Multi-zone closed loop daylight harvesting having at least...

Details Multi-zone closed loop daylight harvesting having at least... Multi-zone closed loop daylight harvesting having at least...

2006-05-05

2009-06-09

Vu, David Hung (Department: 2821)

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

C315S157000, C315S158000, C315S159000

Reexamination Certificate

active

07545101

ABSTRACT:
A multi-zone daylight harvesting method and apparatus having a closed loop system utilizing a single light sensor is disclosed herein. This light control system includes an ambient light sensor connected to a detection circuit for detecting the amount of ambient light within a given zone and converting the light signal to an digital one. A control device couples to receive a predetermined rate of change for each respective zone from a storage unit along with the converted digital signal. The control device connects each zone of a plurality of electrical loads to control the power supplied to the electrical load at the predetermined corresponding rate of change and responsive to the amount of ambient light detected.

REFERENCES:
patent: 5668446 (1997-09-01), Baker
patent: 7019276 (2006-03-01), Cloutier et al.
patent: 2006/0076908 (2006-04-01), Morgan et al.

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