Patents by Inventor Lakshman Rathnam
Lakshman Rathnam 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: 20170195806Abstract: Embodiments of the invention include a method of preventing ferrite migration in a hearing aid including an antenna stack and a battery stack wherein the antenna stack sits on the battery stack, the method comprising the steps of: conformally coating the top and sides of the antenna stack using a conformal coating material; and separately coating all the surfaces of the battery stack using a separate material.Type: ApplicationFiled: December 19, 2016Publication date: July 6, 2017Inventors: Andy Atamaniuk, Lakshman Rathnam
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Patent number: 9632597Abstract: A stylus device is disclosed that is capable of changing its output so that it can communicate and function with a multitude of touch controllers of a computing device. In an aspect, the stylus device receives a message including the configuration information from the computing device. The configuration information may include an encoding scheme corresponding to a format for encoding data to be sent to the computing device and an operating frequency. The stylus configures itself in the encoding scheme, and communicates with the computing device using the encoding scheme. For example, the stylus device may encode data using the encoding scheme and send the data at the operating frequency.Type: GrantFiled: June 12, 2014Date of Patent: April 25, 2017Assignee: AMAZON TECHNOLOGIES, INC.Inventors: Kishore Sundara-Rajan, Lakshman Rathnam
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Publication number: 20170095167Abstract: The present invention is directed to a wearable system wherein elements of the system, including various sensors adapted to detect biometric and other data and/or to deliver drugs, are positioned proximal to, on the ear or in the ear canal of a person. In embodiments of the invention, elements of the system are positioned on the ear or in the ear canal for extended periods of time. For example, an element of the system may be positioned on the tympanic membrane of a user and left there overnight, for multiple days, months, or years. Because of the position and longevity of the system elements in the ear canal, the present invention has many advantages over prior wearable biometric and drug delivery devices.Type: ApplicationFiled: September 30, 2016Publication date: April 6, 2017Inventors: William FACTEAU, Brent EDWARDS, Paul RUCKER, Kulbir SANDHU, Cem SHAQUER, Lakshman RATHNAM, Rodney PERKINS
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Publication number: 20170095202Abstract: The present invention is directed to a wearable system wherein elements of the system, including various sensors adapted to detect biometric and other data and/or to deliver drugs, are positioned proximal to, on or in the ear canal of a person. In embodiments of the invention, elements of the system, including drug delivery devices, are positioned on or in the ear canal for extended periods of time. For example, an element of the system may be positioned on the tympanic membrane of a user and left there overnight, for multiple days, months, or years. Because of the position and longevity of the system elements in the ear canal, the present invention has many advantages over prior wearable biometric and drug delivery devices.Type: ApplicationFiled: September 30, 2016Publication date: April 6, 2017Inventors: William FACTEAU, Brent EDWARDS, Paul RUCKER, Kulbir SANDHU, Cem SHAQUER, Lakshman RATHNAM, Rodney PERKINS
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Publication number: 20170010743Abstract: An input device with switchable sensor configurations. In one embodiment, the input device can switch between a sensor configuration in which each of its sensor elements is enabled to sense input and a sensor configuration in which only a subset of its sensor elements are enabled to sense input. In another embodiment, the input device can switch between a sensor configuration in which each of its sensor elements is enabled to sense input and a sensor configuration in which one or more groupings of its sensor elements are enabled to collectively sense input. In a further embodiment, the input device can operate in a detection mode that switches between sensor configurations to determine a position of an input.Type: ApplicationFiled: September 20, 2016Publication date: January 12, 2017Inventors: Joseph R. FISHER, JR., Erturk D. KOCALAR, Rishabh BHARGAVA, Lakshman RATHNAM
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Patent number: 9465472Abstract: A touch-sensitive display for an electronic device may include a touch sensor comprising a low birefringence substrate, ultraviolet (UV) stabilizers, and a metal mesh disposed on at least a portion of the low birefringence substrate. The low birefringence characteristic of the touch sensor substrate causes the touch sensor to exhibit low haze, high transmittance, and substantially no color, which provides improved optical properties over conventional touch sensor substrate materials used with metal mesh film. In some embodiments, the retardation value of the touch sensor substrate may be no greater than about 15 nanometers (nm). Additionally, the UV stabilizers prevent the substrate from yellowing and becoming brittle from exposure to UV radiation.Type: GrantFiled: December 9, 2014Date of Patent: October 11, 2016Assignee: Amazon Technologies, Inc.Inventors: Angeles Marcia Almanza-Workman, Heang Heng, Thiagarajan Marimuthu, Lakshman Rathnam, Krishan Yadav, Jianjun Yang
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Patent number: 9454256Abstract: An input device with switchable sensor configurations. In one embodiment, the input device can switch between a sensor configuration in which each of its sensor elements is enabled to sense input and a sensor configuration in which only a subset of its sensor elements are enabled to sense input. In another embodiment, the input device can switch between a sensor configuration in which each of its sensor elements is enabled to sense input and a sensor configuration in which one or more groupings of its sensor elements are enabled to collectively sense input. In a further embodiment, the input device can operate in a detection mode that switches between sensor configurations to determine a position of an input.Type: GrantFiled: September 5, 2008Date of Patent: September 27, 2016Assignee: Apple Inc.Inventors: Joseph Fisher, Erturk Kocalar, Rishabh Bhargava, Lakshman Rathnam
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Publication number: 20160170250Abstract: An electronic device includes a stack assembly and a cover glass. The stack assembly includes an electronic paper display sub-assembly for rendering content, a front light sub-assembly for illuminating the electronic display sub-assembly, and a capacitive touch sensing sub-assembly for detecting touch inputs. The cover glass includes two apertures for the placement of control buttons for the electronic device. Prior to assembly of the electronic device, the cover glass is strengthened after the two apertures are formed so as to strengthen the interior edges of the apertures.Type: ApplicationFiled: December 11, 2014Publication date: June 16, 2016Inventors: Hany Mounir Ghali, Gregory Turner Witmer, Chin Siong Khor, Anoop Menon, Premal Vinodchandra Parekh, Robert L.D. Zenner, Lakshman Rathnam, Siddharth Gupta, Angeles Marcia Almanza-Workman
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Patent number: 9360696Abstract: An electronic device includes a stack assembly and a cover glass. The stack assembly includes an electronic paper display sub-assembly for rendering content, a front light sub-assembly for illuminating the electronic display sub-assembly, and a capacitive touch sensing sub-assembly for detecting touch inputs. The cover glass includes two apertures for the placement of control buttons for the electronic device. Prior to assembly of the electronic device, the cover glass is strengthened after the two apertures are formed so as to strengthen the interior edges of the apertures.Type: GrantFiled: December 11, 2014Date of Patent: June 7, 2016Assignee: Amazon Technologies, Inc.Inventors: Hany Mounir Ghali, Gregory Turner Witmer, Chin Siong Khor, Anoop Menon, Premal Vinodchandra Parekh, Robert L. D. Zenner, Lakshman Rathnam, Siddharth Gupta, Angeles Marcia Almanza-Workman
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Patent number: 9298324Abstract: Various embodiments provide a capacitive touch input element that is formed of a recess in a substrate. The size and shape of the recess are chosen such that a finger of a user will not contact the bottom or minima point of the recess, thereby, requiring pressure to be applied by the finger in order to make contact. Beneath the substrate is a capacitive sensing electrode designed to concentrate an electric field toward the minima point of the recess such that the finger must make contact with the minima point to effect a change in capacitance causing the capacitive touch element to provide input to an appropriate application.Type: GrantFiled: March 11, 2013Date of Patent: March 29, 2016Assignee: Amazon Technologies, Inc.Inventors: Gabriel Isaiah Rowe, Lakshman Rathnam
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Publication number: 20150363012Abstract: A stylus device is disclosed that is capable of changing its output so that it can communicate and function with a multitude of touch controllers of a computing device. In an aspect, the stylus device receives a message including the configuration information from the computing device. The configuration information may include an encoding scheme corresponding to a format for encoding data to be sent to the computing device and an operating frequency. The stylus configures itself in the encoding scheme, and communicates with the computing device using the encoding scheme. For example, the stylus device may encode data using the encoding scheme and send the data at the operating frequency.Type: ApplicationFiled: June 12, 2014Publication date: December 17, 2015Inventors: Kishore Sundara-Rajan, Lakshman Rathnam
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Patent number: 9035752Abstract: User input is accepted by a force sensing resistor (“FSR”) assembly, a force sensing capacitor (“FSC”) or both. The FSR or FSC assemblies may be located within an input device, such as behind a device exterior, display, and so forth. A force applied to the device exterior proximate to the assembly may result in activation of the assembly. The activation may be processed as input and used to determine and then perform a particular action. The particular action may be based at least in part on a particular portion of the assembly which has been activated, a magnitude of applied force, or both. A haptic output may be provided on activation to provide feedback to a user.Type: GrantFiled: March 11, 2013Date of Patent: May 19, 2015Assignee: Amazon Technologies, Inc.Inventors: Ilya Daniel Rosenberg, Lakshman Rathnam, Nadim Awad, John Aaron Zarraga, David Charles Buuck, Julien George Beguin
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Patent number: 8866780Abstract: A multi-dimensional scroll wheel is disclosed. Scroll wheel circuitry is provided to detect input gestures that traverse the center of the scroll wheel and to detect multi-touch input. The scroll wheel can include a first plurality of sensor elements arranged in a first closed loop and a second plurality of sensor elements arranged in a second closed loop, the first and second closed loops being concentrically arranged about the center of the scroll wheel.Type: GrantFiled: April 8, 2013Date of Patent: October 21, 2014Assignee: Apple Inc.Inventors: Lakshman Rathnam, Louis Bokma, Fletcher Rothkopf, Andrea Mucignat, Erturk Kocalar, Benjamin Lyon, Joseph Fisher
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Patent number: 8816967Abstract: A capacitive sensor may include a flex circuit, a substrate facing the flex circuit, and conductive electrodes configured to sense an input applied to the substrate. At least one of the conductive electrodes is associated with a surface of the substrate and an at least one of the electrodes is associated with a surface of the flex circuit.Type: GrantFiled: September 25, 2008Date of Patent: August 26, 2014Assignee: Apple Inc.Inventors: Benjamin Lyon, Joseph Fisher, Lakshman Rathnam
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Publication number: 20140192006Abstract: Various approaches discussed herein provide a display screen that integrates both capacitive touch sensing and a light guide onto a single optically clear substrate. The substrate can be integrated into a portable device, such as an electronic reader (e-reader) device having a reflective display in order to both illuminate content displayed on the e-reader device and to provide touch sensing input to the device. The capacitive sensors can be fabricated on one side of the optically clear substrate, while the light guide can be fabricated on the opposite side of the substrate.Type: ApplicationFiled: January 4, 2013Publication date: July 10, 2014Inventors: Lakshman Rathnam, Kari Juhani Rinko
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Patent number: 8416198Abstract: A multi-dimensional scroll wheel is disclosed. Scroll wheel circuitry is provided to detect input gestures that traverse the center of the scroll wheel and to detect multi-touch input. The scroll wheel can include a first plurality of sensor elements arranged in a first closed loop and a second plurality of sensor elements arranged in a second closed loop, the first and second closed loops being concentrically arranged about the center of the scroll wheel.Type: GrantFiled: September 5, 2008Date of Patent: April 9, 2013Assignee: Apple Inc.Inventors: Lakshman Rathnam, Louis Bokma, Fletcher Rothkopf, Andrea Mucignat, Erturk Kocalar, Benjamin Lyon, Joseph Fisher
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Patent number: 8395590Abstract: An input device providing integrated contact switch and touch sensor elements is disclosed. A contact switch and touch sensor can be integrated so that they share a common sensor line, achieving space, cost and manufacturing savings over input devices that utilize distinct sensor lines for each of its sensor elements. By configuring a contact switch and touch sensor to share a common sensor line, a controller can use a single pin to scan both the contact switch and touch sensor elements, rather than using distinct pins to scan distinct sensor lines associated with each sensor element. By using fewer pins to scan the same number of sensor elements, a smaller controller can be used which can reduce the size and cost of the input device, and increase manufacturing throughput time associated with the input device.Type: GrantFiled: June 1, 2009Date of Patent: March 12, 2013Assignee: Apple Inc.Inventors: Joseph Fisher, Erturk Kocalar, Lakshman Rathnam
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Publication number: 20100149127Abstract: An input device providing integrated contact switch and touch sensor elements is disclosed. A contact switch and touch sensor can be integrated so that they share a common sensor line, achieving space, cost and manufacturing savings over input devices that utilize distinct sensor lines for each of its sensor elements. By configuring a contact switch and touch sensor to share a common sensor line, a controller can use a single pin to scan both the contact switch and touch sensor elements, rather than using distinct pins to scan distinct sensor lines associated with each sensor element. By using fewer pins to scan the same number of sensor elements, a smaller controller can be used which can reduce the size and cost of the input device, and increase manufacturing throughput time associated with the input device.Type: ApplicationFiled: June 1, 2009Publication date: June 17, 2010Applicant: Apple Inc.Inventors: Joseph FISHER, Erturk KOCALAR, Lakshman RATHNAM
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Publication number: 20100073319Abstract: A capacitive sensor may include a flex circuit, a substrate facing the flex circuit, and conductive electrodes configured to sense an input applied to the substrate. At least one of the conductive electrodes is associated with a surface of the substrate and an at least one of the electrodes is associated with a surface of the flex circuit.Type: ApplicationFiled: September 25, 2008Publication date: March 25, 2010Applicant: Apple Inc.Inventors: Benjamin Lyon, Joseph Fisher, Lakshman Rathnam
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Publication number: 20090229892Abstract: An input device with switchable sensor configurations. In one embodiment, the input device can switch between a sensor configuration in which each of its sensor elements is enabled to sense input and a sensor configuration in which only a subset of its sensor elements are enabled to sense input. In another embodiment, the input device can switch between a sensor configuration in which each of its sensor elements is enabled to sense input and a sensor configuration in which one or more groupings of its sensor elements are enabled to collectively sense input. In a further embodiment, the input device can operate in a detection mode that switches between sensor configurations to determine a position of an input.Type: ApplicationFiled: September 5, 2008Publication date: September 17, 2009Applicant: Apple Inc.Inventors: Joseph Fisher, Erturk Kocalar, Rishabh Bhargava, Lakshman Rathnam