Color picture display apparatus

Details Color picture display apparatus Color picture display apparatus

H - Electricity

04

N

H04N 5/16 (2006.01) H04N 9/64 (2006.01) H04N 9/73 (2006.01)

Patent

CA 2099832

A color picture display apparatus is provided having a driving circuit for a display device so that a low light adjustment is not influenced by a high light adjustment during white balance adjustment. Horizontal blanking period is blanked by a transistor and a clamping potential of a low light level for white balance adjustment is added to the above blanked signal. The signal, to which a clamping potential was added, is gain- adjusted and clamped by a capacitor and a transistor. Next, the clamped portion is blanked at a transistor and the blanked signal is supplied to a CRT through a driving stage. Low light adjustment is done by adjusting clamping potential with a potentiometer and high light adjustment is done by adjusting gain with another potentiometer.

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