Fast switching dual-frequency liquid crystal cells and...

Details Fast switching dual-frequency liquid crystal cells and... Fast switching dual-frequency liquid crystal cells and...

2003-01-16

2008-12-09

Osorio, Ricardo L (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S097000

Reexamination Certificate

active

07463228

ABSTRACT:
A method for fast switching a dual frequency (FIG.3) liquid crystal cell is disclosed. The liquid crystal cell has opposed substrates (12) with a dual frequency liquid crystal material (18) disposed therebetween. Each substrate has an electrode that is connected to a power supply (20) that is able to apply different voltage magnitudes at different frequencies. And each substrate (12) has an alignment layer that imparts a high pretilt angle to the liquid crystal material, wherein no application of voltage results in the material exhibiting an initial state. A transition driving pulse (104) of a first magnitude is applied to the material at a first frequency to accelerate a transition into a first state from the initial state. A holding pulse (102) of a second magnitude is applied to the material at the first frequency to maintain the first state, wherein the second magnitude is less than the first magnitude.

REFERENCES:
patent: 4380008 (1983-04-01), Kawakami et al.
patent: 5668651 (1997-09-01), Yamada et al.
patent: 6154267 (2000-11-01), Kondo et al.
patent: 2001/0040651 (2001-11-01), Toko
patent: 2004/0191427 (2004-09-01), Wood et al.

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