Patent · US Active

LED device

US11024779B2 · kind B2 · utility

0Cited by

1References

19Claims

0Family size

Assignee

LEEDARSON LIGHTING CO., LTD. · CN

Inventors

Yanbiao Chen · Xiamen, CN
Liangliang Cao · Xiamen, CN
Huiwu Chen · Fujian, CN
Qiyuan Wang · Xiamen, CN

Key dates

Filing date	Feb 26, 2019
Grant date	Jun 1, 2021
Priority date	—
Expiry date	Aug 11, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH10H20/857
WIPO fieldSemiconductors
WIPO sectorElectrical engineering

Abstract

A LED device includes LED chips mounted on a substrate, a first fluorescent layer, a second fluorescent layer and a package housing. The LED chips emit a blue light. The first fluorescent layer has a first side facing to the LED chips for converting the blue light to a red light. The second fluorescent layer has a first side attached to a second side of the first fluorescent layer for converting the blue light to a red light emitted from a second side of the second fluorescent layer. The package housing holds the substrate and the first fluorescent layer.

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