Projection-type video display apparatus capable of correcting an

Details Projection-type video display apparatus capable of correcting an Projection-type video display apparatus capable of correcting an

1996-03-04

1996-12-10

Lee, Micheal H.

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

348687, 348745, 315383, H04N 521, H04N 574

Patent

active

055835783

ABSTRACT:
The gain of a variable gain amplifier for amplifying a video signal is changed in accordance with a brightness correction control signal that is output from a waveform ROM. The shape of the output signal of the waveform ROM is changed in accordance with a signal indicating the scanning position which signal is deformed in accordance with an external signal indicating a deviation of a hot spot.

REFERENCES:
patent: 3976991 (1976-08-01), Hickin et al.
patent: 4631576 (1986-12-01), St. John
patent: 4670778 (1987-06-01), Miyakawa
patent: 4868668 (1989-09-01), Tavernetti

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