IMAGE SENSING APPARATUS FOR FINGERPRINT IDENTIFICATION AND RELATED DECODER CIRCUIT
First Claim
1. An image sensing apparatus, comprising:
- a substrate, having a first side;
a light guide plate, having a light exit surface and a light entry surface, wherein the light exit surface faces the first side of the substrate;
a plurality of photosensors, disposed on the first side of the substrate; and
a light source, disposed near the light entry surface of the light guide plate, wherein light generated from the light source enters the light guide plate through the light entry surface.
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Accused Products
Abstract
An image sensing apparatus includes a substrate, a light guide plate, a plurality of photosensors and a light source. The substrate has a first side. The light guide plate has a light exit surface and a light entry surface, wherein the light exit surface faces the first side of the substrate. The photosensors are disposed on the first side of the substrate. The light source is disposed near the light entry surface of the light guide plate, wherein light generated from the light source enters the light guide plate through the light entry surface. After entering the light guide plate, the light generated from the light source is incident to the substrate through the light exit surface of the light guide plate, or travels in the light guide plate by total internal reflection.
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Citations
37 Claims
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1. An image sensing apparatus, comprising:
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a substrate, having a first side; a light guide plate, having a light exit surface and a light entry surface, wherein the light exit surface faces the first side of the substrate; a plurality of photosensors, disposed on the first side of the substrate; and a light source, disposed near the light entry surface of the light guide plate, wherein light generated from the light source enters the light guide plate through the light entry surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A decoder circuit of an image sensing apparatus, the image sensing apparatus comprising a photosensor array and a processing circuit;
- the photosensor array having a plurality of rows, a plurality of row control lines, a plurality of columns and a plurality of column data lines;
the processing circuit having at least one input terminal and arranged for processing a plurality of sensing signals of the column data lines;
the decoder circuit comprising;a control circuit, for generating at least one set of column selection signals, wherein each set of column selection signals comprises a plurality of column selection signals; and a column decoder circuit, coupled to the control circuit, the processing circuit and the photosensor array, wherein the column decoder circuit couples the column data lines to the at least one input terminal according to the at least one set of column selection signals, and comprises; at least one switch stage, controlled by the at least one set of column selection signals respectively, wherein the at least one switch stage has a plurality of input nodes and at least one output node, and couples the input nodes to the at least one output node according to the at least one set of column selection signals. - View Dependent Claims (29, 30, 31, 32)
- the photosensor array having a plurality of rows, a plurality of row control lines, a plurality of columns and a plurality of column data lines;
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33. A decoder circuit of an image sensing apparatus, the image sensing apparatus comprising a photosensor array;
- the photosensor array having a plurality of rows, a plurality of row control lines, a plurality of columns and a plurality of column data lines; and
the decoder circuit comprising;a control circuit, for generating a plurality of row control signals and at least one set of row selection signals, wherein the row control lines comprises a plurality of groups of row control lines;
the row control signals are coupled to the groups of row control lines, respectively, and each set of row selection signals comprises a plurality of row selection signals; anda row decoder circuit, coupled to the control circuit and the photosensor array, the row decoder circuit comprising; a plurality of switch circuits, disposed respectively in correspondence with the columns, wherein each switch circuit couples a plurality of photosensors of a column corresponding to the switch circuit to a column data line corresponding to the column according to the at least one set of row selection signals, and comprises; at least one switch stage, controlled by the at least one set of row selection signals respectively, wherein the at least one switch stage has a plurality of input nodes and at least one output node, and couples the input nodes to the at least one output node according to the at least one set of row selection signals. - View Dependent Claims (34, 35, 36, 37)
- the photosensor array having a plurality of rows, a plurality of row control lines, a plurality of columns and a plurality of column data lines; and
Specification