JP3196733B2 - Method and apparatus for forming cell gap in liquid crystal display element cell - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for forming a cell gap of a liquid crystal display element cell.

[0002]

2. Description of the Related Art Conventionally, even if a cell gap of a liquid crystal display element cell (empty cell) before liquid crystal injection is formed to a desired size, the gap expands when liquid crystal is injected into the gap. There is a problem that the cell gap of the cell becomes thicker than the target gap.

[0003] JP-A-6-67136 and JP-A-5-67136
In the prior art disclosed in Japanese Patent No. 313110, in the liquid crystal injection into the gap by the decompression method, the decompression is performed stepwise, so that the occurrence of a defect in the liquid crystal display element cell such as a non-injection defect of the liquid crystal or a defective orientation is caused. It is possible to suppress. However, it is impossible to make the cell gap uniform or to improve the cause of the cell gap becoming thicker than the target thickness. Therefore, in the step of sealing the liquid crystal injection hole, a pressing force is applied to the liquid crystal display element cell to form a final cell gap, and then the liquid crystal injection hole is sealed using a pressure sealing device. In this case, the cell gap was made uniform.

In another conventional technique disclosed in Japanese Patent Application Laid-Open No. 9-90381, as shown in FIG. 12, the cell gap of the liquid crystal display element cell 101 is made uniform and the external force is applied to the liquid crystal display element cell 101. To prevent display defects caused by uneven movement of the spacer 104 in the cell gap. Further, in this prior art, a method is adopted in which the time of liquid crystal injection processing is reduced by reducing the occurrence of the above-mentioned defects by applying a stepwise pressing step as shown in FIG.

[0005]

However, in the prior art disclosed in Japanese Patent Application Laid-Open No. 9-90381, FIG.
As shown in FIG. 4, the liquid crystal display element cell 101 is
Since the pressure is applied by the stepwise pressing force by the buffer material 102 of No. 3, a desired pressing force cannot be instantaneously applied to the liquid crystal display element cell 101. As a result, the specified pressing force may not be obtained. That is, in this prior art, a contact-type pressurizing method of pressing a liquid crystal display element cell through a cushioning material is used. Therefore, as shown in FIG. Even if it is set, the pressure actually applied to the liquid crystal display element cell does not change significantly. Therefore, a difference occurs between the displacement of the pressing pressure and the displacement of the pressure actually applied to the liquid crystal display element cell, and substantially
A cell gap control processing time of ~ 2 hours was required.

When the pressing time is short as in the pressing time (a) shown in FIG. 13, the cell gap does not reach the target gap, and as shown in FIG. The gap is not determined, and when an external force is applied to the liquid crystal display element cell, a display failure occurs due to the movement of the spacer.

When the liquid crystal display element cell 101 is pressed, a certain amount of liquid crystal exudes from the liquid crystal injection hole according to the pressing pressure, and after the liquid crystal exudation is completed, the liquid crystal injection hole is sealed. However, when the pressing time at the predetermined pressing pressure is short as described above, the liquid crystal injection hole is sealed without exuding the liquid crystal, and the liquid crystal is filled in the sealing material 105 as shown in FIG. Poor sealing such as leakage occurs. Therefore, the liquid crystal injection hole is sealed after the exudation of the liquid crystal is completed by performing long-time pressing such as the pressing time (b) shown in FIG. The liquid crystal was prevented from leaking (see FIG. 18). However, in this case, there is a disadvantage that the processing time of the sealing step is lengthened.

Accordingly, an object of the present invention is to provide a method and apparatus for forming a cell gap of a liquid crystal display element cell, which can form a cell gap of the liquid crystal display element cell uniformly in a shorter time.

[0009]

In order to achieve the above object, a method for forming a cell gap of a liquid crystal display element cell according to the present invention comprises: a liquid crystal in which liquid crystal is injected from a liquid crystal injection hole provided in the liquid crystal display element cell; A method for forming a cell gap of a display element cell to a desired thickness, comprising forming a closed space covering the liquid crystal display element cell, and applying a pressure to the closed space so that the pressure in the closed space increases stepwise. Pressing the liquid crystal display element cell by supplying a pressurized gas ,
After that, a pressure approximately half of the maximum pressing pressure in the pressing step
Pressing the liquid crystal display element cell with
It is characterized by.

According to the present invention, since the liquid crystal display element cell is pressed by the pressurized gas, the cushioning material is used even if the pressing profile of the liquid crystal display element cell is set such that the pressing pressure changes stepwise and steeply. Unlike when you press
The liquid crystal display element cell can be significantly pressed.
As a result, the thickness of the cell gap can be formed to a target thickness in a short time.

Further, a closed space is formed to cover the liquid crystal display element cell, and a pressurized gas is supplied to the closed space to press the liquid crystal display element cell so that the pressure in the closed space increases stepwise. After the step, the liquid crystal display element cell is pressed at a pressure approximately half the maximum pressing pressure in the pressing step, so that the liquid crystal seepage from the liquid crystal injection hole is stopped in a short time. Is done.

Further, it is preferable that the method further includes a step of applying a sealing material for sealing the liquid crystal injection hole to the liquid crystal injection hole.

Further, after the step of applying a sealing material for sealing the liquid crystal injection hole to the liquid crystal injection hole, the liquid crystal is filled with a pressure smaller than approximately half of the maximum pressing pressure. With the structure including the step of pressing the display element cell, a part of the sealing material is drawn into the liquid crystal injection hole, and the liquid crystal injection hole is more effectively sealed.

Further, the sealing material may be made of an ultraviolet curable material which cures when irradiated with ultraviolet rays, and the method may further comprise a step of irradiating the sealing material with ultraviolet light to cure the sealing material. Good.

The cell gap forming apparatus for a liquid crystal display element cell according to the present invention is arranged such that the cell gap of a liquid crystal display element cell into which liquid crystal is injected from a liquid crystal injection hole provided in the liquid crystal display element cell has a desired thickness. A holding means for holding the liquid crystal display element cell with a sealed space formed between the liquid crystal display element cell and the liquid crystal display element cell; A liquid crystal display element cell pressing means having a pressurized gas supply means and a pressure control means for changing a pressure of the pressurized gas in the closed space stepwise is provided.

Thus, even if the pressure profile of the liquid crystal display element cell is set such that the pressure changes stepwise and steeply, the liquid crystal display element cell can be remarkably pressed. Is optimally performed.

Further, the control device of the present invention includes a wiping means for wiping liquid crystal oozing out of the liquid crystal injection hole, and a sealing material for sealing the liquid crystal injection hole in the liquid crystal injection hole. It is preferable to provide a structure provided with a sealing material applying means for applying the sealing material.

Further, the sealing material is made of an ultraviolet curable material which cures when irradiated with ultraviolet light, and an ultraviolet light lamp for irradiating the sealing material with ultraviolet light to cure the sealing material. May be provided.

[0019]

Next, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 is an overall structural view showing a first embodiment of a cell gap forming apparatus for a liquid crystal display element cell according to the present invention, and FIG. 2 is a view showing the liquid crystal display element cell shown in FIG. FIG. 3 is a perspective view showing a pressing mechanism of the cell gap forming apparatus.
FIG. 2 is a cross-sectional view showing a pressing mechanism of the cell gap forming device of the liquid crystal display element cell shown in FIG.

As shown in FIG. 1, a liquid crystal display element cell 2 of a liquid crystal display element cell according to the present embodiment (hereinafter, referred to as a “cell gap forming apparatus 1”) is provided.
Is provided with a pressing mechanism 3 for forming the cell gap of the liquid crystal display element cell 2 with high precision and high quality by pressing the liquid crystal display element cell 2. The pressing mechanism 3 is a mechanism including a cylinder 4 having a diameter of 10 mm, a gas introduction hose 5 (see FIG. 2), plates 6 and 7 serving as holding means for holding the liquid crystal display element cell 2, and a pressure controller 8. .

Further, the cell gap forming apparatus 1 is provided with an arm which expands and contracts together with the cylinder 4 of the pressing mechanism 3, and a rotating mechanism 9 for switching the arrangement of the pressing mechanism 3 between a horizontal direction and a vertical direction for each operation. And a wiping mechanism 10 for wiping the liquid crystal that has oozed out of the liquid crystal injection hole 2a (see FIG. 2) of the liquid crystal display element cell 2 by bringing a roll-shaped wipe material into contact with the liquid crystal injection hole 2a, and an ultraviolet curing material. The sealing material (not shown) is filled with a liquid crystal injection hole 2 by a dispenser 11.
a, an ultraviolet light lamp 13 for emitting ultraviolet light (wavelength: 330 to 380 nm) for curing the sealing material applied to the liquid crystal injection hole 2a of the liquid crystal display element cell 2, and a diameter. And a moving mechanism 14 that moves the pressing mechanism 3 with respect to each of the above mechanisms by driving a ball screw 14a having a length of 5 mm with a motor.

Next, the pressing mechanism 3 of the cell gap forming apparatus 1 will be described with reference to FIG. 2 or FIG.

Each of the plates 6 and 7 of the pressing mechanism 3 is made of stainless steel, and each of the plates 6 and 7 has a Z-shaped gas-tight seal 17 made of viton material.
Is provided. When the liquid crystal display element cell 2 is sandwiched between the plates 6 and 7, a closed space 18 is formed between each plate 6 and 7 and the liquid crystal display element cell 2.

Further, each of the plates 6 and 7 is connected to a gas introduction hose 15 for supplying a pressurized gas for pressing the display surface of the liquid crystal display element cell 2 to the closed space 18, and a gas introduction hose. Gas introduction holes 16 are provided for allowing the pressurized gas supplied from the hose 15 to flow into each closed space 18. The gas introduction hose 15 and the gas introduction hole 16 constitute a pressurized gas supply unit that supplies a pressurized gas to the closed space 18. The pressure of the pressurized gas in the closed space 18 is adjusted by a pressure controller 8 (see FIG. 1) which is a pressure control means provided in the pressing mechanism 3.

As shown in FIG. 4, the liquid crystal display element cell 2 is closed by the pressing mechanism 3 configured as described above.
8 is pressed by the pressurized gas supplied.

Next, the operation of the cell gap forming apparatus 1 described above will be described mainly with reference to FIGS.

First, a liquid crystal display element cell 2 in which liquid crystal injection has been completed is prepared (S1).

Next, using the attachment / detachment mechanism, with the display surface of the liquid crystal display element cell 2 horizontal,
Is set on the pressing mechanism 3 (S2).

Subsequently, the cylinder 4 of the pressing mechanism 3 is driven, and the gas-tight seal 17 provided on each of the plates 6 and 7 is brought into contact with the liquid crystal display element cell 2 set in the pressing mechanism 3 to apply pressure. A closed space 18 into which gas flows is formed (S3).

Next, the liquid crystal injection hole 2 of the liquid crystal display element cell 2
a rotating mechanism 9 having a telescopic arm for wiping liquid crystal oozing out of a, applying a sealing material, and irradiating ultraviolet light.
To bring the liquid crystal display element cell 2 into a vertical state (S
4).

Next, using the pressure controller 8 having an accuracy of 0.05 kgf / cm ² , pressurized gas (high-pressure air) is caused to flow into the closed space 18 to start pressing the liquid crystal display element cell 2 (S 5). ). As shown in FIG. 6, the pressing profile is divided into three stages, and in the first stage, the third
Pressing is performed at a pressure of 1/4 to 1/5 of the pressure of the stage for 1 to 3 minutes, and in the second stage, 1/2 to 1/1 / of the pressure of the third stage
Pressing is performed at a pressure of 3 for 1 to 5 minutes, and in the third stage, pressing is performed at a pressure of 0.4 to 0.6 kgf / cm ² for 10 to 20 minutes. In addition, 30 seconds before the end of the first and second pressing stages, the liquid crystal that has exuded from the liquid crystal injection hole 2a is wiped by the liquid crystal wiping mechanism 10 (S6, S7).

When the third stage pressing operation is completed (S
8) The liquid crystal that has exuded from the liquid crystal injection hole 2a of the liquid crystal display element cell 2 is wiped by the wiping mechanism 10 (S9).

Next, the pressing pressure is set to １ ／ of the pressure in the third stage.
(0.2-0.3 Kgf / cm ² ), and pressing of the liquid crystal for 5 minutes stops liquid crystal spotting from the liquid crystal display element cell 2 (S10).

Next, the moving mechanism 14 is driven to move the pressing mechanism 3 to a position where the sealing material can be applied (S1).
1).

Next, an appropriate amount of sealing material is applied to the liquid crystal injection hole 2a of the liquid crystal display element cell 2 by the dispenser 11 of the sealing material application mechanism 12 (S12).

Next, the liquid crystal display element cell 2 is pressed.
Pressure (0.2-0.3Kgf / cm ^Two) To 0.15Kg
f / cm^TwoAnd press for 10-20 minutes
Then, an appropriate amount (about 2 mm) applied to the liquid crystal injection hole 2a^Three)of
After a part of the sealing material is drawn into the liquid crystal display element cell 2
(S13), leave the liquid crystal display element cell 2 for a certain period of time
(S14).

Next, the moving mechanism 14 is driven to move the pressing mechanism 3 to a position where the ultraviolet light emitted from the ultraviolet light lamp 13 is irradiated (S15).

Next, the wavelength 330
The sealing material made of an ultraviolet-curable resin is cured by irradiating ultraviolet light having a wavelength of 100 to 150 W (S16).

Next, the moving mechanism 14 is driven, the pressing mechanism 3 is moved to a position where the liquid crystal display element cell 2 can be detached, and the rotating mechanism 9 is driven to bring the liquid crystal display element cell 2 into a horizontal state (S17). .

Finally, the cylinder 4 of the pressing mechanism 3 is driven to take out the liquid crystal display element cell 2 (S18). Through the above steps, the step of forming the gap of the liquid crystal display element cell 2 is completed.

As described above, the cell gap forming apparatus 1 of this embodiment has a structure in which the liquid crystal display element cell 2 is pressed by the pressurized gas. Therefore, as shown in FIG. 7, even when the pressing profile of the liquid crystal display element cell is set such that the pressing pressure changes stepwise and steeply, the liquid crystal display element cell 2 is remarkably different from the case where the pressing is performed using the cushioning material. Can be pressed. As a result, the thickness of the cell gap can be formed to the target thickness in a short time of about 15 to 30 minutes.

Further, in this embodiment, the maximum pressure (third pressure)
By pressing the liquid crystal display element cell 2 with half the pressure of the liquid crystal display element cell 2, the liquid crystal injection hole 2 of the liquid crystal display element cell 2 is pressed.
Since liquid crystal seepage from a is stopped in a short time, a cell gap free from defective sealing can be formed in a short time.

When the liquid crystal display element cell 2 is pressed with a pressure smaller than half the maximum pressure, a part of the sealing material is drawn into the liquid crystal injection hole 2a. 2a can be better sealed.

(Second Embodiment) FIG. 8 is an overall configuration diagram showing a second embodiment of a cell gap forming apparatus for a liquid crystal display element cell according to the present invention, and FIG. 9 is a view of the liquid crystal display element cell shown in FIG. FIG. 1 is a perspective view showing a pressing mechanism of the cell gap forming apparatus.
0 is a sectional view showing a pressing mechanism of the device for forming a cell gap of the liquid crystal display element cell shown in FIG.

As shown in FIG. 8, a liquid crystal display element cell 22 is pressed by a liquid crystal display element cell 22 in a liquid crystal display element cell 21 (hereinafter, referred to as a "cell gap forming apparatus 21"). A pressing mechanism 23 for forming the cell gap of the display element cell 22 with high precision and high quality is provided. The pressing mechanism 23 includes a cylinder 24 having a diameter of 10 mm, a gas introduction hose 25 (see FIG. 9), a plate 26 a serving as a holding means for holding the liquid crystal display element cell 2,
26b, a plurality of intermediate plates 27, and a mechanism including a pressure controller 28.

Further, the cell gap forming device 21 includes:
A rotation mechanism 29 that includes an arm that expands and contracts with the cylinder 24 of the above-described pressing mechanism 23, and switches the arrangement of the pressing mechanism 23 between a horizontal direction and a vertical direction for each operation; and a liquid crystal injection hole 22a ( (See FIG. 9) The wiping mechanism 30 for wiping the liquid crystal that has oozed out by bringing a roll-shaped wiping material into contact with the liquid crystal injection hole 22a, and a sealing material (not shown) made of an ultraviolet curable material are dispensed by the dispenser 31. Sealing material application mechanism 32 for applying to injection hole 22a
And ultraviolet light (wavelength 330 to 380) for curing the sealing material applied to the liquid crystal injection hole 22a of the liquid crystal display element cell 22.
nm), and an ultraviolet light lamp 33 emitting 5 mm in diameter.
By driving the ball screw 34a which is
A moving mechanism 34 for moving the pressing mechanism 23 with respect to each of the above mechanisms is provided.

Next, the pressing mechanism 23 of the cell gap forming device 21 will be described with reference to FIG. 9 or FIG.

Each plate 26a, 26b of the pressing mechanism 23
The plurality of intermediate plates 27 are made of stainless steel, and Z-shaped gas-tight seals 37 made of viton material are provided on one surface of each of the plates 26a and 26b and on both surfaces of the intermediate plate 27. The plurality of intermediate plates 27 are arranged between the plates 26a and 26b, and the liquid crystal display element cells 22 are sandwiched between the plates. When the liquid crystal display cell 22 is sandwiched between the plates, a closed space 38 is formed between the plate and the liquid crystal display cell 22.

Further, each plate is connected to a gas introducing hose 35 for supplying a pressurized gas for pressing the display surface of the liquid crystal display element cell 22 to the closed space 38 and is connected to the gas introducing hose 35. Gas introduction holes 36 for allowing the supplied pressurized gas to flow into each closed space 38
Is provided. The gas introduction hose 35 and the gas introduction hole 36 constitute a pressurized gas supply unit that supplies a pressurized gas to the closed space 38. The closed space 38
The pressure of the pressurized gas in the inside is adjusted by a pressure controller 28 (see FIG. 8) which is a pressure control means provided in the pressing mechanism 23.

The liquid crystal display element cell 22 is pressed by the pressurized gas supplied to each closed space 28 between each plate and the liquid crystal display element cell 22 by the pressing mechanism 23 configured as described above.

Next, the operation of the cell gap forming apparatus 21 described above will be described mainly with reference to FIGS.

First, a plurality of liquid crystal display element cells 22 in which liquid crystal injection has been completed are prepared (S21).

Next, each liquid crystal display element cell 22 is set on the pressing mechanism 23 with the display surface of each liquid crystal display element cell 22 being horizontal using an attaching / detaching mechanism (S22).

Subsequently, the cylinder 24 of the pressing mechanism 23 is driven, and the gas-tight seal 3 provided on each plate is provided.
7 is brought into contact with each of the liquid crystal display element cells 22 set in the pressing mechanism 23, and a closed space 38 into which a pressurized gas is introduced.
Is formed (S23).

Next, a rotating mechanism 29 having a telescopic arm is driven in order to wipe the liquid crystal oozing out from the liquid crystal injection hole 22a of each liquid crystal display element cell 22, apply a sealing material, and irradiate ultraviolet light. Each liquid crystal display element cell 22 is set in a vertical state (S24).

Next, by using a pressure controller 28 having an accuracy of 0.05 kgf / cm ² , a pressurized gas (high-pressure air) is caused to flow into the closed space 38 and each liquid crystal display cell 22
Is started (S25). In this embodiment, as shown in FIG. 6, the pressing profile is divided into three stages, and in the first stage, the pressure is １ to 1 of the pressure in the third stage.
Pressing is performed at a pressure of 分 間 for 1 to 3 minutes, at a second stage, pressing is performed at a pressure of ２〜 to 段 階 of the third stage for 1 to 5 minutes, and at a third stage, 0.4 is pressed. Pressing is performed at a pressure of 0.6 kgf / cm ² for 10 to 20 minutes. In addition, 30 seconds before the end of the first and second pressing steps, the liquid crystal injection hole 22 is closed.
The liquid crystal seeping out of a is wiped all together by the liquid crystal wiping mechanism 30 (S26, S27).

After the third stage pressing operation is completed (S2
8) The liquid crystal seeping out from the liquid crystal injection hole 22a of each liquid crystal display element cell 22 is collectively wiped by the wiping mechanism 30 (S
29).

Next, the pressing pressure is set to １ ／ of the pressure in the third stage.
(0.2 to 0.3 Kgf / cm ² ), and by pressing for 5 minutes, the liquid crystal display cell 22 stops stopping liquid crystal spotting (S30).

Next, the moving mechanism 34 is driven to move the pressing mechanism 23 to a position where the sealing material can be applied (S3).
1).

Next, the liquid crystal injection hole 2 of each liquid crystal display element cell 22 is controlled by the dispenser 31 of the sealing material applying mechanism 32.
An appropriate amount of sealing material is applied to 2a (S32).

Next, the pressure (0.2 to 0.3 kgf / cm ² ) pressing each liquid crystal display element cell 22 is set to 0.15.
Kgf / cm ² and press for 10 to 20 minutes to obtain an appropriate amount (about 2 mm) applied to the liquid crystal injection hole 22a.
³ ) After a part of the sealing material is drawn into each liquid crystal display element cell 22 (S33), each liquid crystal display element cell 22 is left for a certain time (S34).

Next, the moving mechanism 34 is driven to move the pressing mechanism 23 to a position where the ultraviolet light emitted from the ultraviolet light lamp 33 is irradiated (S35).

Next, a wavelength 330 from the ultraviolet light lamp 33 is used.
The sealing material made of an ultraviolet-curable resin is cured by irradiating ultraviolet light having a wavelength of 100 nm to 150 W (S36).

Next, the moving mechanism 34 is driven, the pressing mechanism 23 is moved to a position where the liquid crystal display element cell 22 can be attached and detached, and the rotating mechanism 29 is driven to bring the liquid crystal display element cell 22 to a horizontal state (S37). .

Finally, the cylinder 24 of the pressing mechanism 23 is driven to take out the liquid crystal display element cell 22 (S38).
Through the above steps, the step of forming the gap of the liquid crystal display element cell 22 is completed.

As described above, the cell gap forming device 21 of the present embodiment is also configured to press the liquid crystal display element cell 22 with the pressurized gas, and therefore, as shown in FIG. Even if a pressing profile is set in which step changes steeply, the liquid crystal display element cell 22 can be pressed remarkably unlike the case where a buffer is used. As a result, the thickness of the cell gap is substantially reduced from 15 minutes to 30 minutes.
The target thickness can be formed in a short time of about a minute.

Further, in the present embodiment, the liquid crystal display element cell 22 is pressed with half the pressure of the maximum pressure (the third stage of pressure) to stop the liquid crystal seepage from the liquid crystal display element cell 22. Since a process is included, a cell gap free from defective sealing can be formed in a short time.

Further, by pressing the liquid crystal display element cell 22 with a pressure smaller than half the maximum pressure,
Since a part of the sealing material is drawn into the liquid crystal injection hole 22a, the liquid crystal injection hole 22a can be better sealed.

In addition, according to the configuration of the present embodiment, a plurality of liquid crystal display element cells 22 can be simultaneously pressed, so that the productivity of the liquid crystal display element cells can be further improved.

[0071]

As described above, according to the present invention,
Since the liquid crystal display element cell into which liquid crystal is injected is pressed by the pressurized gas whose pressure is increased stepwise, the pressing profile of the liquid crystal display element cell is set so that the pressing pressure changes stepwise and steeply. Also, the liquid crystal display element cell can be pressed remarkably, and the thickness of the cell gap of the liquid crystal display element cell can be formed to a target thickness in a short time.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a first embodiment of a cell gap forming device for a liquid crystal display element cell of the present invention.

FIG. 2 is a perspective view showing a pressing mechanism of the cell gap forming device of the liquid crystal display element cell shown in FIG.

FIG. 3 is a cross-sectional view showing a pressing mechanism of the cell gap forming device of the liquid crystal display element cell shown in FIG.

FIG. 4 is a diagram showing the pressing mechanism shown in FIG. 1 and the like in a state where a liquid crystal display element cell is being pressed.

FIG. 5 is a process chart showing an operation process of the cell gap forming apparatus shown in FIG. 1;

FIG. 6 is a graph showing a pressing profile by the pressing mechanism shown in FIG. 1 and the like.

FIG. 7 is a graph showing a relationship between a pressing profile by a pressing mechanism shown in FIG. 1 and a cell gap formed.

FIG. 8 is an overall configuration diagram showing a second embodiment of a cell gap forming apparatus for a liquid crystal display element cell according to the present invention.

9 is a perspective view showing a pressing mechanism of the cell gap forming device of the liquid crystal display element cell shown in FIG.

FIG. 10 is a sectional view showing a pressing mechanism of the cell gap forming device of the liquid crystal display element cell shown in FIG.

FIG. 11 is a process chart showing an operation process of the cell gap forming apparatus shown in FIG. 8;

FIG. 12 is a diagram showing a relationship between a cell gap and a spacer in a conventional liquid crystal display element cell.

FIG. 13 is a graph showing a pressing profile in a cell gap forming step of a conventional liquid crystal display element cell.

FIG. 14 is a diagram illustrating a conventional pressing mechanism in a state where a liquid crystal display element cell is pressed.

FIG. 15 is a graph showing a relationship between a pressing profile by a conventional pressing mechanism and a formed cell gap.

FIG. 16 is a diagram showing a relationship between a cell gap and a spacer in a conventional liquid crystal display element cell.

FIG. 17 is a view showing a liquid crystal injection hole of a conventional liquid crystal display element cell in a state where liquid crystal has permeated a sealing material.

FIG. 18 is a view showing a liquid crystal injection hole of a conventional liquid crystal display element cell in a state where it is sealed with a sealing material.

[Explanation of symbols]

 1,21 cell gap forming device 2,22 liquid crystal display element cell 3,23 pressing mechanism 4,24 cylinder 6,7,26a, 26b plate 8,28 pressure controller 9,29 rotating mechanism 10,30 wiping mechanism 11,31 Dispenser 12, 32 Sealing material application mechanism 13, 33 Ultraviolet light lamp 14, 34 Moving mechanism 15, 35 Gas introduction hose 16, 36 Gas introduction hole 17, 37 Gas tight seal 18, 38 Closed space 27 Intermediate plate

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-324823 (JP, A) JP-A-2-124525 (JP, A) JP-A-3-73930 (JP, A) JP-A-6-324 347803 (JP, A) JP-A-7-43729 (JP, A) JP-A-7-104306 (JP, A) JP-A-7-218886 (JP, A) JP-A-6-337429 (JP, A) JP-A-10-3083 (JP, A) JP-A-7-218885 (JP, A) JP-A-8-262464 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02F 1/1339 G02F 1/13 101

Claims (4)

(57) [Claims] 1. A method for forming a cell gap of a desired thickness in a liquid crystal display element cell into which liquid crystal is injected from a liquid crystal injection hole provided in the liquid crystal display element cell. step sealed space is formed, for pressing the sealing pressurized gas is supplied to the space above the liquid crystal display element cell as pressure increases stepwise in said enclosed space covering
And thereafter, about 1 / max of the maximum pressing pressure in the pressing step.
Pressing the liquid crystal display element cell with a pressure of 2.
A method of forming a cell gap of a liquid crystal display element cell. 2. The liquid crystal injection hole is sealed with the liquid crystal injection hole.
2. The method according to claim 1 , further comprising the step of applying a sealing material for the cell gap. 3. The liquid crystal injection hole is sealed with the liquid crystal injection hole.
After the step of applying a sealing material for the
The liquid crystal display at a pressure less than approximately half the pressure
3. The method according to claim 2, further comprising the step of pressing the element cell. 4. The sealing material is cured when irradiated with ultraviolet rays.
Composed of a UV curable material,
Irradiating the sealing material to cure the sealing material
Item 4. The method for forming a cell gap of a liquid crystal display element cell according to Item 3 .