JPS62215921A - Method for injecting liquid crystal to multi-layer type liquid crystal cell - Google Patents

Abstract

PURPOSE:To improve the operability by positioning the injection ports of each liquid crystal cell on the same side face and shifting and providing them, making sponges in which each different liquid crystal has been impregnated abut on each injection port, pressing these sponges under a vacuum, and injecting simultaneously the different liquid crystals into prescribed cells by one process. CONSTITUTION:A multi-layer type liquid crystal cell 1 is constituted of a cell 2 of the first layer and a cell 3 of the second layer, and these multi-layer cells are surrounded by seal materials 4, 5. Subsequently, in order to inject each different liquid crystal into these cells 2, 3, the respective separate injection ports 6, 7 are pierced in the seal materials 4, 5 of one surface, and sponges 15, 16 in which different liquid crystals 13, 14 have been impregnated are made to abut on the respective injection ports 6, 7. That is to say, separate tanks 11, 12 are filled with the respective different liquid crystals 13, 14, the sponges 15, 16 are immersed into said tanks, they are made to abut on the injection ports 6, 7, an inert gas of nitrogen, etc. is put in gradually the atmosphere under vacuum, and the liquid crystals which have been contained in the sponges 15, 16 are made to invade the inside of the cells 2, 3.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method of injecting a different liquid crystal into each layer in a so-called multilayer liquid crystal cell in which the liquid crystal cell is formed in two or three layers. It is something.

[Prior Art] In general, this type of multilayer liquid crystal cell, ie, a two-layer liquid crystal cell, is injected with liquid crystal as shown in FIGS. 3 and 4.

The structure of the two-layer liquid crystal cell 1 in this case is that the first layer cell 2 and the second layer cell 3 are each provided with a sealing material 4.
5, the injection port 6 of the first layer cell 2 is provided at the left end in the figure, and the injection lower of the second layer cell is provided at the right end in the figure. . In these multi-layer liquid crystal cells, since different liquid crystals must be injected into the cells of each layer, the injection ports for each layer are provided at completely opposite positions a. When a different liquid crystal is injected into each layer, as shown in FIG. is immersed in the liquid crystal 9 in the tank 8, and the liquid crystal 9 is injected into the cell 2 by capillary action. Next, cell 3 of the second layer
When injecting liquid crystal into a cell, the injection lower of the cell 3 is immersed in another tank containing a different type of liquid crystal, and the liquid crystal is injected into the cell 3 under vacuum in the same manner as described above.

[Problems to be Solved by the Invention] In the conventional example having the above-described configuration, when trying to inject different liquid crystals into each layer, the injection process has to be performed separately for the number of liquid crystals, resulting in poor workability. There is a problem.

[Means for Solving the Problems] The present invention provides a multilayer liquid crystal cell as a specific means for solving the problems of the conventional example. The injection ports of each liquid crystal cell are formed on the same side but at different positions, each injection port is brought into contact with a sponge impregnated with the desired liquid crystal, and each layer is formed by pressing each injection port against each sponge under vacuum. 'A' provides a liquid crystal injection method for a multilayer liquid crystal cell characterized by injecting different liquid crystals into the cell, the injection ports of each liquid crystal cell being formed on the same side and at shifted positions. Therefore, sponges impregnated with different liquid crystals can be brought into contact with each injection port at the same time, and different liquid crystals can be simultaneously injected into a multilayer liquid crystal cell under the same vacuum in one step.

[Examples] Next, the present invention will be explained in more detail with reference to illustrated examples. In order to facilitate understanding, the same parts as in the conventional example will be described with the same reference numerals.

In FIG. 1, reference numeral 1 denotes a multilayer liquid crystal cell, that is, a two-layer liquid crystal cell, and the liquid crystal cell 1 has a first layer cell 2 and a second layer cell 3 each having a seal provided on the periphery. 4.5, the injection port 6 of the -mth cell 2 is provided at the lower end on the left side in the figure, and the injection lower of the second layer cell is on the right side in the figure. It is provided at the bottom end. In other words, the injection ports 6 and 7 of both cells 2.3 open on the same side and are provided at different positions.

Thus forming a liquid crystal cell 1, separate injection tanks 11 are provided as means for injecting different liquid crystals into each cell 2.3.
．． 12 and a different liquid crystal 1 in each injection tank.
3.14 is put in the specified a, and the sponge 15. I.G.
to impregnate the liquid crystal.

Then, as shown in FIG. 2, each injection port 6.7 of the liquid crystal cell 1 is connected to the sponge 15, 16 under vacuum.
When the liquid crystals 13 and 14 are pressed against each other, different liquid crystals 13 and 14 are separately injected into each cell 2.3 by capillary action. In this case, by gradually introducing inert gas from a nitrogen gas cap into the vacuum atmosphere,
The gas pressure allows the liquid crystal to be quickly injected into each cell 2.3. In the above embodiments, a two-layer structure has been described, but it goes without saying that three or more layers can be used in the same manner.

[Effects of the Invention] As explained above, in the liquid crystal injection method for a multilayer liquid crystal cell according to the present invention, it is specified that the injection ports of each liquid crystal cell are formed on the same side and at shifted positions, and By bringing sponges impregnated with different liquid crystals into contact with the inlets and pressing each injection port against each sponge under vacuum, different liquid crystals are injected into the liquid crystal cells of each layer, so even in a multilayer system, Different liquid crystals can be simultaneously injected into a predetermined cell in one process, and the manufacturing process is extremely simple and the workability is extremely high.

Furthermore, by gradually introducing an inert gas into the vacuum atmosphere when injecting liquid crystal, an excellent effect can be achieved in that the liquid crystal can be injected into each cell more quickly.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of a multilayer liquid crystal cell in which the method of the present invention is carried out, Fig. 2 is a front view showing a state in which liquid crystal is injected into the same liquid crystal cell, and Fig. 3 is a conventional FIG. 4 is a partially cutaway front view of the example multilayer liquid crystal cell, and FIG. 4 is a front view showing a state in which liquid crystal is injected into the same liquid crystal cell.

Claims (2)

[Claims] (1) In a multilayer liquid crystal cell, the injection ports of each liquid crystal cell are formed on the same side but at different positions, a sponge impregnated with a different liquid crystal is brought into contact with each injection port, and each injection port is placed under vacuum. A liquid crystal injection method for a multilayer liquid crystal cell, characterized in that a different liquid crystal is injected into the liquid crystal cell of each layer by pressing the liquid crystal onto each sponge. (2) The method for injecting liquid crystal into a multilayer liquid crystal cell as described in item 1 above, characterized in that an inert gas is introduced into the atmosphere under vacuum.