Patents by Inventor David W. Ritter
David W. Ritter 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: 20210359556Abstract: A wireless charging mat and method of operating the same. The wireless charging mat includes a detection system configured to determine a location and an orientation of an electronic device on the wireless charging mat. The location and orientation are determined based on detected locations of one or more structural features of the electronic device. The wireless charging mat is operated according to the detected location and orientation.Type: ApplicationFiled: July 29, 2021Publication date: November 18, 2021Inventors: Chad A. Bossetti, Christopher S. Graham, David W. Ritter, Todd K. Moyer, Steven G. Herbst, Shimon Elkayam, Nileshbhai J. Shah, Stephen C. Terry, Zaki Moussaoui
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Patent number: 11159065Abstract: A wireless charging mat and method of operating the same. The wireless charging mat includes a detection system configured to determine a location and an orientation of an electronic device on the wireless charging mat. The location and orientation are determined based on detected locations of one or more structural features of the electronic device. The wireless charging mat is operated according to the detected location and orientation.Type: GrantFiled: September 20, 2017Date of Patent: October 26, 2021Assignee: Apple Inc.Inventors: Chad A. Bossetti, Christopher S. Graham, David W. Ritter, Todd K. Moyer, Steven G. Herbst, Shimon Elkayam, Nileshbhai J. Shah, Stephen C. Terry, Zaki Moussaoui
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Patent number: 10720789Abstract: A wireless charging system including a transmitter and a receiver. The transmitter is formed of a coil of wire that includes a first loop portion, a second loop portion, and a crossing portion. The crossing portion electrically couples the first loop portion and the second loop portion such that when current is generated in the coil, electrical current flows through the first loop portion in a different rotational direction than in the second loop portion. The receiver is formed of a ferromagnetic core and multiple (e.g., three) coils disposed about the ferromagnetic core. Each coil may be disposed about a different axis of the core such that current may be induced in at least one of the coils by a magnetic field in any direction.Type: GrantFiled: March 22, 2019Date of Patent: July 21, 2020Assignee: Apple Inc.Inventors: David W. Ritter, David B. Kosecoff, David S. Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft, Aditya Rao, Ariadne Smith
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Patent number: 10593291Abstract: An electronic device may be provided with a color sensing ambient light sensor. The color sensing ambient light sensor may measure the color of ambient light. Control circuitry in the electronic device may use information from the color sensing ambient light sensor in adjusting a display in the electronic device or taking other action. The color sensing ambient light sensor may have light detectors with different spectral responses. A test system may be used to calibrate the color sensing light sensor. The test system may have a tunable light source with light-emitting diodes that are turned on in sequence while gathering measured responses from the detectors. Numerical optimization techniques may be used to produce final versions of the spectral responses for the light detectors from the measured responses and corresponding calibration data that is stored in the electronic device.Type: GrantFiled: September 17, 2015Date of Patent: March 17, 2020Assignee: Apple Inc.Inventors: Zhang Jia, Amy M. Winkler, Christopher S. Erickson, Zhen Zhang, David W. Ritter
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Publication number: 20190222052Abstract: A wireless charging system including a transmitter and a receiver. The transmitter is formed of a coil of wire that includes a first loop portion, a second loop portion, and a crossing portion. The crossing portion electrically couples the first loop portion and the second loop portion such that when current is generated in the coil, electrical current flows through the first loop portion in a different rotational direction than in the second loop portion. The receiver is formed of a ferromagnetic core and multiple (e.g., three) coils disposed about the ferromagnetic core. Each coil may be disposed about a different axis of the core such that current may be induced in at least one of the coils by a magnetic field in any direction.Type: ApplicationFiled: March 22, 2019Publication date: July 18, 2019Applicant: Apple Inc.Inventors: David W. Ritter, David B. Kosecoff, David S. Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft, Aditya Rao, Ariadne Smith
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Patent number: 10333333Abstract: A wireless charging table comprising a table top having an upper surface upon which one or more electronic devices can be placed, a wireless charging transmitter positioned under the upper surface of the table top, the wireless charging transmitter comprising a plurality of transmitter coils that define a charging region at the upper surface of the table top, and a power distribution system operatively coupled to the wireless charging transmitter, the power distribution system configured to receive power from an alternating current (AC) power source and distribute power to the wireless charging transmitter. The plurality of transmitter coils include at least a first transmitter coil comprising: a first loop portion; a second loop portion; and a crossing portion comprising overlapping conductive paths that electrically couple the first loop portion.Type: GrantFiled: June 16, 2016Date of Patent: June 25, 2019Assignee: Apple Inc.Inventors: David W. Ritter, David B. Kosecoff, David S. Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft, Aditya Rao, Ariadne Smith
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Publication number: 20190190324Abstract: A wireless charging mat and method of operating the same. The wireless charging mat includes a detection system configured to determine a location and an orientation of an electronic device on the wireless charging mat. The location and orientation are determined based on detected locations of one or more structural features of the electronic device. The wireless charging mat is operated according to the detected location and orientation.Type: ApplicationFiled: September 20, 2017Publication date: June 20, 2019Inventors: Chad A. Bossetti, Christopher S. Graham, David W. Ritter, Todd K. Moyer, Steven G. Herbst, Shimon Elkayam, Nileshbhai J. Shah, Stephen C. Terry, Zaki Moussaoui
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Patent number: 10277056Abstract: A wireless charging system including a transmitter and a receiver. The transmitter is formed of a coil of wire that includes a first loop portion, a second loop portion, and a crossing portion. The crossing portion electrically couples the first loop portion and the second loop portion such that when current is generated in the coil, electrical current flows through the first loop portion in a different rotational direction than in the second loop portion. The receiver is formed of a ferromagnetic core and multiple (e.g., three) coils disposed about the ferromagnetic core. Each coil may be disposed about a different axis of the core such that current may be induced in at least one of the coils by a magnetic field in any direction.Type: GrantFiled: June 16, 2016Date of Patent: April 30, 2019Assignee: Apple Inc.Inventors: David W. Ritter, David B. Kosecoff, David S. Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft, Aditya Rao, Ariadne Smith
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Publication number: 20190089183Abstract: Methods and apparatuses for communicating across an inductive charging interface. Methods and apparatuses for improved efficiency of power transfer across an inductive charging interface.Type: ApplicationFiled: September 30, 2014Publication date: March 21, 2019Inventors: Jeffrey M. Alves, Jeffrey J. Terlizzi, Todd K. Moyer, Steven G. Herbst, David W. Ritter, Chad Bossetti, Terry Tikalsky
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Patent number: 10116279Abstract: Methods and apparatuses for improved efficiency of power transfer across an inductive charging interface by adaptively changing the impedance of the receive coil in response to changes in load conditions during inductive power transfer are disclosed.Type: GrantFiled: February 23, 2015Date of Patent: October 30, 2018Assignee: Apple Inc.Inventors: David W. Ritter, Jeffrey J. Terlizzi, Todd K. Moyer, Jeffrey M. Alves, Steven G. Herbst
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Patent number: 10031078Abstract: A system and method for identifying a position of a moving object, regardless of static objects present in the optical field of an active infrared (IR) proximity detector, is provided. Moreover, a modulated light emitting diode (LED) signal is captured and processed through I/Q demodulation. Specifically, the reflections received at an IR sensor are demodulated to generate in-phase (I) and quadrature phase (Q) signals and the derivative of I/Q signals is obtained to isolate motion. For example, an I/Q domain differentiator or a high pass filter is employed to calculate the derivative, which actively remove the effects of all forms of static interference. Further, the phase of the derivative I/Q signals is determined and is utilized to reconstruct the distance at which the motion occurred.Type: GrantFiled: June 4, 2014Date of Patent: July 24, 2018Assignee: INTERSIL AMERICAS LLCInventors: David W. Ritter, Itaru Hiromi
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Patent number: 9923383Abstract: A receiver device in a coupled coil system for wireless energy transfer includes a receiver coil and a load device operatively connected to the receiver coil and configured to receive a signal from the receiver coil. As one example, the load device is a rechargeable battery. An adjusting filter is included in the receiver device and is operatively connected between the receiver coil and the load device. The adjusting filter can be used to transform the effective resistance or impedance of the load as presented to the transformer during energy transfer so that the effective resistant or impedance of the load is maintained at a substantially constant level, and the signal received by the load device is maintained at a substantially constant level.Type: GrantFiled: February 20, 2015Date of Patent: March 20, 2018Assignee: Apple Inc.Inventors: David W. Ritter, Jeffrey M Alves, Todd K. Moyer, Steven G. Herbst
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Patent number: 9837866Abstract: In an inductive energy transfer system, the phase of a signal that is applied to a transmitter coil to transfer energy is adjusted while energy is transferred from the transmitter device to a receiver device. The phase of the signal can be adjusted by changing a state of a DC-to-AC converter from a converting state to a non-converting state. The DC-to-AC converter outputs a signal that is applied to the transmitter coil when the DC-to-AC converter is in a converting state. A signal is not applied to the transmitter coil when the DC-to-AC converter is in a non-converting state.Type: GrantFiled: September 30, 2014Date of Patent: December 5, 2017Assignee: Apple Inc.Inventors: Todd K. Moyer, Jeffrey M. Alves, Steven G. Herbst, David W. Ritter, Jeffrey J. Terlizzi
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Patent number: 9813041Abstract: Wireless power transfer systems having improved power transfer efficiency are disclosed. A wireless power receiver may include an automatic impedance regulator that adjusts the effective input impedance of the receiver depending upon the power requirements of the receiver. For example, in certain embodiments, the impedance regulator is a boost converter. The boost converter may exploit the leakage inductance of the receive coil to boost the voltage output from the terminals of the receive coil. The effective input impedance may be substantially matched to the output impedance of the transmitter.Type: GrantFiled: July 31, 2014Date of Patent: November 7, 2017Assignee: Apple Inc.Inventor: David W. Ritter
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Publication number: 20170084250Abstract: An electronic device may be provided with a color sensing ambient light sensor. The color sensing ambient light sensor may measure the color of ambient light. Control circuitry in the electronic device may use information from the color sensing ambient light sensor in adjusting a display in the electronic device or taking other action. The color sensing ambient light sensor may have light detectors with different spectral responses. A test system may be used to calibrate the color sensing light sensor. The test system may have a tunable light source with light-emitting diodes that are turned on in sequence while gathering measured responses from the detectors. Numerical optimization techniques may be used to produce final versions of the spectral responses for the light detectors from the measured responses and corresponding calibration data that is stored in the electronic device.Type: ApplicationFiled: September 17, 2015Publication date: March 23, 2017Inventors: Zhang Jia, Amy M. Winkler, Christopher S. Erickson, Zhen Zhang, David W. Ritter
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Publication number: 20160372961Abstract: A wireless charging table comprising a table top having an upper surface upon which one or more electronic devices can be placed, a wireless charging transmitter positioned under the upper surface of the table top, the wireless charging transmitter comprising a plurality of transmitter coils that define a charging region at the upper surface of the table top, and a power distribution system operatively coupled to the wireless charging transmitter, the power distribution system configured to receive power from an alternating current (AC) power source and distribute power to the wireless charging transmitter. The plurality of transmitter coils include at least a first transmitter coil comprising: a first loop portion; a second loop portion; and a crossing portion comprising overlapping conductive paths that electrically couple the first loop portion.Type: ApplicationFiled: June 16, 2016Publication date: December 22, 2016Applicant: Apple Inc.Inventors: David W. Ritter, David B. Kosecoff, David S. Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft, Aditya Rao, Ariadne Smith
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Publication number: 20160372960Abstract: A wireless charging system including a transmitter and a receiver. The transmitter is formed of a coil of wire that includes a first loop portion, a second loop portion, and a crossing portion. The crossing portion electrically couples the first loop portion and the second loop portion such that when current is generated in the coil, electrical current flows through the first loop portion in a different rotational direction than in the second loop portion. The receiver is formed of a ferromagnetic core and multiple (e.g., three) coils disposed about the ferromagnetic core. Each coil may be disposed about a different axis of the core such that current may be induced in at least one of the coils by a magnetic field in any direction.Type: ApplicationFiled: June 16, 2016Publication date: December 22, 2016Applicant: Apple Inc.Inventors: David W. Ritter, David B. Kosecoff, David S. Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft, Aditya Rao, Ariadne Smith
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Publication number: 20160094074Abstract: Methods and apparatuses for communicating across an inductive charging interface. Methods and apparatuses for improved efficiency of power transfer across an inductive charging interface.Type: ApplicationFiled: September 30, 2014Publication date: March 31, 2016Inventors: Jeffrey M. Alves, Jeffrey J. Terlizzi, Todd K. Moyer, Steven G. Herbst, David W. Ritter, Chad Bossetti, Terry Tikalsky
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Patent number: 9250714Abstract: Described herein are optical proximity detectors, methods for use therewith, and systems including an optical proximity detector. Such optical proximity detectors include an analog front-end and a digital back-end. In certain embodiments, the digital back-end includes a dynamic gain and phase offset corrector, a cross-talk corrector, a phase and magnitude calculator, and a static phase offset corrector. The dynamic gain and phase offset corrector corrects for dynamic variations in gain and phase offset of the analog front-end due to changes in temperature and/or operating voltage levels. The crosstalk corrector corrects for electrical and/or optical crosstalk associated with the analog front-end. The phase and magnitude calculator calculates phase and magnitude values in dependence on the corrected versions of digital in-phase and quadrature-phase signals received from the analog front-end. The static phase offset corrector corrects for a static phase offset of the optical proximity detector.Type: GrantFiled: September 24, 2014Date of Patent: February 2, 2016Assignee: INTERSIL AMERICAS LLCInventors: Itaru Hiromi, Philip V. Golden, David W. Ritter, Pradeep Bhardwaj, Steven Herbst, Warren Craddock
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Publication number: 20150244341Abstract: Methods and apparatuses for improved efficiency of power transfer across an inductive charging interface by adaptively changing the impedance of the receive coil in response to changes in load conditions during inductive power transfer are disclosed.Type: ApplicationFiled: February 23, 2015Publication date: August 27, 2015Inventors: David W. Ritter, Jeffrey J. Terlizzi, Todd K. Moyer, Jeffrey M. Alves, Steven G. Herbst