Process for injection of liquid crystal into an electrooptical d

Details Process for injection of liquid crystal into an electrooptical d Process for injection of liquid crystal into an electrooptical d

1995-06-06

1996-11-26

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 36, 359 51, 359 80, G02F 11339, G02F 11341, G02F 11333

Patent

active

055791379

ABSTRACT:
A process for fabricating a liquid crystal electro-optical device which includes injecting a liquid crystal material or a mixture of a liquid crystal material and an uncured resin material into a liquid crystal cell. The cell preferably includes, at least, a pair of light-transmitting substrates disposed opposed to each other such that the electrodes placed on the inner surfaces thereof face each other, a uniaxial aligning material provided on the inner surface of at least one of the pair of light-transmitting substrates and a sealing material for sealing the margin of the pair of light-transmitting substrates except for a filling hole. The process basically includes the steps of mounting the liquid crystal material or mixture in the vicinity of the filling hole and covering the liquid crystal material or the mixture that is mounted in the vicinity of the filling hole before injection with a sheet-like substance such that the liquid crystal material or the mixture is not covered completely. The pressure is then reduced in the inner and the surrounding atmosphere of the liquid crystal cell, the liquid crystal cell is heated and the liquid crystal material or the mixture is brought into contact with the filling hole. Then, the pressure of the atmosphere surrounding the liquid crystal cell is increased to thereby inject the liquid crystal material or the mixture.

REFERENCES:
patent: 5430564 (1995-07-01), Harada et al.
patent: 5477356 (1995-12-01), Kobayashi et al.
patent: 5477361 (1995-12-01), Yanagi

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