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:
Oct. 23, 2012
Filed:
Oct. 14, 2010
Jae-eung OH, Gyeonggi-do, KR;
Young-kyun Noh, Daejeon, KR;
Bun-hei Koo, Seoul, KR;
WOOREE LST Co. Ltd., Gyeonggi-do, KR;
Abstract
The present invention relates to a light-emitting device using a clad layer consisting of asymmetric units, wherein the clad layer is provided by repeatedly stacking a unit having an asymmetric energy bandgap on upper and lower portions of an active layer, and the inflow of both electrons and holes into the active layer is arbitrarily controlled through the clad layer, so that the internal quantum efficiency can be improved. The light-emitting device using the clad layer consisting of the asymmetric units according to the present invention is characterized in that the clad layer is provided on at least one of the upper and lower portions of the active layer and consists of one or plural units, wherein the unit has a structure in which the first to nunit layers (n is a natural number equal to or greater than three) having different energy bandgaps are sequentially stacked and has an asymmetric energy band diagram.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile