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:
Jun. 03, 2014
Filed:
Feb. 16, 2012
Wai Y. Leung, Ames, IA (US);
Joong-mok Park, Ames, IA (US);
Zhengqing Gan, Pleasant Hill, CA (US);
Kristen P. Constant, Ames, IA (US);
Joseph Shinar, Ames, IA (US);
Ruth Shinar, Ames, IA (US);
Kai-ming Ho, Ames, IA (US);
Wai Y. Leung, Ames, IA (US);
Joong-Mok Park, Ames, IA (US);
Zhengqing Gan, Pleasant Hill, CA (US);
Kristen P. Constant, Ames, IA (US);
Joseph Shinar, Ames, IA (US);
Ruth Shinar, Ames, IA (US);
Kai-Ming Ho, Ames, IA (US);
Iowa State University Research Foundation, Inc., Ames, IA (US);
Abstract
Provided are microlens arrays for use on the substrate of OLEDs to extract more light that is trapped in waveguided modes inside the devices and methods of manufacturing same. Light extraction with microlens arrays is not limited to the light emitting area, but is also efficient in extracting light from the whole microlens patterned area where waveguiding occurs. Large microlens array, compared to the size of the light emitting area, extract more light and result in over 100% enhancement. Such a microlens array is not limited to (O)LEDs of specific emission, configuration, pixel size, or pixel shape. It is suitable for all colors, including white, for microcavity OLEDs, and OLEDs fabricated directly on the (modified) microlens array.