Optics: image projectors – Methods
Patent
1976-05-03
1978-02-07
Haroian, Harry N.
Optics: image projectors
Methods
353 77, 353122, 350356, G03B 2100
Patent
active
040724115
ABSTRACT:
An improved display device utilizes an electro-optical panel including an electrically insulating layer and a light-modulating layer of dipole, light control particles dispersed in a transparent matrix. An imaging electric charge pattern is impressed on the panel to establish a particle orienting field thereacross. The light modulating pattern thus created in the modulating layer is selectively changed between positive and negative image sense by selective application and removal of a uniform field of the same polarity as, but lesser magnitude than, the imaging charge pattern. The stored image pattern is erasable by application of a reverse polarity field. Preconditioning the panel with a uniform field facilitates a positive light modulating pattern in the first instance.
REFERENCES:
patent: 2290581 (1942-07-01), Donal
patent: 2457981 (1949-01-01), De Forest
patent: 3100817 (1963-08-01), Rosendahl
patent: 3257903 (1966-06-01), Marks
patent: 3485621 (1969-12-01), Kazan
patent: 3512876 (1970-05-01), Marks
patent: 3527525 (1970-09-01), Marks
patent: 3592527 (1971-07-01), Conners
patent: 3732007 (1973-05-01), Kushima et al.
patent: 3833294 (1974-09-01), Kessler
Frank Lee F.
Kaukeinen Joseph Y.
Eastman Kodak Company
Haroian Harry N.
Husser John D.
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