Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Patent
1991-08-28
1994-02-08
Brier, Jeffery
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
G09G 512
Patent
active
052851974
ABSTRACT:
An apparatus for determining a plurality of video signal characteristics including analog video frequency, horizontal sync frequency and vertical sync frequency produced by a graphics controller providing the video signal to a video display monitor, includes a memory storing bits which correspond to a set of operating characteristics of the video display monitor, a first circuit coupled to the memory for producing voltage fluctuations on a line based on the stored bits in response to a signal which corresponds to a command to set the characteristics of the video signal provided to the video display monitor, and a second circuit for sensing the voltage fluctuations so as to permit determination of the set of operating characteristics. The first circuit includes a switch operatively coupled between a video line and ground to allow grounding of the video line based on the bits so as to produce the voltage fluctuations. The second circuit comprises a logic element for detecting the voltage fluctuations. A method for determining the operating capabilities of the video display monitor is also disclosed.
REFERENCES:
patent: 4574224 (1986-03-01), Nowaczyk
patent: 4679091 (1987-07-01), Kikuchi et al.
patent: 4727362 (1988-02-01), Rackley et al.
patent: 4779132 (1988-10-01), McBeath et al.
patent: 4916442 (1990-04-01), Kim
patent: 4990902 (1991-02-01), Zenda
patent: 4990904 (1991-02-01), Zenda
patent: 4998100 (1991-03-01), Ishii
patent: 5111190 (1992-05-01), Zenda
Atanus Richard
Murray James F.
Schmidt Thomas J.
Smith Arnold J.
Brier Jeffery
NEC Technologies, Inc.
LandOfFree
Method and apparatus for automatic selection of scan rates for e does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for automatic selection of scan rates for e, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for automatic selection of scan rates for e will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-701063