JP2003114441A - Manufacturing method and manufacturing device for liquid crystal display element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deviation in position in a process for forming a uniform gap by pressurization, vacuum-package and the like after two electrode substrates are stuck to each other with good precision. SOLUTION: In a method of manufacturing liquid crystal display element including a stage for sticking the two electrode substrates 3 and 4 to each other using UV curing resin, a sealing part 2 of the UV curing resin forming an area necessary for the product is provided between the electrode substrates 3 and 4, a dummy sealing part 1 of the UV curing resin is provided at an area except the area necessary for the product between the electrode substrates 3 and 4, the two electrode substrates 3 and 4 are stuck to each other and then at least two parts of the dummy sealing part 1 are irradiated with UV to form the gap between the two electrode substrates 3 and 4 in the cured state of the dummy sealing part 1. The dummy sealing part 1 is partially cured by partially irradiating the dummy sealing part 1 provided in the area except the area necessary for the product with UV and deviation in position can be prevented in the post-stage for forming the uniform gap by pressurization, vacuum-package and the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing method and a manufacturing apparatus of a liquid crystal display element which is widely used as a display device for portable terminal equipment, audio visual equipment and the like.

[0002]

2. Description of the Related Art In recent years, a liquid crystal display device for displaying an image by driving a liquid crystal display element has advantages of low power consumption, thinness and lightness as a display device for portable terminal equipment, audio visual equipment and the like. Is widely used.

In a liquid crystal display device of a liquid crystal display device which is widely used as a display device for such portable terminal equipment and audio-visual equipment, a method of manufacturing a liquid crystal display element using an ultraviolet curing resin has two electrodes. After the substrates are bonded to each other with high accuracy, a uniform gap is formed by pressing or vacuum packing, and then the sealing resin is cured by irradiating with ultraviolet rays.

FIG. 2 is a cross-sectional view showing a laminating step in a conventional method for manufacturing a liquid crystal display element. In FIG. 2, 9 is a seal part, 10 is a dummy seal part, and 11 and 12.
Is an electrode substrate, 13 is an upper surface plate, and 14 is a lower surface plate. When the two electrode substrates 11 and 12 are bonded by using the ultraviolet curable resin, the electrode substrate 11 and 12 is provided with the ultraviolet curable resin seal portion 9 that forms a region required for the product, and the area other than the region required for the product is provided. The dummy seal portion 10 made of ultraviolet curable resin is provided,
Two electrode substrates 11 and 12 by a pair of surface plates 13 and 14
Stick together.

[0005]

However, in the manufacturing method as described above, after the two electrode substrates are accurately bonded, the positional deviation is caused in the process of forming a uniform gap by pressing or vacuum packing. I had a problem.

Therefore, an object of the present invention is, in order to solve the above-mentioned conventional problems, a process of accurately bonding two electrode substrates and then forming a uniform gap by pressing or vacuum packing. It is an object of the present invention to provide a manufacturing method and a manufacturing apparatus of a liquid crystal display element capable of preventing the positional deviation.

[0007]

In order to achieve the above object, a method for manufacturing a liquid crystal display element according to claim 1 of the present invention includes a step of adhering two electrode substrates using an ultraviolet curable resin. A method of manufacturing a liquid crystal display device, wherein the electrode substrate is provided with a seal portion of the ultraviolet curable resin forming a region necessary for a product, and a dummy seal portion of the ultraviolet curable resin is provided in a region other than a region necessary for a product, After bonding the two electrode substrates, at least two of the dummy seal parts are attached.
Ultraviolet rays are applied to more than one place to form a gap between the two electrode substrates in a state where the dummy seal portion is partially cured.

In this way, the electrode substrate is provided with the ultraviolet-curable resin seal portion that forms the region required for the product, and the ultraviolet-curable resin dummy seal portion is provided outside the region required for the product. After bonding, at least two places of the dummy seal part are irradiated with ultraviolet rays to form a gap between the two electrode substrates while the dummy seal part is partially cured. By partially irradiating the dummy seal part with ultraviolet rays, the dummy seal part is partially cured, and the misalignment is prevented in the subsequent step of forming a uniform gap by pressing or vacuum packing. Is possible.

According to a second aspect of the present invention, there is provided a method of manufacturing a liquid crystal display element according to the first aspect of the present invention.
An acrylic resin is used as the ultraviolet curable resin. As described above, by using the acrylic resin as the ultraviolet curable resin, the acrylic resin can form the dummy seal portion together with the seal portion.

According to a third aspect of the present invention, there is provided a method for producing a liquid crystal display element according to the first aspect, wherein
Urethane resin is used as the UV curable resin. In this way, since the urethane resin is used as the ultraviolet curable resin,
The dummy seal portion can be formed together with the seal portion by using urethane type resin.

According to a fourth aspect of the present invention, there is provided a method for producing a liquid crystal display element according to the first aspect, wherein
A silicone resin is used as the ultraviolet curable resin. Since the silicone resin is used as the ultraviolet curable resin in this manner, the dummy seal portion can be formed together with the seal portion with the silicone resin.

According to a fifth aspect of the present invention, there is provided a liquid crystal display device manufacturing apparatus, which has a seal portion of an ultraviolet curable resin that forms a region necessary for a product, and has a dummy seal portion of the ultraviolet curable resin in a region other than a region necessary for the product. At least two of the dummy seal parts are provided with a pair of surface plates for bonding two electrode substrates together.
Holes for irradiating ultraviolet rays were provided at the positions of the surface plate corresponding to the above positions.

As described above, a pair of two electrode substrates having the seal portion of the ultraviolet curable resin forming the area necessary for the product and the dummy seal portion of the ultraviolet curable resin other than the area necessary for the product are bonded together. Since the surface plate is provided, and holes for irradiating ultraviolet rays are provided at the positions of the surface plate corresponding to at least two positions of the dummy seal portion, the two electrode substrates are bonded with the pair of surface plates. By irradiating ultraviolet rays from the hole with, the ultraviolet rays are partially irradiated and the dummy seal portion can be partially cured.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a cross-sectional view showing a bonding step of a method for manufacturing a liquid crystal display element according to an embodiment of the present invention, which is provided in a region other than a region necessary for a product after accurately bonding two electrode substrates. The process of irradiating a part of the dummy seal portion with ultraviolet rays is shown.

The manufacturing apparatus used in the bonding step is shown in FIG.
As shown in FIG. 3, the substrate bonding machine has a built-in ultraviolet irradiation device 8 and has an ultraviolet curable resin seal portion 2 that forms a region necessary for a product. It is provided with a pair of surface plates 5 and 6 for sticking together two electrode substrates 3 and 4 having a dummy seal portion 1. Further, since a part of the dummy seal part 1 is cured by the ultraviolet irradiation device 8, at least 2 of the dummy seal part 1 is cured.
Holes 7 for irradiating ultraviolet rays are provided at the positions of the surface plate 5 corresponding to the above positions.

Next, a method of manufacturing the liquid crystal display element will be described. As described above, the step of adhering the two electrode substrates 3 and 4 using the ultraviolet curable resin is included. That is, the electrode substrate 3, 4 is provided with a seal portion 2 of an ultraviolet curable resin that forms an area required for the product, and a dummy seal portion 1 of the ultraviolet curable resin is provided in an area other than the area required for the product. After accurately bonding the electrode substrates 3 and 4 of No. 3, at least two or more places of the dummy seal portion 1 are irradiated with ultraviolet rays, and the dummy seal portion 1 is partially cured, Gap formation is performed. At this time, through the upper surface plate 5 of the laminating machine in which the holes 7 for partially irradiating the ultraviolet rays are provided in advance, at least at two or more places of the dummy seal part 1 provided in a region other than the region necessary for the product, Partially irradiated with ultraviolet light to cure. At this time, in the state where the substrates are bonded together, a sufficient gap has not been formed yet, so the dummy seal portion 1 is partially cured. That is, if the main seal portion 2 to be a product is partially cured at this point, it becomes defective. Since some dummy seal parts 1 are also close to the main seal part 2, strictly speaking, the dummy seal part 1 is separated from the main seal part 2 by about 10 mm or more.
It is desirable to partially cure the.

After that, a uniform gap is formed by pressurization or vacuum packing, and all the seal parts 1 and 2 including the dummy seal part are irradiated with ultraviolet rays to be cured.

When the liquid crystal display element manufactured by the method for manufacturing a liquid crystal display element of this embodiment was confirmed, it was confirmed that the liquid crystal display element had no positional deviation.

As described above, the two electrode substrates 3,
By precisely bonding 4 to each other, at least two or more places of the dummy seal part 1 provided in a region other than the region necessary for the product are partially irradiated with ultraviolet rays and the dummy seal is partially cured, It is possible to manufacture a liquid crystal display element without positional displacement.

An acrylic resin, a urethane resin or a silicone resin can be used as the ultraviolet curable resin. The hole 7 may be provided in at least one of the upper and lower surface plates 5 and 6.

[0021]

According to the method of manufacturing a liquid crystal display device according to the first aspect of the present invention, the electrode substrate is provided with a seal portion of an ultraviolet curable resin for forming a region required for a product, and the region other than the region required for the product is provided. Provide a dummy seal part of UV curable resin, 2
Necessary for the product because after bonding the two electrode substrates, at least two places of the dummy seal part are irradiated with ultraviolet rays to form a gap between the two electrode substrates while the dummy seal part is partially cured. By partially irradiating the dummy seal part provided in areas other than the above area with ultraviolet rays, the dummy seal part is partially cured, and in the process of forming a uniform gap with subsequent pressure or vacuum packing, It is possible to prevent the deviation. As a result, it is possible to omit the step of reducing the defect rate of the positional deviation or confirming the positional deviation.

In the second aspect, by using the acrylic resin as the ultraviolet curable resin, the dummy seal portion can be formed together with the seal portion by using the acrylic resin.

In the third aspect, since the urethane resin is used as the ultraviolet curable resin, the urethane resin can form the dummy seal portion together with the seal portion.

According to the fourth aspect, since the silicone resin is used as the ultraviolet curable resin, the dummy seal portion can be formed together with the seal portion with the silicone resin.

According to the manufacturing apparatus of the liquid crystal display element of the fifth aspect of the present invention, there is provided a seal portion of the ultraviolet curable resin forming a region required for the product, and the ultraviolet curable resin is provided in the region other than the region required for the product. Since a pair of surface plates for bonding two electrode substrates each having a dummy seal portion are provided, and holes for irradiating ultraviolet rays are provided at positions of the surface plate corresponding to at least two positions of the dummy seal portion, By irradiating ultraviolet rays through the holes in a state where the pair of electrode substrates are bonded together by a pair of surface plates, the ultraviolet rays can be partially irradiated and the dummy seal portion can be partially cured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing steps of a method for manufacturing a liquid crystal display element according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing steps of a method for manufacturing a liquid crystal display element in a conventional example.

[Explanation of symbols]

1,9 Dummy seal part 2,10 Seal part 3,4,11,12 electrode substrate 5,13 Top plate of laminating machine 6,14 Lower surface plate of laminating machine 7 Upper surface plate hole 8 UV irradiation device

Claims (5)

[Claims] 1. A method of manufacturing a liquid crystal display device, comprising the step of adhering two electrode substrates using an ultraviolet curable resin, wherein the ultraviolet curable resin seal forms a region necessary for a product on the electrode substrate. And a dummy seal part of the ultraviolet curable resin is provided in a region other than a region necessary for a product,
After bonding the two electrode substrates, at least two or more locations of the dummy seal portion are irradiated with ultraviolet rays to form a gap between the two electrode substrates in a state where the dummy seal portion is partially cured. A method for manufacturing a characteristic liquid crystal display device. 2. The method for producing a liquid crystal display element according to claim 1, wherein an acrylic resin is used as the ultraviolet curable resin. 3. The method for producing a liquid crystal display device according to claim 1, wherein a urethane resin is used as the ultraviolet curable resin. 4. The method for producing a liquid crystal display element according to claim 1, wherein a silicone resin is used as the ultraviolet curable resin. 5. A pair of fixed substrates for bonding two electrode substrates, each of which has a seal portion of an ultraviolet curable resin forming a necessary area for a product and has a dummy seal portion of an ultraviolet curable resin other than the necessary area for a product. An apparatus for manufacturing a liquid crystal display device, comprising a board, and holes for irradiating ultraviolet rays are provided at positions of the surface plate corresponding to at least two positions of the dummy seal portion.