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Christoph H. Krah patents

Recent patents with Christoph H. Krah listed as an inventor - additional entries may be under other spellings.


Christoph H. Krah - Related organizations: Apple Inc. patents

Measuring body capacitance effect in touch sensitive device

12/29/16 - 20160378263 - Measuring an effect of body capacitance in a touch sensitive device is disclosed. This effect can be caused by poor grounding of a user or other objects touching the device or of the device itself. The device can operate in a stray capacitance mode to measure a body capacitance effect
Inventors: Christoph H. Krah, Steven P. Hotelling, Marduke Yousefpor

Power management for touch controller

12/29/16 - 20160378171 - Power management for a touch controller is disclosed. The touch controller can include a transmit section for transmitting stimulation signals to an associated touch sensor panel to drive the panel, where the touch controller can selectively adjust the transmit section to reduce power during the transmission. The touch controller can
Inventors: Christoph H. Krah, Thomas James Wilson

Common electrode auto-compensation method

11/03/16 - 20160320898 - A system is disclosed. The system can comprise dynamic drive circuitry configured to drive a plurality of electrodes on a touch screen. The system can also comprise a switching circuit configured to selectively couple the dynamic drive circuitry to one or more of the plurality of electrodes. The system can
Inventors: Howard Tang, Christoph H. Krah, Paolo Sacchetto, Chaohao Wang

Multi-touch auto scanning

09/29/16 - 20160283038 - A system and method for autonomously scanning a sensor panel device is disclosed. A sensor panel processor can be disabled after a first predetermined amount of time has elapsed without the sensor panel device sensing any events. One or more system clocks can also be disabled to conserve power. While
Inventors: Christoph H. Krah, Minh-dieu Thi Vu, Thomas James Wilson

Proximity and multi-touch sensor detection and demodulation

09/29/16 - 20160282998 - The use of one or more proximity sensors in combination with one or more touch sensors in a multi-touch panel to detect the presence of a finger, body part or other object and control or trigger one or more functions in accordance with an “image” of touch provided by the
Inventors: Steven P. Hotelling, Christoph H. Krah

Channel scan architecture for multiple stimulus multi-touch sensor panels

09/15/16 - 20160266718 - A channel scan architecture for detecting touch events on a touch sensor panel is disclosed. The channel scan architecture can combine drive logic, sense channels and channel scan logic on a single monolithic chip. The channel scan logic can be configured to implement a sequence of scanning processes in a
Inventors: Thomas James Wilson, Christoph H. Krah, Minh-dieu Thi Vu

Multi-chip touch architecture for scalability

09/15/16 - 20160266679 - A multi-chip touch architecture for scalability can include one or more touch controller application specific integrated circuits (ASICs), and one or more switching circuits coupled between the one or more touch controller ASICs and the touch sensor panel. The number of touch controller ASICs and switching circuits can be scaled
Inventors: Shahrooz Shahparnia, Vivek Pant, Christoph H. Krah

Flexible self-capacitance and mutual capacitance touch sensing system architecture

08/04/16 - 20160224177 - A switching circuit is disclosed. The switching circuit can comprise a plurality of pixel mux blocks, each of the pixel mux blocks configured to be coupled to a respective touch node electrode on a touch sensor panel, and each of the pixel mux blocks including logic circuitry. The switching circuit
Inventors: Christoph H. Krah

Input device for touch sensitive devices

06/23/16 - 20160179281 - 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
Inventors: Christoph H. Krah, Shahrooz Shahparnia, Steven P. Hotelling

Display to touch crosstalk compensation

06/09/16 - 20160162119 - A touch sensitive display capable of compensating for crosstalk in the display is disclosed. Crosstalk in display components can be reduced, eliminated, or otherwise compensated for by reducing or eliminating parasitic capacitances that cause the crosstalk. To do so, gate voltages to the display components, such as thin film transistors
Inventors: Christoph H. Krah

Coarse scan and targeted active mode scan for touch and stylus

06/09/16 - 20160162101 - Power consumption of touch sensing operations for touch sensitive devices can be reduced by implementing a coarse scan (e.g., banked common mode scan) to coarsely detect the presence or absence of an object touching or proximate to a touch sensor panel and the results of the coarse scan can be
Inventors: Vivek Pant, Shahrooz Shahparnia, Marduke Yousefpor, Christoph H. Krah

Power management for touch controller

10/15/15 - 20150293583 - Power management for a touch controller is disclosed. The touch controller can include a transmit section for transmitting stimulation signals to an associated touch sensor panel to drive the panel, where the touch controller can selectively adjust the transmit section to reduce power during the transmission. The touch controller can
Inventors: Christoph H. Krah, Thomas James Wilson

Automatic low noise frequency selection

09/17/15 - 20150261285 - Automatic low noise frequency selection for a touch sensitive device is disclosed. A low noise stimulation frequency can be automatically selected by device logic without intervention of the device processor to stimulate the device to sense a touch event at the device. The device logic can automatically select a set
Inventors: Thomas James Wilson, Christoph H. Krah

Single-chip multi-stimulus sensor controller

08/20/15 - 20150234535 - A multi-stimulus controller for a multi-touch sensor is formed on a single integrated circuit (single-chip). The multi-stimulus controller includes a transmit oscillator, a transmit signal section that generates a plurality of drive signals based on a frequency of the transmit oscillator, a plurality of transmit channels that transmit the drive
Inventors: Steven P. Hotelling, Christoph H. Krah, Marduke Yousefpor, Thomas James Wilson

Proximity and multi-touch sensor detection and demodulation

07/09/15 - 20150193039 - The use of one or more proximity sensors in combination with one or more touch sensors in a multi-touch panel to detect the presence of a finger, body part or other object and control or trigger one or more functions in accordance with an “image” of touch provided by the
Inventors: Steven P. Hotelling, Christoph H. Krah

Power management for touch controller

05/14/15 - 20150134994 - Power management system or a touch controller can include a transmit section for transmitting stimulation signals to an associated touch sensor panel to drive the panel, where the touch controller can selectively adjust the transmit section to reduce power during the transmission. The touch controller can also include a receive
Inventors: Christoph H. Krah, Thomas James Wilson

Proximity and multi-touch sensor detection and demodulation

04/09/15 - 20150097780 - The use of one or more proximity sensors in combination with one or more touch sensors in a multi-touch panel to detect the presence of a finger, body part or other object and control or trigger one or more functions in accordance with an “image” of touch provided by the
Inventors: Steven P. Hotelling, Christoph H. Krah

Multipoint touch surface controller

12/11/14 - 20140362048 - A multipoint touch surface controller is disclosed herein. The controller includes an integrated circuit including output circuitry for driving a capacitive multi-touch sensor and input circuitry for reading the sensor. Also disclosed herein are various noise rejection and dynamic range enhancement techniques that permit the controller to be used with
Inventors: Steven P. Hotelling, Christoph H. Krah, Brian Q. Huppi

Multi-touch auto scanning

11/27/14 - 20140347306 - A system and method for autonomously scanning a sensor panel device is disclosed. A sensor panel processor can be disabled after a first predetermined amount of time has elapsed without the sensor panel device sensing any events. One or more system clocks can also be disabled to conserve power. While
Inventors: Christoph H. Krah, Minh-dieu Thi Vu, Thomas James Wilson

Channel scan logic

11/20/14 - 20140340345 - A device that can autonomously scan a sensor panel is disclosed. Autonomous scanning can be performed by implementing channel scan logic. In one embodiment, channel scan logic carries out many of the functions that a processor would normally undertake, including generating timing sequences and obtaining result data; comparing scan result
Inventors: Minh-dieu Thi Vu, Thomas James Wilson, Christoph H. Krah

Phase compensation for multi-stimulus controller

10/16/14 - 20140306913 - Determining a compensated phase matrix for a multi-stimulus demodulation process is provided. A first drive line of a multi-stimulus sensing system is selected, and a stimulation signal is transmitted on the selected drive line. A channel gain resulting from the stimulation signal is measured from a received sense signal resulting
Inventors: Christoph H. Krah


### Christoph H. Krah patent invention listings

The bibliographic references displayed about Christoph H. Krah's patents are for a recent sample of Christoph H. Krah's publicly published patent applications. The inventor/author may have additional bibliographic citations listed at the USPTO.gov. FreshPatents.com is not associated or affiliated in any way with the author/inventor or the United States Patent/Trademark Office but is providing this non-comprehensive sample listing for educational and research purposes using public bibliographic data published and disseminated from the United States Patent/Trademark Office public datafeed. This information is also available for free on the USPTO.gov website. If Christoph H. Krah filed recent patent applications under another name, spelling or location then those applications could be listed on an alternate page. If no bibliographic references are listed here, it is possible there are no recent filings or there is a technical issue with the listing--in that case, we recommend doing a search on the USPTO.gov website.

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