1
Steven Porter Hotelling, Christoph Horst Krah: Touch controller with improved analog front end. Apple, Morrison & Foerster, October 4, 2011: US08031094 (329 worldwide citation)

A controller for a touch sensor includes a transimpedance amplifier, and a feedback resistor coupled to an input of the transimpedance amplifier and to an output of the transimpedance amplifier. At least one multiplexor may be coupled to the input of the transimpedance amplifier and configured to mu ...


2
Charles Whipple Case Jr, Torbjorn Hovden, Gregory Clark Smith, Steven Porter Hotelling, Michael Kenneth Sabina: Electronic pointing apparatus and method. Gyration, Saratoga, Fenwick & West, October 20, 1998: US05825350 (260 worldwide citation)

Pointing apparatus and method provide for control of cursor movement and selection of elements on a computer screen. Gyroscopic elements within the pointing apparatus indicate yaw and pitch movements in free space, and a mouse ball and mouse ball encoders indicate movement on a surface. Data indicat ...


3
Steven Porter Hotelling, Marduke Yousefpor, Shih Chang Chang, John Z Zhong: Integrated touch screen. Apple, Morrison & Foerster, December 28, 2010: US07859521 (90 worldwide citation)

Displays with touch sensing circuitry integrated into the display pixel stackup are provided. Circuit elements, such as touch signal lines, such as drive lines and sense lines, grounding regions, in the display pixel stackups can be grouped together to form touch sensing circuitry that senses a touc ...


4
Steven Porter Hotelling, Joshua Strickon, Brian Q Huppi: Multipoint touchscreen. Apple, Morrison & Foerster, February 28, 2012: US08125463 (83 worldwide citation)

A touch panel having a transparent capacitive sensing medium configured to detect multiple touches or near touches that occur at the same time and at distinct locations in the plane of the touch panel and to produce distinct signals representative of the location of the touches on the plane of the t ...


5
Steven Porter Hotelling, Marduke Yousefpor, Shih Chang Chang, John Z Zhong: Integrated touch screen. Apple, Morrison & Foerster, July 10, 2012: US08217913 (37 worldwide citation)

Displays with touch sensing circuitry integrated into the display pixel stackup are provided. Circuit elements, such as touch signal lines, such as drive lines and sense lines, grounding regions, in the display pixel stackups can be grouped together to form touch sensing circuitry that senses a touc ...


6
Jonah A Harley, Li Quan Tan, Debanjan Mukherjee, Steven Porter Hotelling: Stylus orientation detection. Apple, Morrison & Foerster, January 28, 2014: US08638320 (30 worldwide citation)

Stylus orientation detection is disclosed. In an example, the orientation of a stylus relative to a contacting surface, e.g., a touch panel, can be detected by detecting a capacitance at one or more locations on the stylus relative to the surface, and then using the capacitance(s) to determine the o ...


7
John Greer Elias, Steven Porter Hotelling: Mitigation of parasitic capacitance. Apple, Morrison & Foerster, July 21, 2015: US09086768 (17 worldwide citation)

A touch sensor panel configured to mitigate the effect of parasitic capacitance on the ability of a capacitive touch sensor panel to reliably detect touch and proximity events. The touch sensor panel includes circuitry that can electrically drive a set of conductive shields that partially encapsulat ...


8
Marduke Yousefpor, Shih Chang Chang, Kevin J White, Steven Porter Hotelling: Integrated touch sensitive display gate driver. Apple, Morrison & Foerster, September 17, 2013: US08537126 (17 worldwide citation)

A gate driver circuit for switching gate line voltage supplies between display and touch modes is disclosed. The circuit can include one or more switches configured to switch one or more gate lines of an integrated touch sensitive display between a display mode and a touch mode. During touch mode, t ...


9
Seung Jae Hong, Martin Paul Grunthaner, Steven Porter Hotelling, Lynn Youngs: Touch sensor panel design. Apple, Morrison & Foerster, November 26, 2013: US08593410 (16 worldwide citation)

A touch sensor panel including a plurality of drive lines crossing a plurality of sense lines, forming an array. The plurality of drive lines and the plurality of sense lines are formed by interconnecting sections of at least one conductive material having a truncated diamond shape or formed of inte ...


10
John Greer Elias, Steven Porter Hotelling: Capacitance touch near-field—far field switching. Apple, Morrison & Foerster, December 16, 2014: US08913021 (15 worldwide citation)

A touch sensor panel configured to switch between a mutual capacitance near field sensing architecture and a self-capacitance far field sensing architecture. The touch sensor panel includes circuitry that can switch the configuration of touch electrodes to act as either drive lines in a mutual capac ...