Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2007-10-09
2007-10-09
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S370080, C348S294000
Reexamination Certificate
active
10520268
ABSTRACT:
A sensor substrate (20) which includes phototransistors (7), each having a photosensitive semiconductor layer, and auxiliary capacitances (17) connected to the drain electrodes D of the corresponding phototransistors (7), and detecting ICs (25) for detecting a photoelectric conversion amount of the sensor substrate (20), which is connected to a source electrode S of the phototransistor (7), are provided. In the auxiliary capacitance (17), a predetermined amount of charge is stored, and also stored are the charge as generated by an emission of a light beam onto a photosensitive semiconductor layer in the non-conductive state of the phototransistor (7). Each detecting IC (25) detects a photoelectric conversion amount of the sensor substrate (20) based on the amount of charge remaining in the auxiliary capacitance (17).
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Nixon & Vanderhye P.C.
Pyo Kevin
Sharp Kabushiki Kaisha
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