JPH06337429A - Press and alignment device for liquid crystal cell - Google Patents

Abstract

PURPOSE:To provide an inexpensive press device by which a highly accurate LCD cell can be manufactured without being influenced by accuracy of a surface plate or the like, a surface condition or distortion or the like as well as without causing a trouble such as a crack in the press device to press the LCD cell. CONSTITUTION:The first sealed space 24 is formed between a surface plate 14 and a lower glass plate 1 constituting an LCD cell 10 by an O-ring 22a and sealing frames 18 and 22b. Similarly, the second sealed space 32 is formed between an upper glass plate 2 constituting the LCD cell 10 and an upper plate 26 by an O-ring 30. Air is introduced from a compressed air source 34 so that internal pressures of these sealed spaces 24 and 32 are increased uniformly, and upper and lower glass plates 2 and 1 are pressed, and the LCD cell 10 is pressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressing device and an alignment device used for manufacturing a liquid crystal cell which constitutes a liquid crystal display panel.

[0002]

2. Description of the Related Art FIG. 3 shows a liquid crystal display panel (LD
The cell structure of C) is shown briefly. The cell 10 shown in FIG. 3 has a structure in which two glass plates 1 and 2 are bonded together. Each of the glass plates 1 and 2 has a rectangular shape with one side of 300 to 500 mm and a plate thickness of about 1.1 mm. The liquid crystal sealant 3 is printed on either of the glass plates 1 and 2 by screen printing or the like.
Then, spacer spheres having a diameter of about 5 μm are scattered, the glass plates 1 and 2 are aligned with each other, and then bonded. After the bonding, the sealing agent 3 using a thermosetting resin such as an epoxy resin is thermoset. As a result, the two glass plates 1 and 2 are fixed while the gap 5 for injecting the liquid crystal is maintained.
The same applies when a liquid crystal panel is formed by using a TFT substrate and a color filter instead of the glass plates 1 and 2.

When a liquid crystal panel is manufactured by such a process, it is necessary to perform heat treatment with the glass plates 1 and 2 bonded together in order to cure the sealing agent.
In the process of this heat treatment, problems such as deterioration of alignment accuracy occur due to thermal expansion and the like. Therefore,
In recent years, a bonding apparatus or a pressing apparatus that can perform a curing process using ultraviolet light as shown in FIG. 4 has been adopted.

The device shown in FIG. 4 is a pressing device capable of fixing the LCD panel 10 in a pressed state by the ultraviolet light source 6. The pressing device 60 includes a transparent quartz plate 61 set on the ultraviolet light source 6, and the quartz plate 6
1 as a surface plate, LCD panel 10 installed on it
And a pressurizing mechanism 63 for pressurizing from above. The pressing mechanism 63 includes a vertical movement mechanism 65 that moves the upper plate 67 up and down, an elastic mat 69 attached to the lower portion of the upper plate 67, and a clamp 71 that fixes the upper plate 67 and the quartz plate 61. ing. Compressed air can be introduced from a compressed air source 72 between the elastic mat 69 and the upper plate 67, and the elastic mat 69 is pressurized by the pressure of the compressed air.
And expand the LCD panel 10 to a quartz plate 6 with a predetermined pressure.
It is possible to pressurize toward 1.

When the LCD panel 10 is bonded using the press device 60, first, the LDC panel 1 is bonded.
On the lower glass plate 1 of No. 0, a sealant made of ultraviolet curable ink is printed. Next, spacer balls are scattered on the lower glass plate 1. After that, the upper glass plate 2 and the lower glass plate 1 constituting the LCD panel 10 are independently transported and mounted on an alignment device for positioning. After the top and bottom glasses are accurately aligned by the alignment device, a relatively low pressure is applied (0.1
~ 0.3 kg / cm ² ) Temporary fixing or temporary adhesion.
The temporarily fixed LCD cell assembly 10 is mounted on a pressing device 60, and a pressure of about 1 kg / cm ² is applied to apply pressure. At the same time, in order to cure the ultraviolet curable resin used as the sealant, ultraviolet light is emitted from the ultraviolet light source 6 to perform the main adhesion.

Through such a process, the LCD cell 10 in which the gap corresponding to the diameter of the spacer sphere is held between the upper and lower glass plates can be manufactured. LCD cell 1
After the 0 is manufactured, liquid crystal is injected into this gap and stopped by the encapsulant. In such an LCD cell, it is important that the gap is accurately formed, for example, in the present example, it is within an allowable error of about 0.5 μm vertically with respect to 5 μm. At the same time, cell 1
It is also important that each of the glass plates forming 0 is free from deformation, scratches, relative displacement, and the like.

When the press device 60 shown in FIG. 4 is used,
The elastic mat 69 applies pressure from above the LCD cell 10 substantially uniformly. On the other hand, it is difficult to secure finishing accuracy on the entire surface of the surface plate that supports the lower part of the LCD cell 10, that is, the quartz plate 61.
It is difficult to apply uniform pressure from below the cell 10. Further, if the surface of the quartz plate 61 is subjected to minute chipping or foreign matter, the LCD cell may be scratched, deformed, or cracked. Thus, if the surface of the quartz plate 61 is poorly finished, the cell 10 may be adversely affected by deformation, scratches, misalignment, or the like. On the other hand, if an attempt is made to ensure sufficient finishing accuracy of the quartz plate 61, the cost for finishing the quartz plate 61 will increase, and the press device will become very expensive.

Even when a quartz plate having a high finishing accuracy is used, an error of about 20 μm is expected in the accuracy of the thickness of the glass plate constituting the LCD cell 10, so that it is within the error range of the gap. It is impossible to achieve 0.5 μm.

[0009]

Therefore, in the present invention, it is an object of the present invention to provide a press device capable of applying a uniform pressure to an LCD cell without being affected by the finishing accuracy of the surface plate or the surface condition. Has an aim. And, even if the finishing accuracy of the surface plate is not so high or the surface condition is not so good, a pressing device that does not cause problems such as deformation, scratches, or misalignment of the LCD cell due to these It is intended to be provided. Further, it is also an object to provide a high-performance press device at low cost without requiring a high finishing accuracy for the surface plate. Further, it is also an object to provide a pressing device capable of maintaining a gap between two glass plates with high accuracy.

In the conventional press machine, the LC
When pressure is applied to the D cell, the surface plate deforms downward,
Along with this, there is a problem that the LCD cell is also distorted. The deformation of the surface plate can be suppressed by increasing the thickness of the surface plate, but this method makes the surface plate expensive. Moreover, even if the strength is increased, it is difficult to completely prevent the distortion of the surface plate of the quartz plate. On the other hand, if the platen is made of a material having high strength such as iron, there is a problem that the LCD panel cannot be effectively irradiated with ultraviolet light. Therefore, in the present invention, even if the surface plate is deformed, LC
It is also an object of the present invention to provide a pressing device that does not cause distortion in the D cell.

Further, in the process of transporting and installing the LCD cell to the press device, when the LCD cell is placed on the quartz plate, the cell slips and it is difficult to set the cell at a predetermined position. There is also. Also, LC
After the D cell is pressed, the LCD cell and the quartz plate come into close contact with each other, the LCD cell is difficult to peel off, and the LCD cell is often scratched. When the LCD cell is transported, static electricity may be generated between the quartz plate and the glass plate of the LCD cell, and it may be more difficult to peel it off.

Therefore, the smooth process of pressing the LCD cell is one of the important things to improve the productivity of a series of processes for manufacturing the LCD panel. Easy to install on the press machine,
It is also desirable to be removable. Further, conventionally, the step of aligning the glass forming the LCD cell and the step of pressing the LCD cell are separately performed, and if they can be performed by one of these devices, the manufacturing efficiency is improved. be able to. Therefore, in the present invention, it is easy to set the LCD cell at a predetermined position, remove it, and hand it over to the next step,
Furthermore, it aims at providing the alignment and press apparatus which can perform an alignment and a press simultaneously.

[0013]

According to the present invention, first, in order to obtain a high quality LCD cell by eliminating adverse effects from the precision of the surface plate or the surface condition, the surface of the surface plate and L
A layer of a fluid such as air is provided between the CD cell and the CD cell. That is, a predetermined space for injecting the liquid crystal is maintained by pressing the second plate member, which is superposed with the spacer in between, against the first plate member arranged on the surface plate according to the present invention. In the pressing device for a liquid crystal cell in which these first and second plate members are bonded together in a closed state, a sealing means capable of forming a closed space between the surface and the first plate member is provided on the surface plate surface. It is characterized by further comprising a compressed fluid supply means for supplying a compressed fluid to the closed space.

In such a pressing apparatus according to the present invention, the sealing means secures a fluid layer between the surface of the surface plate and the first plate member. Therefore, the first and second
Since the first plate member is not pressed directly in contact with the surface plate but is pressed through the layer of compressed fluid when the plate members of I will not receive it. For this reason, even if the accuracy of the surface plate is low or the surface condition is bad, the LCD cell is scratched or deformed due to it, or the distance between the first and second plate members ( The accuracy of (gap) does not deteriorate.

Further, not only the first plate member but also the second plate member may be pressed through a fluid layer. That is,
A predetermined interval for injecting liquid crystal by superposing the second plate member held by the plate holding means on the first plate member arranged on the surface of the surface plate with the spacer interposed therebetween and pressing the same. In a pressing device for a liquid crystal cell in which these first and second plate members are bonded together in a state of holding the plate, the surface of the surface plate has a first plate between the surface and the first plate member.
And a second sealing means capable of forming a second sealed space between the surface of the plate holding means and the second plate member. It is also effective to provide a compressed fluid supply means for supplying a compressed fluid to the first and second closed spaces.

By providing the second sealing means, a fluid layer can be secured between the second plate member and the plate holding means. Therefore, it is possible to manufacture a high-quality LCD cell irrespective of the surface accuracy of the plate holding means that presses the second plate member or the surface condition. Further, the pressures of the fluid layer formed by the first sealing means and the fluid layer formed by the second sealing means are kept equal,
By pressing the LCD cell from the direction of the first plate member and the direction of the second plate member, it becomes possible to bond the LCD cell without warping or other distortion. That is, even if the platen is distorted by pressure, uniform pressure is applied to both sides of the LCD cell by the uniformly compressed fluid. Therefore, the first and second plate members are pressed equally without being affected by the strain generated on the surface plate, and the accuracy of the gap between them is determined by the accuracy of the spacer, so that a highly accurate gap can be secured. it can. Further, no distortion occurs in the LCD cell itself. The layer of fluid producing such an even pressure is the first sealing means,
For a first closed space or gap formed by the first plate member and the surface plate, and a second closed space or gap formed by the second sealing means, the second plate member and the plate holding means. , Can be realized by using a compressed fluid supply means capable of supplying fluid so that the internal pressures of the respective spaces or gaps become equal.

As described above, the surface accuracy as a surface plate is not required so much, and since some deformation is allowed, the strength can be set low. Therefore, the first and second
Since the plate members of are bonded together by sandwiching the ultraviolet curable resin,
Even if an ultraviolet ray transmitting member that transmits ultraviolet rays is used for the surface plate, the ultraviolet ray transmitting member does not require such strength and surface accuracy, and provides a high-performance press device at a low price. It becomes possible.

Further, the above-mentioned pressing device is used as an alignment device for aligning the first and second plate members before pressing by setting the first and second closed spaces in a depressurized state. Is possible. That is, the second plate member held by the plate holding means is positioned and superposed on the first plate member arranged on the surface of the surface plate with the spacer sandwiched therebetween, and these plates are superposed. As an alignment and pressing device for a liquid crystal cell, in which these first and second plate members are bonded to each other by pressing the members against each other while maintaining a predetermined space for injecting the liquid crystal, Is provided with sealing means capable of forming a first closed space between the surface and the first plate member, and the surface of the plate holding means is provided with a second closed space between the surface and the second plate member. A second sealing means capable of forming a space is provided, a compressed fluid supply control means capable of setting the internal pressures of the first and second closed spaces to a pressurized state and a depressurized state, and further arranged on the surface platen. Holds the first plate member As can align with respect to the second plate member held by stage, it is desirable to support the platen by moving table mechanism.

When performing alignment and pressing for a liquid crystal cell using such an alignment and pressing device, the compressed fluid supply control means holds the first and second closed spaces in a depressurized state, and And the second plate member are adsorbed and supported on the surface of the surface plate and the surface of the plate holding means, respectively, and the moving table mechanism is driven to hold the first plate member supported on the surface of the surface plate by the plate holding means. The second and third plate members, the first and second plate members are overlapped with the spacer interposed therebetween, and the compressed fluid supply control means brings the first and second closed spaces into a pressurized state. Then, an alignment and pressing method may be used which is characterized in that these first and second plate members are pressed against each other and bonded together.

By using such an alignment and pressing device, the alignment and pressing of the first and second plate members can be easily performed by one device only by changing the pressure state of the first and second closed spaces. It can be carried out. In addition, since the first or second plate member is not brought into close contact with the surface of the surface plate or the plate holding member during alignment and pressing, it is also possible to install the first and second plate members, or It is easy to remove the LCD cell, and these plate members or the LCD cell are not damaged.

[0021]

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

[Embodiment 1] FIG. 1 shows a schematic configuration of a liquid crystal cell pressing apparatus according to Embodiment 1 of the present invention. The pressing device 12 according to the present invention includes a surface plate 14 of a transparent quartz plate arranged on the ultraviolet light source 6, and an air cylinder 16 for pressing the LCD cell 10 arranged above the surface plate 14 from above. I have it. The LCD cell 10 has the same configuration as the LCD cell (liquid crystal display panel) described above with reference to FIG. This LCD cell 10 and surface plate 1
A cylindrical seal frame 18 having a size slightly larger than the LCD cell 10 is inserted between the seal frame 1 and the LCD cell 10.
A region slightly smaller than the area of the LCD cell 10 is formed inside the LCD cell 8. On both sides of the seal frame 18, grooves 20a and 2 are provided at positions facing the outer peripheral portion 11 of the LCD cell 10.
0b are formed. An O-ring 22a is inserted in the groove 20a on the side of the seal frame 18 facing the surface plate 14, and an O-ring 22b is inserted in the groove 20b of the seal frame 18 on the side facing the LCD cell 10. Has been inserted.
Then, the O-ring 22a, the seal frames 18 and 2
The 2b forms a first closed space 24 between the surface plate 14 and the lower glass 1 forming the LCD cell 10.

The cylinder 16 has an upper plate 26 for pressing the LCD cell 10 from above. This top plate 26
On the side facing the LCD cell 10, a groove 28 is formed at a position facing the outer peripheral portion 11 of the LCD cell 10.
An O-ring 30 is inserted in this groove 28. The O-ring 30 forms a second closed space 32 between the upper glass 2 and the upper plate 26 that form the LCD cell 10.

Further, the first closed space 24 and the second closed space 32 are connected to the same compressed air source 34,
Compressed air can be supplied or discharged so that the internal pressures of the closed spaces 24 and 32 can be uniformly increased.

The LCD cell 1 is manufactured by using the press device 12.
When 0 bonding is performed, the seal frame 18 is set on the surface plate 14 via the O-ring 22a. in addition,
Through the O-ring 22b, the temporarily fixed LCD cell 10 is set in the same manner as the conventional pressing device described above. Further, operate the air cylinder 16 to move the upper plate 2
6 is set on the LCD cell 10 via the O-ring 30. Then, from the compressed air source 34, the first closed space 2
While keeping the internal pressures of 4 and the second closed space 32 equal,
The internal pressure is raised to about 1 kg / cm ² and the LCD cell 10 is pressed from the upper and lower parts. At the same time, ultraviolet light is emitted from the ultraviolet light source 6 to cure the ultraviolet curable resin applied as a sealant to perform the main adhesion.

In such a process, when the press device 12 of this example is used, the LCD cell 10 is set through the first closed space 24 formed by the O-rings 22a, 22b and the seal frame 18. The cell 10 does not slip on the quartz plate 14 when the cell 10 is set, and the cell 10 can be easily set at a predetermined position of the press device 12. Further, even after pressing, the LCD cell 10 does not adhere to the quartz plate 14, and therefore the peeling is easy. Therefore, it is easy to convey the LCD cell 10 after pressing, and the LCD cell 1 is required to be conveyed.
There is no problem that hurt 0. For this reason, in the manufacturing process of the LCD cell 10, the pressing process can be smoothly performed, and the productivity of the LCD cell can be improved.

In the pressing device 12 of this example, when the LCD cell 10 is pressed, the LCD cell 10 is further pressed.
Between the lower glass plate 1 and the quartz plate 14 which is a surface plate.
The closed space 24 of the quartz plate 1 is formed at the time of pressing.
4 and the lower glass plate 1 do not directly contact with each other. Therefore, since the lower glass plate 1 is not directly affected by the quartz plate 14, the surface condition of the quartz plate 14 is not good,
Even if there are scratches or dust, the lower glass plate 1 will not be deformed, scratched or cracked during pressing. Further, since the quartz plate 14 and the LCD cell 10 are not in direct contact with each other, there is no direct relationship between the precision of the quartz plate 14 and the precision of the pressed LCD cell 10. Therefore, the gap of the LCD cell 10 is determined by the accuracy of the spacers without using the quartz plate 14 with such high precision, and the LCD cell 10 with high precision can be manufactured.

Further, even if the accuracy of the lower glass plate 1 of the LCD cell 10 is poor with respect to the accuracy required for the gap, the error of the lower glass is compensated by the thickness of the first closed space 24. Therefore, the accuracy of the gap can be controlled within the required range.

Further, in the press device 12 of this example,
A second closed space 32 is also formed between the upper glass plate 2 and the upper plate 26 of the LCD cell 10 for pressing. Therefore, with respect to the relationship with the upper plate 26, it is possible to obtain the same effect as that of the surface plate. As described above, by using the pressing device 12 of this example, even if the quartz plate 14 or the upper plate 26 whose accuracy or surface condition is not so good is used, the LCD cell 10 with high accuracy is obtained.
Can be manufactured without causing scratches. Therefore, the press device 12 having high performance can be provided at low cost.

Further, in the pressing device 12 of this example, the first closed space 24 and the second closed space 32 are pressurized so as to have a uniform internal pressure. Therefore, the LC sandwiched between the first closed space 24 and the second closed space 32
A uniform pressure is applied to the D cell 10 from above and below during pressing. Therefore, during pressing, the LCD cell 10 does not deform such as warp. That is, even if the quartz plate 14, which is the surface plate, is deformed at the time of pressurization, the pressure in the first closed space 24 is kept at the same pressure as that in the second closed space 32. The same force as the upper glass plate 2 acts on the glass plate 1. Therefore, the quartz plate 1
High-precision L that is not warped without being affected by the distortion of 4
It is possible to manufacture the CD cell 10.

[Embodiment 2] FIG. 2 shows an aligning and pressing apparatus according to Embodiment 2 of the present invention. The press device 40 of this example includes an XYθ stage 13 that can be aligned in the X, Y and rotation directions, and the ultraviolet light source 6 is installed on the XYθ stage 13. Above the XYθ stage 13, a quartz plate 14 similar to that of the first embodiment is installed as a surface plate.
Similarly to the lower glass plate 1 of the LCD cell 10 via the O-ring 22a, the seal frame 18 and the O-ring 22b.
Is installed on the surface plate. On the other hand, facing the lower glass plate 1, in the upper part of the drawing, the upper plate 44 of the air cylinder 16 is connected to the upper plate 44 through the O-ring 30 as in the first embodiment.
The upper glass plate 2 of the CD cell 10 is installed. Further, the quartz plate 14, the O-ring 22a, the seal frame 18, O
A first closed space 24 formed by the ring 22b and the lower glass plate 1 and a second closed space 32 formed by the upper plate 44, the O-ring 30 and the upper glass plate 2 are formed. These first and second closed spaces are connected to an air source device 46 capable of depressurizing and pressurizing the respective closed spaces. In the state shown in FIG. 2, since the first closed space 24 and the second closed space 32 are kept in a reduced pressure state, the lower glass plate 1 is fixed to the quartz plate 14, The upper glass plate 2 is fixed to the upper plate 44.

The pressing device 40 of this example is a pressing device that also serves as alignment as described above. That is, the quartz glass plate 14 is mounted with the lower glass plate 1 of the LCD panel 10 on which a sealant made of ultraviolet curable ink is printed and spacer spheres are scattered. The lower glass plate 1 is adsorbed and supported on the XYθ stage 13 on which the quartz plate 14 is installed by depressurizing the first closed space 24. On the other hand, in the upper plate 44, the upper glass plate 2 has the second closed space 3
By reducing the pressure of 2, adsorption is supported. And
The upper and lower glass plates are accurately aligned using the XYθ stage 13. After such alignment is performed, the air cylinder 16 is activated to bring the upper and lower glass sheets into contact. The air cylinder 16 then squeezes the upper and lower glass sheets so that an effective sealing effect of the O-ring is obtained.
At the same time, the air source device 46 allows the first closed space 24
And the second closed space 32 is changed from the depressurized state to the pressurized state.

After the alignment is completed in this way, the process of pressing the upper and lower glass plates is started by the same apparatus. In the pressing step, as in the first embodiment, the first and second closed spaces 24 and 3 are formed.
The air source device 46 gradually increases the pressure so that the inner pressures of the two become equal, and the LCD cell 10 is pressed in the same manner as the pressing device of the first embodiment.

As described above, by using the press device 40 of this example, it is possible to perform alignment and pressing with one device. Therefore, it is not necessary to install separate devices for the alignment and the press as in the conventional case, and the mechanism and time for carrying between these devices can be omitted. Further, it is not necessary to temporarily fix the LCD cell. On the other hand, since the LCD cell is pressed in the same manner as the pressing device of the first embodiment, it is possible to manufacture an LCD cell with high accuracy and stable quality. As described above, by using the pressing device 40 of the present example, the productivity of LCD cells can be significantly improved, and it is possible to provide high-precision, high-quality LCD cells at low cost.

Further, in this example, it is also possible to press the upper and lower glass plates in a vertical state.
This makes it possible to eliminate the influence of gravity at the time of pressing, so that it is possible to prevent the occurrence of warpage due to the weight of the glass plate, and it is possible to supply a highly accurate LCD panel. Of course, after performing the alignment in the horizontal plane, it is also possible to rotate the device and perform only the press in the vertical state. Further, in order to perform the alignment, an air cylinder capable of moving the upper glass plate in the XYθ directions may be used instead of the XYθ stage or together with the XYθ stage.

In Examples 1 and 2, an O-ring is used as a sealing material that forms a sealed space between the lower glass plate and the quartz plate or between the upper glass plate and the upper plate. Various sealing means such as a square or round gasket and rubber packing can be adopted. Further, instead of the compressed air source and the air source device, various fluids, for example, gases such as nitrogen and argon can be used. Further, the LCD cell is not limited to the one constituted by the upper and lower glass plates, but may be the TFT.
Even if it is composed of a substrate, a color filter, etc., it can be manufactured accurately and easily by using the above-mentioned pressing device.

[0037]

As described above, in the pressing device and the alignment device for the liquid crystal cell according to the present invention, a layer is provided between the LCD cell to be pressed and the surface of the surface plate by a fluid such as air. I am trying. This makes it possible to apply uniform pressure to the LCD cells without being affected by the finishing accuracy of the surface plate or the surface condition, and without causing problems such as deformation, scratches, or misalignment. LCD cells with high accuracy can be pressed. Therefore, it is possible to provide a low-priced and high-performance press device without having to spend the cost for obtaining a high finishing accuracy or a surface plate having a surface condition.

Further, in the pressing apparatus according to the present invention, since the LCD cell does not come into direct contact with the surface of the surface plate or the like,
Even if the surface plate is deformed by pressure, the LCD cell is not distorted accordingly. Therefore, it is possible to prevent the deformation of the LCD cell, which is likely to occur during pressing, and to reduce the strength of the surface plate. Therefore, LC with high accuracy
It is possible to provide a press device that can manufacture D cells at a lower cost. In order to prevent the deflection of the LCD cell due to its own weight, it is effective to hold the LCD cell in a vertical state and press it.

Further, the surface of the surface plate is closely contacted with L
Since it is not necessary to place the CD cell, it is easy to set the LCD cell at a predetermined position in the pressing device according to the present invention. Further, even after pressing, the LCD cell and the quartz plate do not come into close contact with each other, and therefore the LCD cell can be handled without being scratched. Further, the liquid layer allows the LCD cell to be handled while being adsorbed and can be aligned.
Therefore, it is possible to provide a pressing device that also serves as alignment.

Further, in order to remove static electricity generated during transportation, a conductive sealing material may be used.

As described above, by using the pressing apparatus according to the present invention which facilitates the handling of LCD cells, LC
In the D cell manufacturing process, the alignment and pressing steps can be smoothly performed, productivity is improved, and a high-performance LCD cell can be provided at low cost.

As described above, the pressing device according to the present invention is
The configuration is simple but has many advantages,
It is a very effective device for efficiently manufacturing LCD cells.

[Brief description of drawings]

FIG. 1 is a sectional view showing a schematic configuration of a pressing device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a schematic configuration of a pressing device according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a general configuration example of an LCD cell.

FIG. 4 is a cross-sectional view showing a schematic configuration of a conventional pressing device.

[Explanation of symbols]

 1 ・ ・ Lower glass plate 2 ・ ・ Upper glass plate 3 ・ ・ Liquid crystal sealant 4 ・ ・ Spacer sphere 5 ・ ・ Gap 6 ・ ・ Ultraviolet light source 10 ・ ・ LCD cell (liquid crystal panel) 12 ・ ・ Press device 13 ・ ・ XYθ Stage 14: Transparent quartz plate 16: Air cylinder 18: Seal frame 20, 28: Groove 22, 30: O-ring 24: First sealed space 26: Upper plate 32: Second Airtight space 34 ··· Compressed air source 40 · · Aligning press device 44 · · Upper plate 46 · · Air source device

Claims (4)

[Claims] 1. A predetermined interval for injecting liquid crystal is maintained by pressing a second plate member, which is superposed with a spacer in between, against a first plate member arranged on the surface of a surface plate. In a pressing device for a liquid crystal cell, which adheres these first and second plate members to each other in a state, a sealing means capable of forming a closed space between the surface plate and the first plate member is provided on the surface plate surface. A pressing device for a liquid crystal cell, comprising: a compressed fluid supply means for supplying a compressed fluid to the closed space. 2. A liquid crystal is injected by superposing and pressing a second plate member held by a plate holding means while sandwiching a spacer with respect to a first plate member arranged on the surface of a surface plate. The first of these is kept in a predetermined interval for
And a pressing device for a liquid crystal cell in which the second plate member is attached, the platen surface has sealing means capable of forming a first closed space between the surface and the first plate member. The surface of the plate holding means has second sealing means capable of forming a second closed space between the surface and the second plate member, and further, the first and second sealings A press device for a liquid crystal cell, comprising a compressed fluid supply means for supplying a compressed fluid to a space. 3. A second plate member held by a plate holding means is aligned and superposed on the first plate member arranged on the surface of the surface plate while sandwiching a spacer. By pressing these plate members against each other,
An alignment and pressing device for a liquid crystal cell, in which these first and second plate members are bonded to each other while maintaining a predetermined space for injecting liquid crystal, wherein the surface of the platen and the first plate are A sealing means capable of forming a first closed space between the first plate members, and a second closed space is formed on the surface of the plate holding means between the surface and the second plate member. And a compressed fluid supply control means capable of setting the internal pressures of the first and second closed spaces to a pressurized state and a depressurized state, and further, to the surface plate surface. The platen is supported by a moving table mechanism so that the fixed first plate member can be aligned with the second plate member held by the plate holding means. Alignment for liquid crystal cells And press equipment. 4. An alignment and pressing method for a liquid crystal cell using the alignment and pressing device according to claim 3, wherein the compressed fluid supply control means depressurizes the first and second closed spaces. To support the first and second plate members by suction on the surface plate surface and the surface of the plate holding means, respectively, and drive the moving table mechanism to support the first plate member supported on the surface plate surface. The plate member is aligned with the second plate member held by the plate holding means, the first and second plate members are superposed with a spacer interposed therebetween, and the compressed fluid supply control means An alignment and pressing method characterized in that the first and second hermetically sealed spaces are brought into a pressurized state and the first and second plate members are pressed against each other and bonded together.