JPS62129821A - Manufacture of liquid crystal display - Google Patents

Abstract

PURPOSE:To shorten the time of a seal curing process and to facilitate an operation by interposing a gap agent, liquid crystal, and adhesive particles of specific particle size with specific softening temperature between two glass substrates which have transparent electrodes, arranging a ultraviolet-ray curing type seal material at the peripheral edge part, and curing the seal material after a press and a heat treatment. CONSTITUTION:The gap control material 23, liquid crystal 24, and adhesive particles 25 are interposed between two glass substrates 21 and 22 where transparent electrodes are formed and oriented, and the ultraviolet-ray curing type seal agent 27 which contains a gap control material 26 is arranged at the peripheral edge part to form a cell shape. The adhesive 25 cures to adhere at temperature higher than the dislocation temperature between the liquid crystal and liquid and have larger size than the gap control material 23. This cell assembly is placed on cushion material 32 on a pedestal 31, a cushion material 34 on the reverse surface of a pressure plate 33 is placed thereupon, and a shaft 35 is pushed down by a press device to adjust the gap. At the same time, the adhesive particles are heated to and adhere. Then, ultraviolet rays are irradiated to cure the seal agent 27, thus obtaining a liquid crystal display cell.

Description

Detailed Description of the Invention [Technical Field 1] The present invention relates to a liquid crystal display device in which a gap control material and a liquid crystal are interposed between two glass substrates on which transparent 711f electrodes are formed, and a sealing agent is provided on the periphery of the gap control material and the liquid crystal. The present invention relates to a method for manufacturing.

[Prior Art] When manufacturing a liquid crystal display device, for example, as shown in FIG. interposed, and a thermosetting sealant 5 mixed with a gap control material 6 is placed on the peripheral edge of the cell, sandwiched between metal plates 9.10 from above and below through a cushioning material 7.8, and bolted. 11 and nuts 12, and set it in a press device (not shown), apply an external force to crush the sealant 5 to a predetermined thickness, and tighten the bolts 11 and nuts 1-12. The sealant 5 is cured by heat treatment while maintaining the pressurized state (pressure by the press device is released).

However, in such a method, the substrate 1,
2 is inserted between metal plates 9 and 10 with large heat capacity, and the substrate 1.2 is heated together with this metal plate, so it takes time for the substrates 1 and 2 to reach the predetermined seal curing temperature. Moreover, the temperature is difficult to drop even during cooling after the seal has hardened, and the seal hardening process takes a long time. Further, it takes time and effort to insert the seal between the metal plates 9 and 10 and to take it out after the seal has hardened.

[Object of the Invention] An object of the present invention is to provide a method for manufacturing a liquid crystal display device that can shorten the time of the seal curing process and simplify the work.

[Summary of the Invention] The present invention provides for a gap control material and a liquid crystal to be softened and bonded together at a temperature higher than the transition temperature between the liquid crystal and the liquid between two glass substrates having transparent electrodes on their inner surfaces, and for the gap 1
Adhesive particles having a diameter larger than that of the lll tel material are interposed, and an ultraviolet curing sealant is placed around the periphery to form a cell shape, and this cell-like aggregate is press-processed to control the gap. , the adhesive particles are softened by heat treatment, and the two substrates are connected by the adhesive force, then cooled and external pressure is removed, and then the cellular aggregate is irradiated with ultraviolet rays to harden the sealant. It is characterized by:

[Example] Figure 1 does not show an example of the present invention; therefore, two glass substrates 2 with transparent electrodes formed on their inner surfaces and subjected to alignment treatment are shown.
Gap control material 23, liquid crystal 24 and adhesive particles 25 are interposed between 1.22, and gap control material 2 is placed on the periphery thereof.
An ultraviolet curing sealant 27 containing 6 is disposed to form a cell shape. The adhesive particles 25 soften and adhere at a temperature higher than the transition temperature between the liquid crystal and the liquid, and
A material with a diameter larger than that of 611 material is used.

Then, the cellular aggregate is placed on the cushion material 3 on the upper surface of the pedestal 31.
2 and sandwiched between it and the cushion material 34 on the lower surface of the presser plate 33. The presser plate 33 is attached to the shaft 3 of the press device.
5, and press down to adjust the gap. In this case, the adhesive particles 25 are heated to a temperature at which they are softened and bonded while applying external pressure. The adhesive particles 25 are softened by heating for a few minutes, and the adhesive force between the two substrates 21 and 22 is softened.
are connected with a predetermined gap maintained. After this, it is cooled and the external pressure is removed.

Next, the cell-shaped aggregate is transferred to a seal curing step and irradiated with ultraviolet rays, whereby the sealant 27 is cured and a liquid crystal display cell is completed.

[Effects] As described above, according to the present invention, adhesive particles are sprayed at the same time as the give-V joint control material, heated and softened immediately after the press process for gap adjustment, and the adhesive force is used to bond both substrates together. Since they are connected, the cell assembly can be efficiently irradiated with ultraviolet rays during the seal curing process, and the time required for the seal curing process can be shortened. In addition, time-consuming operations such as sandwiching the substrate between metal plates, tightening and releasing bolts and bolts, etc. are no longer necessary, and the process can be simplified. Furthermore, since the gap is controlled using the gap control material and adhesive particles, it is possible to obtain a liquid crystal display device in which the gap is uniformly controlled over the entire surface of the substrate.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a gap control process showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a gap control process showing a conventional example. 21 and 22...Substrates 23 and 26...Gap control material 24...Liquid crystal 25...Adhesive particles 2
7...Ultraviolet curing sealant 31...Case

Claims (1)

[Claims] Adhesive particles that soften and adhere together with a gap control material and a liquid crystal at a temperature higher than the transition temperature between the liquid crystal and the liquid and have a diameter larger than the gap control material between two glass substrates having transparent electrodes on the inner surface. interposed, and an ultraviolet curing sealant is placed on the periphery to form a cell, and this cellular aggregate is press-treated to control the gap, and at the same time heat-treated to soften the adhesive particles. A method for manufacturing a liquid crystal display device, which comprises connecting both substrates by the adhesive force, cooling and removing external pressure, and then irradiating the cellular aggregate with ultraviolet rays to harden the sealant.