The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Aug. 06, 1996

Filed:

Nov. 19, 1993
Applicant:
Inventors:

Randall S Farwell, San Diego, CA (US);

Robert W Shaw, Escondido, CA (US);

Roger N Marshall, Solana Beach, CA (US);

Assignee:

Proxima Corporation, San Diego, CA (US);

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
345150 ; 345147 ; 345148 ;
Abstract

A method and system for producing a finely textured display image of a gradation of high color resolution color shading. The high color resolution system is adapted to be coupled to a relatively inexpensive high speed active matrix display panel employing single-bit LCD drivers and a plurality of sub-pixel elements. The system includes a sub-pixel activation circuit for generating single-bit digital signals for driving individual ones of the sub-pixel elements. A duty cycle circuit arrangement controls the sub-pixel activation circuit to cause desired ones of the sub-pixel elements to be activated selectively an average number of times over a large number of consecutive frame time intervals to generate sub-pixel images having desired perceived color shading levels. A fixed pattern generator responsive to a desired color shading level signal, controls the duty cycle circuit arrangement to activate sub-pixel elements to the desired perceived color shading levels and assigns color codes to groups of sub-pixel elements to produce color blending sub-pixel patterns that help to inhibit substantially color contouring between adjacent sub-pixel element images exhibiting a plurality of different color shading levels of a single primary color. The high resolution display system also includes a video interface module for coupling either RGB analog signals or RGB digital signals to the high speed LCD display panel.


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