Patents by Inventor Yongjie Jiang
Yongjie Jiang 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: 20240105525Abstract: Test structures and methods of testing pixel driver chip donor wafers are described. In an embodiment, a redistribution layer is formed over a pixel driver chip donor wafer and probed to determine known good dies, followed by removal of the RDL. In other embodiments, test routing is formed in the pixel driver chip using a polycide material or doped region in the semiconductor wafer.Type: ApplicationFiled: July 25, 2023Publication date: March 28, 2024Inventors: Imran Hashim, Xiang Lu, Stanley B. Wang, Xuchun Liu, Mahdi Farrokh Baroughi, Yongjie Jiang, Hopil Bae, Hasan Akyol, Baris Posat, John T. Wetherell, Lei Wu
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Publication number: 20240105089Abstract: Electronic displays and electronic devices including such electronic displays and antennas are provided for improved transmission of signals through circuitry of the electronic display. The electronic display may include multiple power supply tiles that are separated with non-conductive gaps to reduce circulation of eddy currents induced by the transmission signals. Moreover, voltage supply routing paths within the power supply tiles may be grouped to provide non-conductive gaps within the power supply tiles. Accordingly, the antenna may provide the transmission signals through the electronic display with improved efficiency based on reducing surface currents (e.g., eddy currents) on the electronic display.Type: ApplicationFiled: September 19, 2023Publication date: March 28, 2024Inventors: William Matthew Pender Paul, Mario Martinis, Jiayi Jin, Yongjie Jiang, Baris Posat, Mojtaba Fallahpour, Haitao Li, James G. Horiuchi, Giovanni Azzellino, Weijun Yao, Stanley B. Wang, Mahdi Farrokh Baroughi
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Patent number: 11929388Abstract: A display may be formed by an array of light-emitting diodes mounted to the surface of a display substrate. The light-emitting diodes may be inorganic light-emitting diodes formed from separate crystalline semiconductor structures. An array of pixel control circuits may be used to control light emission from the light-emitting diodes. Each pixel control circuit may be configured to control one or more respective passive matrices. To control partial pixel cells in the display, a donor pixel control circuit in a partial pixel cell may control the pixels in a receptor partial pixel cell without a pixel control circuit. To mitigate the size of an inactive area of the display, fanout signal lines for the display may be formed in the light-emitting active area of the display. The fanout signal lines may be formed between a row of pixel control circuits and a bottom edge of the light-emitting active area.Type: GrantFiled: August 24, 2022Date of Patent: March 12, 2024Assignee: Apple Inc.Inventors: Sandeep Chalasani, Steven E Molesa, Anatole Huang, Mahdi Farrokh Baroughi, Xia Li, Yongjie Jiang, Mittul Gupta, Stanley B Wang
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Publication number: 20240012515Abstract: Touch sensitive display technologies (e.g., integrated touch-display pixel-based systems) are evolving to contain more analog and digital circuits inside the panel itself instead of the traditionally simple thin-film transistors. This improves the display characteristics but makes those circuits more vulnerable to the impact of external ESD strikes, which can degrade the user experience. This disclosure describes a series of circuits and techniques to mitigate the impact of these discharges on front of screen artifacts and potential false touches. These circuits and techniques may include: performing configuration-only panel updates independently of the image refresh rate, improving the in-panel memory circuits to make them resistant to unexpected pin toggles via disabling of a write path in response to a read clock, implementing a pin corruption detector and implementing a supply injection detector.Type: ApplicationFiled: June 20, 2023Publication date: January 11, 2024Inventors: Pablo Moreno Galbis, Xiang Lu, Bin Huang, Ling Zhang, Nikhil Acharya, Derek K. Shaeffer, Stanley B. Wang, Yongjie Jiang, Hopil Bae, Jiayi Jin, Ce Zhang, Young Don Bae, Giovanni Azzellino, Wooseung Yang, Mahdi Farrokh Baroughi, Weijun Yao, Rajesh Velayuthan, Eric A. Hildebrandt, Henry C. Jen
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Patent number: 11635778Abstract: A voltage regulator circuit is disclosed. The voltage regulator includes a feedback circuit configured to generate a feedback signal based on a voltage level present on a regulated power supply node. A comparison circuit is arranged to generate an error signal based on the feedback signal and a reference voltage level. A compensation circuit is configured to modify the error signal, based on a routing impedance coupled between the regulated supply voltage node and a load circuit, to generate a control circuit. An output circuit of the voltage regulator is configured to source current to the regulated power supply node based on the control signal.Type: GrantFiled: September 25, 2020Date of Patent: April 25, 2023Assignee: Apple Inc.Inventors: Yongjie Jiang, Pablo Moreno-Galbis, Stanley Bo-Ting Wang
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Publication number: 20230090344Abstract: A display may be formed by an array of light-emitting diodes mounted to the surface of a display substrate. The light-emitting diodes may be inorganic light-emitting diodes formed from separate crystalline semiconductor structures. An array of pixel control circuits may be used to control light emission from the light-emitting diodes. Each pixel control circuit may be conred to control one or more respective passive matrices. To control partial pixel cells in the display, a donor pixel control circuit in a partial pixel cell may control the pixels in a receptor partial pixel cell without a pixel control circuit. To mitigate the size of an inactive area of the display, fanout signal lines for the display may be formed in the light-emitting active area of the display. The fanout signal lines may be formed between a row of pixel control circuits and a bottom edge of the light-emitting active area.Type: ApplicationFiled: August 24, 2022Publication date: March 23, 2023Inventors: Sandeep Chalasani, Steven E Molesa, Anatole Huang, Mahdi Farrokh Baroughi, Xia Li, Yongjie Jiang, Mittul Gupta, Stanley B Wang
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Publication number: 20220100217Abstract: A voltage regulator circuit is disclosed. The voltage regulator includes a feedback circuit configured to generate a feedback signal based on a voltage level present on a regulated power supply node. A comparison circuit is arranged to generate an error signal based on the feedback signal and a reference voltage level. A compensation circuit is configured to modify the error signal, based on a routing impedance coupled between the regulated supply voltage node and a load circuit, to generate a control circuit. An output circuit of the voltage regulator is configured to source current to the regulated power supply node based on the control signal.Type: ApplicationFiled: September 25, 2020Publication date: March 31, 2022Inventors: Yongjie Jiang, Pablo Moreno-Galbis, Stanley Bo-Ting Wang
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Patent number: 11018581Abstract: A converter includes a first circuit. The first circuit includes a first input that receives a power supply signal, a second input that receives a first signal, and a first output that outputs a second signal having an amplitude that is based on a frequency of the first signal. The first signal is based on an error value and a third signal, and the third signal is independent of feedback of the first circuit. The converter also includes a second circuit having a second output coupled to the second input and that outputs the third signal. The second circuit nonlinearly adapts the third signal based on the power supply signal and a reference signal.Type: GrantFiled: March 29, 2018Date of Patent: May 25, 2021Assignee: Avago Technologies International Sales Pte. LimitedInventors: Yongjie Jiang, Kevin Vannorsdel, Jay Ackerman
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Patent number: 10971954Abstract: Systems and methods for object detection are provided. The system includes at least a coil, a small signal generator, a small signal receiver, and a processor. The small signal generator includes a digital-to-analog converter circuit with programmable impedance. The small signal generator is configured to select an output impedance for the digital-to-analog circuit for capacitive sensing or radio-frequency identification (RFID) tag detection; generate a small signal according to the output impedance; and provide the small signal to the coil. The small signal receiver receives the small signal and a response signal associated with the small signal and measures the response signal to generate a measured signal. The processor compares the measured signal with one or more reference signals and performs capacitive sensing and/or detect a RFID tag according to the comparison.Type: GrantFiled: October 26, 2018Date of Patent: April 6, 2021Assignee: Avago Technologies International Sales Pte. LimitedInventors: Yongjie Jiang, Mark Rutherford, John Walley
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Patent number: 10862347Abstract: Systems and methods for object detection are provided. The system includes at least a coil, a main transmit inverter circuit, and one or more circuits. The one or more circuits are configured to generate a small signal, provide the small signal to the coil, receive a response signal, compare the response signal with one or more reference signals, and detect an object according to the comparison. The object is detected without providing a signal from the main transmit/receive inverter circuit to the coil.Type: GrantFiled: October 26, 2018Date of Patent: December 8, 2020Assignee: Avago Technologies International Sales Pte. LimitedInventors: Yongjie Jiang, Mark Rutherford, John Walley
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Patent number: 10775819Abstract: A multi-loop voltage regulator with load tracking compensation includes a first closed-loop feedback network configured to receive a supply voltage from a power supply and drive an output voltage that is smaller than the supply voltage to a load. The multi-loop voltage regulator includes a second closed-loop feedback network connected to the first closed-loop feedback network and configured to regulate the output voltage between a first supply voltage rail and a second supply voltage rail for a given load current, in which the second closed-loop feedback network produces a gain that is greater than that of the first closed-loop feedback network. The multi-loop voltage regulator also includes a load tracking compensation circuit configured to detect a load current, and to increase the gain of the second closed-loop feedback network based on a dominant pole in the second closed-loop feedback network being a function of the detected load current.Type: GrantFiled: January 16, 2019Date of Patent: September 15, 2020Assignee: Avago Technologies International Sales Pte. LimitedInventors: Kevin Roy Vannorsdel, Yongjie Jiang, John Lynn McNitt, Jay Edward Ackerman
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Publication number: 20200225689Abstract: A multi-loop voltage regulator with load tracking compensation includes a first closed-loop feedback network configured to receive a supply voltage from a power supply and drive an output voltage that is smaller than the supply voltage to a load. The multi-loop voltage regulator includes a second closed-loop feedback network connected to the first closed-loop feedback network and configured to regulate the output voltage between a first supply voltage rail and a second supply voltage rail for a given load current, in which the second closed-loop feedback network produces a gain that is greater than that of the first closed-loop feedback network. The multi-loop voltage regulator also includes a load tracking compensation circuit configured to detect a load current, and to increase the gain of the second closed-loop feedback network based on a dominant pole in the second closed-loop feedback network being a function of the detected load current.Type: ApplicationFiled: January 16, 2019Publication date: July 16, 2020Inventors: Kevin Roy VANNORSDEL, Yongjie Jiang, John Lynn McNitt, Jay Edward Ackerman
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Publication number: 20190319492Abstract: Systems and methods for object detection are provided. The system includes at least a coil, a main transmit inverter circuit, and one or more circuits. The one or more circuits are configured to generate a small signal, provide the small signal to the coil, receive a response signal, compare the response signal with one or more reference signals, and detect an object according to the comparison. The object is detected without providing a signal from the main transmit/receive inverter circuit to the coil.Type: ApplicationFiled: October 26, 2018Publication date: October 17, 2019Inventors: Yongjie Jiang, Mark Rutherford, John Walley
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Publication number: 20190319493Abstract: Systems and methods for object detection are provided. The system includes at least a coil, a small signal generator, a small signal receiver, and a processor. The small signal generator includes a digital-to-analog converter circuit with programmable impedance. The small signal generator is configured to select an output impedance for the digital-to-analog circuit for capacitive sensing or radio-frequency identification (RFID) tag detection; generate a small signal according to the output impedance; and provide the small signal to the coil. The small signal receiver receives the small signal and a response signal associated with the small signal and measures the response signal to generate a measured signal. The processor compares the measured signal with one or more reference signals and performs capacitive sensing and/or detect a RFID tag according to the comparison.Type: ApplicationFiled: October 26, 2018Publication date: October 17, 2019Inventors: Yongjie Jiang, Mark Rutherford, John Walley
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Patent number: 10439497Abstract: Methods and apparatus for providing a time-interleaved current-feedback droop function for multiphase buck converters. An example method includes outputting a first control signal to enable a first set of switches corresponding to a first voltage of a first phase from a multiphase converter, the first phase included in a plurality of phases; enabling a first current associated with the first phase to be measured by a sample and hold circuit associated with the first phase; sampling the first current; holding the first current, the first current based on a load current for the first phase of the multiphase converter; and outputting a droop voltage based on a plurality of currents corresponding to the plurality of phases of the multiphase converter, the plurality of currents including the load current for the first phase.Type: GrantFiled: September 28, 2017Date of Patent: October 8, 2019Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Jian-Yi Wu, Yongjie Jiang, Haydar Bilhan, Anthony M. Hill
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Publication number: 20190305679Abstract: A converter includes a first circuit. The first circuit includes a first input that receives a power supply signal, a second input that receives a first signal, and a first output that outputs a second signal having an amplitude that is based on a frequency of the first signal. The first signal is based on an error value and a third signal, and the third signal is independent of feedback of the first circuit. The converter also includes a second circuit having a second output coupled to the second input and that outputs the third signal. The second circuit nonlinearly adapts the third signal based on the power supply signal and a reference signal.Type: ApplicationFiled: March 29, 2018Publication date: October 3, 2019Inventors: Yongjie Jiang, Kevin Vannorsdel, Jay Ackerman
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Publication number: 20180054125Abstract: Methods and apparatus for providing a time-interleaved current-feedback droop function for multiphase buck converters. An example method includes outputting a first control signal to enable a first set of switches corresponding to a first voltage of a first phase from a multiphase converter, the first phase included in a plurality of phases; enabling a first current associated with the first phase to be measured by a sample and hold circuit associated with the first phase; sampling the first current; holding the first current, the first current based on a load current for the first phase of the multiphase converter; and outputting a droop voltage based on a plurality of currents corresponding to the plurality of phases of the multiphase converter, the plurality of currents including the load current for the first phase.Type: ApplicationFiled: September 28, 2017Publication date: February 22, 2018Inventors: Jian-Yi Wu, Yongjie Jiang, Haydar Bilhan, Anthony M. Hill
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Patent number: 9806619Abstract: Methods and apparatus for providing a time-interleaved current-feedback droop function for multiphase buck converters. An example method includes outputting a first control signal to enable a first set of switches corresponding to a first voltage of a first phase from a multiphase converter, the first phase included in a plurality of phases; enabling a first current associated with the first phase to be measured by a sample and hold circuit associated with the first phase; sampling the first current; holding the first current, the first current based on a load current for the first phase of the multiphase converter; and outputting a droop voltage based on a plurality of currents corresponding to the plurality of phases of the multiphase converter, the plurality of currents including the load current for the first phase.Type: GrantFiled: October 26, 2015Date of Patent: October 31, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Jian-Yi Wu, Yongjie Jiang, Haydar Bilhan, Anthony M Hill
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Publication number: 20170025950Abstract: Methods and apparatus for providing a time-interleaved current-feedback droop function for multiphase buck converters. An example method includes outputting a first control signal to enable a first set of switches corresponding to a first voltage of a first phase from a multiphase converter, the first phase included in a plurality of phases; enabling a first current associated with the first phase to be measured by a sample and hold circuit associated with the first phase; sampling the first current; holding the first current, the first current based on a load current for the first phase of the multiphase converter; and outputting a droop voltage based on a plurality of currents corresponding to the plurality of phases of the multiphase converter, the plurality of currents including the load current for the first phase.Type: ApplicationFiled: October 26, 2015Publication date: January 26, 2017Inventors: Jian-Yi Wu, Yongjie Jiang, Haydar Bilhan, Anthony M. Hill
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Patent number: D1020419Type: GrantFiled: July 29, 2022Date of Patent: April 2, 2024Inventor: Yongjie Jiang