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. 03, 2015
Filed:
Dec. 23, 2005
Natasha M. Conway, Cambridge, GB;
Nalinkumar Patel, Cambridge, GB;
Richard Wilson, Cambridge, GB;
Ilaria Grizzi, Cambridge, GB;
Natasha M. Conway, Cambridge, GB;
Nalinkumar Patel, Cambridge, GB;
Richard Wilson, Cambridge, GB;
Ilaria Grizzi, Cambridge, GB;
CAMBRIDGE DISPLAY TECHNOLOGY LIMITED, Cambridgeshire, GB;
CDT OXFORD LIMITED, Cambridgeshire, GB;
Abstract
An organic light emissive device, which comprises: an anode; a cathode; and an organic light emissive region between the anode and the cathode, which region comprises: a layer of blue light electroluminescent organic material which emits light having first CIE co-ordinates by exciton radiative decay; and a layer of longer wavelength electroluminescent organic material which intrinsically emits light having second CIE co-ordinates by exciton radiative decay; wherein the layers of blue light and longer wavelength materials are selected so that the organic light emissive region emits white light falling within a region having a CIE χ coordinate equivalent to that emitted by a black body at 3000-9000K and CIE γ co-ordinate of said light emitted by a black body.