JP2001281675A - Production method for liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of defects of seal breaking-off caused in the manufacturing process of the liquid crystal display device. SOLUTION: In a production method for the liquid crystal display device, provided with a process which applies sealing material to any substrate of two substrates, while leaving an opening formation part and a process which puts the substrate into the pressurization chamber, where at least one side of upper and lower surfaces which can seal the periphery by gluing together the substrate via sealing material is constituted of a sheet, evacuates the inside of the chamber, hot-presses the substrate through the sheet by the difference from the atmospheric air and adheres the substrate with the sealing material while separating a fixed interval to form a cell, a dummy pattern, consisting of the sealing material cut partially, is formed near the opening formation part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for manufacturing a liquid crystal display device.

[0002]

2. Description of the Related Art In a manufacturing process of a liquid crystal display device, a dummy pattern of a sealing material is a pattern necessary for suppressing spattering of broken material at the time of cell cutting. Hereinafter, an example of a conventional example will be described with reference to the drawings.

FIG. 2 shows an example of the prior art. In FIG. 2, reference numeral 21 denotes a first substrate, 22 denotes a second substrate, 23 denotes a sealing material, 24 denotes an opening forming portion, and 25 denotes a dummy pattern.

The first substrate 21 and the second substrate 22 are sealed with a sealing material 2
3 and heat and pressurize to seal material 2
In the manufacturing process of the liquid crystal display device including the step of forming the cell by adhering the first and second substrates at a fixed distance from the third, the dummy pattern 25 becomes a continuous linear pattern with respect to the opening forming portion 24. It is configured as follows.

[0005]

However, in the structure of the above-mentioned conventional example, the substrate is placed in a pressurized chamber in which at least one of the upper and lower surfaces capable of sealing the periphery is formed of a sheet, and the inside of the chamber is depressurized to be in contact with the atmosphere. Due to the difference, when the substrate is heated and pressurized through the sheet, the thermally expanded air filled in the cell acts as a lid for the seal dummy pattern near the opening forming portion, hinders exhaust from the opening forming portion, and the sealing material is ruptured. This has the disadvantage that the production is easy and the yield is reduced. In particular, in a substrate on which a plurality of cells are arranged, the distance from the opening forming portion to the dummy pattern is short, and the burst of the sealing material is likely to be remarkable.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. In order to solve the problems caused by the seal rupture occurring in the manufacturing process of the liquid crystal display device, the seal dummy pattern near the opening forming portion is partially cut. Even if the distance from the opening forming portion to the dummy pattern is short in the substrate on which a plurality of cells are arranged, from the opening forming portion, at least one of the upper and lower surfaces capable of sealing the periphery is formed into a pressurized chamber formed of a sheet. When the pressure inside the chamber is reduced and the substrate is heated and pressurized through the sheet by a difference from the atmosphere, the thermally expanded air filled in the cell is released from the gap to suppress the rupture of the sealing material. The purpose is to improve the yield.

[0007]

In order to achieve this object, the present invention provides a step of applying a sealing material to one of two substrates while leaving a portion where an opening is formed, and a step of applying the sealing material to the substrate. The substrate is placed in a pressurized chamber where at least one of the upper and lower surfaces that can seal the surroundings is made of a sheet, and the inside of the chamber is depressurized, and the substrate is heated through the sheet due to a difference from the atmosphere. A method of manufacturing a liquid crystal display device comprising a step of forming a cell by applying pressure and separating and adhering the substrate by a predetermined distance with the sealing material, forming a dummy pattern made of a sealing material near the opening forming portion; A method for manufacturing a liquid crystal display device, wherein a seal material is not provided partially so that a pattern is opened at a position opposite to the opening forming portion.

[0008] In this way, in order to solve the problem caused by the seal rupture that occurs in the manufacturing process of the liquid crystal display device, the seal dummy pattern near the opening forming portion is partially cut, so that at least the upper and lower surfaces of the upper and lower surfaces capable of sealing the periphery can be sealed. One of the substrates is placed in a pressurized chamber composed of a sheet, and when the pressure in the chamber is reduced and the substrate is heated and pressurized through the sheet due to a difference from the atmosphere, the thermally expanded air filled in the cells is filled in the gap. As a result, it is possible to suppress the rupture of the sealing material and to improve the yield.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of an embodiment of the present invention. FIG.
, 11 is a first substrate, 12 is a second substrate, 13 is a sealing material, 14 is an opening forming portion, 15 is a dummy pattern,
Reference numeral 16 denotes an opening forming portion width, 17 denotes a distance from the opening forming portion 14 to the dummy pattern 15, and 18 denotes a part of a line cut out into a plurality of cells.

The first substrate 11 and the second substrate 12 are sealed with the sealing material 1
The substrate is placed in a pressurized chamber in which at least one of the upper and lower surfaces capable of sealing the periphery is made of a sheet, and the inside of the chamber is depressurized, and the substrate is heated through the sheet by a difference from the atmosphere. In a manufacturing process of a liquid crystal display device including a step of forming a cell by pressing and bonding the first substrate 11 and the second substrate 12 to the sealing material by a predetermined distance from the sealing material 13, the dummy pattern 15 is formed in the opening forming portion 1.
4 is configured to be a partially cut pattern.

In the partial cut, the distance 17 from the opening forming portion 14 to the dummy pattern 15 is set to the width 16 of the opening forming portion.
Hereinafter, the cut width of the dummy pattern 15 is set to be equal to or larger than the opening forming portion width 16. The dummy pattern 15 is removed by a cutout line 18 as a blank after the cutout.

As described above, according to the present embodiment, a step of applying a sealing material to one of the two substrates while leaving an opening formed portion, and laminating the substrates via the sealing material Then, the substrate is placed in a pressurized chamber in which at least one of the upper and lower surfaces capable of sealing the periphery is formed of a sheet, and the inside of the chamber is depressurized, and the substrate is heated and pressurized through the sheet according to a difference from the atmosphere to seal the substrate. A method for manufacturing a liquid crystal display device, comprising the steps of: forming a cell by separating the substrate by a predetermined distance with a material and forming a cell, wherein a dummy pattern is provided near the opening forming portion, and the dummy pattern is located at a position opposed to the opening forming portion. The sealant is not provided partially so as to open to the portion. By having a configuration characterized by forming a partially cut dummy pattern made of the above sealing material, the upper and lower surfaces capable of sealing the periphery against defects caused by seal rupture occurring in the manufacturing process of the liquid crystal display device At least one of the substrates is placed in a pressurized chamber composed of a sheet, and the thermally expanded air filled in the cell when the substrate is heated and pressurized through the sheet due to a difference from the atmosphere by depressurizing the chamber is used. By escaping from the gap (opening portion of the dummy pattern opposite to the opening forming portion), rupture of the sealing material can be suppressed and yield can be improved.

[0014]

As described above, according to the present invention, the seal dummy pattern near the opening formation portion is partially cut against the defect caused by the seal rupture that occurs in the manufacturing process of the liquid crystal display device. At least one of the upper and lower surfaces capable of enclosing the substrate is placed in a pressurized chamber composed of a sheet, and the inside of the chamber is filled when the substrate is heated and pressurized through the sheet due to a difference from the atmosphere by reducing the pressure in the chamber. By allowing the thermally expanded air to escape from the gap, it is possible to suppress the rupture of the sealing material and provide an improvement in the yield, which is of great industrial value.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

FIG. 2 is a conventional explanatory diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 1st board | substrate 12 2nd board | substrate 13 Sealing material 14 Opening forming part 15 Dummy pattern 16 Opening forming part width 17 Distance from an opening forming part to a dummy pattern 18 Line cut out into a plurality of cells 21 First substrate 22 Second substrate 23 Seal material 24 Opening forming part 25 Dummy pattern

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H089 KA15 LA29 LA41 NA24 NA25 NA39 NA60 PA16 QA11 QA12 QA14 SA01 TA06 5G435 AA17 BB12 EE33 FF00 HH12 KK05

Claims (4)

[Claims] 1. A step of applying a sealing material to one of two substrates while leaving an opening formed portion, and bonding the substrates via the sealing material to form upper and lower surfaces capable of sealing the periphery. A substrate is placed in a pressurized chamber at least one of which is formed of a sheet, and the inside of the chamber is decompressed, and the substrate is heated and pressurized through the sheet by a difference from the atmosphere, and the substrate is adhered to the substrate by a certain distance by the sealing material. A method of manufacturing a liquid crystal display device including a step of forming a cell, wherein a dummy pattern made of a sealing material is formed near the opening forming portion, and the dummy pattern is opened at a position corresponding to the opening forming portion. A method for manufacturing a liquid crystal display device, wherein a sealing material is not provided partially. 2. A step of applying a sealing material to one of two substrates while leaving an opening formed portion, and a step of bonding the substrates via the sealing material to form upper and lower surfaces capable of sealing the periphery. A substrate is placed in a pressurized chamber at least one of which is formed of a sheet, and the inside of the chamber is decompressed, and the substrate is heated and pressurized through the sheet by a difference from the atmosphere, and the substrate is adhered to the substrate by a certain distance by the sealing material. And forming a plurality of cells between the substrates, and after cutting and separating the plurality of cells, injecting liquid crystal into each cell or injecting liquid crystal into a plurality of cells of the substrate. Thereafter, in the method for manufacturing a liquid crystal display device including a step of cutting out and separating the plurality of cells, a dummy pattern made of a sealing material is formed near the opening forming portion,
A method of manufacturing a liquid crystal display device, wherein a sealing material is not provided partially so that the dummy pattern is opened at a position facing the opening forming portion. 3. The method according to claim 1, wherein when the sealing material is applied to one of the two substrates while leaving the opening forming portion, a dummy pattern is formed outside the cell, and is removed after cutting out the opening forming portion. The method for manufacturing a liquid crystal display device according to claim 1. 4. When the sealing material is applied to one of the two substrates while leaving the opening forming portion, the distance from the opening forming portion to the dummy pattern is set to be equal to or less than the width of the opening forming portion, and the portion of the dummy pattern is formed. 3. The method for manufacturing a liquid crystal display panel according to claim 1, wherein a cut width is equal to or larger than a width of the opening forming portion.