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. 16, 1999
Filed:
Oct. 22, 1996
Byeonghwan Jeon, Kyungki-do, KR;
Abstract
There is disclosed a graphics overlay device for overlaying a video signal and a graphics signal and outputting the overlayed signal, the graphics overlay device including a frame memory for storing video data, a video address generator for generating a video address which designates an area of the frame memory to read therefrom or store therein, at least two graphics overlay memories for reading and writing graphics data alternatively by a predetermined period wherein the writing is performed on an area designated by a graphics address and the reading is performed on an area designated by the video address, a multiplexer for selecting and outputting graphics data output from one of graphics overlay memories, a look up table for overlaying the video data output from the frame memory and the graphics data output from the multiplexer and outputting the overlayed data, and a central processing unit for generating the graphics data which designates an area of the graphics overlay memories on which the graphics data is to be stored, and a select controlling signal which controls recording and reading operations of the graphics overlay memories, and a switching operation of the multiplexer.