Digital circuit system for television receivers with cathode ray

Details Digital circuit system for television receivers with cathode ray Digital circuit system for television receivers with cathode ray

1988-12-05

1989-10-03

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

315371, H04N 568

Patent

active

048720607

ABSTRACT:
A deflection processor generates deflection signals such that the video information of the received signal is visible on the picture tube screen during all movements of the cathode ray beam. The video signal, after being digitized by means of a clock signal, is written into a random-access memory and is read therefrom in such a way that the individual pixels occupy the correct positions on the screen. This is done under control of a memory controller. The digital signals of the memory are applied to a tube-error-compensating stage and to the picture tube via digital-to-analog converters. This arrangement eliminates the rigid dependence on sawtooth deflection signals and permits the waveforms of the deflection signals to be freely selected according to requirements.

REFERENCES:
patent: 4047204 (1977-09-01), Gold
patent: 4130834 (1978-12-01), Mender et al.
patent: 4386349 (1983-05-01), Granberg et al.
patent: 4573080 (1986-02-01), Maze
patent: 4689526 (1987-08-01), Schweer
patent: 4695772 (1987-09-01), Lau et al.
Electronic Engineering 56 (1984) May, No. 689, London, G. Britain, pp. 77-80, "Deflection Processor Eliminating TV Hold Controls".
IEEE Transaction on Consumer Electronics, CE-31 (1985) Aug., No. 3, New York, pp. 255-261, "Symmetric Line Deflection for Color TV Receivers with Enhanced Picture Quality", Uwe E. Kraus.

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