Qualcomm Incorporated

Qualcomm Mems Technologies, Inc.

Hitachi Global Storage Technologies Netherlands B.v.

Snaptrack Incorporated

Hitachi Global Storage Netherlands, B.v.

Nicholas Ian Buchan

Hrishikesh Vijaykumar Panchawagh

Kostadin Dimitrov Djordjev

David William Burns

Yipeng Lu

Jessica Liu Strohmann

Chin-Jen Tseng

Leonard Eugene Fennell

John Keith Schneider

Srinivasan Kodaganallur Ganapathi

Timothy C Reiley

Sandeep Louis D'Souza

Jack Conway Kitchens, Ii

Jae Hyeong Seo

Tsongming Kao

Suryaprakash Ganti

Ravindra Vaman Shenoy

Samir Kumar Gupta

Philip Jason Stephanou

Firas Sammoura

Stephen Michael Gojevic

Evan Michael Breloff

Kristopher Andrew Lavery

Emily Kathryn Brooks

Jon Gregory Aday

Ila Ravindra Badge

James L Hedrick

Robert Dennis Miller

Cherngye Hwang

Mario Francisco Velez

Ion E Opris

Craig Jon Hawker

Hong Bok We

Willi Volksen

Kurt Edward Petersen

Teddie Peregrino Magbitang

Jack Conway Kitchens

Cenk Acar

Sameer Wadhwa

Dennis R McKean

Timothy Dickinson

Li Fei Zheng

Raj Kumar

Eugene Dantsker

Kollengode S Narayanan

Muhammed Ibrahim Sezan

Sai Praneeth Sreeram

Justin Phelps Black

Fitzgerald John Archibald

Ashish Hinger

Wesley LeRoy Hillman

Michael William Chaw

Nai-Kuei Kuo

Alexei Stoianov

Livingstone Song

Sanghoon Bae

Steve Joseph Bezuk

Dan Dawson

James Anthony Miranto

Ali Lopez

Ericson Cheng

Sean Clemenza

Peng Cheng Lin

Nirma Lnu

Kurt Peterson

Thad William Smith

Camilo Perez Saaibi

Ye Zhan

Sumit Agrawal

Legardo Reyes

Vivekananda Parampalli Adiga

Bernard Herrera Soukup

Michelle Ma Thin Thin Htay Chan

Shounak Uday Gore

Nathaniel Robert Bennett

Srikanth Chilukuru

Max Hamel

Fan Zhong

Harish Ananthakrishnan

Jack Conway Ii Kitchens

Some disclosed examples pertain to an apparatus that can include a platen, a light source system, a receiver system, and an electromagnetic interference (EMI) shield. The light source system can include light source system circuitry, a light-emitting component, and a light guide component having a substantially uniform cross-section. The light-emitting component provides light to an area of the platen via the light guide component. The receiver system can include at least two receiver stack portions residing proximate on either side of the light guide component. The receiver system detects acoustic waves corresponding to a photoacoustic response of a target object proximate the area of the platen, to light emitted by the light source system. The EMI shield shields the receiver system from at least some of the EMI produced by the light source system circuitry. The light guide component conveys light through a portion of the EMI shield.

Compact photoacoustic sensor

An apparatus may be configured to control a light source system residing in or on a first support structure portion of the apparatus to transmit light through an ear volume residing between a first ear portion and a second ear portion. The apparatus may be configured to receive, from a receiver system residing in or on a second support structure portion of the apparatus proximate the second ear portion, receiver system signals corresponding to acoustic waves caused by a photoacoustic response to light emitted by the light source system of a) a blood vessel residing within the ear volume, b) blood within the blood vessel, or a combination thereof. The control system may be configured to estimate one or more cardiac features based, at least in part, on the receiver system signals.

Devices, methods and systems for ear-based photoacoustic plethysmography

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.

Ultrasonic fingerprint sensor for under-display applications

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.

Audio speaker and proximity sensor with piezoelectric polymer technology

An ultrasonic sensor system may include an ultrasonic transceiver layer, a thin-film transistor (TFT) layer proximate a first side of the ultrasonic transceiver layer, a frequency-splitting layer proximate a second side of the ultrasonic transceiver layer and a high-impedance layer proximate the frequency-splitting layer. The frequency-splitting layer may reside between the ultrasonic transceiver layer and the high-impedance layer. The high-impedance layer may have a higher acoustic impedance than the frequency-splitting layer.

Multiple-frequency ultrasonic sensor system

An apparatus may include an ultrasonic sensor system, a Coulomb force apparatus and a control system. The control system may be configured for controlling the Coulomb force apparatus for application of a Coulomb force to a digit in contact with an outer surface of the apparatus in a fingerprint sensor area and for controlling the ultrasonic fingerprint sensor for transmission of first ultrasonic waves towards the digit. The control system may be configured for synchronizing the application of the Coulomb force and the transmission of the first ultrasonic waves. The control system may be configured for receiving ultrasonic receiver signals from the ultrasonic fingerprint sensor and for performing an authentication process based, at least in part, on the ultrasonic receiver signals. The ultrasonic receiver signals may, in some instances, include signals corresponding to reflections of the first ultrasonic waves from the digit.

Device including an ultrasonic fingerprint sensor and a coulomb force apparatus

An apparatus may include an ultrasonic sensor system, a low-frequency vibration source and a control system. The ultrasonic sensor system may include an ultrasonic receiver and an ultrasonic transmitter configured for transmitting ultrasonic waves in a first frequency range (e.g., 1 MHz to 30 MHz). The low-frequency vibration source may be configured for generating low-frequency vibrations in a second frequency range (e.g., the range of 5 Hz to 2000 Hz). The control system may be configured for synchronizing the generation of the first low-frequency vibrations and the transmission of the first ultrasonic waves.

Ultrasonic fingerprint sensor with low-frequency vibration source

An ultrasonic fingerprint sensor system of the present disclosure may be provided with a flexible substrate. The ultrasonic fingerprint sensor system may include a film stack disposed on the flexible substrate that provides acceptable acoustic coupling for fingerprint sensing. The ultrasonic fingerprint sensor system includes a high acoustic impedance layer in an acoustic path of ultrasonic waves through a display. The high acoustic impedance layer can be electrically conductive or electrically nonconductive. In some implementations, the ultrasonic fingerprint sensor system includes an ultrasonic transceiver or an ultrasonic transmitter separate from an ultrasonic receiver.

Ultrasonic fingerprint sensor with flexible substrate

An apparatus may include a cover layer, a layer of first metamaterial proximate (or in) the cover layer, a light source system configured for providing light to the layer of first metamaterial and a receiver system. The first metamaterial may include nanoparticles configured to create ultrasonic waves when illuminated by light. The receiver system may include an ultrasonic receiver system configured to receive ultrasonic waves reflected from a target object in contact with, or proximate, a surface of the cover layer. The control system may be configured to receive ultrasonic receiver signals from the ultrasonic receiver system corresponding to the ultrasonic waves reflected from the target object and to perform an authentication process and/or an imaging process that is based, at least in part, on the ultrasonic receiver signals.

Fingerprint sensor system including metamaterial

Disclosed are methods, devices, apparatuses, and systems for poling a piezoelectric film. A poling system can be a corona poling system including a corona source with one or more corona wires configured to transfer a corona discharge onto a major surface of the piezoelectric film. The poling system can further include a grid electrode interposed between the corona source and the piezoelectric film. A substrate including the piezoelectric film may be supported on a substrate support, where the substrate and the corona source are configured to move relative to each other during poling.

Apparatus and method for poling a piezoelectric film

A fingerprint sensor device includes a sensor substrate, a plurality of sensor circuits over a first surface of the sensor substrate, and a transceiver layer located over the plurality of sensor circuits and the first surface of the sensor substrate. The transceiver layer includes a piezoelectric layer and a transceiver electrode positioned over the piezoelectric layer. The piezoelectric layer and the transceiver electrode are configured to generate one or more ultrasonic waves or to receive one or more ultrasonic waves. The fingerprint sensor device may include a cap coupled to the sensor substrate and a cavity formed between the cap and the sensor substrate. The cavity and the sensor substrate may form an acoustic barrier.

Fingerprint sensor device and methods thereof

Techniques described herein address these and other issues by providing an under-display sensor capable of providing fingerprint scanning over an entire display using optical and/or ultrasonic means. To do so, the sensor comprises an array of pixels, where each can pixel comprises a piezoelectric sensor element and a diode capable of being used as a photodetector during a light-sensing mode, and as a peak detector during a pressure-sensing mode. The sensor may further comprise a piezoelectric layer and one or more electrodes, which can generate a pressure wave during the pressure sensing mode.

Multifunctional, multimodal, under-display sensor

An ultrasonic fingerprint sensor system of the present disclosure may be provided with a thick electrically nonconductive acoustic layer and thin electrode layer coupled to a piezoelectric layer of an ultrasonic transmitter or transceiver. The thick electrically nonconductive acoustic layer may have a high density or high acoustic impedance value, and may be adjacent to the piezoelectric layer. The thin electrode layer may be divided into electrode segments. The ultrasonic fingerprint sensor system may use flexible or rigid substrates, and may use an ultrasonic transceiver or an ultrasonic transmitter separate from an ultrasonic receiver.

Ultrasonic fingerprint sensor with electrically nonconductive acoustic layer

An ultrasonic fingerprint sensor system of the present disclosure may be provided with an ultrasonic transmitter or ultrasonic transceiver having an electrode layer divided into a plurality of electrode segments. The ultrasonic fingerprint sensor system may detect an object over one or more electrode segments and provide a voltage burst to one or more selected electrode segments for localized generation of ultrasonic waves. The localized generation of ultrasonic waves may facilitate localized readout for imaging. In some implementations, the voltage burst may be provided in a single-ended drive scheme or differential drive scheme.

Module architecture for large area ultrasonic fingerprint sensor

Growing community of inventors

San Jose, CA, United States of America

Nicholas Ian Buchan