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:
Mar. 24, 2015
Filed:
Oct. 05, 2011
Herbert Friedrich Boerner, Aachen, DE;
Helga Hummel, Aachen, DE;
Claudia Michaela Goldmann, Kreuzau, DE;
Herbert Friedrich Boerner, Aachen, DE;
Helga Hummel, Aachen, DE;
Claudia Michaela Goldmann, Kreuzau, DE;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
The invention provides an OLED device with improved light out-coupling, which can be manufactured easy and reliable at low costs, which comprises an electroluminescent layer stack () on top of a substrate (), where the electroluminescent layer stack () comprises an organic light-emitting layer stack () with one or more organic layers sandwiched between a first electrode () facing towards the substrate () and a 10 second electrode (), where the second electrode () comprises a layer stack of at least a transparent conductive protection layer () on top of the organic light-emitting layer stack (), a transparent organic conductive buckling layer () on top of the protection layer () having a glass transition temperature lower than the lowest glass transition temperature of the organic layers within the organic light-emitting layer stack () and a stress inducing layer() on top of the buckling layer () to introduce stress to the buckling layer (). The invention further relates to a method to manufacture such OLED devices with heating the electroluminescent layer () stack to a temperature, which is above the glass transition temperature of the buckling layer () and below the lowest glass transition temperature of the organic layers within the organic light-emitting layer stack () for a time period sufficient 20 to obtain buckles (B) within the buckling layer ().