Computer graphics processing and selective visual display system – Computer graphic processing system – Plural graphics processors
Reexamination Certificate
2001-09-28
2004-05-04
Chauhan, Ulka J. (Department: 2676)
Computer graphics processing and selective visual display system
Computer graphic processing system
Plural graphics processors
C345S555000, C345S600000, C345S601000, C345S605000
Reexamination Certificate
active
06731290
ABSTRACT:
FIELD OF THE INVENTION
This invention relates generally to graphics controllers, and more particularly to compressing frames within a graphics controller.
BACKGROUND OF THE INVENTION
A graphics controller converts image data and instructions into pixels and stores the pixels in graphics or system memory until time to refresh the image on the display device, at which point the pixels are retrieved from memory and sent to the display device. When the application that is generating the image is idle, the image being displayed does not change from one refresh cycle to the next. However, the graphics controller continues to fetch the corresponding pixels in the memory for every refresh cycle. As a result, the amount of power consumed by fetching the pixels from memory is the same whether the pixels are for an idle or an active image since the power consumption is proportional to memory fetch bandwidth.
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Blakely , Sokoloff, Taylor & Zafman LLP
Chauhan Ulka J.
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