Patent · US Active

LED arrangement and LED driving method

US10334669B2 · kind B2 · utility

0Cited by

2References

15Claims

0Family size

Assignee

SIGNIFY HOLDING B.V. · NL

Inventors

Shan Wang · Shanghai, CN
Chun-Sheng Yang · Shanghai, CN
Zhi Quan Chen · Shanghai, CN
Gang Wang · Milpitas, US
Jie Fu · Beijing, CN

Key dates

Filing date	Mar 15, 2018
Grant date	Jun 25, 2019
Priority date	—
Expiry date	Mar 15, 2038

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/30
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A lighting circuit uses a tapped linear driver architecture in which there are at least two LED types; a first LED type with a first forward voltage, and a second LED type with a second forward voltage at least double the first forward voltage. The first segment of the tapped linear driver comprises more LEDs of the first type than the second type and the last segment comprises more LEDs of the second type than the first type. This arrangement enables a reduction in the number of LEDs needed, but without significantly impacting on the efficiency of the circuit.

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