White balance control system

Details White balance control system White balance control system

1992-07-13

1994-03-08

Chin, Tommy P.

Television

Image signal processing circuitry specific to television

Color balance or temperature

348778, H04N 931

Patent

active

052932249

ABSTRACT:
A quality of blue light projected on a screen is detected. A ratio of the detected quantity of the light to a whole quantity is calculated. The calculated ratio is compared with a reference ratio, and a deviation of the calculated ratio from the reference ratio is corrected so as to provide a white balance.

REFERENCES:
patent: 3479448 (1969-11-01), Kollsman
patent: 3877068 (1975-04-01), Kosaka et al.
patent: 4379292 (1983-04-01), Minato
patent: 4631576 (1986-12-01), St. John
patent: 4700218 (1987-10-01), Thomsen
patent: 4706108 (1987-11-01), Kumagai
patent: 4739396 (1988-04-01), Hyatt
patent: 4742387 (1988-05-01), Oshima
patent: 4746970 (1988-05-01), Hosokawa
patent: 4962418 (1990-10-01), Kamaga
patent: 4977446 (1990-12-01), Shiomi
patent: 4999703 (1991-03-01), Henderson

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