Ultrasonic fingerprint sensor for under-display applications

US12327426B2 · kind B2 · utility

Assignee

• QUALCOMM Incorporated · US

Inventors

• Hrishikesh Vijaykumar Panchawagh · Rochester, US
• Ila BADGE · San Jose, US
• Yipeng Lu · Davis, US
• Kostadin Dimitrov Djordjev · Los Gatos, US
• Suryaprakash Ganti · Los Altos, US
• Chin-Jen Tseng · Fremont, US
• Nicholas Ian Buchan · San Jose, US
• Tsongming Kao · Sunnyvale, US
• Leonard Eugene Fennell · San Jose, US
• Firas Sammoura · Dublin, US
• Jessica Liu Strohmann · Cupertino, US
• David William Burns · Minneapolis, US

Key dates

• Filing date: Jan 30, 2023
• Grant date: Jun 10, 2025
• Expiry date: Jan 30, 2043

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2102/311
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Disclosed are methods, devices, apparatuses, and systems for an under-display ultrasonic fingerprint sensor. A display device may include a platen, a display underlying the platen, and an ultrasonic fingerprint sensor underlying the display, where the ultrasonic fingerprint sensor is configured to transmit and receive ultrasonic waves via an acoustic path through the platen and the display. A light-blocking layer and/or an electrical shielding layer may be provided between the ultrasonic fingerprint sensor and the display, where the light-blocking layer and/or the electrical shielding layer are in the acoustic path. A mechanical stress isolation layer may be provided between the ultrasonic fingerprint sensor and the display, where the mechanical stress isolation layer is in the acoustic path.