Driving method of liquid crystal device and driving device...

Details Driving method of liquid crystal device and driving device... Driving method of liquid crystal device and driving device...

2006-01-30

2009-11-17

Liang, Regina (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S094000, C349S033000

Reexamination Certificate

active

07619600

ABSTRACT:
A driving method of a liquid crystal device for recording an image, the liquid crystal device including a liquid crystal layer having a cholesteric liquid crystal, a photoconductor layer accumulated on the liquid crystal layer, and electrodes, includes initializing an entire liquid crystal layer to a focal conic texture by applying a voltage exceeding a threshold value of transition from a planar texture to a focal conic texture, exposing the liquid crystal device imagewise while applying a voltage not exceeding a threshold value from the focal conic texture to a homeotropic texture upon non-exposure but exceeding the threshold value upon exposure and that provides bistability of the focal conic texture and the homeotropic texture with hysteresis upon non-exposure, and fixing a displayed image by releasing an application of voltage to change a part of the liquid crystal layer changed to the homeotropic texture to the planar texture.

REFERENCES:
patent: 6414669 (2002-07-01), Masazumi
patent: 2001/0048414 (2001-12-01), Yamakawa et al.
patent: A 11-237644 (1999-08-01), None
patent: A 11-326871 (1999-11-01), None
patent: A 2000-514932 (2000-11-01), None

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