Image sensor with light receiving elements of differing areas and image reader both having semiconductor device
First Claim
Patent Images
1. An image sensor apparatus comprising:
- a substrate; and
a plurality of light receiving element groups formed on said substrate, said plurality of light receiving element groups differing in light receiving area from one another.
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Abstract
An insulating substrate and a scanning circuit region are provided on a semiconductor device. The scanning circuit region is provided with a switching transistor for outputting charge formed on the insulating substrate and a clock wiring determining switching timing of the switching transistor. A shield conductor member is provided below the scanning circuit region.
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Citations
11 Claims
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1. An image sensor apparatus comprising:
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a substrate; and
a plurality of light receiving element groups formed on said substrate, said plurality of light receiving element groups differing in light receiving area from one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
a drive output circuit provided with shift registers sequentially selecting a light receiving element to be driven out of said light receiving elements at predetermined timing;
a light receiving element array selection control circuit selecting a predetermined light receiving element array from said plurality of light receiving element arrays;
a decoder circuit outputting a light receiving element selection signal for selecting said light receiving element based on output signals of said drive output circuit and said light receiving element array selection control circuit; and
pixel switches selectively driving said light receiving elements based on an output signal of said decoder circuit.
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6. The image sensor apparatus according to claim 5, wherein
M types of said light receiving arrays exist; -
said drive output circuit outputs signals of stages of said shift registers, respectively;
said light receiving element array selection control circuit has at least N control lines, where N≧
M; and
said decoder circuit has N NAND circuits or NOR circuits, said output signal of said drive output circuit being inputted to one input terminals of said NAND circuits or said NOR circuits and said N control lines being connected to the other input terminals of mutually different said NAND circuits or said NOR circuits.
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7. The image sensor apparatus according to claim 1, which further comprising:
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a drive output circuit provided with shift registers sequentially selecting a light receiving element to be driven out of said light receiving elements at predetermined timing;
a light receiving element array selection control circuit selecting a predetermined light receiving element array from said plurality of light receiving element arrays; and
pixel switches selectively driving said light receiving elements based on an output signal of said drive output circuit.
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8. The image sensor apparatus according to claim 2, wherein lengths of sides of said plurality of light receiving elements parallel to a sub-scanning direction are equal among said respective light receiving element arrays, and lengths of sides of said plurality of light receiving elements parallel to a main scanning direction differ among said respective light receiving element arrays.
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9. The image sensor apparatus according to claim 8, wherein a shape of each light receiving element forming one light receiving element array is a square and a shape of each light receiving element forming another light receiving element array is a rectangle.
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10. The image sensor apparatus according to claim 9, wherein a length of a longer side of said rectangle is not less than twice as large as a length of a shorter side.
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11. An image reader for relatively moving a manuscript and an image sensor apparatus and reading an image of said manuscript, said image reader comprising:
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an image sensor apparatus according to one of claims 1 to 10;
a control signal generation circuit generating a control signal for controlling an operation of said image sensor in accordance with a resolution selected by a user; and
a driver circuit selectively driving said light receiving elements based on said control signal.
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Specification