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. 26, 2021
Filed:
Sep. 28, 2018
Apple Inc., Cupertino, CA (US);
Chin-Wei Lin, San Jose, CA (US);
Fan Gui, San Jose, CA (US);
Hung Sheng Lin, San Jose, CA (US);
Hyunwoo Nho, Stanford, CA (US);
Jie Won Ryu, Campbell, CA (US);
Junhua Tan, Santa Clara, CA (US);
Kingsuk Brahma, Mountain View, CA (US);
Majid Gharghi, San Carlos, CA (US);
Mohammad Reza Esmaeili Rad, San Jose, CA (US);
Shinya Ono, Cupertino, CA (US);
Yun Wang, Cupertino, CA (US);
Zino Lee, Gyeonggi-do, KR;
Apple Inc., Cupertino, CA (US);
Abstract
A display may include an array of organic light-emitting diode display pixels having transistors characterized by threshold voltages subject to transistor variations. Compensation circuitry may be used to sense a current from selected display pixels. A display pixel may include a drive transistor, a gate setting transistor for driving a reference voltage onto the gate terminal of the drive transistor, a data loading and current sensing transistor for connecting the drive transistor to a data/current-sensing line, a light-emitting diode, an emission control transistor coupled between the drive transistor and the diode, and an anode resetting transistor for selectively resetting the anode terminal of the diode. During in-frame current sensing operations, the emission control transistor may be turned off to decouple the drive transistor from the diode, thereby blocking off any residue current and lateral leakage current that may be present at the diode.