The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2015
Filed:
Mar. 01, 2011
Hongjie Zhang, Jilin, CN;
Ming Zhang, Sichuan, CN;
Chengyu LI, Jilin, CN;
Kun Zhao, Sichuan, CN;
Dongming LI, Sichuan, CN;
LI Zhang, Sichuan, CN;
Hongjie Zhang, Jilin, CN;
Ming Zhang, Sichuan, CN;
Chengyu Li, Jilin, CN;
Kun Zhao, Sichuan, CN;
Dongming Li, Sichuan, CN;
Li Zhang, Sichuan, CN;
Sichuan Sunfor Light Co., Ltd., Sichuan, CN;
Changchun Institute of Applied Chemistry, Chinese Academy of Science, Jilin, CN;
Abstract
An Alternate Current (AC) white Light-Emitting Diode (LED) device is provided, which belongs to the technical field of white LED manufacturing. The problem to be solved by the present invention is to low-costly overcome a series of deficiencies such as the stroboflash of an AC driven LED, and the heat dissipation difficulty caused by an integrated packaging of multiple LEDs. A white LED unit includes an LED chip and a light emitting material that can emit light when being excited by the LED chip. The luminous lifetime of the light emitting material is 1-100 ms. The LED chip only comprises one PN junction. The light emitted by the LED chip is mixed with the light emitted by the light emitting material to form white light. The white LED unit is driven by AC with a frequency not more than 100 Hz. The white LED device of prevent invention uses the single PN junction chip, rather than the prior integrated packaged AC multi-LED chip.