Process for injecting ferroelectric liquid crystal with injectio

Details Process for injecting ferroelectric liquid crystal with injectio Process for injecting ferroelectric liquid crystal with injectio

1993-07-14

1996-08-20

Gross, Anita Pellman

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 62, 359100, G02F 113, G02F 11341

Patent

active

055484280

ABSTRACT:
A ferroelectric liquid crystal panel is prepared by injecting a ferroelectric liquid crystal into a liquid crystal panel through a process including at least four steps, i.e., a first step of reducing a pressure and evacuating gas within the liquid crystal panel, a second step of applying the ferroelectric liquid crystal to an injection port of the liquid crystal panel, a third step of causing the liquid crystal to enter into the liquid crystal panel under an increasing pressure, and a fourth step of completing injection of the liquid crystal into the liquid crystal panel under an elevated pressure. In the process, the liquid crystal panel is held at a higher temperature in the first step than in the second step. As a result, it is possible to obtain a ferroelectric liquid crystal panel which contains a ferroelectric liquid crystal at a sufficiently high packing density, free from occurrence of voids even after standing at a low temperature and has a uniform alignment state over the entire panel area.

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patent: 5029623 (1991-07-01), Brosig
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patent: 5246042 (1993-09-01), Farrell
patent: 5269351 (1993-12-01), Yoshihara
patent: 5355236 (1994-10-01), Mitsui

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