to a substrate surface.

7 is a process cross-sectional view showing a defoaming process performed after attaching a polarizing plate in a polarizing plate attaching process in the manufacturing process of the liquid crystal panel shown in FIG.

FIG. 8 is a process cross-sectional view showing a defoaming process performed after attaching a polarizing plate in a conventional liquid crystal panel manufacturing method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 liquid crystal panel 10 first transparent substrate 20 second transparent substrate 30 sealant 31 gap 50 data imprinting device 53 mirror 54 circuit board 55 photosensitive film 60 polarizing plate sticking device 63 sticking portion of polarizing plate sticking device 65 polarizing plate sticking Panel set part of device 67 Pressure roller of polarizing plate sticking device 70 Pressure jig 71 Tray 72 Vertical plate 73 Pressure plate 102, 202 Polarizer 105, 205 Transparent electrode 300 Liquid crystal sealing area 511 Light source lamp (light source) 512 Outside Light (light source) 681 Vacuum suction device LC liquid crystal P substrate P0 Substrate surface S Polarizing plate (flexible sheet-shaped optical component) S0 Adhesive for polarizing plate

Claims (7)

[Claims] 1. A liquid crystal is sealed between two substrates bonded to each other with a predetermined gap therebetween, and a substrate surface opposite to a surface of the substrate on which the liquid crystal is sealed is provided with a flexible material. In the method of manufacturing a liquid crystal panel in which sheet-shaped optical components having a pressure-sensitive adhesive are respectively applied via an adhesive, in the step of attaching the optical component to the substrate surface, the surface on which the adhesive layer is formed is attached to the substrate surface The one end of the optical component is held between the roller surface of the pressure roller and the substrate surface so that the optical component is positioned at one end with respect to the substrate surface.
Positioning is performed at an angle of 0 ° or less, and from this state, while pressing the optical component with the pressing roller, the pressing roller is moved from one end side of the optical component to the other end side of the substrate surface. A manufacturing method of a liquid crystal panel, wherein the optical component is attached to the substrate surface by rolling along the substrate. 2. The liquid crystal panel according to claim 1, wherein an angle formed by the optical component with respect to the substrate surface when the optical component is aligned with the substrate surface is 5 ° or less. Method. 3. The method according to claim 1, wherein when the optical component is positioned at a predetermined angle with respect to the substrate surface, the optical component is positioned so that the roller surface contacts the substrate surface. A method for manufacturing a liquid crystal panel, wherein one end of the optical component is sandwiched in a gap formed between the roller surface and the substrate surface when a pressure roller is disposed. 4. The method according to claim 1, wherein
After attaching the optical component to the substrate surface, a defoaming process of heating the optical component and the substrate while applying a force for pressing the entire optical component against the substrate surface by a pressing jig is performed. Liquid crystal panel manufacturing method. 5. A liquid crystal is sealed between two substrates bonded to each other with a predetermined gap therebetween, and the substrate has a flexible surface opposite to the surface on which the liquid crystal is sealed. In a method of manufacturing a liquid crystal panel in which sheet-shaped optical components having a) are respectively adhered via an adhesive, after the optical components are attached to the substrate surface, the entire surface of the optical components is applied to the substrate surface by a pressing jig. A method for manufacturing a liquid crystal panel, comprising performing a defoaming process of heating the optical component and the substrate while applying a pressing pressure. 6. The pressure jig according to claim 4, wherein a plurality of the substrates to which the optical components are attached are overlapped, and the pressing jig is used from an outer substrate side of the plurality of substrates. A method for manufacturing a liquid crystal panel, wherein the defoaming process is performed while applying pressure to all substrates. 7. The method according to claim 1, wherein
The method of manufacturing a liquid crystal panel, wherein the liquid crystal panel is a liquid crystal panel for a data imprinting device that imprints an image formed by controlling an alignment state of the liquid crystal on a photosensitive film.