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:
Feb. 07, 2012
Filed:
Aug. 05, 2009
Shuhei Yokoyama, Ishikawa-gun, JP;
Masuyuki Oota, Hakusan, JP;
Shuhei Yokoyama, Ishikawa-gun, JP;
Masuyuki Oota, Hakusan, JP;
Toshiba Mobile Display Co., Ltd., Tokyo, JP;
Abstract
An organic EL display device includes a pixel electrode which is disposed in each of first to third organic EL elements, a first light emission layer which includes a first dopant material having a first absorbance peak, the first light emission layer extending over the first to third organic EL elements and being disposed above the pixel electrode, a second light emission layer which includes a second dopant material having a second absorbance peak and is disposed above the first light emission layer, a third light emission layer which is disposed above the second light emission layer, a counter-electrode which is disposed above the third light emission layer, and a hole transport layer which is formed of a material having an absorbance bottom on a shorter wavelength side than the first absorbance peak and the second absorbance peak in absorbance spectrum characteristics of the hole transport layer.