Computer graphics processing and selective visual display system – Computer graphics display memory system – Memory partitioning
Reexamination Certificate
2005-11-29
2005-11-29
Tung, Kee M. (Department: 2676)
Computer graphics processing and selective visual display system
Computer graphics display memory system
Memory partitioning
C345S545000, C345S001100
Reexamination Certificate
active
06970173
ABSTRACT:
A system and method is provided for supporting a multiple display configuration through a single connected display device. The present disclosure allows a system desktop to be expanded across multiple virtual displays without a need for extra hardware to support multiple display devices. A display driver partitions a frame buffer of a video card into portions. Each portion is used to support a different virtual display. The display driver reports a number of virtual displays to an operating system and provides pointers to addresses associated with the portions of the frame buffer. The operating system treats each frame buffer portion as a separate frame buffer and stores video data for each virtual display in an associated frame buffer portion. The display driver selects a virtual display from a set of multiple virtual displays and routes video data from the frame buffer portion associated with the selected display for output on a connected display device.
REFERENCES:
patent: 6232932 (2001-05-01), Thorner
patent: 6411302 (2002-06-01), Chiraz
ATI Technologies Inc.
Toler Larson & Abel, LLP
Tung Kee M.
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