Single element optical sensor
First Claim
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1. A single element optical sensor, comprising:
- a light absorbing semiconductor layer, potential barrier region positioned in said light absorbing layer and two electrodes connected to said light absorbing layer.
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Abstract
The single element optical sensor of this invention is a two-terminal element and comprises a light absorbing semiconductor layer, potential barrier materials positioned in said light absorbing layer and two electrodes connected to said light absorbing layer. Positions and chemical compositions of the potential barriers are adjusted according to wavebands of interests. Under different bias conditions photoelectric voltages with separated peaks are generated by the invented optical sensor, whereby color elements of an image may be obtained. Distinguish of light waves of selected wavebands may thus be achieved.
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Citations
43 Claims
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1. A single element optical sensor, comprising:
- a light absorbing semiconductor layer, potential barrier region positioned in said light absorbing layer and two electrodes connected to said light absorbing layer.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An optical sensing device, comprising:
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an optical sensor to detect incident light and to generate photo-generated currents in response to light wave elements in particular wavebands of said incident light;
a variable power source to supply a variable bias to said optical sensor;
a comparator to compare a reference voltage and output of said optical sensor;
a current to voltage converter to convert output current of said optical sensor into voltage; and
a signal processing unit to control output bias of said variable power source and output of said optical sensor;
wherein said optical sensor comprises;
a light absorbing semiconductor layer, potential barrier region positioned in said light absorbing layer and two electrodes connected to said light absorbing layer. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification