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:
Mar. 19, 2019
Filed:
Apr. 21, 2015
Sharp Kabushiki Kaisha, Sakai, Osaka, JP;
Kohhei Tanaka, Sakai, JP;
Takayuki Nishiyama, Sakai, JP;
Takeshi Noma, Sakai, JP;
Ryo Yonebayashi, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
Abstract
A technique of, in the case of changing, at predetermined time intervals, a drive circuit for switching a gate line to a selected state, preventing a stopped drive circuit from malfunctioning is provided. Each of a plurality of drive circuits provided for each gate line in an active-matrix substrate includes: a selection circuit unit including an output switching element that is turned on to apply a voltage to the gate line in response to a control signal; an internal line connected to a gate terminal of the output switching element and the gate line; and a potential control circuit unit connected to the internal line for controlling a potential of the internal line in response to the control signal. At predetermined time intervals, a signal supply unit: supplies, to at least one of the plurality of drive circuits, a potential control signal so that the potential of the internal line is controlled to be lower than a threshold voltage of the output switching element by the potential control circuit unit; and supplies, to each of the other drive circuits, a drive signal so that a selection voltage is applied to the gate line by the selection circuit unit.