Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Patent
1998-03-02
2000-05-23
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
G09G 500
Patent
active
060670835
ABSTRACT:
A method and apparatus for processing video graphics utilizing less power is accomplished by providing a clock circuit that generates a clock signal. The clock signal is fed to a synchronization circuit that generates horizontal and vertical retrace. The clock signal is also provided to a look-up table DAC (digital to analog converter), or a palette DAC. While the video graphics circuit is processing data for display, the clock circuit provides the clock signal to the both the look-up table DAC and the synchronization circuit. When the data being processed is non-video data (i.e., the horizontal and vertical synchronization information), the clock circuit ceases to provide the clock signal to the look-up table DAC, which disables the look-up table DAC. Thus, it is not consuming power. The clock circuit again provides the clock signal to the look-up table DAC when the data being processed is video data (i.e., the data that is to be displayed).
REFERENCES:
patent: 5861879 (1999-01-01), Shimizu et al.
Caruk Gord
Glen David
Lee Keith
Verma Raj
ATI Technologies Inc
Hjerpe Richard A.
Nguyen Kevin M.
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