Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Patent
1997-06-10
1999-03-23
Bayerl, Raymond J.
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
39575005, 39575006, G06F 132
Patent
active
058866892
ABSTRACT:
A computer system includes an operator input device, a central processing unit (CPU), and a display device, such as a liquid crystal display (LCD) or cathode ray tube (CRT) providing a visible image to the computer user as an output of computer activity. The computer system includes a video display controller (VDC) with a graphics generator. This VDC receives image information, such as text or graphics generated by the CPU, or retrieved by the CPU from another facility (such as a CD-ROM) of the computer system, and responsively provides image signals driving the CRT or LCD display. The VDC includes a power saving controller implementing one of several available power saving modes dependent upon one or more of several possible inputs. Each of the power saving modes includes the same list of VDC functions which may individually be enabled or disabled in each power saving mode dependent upon a bit value entered into a register of the power saving controller. Each of the power saving modes is ranked with the others in an order of succession. Accordingly, when each mode of power saving is enabled, it disables the lower-ranked modes of power saving. In turn, each mode of power saving is disabled and succeeded if a higher-ranked mode is enabled.
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Bystricky Juraj
Chee Lawrence
Cheng Brett
Gillett Kevin
Tucker David
Bayerl Raymond J.
Gabrik Michael T.
Seiko Epson Corporation
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