Controlled lighting device

Details Controlled lighting device Controlled lighting device

1978-12-19

1980-10-07

La Roche, Eugene R.

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

Load device irradiating the radiant energy responsive device

250205, 315153, 355 68, 315156, H05B 3702, G03B 2772

Patent

active

042271193

ABSTRACT:
A lighting device in which an amount of light emitted by a lamp is detected by a light receiving element for controlling the input voltage of the lamp commensurate with the detected amount of light. By utilizing a pre-illumination system in conjunction with the lighting device, it is possible to improve the sensitivity characteristics of the light receiving element as the lamp is being charged up to a desired level of illuminescence and to prevent the input of an excessive voltage to the lamp.

REFERENCES:
patent: 3483428 (1969-12-01), LaPlante
patent: 3742295 (1973-06-01), Irie
patent: 3952242 (1976-04-01), Okai
patent: 4024428 (1977-05-01), Bachur et al.

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