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. 07, 2021
Filed:
Jun. 08, 2018
Sharp Kabushiki Kaisha, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
Abstract
A charge pull-out period is set after power off, and an all-on control signal is set to a high level in the charge pull-out period. A high-level voltage which is output to a scanning line drive circuit formed on a liquid crystal panel is kept at a high level even after power off until a middle of the charge pull-out period. A common electrode control circuit for connecting a common electrode to a ground when the all-on control signal is at the high level and the high-level voltage is at an operation level is configured using two resistors, a NOT circuit, and two FETs, and is provided to a liquid crystal display device. With this, a liquid crystal display device which can lower a common electrode voltage to a ground level when power off and can prevent burn-in after power on is provided.