KR19990028071A - Manufacturing method of liquid crystal display device - Google Patents

Abstract

The present invention relates to a method of manufacturing a liquid crystal display (LCD), wherein a conductive terminal is positioned at a common terminal formed on the upper liquid crystal substrate when the upper liquid crystal substrate and the lower liquid crystal substrate are bonded to each other. By using a sealant including a spacer having a plurality of common terminals and by injecting a plurality of common terminals in a bar or quadrangle to maintain a constant cell gap, thereby improving the work efficiency and conductivity accordingly to improve the characteristics of the LCD device.

Description

Liquid Crystal Display Manufacturing Method

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for manufacturing an LCD. In particular, in the case of bonding the upper and lower liquid crystal substrates, a sealant including a conductive spacer is provided on a contact pad of the lower liquid crystal substrate, which is in contact with a portion where a common terminal of the upper liquid crystal substrate is formed. The present invention relates to a technique for forming a plurality of common terminals into a bar type or a square type.

LCD, a type of flat panel display, is an apparatus that changes the optical anisotropy by applying an electric field to a liquid crystal that combines liquidity and optical properties of crystals, and consumes more power than conventional cathode ray tubes. Its low size, small size, large size and high definition make it widely used.

Looking at the steps of a conventional LCD manufacturing process as follows.

First, indium on a transparent substrate made of quartz. Thin. A pixel electrode made of indium thin oxide and a transparent electrode pattern are formed, and a protective film for preventing short circuit of the transparent electrode pattern and an alignment film for arranging liquid crystals are sequentially formed.

Then, the lower liquid crystal substrate is completed by using a rubbing roll wound around a cylindrical core to give the orientation film to the alignment layer. Then, an upper liquid crystal substrate having a common electrode is formed, and the upper liquid crystal substrate and the lower liquid crystal are formed. A spacer and a failure turn are formed to have a constant cell gap, an upper substrate is formed and sealed, a liquid crystal is injected into the cell gap, and a seal is completed to complete the LCD.

In this case, when forming the seal pattern, a silver epoxy resin is applied to each common terminal or a sealant is mixed with a conductive material such as nickel (Ni) to form a seal pattern.

As described above, in the liquid crystal display device manufacturing method according to the related art, when the silver epoxy resin is applied to each common terminal, since the silver epoxy resin has different characteristics from the main sealant, the cell gap is changed, and thus the display is performed. When the area is different in color, and the conductive material is used for the entire sealant, the material is wasted by using the conductive material to the unnecessary portion. In addition, the conductive material such as nickel has a problem that the upper liquid crystal substrate and the lower liquid crystal substrate are shorted to each other during the printing process because the shrinkage is different from the sealant.

Accordingly, the present invention is to solve the above problems of the prior art, and includes a conductive spacer similar to the sealant on the lower liquid crystal substrate to be bonded to the common terminal portion of the upper liquid crystal substrate before bonding the upper and lower liquid crystal substrates. The present invention provides a method for manufacturing a liquid crystal display device in which a cell gap can be kept constant by improving the conductivity by tying a plurality of common terminals to form a bar shape or a quadrangle using a sealant.

1A to 1D are plan views of a liquid crystal display seal pattern according to the present invention;

* Explanation of symbols for main parts of the drawings

11: upper liquid crystal substrate, 16: seal pattern, 13, 17: transparent electrode, 14: common terminal, 15: lower liquid crystal substrate, 18: individual terminal, 19: connection pad

In order to achieve the above object, the liquid crystal display device manufacturing method according to the present invention is characterized in that, in the sealing process for joining the upper and lower liquid crystal substrate, the common terminal with a sealant including a conductive spacer in a seal pattern of a portion predetermined as a common terminal. It includes a step of forming a bar or quadrangular.

Hereinafter, a method of manufacturing a liquid crystal display device according to the present invention will be described in detail with reference to the accompanying drawings.

1A to 1D are plan views of a liquid crystal display seal pattern according to an exemplary embodiment of the present invention.

First, the upper liquid crystal substrate 11 is formed by forming transparent electrode patterns 13 and 17, an alignment layer (not shown), a color filter (not shown), and the like on a substrate formed of a transparent material, for example, quartz, glass, or plastic. And the lower liquid crystal substrate 15 is formed.

Here, a common terminal 14 is formed on the upper liquid crystal substrate 11, and a connection pad 19 to which the individual terminal 18 and the common terminal 14 are connected is formed on the lower liquid crystal substrate 15. have.

Next, a seal pattern 16 is formed on the lower liquid crystal substrate 15 to bond the upper liquid crystal substrate 11 and the lower liquid crystal substrate 15 to each other. In this case, the portion where the common terminal 15 is connected to the external terminal (not shown) is formed by a sealant including a spacer (not shown) having conductivity. As the spacer having conductivity, a spacer coated with gold to a spherical resin may be used, and a cell gap may be maintained as a whole by the spacer.

On the other hand, a method of injecting a sealant including a conductive spacer into the common electrode may be formed by tying a plurality of common terminals in a bar shape as shown in part ⓐ of FIG. 1C, or as a rectangle as shown in part ⓑ of FIG. 1D.

As described above, in the method of manufacturing the liquid crystal display device according to the present invention, in the process of joining the upper liquid crystal substrate and the lower liquid crystal substrate, a plurality of common parts are formed by using a sealant including a conductive spacer in a portion that is intended as a common terminal. By forming the terminal in a bar or quadrangle, there is an advantage of maintaining the cell gap constant and improving work efficiency and conductivity than when injecting a conductive resin into each common terminal.

Claims (2)

In the sealing process for joining the upper and lower liquid crystal substrates, a common terminal is formed in a bar shape or a quadrangle with a sealant including a conductive spacer in a seal pattern of a portion designated as a common terminal, so that the transparent electrode pattern of the upper liquid crystal substrate is formed on the lower liquid crystal substrate. A method of manufacturing a liquid crystal display device, comprising contacting an external lead-out terminal. The method of claim 1, The spacer is a liquid crystal display device manufacturing method characterized in that using a gold (Au) coated on a spherical resin.