CCD sensor output circuit of image reading apparatus

Details CCD sensor output circuit of image reading apparatus CCD sensor output circuit of image reading apparatus

1985-04-11

1987-03-31

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358282, 358280, 250214, H04N 1010

Patent

active

046547231

ABSTRACT:
A CCD sensor output circuit of an image reading apparatus adapted to output a stable reading signal from a CCD sensor even if the light source changes in temperature due to heating. One portion of a region read by the CCD sensor serves as a reference region. In accordance with the output of the CCD sensor corresponding to the reference region, after the light source has been turned on in response to a lighting control signal, the reflected lights from the images are accumulated in the CCD sensor at a first timing after the light source has been made stable, and the output of the CCD sensor is transferred at a second timing after the firt timing but before the output of the next lighting control signal, thus providing the CCD sensor output after the light source has been made stable.

REFERENCES:
patent: 4408231 (1983-10-01), Bushaw et al.
A. J. Dattilo et al. "Variable Intensity Illumination Scanner Calibration System" IBM Technical Discl. Bul., vol. 21, No. 9, 2-79, p. 3546.
L. W. Bassetti et al. "Illumination Regulation For Array Scanner" IBM Technical Discl. Bul., vol. 22, No. 8A, Jan. 1980, p. 3131.

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