Image scanning apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMASAHIRO FUNAKOSHI, DAISUKE SUGA
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Abstract
The present invention provides an image reading apparatus comprising a transparent plate, a convey means for conveying an original onto the transparent plate, a light source for illuminating the original, a light receiving element for reading an image of the original illuminated by the light source through the transparent plate, the light receiving element being shifted in a first mode in which the original stopped on the transparent plate is read and being kept stationary in a second mode in which the original being shifted by the convey means is read, and a control means for controlling a light amount of the light source in accordance with the first mode or the second mode.
Claims3
An image reading apparatus comprising:
- a transparent plate;
- a convey means for conveying an original onto said transparent plate;
- a light source for illuminating the original;
- a light receiving element for reading an image of the original illuminated by said light source through said transparent plate, said light receiving element is shifting in a first mode in which the original stopped on said transparent plate is read, and being kept stationary in a second mode in which the original is being shifted by said convey means is read;
- and
- a control means for controlling a light amount of said light source in accordance with said first mode or said second mode of said light receiving.
An image reading apparatus comprising:
- a transparent plate;
- a convey means for conveying an original onto said transparent plate;
- a light source for illuminating the original;
- a light receiving element for reading an image of the original illuminated by said light source through said transparent plate, said light receiving element is shifting in a first mode in which the original stopped on said transparent plate is read, and being kept stationary in a second mode in which the original is being shifted by said convey means is read;
- and
- a conversion means for determining image density in accordance with an output from said light receiving element, said conversion means including a first conversion table for said first mode and a second conversion table for said second mode.
Dependencies are inferred from the claim text.