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Christoph Horst Krah patents

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


Christoph Horst Krah - Related organizations: Apple Inc. patents, Apple, Inc. patents

Panel mismatch compensation for touch enabled displays

09/17/15 - 20150261340 - A controller with mismatch compensation for a touch panel is disclosed. A multi-stimulus controller for a touch panel can be formed on a single integrated circuit (single-chip) that can include a transmit section that can generate a plurality of drive signals, a plurality of transmit channels that can transmit the
Inventors: Christoph Horst Krah

Dynamic cross-talk mitigation for integrated touch screens

09/18/14 - 20140267087 - A touch input device configured to mitigate the effects of dynamic cross talk noise is provided. The touch input device can dither an effective resistance of a plurality of gate lines proximal to the touch sensor panel in order to determine if a phase of a touch signal demodulator needs
Inventors: Marduke Yousefpor, Christoph Horst Krah, Kevin J. White

Dynamic cross-talk mitigation for integrated touch screens

09/18/14 - 20140267086 - A touch input device configured to mitigate the effects of dynamic cross talk noise is provided. The touch input device can dither an effective resistance of a plurality of gate lines proximal to the touch sensor panel in order to determine if a phase of a touch signal demodulator needs
Inventors: Marduke Yousefpor, Christoph Horst Krah, Kevin J. White

Touch screen liquid crystal display

06/05/14 - 20140152619 - Disclosed herein are liquid-crystal display (LCD) touch screens that integrate the touch sensing elements with the display circuitry. The integration may take a variety of forms. Touch sensing elements can be completely implemented within the LCD stackup but outside the not between the color filter plate and the array plate.
Inventors: Steve Porter Hotelling, Wei Chen, Christoph Horst Krah, John Greer Elias, Wei Hsin Yao, John Z. Zhong, Andrew Bert Hodge, Brian Richards Land, Willem Den Boer

Integrated display and touch screen

05/22/14 - 20140139457 - Liquid crystal display (LCD) touch screens integrate touch sensing elements with display circuitry and may include in-plane-switching (IPS) LCDs. A method of operating the integrated touch sensing elements with the display circuitry includes dividing touch-sensing circuitry of the touch screen into a plurality of drive segments, each drive segment overlapping
Inventors: Steve Porter Hotelling, Wei Chen, Christoph Horst Krah, John Greer Elias, Wei Hsin Yao, John Z. Zhong, Andrew Bert Hodge, Brian Richards Land, Willem Den Boer

Scan sequence generator

04/03/14 - 20140092063 - A sensor panel device that can generate and use a stimulus signal having multiple different waveforms for detecting events on or near the sensor panel is disclosed. Among other things, such a stimulus signal can be used to reject environmental noise present in the device. In some embodiments, the stimulus
Inventors: Christoph Horst Krah, Minh-dieu Thi Vu

Touch controller with improved diagnostics calibration and communications support

02/20/14 - 20140049497 - A touch controller with improved diagnostics calibration and communication support includes a data capture register configured to sample data from one or a plurality of touch panel sense channels at an output of an analog to digital (A/D) converter. The sampled data is bit packed, and a demodulation waveform is
Inventors: Christoph Horst Krah, Thomas James Wilson

Single-chip multi-stimulus sensor controller

02/13/14 - 20140043293 - 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: Steve Porter Hotelling, Christoph Horst Krah, Marduke Yousefpor, Thomas James Wilson

Modular stylus device

01/30/14 - 20140028635 - Modular styluses having a base module an expansion module are disclosed. The base module can include a stylus tip, a stylus stimulation signal circuit capable of generating a stimulation signal, a processor for controlling the stylus stimulation signal circuit, and a connection interface for selectively connecting the base module to
Inventors: Christoph Horst Krah

Stylus device

01/30/14 - 20140028634 - Styluses capable of generating stylus stimulation signals and touch sensitive devices capable of receiving stylus stimulation signals are disclosed. In one example, a stylus can receive a stimulation signal from a touch sensor of a touch sensitive device and generate a stylus stimulation signal by changing an amplitude or frequency
Inventors: Christoph Horst Krah, Marduke Yousefpor, Kevin J. White, Martin Paul Grunthaner

Touch detection using multiple simultaneous frequencies

10/17/13 - 20130271410 - The use of multiple stimulation frequencies and phases to generate an image of touch on a touch sensor panel is disclosed. Each of a plurality of sense channels can be coupled to a column in a touch sensor panel and can have multiple mixers. Each mixer in the sense channel
Inventors: Christoph Horst Krah, Steve Porter Hotelling, Sean Erik O'connor, Wayne Carl Westerman

Touch sensor common mode noise recovery

10/10/13 - 20130265242 - A touch sensor panel configured to minimize the effect on touch or proximity event detection caused by a common mode noise event. The touch sensor panel includes circuitry that works to minimize the amount of time that the touch sensor panel is unable to accurately sense touch and proximity events
Inventors: Peter W. Richards, Christoph Horst Krah, Martin Paul Grunthaner

Quadrature demodulation for touch sensitive devices

08/15/13 - 20130207906 - Demodulation circuits and processes for demodulating touch signals from a touch sensor using the demodulation circuits are provided. The demodulation circuits can include circuitry configured to determine an adjustable phase delay based at least in part on a quadrature component of the touch signal or the phase-adjusted touch signal. The
Inventors: Marduke Yousefpor, Kevin J. White, Christoph Horst Krah

Power management for integrated touch screens

03/28/13 - 20130076648 - Reducing or eliminating the effects of noise that can be generated by a power system of a touch screen device, such as a gate line voltage system that applies voltage to gate lines of the touch screen, is provided. In one example, a power supply, such as a charge pump,
Inventors: Christoph Horst Krah, Kevin J. White, Yafei Bi

Force sensor interface for touch controller

03/28/13 - 20130076646 - A force sensor interface in a touch controller of a touch sensitive device is disclosed. The force sensor interface can couple to touch circuitry to integrate one or more force sensors with touch sensors of the device. The force sensor interface can include one portion to transmit stimulation signals generated
Inventors: Christoph Horst Krah, Eugene Lvovich Shoykhet, Martin Paul Grunthaner

Concurrent touch and negative pixel scan

03/21/13 - 20130069905 - A concurrent touch and negative pixel scan performed at a touch panel is disclosed. The concurrent scan can include sensing an object proximate to the touch panel and sensing a negative pixel effect, based the object's grounding condition, at the touch panel, at the same time. As a result, sense
Inventors: Christoph Horst Krah, Marduke Yousefpor

Noise rejection circuit for touch sensitive display

03/21/13 - 20130069904 - A noise rejection circuit for a touch sensitive display is disclosed. The noise rejection circuit can reject noise introduced by the touch sensitive display's display device into its touch panel. The noise rejection circuit can be integrated into the touch circuitry of the touch sensitive display and can include a
Inventors: Christoph Horst Krah

Scan sequence generator

11/08/12 - 20120280932 - A sensor panel device that can generate and use a stimulus signal having multiple different waveforms for detecting events on or near the sensor panel is disclosed. Among other things, such a stimulus signal can be used to reject environmental noise present in the device. In some embodiments, the stimulus
Inventors: Christoph Horst Krah, Minh-dieu Thi Vu

Touch screen liquid crystal display

10/25/12 - 20120268423 - Disclosed herein are liquid-crystal display (LCD) touch screens that integrate the touch sensing elements with the display circuitry. The integration may take a variety of forms. Touch sensing elements can be completely implemented within the LCD stackup but outside the not between the color filter plate and the array plate.
Inventors: Steve Porter Hotelling, Wei Chen, Christoph Horst Krah, John Greer Elias, Wei Hsin Yao, John Z. Zhong, Andrew Bert Hodge, Brian Richards Land, Willem Den Boer

Interactive holographic display device

08/02/12 - 20120194477 - A display apparatus configured to produce an interactive three-dimensional holographic image is disclosed. The display apparatus can include one or more coherent light sources configured to produce one or more beams, based on obtained image data of an object to display, and a lens assembly configured to direct the one
Inventors: Christoph Horst Krah

Display to touch crosstalk compensation

07/19/12 - 20120182251 - 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 Horst Krah

Multi-touch auto scanning

06/28/12 - 20120162129 - 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 Horst Krah, Minh-dieu Thi Vu, Thomas James Wilson

Multi-touch auto scanning

06/21/12 - 20120157167 - 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 Horst Krah, Minh-dieu Thi Vu, Thomas James Wilson

Touch device communication

06/07/12 - 20120139865 - A system for data communication between a plurality of touch devices is disclosed. The system can include a first touch device having a first touch surface, and at least one other touch device having at least one other touch surface. The first touch device and the at least one other
Inventors: Christoph Horst Krah, Steven Porter Hotelling

Noise reduction for touch controller

06/07/12 - 20120139846 - A touch controller having noise reduction circuitry is disclosed. The touch controller can include a transmit section for generating stimulation signals to drive a touch display to sense a touch or hover event. The touch controller can also include a receive section for processing touch signals from the touch display
Inventors: Christoph Horst Krah, Ali Motamed

Downsampling data for crosstalk compensation

05/10/12 - 20120113064 - A touch sensitive device having circuitry to compensate for crosstalk from the device display to the device touch sensor panel is disclosed. The crosstalk compensation circuitry can include a downsampler and a crosstalk compensator. The downsampler can downsample a display image to a manageable size for transmission and processing and
Inventors: Kevin J. White, Marduke Yousefpor, Christoph Horst Krah, Steven Porter Hotelling

Channel scan logic

04/26/12 - 20120098778 - 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 Horst Krah

Single-chip multi-stimulus sensor controller

01/26/12 - 20120019467 - 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: Steve Porter Hotelling, Christoph Horst Krah, Marduke Yousefpor, Thomas James Wilson

Sar adc with dynamic input scaling and offset adjustment

11/10/11 - 20110273402 - An apparatus for generating an image of touch on or about a touch-sensitive surface comprising a touch panel is disclosed. The touch panel can include a plurality of touch sensors configured for detecting one or more touch events occurring at distinct locations at about the same time. Each touch event
Inventors: Steve Porter Hotelling, Christoph Horst Krah

Segmented vcom

08/04/11 - 20110187677 - Disclosed herein are liquid-crystal display (LCD) touch screens that integrate the touch sensing elements with the display circuitry. The integration may take a variety of forms. Touch sensing elements can be completely implemented within the LCD stackup but outside the not between the color filter plate and the array plate.
Inventors: Steve Porter Hotelling, Wei Chen, Christoph Horst Krah, John Greer Elias, Wei Hsin Yao, John Z. Zhong, Andrew Bert Hodge, Brian Richards Land, Willem Den Boer

Automatic low noise frequency selection

03/17/11 - 20110063993 - 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 Horst Krah

Method to compensate for the frequency dependence of sense signal preprocessing

03/17/11 - 20110063229 - Compensating for the frequency dependence of sense signal preprocessing in preprocessing channel circuitry is provided. The frequency dependence of the preprocessing channels can be modified to change a frequency dependent channel into a frequency independent channel, to change a frequency independent channel into a frequency dependent channel, or to change
Inventors: Christoph Horst Krah, Yutaka Hori

Touch controller with improved analog front end

03/17/11 - 20110063154 - 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 multiplex a plurality
Inventors: Steven Porter Hotelling, Christoph Horst Krah

Measuring body capacitance effect in touch sensitive device

03/17/11 - 20110061949 - 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 Horst Krah, Steven Porter Hotelling, Marduke Yousefpor

Touch controller with improved diagnostics calibration and communications support

03/17/11 - 20110061948 - A touch controller with improved diagnostics calibration and communication support includes a data capture register configured to sample data from one or a plurality of touch panel sense channels at an output of an analog to digital (A/D) converter. The sampled data is bit packed, and a demodulation waveform is
Inventors: Christoph Horst Krah, Thomas James Wilson

Power management for touch controller

03/17/11 - 20110061947 - 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 Horst Krah, Thomas James Wilson

Detection of low noise frequencies for multiple frequency sensor panel stimulation

02/03/11 - 20110025634 - The identification of low noise stimulation frequencies for detecting and localizing touch events on a touch sensor panel is disclosed. Each of a plurality of sense channels can be coupled to a separate sense line in a touch sensor panel and can have multiple mixers, each mixer using a demodulation
Inventors: Christoph Horst Krah, Steve Porter Hotelling, Sean Erik O'connor, Wayne Carl Westerman

Channel scan logic

07/29/10 - 20100188356 - 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 Horst Krah

Channel scan logic

07/08/10 - 20100173680 - 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 Horst Krah

Channel scan logic

07/01/10 - 20100164898 - 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

Circuit having a low power mode

03/11/10 - 20100064160 - Embodiments of the invention include an IC that includes a core used for ordinary operation and a thin power circuit. The thin power circuit can be configured to use very little power. The IC can also include a digital interface and a connection thereto. The IC can initiate transition to

Channel scan architecture for multiple stimulus multi-touch sensor panels

03/11/10 - 20100060590 - 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

Single-chip multi-stimulus sensor controller

03/11/10 - 20100059295 - 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

Multipoint touch surface controller

12/24/09 - 20090315850 - 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

Sar adc with dynamic input scaling and offset adjustment

10/01/09 - 20090244014 - An apparatus for generating an image of touch on or about a touch-sensitive surface comprising a touch panel is disclosed. The touch panel can include a plurality of touch sensors configured for detecting one or more touch events occurring at distinct locations at about the same time. Each touch event

Charge recycling for multi-touch controllers

08/27/09 - 20090212642 - The recycling of charge when two or more of the drive lines of a touch sensor panel are being simultaneously stimulated with the in-phase and anti-phase components of a stimulation signal is disclosed. To perform charge recycling, a discharge path can be selectively formed between drive lines being stimulated with

Auto scanning for multiple frequency stimulation multi-touch sensor panels

07/30/09 - 20090189867 - The use of multiple stimulation frequencies and phases is disclosed to detect touch events on a touch sensor panel in a low-power state. Simultaneously during every frame, a number of rows of the touch sensor panel can be driven with a positive phase of one or more stimulation signals, and


### Christoph Horst Krah patent invention listings

The bibliographic references displayed about Christoph Horst Krah's patents are for a recent sample of Christoph Horst 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 Horst 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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