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. 25, 2014
Filed:
Nov. 09, 2012
Lg Display Co., Ltd., Seoul, KR;
Hwa-Kyung Kim, Gyeonggi-do, KR;
Sung-Hoon Pieh, Seoul, KR;
Jae-II Song, Gyeonggi-do, KR;
Sung-Jae Ko, Chungcheongnam-do, KR;
LG Display Co., Ltd., Seoul, KR;
Abstract
A white organic light emitting device, with improved color shift characteristics and improved efficiency according to viewing angle changes by controlling conditions for designing an optical path in organic material layers between a cathode and an anode or adjusting interior or exterior thicknesses of the organic material layers, has a structure including a first electrode and layers between the first electrode and a second electrode satisfies an optical path condition represented by the following equation with respect to emissions of the first and second stacks, where λ is an emission peak wavelength of the first stack or the second stack, nand dare a refractive index and a thickness of a transparent electrode selected from the first and second electrode, and nand dare a refractive index and a thickness of any one of the layers disposed between the first electrode and the second electrode, respectively.