JPS61118726A - Liquid crystal display panel - Google Patents

Abstract

PURPOSE:To improve operativity by charging liquid crystal composition materials through an open part up to specific thickness while plural liquid- crystal display panels succeed and sealing the open part. CONSTITUTION:Oriented films 12 and 13 are formed on a couple of transparent plastic film substrates 10 and 11 with electrodes except an injection port 14 so that electrode surface sides face each other, forming a large-sized cell. Spacers are blown in and dispersed so as to form a constant gap in the cell and liquid-crystal composition materials are charged; and then the cell is evacuated by using a vacuum package material until the liquid-crystal layer attains to a 7mu thickness, and the connection injection port 16 is sealed at a time by thermocompression bonding. Then, the cell is cut in a specific shape into plural liquid-crystal panels.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high performance, high yield liquid crystal display panel.

Structure of the conventional example and its problems In the conventional liquid crystal display panel, as shown in Fig. 1, the transparent electrode 1
Alignment films 5 and 6 are formed on the electrodes 1 and 3 of a substrate 2 having a substrate 2 having an electrode 3 and a substrate 4 having an electrode 3, and the alignment films 5 and 6 are bonded together with a sealant 8 at the periphery to form a cell. After placing the cell in the device and sufficiently reducing the pressure from the outside of the cell through the injection lower to the inside of the cell, immerse the injection port into the liquid crystal composition, and while returning the inside of the vacuum device to atmospheric pressure, inject the liquid crystal composition 9 into the cell. The method was to seal the entrance.

However, in order to inject the liquid crystal composition without leaving bubbles inside the cell, the pressure must be sufficiently reduced to the inside of the cell.
For this reason, the process of injecting the liquid crystal composition took a lot of time. On the other hand, when the area of the cell becomes large, there is a problem that not only is it time consuming, but also that the gap between the center and the periphery of the cell becomes non-uniform. Particularly when the substrate is a plastic film, the upper and lower plastic film substrates come into close contact with each other, making it very difficult to inject the liquid crystal composition.

Purpose of the Invention The present invention eliminates these conventional drawbacks and provides a large quantity of high-quality, high-yield liquid crystal display panels that can be injected with a liquid crystal composition using a simple structure. It is something to do.

Structure of the Invention In the liquid crystal display panel of the present invention, a pair of plastic substrates with electrodes, at least one of which has a transparent electrode, are sealed so that the electrode surfaces thereof face each other, and an open portion is provided in a part of the sealed liquid crystal display panel. This is a liquid crystal display panel characterized in that a plurality of liquid crystal display panels are carried depending on the part, and after filling the liquid crystal composition to a predetermined thickness, each open part is sealed. It is possible to obtain a large amount of liquid crystal display panels in a short time without spending much time.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. However, the invention of the present application is not limited thereto.

First, an alignment film 1 is placed on each of a pair of plastic film substrates 10 and 11 with electrodes, at least one of which is transparent.
2, 13t- are formed so that the electrode surfaces face each other, leaving an injection port 14 to form a large cell as shown in FIG. Next, spacers 16 are blown in to maintain a constant gap inside the cell, the liquid crystal composition is dispersed, and the liquid crystal composition is poured in. Then, the pressure is reduced using a vacuum packaging machine until the liquid crystal layer has a thickness of 7 μm, and the connecting injection port 16 is closed. It is sealed at once by thermocompression bonding, and then cut into a predetermined shape as shown in FIG. 3 to form a plurality of liquid crystal display panels. In this way, the liquid crystal composition does not come into direct contact with the sealing material, resulting in high reliability, and also eliminates the need for a liquid crystal container for liquid crystal injection, a high vacuum device, and the necessary jigs and tools. Manufacturing time has been significantly shortened, and high-quality liquid crystal display panels with uniform panel gaps can be produced in large quantities at once, resulting in significant cost reductions and significant improvements in work efficiency.

Furthermore, with the configuration shown in Figure 4, the liquid crystal composition is injected, a uniform load is applied until the liquid crystal layer has a thickness of 7μ, and then the liquid crystal layer is cut into a predetermined shape to form multiple liquid crystal display panels. The same effect as in the previous example could be obtained by sealing the entrance with adhesive.

Effects of the Invention As described above, the present invention is a method in which a plurality of liquid crystal display panels are connected by open parts, and after filling a liquid crystal composition to a predetermined thickness, each open part is sealed. Even when using a film substrate, the liquid crystal composition can be easily injected in a short time without going through the many steps required in the past.1 This greatly helps improve workability, and it also eliminates the lack of vacuum. , there are no defects such as air bubbles remaining in the cell due to vacuum particles, poor appearance due to non-uniform gaps, etc., improvement in the quality of the LCD panel itself, improvement in yield, and mass production. This is extremely advantageous in practice as it greatly contributes to cost reduction.

By the way, in the drawings showing the embodiment, both substrates 1 of the panel
0.・The shape of 11, the shape of the electrode, and the terminal for applying voltage to them are drawn out to the periphery of the panel, and the size etc. are different, but this point is not an essential problem with the present invention, so the illustration is simplified. It has become

[Brief explanation of drawings]

Figure 1 and B are a plan view of a conventional liquid crystal display panel and a sectional view taken along the line A' of the conventional liquid crystal display panel; Figure 3 is a cross-sectional view at 5'. Figure 3 is a plan view and cross-sectional view of the connecting injection port sealed by thermocompression bonding. Figure 4 is when manufacturing liquid crystal display panels in large quantities. FIG. 1...Transparent electrode, 2, 4...Substrate, 3
······electrode. 6.6...Alignment film, 7...Inlet, 8
... Sealing agent, 9 ... Liquid crystal composition, 1
0.11...Plastic film substrate, 12.
13...Alignment film, 14...Inlet, 1
6...Spacer, 16...Connection inlet, 1A...Panel, 18...Crimp part. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure (A) (B) Figure 2 (A) and CB) Figure 3

Claims (5)

[Claims] (1) A pair of electrode-attached plastic substrates, at least one of which has a transparent electrode, are sealed so that the electrode surfaces thereof face each other, and an open part is provided in a part of the sealed liquid crystal display panel, and the open part allows a plurality of liquid crystal display panels to be connected to each other. 1. A liquid crystal display panel characterized in that a liquid crystal composition is poured in a continuous state to obtain a predetermined thickness, and then each open portion is sealed. (2) The liquid crystal display panel according to claim 1, wherein the liquid crystal layer is made to have a predetermined thickness by reducing pressure after adding the liquid crystal composition. (3) The liquid crystal display panel according to claim 1, wherein the liquid crystal layer is made to have a predetermined thickness by applying pressure after adding the liquid crystal composition. (4) Regarding the liquid crystal display panel described in claim 1, the liquid crystal layer is made to have a predetermined thickness after the liquid crystal composition is added, and the open portion is sealed by thermocompression bonding. LCD display panel. (5) The liquid crystal display panel according to claim 1, wherein after the liquid crystal composition is added, the liquid crystal layer is made to have a predetermined thickness, and the open portions are sealed with an adhesive material.