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:
Aug. 10, 2021
Filed:
Jul. 10, 2020
Sharp Kabushiki Kaisha, Osaka, JP;
Tong Lu, Oxford, GB;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A pixel circuit for a display device provides enhanced performance by performing a first threshold compensation phase that also operates to pre-charge a compensating storage capacitor, and then performing a further second threshold compensation combined with data programming during a shortened programming time. During the first threshold compensation phase, the threshold voltage of the drive transistor is stored in the compensating storage capacitor. During the combined data programming and second threshold compensation phase, the data voltage is stored in a programming capacitor, and the drive transistor threshold voltage is also stored in the programming capacitor. As the threshold voltage already is stored at the storage capacitor, and thus the node where the storage capacitor and the programming capacitor connect has been pre-charged with the threshold voltage, the pre-charging effect shortens the time needed for the programming capacitor to store the threshold voltage, which results in a short programming time while achieving high compensation accuracy.