scispace - formally typeset
Search or ask a question
Author

Shahrooz Shahparnia

Bio: Shahrooz Shahparnia is an academic researcher from Apple Inc.. The author has contributed to research in topics: Stylus & Signal. The author has an hindex of 19, co-authored 56 publications receiving 1023 citations.

Papers published on a yearly basis

Papers
More filters
Patent
24 Feb 2011
TL;DR: In this article, a shift from using the first demodulated output for determining positional information to using the second demodulation for determining the positional information is made based at least in part upon an amount of interference.
Abstract: In a method of interference avoidance for a capacitive sensor device, a transmitter signal is transmitted with a transmitter electrode of the capacitive sensor device. A resulting signal is received with a receiver electrode of the capacitive sensor device. The resulting signal corresponds to the transmitter signal. A first demodulated output is acquired by demodulating the resulting signal in a first way. A second demodulated output is acquired by demodulating the resulting signal in a second way, where the second way and the first way differ. A shift is made from using the first demodulated output for determining positional information to using the second demodulated output for determining positional information. The shift is based at least in part upon an amount of interference.

85 citations

Patent
29 Feb 2016
TL;DR: In this article, a method for receiving data from an input device to a computing device through a touch interface is proposed, which includes detecting an input devices, synchronizing with the input device by receiving a position signal and activating an input-device scan of the touch interface, receiving a data signal from the input devices through at least one of a sense line or a drive line of the input interface, and scanning the touch interfaces for a touch input by applying a stimulation signal to the at most one drive line and analyzing the at least 1 sense line.
Abstract: A method for receiving data from an input device to a computing device through a touch interface. The method includes detecting an input device, synchronizing with the input device by receiving a position signal and activating an input device scan of the touch interface, receiving a data signal from the input device through at least one of a sense line or a drive line of the touch interface, and scanning the touch interface for a touch input by applying a stimulation signal to the at least one drive line and analyzing the at least one sense line.

68 citations

Patent
09 Jan 2015
TL;DR: In this article, the authors present a method for wireless sensor data transmission from one or more sensors in or on a stylus to a device through a touch sensor of the device.
Abstract: In one embodiment, a method includes receiving sensor data from one or more sensors in or on a stylus, the stylus including one or more electrodes and one or more computer-readable non-transitory storage media embodying logic for wirelessly transmitting signals to a device through a touch sensor of the device. The method includes generating a carrier signal and modulating the carrier signal to communicate the sensor data and wirelessly transmitting from the stylus to the device the carrier signal as modulated through the touch sensor of the device.

53 citations

Patent
16 Jul 2014
TL;DR: In this paper, a touch controller that can configure touch circuitry according to a scan plan, which can define a sequence of scan events to be performed on a touch panel, is presented, which advantageously provides more robust and flexible touch circuitry to handle various types of touch events at the panel.
Abstract: A touch controller that can configure touch circuitry according to a scan plan, which can define a sequence of scan events to be performed on a touch panel is disclosed. The touch controller can include a configurable transmit section to generate stimulation signals to drive the panel, a configurable receive section to receive and process touch signals from the panel, and a configurable memory to store the touch signals. The touch controller can also include a programmable scan engine to configure the transmit section, the receive section, and the memory according to the scan plan. The touch controller advantageously provides more robust and flexible touch circuitry to handle various types of touch events at the panel. An active stylus that can generate stimulation signals that can be detected by the touch controller during various touch events at the panel is also disclosed.

44 citations

Patent
24 Feb 2011
TL;DR: In this article, a transmitter signal is transmitted with a combination electrode of the integrated capacitive sensor device and display device during a non-display update time period associated with row update of the display device.
Abstract: In a method of capacitive sensing using an integrated capacitive sensor device and display device, a transmitter signal is transmitted with a combination electrode of the integrated capacitive sensor device and display device. The combination electrode is configured for both capacitive sensing and display updating. The transmitter signal transitions at least twice during a non-display update time period associated with row update of the display device. A display of the display device is updated during an update time period. A resulting signal is received with a receiver electrode of the integrated capacitive sensor device and display device during the non-display update time period. The resulting signal corresponds to the transmitter signal.

41 citations


Cited by
More filters
Patent
14 Jun 2016
TL;DR: Newness and distinctiveness is claimed in the features of ornamentation as shown inside the broken line circle in the accompanying representation as discussed by the authors, which is the basis for the representation presented in this paper.
Abstract: Newness and distinctiveness is claimed in the features of ornamentation as shown inside the broken line circle in the accompanying representation.

1,500 citations

Patent
30 May 2014
TL;DR: In this paper, an in-cell touch panel and a display device are used to decrease the influence of the touch driving electrode in an image display on image display, where the touch sensing electrodes include one or a plurality of touch sensing sub-electrodes which are parallel to each other.
Abstract: Embodiments of the present invention provide an in-cell touch panel and a display device to decrease the influence of the touch driving electrode in the in-cell touch panel on image display. The in-cell touch panel includes an upper substrate and a lower substrate opposite to each other, and includes a plurality of touch sensing electrodes provided on the upper substrate and a plurality of touch driving electrodes provided on the lower substrate, wherein the touch sensing electrodes are laterally distributed, and the touch driving electrodes are longitudinally distributed; wherein the touch sensing electrodes include one or a plurality of touch sensing sub-electrodes which are parallel to each other and distributed laterally, and the plurality of touch sensing sub-electrodes are in parallel connection therebetween.

397 citations

Patent
27 Mar 2014
TL;DR: In this article, a combination touch and transducer input system is provided, which facilitates user input into an electronic system with a finger and/or a transducers (e.g., a stylus).
Abstract: A combination touch and transducer input system is provided, which facilitates user input into an electronic system with a finger and/or a transducer (e.g., a stylus). The system includes a transducer configured to generate an electric field, and a sensor including an array of electrodes and a controller. The transducer is configured to transmit digital data, such as pen pressure data and switch status data, to the sensor. For example, the transducer comprises electronic circuitry configured to encode the digital data in a signal for transmission to the sensor. The sensor controller is configured to operate both in a touch sensing mode and in a transducer sensing mode. During the touch sensing mode, the controller determines a position of a proximate object (e.g., a finger) by capacitively sensing the object with the array of electrodes. During the transducer sensing mode, the controller determines a position of the transducer based on a signal received by the array of electrodes from the transducer, and also receives and decodes the digital data encoded in the received signal. Digital data can be encoded in a signal using any suitable digital modulation techniques, such as a Frequency-Shift Keying (FSK) technique.

384 citations

Patent
Zoran Radivojevic1, Paul Beecher1, Chris Bower1, Piers Andrew1, Darryl Cotton1, Samiul Haque1 
16 Aug 2012
TL;DR: In this paper, an apparatus including a plurality of adjacent repeated base units, each base unit formed from an active electrode of first, second, third and third touch sensor arrays, each including an active electrodes connected to a respective common terminal of the touch sensor array, where a swipe touch gesture applied to two or more adjacent active electrodes of the apparatus generates signalling at the respective common terminals of the corresponding touch sensors.
Abstract: An apparatus including a plurality of adjacent repeated base units, each base unit formed from an active electrode of first, second and third touch sensor arrays, the first, second and third touch sensor arrays each including a plurality of active electrodes connected to a respective common terminal of the touch sensor array, wherein each base unit includes an active electrode of the second touch sensor array interlaced between an active electrode of the first touch sensor array and an active electrode of the third touch sensor array such that a swipe touch gesture applied to two or more adjacent active electrodes of the apparatus generates signalling at the respective common terminals of the corresponding touch sensor arrays which allows the direction of the swipe touch gesture to be determined.

383 citations

Patent
14 Mar 2014
TL;DR: In this paper, a display device with a touch detection function includes a display area and a touch detector electrode that includes thin wire segments having first and second ends having different orientations.
Abstract: According to an aspect, a display device with a touch detection function includes a display area and a touch detection electrode that includes thin wire segments having first and second ends. Thin wire segments include a thin wire segment extending in a direction different from a pixel arrangement direction in which color regions having the highest human visibility are arranged. The second end is located away from the first end in a direction toward a target position that is distant from the first end in a pixel orthogonal direction by N times of a maximum length of one of the pixels in the pixel orthogonal direction, and in the pixel arrangement direction by M times of a maximum length of one of the pixels in the pixel arrangement direction. Each of N and M is an integer of 2 or larger. N and M are different from each other.

308 citations