Focus block for a three-tube color video projector

Details Focus block for a three-tube color video projector Focus block for a three-tube color video projector

H - Electricity

04

N

355/8

H04N 9/31 (2006.01)

Patent

CA 1280832

ABSTRACT OF THE DISCLOSURE A focus block for a 3-tube color video projector which has a focus block section for the red color, a focus block section for the green color, and a focus block section for the blue color and each has a focus adjusting circuit and a brightness adjusting circuit which are connected in series the intermediate connecting points between each focus adjusting circuit and each brightness adjusting circuit of the focus block sections are connected together.

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