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:
Oct. 28, 1986
Filed:
Aug. 30, 1983
Charles A Krause, Stevensville, MI (US);
Babu Rajaram, St. Joseph, MI (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
In a video display system having a video random access memory (RAM) including a plurality of color memory banks, with one memory bank for each of the primary colors, provision is made for simultaneously writing to all of the color banks. A central processor unit (CPU) places data onto the system bus and asserts WRT-R, WRT-G and/or WRT-B signals in selectively writing at the same time to any or all of the video RAM banks, where the primary colors are red, green and blue. Logic circuitry coupled to the three RAM banks then gates designated Row and Column Address Strobe (RAS and CAS) signals to each of the color arrays followed by color video data signals. The time required to thus write video display information into the multi-bank video RAM array is thus reduced and system video data throughput correspondingly increased.