Brightness and automatic kinescope bias control in a video...

Details Brightness and automatic kinescope bias control in a video... Brightness and automatic kinescope bias control in a video...

H - Electricity

04

N

375/46, 350/79,

H04N 5/57 (2006.01) H04N 5/16 (2006.01) H04N 9/72 (2006.01)

Patent

CA 1278119

Abstract of the Disclosure A wideband video signal processor includes a kinescope driver stage which is AC coupled to the kinescope, and an automatic kinescope bias (AKB) control system. During AKB operating intervals, the kinescope is energized so as to produce a cathode output pulse with a magnitude related to the level of black current conducted by the kinescope. Brightness control is achieved by coupling a brightness control voltage to a signal path which conveys the cathode output pulse to AKB signal processing circuits.

518271

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