JPS608485B2 - liquid crystal display cell - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid crystal display cell using a plastic film having a transparent conductive film as a substrate.

An object of the present invention is to provide a liquid crystal display cell in which the amount of gap between the upper and lower substrates is kept constant and the seal portion is free from defects. Furthermore, the electrical characteristics of the liquid crystal display cell are improved to realize a high quality liquid crystal display cell. The structure of a conventional liquid crystal display cell will be explained with reference to FIGS. 1 and 2. FIG. 1 is a plan view, and FIG. 2 is a cross-sectional view. a gap agent 2 to ensure proper clearance, and
There is a sealant 4 for adhering the plastic film substrates together and for sealing the liquid crystal 3, and the liquid crystal 3.

Since the plastic film substrate 1 is soft and highly flexible, when the film is cut by shearing with scissors or a cutter, burrs 5 are generated on both the front and back surfaces of the plastic film substrate 1. Such a plastic film substrate 1 is used as a lower substrate I of a liquid crystal display cell.
If you use it as A and try to attach it to the upper substrate IB, there will be swelling of 10 to 50 mm or the burr 5 will become a hindrance, making it impossible to secure an appropriate gap of 10 mm between both substrates. For this reason, the printed sealant 4 does not spread within a predetermined area, creating a gap 4 in the sealing portion, making it impossible to seal the liquid crystal 3. Furthermore, the electro-optical quality of products manufactured using plastic film substrates with burrs is very poor compared to the quality of liquid crystal display cells manufactured using plastic film substrates without burrs. There was a drawback.
The present invention eliminates the above-mentioned drawbacks, and provides a liquid crystal display cell using a plastic film substrate in which the gap between the upper and lower substrates is maintained at approximately 10 mm, and the seal portion is free from defects.

The present invention will be explained below based on the drawings. FIG. 5 is a plan view showing one embodiment of the present invention, FIG. 6 is a sectional view thereof, and FIG.
The figure is a sectional view of the main part, and FIG. 3 is a diagram showing the panel cutting method.

The plastic film substrate 1 having a transparent conductive film is made such that the burrs generated when cutting its external shape are generated only in one direction by using a press process, etc., and when assembled as a liquid crystal display cell. Process it so that it becomes the outer surface of the liquid crystal display cell. That is,
As shown in Fig. 3, the upper die 6 and the lower die 7 are formed by press working.
Using the attached cutting blades 8 and 9, set the plastic film lower substrate IA between the upper die 6 and the lower die 7 so that the transparent conductive film is on top, and then lower the upper die 6 to cut it into a predetermined shape. Shear to. In this way, the lower substrate after being sheared is as shown in FIG.
No burrs occur on the A' side, but burrs occur only on the lower surface side. The lower substrate processed in this way has no burrs on the surface having the transparent conductive film IA, so as shown in FIGS. After sealing the outer periphery with agent 4, sealing agent 3 mixed with gap agent 2 is injected. In this way, since there is no extra unevenness between the upper and lower substrates, the gap between the upper and lower substrates can be set accurately only by the size of the gap agent 2. Therefore, the sealant applied in advance can be set so that it spreads ideally and has an appropriate width. As a result, the electro-optical characteristics such as response speed, contrast, and current consumption were improved compared to conventional ones. In the embodiment, only the lower substrate was sheared using a press die, but the upper substrate or both substrates may be similarly processed depending on manufacturing or design conditions.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the foundation of a conventional liquid crystal display cell, FIG. 2 is a cross-sectional view thereof, FIG. 5 is a plan view showing an embodiment of the present invention, and FIG. 6 is a cross-sectional view thereof. 4 are sectional views of the main parts, and FIG. 3 is a diagram showing the cutting method. IA...lower substrate, IB...upper substrate, 2...gap agent, 3...liquid crystal, 4...sealant, 5...burr. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. A liquid crystal display cell using a plastic film having a transparent conductive film as a substrate, in which burrs caused by shape cutting of at least one of the upper and lower substrate films do not face the other substrate.