SEMICONDUCTOR PHOTOSENSOR DEVICE
PROBLEM TO BE SOLVED: To provide a semiconductor photosensor device having the spectrometric sensitivity characteristic near the visual sensitivity, and also to provide an information apparatus comprising the same photo-sensor. SOLUTION: The semiconductor photosensor device comprises a silicon subst...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
07.12.2006
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To provide a semiconductor photosensor device having the spectrometric sensitivity characteristic near the visual sensitivity, and also to provide an information apparatus comprising the same photo-sensor. SOLUTION: The semiconductor photosensor device comprises a silicon substrate, a first photo-diode and a second photo-diode formed on the silicon substrate, a first amplifying circuit for amplifying an optical current from the first photo-diode, a second amplifying circuit having almost the identical amplifying characteristic as the first amplifying circuit formed on the silicon substrate to amplify an optical current from the second photo-diode, an infrared transmitting filter provided on the second photo-diode to relatively attenuates the visible light element among the incident light for the infrared light element, and a subtraction circuit formed on the silicon substrate to output a difference between the output of the first amplifying circuit and the output of the second amplifying circuit. In the semiconductor photosensor device, the first photo-diode and the second photo-diode are arranged on the silicon substrate in the manner that the centers of these photo-diodes are substantially symmetrical. COPYRIGHT: (C)2007,JPO&INPIT |
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Bibliography: | Application Number: JP20050151927 |