Unified 0-10V and DALI dimming interface circuit

Details Unified 0-10V and DALI dimming interface circuit Unified 0-10V and DALI dimming interface circuit

2008-10-28

2011-12-06

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S307000

Reexamination Certificate

active

08072164

ABSTRACT:
Systems and methods are disclosed that facilitate switching a lamp ballast between DALI and analog control states as a function of control state information stored prior to the ballast being powered of and control information received by an interface circuit for the ballast circuit. A depolarization circuit is coupled to the interface circuit and ensures consistent polarity across a rectifier circuit regardless of the polarity of two control wires coupled to a miswiring protection circuit in the interface circuit. In this manner, a single interface circuit provides dual 0-10V analog and DALI control for dimming a lighting device regardless of whether a wall-mounted controller coupled to the interface circuit is an analog or a DALI type controller, thereby mitigating a need to switch out a ballast circuit coupled to the lighting device when changing between DALI and analog type controllers.

REFERENCES:
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PCT/US2009/057793, Search Report and Written Opinion, Jul. 14, 2010.

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