Full color cholesteric liquid crystal display

Details Full color cholesteric liquid crystal display Full color cholesteric liquid crystal display

2007-11-13

2007-11-13

Nelms, David (Department: 2871)

Liquid crystal cells, elements and systems

With specified nonchemical characteristic of liquid crystal...

Within cholesteric phase

C349S185000

Reexamination Certificate

active

10098988

ABSTRACT:
A cholesteric display may be formed, in some embodiments, using a single display element to produce multi-colors for display. A cholesteric material may be sandwiched between a pair of substrates, each associated with a first pair of opposed electrodes that are arranged generally transversely to the optical axis of incident light. The first pair of electrodes produce one of two liquid crystal states and result in the reflection of light of a particular wavelength. Light of other wavelengths may be reflected when a second pair (or set) of opposed electrodes, arranged generally transversely to the first pair of electrodes, are biased appropriately. A color display may be generated from a single display element by modulating the pitch length of the cholesteric material.

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Frederic J. Kahn, Physical Review Letters, Feb. 1990, vol. 24, pp. 209-212.

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