Patent · US Active

Improving THD for a direct AC LED lighting device

US10624162B2 · kind B2 · utility

0Cited by

1References

15Claims

0Family size

Assignee

DIALOG SEMICONDUCTOR INC. · DE

Inventors

Nan Shi · Newark, US
Haiju Li · Campbell, US

Key dates

Filing date	Mar 21, 2018
Grant date	Apr 14, 2020
Priority date	—
Expiry date	Mar 21, 2038

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B70/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A direct AC LED lighting device is provided with a variable current source and a controller. The controller controls the variable current source to conduct a THD compensation current while an LED string in the direct AC lighting device is not conducting to improve power factor and reduce the THD.

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