Full voltage segmented linear constant-current LED drive circuit in auto switchover mode
US10034338B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2016 |
| Grant date | Jul 24, 2018 |
| Priority date | — |
| Expiry date | Apr 19, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a full voltage segmented linear constant-current LED drive circuit in an auto switchover mode comprising a minimum of two groups of LEDs in series connection in proper sequence and a voltage detection and control circuit used for detection of an input power voltage from a power source, a positive terminal of each group of LEDs is connected to the power source via a change-over switch, a negative terminal of each group of LEDs is grounded via a control switch; wherein, one group of LEDs comprises a minimum of two LED units in series connection in proper sequence, a negative terminal of each LED unit is grounded via a control switch; the change-over switch and control switch are connected to and controlled by the voltage detection and control circuit to change inter-group series parallel connection mode and ON/OFF of different LED units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.