Ultrasonic fingerprint sensor applied under display

Methods, devices, apparatuses, and systems for an ultrasonic fingerprint sensor under a display are disclosed. A display device may include a platen, a display underlying the platen, and an ultrasonic fingerprint sensor underlying the display, wherein 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 disposed between the ultrasonic fingerprint sensor and the display, wherein the light blocking layer and/or the electrical shielding layer are/is in the acoustic path. A mechanical stress isolation layer may be disposed between the ultrasonic fingerprint sensor and the display, wherein the mechanical stress isolation layer is in the acoustic path. 本发明揭示用于显示器下超声波指纹传感器的方法、装置、设备及系统。显示装置可包含压板、下伏于所述压板的显示器及下伏于所述显示器的超声波指纹传感器，其中所述超声波指纹传感器经配置以经由通过所述压板及所述显示器的声学路径发射并接收超声波。光阻断层及/或电屏蔽层可设置于所述超声波指纹传感器与所述显示器之间，其中所述光阻断层及/或所述电屏蔽层在所述声学路径中。机械应力隔离层可设置于所述超声波指纹传感器与所述显示器之间，其中所