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:
Oct. 03, 2017
Filed:
Nov. 07, 2014
Peking University Shenzhen Graduate School, Shenzhen, CN;
Shengdong Zhang, Shenzhen, CN;
Cuicui Wang, Shenzhen, CN;
Chuanli Leng, Shenzhen, CN;
Longyan Wang, Shenzhen, CN;
Peking University Shenzhen Graduate School, Shenzhen, Guangdong, CN;
Abstract
A pixel circuit, a drive method based on the pixel circuit, and a display device. The pixel circuit comprises: a first capacitor (C), a second capacitor (C), a second transistor (T), a third transistor (T) and a light-emitting branch for being coupled between a first common electrode (VDD) and a second common electrode (VSS); wherein the light-emitting branch comprises a first transistor (T), a fourth transistor (T) and a light-emitting element (OLED) which are connected in series; a first electrode of the first transistor (T) is coupled to a second electrode of the fourth transistor (T), and a coupling node is a third node (C); and a control electrode of the fourth transistor (T) is used for inputting a second scanning control signal (V), and the fourth transistor (T) switches the ON/OFF state of the light-emitting branch in response to the second scanning control signal (V). At the programming stage, a threshold voltage of the first transistor (T) is input to a first node (A) through the third transistor (T) and is stored; and at the light-emitting stage, a light-emitting current for driving the light-emitting element (OLED) is generated according to information about a voltage difference across two ends of the first capacitor (C). The pixel circuit is used for compensating for the threshold voltage shift of the first transistor (T) and the light-emitting element (OLED).