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

1987-05-11

1988-05-24

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 65, H04N 931

Patent

active

047469730

ABSTRACT:
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.

REFERENCES:
patent: 4051514 (1977-09-01), Suzuki et al.
patent: 4219843 (1980-08-01), Takahashi
patent: 4599641 (1986-07-01), Troiano
patent: 4599651 (1986-07-01), Rodda
patent: 4631576 (1986-12-01), St. John

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