Facsimile and static presentation processing – Natural color facsimile – Scanning
Patent
1995-02-21
1997-04-29
Vu, Kim
Facsimile and static presentation processing
Natural color facsimile
Scanning
358509, 358475, H04N 104
Patent
active
056254709
ABSTRACT:
A color image scanner and color image scanning method that generates three different colors independently using multiple LEDs and controls the exposure time of a charge coupled device (CCD) and the light emitting time of the LEDs in order to maintain suitable balance and levels for the colors which are generated. A primary timer sets the operation time of the CCD and a secondary timer sets the ON time for each LED. In addition, an LED drive circuit driving the LEDs has two constant current circuits to more evenly read the images of the document to be scanned.
REFERENCES:
patent: 4458264 (1984-03-01), Tamura
patent: 4658303 (1987-04-01), Nagano
patent: 4809061 (1989-02-01), Suzuki
patent: 4926252 (1990-05-01), Nagano
patent: 4939584 (1990-07-01), Sakakibara et al.
patent: 5019897 (1991-05-01), Shirata et al.
patent: 5025204 (1991-06-01), Su
patent: 5115304 (1992-05-01), Yoshikawa et al.
patent: 5138310 (1992-08-01), Hirane et al.
patent: 5251021 (1993-10-01), Parulski et al.
patent: 5268752 (1993-12-01), Fukada et al.
patent: 5450215 (1995-09-01), Iwama
EPC Search Report dated Apr. 25, 1994.
Ochiai Toru
Tsuchihashi Hidehisa
Ueta Souichi
Nikon Corporation
Vu Kim
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