Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1992-04-13
1992-11-17
Howell, Janice A.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 78, 359 90, 359100, G02F 1133
Patent
active
051648520
ABSTRACT:
A liquid crystal layer interposed between a pair of glass substrates is re-oriented for the purpose of eliminating zig-zag dislocations and providing a clear threshold voltage. First, the liquid crystal layer is transformed by elevating the temperature into an isotropic phase which affords a low viscosity, and then applied with an alternating electric field in order to urge the liquid crystal layer to be oriented in a direction parallel with the substrates. Next, the liquid crystal layer is gradually cooled to room temperature while the electric field application continues.
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Duong Tai V.
Howell Janice A.
Semiconductor Energy Laboratory Co,. Ltd.
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