Unified 0-10V and DALI dimming interface circuit
US8072164B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2008 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Aug 25, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/183
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.