Adaptive holding current control for LED dimmer
US9288864B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2013 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | Feb 27, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/3575
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A TRIAC dimmer controller for an LED lamp dynamically adjusts the amount of additional current supplied to the TRIAC dimmer based on the TRIAC dimmer operating mode. A TRIAC dimmer current controller continually senses the TRIAC dimmer current loading and determines a TRIAC dimmer operating mode based on the detected current. The TRIAC dimmer controller compares the detected current with a threshold current value called a TRIAC holding current, and adjusts the amount of bleeder current based on the difference between the detected current and the threshold current value. By continually sensing the TRIAC dimmer current loading, the LED controller regulates the amount of bleeder current supplied to the TRIAC dimmer using a single sink current path to satisfy the TRIAC dimmer current demands of multiple TRIAC dimmer operating modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.