Color killer adjustment device

Details Color killer adjustment device Color killer adjustment device

2006-07-11

2006-07-11

Lee, Michael H. (Department: 2614)

Television

Image signal processing circuitry specific to television

Color killer

C348S644000

Reexamination Certificate

active

07075589

ABSTRACT:
A conventional method to determine an onset point of a color killer function by design of the external circuit requires physical work to change external parts and their component values varying from one model to another. Therefore, an alternative method to adjust the onset point of the color killer function without requiring such work has been sought for. This invention offers a color killer adjustment device, which adjusts the onset point of the color killer function to switch off the color signal in video signals, having a CPU to store and output a control signal to determine the onset point of the color killer function, a color killer control circuit which generates the reference voltage corresponding to the control signal from the CPU and a comparator which compares a signal representing the level of the color burst signal in the color signal with the reference voltage and outputs a signal to disable the color signal in the video signals according to a result of the comparison.

REFERENCES:
patent: 4253108 (1981-02-01), Engel
patent: 4785346 (1988-11-01), Yoshimochi
patent: 5389979 (1995-02-01), Jeong
patent: 54-048435 (1979-04-01), None
patent: 56-54185 (1981-05-01), None

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