Method and apparatus for power feedback LED voltage control
US12177951B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2023 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Jun 15, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED system includes an LED array, a plurality of driver circuits, a power supply, a bus and a feedback circuit. Each of the plurality of driver circuits is connected to and driving one of a plurality of LED subarrays in the LED array. Each of the plurality of driver circuits includes a comparator circuit, a local voltage register, and a global voltage register. The comparator circuit determines, as a local minimum voltage, a lowest voltage in the corresponding LED subarray. The global minimum voltage is determined by comparing all the local minimum voltages. The feedback circuit provides the power supply with a feedback signal reflecting the global minimum voltage and causes the power supply to adjust the voltage output to the LED array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.