Patent · US Active

Under-display ultrasonic fingerprint sensors for foldable displays

US11798307B2 · kind B2 · utility

1Cited by

3References

31Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

Shiang-Chi Lin · Taoyuan, TW
Hrishikesh Vijaykumar Panchawagh · Rochester, US
Jessica Liu Strohmann · Cupertino, US
Yipeng Lu · Davis, US
Chin-Jen Tseng · Fremont, US
Kostadin Dimitrov Djordjev · Los Gatos, US
Min-Lun Yang · Beijing, CN
Chia-Wei Yang · Hsinchu, TW

Key dates

Filing date	Aug 30, 2021
Grant date	Oct 24, 2023
Priority date	—
Expiry date	Sep 22, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG06F2203/04102
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

An apparatus may include an ultrasonic sensor stack, a foldable display stack and a transmission enhancement layer. The foldable display stack may include a display stiffener and display stack layers. The display stack layers may form one or more display stack resonators configured to enhance ultrasonic waves transmitted by the ultrasonic sensor stack in a first ultrasonic frequency range. In some implementations, a transmission enhancement resonator may include the display stiffener and the transmission enhancement layer. In some examples, the transmission enhancement resonator may include at least a portion of the ultrasonic sensor stack. The transmission enhancement resonator may be configured to enhance the ultrasonic waves transmitted by the ultrasonic sensor stack in the first ultrasonic frequency range.

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