G - Physics – 01 – R
Patent
G - Physics
01
R
375/35
G01R 13/22 (2006.01) G01R 13/26 (2006.01) G01R 17/04 (2006.01)
Patent
CA 1145492
PHN 9476 9.5.80 ABSTRACT: Device for displaying an analog signal on a display screen. A device for displaying an analog signal on a display screen which is scanned by means of a line deflec- tion generator and a frame deflection generator. The de- vice comprises a signal processing device for forming a processed signal by repeating the analog signal at the line deflection frequency, a reference voltage generator for generating a reference voltage which is dependent on the frame deflection voltage, and a comparator for com- paring the reference voltage and the processed signal and for generating a control signal which causes a brighten- ing of the scanned display screen when both signals are approximately equal. In order to improve the picture qua- lity, the device comprises means for adding a varying auxiliary signal to the processed signal. The frequency of this auxiliary signal amounts to at least ten times the line deflection frequency.
353513
Fetherstonhaugh & Co.
N.v. Philips Gloeilampenfabrieken
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