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:
Apr. 08, 1997
Filed:
Apr. 10, 1996
Applicant:
Inventor:
Abdel H Suboh, Houston, TX (US);
Assignee:
Compaq Computer Corporation, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395750 ;
Abstract
Power is conserved in a video subsystem by inactivating a pixel clock (PCLK) and reducing frequency of a memory clock (MCLK) responsive to an indication of user inactivity. The inactivation of PCLK reduces the power consumed in the RAMDAC, frame buffer, phase lock loop (PLL) clock circuit, and to a smaller extent, the video controller. Reducing the frequency of MCLK conserves power in the video controller and the PLL, while maintaining the integrity of the data in the frame buffer. Significant power savings can be accomplished with minimal BIOS or video controller programming and minimal transfer of state information prior to power-down.