Beam index color television receiver apparatus

Details Beam index color television receiver apparatus Beam index color television receiver apparatus

1979-11-27

1981-04-07

Safourek, Benedict V.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 69, H04N 924

Patent

active

042610109

ABSTRACT:
In a beam index color television receiver of the type having a cathode ray tube which is provided with beam-excitable color elements disposed on a display screen of the cathode ray tube and index elements which are scanned by an electron beam as the beam scans the display screen, an apparatus for controlling the beam includes an index signal generator for generating a periodic index signal as the index elements are scanned by the beam, color gates which sequentially gate respective color control signals individually to modulate the electron beam as the beam scans the color elements, a gating signal circuit which generates sequential gating signals at a frequency synchronized with the frequency of the periodic index signal and which supplies the gating signals in sequence to the color gates to control the latter so as to gate the respective color control signals, and a phase-controlling circuit for controlling the phase of the gate pulse signals in response to the highest-level one of the color control signals.

REFERENCES:
patent: 2989583 (1961-06-01), Thompson
patent: 3258527 (1966-06-01), Thompson
patent: 3688204 (1972-08-01), Van Den Avoort
patent: 3748375 (1973-07-01), Sunstein

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