KR100778839B1 - Plate Forming an Alignment Film of Liquid Crystal Display and Method of Aligning Liquid Crystal Layer Using The Same - Google Patents

Abstract

The present invention relates to a plate for forming an alignment film that enables the formation of an alignment film that does not require a rubbing operation.

      The plate for forming an alignment film of the present invention is periodically arranged in a groove form on the surface of the acid / valley.

       Accordingly, when the alignment film is formed using the alignment film forming plate of the present invention, there is an advantage that the liquid crystal can be aligned without undergoing a rubbing operation.

Description

Plate for forming an alignment layer of a liquid crystal display device and a liquid crystal alignment method using the same {Plate Forming an Alignment Film of Liquid Crystal Display and Method of Aligning Liquid Crystal Layer Using The Same}             

1 is a perspective view showing a conventional plate for forming an alignment film.

FIG. 2 is a cross-sectional view showing a plate for forming an alignment film shown in FIG. 1. FIG.

3 is a perspective view showing a plate for forming an alignment film of the present invention.

<Description of Symbols for Main Parts of Drawings>

2: hemispherical protrusion 4: lattice rib

6: Flat part 8, 14: Plate for forming an oriented film

10: gynecology 12: bone

The present invention relates to an alignment film-forming plate capable of forming an alignment film on a substrate of a liquid crystal display device. The present invention also relates to a method of orienting the liquid crystal.

The liquid crystal display of the active matrix driving method displays a moving image using a thin film transistor (hereinafter, referred to as TFT) as a switching element. Such liquid crystal display devices can be miniaturized compared to CRTs, and are widely used in personal computers and notebook computers, as well as office automation devices such as photocopiers, mobile devices such as cell phones and pagers. .

The manufacturing process of the active matrix liquid crystal display device is divided into substrate cleaning, substrate patterning, alignment film formation, substrate bonding / liquid crystal injection, mounting process, and the like. In the substrate cleaning process, foreign substances on the substrates before and after the upper and lower substrates are patterned are removed using a cleaning agent. The substrate patterning process is divided into patterning of the upper substrate and patterning of the lower substrate. In the patterning process of the upper substrate, a color filter, a common electrode, a black matrix, and the like are formed. Signal lines such as data lines and gate lines are formed on the lower substrate, and TFTs including gate, source and drain electrodes are formed at the intersections of the data lines and the gate lines, and source electrodes are formed in the pixel region between the data lines and the gate lines. And a pixel electrode connected to are formed. In the substrate bonding / liquid crystal injection process, an alignment film is coated on the lower substrate and rubbed, followed by an upper / lower substrate bonding process using a seal material, liquid crystal injection, and an injection hole encapsulation process. Finally, in the mounting process, a tape carrier package (TCP) on which a gate drive integrated circuit, a data drive integrated circuit, or the like is mounted is connected to a pad portion on a substrate.

As described above, in the manufacturing process of the liquid crystal display, the forming of the alignment film on the substrate uses an alignment film forming plate as shown in FIG. 1.

Referring to FIG. 1, the conventional alignment film forming plate 8 includes a flat portion 6, a plurality of hemispherical protrusions 2 located on the flat portion 6, and a lattice rib 4. The hemispherical protrusions 2 are formed at regular intervals on the planar portion 6 and the lattice ribs 4 are formed in a lattice shape at the periphery of each hemispherical protrusion 2. The hemispherical protrusion 2 allows the alignment agent contained in the lattice rib 4 to be uniformly printed on the substrate. It also prevents the alignment agent from spreading and flowing into the other lattice ribs 4. As shown in Fig. 2, the lattice ribs 4 are formed at a height of about 18 mu m to 20 mu m from the planar portion 6 of the plate for forming the alignment film to distinguish the hemispherical protrusions 2 from each other.

The plate 8 for forming an alignment film having such a structure is attached onto a printing roller to form an alignment film on a substrate, and the roller for feeding the alignment agent is engaged at a 45 ° angle on the roller to supply the alignment agent. The roller for aligning film printing holds the supplied aligning agent in the lattice rib 4 of the oriented film forming plate 8 attached to the surface and rotates in one direction on the substrate moving in one direction to uniformly form the oriented film.

However, when the alignment layer is formed on the substrate using the alignment film forming plate including the conventional hemispherical protrusions, the alignment film printed on the substrate has to be rubbed at an angle of 75 ° to align the liquid crystal.

Accordingly, it is an object of the present invention to provide an alignment film forming plate and a liquid crystal alignment method using the same, which enable the formation of an alignment film that does not require a rubbing operation.

In order to achieve the above object, the plate for forming the alignment film of the present invention is periodically arranged in the groove form acid / valley on the surface.

In addition, the liquid crystal alignment method using the alignment film forming plate according to the present invention comprises the steps of providing a plate for forming the alignment film having a regular alignment of the acid and the valley having the alignment angle of the liquid crystal, and attaching the plate for forming the alignment film to the surface of the printing roller And supplying the alignment film solution to the alignment film forming plate attached to the printing roller, and printing the alignment film having grooves formed on the substrate by using the alignment film printing roller.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIG. 3.

3 is a perspective view showing a plate for forming an alignment film of the present invention.

Referring to FIG. 3, the peaks / valleys 10 and 12 are periodically arranged in a groove shape on the upper surface of the alignment film forming plate 14 of the present invention. At this time, one side of the peaks / valleys 10 and 12 is formed at an angle coinciding with the alignment angle of the liquid crystal and raised 20 μm or more.

The plate for forming an alignment film 14 comprising the peak portion 10 and the valleys 12 is attached on a printing roller to form an alignment film on a substrate, and the roller for feeding the alignment agent is engaged on the roller to supply the alignment agent. The alignment film printing roller prints the supplied alignment agent in the valley portion 12 of the alignment film forming plate 14 attached to the surface while rotating in one direction on a substrate moving in one direction. As a result, the alignment film is formed at an angle coinciding with the alignment angle of the liquid crystal.

As described above, when the alignment film is formed on the substrate using the plate for forming the alignment film of the present invention, the alignment film is formed at an angle coinciding with the alignment angle of the liquid crystal. Therefore, there is an advantage that can align the liquid crystal without going through the rubbing operation. In addition, the above-described rubbing method is applicable not only to elements, such as TFT, TN, STN, MIM, but to any element which orientates.

As described above, when the alignment film is formed on the substrate using the plate for forming the alignment film of the present invention, the alignment film is formed at an angle coinciding with the alignment angle of the liquid crystal. Therefore, there is an advantage that can align the liquid crystal without going through the rubbing operation.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (4)

delete delete In the liquid crystal alignment method of the liquid crystal display device, An elastic plate member in which the peaks and valleys are periodically arranged in a groove shape on one surface, and one side of the peaks or valleys is formed at an angle coinciding with the alignment angle of the liquid crystal, and the peaks or valleys are raised by 20 µm or more. To prepare a step, Attaching the elastic plate member to the surface of the alignment film printing roller, Supplying an alignment film solution to the elastic plate member attached to the alignment film printing roller; And Containing the solution for the alignment film in the valley of the elastic plate member and printing the alignment film on the substrate using the alignment film printing roller, And a groove for aligning the liquid crystal on the alignment film by the elastic plate member, while the alignment film is printed on the substrate. delete

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