Image scanning device
AssigneeSharp Kabushiki Kaisha
InventorsTomohiko OKADA, Takao Horiuchi, Yoshitaka Okahashi, Takeshi Murakami, Yukihito Nishio
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Abstract
An image scanning device includes a CCD pair provided with two rows of photodiode arrays for scanning an image on a paper, a motor drive circuit for causing the CCD pair to sub-scan the image on the paper, and an adder for superimposedly combining two outputs of the CCD pair with a predetermined time lag therebetween. A control unit controls the adder to add the two outputs of the CCD pair without the time lag when received an instruction of a low resolution that corresponds to ½ of a high resolution by a resolution switch and thereby doubles a speed of the sub-scan by the motor drive circuit.
Claims19
An image scanning device comprising:
- a plurality of photoelectric converters coplanarly arranged in parallel with each other, each of the photoelectric converters having photoelectric conversion elements that are linearly arranged for scanning an image on an original;
- a relative movement control part which controls relative movement between the photoelectric conversion elements and the original in the parallely-arranged direction of the plurality of photoelectric converters;
- a combine unit which superimposes conversion results of the plurality of photoelectric converters with a predetermined time lag therebetween;
- and
- a receive unit which receives a predetermined instruction;
- wherein the combine unit superimposes the conversion results of the plurality of photoelectric converters without the time lag when the receive unit receives the predetermined instruction.
The image scanning device comprising:
- a plurality of photoelectric converters coplanarly arranged in parallel with each other, each of the photoelectric converters having photoelectric conversion elements that are linearly arranged for scanning an image on an original;
- a relative movement control means for controlling relatively movement between the photoelectric conversion elements and the original in the parallely-arranged direction of the plurality of photoelectric converters;
- a combine means for superimposing conversion results of the plurality of photoelectric converters with a predetermined time lag therebetween;
- and
- a receive means for receiving a predetermined instruction;
- wherein the combine means superimposes the conversion results of the plurality of photoelectric converters without a time lag, respectively, when the receive means receives the predetermined instruction.
Dependencies are inferred from the claim text.