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:
Dec. 03, 2002
Filed:
Dec. 21, 1998
Applicant:
Inventors:
Yasuhiro Ishibashi, Tokyo, JP;
Hiroki Zenda, Tokyo, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 5/00 ;
U.S. Cl.
CPC ...
G09G 5/00 ;
Abstract
A VGA controller has a pass through mode and VRAM mode as motion picture display modes, and one of these display modes can be selected by controlling a switch. In the pass through mode, video data input from a video port interface can be directly output to an NTSC/PAL encoder without the intervention of a VRAM. In this mode, original video data can be displayed on a TV with its original quality. On the other hand, in the VRAM mode, the refresh rate for screen display is matched with the vertical sync frequency of video data, and a high-quality image free from any “tearing” can be obtained.