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:
Jul. 10, 2012
Filed:
Aug. 14, 2008
Applicants:
Shuit Tong Lee, Yuen Long, HK;
Dorothy Duoduo MA, Changsha, CN;
Inventors:
Shuit Tong Lee, Yuen Long, HK;
Dorothy Duoduo Ma, Changsha, CN;
Assignee:
City University of Hong Kong, Kowloon, HK;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21K 2/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A luminescent system includes a layer of donor material, an acceptor material and a barrier layer therebetween. The energy transfer between the donor and acceptor is biased to the acceptor layer, by an asymmetric energy transfer efficiency created by the barrier layer. Energy from the donor material is converted into photo-luminescence in the acceptor layer by discouraging photo-luminescence quenching caused by energy backflow.