公开(公告)号：CA2929723C

公开(公告)日：2020-09-15

申请号：CA2929723

申请日：2014-12-12

Applicant: QUALCOMM INC

Inventor： GANTI SURYAPRAKASH ,  BURNS DAVID WILLIAM ,  GRIFFITHS JONATHAN CHARLES

IPC: G06F3/043 ,  G06K9/00

Abstract: An apparatus may include a one- or two-dimensional array of micromechanical ultrasonic transducer (PMUT) elements positioned below, beside, with, on, or above a backplane of a visual display. The backplane may be a thin-film transistor (TFT) backplane. The array of PMUT elements may be a piezoelectric micromechanical ultrasonic transducer (PMUT) array or a capacitive micromechanical ultrasonic transducer (CMUT) array. The PMUT array may be configurable to operate in modes corresponding to multiple frequency ranges. When operating in the low-frequency mode, the apparatus may be capable of gesture detection. A high-frequency mode may include a fingerprint sensor mode or a stylus detection mode.

公开(公告)号：CA2950919A1

公开(公告)日：2016-01-14

申请号：CA2950919

申请日：2015-06-08

Applicant: QUALCOMM INC

Inventor： LASITER JON BRADLEY ,  SHENOY RAVINDRA VAMAN ,  GOUSEV EVGENI PETROVICH ,  PANCHAWAGH HRISHIKESH ,  BURNS DAVID WILLIAM ,  KUO NAI-KUEI ,  GRIFFITHS JONATHAN CHARLES ,  GANTI SURYAPRAKASH

IPC: B06B1/06 ,  B81B3/00 ,  G06F3/043 ,  H01L41/09

Abstract: A piezoelectric micromechanical ultrasonic transducer (PMUT) includes a multilayer stack disposed on a substrate. The multilayer stack may include an anchor structure disposed over the substrate, a piezoelectric layer stack disposed over the anchor structure, and a mechanical layer disposed proximate to the piezoelectric layer stack. The piezoelectric layer stack may be disposed over a cavity. The mechanical layer may seal the cavity and, together with the piezoelectric layer stack, is supported by the anchor structure and forms a membrane over the cavity, the membrane being configured to undergo one or both of flexural motion and vibration when the PMUT receives or transmits ultrasonic signals.

公开(公告)号：CA2929723A1

公开(公告)日：2015-06-18

申请号：CA2929723

申请日：2014-12-12

Applicant: QUALCOMM INC

Inventor： GANTI SURYAPRAKASH ,  BURNS DAVID WILLIAM ,  GRIFFITHS JONATHAN CHARLES

IPC: G06F3/043 ,  G06K9/00

Abstract: An apparatus may include a one- or two-dimensional array of micromechanical ultrasonic transducer (PMUT) elements positioned below, beside, with, on, or above a backplane of a visual display. The backplane may be a thin-film transistor (TFT) backplane. The array of PMUT elements may be a piezoelectric micromechanical ultrasonic transducer (PMUT) array or a capacitive micromechanical ultrasonic transducer (CMUT) array. The PMUT array may be configurable to operate in modes corresponding to multiple frequency ranges. When operating in the low-frequency mode, the apparatus may be capable of gesture detection. A high-frequency mode may include a fingerprint sensor mode or a stylus detection mode.