Driving method for liquid crystal device which is not affected b

Details Driving method for liquid crystal device which is not affected b Driving method for liquid crystal device which is not affected b

1993-08-24

1995-11-21

Gross, Anita Pellman

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

345 97, G02F 11343

Patent

active

054692814

ABSTRACT:
A liquid crystal device of the type including pixels, comprises a liquid crystal having a first and a second stable state, and which is stably driven for gradation display regardless of a change in threshold characteristic due to a temperature change, etc. The driving method includes the steps of: providing a pixel showing a transmittance (Ts) smaller than a prescribed transmittance (Tm), resetting the pixel to the first stable state and then applying at least two signals of alternating polarities to the pixel to obtain the transmittance (Ts); and providing a pixel showing a transmittance (T1) larger than the prescribed transmittance (Tm), resetting the pixel to the second stable state and then applying at least two signals of alternating polarities to the pixel to obtain the transmittance (T1).

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