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:
Jul. 16, 2019
Filed:
Dec. 20, 2016
Shenzhen China Star Optoelectronics Technology Co., Ltd., Shenzhen, CN;
Chenglei Nie, Shenzhen, CN;
Yuanchun Wu, Shenzhen, CN;
SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD., Shenzhen, Guangdong, CN;
Abstract
The invention discloses a hybrid compensation circuit and method for OLED pixel, by using a pixel internal driver circuit () of 4T1C structure to compensate threshold voltage of driving TFT using the source follow approach to achieve fast compensation; and in driving light-emitting phase, using an external compensation circuit () to detect the current flowing through the OLED (D1), comparing, computing and storing the difference between the current flowing through the OLED (D) and a pre-defined current; when the corresponding row of pixel internal driver circuits () entering the threshold voltage programming design phase again, performing compensation on the data signal (Data), correcting compensation result so that the current flowing through the OLED (D) is closer to the pre-defined current to achieve large compensation range.