LED control circuit with self-adaptive regulation
US9445470B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2014 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | Oct 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED control circuit comprises a driver, a counter, and a controller and is configured to control a plurality of light-emitting units, each of which comprises at least one LED and a switch. The driver receives an alternating-current signal to output a driving signal whereby the light-emitting units are enabled. The counter begins a count from a start number when a voltage value of the driving signal equals a base value. When the count reaches a predetermined number, the controller controls the switch of at least one of the light-emitting units, causing the LED of the light-emitting unit to receive the driving signal. When the LED of the light-emitting unit receives the driving signal, the controller detects whether the light-emitting unit is enabled and adjusts the predetermined number accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.