Automatic white balance adjusting device

Details Automatic white balance adjusting device Automatic white balance adjusting device

1995-11-21

1997-07-01

Hsia, Sherrie

Television

Camera, system and detail

Combined image signal generator and general image signal...

348226, 348655, H04N 973

Patent

active

056443587

ABSTRACT:
An automatic white balance adjusting device adjusts the white balance of a white object which is indoors under the influence of bright sunlight, or a white object which is indoors under the influence of dull sunlight light and a fluorescent lamp. The device includes a weighting circuit for a fluorescent lamp block, and a weighting circuit for a sunlight-and-tungsten-lamp block. The former weights an average of the fluorescent lamp block, while the latter weights an average of the sunlight-and-tungsten-lamp block. The weighted averages are used to generate a white balancing signal, which will be used for white balancing a white object.

REFERENCES:
patent: 4584598 (1986-04-01), Kutaragi
patent: 4736241 (1988-04-01), Murakami
patent: 4989093 (1991-01-01), Kaneko
patent: 5010394 (1991-04-01), Murao

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