Patents by Inventor Dayu Qu
Dayu Qu 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: 20230015526Abstract: An input device for an electronic device includes an enclosure and a top member defining an input surface having multiple differentiated input regions. The input device further includes a first force sensing system associated with a first area of the top member and including a first group of the differentiated input regions, and a second force sensing system associated with a second area of the top member and including a second group of the differentiated input regions. The input device further includes a touch sensing system configured to determine which input region from the first group of the differentiated input regions corresponds to the first force input and to determine which input region from the second group of the differentiated input regions corresponds to the second force input.Type: ApplicationFiled: September 22, 2022Publication date: January 19, 2023Inventors: Alex J. Lehmann, Chang Zhang, Dayu Qu, Kenneth M. Silz, Paul X. Wang, Qiliang Xu, Zheng Gao, Scott J. McEuen, Reza Nasiri Mahalati
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Patent number: 11500538Abstract: An input device for an electronic device includes an enclosure and a top member defining an input surface having multiple differentiated input regions. The input device further includes a first force sensing system associated with a first area of the top member and including a first group of the differentiated input regions, and a second force sensing system associated with a second area of the top member and including a second group of the differentiated input regions. The input device further includes a touch sensing system configured to determine which input region from the first group of the differentiated input regions corresponds to the first force input and to determine which input region from the second group of the differentiated input regions corresponds to the second force input.Type: GrantFiled: August 31, 2017Date of Patent: November 15, 2022Assignee: Apple Inc.Inventors: Alex J. Lehmann, Chang Zhang, Dayu Qu, Kenneth M. Silz, Paul X. Wang, Qiliang Xu, Zheng Gao, Scott J. McEuen, Reza Nasiri Mahalati
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Publication number: 20220321121Abstract: Disclosed herein is an input device having adjustable input mechanisms. The input mechanisms of the input device may be dynamically adjusted based on one or more input characteristics associated with a user. Accordingly, the input device may be customized to fit a user's input preferences.Type: ApplicationFiled: June 14, 2022Publication date: October 6, 2022Inventors: Paul X. Wang, John C. DiFonzo, Dayu Qu, Zheng Gao, Chang Zhang
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Patent number: 11394385Abstract: Disclosed herein is an input device having adjustable input mechanisms. The input mechanisms of the input device may be dynamically adjusted based on one or more input characteristics associated with a user. Accordingly, the input device may be customized to fit a user's input preferences.Type: GrantFiled: February 1, 2017Date of Patent: July 19, 2022Assignee: APPLE INC.Inventors: Paul X. Wang, John C. DiFonzo, Dayu Qu, Zheng Gao, Chang Zhang
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Patent number: 10353485Abstract: Disclosed herein is a multifunction input device, such as, a keyboard. The multifunction input device has a capacitive sensing layer that enables a user to use the multifunction input device as standard keyboard and also as a touch sensitive surface such as, for example, a trackpad.Type: GrantFiled: June 6, 2017Date of Patent: July 16, 2019Assignee: Apple Inc.Inventors: Chang Zhang, Dayu Qu, Golnaz Abdollahian, Paul X. Wang, Ray L. Chang, John Buckmaster
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Patent number: 9952682Abstract: Systems and methods for decoupling the electrical and mechanical functionality of a depressible key are disclosed. The depressible key can include a non-contact proximity sensor, such as an optical sensor, to detect motion of the keycap. The output from the optical sensor is used to determine a distance, velocity, acceleration, and a force applied during a keypress.Type: GrantFiled: April 15, 2015Date of Patent: April 24, 2018Assignee: Apple Inc.Inventors: Chang Zhang, Dayu Qu, Ray L. Chang, John S. Camp
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Publication number: 20180074694Abstract: An input device for an electronic device includes an enclosure and a top member defining an input surface having multiple differentiated input regions. The input device further includes a first force sensing system associated with a first area of the top member and including a first group of the differentiated input regions, and a second force sensing system associated with a second area of the top member and including a second group of the differentiated input regions. The input device further includes a touch sensing system configured to determine which input region from the first group of the differentiated input regions corresponds to the first force input and to determine which input region from the second group of the differentiated input regions corresponds to the second force input.Type: ApplicationFiled: August 31, 2017Publication date: March 15, 2018Inventors: Alex J. Lehmann, Chang Zhang, Dayu Qu, Kenneth M. Silz, Paul X. Wang, Qiliang Xu, Zheng Gao, Scott J. McEuen, Reza Nasiri Mahalati
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Publication number: 20170090655Abstract: A force sensor for detecting a force on a surface of a device. The force sensor may include a force-receiving layer and a substrate disposed below the force-receiving layer. A first force-sensitive component may be disposed on a surface of the substrate, and a second force-sensitive component may be disposed proximate to the first force-sensitive component. In some embodiments, sensor circuitry may be operatively coupled to the first and second force-sensitive components, and configured to compare a relative electrical response between the first force-sensitive component and the second force-sensitive component to compute a force estimate. The force estimate may compensate for a variation in response based on the location of the components relative to a location of the force.Type: ApplicationFiled: September 13, 2016Publication date: March 30, 2017Inventors: Chang Zhang, Dayu Qu, Lei Ma
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Publication number: 20160306437Abstract: Systems and methods for decoupling the electrical and mechanical functionality of a depressible key are disclosed. The depressible key can include a non-contact proximity sensor, such as an optical sensor, to detect motion of the keycap. The output from the optical sensor is used to determine a distance, velocity, acceleration, and a force applied during a keypress.Type: ApplicationFiled: April 15, 2015Publication date: October 20, 2016Inventors: Chang Zhang, Dayu Qu, Ray L. Chang, John S. Camp
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Patent number: 9229500Abstract: Embodiments of the present invention provide an apparatus that reduces an audible noise produced in a power supply. The apparatus includes: (1) a housing; (2) an inductor coil formed from a coil of wire enclosed in the housing; (3) a set of wires that are coupled from the inductor coil to the outside of the housing through corresponding apertures in the housing, comprising electrical leads for the inductor coil; and (4) a predetermined amount of adhesive in the apertures that bonds the wires to the housing to reduce an audible noise produced when the current through the inductor coil is cycled quickly.Type: GrantFiled: February 1, 2011Date of Patent: January 5, 2016Assignee: Apple Inc.Inventor: Dayu Qu
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Patent number: 8151128Abstract: Embodiments of the present invention provide a system that supplies power in a computer system. The system includes a power adapter coupled to a source of electrical power and a set of a set of power consumers coupled to a power bus in the computer system. A full-power mechanism coupled between the power adapter and the power bus supplies power for the power consumers while the computer system is operating in a full-power mode. A low-power mechanism coupled between the power adapter and the power bus in parallel with the power mechanism supplies power for the power consumers while the computer system is in operating in a low-power mode.Type: GrantFiled: October 4, 2007Date of Patent: April 3, 2012Assignee: Apple Inc.Inventor: Dayu Qu
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Publication number: 20110121928Abstract: Embodiments of the present invention provide an apparatus that reduces an audible noise produced in a power supply. The apparatus includes: (1) a housing; (2) an inductor coil formed from a coil of wire enclosed in the housing; (3) a set of wires that are coupled from the inductor coil to the outside of the housing through corresponding apertures in the housing, comprising electrical leads for the inductor coil; and (4) a predetermined amount of adhesive in the apertures that bonds the wires to the housing to reduce an audible noise produced when the current through the inductor coil is cycled quickly.Type: ApplicationFiled: February 1, 2011Publication date: May 26, 2011Applicant: APPLE INC.Inventor: Dayu Qu
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Patent number: 7915987Abstract: Embodiments of the present invention provide an apparatus that reduces an audible noise produced in a power supply. The apparatus includes: (1) a housing; (2) an inductor coil formed from a coil of wire enclosed in the housing; (3) a set of wires that are coupled from the inductor coil to the outside of the housing through corresponding apertures in the housing, comprising electrical leads for the inductor coil; and (4) a predetermined amount of adhesive in the apertures that bonds the wires to the housing to reduce an audible noise produced when the current through the inductor coil is cycled quickly.Type: GrantFiled: October 19, 2007Date of Patent: March 29, 2011Assignee: Apple Inc.Inventor: Dayu Qu
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Publication number: 20090295344Abstract: Embodiments of a power-regulator circuit having two operating modes are described. This power-regulator circuit includes control logic that is configured to select a given operating mode based on a load condition of the power-regulator circuit. During a first operating mode, the control logic provides a first signal that operates the power-regulator circuit as a linear regulator. Moreover, during a second operating mode, the control logic provides a second signal and a third signal that operate the power-regulator circuit as a switch-mode regulator.Type: ApplicationFiled: May 29, 2008Publication date: December 3, 2009Applicant: Apple Inc.Inventor: Dayu Qu
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Publication number: 20090106564Abstract: Embodiments of the present invention provide an apparatus that reduces an audible noise produced in a power supply. The apparatus includes: (1) a housing; (2) an inductor coil formed from a coil of wire enclosed in the housing; (3) a set of wires that are coupled from the inductor coil to the outside of the housing through corresponding apertures in the housing, comprising electrical leads for the inductor coil; and (4) a predetermined amount of adhesive in the apertures that bonds the wires to the housing to reduce an audible noise produced when the current through the inductor coil is cycled quickly.Type: ApplicationFiled: October 19, 2007Publication date: April 23, 2009Applicant: APPLE INC.Inventor: Dayu Qu
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Publication number: 20080307242Abstract: Embodiments of the present invention provide a system that supplies power in a computer system. The system includes a power adapter coupled to a source of electrical power and a set of a set of power consumers coupled to a power bus in the computer system. A full-power mechanism coupled between the power adapter and the power bus supplies power for the power consumers while the computer system is operating in a full-power mode. A low-power mechanism coupled between the power adapter and the power bus in parallel with the power mechanism supplies power for the power consumers while the computer system is in operating in a low-power mode.Type: ApplicationFiled: October 4, 2007Publication date: December 11, 2008Applicant: APPLE INC.Inventor: Dayu Qu
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Patent number: 7075799Abstract: A DC-DC power converter has a transformer with a primary side and secondary side. A first power transistor is coupled between a first end of a first winding of the secondary side and a ground terminal. A second power transistor is coupled between a second end of the first winding and the ground terminal. A first driver transistor is coupled to a gate of the first power transistor, and a second driver transistor is coupled to a gate of the second power transistor. A separate driver winding taken off the secondary side of the transformer controls the gates of the first and second driver transistors. First and second inductors are coupled between the opposite ends of the first winding and an output of the power supply. First and second resistors are coupled between the gates of the first and second driver transistors and the ground terminal, respectively.Type: GrantFiled: November 23, 2004Date of Patent: July 11, 2006Assignee: Power-One, Inc.Inventor: Dayu Qu
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Publication number: 20060109698Abstract: A DC-DC power converter has a transformer with a primary side and secondary side. A first power transistor is coupled between a first end of a first winding of the secondary side and a ground terminal. A second power transistor is coupled between a second end of the first winding and the ground terminal. A first driver transistor is coupled to a gate of the first power transistor, and a second driver transistor is coupled to a gate of the second power transistor. A separate driver winding taken off the secondary side of the transformer controls the gates of the first and second driver transistors. First and second inductors are coupled between the opposite ends of the first winding and an output of the power supply. First and second resistors are coupled between the gates of the first and second driver transistors and the ground terminal, respectively.Type: ApplicationFiled: November 23, 2004Publication date: May 25, 2006Inventor: Dayu Qu
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Patent number: 7034647Abstract: An integrated magnetic assembly that allows the primary and secondary windings of a transformer and a separate inductor winding to be integrated on a unitary magnetic structure is disclosed. The unitary magnetic structure includes first, second, and third legs that are physically connected and magnetically coupled. The primary and secondary windings of the transformer can be formed on the third leg of the unitary magnetic structure. Alternatively, the primary and secondary windings can be split between the first and second legs. Thus, the primary winding includes first and second primary windings disposed on the first and second legs and the secondary winding includes first and second secondary windings disposed on the first and second legs. The inductor winding may also be formed either on the third leg or it may split into first and second inductor windings and disposed on the first and second legs. In addition, one or more legs may include an energy storage component such as an air gap.Type: GrantFiled: October 15, 2002Date of Patent: April 25, 2006Assignee: Northeastern UniversityInventors: Liang Yan, Dayu Qu, Bradley Lehman
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Patent number: 6989612Abstract: A system and method is provided for dynamically controlling output voltage slew rate in a power converter. Preferred embodiments of the present invention operate in accordance with a power converter including at least a slew-rate control lead (a trim lead, a control lead, etc.), an error-amplifier circuit located therein, a slew-rate circuit, and a controller electrically connected to the power converter and adapted to dynamically control the converter's output voltage slew rate through the transmission of a slew-rate signal. In one embodiment of the present invention, the slew-rate circuit is external to the power converter and electrically connected to both a trim lead of the power converter and to the controller. In another embodiment of the present invention, the slew-rate circuit is internal to the power converter and electrically connected to both a control lead of the power converter and to the error-amplifier circuit.Type: GrantFiled: July 1, 2005Date of Patent: January 24, 2006Assignee: Power-One, Inc.Inventors: Lorenzo Anthony Cividino, Dayu Qu