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:
Sep. 09, 2014
Filed:
Sep. 19, 2013
Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;
Yukio Yamauchi, Shimada, JP;
Takeshi Fukunaga, Atsugi, JP;
Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken, JP;
Abstract
An EL display device capable of performing clear multi-gradation color display and electronic equipment provided with the EL display device are provided, wherein gradation display is performed according to a time-division driving method in which the luminescence and non-luminescence of an EL element () disposed in a pixel () are controlled by time, and the influence by the characteristic variability of a current controlling TFT () is prevented. When this method is used, a data signal side driving circuit () and a gate signal side driving circuit () are formed with TFTs that use a silicon film having a peculiar crystal structure and exhibit an extremely high operation speed.