Patent · US Active

LED lighting circuit and a lighting device comprising the same

US11425807B2 · kind B2 · utility

0Cited by

3References

10Claims

0Family size

Assignee

SIGNIFY HOLDING B.V. · NL

Inventors

Zhi Quan Chen · Shanghai, CN
John Dai · Shanghai, CN
Liang Shi · San Diego, US
Kelvin Wang · Suzhou, CN

Key dates

Filing date	Sep 3, 2019
Grant date	Aug 23, 2022
Priority date	—
Expiry date	Sep 3, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH05B45/54
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In order to reduce energy loss of a tapped linear driver, it is proposed an LED lighting circuit, comprising an input (Vbus, GND) adapted to receive an input voltage, a plurality of LED segments (LED1, LED2, LED3, LED) connected in series and to the input, a buffer component (C9) connected to an anode and a cathode of a series string of at least two of the plurality of LED segments with respective switches, a current source circuit (B1) in series connection with a parallel connection of the buffer component (C9) and the at least two LED segments, across the input; further comprising a further buffer component (C5) across the current source circuit (B1), wherein said buffer component (C9) and the further buffer component (C5) is in series connection.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.