Rca Inc.

General Electric Company

Rca Licensing Corporation

John T Fischer

Roger Green Stewart

Glynn G Gillette

John A Van Raalte

Robert Milton Moore

Charles John Busanovich

A drive circuit for a liquid crystal display includes a counter for each column of the display. The counters are set with brightness counts to establish the grey scales for the pixels. The counters turn transfer gates on when a count is present and off when the count is zero. An analog generator biases the columns through the transfer gates so that each column is biased to a level determined by the brightness count of the respective counter.

Display device drive circuit

A flat panel display device is divided into channels and includes deflection electrodes for scanning electron beams horizontally across the channels. Convergence electrodes are voltage biased to converge the electron beams at points along the transverse line scanned by the electron beams. A compensation voltage generator provides compensation voltages to compensate for horizontal landing errors of the electron beams.

System for correcting for color impurities due to horizontal beam

A system for applying grey scale codes to a display device having a plurality of columns of pixels, has a segmented shift register, with one shift register segment for each pixel column. Data stored in the shift register segments are transferred to counters through multiplex circuitry. The counters control transfer gates by which voltages are applied to the pixel columns.

System for applying grey scale codes to the pixels of a display device

A low dark current photoconductive body includes an aluminum oxide overlayer on a cadmium selenide base layer. A transition region is provided at the interface region between the base layer and the overlayer and consists of a graded transition of cadmium and selenium with increasing amounts of aluminum and oxygen. An alternative body is disclosed omitting the overlayer. A blocking contact is provided within a portion of the body including the overlayer and/or the transition region.

Growing community of inventors

Princeton, NJ, United States of America

John T Fischer