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).

  • Publication number: 20170195806
    Abstract: 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: Application
    Filed: December 19, 2016
    Publication date: July 6, 2017
    Inventors: Andy Atamaniuk, Lakshman Rathnam
  • Patent number: 9632597
    Abstract: 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: Grant
    Filed: June 12, 2014
    Date of Patent: April 25, 2017
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventors: Kishore Sundara-Rajan, Lakshman Rathnam
  • Publication number: 20170095167
    Abstract: 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: Application
    Filed: September 30, 2016
    Publication date: April 6, 2017
    Inventors: William FACTEAU, Brent EDWARDS, Paul RUCKER, Kulbir SANDHU, Cem SHAQUER, Lakshman RATHNAM, Rodney PERKINS
  • Publication number: 20170095202
    Abstract: 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: Application
    Filed: September 30, 2016
    Publication date: April 6, 2017
    Inventors: William FACTEAU, Brent EDWARDS, Paul RUCKER, Kulbir SANDHU, Cem SHAQUER, Lakshman RATHNAM, Rodney PERKINS
  • Publication number: 20170010743
    Abstract: 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: Application
    Filed: September 20, 2016
    Publication date: January 12, 2017
    Inventors: Joseph R. FISHER, JR., Erturk D. KOCALAR, Rishabh BHARGAVA, Lakshman RATHNAM
  • Patent number: 9465472
    Abstract: 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: Grant
    Filed: December 9, 2014
    Date of Patent: October 11, 2016
    Assignee: Amazon Technologies, Inc.
    Inventors: Angeles Marcia Almanza-Workman, Heang Heng, Thiagarajan Marimuthu, Lakshman Rathnam, Krishan Yadav, Jianjun Yang
  • Patent number: 9454256
    Abstract: 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: Grant
    Filed: September 5, 2008
    Date of Patent: September 27, 2016
    Assignee: Apple Inc.
    Inventors: Joseph Fisher, Erturk Kocalar, Rishabh Bhargava, Lakshman Rathnam
  • Publication number: 20160170250
    Abstract: 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: Application
    Filed: December 11, 2014
    Publication date: June 16, 2016
    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
  • Patent number: 9360696
    Abstract: 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: Grant
    Filed: December 11, 2014
    Date of Patent: June 7, 2016
    Assignee: 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
  • Patent number: 9298324
    Abstract: 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: Grant
    Filed: March 11, 2013
    Date of Patent: March 29, 2016
    Assignee: Amazon Technologies, Inc.
    Inventors: Gabriel Isaiah Rowe, Lakshman Rathnam
  • Publication number: 20150363012
    Abstract: 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: Application
    Filed: June 12, 2014
    Publication date: December 17, 2015
    Inventors: Kishore Sundara-Rajan, Lakshman Rathnam
  • Patent number: 9035752
    Abstract: 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: Grant
    Filed: March 11, 2013
    Date of Patent: May 19, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Ilya Daniel Rosenberg, Lakshman Rathnam, Nadim Awad, John Aaron Zarraga, David Charles Buuck, Julien George Beguin
  • Patent number: 8866780
    Abstract: 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: Grant
    Filed: April 8, 2013
    Date of Patent: October 21, 2014
    Assignee: Apple Inc.
    Inventors: Lakshman Rathnam, Louis Bokma, Fletcher Rothkopf, Andrea Mucignat, Erturk Kocalar, Benjamin Lyon, Joseph Fisher
  • Patent number: 8816967
    Abstract: 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: Grant
    Filed: September 25, 2008
    Date of Patent: August 26, 2014
    Assignee: Apple Inc.
    Inventors: Benjamin Lyon, Joseph Fisher, Lakshman Rathnam
  • Publication number: 20140192006
    Abstract: 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: Application
    Filed: January 4, 2013
    Publication date: July 10, 2014
    Inventors: Lakshman Rathnam, Kari Juhani Rinko
  • Patent number: 8416198
    Abstract: 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: Grant
    Filed: September 5, 2008
    Date of Patent: April 9, 2013
    Assignee: Apple Inc.
    Inventors: Lakshman Rathnam, Louis Bokma, Fletcher Rothkopf, Andrea Mucignat, Erturk Kocalar, Benjamin Lyon, Joseph Fisher
  • Patent number: 8395590
    Abstract: 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: Grant
    Filed: June 1, 2009
    Date of Patent: March 12, 2013
    Assignee: Apple Inc.
    Inventors: Joseph Fisher, Erturk Kocalar, Lakshman Rathnam
  • Publication number: 20100149127
    Abstract: 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: Application
    Filed: June 1, 2009
    Publication date: June 17, 2010
    Applicant: Apple Inc.
    Inventors: Joseph FISHER, Erturk KOCALAR, Lakshman RATHNAM
  • Publication number: 20100073319
    Abstract: 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: Application
    Filed: September 25, 2008
    Publication date: March 25, 2010
    Applicant: Apple Inc.
    Inventors: Benjamin Lyon, Joseph Fisher, Lakshman Rathnam
  • Publication number: 20090229892
    Abstract: 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: Application
    Filed: September 5, 2008
    Publication date: September 17, 2009
    Applicant: Apple Inc.
    Inventors: Joseph Fisher, Erturk Kocalar, Rishabh Bhargava, Lakshman Rathnam