LED controller
US10271394B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2017 |
| Grant date | Apr 23, 2019 |
| Priority date | — |
| Expiry date | Dec 29, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/37
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Methods and circuits for controlling one or more LEDs are disclosed. In one embodiment, a light emitting diode (LED) driver for driving one or more serially connected LEDs includes a voltage regulator circuit configured to receive a rectified AC voltage, where the voltage regulator circuit includes a depletion device configured to generate an unregulated voltage using the rectified AC voltage, a band gap voltage reference circuit configured to generate one or more reference voltages using the unregulated voltage, and a current setting circuit configured to control the one or more serially connected LEDs using the one or more reference voltages, where the current setting circuit is connected to a circuit ground through a current setting resistor having a fixed resistance value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.