Image-tone control circuit and gradient adjusting circuit...

Details Image-tone control circuit and gradient adjusting circuit... Image-tone control circuit and gradient adjusting circuit...

H - Electricity

04

N

H04N 9/64 (2006.01) H04N 5/57 (2006.01) H04N 9/68 (2006.01)

Patent

CA 2085694

A tone control circuit for luminance signals is disclosed. An adjusting current is used to add to or subtract from input signals with a gain control. Output signals are thus controlled to have a predetermined gradient based on an arbitrary output setting voltage against the input signals, and an input-output characteristic represented by an arbitrary line graph is obtained with plural gradient adjusting circuits.

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