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. 22, 2020
Filed:
May. 14, 2019
Sharp Kabushiki Kaisha, Osaka, JP;
Tong Lu, Oxford, GB;
Michael James Brownlow, Oxford, GB;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A pixel circuit has enhanced performance by minimizing noise effects from the data and reference voltage lines. To prevent data line noise from interfering with the drive transistor gate voltage during emission, a triple gate isolation is used between the data voltage line and the gate of the drive transistor by which three transistors are connected between the data voltage line and the gate of the drive transistor. To further improve the isolation, one of the middle nodes of the triple gate farthest from the data voltage line is connected to one floating node that is connectable to a reference voltage during the threshold compensation phase. A first capacitor is used for the threshold compensation, and a second capacitor is used to scale the data voltage during programming. The threshold compensation and data programming operations are thereby independent of each other to minimize programming time.