Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1993-05-19
1994-10-04
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 67, 359 84, 359 87, 345 43, 345 87, G02F 11343, G02F 1137
Patent
active
053531353
ABSTRACT:
A matrix liquid crystal display device of the kind having a light shielding matrix (18) in the form of a grid of electrically conductive material carried on the same plate (11) as one set of address conductors (20) and separated therefrom by an insulating layer (21), further includes a feedback circuit arrangement, comprising for example a high gain differential amplifier (40), connected to the matrix which is responsive to voltages on the matrix to apply a correcting voltage tending to maintain the matrix at a predetermined potential, e.g. ground, whereby cross-talk effects due to capacitive couplings between the matrix and the address conductors are reduced.
REFERENCES:
patent: 4759610 (1988-07-01), Yamagisawa
patent: 5157525 (1992-10-01), Eaton et al.
patent: 5265273 (1993-11-01), Goodwin et al.
patent: 5278009 (1994-01-01), Iida et al.
Fox John C.
Parker Kenneth
Sikes William L.
U.S. Philips Corporation
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