TV receiver raster expansion system

Details TV receiver raster expansion system TV receiver raster expansion system

1975-01-27

1977-06-07

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358180, 315379, H04N 544, H01J 2970

Patent

active

040287262

ABSTRACT:
A system for enlarging the image on the screen of a cathode ray picture tube by increasing the deflection of the electron beam. Accompanying deterioration in contrast and brightness is reduced by blanking the overscan portions of the raster. In addition, contrast and color level controls are automatically adjusted to match the expanded image to the normal image. The blanking for both the horizontal and vertical deflection is handled by a common circuit.

REFERENCES:
patent: 2310671 (1943-02-01), Batchelor
patent: 2368449 (1945-01-01), Cook
patent: 2386728 (1945-10-01), Theisen
patent: 2510670 (1950-06-01), Trott
patent: 2864969 (1958-12-01), Shulman
patent: 3335220 (1967-08-01), Wilcox
patent: 3740472 (1973-06-01), Fitzgerald

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