Patent
1978-12-11
1981-08-11
Sikes, William L.
G02F 129
Patent
active
042831202
ABSTRACT:
A light valve projection system in which information is impressed on a light modulating fluid overlaying a rotatable disk wherein incident light is modulated by said information and projected onto a viewing surface, said fluid including a raster upon which said information is written by the deposition of electric charge along scanning lines so as to form orthogonally related diffraction gratings which are parallel to a pair of coordinate axes in the plane of said disk. The raster is positioned on said disk offset from said coordinate axes so that movement of said fluid responsive to disk rotation is along paths that intersect said diffraction gratings, which is found to provide a more uniform fluid thickness and light transmission efficiency within the raster and to improve certain aspects of the projected information.
REFERENCES:
patent: 3251940 (1966-05-01), Roussin
patent: 3265811 (1966-08-01), Ellis
patent: 3275748 (1966-09-01), Knoll et al.
patent: 3489940 (1970-01-01), Towlson
patent: 3489941 (1970-01-01), Towlson
Good, "A New Approach to Color Television Display and Color Selection Using a Sealed Light Valve", Proc. of Nat. Elect. Conf., vol. 24 (1968), pp. 771-774.
Orser David A.
Towlson Howard E.
True Thomas T.
General Electric Company
Jr. Leon Scott
Sikes William L.
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