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:
Jul. 14, 2020
Filed:
Dec. 14, 2018
Tianma Japan, Ltd., Kanagawa, JP;
Kazushige Takechi, Kanagawa, JP;
Shinnosuke Iwamatsu, Yamagata, JP;
Yutaka Abe, Yamagata, JP;
Yutaka Murakami, Yamagata, JP;
Toru Yahagi, Yamagata, JP;
Mutsuto Katoh, Yamagata, JP;
TIANMA JAPAN, LTD., Kanagawa, JP;
Abstract
An electrostatic sensing device includes a sensor oxide semiconductor TFT, and a controller configured to control the sensor oxide semiconductor TFT. The sensor oxide semiconductor TFT includes an oxide semiconductor active layer, a source electrode connected with the oxide semiconductor active layer, a drain electrode connected with the oxide semiconductor active layer, a gate electrode behind the oxide semiconductor active layer, and a gate insulating layer between the gate electrode and the oxide semiconductor active layer The controller is configured to measure a difference from a reference current of a current flowing between the source electrode and the drain electrode, while applying a driving voltage to the gate electrode, and determine polarity of electrostatic charge of the measurement target based on direction of the difference from the reference current.