Computer graphics processing and selective visual display system – Data responsive crt display control – Crt provides display control
Reexamination Certificate
2007-07-24
2007-07-24
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Data responsive crt display control
Crt provides display control
C345S012000, C345S013000
Reexamination Certificate
active
10701151
ABSTRACT:
A control circuit of a power supply delivering a supply current to an inductor connected in series with the horizontal deflection yoke of a cathode ray tube display, the inductor being the primary coil of a transformer operatively connected for delivering a rectified low-pass filtered biasing voltage to the anode of the display, the low-pass filtering having a first time constant corresponding to the duration of a plurality of pictures, the control circuit having feedback circuitry for generating a monitoring voltage substantially proportional to the biasing voltage and for controlling the supply current to keep the monitoring voltage equal to a reference voltage; and feedforward circuitry for measuring the cathode current and for adding to the monitoring voltage a compensation voltage corresponding to the cathode current, low-pass filtered with a second time constant corresponding to the duration of a small number of lines and high-pass filtered with the first time constant.
REFERENCES:
patent: 5717296 (1998-02-01), Onozawa et al.
patent: 6573669 (2003-06-01), Chiu
Hjerpe Richard
Jorgenson Lisa K.
Lesperance Jean
Morris James H.
STMicroelectronics S.A.
LandOfFree
Control circuit and process for a cathode ray tube display... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control circuit and process for a cathode ray tube display..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control circuit and process for a cathode ray tube display... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3779770