Light source switching type color image scanner

Details Light source switching type color image scanner Light source switching type color image scanner

1992-10-14

1995-03-14

Mancuso, Joseph

Television

Camera, system and detail

With single image scanning device supplying plural color...

348314, H04N 907

Patent

active

053980611

ABSTRACT:
The present invention is directed to a light source switching type color image scanner in which a color signal can be read out at high speed by reducing a read-out time. A red light source (3), a green light source (4) and a blue light source (5) which can be selectively switched are disposed under an original document holder (1) on which an original document (2) is held. Further, there are disposed a mirror (7) and a lens (8) which are used to focus a reflected image of the original document (2) onto a CCD linear image sensor (6). The CCD linear image sensor (6) includes a shutter gate (12) and a shutter drain (13) which are used to reset signal charges of remaining lights from the respective light sources (3), (4) and (5). The reset of a signal charge begins before a next color light source is energized.

REFERENCES:
patent: 4242599 (1980-12-01), Suzuki
patent: 4255760 (1981-03-01), Zeitzoff et al.
patent: 4658303 (1987-04-01), Nagano
patent: 4689808 (1987-08-01), Moorman et al.
patent: 4731661 (1988-03-01), Nagano
patent: 5105264 (1992-04-01), Erhardt
patent: 5166811 (1992-11-01), Nagano

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