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:
Jan. 12, 1993
Filed:
Jun. 13, 1990
James L Taaffe, Arlington, MA (US);
Massachusetts General Hospital, Boston, MA (US);
Abstract
A multiple memory display controller provides simultaneous display of overlaid image and graphic data in a computer display system. A video random access memory (RAM) in the display controller stores display data corresponding to graphics to be displayed on the computer display monitor. And a series of dynamic RAMS in the display controller stores display data corresponding to images to be displayed on the computer display monitor. A data mixer receives and mixes signals from the video RAM and one of the dynamic RAMs to form signals which are used to drive the display monitor. The signals provide graphics displayed at one resolution overlaid on images displayed at a different resolution on the monitor. A first-in first-out (FIFO) buffer and rectangle loader provide efficient loading of blocks of display data in the display controller memories.