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. 17, 2021
Filed:
Mar. 28, 2018
Sharp Kabushiki Kaisha, Sakai, JP;
Tetsuya Ueno, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
Abstract
The present invention discloses a current-driven display device employing an internal compensation scheme and capable of displaying a favorable image with no occurrence of a bright point not included in the original display content. A voltage Vg at a gate terminal of a drive transistor Mis initialized in a pixel circuitof an organic EL display device before a voltage of a data signal line Dj is written to a holding capacitor Cvia the drive transistor Min a diode-connected state. At this time, an initialization voltage Vini is supplied to the gate terminal via a first initialization transistor Mand a threshold compensation transistor M. In this manner, a path for initializing the gate terminal of the drive transistor Mis formed by the first initialization transistor Mand the threshold compensation transistor Mconnected in series to each other, thereby preventing a voltage reduction at the gate terminal due to leakage current in an off-state transistor.