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:
Dec. 07, 2004
Filed:
Jun. 12, 2003
Chang Tae Kim, Gyounggi-do, KR;
EpiValley Co., Ltd., Gyounggi-Do, KR;
Abstract
The present invention relates to a semiconductor LED device comprising a pumping layer with high light emitting efficiency and an active layer with smaller bandgap converting the absorbed light into any kinds of light of wavelength as required, which generates light from the AlGaInN pumping layer containing less In, projects the rays of light on the active layer containing more In, lets the required light of wavelength emit and decreases the blue shift caused by electric current, thereby increasing the light emitting efficiency and emitting lights with more than two wavelengths from one Led device. This invention enables to obtain various light of wavelength from one device and form the element through only one epitaxy process, thereby increasing reproductivity, yield, and efficiency by not using the fluorescent materials lowering the efficiency when forming white light.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile