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:
Mar. 14, 2014
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Shunpei Yamazaki, Tokyo, JP;
Jun Koyama, Kanagawa, JP;
Kunitaka Yamamoto, Kanagawa, JP;
Toshimitsu Konuma, Kanagawa, JP;
Abstract
An object of the present invention is to provide an EL display device, which has a high operating performance and reliability. A third passivation filmis disposed so as to be in contact with an EL elementwhich comprises a pixel electrode (anode), an EL layerand a cathode, to make a structure in which heat generated by the EL elementis radiated. Further, the third passivation filmprevents alkali metals within the EL elementfrom diffusing into the TFTs side, and prevents moisture and oxygen of the TFTs side from penetrating into the EL element. More preferably, heat radiating effect is given to a fourth passivation filmto make the EL elementto be enclosed by heat radiating layers.