JPH0416923A - Formation of oriented film of liquid crystal display element - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method for manufacturing a liquid crystal display element,
In detail, the invention relates to a method of forming an alignment film on a glass substrate.

[Conventional technology]

Figure 1 shows a conventional method for forming an alignment film on a glass substrate in the order of steps. First, a material suitable for forming an alignment film, such as polyimide resin, is applied onto a cleaned glass substrate by flexographic printing or a spin cord. The film is formed as a film surface by a method, and then fixed by a baking process, and then an orientation treatment is performed by rubbing the film surface in a predetermined direction with a rubbing roller, etc., to obtain the desired oriented film. be. Note that a plastic material may be used as the glass substrate.

[Problem to be solved by the invention]

However, the above-mentioned conventional formation method requires a large number of steps and is labor-intensive, and also requires advanced technology such as printing, so the above-mentioned alignment film formation process is a factor that increases the cost of the liquid crystal display element. Furthermore, since the formation of the film surface and the orientation treatment are separate steps, there is also the problem of reduced precision, and it has been a challenge to solve these problems.

[Means to solve the problem]

The present invention provides a method for forming an alignment film that has been subjected to alignment treatment on a glass substrate of a liquid crystal display element, as a specific means for solving the conventional problems described above. Forming an alignment film for a liquid crystal display element, characterized in that a rubbing roller is rotated while in contact with the glass substrate at the same time, and the rotation of the rubbing roller causes the alignment film material to be transferred to the glass substrate in an aligned state. By providing a method, it is possible to simplify the manufacturing process and solve the above-described conventional problems.

【Example】

Next, the present invention will be explained in detail based on an embodiment shown in the drawings. What is indicated by the symbol l in Fig. 1 is a rubbing roller,
The rubbing roller 1 has a stage 2 and a rotatable cylindrical body 3 around which a rubbing cloth 4 is wrapped, and is configured to be able to rub a glass substrate 5 set on the stage 2. In addition to this, according to the present invention, the body 3 wrapped with the rubbing cloth 4 is made of polyimide resin, for example, at the same time as it comes into contact with the glass substrate 5. It also comes into contact with and rubs against the alignment film material 6 formed in a plate shape, and when forming an alignment film on the glass substrate 5, the body 3 is rotated in this state, and the rubbing cloth 4 is used to rub the alignment film. The material 6 is rubbed and the glass substrate 5 is rubbed at the same time. At this time, it is convenient if the alignment film material 6 is constructed to move horizontally together with the rubbing roller 1, since it can be applied to any size of glass substrate 5. Next, the effects of the present invention using the above-mentioned forming method will be described. The rubbing roller 1 wrapped with the rubbing cloth 4 is brought into contact with the glass substrate 5 and the alignment film material 6 at the same time, and both are rubbed. By rotating the glass substrate 5 in such a manner, a part of the alignment film material 6 is transferred from the alignment film material 6 to the glass substrate 5 via the rubbing cloth 4 and adheres thereto in a state having alignment characteristics, thereby forming an alignment film 7. become something that That is, according to the present invention, the formation of the alignment film 7 and the alignment process for the alignment film 7 can be performed simultaneously by performing substantially the same process as the alignment process in the conventional example. FIG. 2 shows the main parts of another embodiment of the present invention,
When the glass substrate 5 is set on the stage 2, the portion where the alignment film 7 is unnecessary is covered with a mask 8 formed of a thin plate of stainless steel, for example.
By performing the same steps as in the previous embodiment after this, the alignment film 7 can be formed only on the necessary portions of the glass substrate 5, so that the alignment film 7 can be formed only on the necessary portions of the glass substrate 5, without relying on sophisticated means such as printing. It becomes possible to easily obtain the shaped alignment film 7. The functions and effects other than those described above are completely the same as those in the previous embodiment, so detailed explanations will be omitted here.

【Effect of the invention】

As explained above, according to the present invention, a rubbing roller is rotated while coming into contact with a glass substrate and an alignment film material at the same time, and the rotation of the rubbing roller aligns the alignment film material on the glass substrate. By adopting a method for forming an alignment film for a liquid crystal display element that involves dislocation in the state, the formation of an alignment film and the alignment process can be performed in a printing process, etc., with only the rubbing with a rubbing roller, which was previously performed in the alignment process. This makes it possible to carry out the processes simultaneously without using sophisticated processes, thereby making it possible to simplify the manufacturing process of liquid crystal display elements, and having an outstanding effect on cost reduction.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the method for forming an alignment film for a liquid crystal display element according to the present invention, FIG. 2 is a perspective view showing another embodiment of the present invention at the waist, and FIG. 3 is a flowchart showing steps of an alignment film forming method. 1-・-1--Rubbing roller 2------1--Stage 3--Body part 4--Rubbing cloth・--1-Glass substrate e ---------One alignment film material 7---One alignment film 8・---One----Mask

Claims (2)

[Claims] (1) In a forming method for forming an alignment film that has been subjected to alignment treatment on a glass substrate of a liquid crystal display element, a rubbing roller is rotated while being brought into contact with the glass substrate and the alignment film material at the same time, and the rubbing roller A method for forming an alignment film for a liquid crystal display element, characterized in that the alignment film material is transposed onto the glass substrate in an alignment-treated state by rotation. (2) A method for forming an alignment film for a liquid crystal display element according to claim (1), wherein unnecessary portions of the alignment film on the glass substrate are masked.