Television pick-up device suitable for a discontinuous recording

Details Television pick-up device suitable for a discontinuous recording Television pick-up device suitable for a discontinuous recording

1978-12-22

1980-11-11

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358111, 358217, H04N 534, H04N 532

Patent

active

042336333

ABSTRACT:
A television pick-up device suitable for a discontinuous recording of information during continuous operation, such as, for example, in X-ray television. When information recording is interrupted at a continuing field scanning of a target plate in the pick-up tube, the cathode thereof is supplied from a supply circuit with a higher voltage than during the field scanning during information recording. As a result thereof a negative charging of the free surface of the target plate by the more rapid electrons in the electron beam is prevented, so that at the next recording of information the picture quality on display is not poorer due to signal clipping.

REFERENCES:
patent: 3602641 (1971-08-01), Heise

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