Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1986-09-05
1989-02-14
Buczinski, Stephen C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250226, G01J 350
Patent
active
048048330
ABSTRACT:
A method for sensing the color of incident light with a color sensing device, the color sensing device being a photoelectric device comprising an n-type or p-type amorphous silicon layer, being characterized in the following steps; measuring a first photocurrent of the photoelectric device generated by incident light when an electrical voltage having a predetermined parity is applied thereto; measuring a second photocurrent of the photoelectric device generated by the same incident light when another electrical voltage having a parity opposite to the predetermined parity is applied thereto, calculating the ratio of the first photocurrent to the second photocurrent; and identifying the color of incident light according to the ratio obtained.
A color sensing device, comprising: two elements including an n-type or p-type amorphous silicon layer; an electric power source for applying a positive voltage and a negative voltage to the two elements at the same time, respectively; and a divider means for calculating a ratio of the two photocurrents which flows in each elements.
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Proceedings of the 43rd Meeting of the Japanese Society of Applied Physics, p. 318.
Iino Shuji
Kitano Hirohisa
Matsubara Ken
Buczinski Stephen C.
Hellner Mark
Minolta Camera Kabushiki Kaisha
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