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. 05, 1999
Filed:
Oct. 11, 1996
Raymond MY. Wong, Milpitas, CA (US);
Richard LC. Chang, Cupertino, CA (US);
Silicon Motion, Inc., San Jose, CA (US);
Abstract
A single-chip video-graphics controller includes a novel circuit for eliminating full line buffers when reducing line-to-line flicker in a display image of non-interlaced data on an interlaced color display device such as an NTSC or television projector. The flicker reduction circuit uses a pair of memory access agents for concurrently fetching even and odd interlace frames of the display image. Corresponding color pixels of the two frames are averaged on-the-fly, and the averaged output is converted to analog RGB output signals for driving the display device. The elimination of the full line buffers results in a savings of approximately 30,000 transistors per buffer and a corresponding reduction in operating power. A specific embodiment of the controller includes a vertical stretching circuit used to adjust the number of vertical lines corresponding to the display image permitting the vertical reformatting of any display image.