Optoelectronic circuit with low-flicker light-emitting diodes
US9854632B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2015 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Jul 8, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H29/142
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An optoelectronic circuit for receiving a variable voltage having alternating increasing and decreasing phases. The optoelectronic circuit includes an alternating arrangement of resistive elements and light-emitting diode sets mounted in series. Each set contains two terminals. Each resistive element is inserted between two consecutive sets. The optoelectronic circuit includes, for each set among a plurality of said sets, a depletion mode metal oxide semiconductor field effect transistor, the drain and the source of which are coupled with the terminals of said set and the gate of which is coupled with one of the terminals of the next set. An additional resistive element is, for at least some of the transistors, coupled between the drain or the source of the transistor and one of the terminals of the set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.