JPH0682740A - Rotary liquid crystal pouring device - Google Patents

Abstract

PURPOSE:To control rotating speed and torque of the device at pouring liquid crystal by utilizing rotational action namely centrifugal force, and to dispense with an evacuating device for air vent by inner fluidizing action of rotation. CONSTITUTION:The whole rotary tank 17 on a rotary table 19 is rotated by means of a motor 20 fitted to the lower part of the device. Liquid crystal is poured into a liquid crystal work 7 (between glass base plates) through a pouring port 11 provided on the lower part of a liquid crystal tank 14. Air introduced inside the centrifugal plane simultaneously by applying pressure from the upper part of a liquid crystal pool tank and by fluidizing action in a pipe due to centrifugal action, is exhausted from an air vent port 12 provided on the upper part.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a liquid crystal display (T
The present invention relates to a liquid crystal injection device for a liquid crystal plate used for FT-LCD).

[0002]

2. Description of the Related Art Conventional injection methods include a dry method, that is, an injection method using a capillary phenomenon, and a wet method, that is, a pressure method (dropping method).

[0003]

Due to the principle and phenomenon, the dry method (capillary phenomenon utilization method) requires a great amount of injection time, and in addition to the problems of air in the liquid crystal injection substrate and air removal contained in the liquid crystal. Vacuuming is required, the size of the device becomes large, and it takes a long time for manufacturing,
It is a bottleneck for improving productivity.

Even in the wet type, since the method is the dropping type, the problem of air bleeding and heavy pressurization are applied to the glass substrate, so that the damage of the substrate due to the weighting is often seen, This is a yield problem.

[0005]

The present invention realizes an improvement in productivity by utilizing a rotational force, that is, a centrifugal force.
Since the injection method of this device utilizes rotational force, that is, centrifugal force, it is a combination of the pressure injection method and the capillary phenomenon utilization method. As shown in Fig. 4, the injection work is set vertically, and at the same time, an air vent hole is provided in the upper part of the glass substrate work, and centrifugal force is applied and applied from the liquid crystal injection port provided in the lower part. Inject by pressure method.

[0006]

FIG. 1 is a diagram showing the structure of a liquid crystal display active matrix type LCD, and the portion relating to the liquid crystal injection portion in the structure is a point relating to the present invention, and the structure is shown in FIG.

The liquid crystal work shown in FIG. 2 is a square tube composed of a glass substrate and a UV curing adhesive applied to the periphery of the substrate to seal the liquid crystal, and the gap in the tube is μm. This liquid crystal work is vertically attached to the device of the present invention.

A liquid crystal injection pressure valve is provided above the liquid crystal tank in FIGS. 5 and 6, and the pressure can be adjusted by injecting an inert gas when the liquid crystal is injected. The liquid crystal contained in the liquid crystal tank is injected into the liquid crystal work by the above pressure and the pressure due to the rotation of the device. At this time, all the air in the liquid crystal work is discharged from the air vent together with the liquid crystal filling.

[0009]

According to this apparatus, the air in the glass substrate work is guided to the inner side of the centrifugal surface by the injection pressure at the time of injecting the liquid crystal and the flow action in the tube by the action of the centrifugal force, and is exhausted from the air vent provided at the upper part. Will be. Similarly, the air contained in the liquid crystal can be extracted from the glass substrate tube which is scattered and extracted from the liquid crystal by the centrifugal force and the impact force when the liquid crystal is injected. Further, as the greatest advantage of this device, the injection flow rate or speed (rotation) can be arbitrarily controlled by adjusting the rotation speed of this device and the liquid discharge pressure provided in the liquid crystal tank. In addition, the device can also improve and improve the problem of air bleeding inside the glass substrate tube.

[Brief description of drawings]

FIG. 1 shows a structural diagram of a liquid crystal display, an active matrix type LCD.

FIG. 2 is an assembly diagram of only a liquid crystal cell substrate (liquid crystal injection work).

FIG. 3 is a diagram showing an outline of a dropping type injection method which is a conventional injection method.

FIG. 4 shows a liquid crystal injection state and a trend of air when the glass substrate for forming a liquid crystal cell according to the present invention is installed vertically.

FIG. 5 shows a schematic representation of the device according to the invention.

FIG. 6 is a schematic view of a device rotating part of the device according to the present invention.

[Explanation of sign]

 1 Deflection Plate 2 Pixel Electrode 3 Color Filter 4 TFT Element 5 Alignment Film 6 Counter Electrode 7 Liquid Crystal Cell Forming Glass Substrate (Liquid Crystal Injection Work) 8 Liquid Crystal 9 UV Adhesive Layer 10 Liquid Crystal Cell Forming Glass Toner 11 Liquid Crystal Injection port 12 Air vent port 13 Liquid crystal injection pressure valve 14 Liquid crystal tank 15 Active gas injection port 16 Liquid crystal supply port 17 Rotary tank tank 18 Rotary tank roller guide 19 Rotary table 20 Rotary table drive motor

Claims (3)

[Claims] 1. A liquid crystal injection device for a liquid crystal display (TFT-LCD), which utilizes the principle of rotational centrifugal force. 2. An injection device used for a liquid crystal display (LCD), or a device for injecting a liquid substance into a space having a small interval of several μm. 3. An apparatus for injecting a liquid substance into a space as narrow as several μm such as a liquid crystal display substrate by using a rotating action, that is, a centrifugal force. The special feature of this device is that the injection pressure or the injection time can be arbitrarily controlled by controlling the rotation speed or the rotation force of the device. Due to the difference in specific gravity, air can be prevented from being mixed in, and the liquid crystal injection amount can be naturally extracted, thus eliminating the need for a conventional vacuuming device.