Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1994-03-08
1996-02-06
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 78, 359100, 359 81, 359 51, G02F 11343, G02F 11337, G02F 113, G02F 11339
Patent
active
054900018
ABSTRACT:
A ferroelectric liquid crystal device including a pair of substrates each having an electrode, one of the substrates being subjected to an uniaxially-orienting treatment (one direction orientation treatment), and the other being subjected to no uniaxially-orienting treatment, and a layer of ferroelectric liquid crystal material interposed between the substrates is disclosed. The layer includes a liquid crystal region in which stripe patterns occur by application of an alternating electric field to the liquid crystal to scatter light incident to the device. A method of driving a ferroelectric liquid crystal device is also disclosed. The tone and intensity of the incident light can be controlled by controlling a voltage and/or frequency of the alternating electric field in accordance with the method.
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Coates et al., "Electrically Induced Scattering Textures in Smectic A Phases and Their Electric Reversal", J. Phys. D: Appl. Phys., vol. 11 1978, pp. 2025-2034.
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Ferguson Jr. Gerald J.
Semiconductor Energy Laboratory Co,. Ltd.
Sikes William L.
Smith Evan R.
Trice Ron
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