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. 06, 1998
Filed:
Jun. 22, 1992
Phillip Eugene Mattison, Gilbert, AZ (US);
VLSI Technology, Inc., San Jose, CA (US);
Abstract
A circuit and method for providing VGA display data to a display of lower resolution, such as an LCD panel, is disclosed. The circuit detects a write to the Frame Buffer that stores the full resolution VGA image, determines the address within the Frame Buffer that was changed, then translates the Start Address of the circuit such that the recently updated data will be displayed at or near the center row of the display. The circuit blocks accesses to display data outside the range of data displayed on the lower resolution display such that the operation of the circuit is transparent to a conventional VGA controller, thereby providing automatic virtual display panning for VGA data that is displayed on a lower resolution display such as an LCD panel.