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公开(公告)号：US11798307B2
公开(公告)日：2023-10-24
申请号：US17446436
申请日：2021-08-30
发明人： Shiang-Chi Lin , Hrishikesh Vijaykumar Panchawagh , Jessica Liu Strohmann , Yipeng Lu , Chin-Jen Tseng , Kostadin Dimitrov Djordjev , Min-Lun Yang , Chia-Wei Yang
CPC分类号： G06V40/1306 , G01S7/52079 , G06F21/32
摘要： 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.
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公开(公告)号：US11430249B2
公开(公告)日：2022-08-30
申请号：US16427165
申请日：2019-05-30
发明人： Soon Joon Yoon , Hrishikesh Vijaykumar Panchawagh , Jessica Liu Strohmann , Kostadin Dimitrov Djordjev
摘要： An acoustic receiver system may be configured for receiving dynamic friction acoustic waves produced via relative motion between an outer surface of an apparatus and a target object in contact with the outer surface. A control system may be configured for receiving acoustic signals from the acoustic receiver system. The acoustic signals may correspond to a first instance of the dynamic friction acoustic waves. The control system may be configured for extracting target object features from the first acoustic signals and for performing an authentication process based, at least in part, on the target object features.
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公开(公告)号：US20200380232A1
公开(公告)日：2020-12-03
申请号：US16427165
申请日：2019-05-30
发明人： Soon Joon Yoon , Hrishikesh Vijaykumar Panchawagh , Jessica Liu Strohmann , Kostadin Dimitrov Djordjev
摘要： An acoustic receiver system may be configured for receiving dynamic friction acoustic waves produced via relative motion between an outer surface of an apparatus and a target object in contact with the outer surface. A control system may be configured for receiving acoustic signals from the acoustic receiver system. The acoustic signals may correspond to a first instance of the dynamic friction acoustic waves. The control system may be configured for extracting target object features from the first acoustic signals and for performing an authentication process based, at least in part, on the target object features.
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公开(公告)号：US20200272255A1
公开(公告)日：2020-08-27
申请号：US16283620
申请日：2019-02-22
IPC分类号： G06F3/0354 , G06F3/041 , G06F3/038
摘要： A stylus-tracking device may include a piezoelectric receiver or transceiver array on a first side (e.g., underneath) a display. Image data may be acquired from the piezoelectric receiver array. The image data may correspond to signals produced by the piezoelectric receiver array in response to an acoustic signal and/or a mechanical deformation caused by a target object (e.g., a stylus) in contact with a surface, such as a cover glass, proximate a second side of the display. A doublet pattern in the image data may include a first area of having signals below a threshold level and a second area having signals above the threshold level. Based on one or more doublet pattern characteristics, a position of the target object on the surface, a force of the target object on the surface and/or a first direction of movement of the target object relative to the surface may be estimated.
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公开(公告)号：US20180373913A1
公开(公告)日：2018-12-27
申请号：US16006640
申请日：2018-06-12
发明人： Hrishikesh Vijaykumar Panchawagh , Ila Ravindra Badge , Yipeng Lu , Kostadin Dimitrov Djordjev , Suryaprakash Ganti , Chin-Jen Tseng , Nicholas Ian Buchan , Tsongming Kao , Leonard Eugene Fennell , Firas Sammoura , Jessica Liu Strohmann , David William Burns
摘要： 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.
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公开(公告)号：US10127425B2
公开(公告)日：2018-11-13
申请号：US15404893
申请日：2017-01-12
IPC分类号： G06K9/00
摘要： This disclosure provides systems, methods and apparatus for a controller configured to switch operation of a fingerprint sensor among operational modes. In one aspect, a fingerprint sensor may switch from operating in a first operational mode to a second operational mode based on one or more characteristics of fingerprint image data generated with the fingerprint sensor operating in the first operational mode. One of the first operational mode or the second operational mode may be a capacitive sensing mode, and the other may be an ultrasonic sensing mode.
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公开(公告)号：US20170110504A1
公开(公告)日：2017-04-20
申请号：US15292057
申请日：2016-10-12
发明人： Hrishikesh Vijaykumar Panchawagh , Suryaprakash Ganti , Kostadin Dimitrov Djordjev , David William Burns , Timothy Alan Dickinson , Donald William Kidwell, JR. , Ravindra Vaman Shenoy , Jon Bradley Lasiter , Hao-Yen Tang , Yipeng Lu
IPC分类号： H01L27/20 , H01L27/12 , G06F3/043 , G01S7/52 , G06K9/00 , H01L41/113 , H01L41/311
CPC分类号： H01L27/20 , B06B1/0207 , B06B1/0607 , G01S7/52028 , G06F3/0436 , G06K9/0002 , H01L27/1214 , H01L41/311
摘要： An ultrasonic sensor pixel includes a substrate, a piezoelectric micromechanical ultrasonic transducer (PMUT) and a sensor pixel circuit. The PMUT includes a piezoelectric layer stack including a piezoelectric layer disposed over a cavity, the cavity being disposed between the piezoelectric layer stack and the substrate, a reference electrode disposed between the piezoelectric layer and the cavity, and one or both of a receive electrode and a transmit electrode disposed on or proximate to a first surface of the piezoelectric layer, the first surface being opposite from the cavity. The sensor pixel circuit is electrically coupled with one or more of the reference electrode, the receive electrode and the transmit electrode and the PMUT and the sensor pixel circuit are integrated with the sensor pixel circuit on the substrate.
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公开(公告)号：US20160350573A1
公开(公告)日：2016-12-01
申请号：US15115058
申请日：2015-03-05
发明人： Jack Conway Kitchens, II , John Keith Schneider , Ashish Hinger , Ranjith Ranganathan , Nai-Kuei Kuo , Kostadin Dimitrov Djordjev , Stephen Michael Gojevic , David William Burns , Nao Sugawara Chuei , Eliza Yingzi Du , Ming Yu Chen , Kwokleung Chan , Jin Gu , Esra Vural
CPC分类号： G06K9/0002 , G01S15/8952 , G06K9/00067 , G06K9/00114 , G06K9/6289
摘要： Systems and methods for multi-spectral ultrasonic imaging are disclosed. In one embodiment, a finger is scanned at a plurality of ultrasonic scan frequencies. Each scan frequency provides an image information set describing a plurality of pixels of the finger including a signal-strength indicating an amount of energy reflected from a surface of a platen on which a finger is provided. For each of the pixels, the pixel output value corresponding to each of the scan frequencies is combined to produce a combined pixel out put value for each pixel. Systems and methods for improving the data capture of multi-spectral ultrasonic imaging are also disclosed.
摘要翻译： 公开了用于多光谱超声成像的系统和方法。 在一个实施例中，以多个超声波扫描频率扫描手指。 每个扫描频率提供描述手指的多个像素的图像信息集，其包括指示从其上提供手指的台板的表面反射的能量的信号强度。 对于每个像素，对应于每个扫描频率的像素输出值被组合以产生每个像素的组合像素输出值。 还公开了用于改进多光谱超声成像的数据捕获的系统和方法。
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公开(公告)号：US11798308B2
公开(公告)日：2023-10-24
申请号：US17448037
申请日：2021-09-17
发明人： Jessica Liu Strohmann , Hrishikesh Vijaykumar Panchawagh , Nai-Kuei Kuo , Yipeng Lu , Ali Lopez , Kostadin Dimitrov Djordjev
CPC分类号： G06V40/1306 , B06B1/0688 , H10K59/65 , B06B2201/70
摘要： Some disclosed implementations include an ultrasonic sensor stack and an acoustic resonator. The acoustic resonator may be configured to enhance ultrasonic waves transmitted by the ultrasonic sensor stack in an ultrasonic frequency range that is suitable for ultrasonic fingerprint sensors. In some examples, the acoustic resonator may include one or more low-impedance layers residing between a first higher-impedance layer and a second higher-impedance layer. Each of the one or more low-impedance layers may have a lower acoustic impedance than an acoustic impedance of the first higher-impedance layer or an acoustic impedance of the second higher-impedance layer. At least one low-impedance layer may have a thickness corresponding to a multiple of a half wavelength at a peak frequency of the acoustic resonator. The peak frequency may be within a frequency range from 1 MHz. to 20 MHz.
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公开(公告)号：US11436857B1
公开(公告)日：2022-09-06
申请号：US17446438
申请日：2021-08-30
发明人： Jessica Liu Strohmann , Yipeng Lu , Hrishikesh Vijaykumar Panchawagh , Kostadin Dimitrov Djordjev
摘要： An apparatus may include an ultrasonic sensor system having an ultrasonic transceiver layer, a thin-film transistor (TFT) layer and a frequency-differentiating layer. In some examples, the frequency-differentiating layer may include a first frequency-differentiating layer area corresponding to a lower-frequency area of the ultrasonic sensor system. The first frequency-differentiating layer area may include a first material having a first acoustic impedance. In some such examples, the frequency-differentiating layer may include a second frequency-differentiating layer area corresponding to a higher-frequency area of the ultrasonic sensor system. The second frequency-differentiating layer area may include a second material having a second acoustic impedance. The first acoustic impedance may, for example, be higher than the second acoustic impedance.
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