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.
Patent No.:
Date of Patent:
Jan. 16, 1990
Filed:
Jun. 24, 1988
David C Frankenbach, La Habra, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A video signal generator employs a host subsystem (11), display controller system (18), display generator subsystem (20), refresh memory subsystem (24), and video data system (28) to process pixel data in parallel to achieve high pixel frequency rates permitting large flicker-free images. To achieve high pixel frequencies, parallel processing is maintained from the bit map memory (36) until the data is processed by the digital-to-analog converter (DAC) (54). The display generator subsytem (20) outputs a multi-bit digital data address signal (35) which is used to address a plurality of bit map memory (BMM) arrays (36). The BMM arrays (36) operate in parallel, and the data (35) is read into a portion of each BMM array (37, 39) until the array (37, 39) is filled. The data is read out of the arrays (37, 39) in parallel (32) and into a plurality of BMM output multiplexers (MOM) (38), new data continuously being read into each BMM array (37, 39). The MOM (38) time division multiplexes the data signal (32) into data nibbles (26), of fewer bits, representing the color intensity of the data signals (32). The data nibbles (26) are multiplexed by a plurality of video multiplexers (40) to produce a multi-bit color intensity code )44) which is used to address a plurality of color look-up tables (CLUTs) (40). The CLUTs (40) select the array data for display, and generate color codes (48). The color codes (48) are multiplexed to the desired pixel frequency rate and are input into DACs (54) to drive a monitor (58).