Electric lamp and discharge devices: systems – Current and/or voltage regulation – Pre-selectable regulator systems
Patent
1992-05-01
1993-10-19
Mis, David
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Pre-selectable regulator systems
315151, 315158, 315287, 315360, 315DIG4, H05B 4138, H05B 3702
Patent
active
052549097
ABSTRACT:
A device for modulating and controlling the level of luminosity output by a lighting facility. The modulation may be of average current or voltage. The device modulates electrical power in a cyclical manner for input to the lighting facility, so that the resulting modulation of the luminosity output serves to exercise the eyes of persons exposed thereto. The average luminosity, and the amplitude and period of modulation can be set and adjusted by the user. The rate of modulation is sufficiently slow that the level of change of luminosity is accommodated by human eyes and is imperceptible through the eyes of persons exposed thereto. In one embodiment, an illuminance sensor is provided to read the actual illumination of a lighted object. The values of the illumination so read are fed back in the device to adjust the luminosity of the lighting facility, so that the object is illuminated in the desired cyclical manner.
REFERENCES:
patent: 3534224 (1970-10-01), Skirpan et al.
patent: 4513364 (1985-04-01), Nilssen et al.
patent: 4697122 (1987-09-01), Hoffer
patent: 5008865 (1991-04-01), Shaffer et al.
Li Meng-Feng
Shyu Jia-Ming
Mis David
Norm Pacific Automation Corp.
Rabin Steven M.
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