US 9,854,632 B2 · Optoelectronic circuit with low-flicker light-emitting diodes

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.

Claims20

Dependent claims

An optoelectronic circuit intended to receive a variable voltage containing an alternation of increase and decrease phases, the optoelectronic circuit comprising:

an alternation of resistive elements and of sets of series-assembled light-emitting diodes, each set comprising two terminals, each resistive element being interposed between two successive sets, the resistive elements and the sets of series-assembled light-emitting diodes being mounted in series;
for each set from among a plurality of said sets, a depletion metal-oxide gate field effect transistor having its drain and its source coupled to the terminals of said set and having its gate coupled to one of the terminals of the next set, an additional resistive element being, for at least some of the transistors, coupled between the drain or the source of the transistor and one of the terminals of said set.

Dependencies are inferred from the claim text.

Optoelectronic circuit with low-flicker light-emitting diodes

Life of this patent

Optoelectronic circuit with low-flicker light-emitting diodes

Life of this patent

Abstract

Claims20