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. 31, 2015
Filed:
Nov. 29, 2010
Yukio Yamauchi, Shizuoka, JP;
Takeshi Fukunaga, Kanagawa, JP;
Yukio Yamauchi, Shizuoka, JP;
Takeshi Fukunaga, Kanagawa, JP;
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Abstract
An EL display having high operating performance and reliability is provided. LDD regionsthroughof a switching TFTformed in a pixel are formed such that they do not overlap gate electrodesandto provide a structure which is primarily intended for the reduction of an off-current. An LDD regionof a current control TFTis formed such that it partially overlaps a gate electrodeto provide a structure which is primarily intended for the prevention of hot carrier injection and the reduction of an off-current. Appropriate TFT structures are thus provided depending on required functions to improve operational performance and reliability.