Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Patent
1997-08-11
2000-09-05
Liang, Regina
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
345 3, G09G 500
Patent
active
061150320
ABSTRACT:
The present invention allows a single display controller design to be used in multiple markets by providing an additional stand-alone circuit which converts conventional analog CRT display signals to digital flat panel display or other digital display signals. A single VGA CRT controller may be implemented in both desktop and portable (e.g., laptop) markets thereby reducing the cost of the display controller through the economies of scale. For a laptop or other digital display markets, the apparatus of the present invention may be applied to a conventional analog CRT controller to convert analog CRT signals to digital laptop signals to generate a display on a flat panel display or other digital device. In addition, the apparatus of the present invention may be incorporated into a stand-alone flat panel display intended for use as a replacement for conventional CRT monitors. The apparatus of the present invention accepts a conventional analog CRT input and outputs digital flat panel display signals. When packaged with a flat panel display intended for the desktop PC market, the present invention provides an overall apparatus which is plug-in compatible with prior art analog VGA controllers. The apparatus of the present invention may also incorporate flat panel protection circuitry to prevent damage to a flat panel display during testing or the like. In addition, the present invention further encompasses an apparatus for providing flat panel protection in a stand-alone circuit.
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Cirrus Logic Advance Hardware Reference Manual, Version 1.1, pp. 12-178 through 12-179, Jun. 1996.
Bindlish Rakesh K.
Kotha Sridhar
Bell Robert P.
Cirrus Logic Inc.
Liang Regina
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