Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Discharge control discharge device load controlled by the...
Patent
1990-03-26
1991-05-28
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
With radiant energy sensitive control means
Discharge control discharge device load controlled by the...
315158, 315159, 315360, 315362, 250214AL, H05B 3702
Patent
active
050197479
ABSTRACT:
An illumination control apparatus includes a control slave unit, a master unit, a supervisory slave unit, and a photosensor slave unit. The supervisory slave unit has an operation switch, and outputs a first signal representing an operation change of the operation switch and the supervisory slave unit. The photosensor slave unit outputs a second signal representing a change of a level of an illuminance detected by a photosensor and the photosensor slave unit. The control slave unit controls at least one illumination load. In addition, the master unit controls the control slave unit assigned in a memory in response to the first signal from the supervisory slave unit and the second signal from the photosensor slave unit. When the master unit receives the first signal representing the supervisory slave unit, the illumination load is inverted. When the master unit receives the second signal representing the photosensor slave unit, and the illuminance is higher than a preset level, the illumination load is turned off. Only when the illuminance is lower than the preset level and the operation switch of the supervisory slave unit is ON, the illuminination load is turned on.
REFERENCES:
patent: 4151515 (1979-04-01), Pease et al.
patent: 4237377 (1980-12-01), Sansum
patent: 4362970 (1982-12-01), Grady
patent: 4500814 (1985-02-01), Blake
patent: 4593234 (1986-06-01), Yang
patent: 4856011 (1989-08-01), Shimada et al.
patent: 4937443 (1990-06-01), Smoot
patent: 4937702 (1990-06-01), Kurihara
patent: 4973835 (1990-11-01), Kurosu et al.
Morita Masayuki
Yamazaki Kyoji
Dinh Son
LaRoche Eugene R.
Toshiba Lighting & Technology Corporation
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