Kinescope driver with gamma correction and brightness dependent

Details Kinescope driver with gamma correction and brightness dependent Kinescope driver with gamma correction and brightness dependent

1994-04-28

1995-10-03

Groody, James J.

Television

Image signal processing circuitry specific to television

Gray scale transformation

348687, H04N 5202

Patent

active

054556350

ABSTRACT:
A video input signal is amplified and applied to the cathode of a kinescope via linear kinescope driver amplifier provided with an output impedance sufficiently high to impart gamma correction to images displayed by the kinescope but tending to diminish the bandwidth of the amplified video signal applied to the cathode. A capacitor is included in the driver for restoring the bandwidth of the amplified video signal. For stabilizing the high frequency response (detail) of displayed images the value of the capacitor is varied as a function of the brightness of displayed images.

REFERENCES:
patent: 2921131 (1960-01-01), Bonner et al.
patent: 3633121 (1972-01-01), Bretl
patent: 4096517 (1978-06-01), Hinn
patent: 4126814 (1978-11-01), Marlowe
patent: 4858015 (1989-08-01), Furrey
patent: 5083198 (1992-01-01), Haferl et al.
patent: 5317240 (1994-05-01), Keller

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