Patent · US Active

Ultrasonic sensor, method for preparing ultrasonic sensor, and display apparatus

US12367700B2 · kind B2 · utility

0Cited by

0References

20Claims

0Family size

Assignee

BOE Technology Group Co., Ltd. · CN

Inventors

Yue GOU · Beijing, CN
Yingming Liu · Beijing, CN
Liang Cui · 安丰镇, CN
Xiufeng Li · Beijing, CN
Yanling Han · Beijing, CN
Yaqian Ji · Beijing, CN
Chenyang Zhang · Beijing, CN
Peixiao Li · Beijing, CN
Yuzhen Guo · Beijing, CN
Yingzi WANG · Beijing, CN

Key dates

Filing date	May 31, 2021
Grant date	Jul 22, 2025
Priority date	—
Expiry date	May 29, 2043

Classification

Technology area (CPC H)Electricity
CPC primaryH10N39/00
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

An ultrasonic sensor, a preparation method of the ultrasonic sensor, and a display apparatus are provided. The ultrasonic sensor includes a texture recognition region and a contrast region. The contrast region is located on at least one side of the texture recognition region. The texture recognition region includes at least one recognizing unit, and the contrast region includes at least one contrast unit. The at least one recognizing unit includes a first dielectric material layer, and the at least one contrast unit includes a second dielectric material layer. The first dielectric material layer and the second dielectric material layer are made of a same material. The first dielectric material layer exhibits piezoelectric properties. A piezoelectric strain constant of the first dielectric material layer is greater than a piezoelectric strain constant of the second dielectric material layer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.