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US 6,643,038 B1Granted
Contact type color image sensor
AssigneeSeiko Instruments Inc.
InventorsYukito Kawahara, Satoshi Machida, Masahiro Yokomichi
Life of this patent
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Abstract
A low-priced contact type color image sensor formed without the need to provide color filters on a linear image sensor. The color filters are formed on a surface of a document side of a transparent protective glass in direct contact with a document for flattening the light irradiation surface, such that the pitch thereof is equal to that of light receiving elements of a linear image sensor.
Claims17
A contact type color image sensor comprising:
- a transparent substrate with two opposing parallel surfaces, a first one of which is brought into direct contact with a document to be sensed;
- a plurality of different color filters disposed in the transparent substrate such that upper exposed surfaces thereof are flush with the first surface of the transparent substrate to form a planar surface that is brought into direct contact with the document to be sensed;
- and a linear image sensor for sensing the document.
A color image sensor comprising:
- a housing;
- a transparent support member disposed in the housing for supporting a sheet containing an image to be detected and having two opposing parallel surfaces, a first one of which is brought into direct contact with the sheet having the image to be detected;
- a linear image sensor disposed in the housing for detecting the image;
- a plurality of color filters of different colors provided in the transparent support member such that upper exposed surfaces thereof are flush with the first surface of the transparent support member to form a planar surface that is brought into direct contact with the sheet;
- and a lighting device for projecting light onto the image such that light reflected by the image is projected through the color filters and received by the light receiving elements to perform color separation.
2 more elements
Dependencies are inferred from the claim text.