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:
Jul. 15, 1997
Filed:
Apr. 28, 1995
Alex Tang, Hsin-Chu, TW;
United Microelectronics Corp., Hsinchu, TW;
Abstract
An image register for a graphics display includes a pair of static random access memory (SRAM) devices for respectively storing image data associated with even numbered and odd numbered pixels, which correspond to even numbered and odd numbered addresses. The register includes a counter presettable to an initial value corresponding to a starting address of the stored image data. A half adder is coupled to the counter for addressing the SRAMs according to an even and odd state. Two NAND gates responsive to the least significant bit of the counter control the two SRAMs for simultaneously writing image data having a modified color code portion into the even SRAM and reading stored image data from the odd SRAM during an even state, and for simultaneously reading stored image data from the even SRAM and writing the modified color code into the odd SRAM during an odd state. The register includes a pair of full adders to mix an incoming color code with the stored color code to obtain the modified color code. The simultaneous access to consecutive pixels enables parallel processing to occur, thus improving execution speed.