Index signal enhancement circuit

Details Index signal enhancement circuit Index signal enhancement circuit

1983-02-28

1985-07-02

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 924

Patent

active

045271925

ABSTRACT:
A color display system includes an index CRT and a photo multiplier tube for developing an index signal in response to electron bombardment of regularly spaced phosphor index strips overlying the screen on the tube. Correction means, including time delayed and inverted blue and red video signals, produce opposite polarity signals that are added to the output of the photo multiplier tube to correct the index signal. A pulse generator produces the square wave index signal. The output of the pulse generator is gated between index pulses for noise purposes.

REFERENCES:
patent: 4268857 (1981-05-01), Isono
patent: 4281340 (1981-07-01), Mitamura
patent: 4408223 (1983-10-01), Midland
patent: 4468690 (1984-08-01), Midland

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