Controlling energy efficiency in LED drive circuits
US12376208B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2023 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Oct 5, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/395
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This application is directed to controlling the illumination efficiency of a light emitting diode (LED) operation system, which includes an LED module and a current source. A power supply is configured to provide a configurable drive voltage. The LED module is coupled to the power supply interface and configured to be driven by the configurable drive voltage. The current source is (i) coupled to the power supply interface via the LED module and (ii) configured to stabilize a drive current of the LED module dynamically at a target drive current and hold an illumination efficiency of an LED operation system above a target efficiency level. In some embodiments, the current source includes a drive transistor coupled in series with the LED module. The current source is configured to hold the illumination efficiency of the LED operation system by controlling the drive transistor to operate in a linear region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.