Liquid crystal display device and manufacturing method of...

Details Liquid crystal display device and manufacturing method of... Liquid crystal display device and manufacturing method of...

2007-09-04

2007-09-04

Duong, Thoi V. (Department: 2871)

Liquid crystal cells, elements and systems

With specified nonchemical characteristic of liquid crystal...

Within smectic phase

C349S175000, C349S188000

Reexamination Certificate

active

10621505

ABSTRACT:
The present invention provides a liquid crystal display device having uniform alignment of monostable ferroelectric liquid crystal, and a manufacturing method of the liquid crystal display device. The temperature range of a cholesteric phase or a chiral nematic phase of the phase sequence of the liquid crystal has a temperature width of not less than 3° C. After heating the liquid crystal to an isotropic phase once, the liquid crystal is cooled to room temperature (25° C.) at a cooling rate of 3, 5, 10° C./minute. An alignment treatment is performed by application of a DC voltage of not lower than 3 V, which is a sufficient voltage to obtain the effects of the alignment treatment, within a temperature range of ±3° C. from transition temperature at which the liquid crystal changes from the cholesteric phase to the chiral smectic C phase.

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patent: 2002/0018171 (2002-02-01), Asao et al.
patent: 2000-275685 (2000-10-01), None

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