Patents by Inventor Kostadin Dimitrov Djordjev
Kostadin Dimitrov Djordjev has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220198172Abstract: Various aspects of the present disclosure relate generally to ultrasonic fingerprint sensor. In some aspects, a device may include a flexible display. The device may include an ultrasonic fingerprint sensor that is configured to transmit and receive an ultrasonic signal in an acoustic path through the flexible display. The device may include an acoustics configuration layer that is situated between the display and the ultrasonic fingerprint sensor. The acoustics configuration layer may be configured to optimize a signal strength of the ultrasonic signal based at least in part on a configuration of one or more layers of the flexible display.Type: ApplicationFiled: December 21, 2020Publication date: June 23, 2022Inventors: Jessica Liu STROHMANN, Hrishikesh Vijaykumar PANCHAWAGH, Yipeng LU, Chin-Jen TSENG, Kostadin Dimitrov DJORDJEV
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Patent number: 11346927Abstract: Techniques for operating an ultrasonic sensor array, the ultrasonic sensor array disposed under a platen, include: making a determination whether or not to recalibrate the ultrasonic sensor array based on whether a first screen protector disposed above the platen has been removed or replaced by a second screen protector; and recalibrating the ultrasonic sensor array, when the determination is to recalibrate the ultrasonic sensor array. In some cases, the techniques include prompting a user to indicate whether or not the screen protector has been changed or removed, and recalibrating the ultrasonic sensor array only after confirmation from the user.Type: GrantFiled: May 16, 2019Date of Patent: May 31, 2022Assignee: QUALCOMM IncorporatedInventors: Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, Jessica Liu Strohmann, Kostadin Dimitrov Djordjev
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Patent number: 11335114Abstract: Some disclosed methods involve acquiring, via an ultrasonic sensor system, first (reference) ultrasonic signals at a first time and acquiring second ultrasonic signals via the ultrasonic sensor system at a second time. Such methods may involve determining, based at least in part on a comparison of the first ultrasonic signals and the second ultrasonic signals, whether one or more layers reside on the cover glass at the second time. If it is determined that the one or more layers reside on the cover glass at the second time, some methods may involve determining one or more signal characteristics corresponding to properties of the one or more layers and determining, based at least in part on the one or more properties, whether the one or more layers are compatible with the ultrasonic sensor system. If so, the method may involve calibrating the ultrasonic sensor system.Type: GrantFiled: August 21, 2020Date of Patent: May 17, 2022Assignee: QUALCOMM IncorporatedInventors: Changting Xu, Soon Joon Yoon, Camilo Perez Saaibi, Hrishikesh Vijaykumar Panchawagh, Kostadin Dimitrov Djordjev
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Publication number: 20220058357Abstract: Some disclosed methods involve acquiring, via an ultrasonic sensor system, first (reference) ultrasonic signals at a first time and acquiring second ultrasonic signals via the ultrasonic sensor system at a second time. Such methods may involve determining, based at least in part on a comparison of the first ultrasonic signals and the second ultrasonic signals, whether one or more layers reside on the cover glass at the second time. If it is determined that the one or more layers reside on the cover glass at the second time, some methods may involve determining one or more signal characteristics corresponding to properties of the one or more layers and determining, based at least in part on the one or more properties, whether the one or more layers are compatible with the ultrasonic sensor system. If so, the method may involve calibrating the ultrasonic sensor system.Type: ApplicationFiled: August 21, 2020Publication date: February 24, 2022Inventors: Changting XU, Soon Joon YOON, Camilo PEREZ SAAIBI, Hrishikesh Vijaykumar PANCHAWAGH, Kostadin Dimitrov DJORDJEV
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Publication number: 20220004728Abstract: 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.Type: ApplicationFiled: July 1, 2020Publication date: January 6, 2022Inventors: Jessica Liu Strohmann, Hrishikesh Vijaykumar Panchawagh, Nicholas Ian Buchan, Yipeng Lu, Kostadin Dimitrov Djordjev
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Publication number: 20210377670Abstract: 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.Type: ApplicationFiled: May 11, 2021Publication date: December 2, 2021Inventors: Jessica Liu STROHMANN, Hrishikesh Vijaykumar PANCHAWAGH, Nicholas Ian BUCHAN, Yipeng LU, Kostadin Dimitrov DJORDJEV
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Patent number: 11126814Abstract: 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.Type: GrantFiled: July 29, 2019Date of Patent: September 21, 2021Assignee: QUALCOMM IncorporatedInventors: Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, Kostadin Dimitrov Djordjev, Jae Hyeong Seo, Nicholas Ian Buchan, Chin-Jen Tseng, Tsongming Kao
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Patent number: 11087109Abstract: A method may involve estimating a force applied by a target object on a surface, determining at least one ultrasonic fingerprint sensor parameter modification based, at least in part, on the force and updating at least one setting of an ultrasonic fingerprint sensor based, at least in part, on the ultrasonic fingerprint sensor parameter modification. The method may involve controlling the ultrasonic fingerprint sensor to transmit first and second ultrasonic waves towards the target object and receiving first and second ultrasonic receiver signals, including signals corresponding to reflections of the first and second ultrasonic waves from the target object, from the ultrasonic fingerprint sensor. The method may involve performing an authentication process based, at least in part, on the first and second ultrasonic receiver signals.Type: GrantFiled: July 27, 2020Date of Patent: August 10, 2021Assignee: QUALCOMM IncorporatedInventors: Jessica Liu Strohmann, Mowen Yang, Jae Hyeong Seo, Jorge Adrian Madrigal Ramirez, Kostadin Dimitrov Djordjev
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Patent number: 11087107Abstract: A device and method for producing said device comprising an improved ultrasonic biometric sensor is disclosed. The ultrasonic biometric sensor is composed of a pixel array and multiple copolymer layers which are polarized in such a fashion as to increase the transmitting pressure and receiving sensitivity of the sensor. The copolymer layers may be polarized in the same direction, or in opposite directions, depending on the desired functionality.Type: GrantFiled: August 20, 2019Date of Patent: August 10, 2021Assignee: QUALCOMM IncorporatedInventors: Jessica Liu Strohmann, Hrishikesh Vijaykumar Panchawagh, Yipeng Lu, Soon Joon Yoon, Kostadin Dimitrov Djordjev
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Patent number: 11062010Abstract: A method may involve controlling an apparatus to transmit a first ultrasonic wave by sending first electrical signals to a plurality of separate electrode elements proximate an ultrasonic transceiver layer. The method may involve receiving first electrode layer signals, corresponding to reflections of the first ultrasonic wave, from the electrode layer. The method may involve determining, based on the first electrode layer signals, a location of a target object in contact with the apparatus. The location of the target object may correspond with a proximate electrode element. The method may involve controlling the ultrasonic transceiver layer to transmit a second ultrasonic wave by sending second electrical signals to the proximate electrode element and for receiving receiver pixel signals from at least a portion of the plurality of ultrasonic receiver pixels in an area corresponding with the proximate electrode element.Type: GrantFiled: October 16, 2019Date of Patent: July 13, 2021Assignee: QUALCOMM IncorporatedInventors: Soon Joon Yoon, Changting Xu, Jessica Liu Strohmann, Hrishikesh Vijaykumar Panchawagh, Kostadin Dimitrov Djordjev
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Publication number: 20210150239Abstract: Methods, systems, and devices for anti-spoofing detection are described. The methods, systems, and devices include scanning, by a sensor associated with a device, an object placed within a scanning distance of the sensor, identifying a test signal based on scanning the object, comparing the test signal to a reference signal, identifying a first match between the object and a biometric model based on the comparing, identifying, based on the scanning, a second match between a first biometric pattern associated with the object and a stored second biometric pattern, and enabling access to a secure resource associated with the device based on the first match and the second match.Type: ApplicationFiled: November 15, 2019Publication date: May 20, 2021Inventors: Soon Joon Yoon, Changting Xu, Hrishikesh Panchawagh, Kostadin Dimitrov Djordjev
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Patent number: 11003884Abstract: 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.Type: GrantFiled: February 10, 2017Date of Patent: May 11, 2021Assignee: QUALCOMM IncorporatedInventors: Nicholas Ian Buchan, Mario Francisco Velez, Chin-Jen Tseng, Hrishikesh Vijaykumar Panchawagh, Firas Sammoura, Jessica Liu Strohmann, Kostadin Dimitrov Djordjev, David William Burns, Leonard Eugene Fennell, Jon Gregory Aday
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Publication number: 20210117519Abstract: A method may involve controlling an apparatus to transmit a first ultrasonic wave by sending first electrical signals to a plurality of separate electrode elements proximate an ultrasonic transceiver layer. The method may involve receiving first electrode layer signals, corresponding to reflections of the first ultrasonic wave, from the electrode layer. The method may involve determining, based on the first electrode layer signals, a location of a target object in contact with the apparatus. The location of the target object may correspond with a proximate electrode element. The method may involve controlling the ultrasonic transceiver layer to transmit a second ultrasonic wave by sending second electrical signals to the proximate electrode element and for receiving receiver pixel signals from at least a portion of the plurality of ultrasonic receiver pixels in an area corresponding with the proximate electrode element.Type: ApplicationFiled: October 16, 2019Publication date: April 22, 2021Inventors: Soon Joon Yoon, Changting Xu, Jessica Liu Strohmann, Hrishikesh Vijaykumar Panchawagh, Kostadin Dimitrov Djordjev
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Patent number: 10956709Abstract: A method of controlling an apparatus that includes an ultrasonic sensor system may involve controlling the ultrasonic sensor system to transmit a first ultrasonic compressional wave and receiving first signals from the ultrasonic sensor system. The first signals may include signals corresponding to reflections of the first ultrasonic compressional wave from a target object proximate a surface of the apparatus. The method may involve performing an authentication process based, at least in part, on the first signals. The method may involve controlling the apparatus to transmit a shear wave and receiving second signals from the ultrasonic sensor system. The second signals may include signals corresponding to reflections of the shear wave from the target object. The method may involve performing a spoof detection process based, at least in part, on the second signals.Type: GrantFiled: November 13, 2019Date of Patent: March 23, 2021Assignee: QUALCOMM IncorporatedInventors: Javier Frydman, Lior Maor, Gal Rotem, Changting Xu, Jessica Liu Strohmann, Soon Joon Yoon, Hrishikesh Vijaykumar Panchawagh, Kostadin Dimitrov Djordjev
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Patent number: 10943084Abstract: 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.Type: GrantFiled: July 3, 2019Date of Patent: March 9, 2021Assignee: QUALCOMM IncorporatedInventors: Hrishikesh Vijaykumar Panchawagh, Nicholas Ian Buchan, Kostadin Dimitrov Djordjev
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Publication number: 20210067623Abstract: Various aspects of the present disclosure generally relate to control of a user device under a wet condition. In some aspects, a user device may determine whether the user device is operating under a wet condition; select, based at least in part on whether the user device is operating under the wet condition, a set of input components to control the user device, wherein the set of input components is selected from a plurality of different sets of input components; and configure a user interface of the user device according to the set of input components. Numerous other aspects are provided.Type: ApplicationFiled: January 13, 2020Publication date: March 4, 2021Inventors: Sandeep Louis D'SOUZA, Vadim WINEBRAND, Mohamed AHMED, Syed Fawad AHMAD, Nathan Felix ALTMAN, Suhail JALIL, Livingstone SONG, Raj KUMAR, David CHANDLER, Masoud ROHAM, Xin FAN, Lennart Karl-Axel MATHE, Kostadin Dimitrov DJORDJEV, Deep BHATIA
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Publication number: 20210056277Abstract: A device and method for producing said device comprising an improved ultrasonic biometric sensor is disclosed. The ultrasonic biometric sensor is composed of a pixel array and multiple copolymer layers which are polarized in such a fashion as to increase the transmitting pressure and receiving sensitivity of the sensor. The copolymer layers may be polarized in the same direction, or in opposite directions, depending on the desired functionality.Type: ApplicationFiled: August 20, 2019Publication date: February 25, 2021Inventors: Jessica Liu STROHMANN, Hrishikesh Vijaykumar PANCHAWAGH, Yipeng LU, Soon Joon YOON, Kostadin Dimitrov DJORDJEV
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Patent number: 10929636Abstract: 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.Type: GrantFiled: January 18, 2019Date of Patent: February 23, 2021Assignee: QUALCOMM IncorporatedInventors: Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, Kostadin Dimitrov Djordjev, Chin-Jen Tseng, Nicholas Ian Buchan, Tsongming Kao, Jae Hyeong Seo
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Patent number: 10891458Abstract: 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.Type: GrantFiled: February 28, 2019Date of Patent: January 12, 2021Assignee: QUALCOMM IncorporatedInventors: Jae Hyeong Seo, Kostadin Dimitrov Djordjev, Hrishikesh Vijaykumar Panchawagh, Sameer Wadhwa, Nicholas Ian Buchan, Yipeng Lu
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Publication number: 20210004555Abstract: 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.Type: ApplicationFiled: July 3, 2019Publication date: January 7, 2021Inventors: Hrishikesh Vijaykumar PANCHAWAGH, Nicholas Ian BUCHAN, Kostadin Dimitrov DJORDJEV