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:
May. 07, 2019
Filed:
Nov. 27, 2017
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen, CN;
Jimu Kuang, Shenzhen, CN;
Hongjun Xie, Shenzhen, CN;
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Shenzhen, Guangdong, CN;
Abstract
The invention provides an OLED pixel driving circuit and OLED display device. The OLED pixel driving circuit uses 5T1C structure and switch (K). By switch signal (Switch) controlling the switch (K) to connect first pin (K) and second pin (K) to enter display mode, and to connect first pin (K) and third pin (K) to enter sense mode, the ADC (ADC) senses the threshold voltage of the fourth TFT (T), converted and used for data compensation in the display mode, able to compensate and eliminate the impact of threshold voltage of the fourth TFT (T) on the current flowing through the OLED (D); the light-emitting control signal (EM) controls the fifth TFT (T) connected to the OLED (D) to cut off during the data writing stage (t) to keep the data signal voltage and the gate voltage of the fourth TFT (T) unaffected by the OLED (D) threshold voltage.