JP3234102B2 - Jig for liquid crystal material injection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to computer image display, liquid crystal television, automobile instrument panel,
The present invention relates to a method of manufacturing a liquid crystal shutter and a liquid crystal display panel used for a display component of a measuring instrument.

[0002]

2. Description of the Related Art According to the prior art, a jig for injecting a liquid crystal material supplies a fixed amount of a liquid crystal material 9 to a tray 5, as shown in FIG. 3, and is set in a chamber. Cell 1
In the cell support 13, the injection port is floated at a position corresponding to the upper part of the liquid crystal material surface. Next, when the inside of the chamber is depressurized, the injection port is immersed in the liquid crystal material surface, and the inside of the chamber is brought to the atmospheric pressure. Leak. Depending on conditions, pressure may be applied after leakage. At this time, a liquid crystal material is injected into the cell due to a pressure difference between the inside of the cell and the outside air. This method is commonly referred to as immersion pouring.

Further, as shown in FIG. 4, recently, the cell 1 is not directly immersed in the liquid crystal material 9 but is injected through a highly absorbent material 2 (for example, glass fiber filter paper) therebetween. Tools are also used. The jig configuration using the superabsorbent material 2 is such that the superabsorbent material 2 is fixed in a state where the superabsorbent material 2 is wound around a block 3 formed into a prism shape, and is inserted into the tray 5 filled with the liquid crystal material 9. It is. The superabsorbent material 2 plays a role of constantly supplying the liquid crystal material 9 in the tray 5. In an actual operation, a liquid crystal material is injected into the cell using a pressure difference, as in the above-described immersion injection.

[0004]

In the prior art immersion injection method using a liquid crystal material injection jig, the liquid crystal material adheres to the cell injection port side end surface at the time of injection due to the large area of the cell contacting the liquid crystal material. In addition, the liquid crystal material is simultaneously sucked up from the gap between the substrates at the outer peripheral portion of the cell seal, so that the amount of the liquid crystal material taken out increases and the use efficiency decreases.

[0005] Next, in the injection method using a liquid crystal material injection jig utilizing a highly absorbent material, first, a block jig for installing the highly absorbent material is required. For the block, it is necessary to select a material that causes less precipitation of impurities. For example, when a SUS material or the like is selected, there is a disadvantage that the cost required for processing is increased and the delivery time is long.

Secondly, when a large cell is injected or when injection is continuously performed, the highly absorbent material wound around the block comes into contact with the outside air, so that impurity gas is taken in. Deficiency causes quality problems such as bubbles in the cell. Third, when a small cell is injected, it is necessary to reduce the width of the block. However, there are limitations in processing, and further, in order to wrap the highly absorbent material around the block, the workability is taken into consideration. A width of ７7 mm or more is required, and a thin block cannot be set, and the above-described immersion injection method has to be adopted for small cells.

As described above, the conventional injection method using the liquid crystal material injection jig has various disadvantages.

[0008]

In order to solve the above-mentioned problems, an injection jig according to the present invention is provided with a receiving tray 5 for holding a liquid crystal material 9 and a liquid crystal material 9 for injecting the liquid crystal material 9 into a cell 1 through an injection port 11. The gap 2 is kept at a constant width by the superabsorbent material 2 and the spacer 8 for fixing the superabsorbent material 2 and the fixing device.
The liquid crystal material 9 is a jig for injecting the liquid crystal material 9 into the highly absorbent material 2 from the inside of the plate 5 by receiving the liquid crystal material 9 through the capillary tube 14 having a space between the blocks 3 and 4. . This is a jig that achieves stable liquid crystal material supply and injection using a highly absorbent material for small cells.

According to the injection method using the liquid crystal material injection jig of the present invention, first, the injection jig is constituted by a simple block, so that the jig is simplified. Further, it is possible to make the block width narrower than the block of the conventional method.
Second, the gap between the blocks can be adjusted,
The ability to replenish the liquid crystal material to the super absorbent material can be easily controlled.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a representative jig for injecting a liquid crystal material of the present invention. FIG. 2 is a perspective view of the jig for injecting a liquid crystal material of the present invention.

First, the structure of the jig for injecting liquid crystal material of the present invention will be described. The jig is assembled by sandwiching two symmetrical prism-shaped blocks 3 and 4 with fixing devices (bolts 6 and nuts 7) and a spacer 8 for adjusting a gap between the blocks. Selection of materials used for blocks 3 and 4
A metal, alloy, or the like that does not cause impurities to precipitate in the liquid crystal material is used (for example, SUS304). In blocks 3 and 4,
Several holes for inserting bolts and nuts are provided in advance.
A high-absorbency material (for example, glass fiber filter paper or sponge) for injecting a liquid crystal material into the cell is cut out smaller than the inner area of the high-absorbency material guide 10 on the block and inserted into the guide 10. . The super absorbent material 2
Fix to blocks 3 and 4 with clips or the like so as not to move. Groove processing is performed on the upper part of the block so that the liquid crystal material in the highly absorbent material does not flow out. The injection jig configured as described above is inserted into the tray 5.

Next, an injection method using the jig of the present invention will be described. The liquid crystal material is supplied to both the pan and the highly absorbent material. At the time of supply, the superabsorbent material 2 is adapted to be compatible with the liquid crystal material 9. Next, the cell 1 is supported by the cell support 13.
Then, the cell injection port 11 is fixed at a position corresponding to the upper part of the superabsorbent material 2, and the pressure in the chamber is reduced by evacuation.
When the desired degree of vacuum is reached, the inlet is lowered until it completely contacts the superabsorbent material 2, and the chamber is left at atmospheric pressure. After the leak, pressure treatment may be performed as necessary. The liquid crystal material 9 is injected into the cell from inside the highly absorbent material 2. Due to the injection, the insufficient liquid crystal material in the superabsorbent material is removed from blocks 3 and 4 in the tray.
The gap between the capillaries (capillaries 14) is pushed up by capillary action and is replenished to the superabsorbent material in an appropriate amount. The supply amount of the liquid crystal material 9 is controlled by changing the thickness of the spacer between the blocks. It is necessary to set the gap to 3mm or less.
In the following, when the capillary action is reduced, outside air (air) is mixed into the liquid crystal material 9 to generate bubbles in the cell or to reduce the ability of the highly absorbent material to replenish the liquid crystal material.

[0013]

As described above, the injection method using the liquid crystal material injection jig of the present invention employs a conventional injection method using a highly absorbent material, and is designed by simplifying the block structure. The simplification of the process and the reduction of the jig cost by shortening the manufacturing time and the narrower width than the conventional jig make it possible to apply injection using a highly absorbent material to small cells, The use efficiency of the material was significantly improved.

Further, the quality of the liquid crystal panel can be improved by stabilizing the replenishing amount of the liquid crystal material from the pan to the highly absorbent material.

[Brief description of the drawings]

FIG. 1 is a sectional view of a jig for injecting a liquid crystal material of the present invention.

FIG. 2 is a perspective view of a jig for injecting a liquid crystal material of the present invention.

FIG. 3 is a cross-sectional view of a conventional liquid crystal injection jig.

FIG. 4 is a sectional view of a jig for injecting a liquid crystal material using a high-absorbency material according to the prior art.

[Description of Signs] 1 cell 2 super absorbent material 3, 4 block 5 tray 6 bolt 7 nut 8 spacer 9 liquid crystal material 10 super absorbent material guide 11 inlet 12 seal 13 cell support 14 capillary

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G02F 1/1341

Claims (3)

(57) [Claims] And 1. A pan for filling the liquid crystal material, a pair of block material to form a gap to face each other, and superabsorbent material provided in an upper portion of the block member, the
The liquid crystal material is provided by capillary action generated in the gap.
A jig for injecting a liquid crystal material, wherein the jig is supplied to the highly absorbent material . 2. The high absorbency is provided on the block material.
A contractor characterized by forming a guide for inserting the material.
The jig for injecting a liquid crystal material according to claim 1. 3. The apparatus according to claim 2, wherein said gap is adjustable.
The jig for injecting a liquid crystal material according to claim 1.