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:
Sep. 08, 2020
Filed:
Aug. 11, 2016
Cambridge Display Technology Limited, Cambridgeshire, GB;
Philip Benzie, Huntingdon, GB;
Colin Baker, Cambridge, GB;
Adam Strevens, Cambridge, GB;
William Young, Cambridge, GB;
Cambridge Display Technology Limited, Godmanchester, GB;
Abstract
An organic light emitting device which emits white light in use, comprising a reflective anode (), a first light emitting layer () which emits red light located over said anode, a second light emitting layer () which emits blue light and green light located over said first light emitting layer, and a cathode structure located over said second light emitting layer comprising a first semi-reflecting layer () and a second semi-reflecting layer () with a layer () of light transmissive material between the first and second semi-reflecting semi-transparent layers, the distance between the reflective anode () and the first semi-reflecting semi-transparent layer () being selected to form a micro-cavity which enhances blue light emission and red light emission from the device, and the distance between the reflective anode () and the second semi-reflecting semi-transparent layer () being selected to enhance green light emission from the device.