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:
Mar. 20, 2001
Filed:
Jul. 17, 1998
Lawrence Chee, Vancouver, CA;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A computer system includes one or more display devices, such as a cathode ray tube (CRT) or liquid crystal display (LCD) for providing a visible display to a user of the computer system. The computer system includes a video display controller (VDC) with a graphics generator. This VDC receives image information, such as text or graphics generated by a processor (CPU) or retrieved by the CPU from another facility (such as a CD-ROM) of the computer system, and provides signals driving one or both of the CRT or LCD displays. The VDC includes a sequencer and controller (SEQC) for a dynamic random access memory (DRAM) which is interfaced with the VDC. The SEQC arbitrates requests from various devices of the computer system for access to the DRAM, and facilitates these access according to a multi-tiered priority scheme. Accordingly, more efficient access to the DRAM is insured for the various devices of the computer system, and utilization of the DRAM, as well as the time of devices which are sometimes required to wait for access to the DRAM is improved.