Beam index color cathode ray tube

Details Beam index color cathode ray tube Beam index color cathode ray tube

1978-12-15

1980-09-16

Murray, Richard

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 924

Patent

active

042233445

ABSTRACT:
A beam index color cathode ray tube has index stripes spaced apart across a run-in area of the screen which have a pitch substantially equal to the pitch of index stripes in an image area, and a predetermined number of the index stripes in the run-in area are counted as an electron beam scans them to preset color control circuits to a predetermined condition at the commencement of scanning of the image area. A characteristic of the signal resulting from scanning of the index stripes may be used to begin the counting thereof from a specific one of the index stripes in the run-in area other than the first one encountered by the electron beam.

REFERENCES:
patent: 2791626 (1957-05-01), Hergenrother
patent: 2945087 (1960-07-01), Graham et al.
patent: 3041392 (1962-06-01), Keiper, Jr. et al.
patent: 3249688 (1966-05-01), Davidse et al.
patent: 3294899 (1966-12-01), Davidse et al.
patent: 4003082 (1977-01-01), Fumoto

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