Video display system with stabilized background level

Details Video display system with stabilized background level Video display system with stabilized background level

1985-10-29

1987-04-21

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 74, 358172, 358243, H04N 518, H04N 557

Patent

active

046600833

ABSTRACT:
A video monitor includes a kinescope driver amplifier AC coupled to a kinescope via a capacitor which is also associated with a video signal clamp. A control signal related to the magnitude of video signals coupled to the kinescope modifies the kinescope bias so as to increase kinescope current conduction and image brightness, to counteract the tendency of a displayed image to exhibit reduced brightness as the amplitude of the video signal increases.

REFERENCES:
patent: 2828357 (1958-03-01), Fyler et al.
patent: 4044375 (1977-08-01), Norman
patent: 4442458 (1984-04-01), Barter
patent: 4599651 (1986-07-01), Rodda

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