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:
Feb. 08, 2011
Filed:
Oct. 18, 2007
Shu-ru Chung, Taichung County, TW;
Kuan-wen Wang, Taipei, TW;
Chih-cheng Chiang, Hsinchu County, TW;
Shu-Ru Chung, Taichung County, TW;
Kuan-Wen Wang, Taipei, TW;
Chih-Cheng Chiang, Hsinchu County, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
The invention provides a light emitting diode device and a fabrication method thereof. The device comprises a pair of electrodes and one of which is electrically contacted with a holder, an LED chip fixed in the holder, a wrapping material formed in the holder and covering the LED chip, and a plurality of nanocrystals having a quantum dot state dispersed in the wrapping material. The nanocrystals satisfy the formula, ZnCdS and 0<x<1, and can produce a luminous wavelength of about 400 nm to 800 nm. The device further comprises a plurality of organic molecules bonded to the surface of the nanocrystals. Because a molecular interaction occurs between the organic molecules and the wrapping material, the nanocrystals are uniformly dispersed in the wrapping material to improve luminous uniformity. Furthermore, the wrapping material can protect the nanocrystals from oxidation to avoid efficiency decaying.