Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1997-05-16
1999-09-21
Allen, Stephone
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250214C, 327514, 356218, H01J 4014
Patent
active
059557265
ABSTRACT:
A light sensing apparatus for different control systems includes a photosensitive element which generates a light current depending on light incident thereto. A pre-circuit connected to the photosensitive element is operative for generating separate basic signals in response to the light current generated by the photosensitive element. Processing circuits connected to the pre-circuit are active simultaneously for converting the basic signals generated by the pre-circuit into conversion-resultant signals having different forms respectively. The conversion-resultant signals are outputted to the control systems respectively. At least one of the processing circuits may include an oscillation circuit which oscillates at a frequency depending on related one of the basic signals generated by the pre-circuit.
REFERENCES:
patent: 4306807 (1981-12-01), Sakane et al.
patent: 4745274 (1988-05-01), Muro
patent: 5327210 (1994-07-01), Okui et al.
patent: 5329115 (1994-07-01), Lim
patent: 5434430 (1995-07-01), Stewart
patent: 5585623 (1996-12-01), Ohtomo et al.
patent: 5693934 (1997-12-01), Hohmoto et al.
Horiba Keiji
Sakai Kazunori
Sasaki Akihiro
Suzuki Tomonori
Takagi Nobutomo
Allen Stephone
Denso Corporation
Toyota Jidosha & Kabushiki Kaisha
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