Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1992-12-04
1994-07-26
Gross, Anita P.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359103, G02F 113
Patent
active
053330749
ABSTRACT:
A display device comprising a display cell consisting of a substrate which is formed by two oppositely located plates whose facing sides are provided with electrode layers to which an orientation layer is applied and a sealing material which is provided between the end portions of the plates, a liquid crystalline material being filled into the space between the plates and the sealing material. In said display device, the liquid crystalline material is locally formed into a polymer network in accordance with a desired pattern. By virtue thereof, the desired pattern of picture elements can be designed with a substantial degree of freedom because it is possible to locally raise the switching threshold of the liquid crystalline material if image formation is not desired at locations where electrodes or conductor patterns cross each other.
REFERENCES:
patent: 4688900 (1987-08-01), Doane et al.
patent: 5194973 (1993-03-01), Isogai et al.
patent: 5204763 (1993-04-01), Hikmet
patent: 5208687 (1993-05-01), Yoshida et al.
patent: 5210630 (1993-05-01), Heynderickx et al.
patent: 5262882 (1993-11-01), Hikmet
Gross Anita P.
Spain Norman N.
U.S. Philips Corporation
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