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. 04, 2014
Filed:
Dec. 30, 2010
Pei-ying Chang, Taoyuan County, TW;
Shi-ing Huang, Miaoli County, TW;
Tien-fu Huang, Hsinchu County, TW;
Chen-dao Shiao, Hsinchu, TW;
Pei-Ying Chang, Taoyuan County, TW;
Shi-Ing Huang, Miaoli County, TW;
Tien-Fu Huang, Hsinchu County, TW;
Chen-Dao Shiao, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
Disclosed is a light-emitting device, including an LED light source and a light diffusion element. The light diffusion element, covering at least a part of the LED light source, is composed of a first polymer, a second polymer, or a blend of them. The first polymer has a larger crystal diameter than that of the second polymer. The first polymer is made of polypropylene or ethylene-propylene copolymer. The second polymer is made of polyethylene, polypropylene, or ethylene-propylene copolymer. A blend of certain ratios of the first and second polymer gives rise of an excellent material that has improved light diffusion. This material can be widely adopted to current light fixtures for its evenly distributed lighting and great brightness.