公开(公告)号：US20230063693A1

公开(公告)日：2023-03-02

申请号：US17446436

申请日：2021-08-30

Applicant: QUALCOMM Incorporated

Inventor： Shiang-Chi LIN ,  Hrishikesh Vijaykumar PANCHAWAGH ,  Jessica Liu STROHMANN ,  Yipeng LU ,  Chin-Jen TSENG ,  Kostadin Dimitrov DJORDJEV ,  Min-Lun YANG ,  Chia-Wei YANG

IPC: G06K9/00 ,  G06F21/32 ,  G01S7/52

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.

公开(公告)号：US20210377670A1

公开(公告)日：2021-12-02

申请号：US17302714

申请日：2021-05-11

Applicant: QUALCOMM Incorporated

Inventor： Jessica Liu STROHMANN ,  Hrishikesh Vijaykumar PANCHAWAGH ,  Nicholas Ian BUCHAN ,  Yipeng LU ,  Kostadin Dimitrov DJORDJEV

IPC: H04R17/00 ,  B06B1/06 ,  H01L41/193 ,  H04R17/02 ,  H04R1/02

Abstract: A mobile device includes one or more piezoelectric polymer layers underlying a display. The one or more piezoelectric polymer layers may be electrically driven to operate in either a d33 stretching mode or a d31 bending mode. The mobile device functions as an ultrasonic sensor in the d33 stretching mode and as an audio speaker/microphone or a proximity sensor in the d31 bending mode. The piezoelectric polymer layer operating in the d31 bending mode may be directly mechanically coupled to a display, indirectly mechanically coupled to the display and underlying an ultrasonic sensor stack, or integrated in the ultrasonic sensor stack. Signal performance of the piezoelectric polymer layer operating in the d31 bending mode may be enhanced or modulated by having a larger area, multiple layers, bi-pole or uni-pole driving with multiple layers, one or more stiff adhesives, a spacer layer, one or more mass features, a thin TFT layer, a thick piezoelectric polymer layer, or combinations thereof.

公开(公告)号：US20210056276A1

公开(公告)日：2021-02-25

申请号：US16544681

申请日：2019-08-19

Applicant: QUALCOMM Incorporated

Inventor： Yipeng LU ,  Jessica Liu STROHMANN ,  Ila BADGE ,  Hrishikesh Vijaykumar PANCHAWAGH ,  Tsongming KAO

IPC: G06K9/00

Abstract: A device and method for improved sensing with a biometric sensor assembly such as an ultrasound fingerprint sensor using an anti-fingerprint, oleophobic, or hydrophobic coating applied to a surface above the biometric sensor assembly. The coating improves the mechanical coupling of a human finger to the surface, helping to reduce acoustic loss through the finger to surface interface, improving at least the false-rejection ratio.