Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1983-11-18
1986-05-13
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250551, G01J 132
Patent
active
045888833
ABSTRACT:
An array of light emitting diodes are fabricated in the substrate of a monolithic device. Each diode, when forward biased, produces output light which is emitted from the device and subsurface light which is transmitted through the substrate. A single detector is fabricated in the substrate and detects subsurface light from any forward biased light emitting diode of such array. In response to such subsurface light, the detector produces a signal which is representative of the intensity of output light emitted from the device by such forward biased light emitting diode.
REFERENCES:
patent: 3480783 (1969-11-01), Mankarious
patent: 4074143 (1978-02-01), Rokos
patent: 4074320 (1978-02-01), Kapes, Jr.
patent: 4097732 (1978-06-01), Krause et al.
patent: 4284884 (1981-08-01), Dyment et al.
patent: 4297653 (1981-10-01), Scifres et al.
patent: 4521681 (1985-06-01), Inaba et al.
Eastman Kodak Company
Gatto James
Nelms David C.
Owens Raymond L.
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