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. 07, 2021
Filed:
Mar. 28, 2018
Sharp Kabushiki Kaisha, Sakai, JP;
Tetsuya Ueno, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
Abstract
The present disclosure discloses a current-driven display device that uses an internal compensation method and can display a good-quality image with no bright dots that are not included in intended display content. In a pixel circuit of an organic EL display device, a voltage of a gate terminal of a drive transistor is initialized before the voltage of a data signal line is written to a holding capacitor via the diode-connected drive transistors. At this time, an initialization voltage is applied to the gate terminal via a display element initialization transistor, a second light emission control transistor, and a threshold compensation transistor. By initializing the gate terminal with a configuration not including an initialization transistor provided between the gate terminal and an initialization voltage supply line as in the related art, voltage drop at the gate terminal due to leakage current of the transistor in an off state is suppressed.