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. 22, 2019
Filed:
Jun. 13, 2014
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Noritaka Kishi, Osaka, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
Abstract
A detection/correction output circuit of a data-line driving circuit is provided with a transimpedance circuit including an operational amplifier and a current-detection transistor to detect a driving current that has passed through a driving transistor in a pixel circuit. The output voltage of the operational amplifier is amplified by using resistance elements connected in series. Thereby, it is possible to compensate the threshold voltage of the driving transistor with high accuracy by establishing a prescribed relationship between the gain of the driving transistor and the gain of the current detection transistor (by matching both gains) even if there is a difference between both gains. The output voltage of the operational amplifier may be amplified using a non-inverting amplifier circuit.