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:
Nov. 01, 2022
Filed:
Oct. 02, 2019
Lg Display Co., Ltd., Seoul, KR;
SeonYeong Kim, Seoul, KR;
Sungjin Lee, Seoul, KR;
LG Display Co., Ltd., Seoul, KR;
Abstract
The present disclosure relates to ultrasonic sensors, ultrasonic sensing devices and display devices. The ultrasonic sensor includes an array of thin film transistors in which first electrodes are disposed, a piezoelectric material, and second electrodes. In order to generate ultrasonic waves and perform sensing, the second electrode is disposed in a patterned structure in which the second electrode is divided into multiple second electrodes, and a high voltage in the form of pulse is applied to the second electrode. Thus, in accordance with embodiments of the present disclosure, a high voltage is not applied to the array of thin film transistors; therefore, it is possible to reduce or overcome degradation of circuit elements disposed in the array of thin film transistors. Accordingly, it is possible to improve the reliability and lifetime of the circuit elements disposed in the array of thin film transistors, while performing sensing.