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:
Aug. 30, 2011
Filed:
Aug. 03, 2007
Sukekazu Aratani, Hitachiota, JP;
Masao Shimizu, Hitachi, JP;
Toshiyuki Matsuura, Mobara, JP;
Masahiro Tanaka, Chiba, JP;
Masaya Adachi, Hitachi, JP;
Sukekazu Aratani, Hitachiota, JP;
Masao Shimizu, Hitachi, JP;
Toshiyuki Matsuura, Mobara, JP;
Masahiro Tanaka, Chiba, JP;
Masaya Adachi, Hitachi, JP;
Hitachi Displays, Ltd., Chiba, JP;
Abstract
An organic light-emitting display device is provided which achieves high efficiency by reducing the number of steps for vapor deposition using a mask with a fine pattern and photolithography. A blue light-emitting portion (B), a green light-emitting portion (G) and a red light-emitting portion (R) placed on a substratehave a thickness relationship represented as (blue light-emitting portion (B)<green light-emitting portion (G)=red light-emitting portion (R)), so that the green light-emitting portion (G) and the red light-emitting portion are formed with common deposition steps. In addition, an electron injection layerand an electron transport layerbetween a lower electrode and an organic light-emitting layerare formed with common depositions steps in the light-emitting portions (B, G and R).