Constant temperature LED driver circuit
US8299718B2 · kind B2 · utility
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Key dates
| Filing date | Feb 17, 2010 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Nov 18, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/58
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A constant temperature LED driver circuit for controlling the rate of lumen depreciation and therefore useful lifetime of an LED array by keeping the LEDs at a fixed temperature. A temperature sensing means, which measures the temperature of the LEDs, is coupled to a variable power source that drives the LED array. The current provided to the LED array is adjusted in response to the temperature sensing means to ensure that the LEDs remain at a constant temperature regardless of changes in ambient temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.