White balance regulating device and method thereof

Details White balance regulating device and method thereof White balance regulating device and method thereof

2006-07-04

2006-07-04

Hsia, Sherrie (Department: 2614)

Television

Image signal processing circuitry specific to television

Color balance or temperature

C348S656000

Reexamination Certificate

active

07071998

ABSTRACT:
Disclosed is a white balance regulating device, including a cut-off value adjusting portion for adjusting and outputting a cut-off value of an analog image signal which is input as a first pattern; an A/D converter for converting the analog image signal, in which the cut-off value is adjusted, into a digital image signal; a detecting portion for detecting a least significant bit of each tristimulus value of the digital image signal; a controlling portion for upwardly regulating a level of a variable register of the cut-off value adjusting portion from a level corresponding to a preset first initial cut-off value until the least significant bit becomes different from the first initial cut-off value and setting the level of the variable register just before the least significant bit becomes different from the first initial cut-off value as a first cut-off value; and a storing portion for storing the first cut-off value.

REFERENCES:
patent: 5400086 (1995-03-01), Sano et al.
patent: 5657098 (1997-08-01), Ando et al.
patent: 6429905 (2002-08-01), Yamamoto

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