JP2605081Y2 - Liquid crystal cell manufacturing equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal cell manufacturing apparatus, and more particularly to a liquid crystal cell manufacturing apparatus for pressure-curing a liquid crystal cell using an adhesive which is cured by irradiating ultraviolet rays as a sealant.

[0002]

2. Description of the Related Art Conventionally, a liquid crystal cell is manufactured by using a pressure curing device by using an adhesive (hereinafter, referred to as a UV sealant) which is cured by irradiating ultraviolet rays as a sealant for the liquid crystal cell. Means have been proposed. The means will be described below with reference to FIG. FIG. 5 is a cross-sectional view showing a conventional pressure curing device.

As shown in FIG. 5, a transparent electrode (not shown)
A UV sealant 19 is provided in a predetermined shape on a first substrate 17 having a transparent substrate (not shown).
A spacer 20 is provided on the substrate 18 to keep the distance between the substrates uniform. As the spacer 20, beads such as plastic and glass are used.

Next, the first substrate 17 and the second substrate 18 are overlapped at a predetermined position.
If the 7 and the second substrate 18 are merely overlapped, the substrate may be warped or undulated, and the subsequent steps cannot be performed.

[0005] Then, the UV sealant 19 is cured by using a pressure curing device with the first substrate 17 and the second substrate 18 being uniformly spaced.

The pressure curing device used here transmits ultraviolet rays generated by an ultraviolet irradiation device (not shown), and its surface is polished to improve the flatness of the base material 11 made of a member. The first substrate 17 and the second substrate 18 which are superimposed at a predetermined position are installed thereon, and an air bag 13 made of a rubber bag for performing pressurization by air pressure is further provided thereon, Upper base member 12 for holding air bag 13 and stopper 14 of upper base member 12
Overlaid.

After the first substrate 17, the second substrate 18, and the air bag 13 are installed between the base material 11 and the upper base material 12, an appropriate air pressure is applied to the air bag 13 to Pressure is applied to the first substrate 17 and the second substrate 18 so that the first substrate 17 and the second substrate 18 have a uniform spacing provided by the spacers 20 without warping or undulation of the substrates, and at the same time, ultraviolet irradiation UV from equipment (not shown)
By irradiating ultraviolet rays having a wavelength at which the sealant 19 cures,
This is for curing the sealant 19.

[0008]

[Problems to be Solved by the Invention] As described above, U
In the production of a liquid crystal cell using the V sealant 19, a pressure curing device is used. However, in a conventional pressure curing device, a glass chip, dust, or the like is placed between the first substrate 17 and the base material 11. Projecting contaminants are mixed.

When the contaminants are present, the first and second substrates 17 and 18 are deformed by the projecting contaminants, and the first substrate 17 and the second substrate 17 around the protruding contaminants are deformed. Substrate 1
The UV sealant 19 is cured in a state where the distance between the liquid crystal 8 and the liquid crystal 8 is not uniform, and the display screen of the completed liquid crystal cell becomes uneven, and the display quality is deteriorated.

[0010] Further, due to warpage or undulation of the substrate due to the contaminants in the form of projections, defects such as poor vacuum suction or not entering the case of the substrate occur, and the subsequent process can be performed. Disappears.

Further, after the curing of the UV sealant 19,
There is also a drawback that the first substrate 17 and the base material 11 are adsorbed and it is difficult to remove the substrate from the pressure curing device.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, to prevent a substrate from being warped or undulated when a projection-like contaminant such as a glass chip or dust is mixed, and to provide a uniform substrate over the entire surface of the substrate. It is an object of the present invention to provide a liquid crystal cell manufacturing apparatus capable of hardening a UV sealant in a state of an interval and facilitating removal of a substrate after the UV sealant is hardened and improving productivity.

[0013]

In order to achieve the above object, a liquid crystal cell manufacturing apparatus according to the present invention employs the following structure.

In the liquid crystal cell manufacturing apparatus of the present invention, a first substrate and a second substrate provided with a UV sealant between a base material and an upper base material are arranged, and the first substrate is formed using an air bag. A liquid crystal cell manufacturing apparatus for applying pressure to the second substrate and simultaneously irradiating ultraviolet rays to cure the UV sealant, wherein a buffer sheet is provided between the base material and the first substrate. And

In the liquid crystal cell manufacturing apparatus of the present invention, a first substrate and a second substrate provided with a UV sealant between a base material and an upper base material are arranged, and the first substrate is provided using an air bag. In a liquid crystal cell manufacturing apparatus for applying pressure to the and the second substrate, simultaneously irradiating ultraviolet rays to cure the UV sealant, providing a buffer sheet between the base material and the first substrate,
Further, an anti-adhesion sheet is provided between the second substrate and the airbag.

[0016]

[Function] By installing a flexible buffer sheet that transmits ultraviolet light between the base material and the substrate, even if a projection-like contaminant is mixed, the buffer sheet functions as a buffer material. It is possible to suppress the occurrence of warpage and undulation of the substrate, and further to prevent the first substrate from adsorbing to the base material. As a result, the UV sealant can be cured with the distance between the first substrate and the second substrate being uniform, and the display quality of the liquid crystal cell is improved. Further, the first substrate and the base material can be prevented from being attracted to each other.

Further, if necessary, a flexible anti-adhesion sheet may be provided between the second substrate and the airbag to prevent the second substrate and the airbag from adsorbing.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a pressure curing device according to the present invention.

As shown in FIG. 1, the base material 11 is made of glass such as Pyrex or quartz which transmits ultraviolet rays generated by an ultraviolet irradiation device (not shown) and has a good flatness by polishing the surface. It consists of.

Here, usually, an ultraviolet ray having a peak at 365 nm is used in the ultraviolet irradiation device.

On the base member 11, a buffer sheet 15 made of cellulose triacetate, polycarbonate, or the like, which transmits ultraviolet light generated by an ultraviolet irradiation device and has flexibility, is disposed. Further, on the buffer sheet 15, the first substrate 17 and the second substrate 18, which are superposed at a predetermined position using the UV sealant 19, are placed with the spacer 20 interposed therebetween.

Further, on the second substrate 18, there is provided an air bag 13 made of a rubber bag for applying air pressure.

Further, an upper base member 12 made of a stainless material for holding down the air bag 13 and a stopper 1 of the upper base member 12 made of a stainless material.
Overlay 4.

Next, a method of manufacturing a liquid crystal cell using the pressure curing device of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a transparent electrode (not shown)
An alignment film (not shown) made of a polyimide film is formed on a first substrate 17 having a transparent electrode (not shown) and a second substrate 18 having a transparent electrode by a method such as a printing method or a spin coating method. It is formed in a predetermined shape and rubbed.

On the first substrate 17 on which the alignment film is formed,
The UV sealant 19 is provided in a predetermined shape. Furthermore, the first
Spacers 20 for keeping the distance between the substrate 17 and the second substrate 18 uniform are uniformly spread over the surface of the second substrate 18.

As the spacer 20, beads of a predetermined size made of plastic or glass are used.

Next, the first substrate 17 and the second substrate 18 are overlapped at a predetermined position, and
Installed in the pressure curing device of the present invention.

After placing the first substrate 17 and the second substrate 18 in the pressure curing device, an appropriate air pressure is applied to the air bag 13 to apply pressure to the first substrate 17 and the second substrate 18. Do. Here, the air pressure applied to the air bag 13 is usually 0.1 kg / cm ^{2 to} 2.0 kg / cm ² .

Even when a projection-like contaminant is mixed between the base material 11 and the first substrate 17 at the time of pressurization by the airbag 13, the buffer sheet 15 functions as a cushioning material, thereby reducing the distance between the substrates. It is possible to prevent unevenness and warpage and undulation of the substrate.

The first substrate 17 and the second substrate 18 are arranged at a uniform distance provided by the spacer 20 without warping or undulation of the substrate, and an ultraviolet ray generator (not shown)
UV light is applied for a certain period of time to cure the UV sealant 19 and complete the process.

The buffer sheet 15 has a function of preventing the base material 11 from adsorbing to the first substrate 17 in addition to the function of preventing unevenness of the substrate spacing and the occurrence of warpage and undulation.
It is easy to take out the substrate from the pressure curing device.

As shown in FIG. 2, if necessary, the space between the airbag 13 and the second substrate 18 is made of the same material as the buffer sheet 15, or a flexible Kent paper or plastic material. The seat 16 is set.

By providing the suction prevention sheet 16 between the airbag 13 and the second substrate 18, the suction between the airbag 13 and the second substrate 18 can be prevented. The substrate can be easily taken out.

After curing the UV sealant 19, the first
Liquid crystal (not shown) between the first substrate 17 and the second substrate 18
Inject.

The buffer sheet 15 and the anti-sucking sheet 16 used in the present invention are likely to be deformed after use, and are therefore preferably disposable and inexpensive.

Further, the buffer sheet 15 and the anti-adsorption sheet 16 can have a sufficient effect even if they have a flat cross section, but the surface is subjected to a chevron treatment by a hot press treatment as shown in FIG. The use of a substrate subjected to honing processing or a substrate whose surface is roughened by a honing process, such as the cross-sectional shape shown in FIG. 4, can further improve the uniformity of the spacing between the substrates and the ease of taking out the substrates.

[0038]

As is clear from the above description, the pressure hardening apparatus of the present invention can be used even if projection-like contaminants such as glass chips and dust are mixed between the first substrate and the base material. Since the buffer sheet has a buffering action, liquid crystal cells at uniform intervals without warpage or undulation of the substrate can be formed.

Still further, a buffer sheet is provided between the first substrate and the base material according to the second aspect, and an anti-adhesion sheet is provided between the airbag and the second substrate. Adsorption between the substrate and the base material and between the airbag and the second substrate can be prevented, and the substrate can be easily taken out from the pressure curing device. As a result, the productivity of the liquid crystal cell can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a pressure curing device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a pressure curing device according to another embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a buffer sheet and an adsorption prevention sheet used in the pressure curing device of the present invention.

FIG. 4 is a cross-sectional view showing a buffer sheet and an adsorption prevention sheet used in the pressure curing device of the present invention.

FIG. 5 is a sectional view showing a pressure curing device in a conventional example.

[Explanation of symbols]

 Reference Signs List 11 base material 13 air bag 15 buffer sheet 16 adsorption prevention sheet 17 first substrate 18 second substrate 19 UV sealant

Claims (1)

(57) [Scope of request for utility model registration] 1. A first substrate and a second substrate provided with a UV-curable sealant between a base material and an upper base material, and the first substrate and the second substrate are arranged using an airbag. applying pressure to the bets, in the liquid crystal cell manufacturing apparatus for curing the sealing agent of the ultraviolet cured by simultaneously irradiating with ultraviolet light, provided the buffer sheet between the base material and the first substrate, further second
The liquid crystal cell manufacturing apparatus according to claim Rukoto provided an adsorption prevention sheet between the substrate and the air bag.