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公开(公告)号：US09678609B2
公开(公告)日：2017-06-13
申请号：US14059411
申请日：2013-10-21
Applicant: Apple Inc.
Inventor： Weijun Yao , Ahmad Al-Dahle , Yingxuan Li , Wei Hsin Yao
CPC classification number: G06F3/044 , G06F3/0416
Abstract: Systems and processes for stimulating a touch sensor panel using orthogonal frequencies are provided. In one example process, the drive lines of the touch sensor panel can be stimulated with stimulation signals having orthogonal frequencies. The orthogonal frequencies can be separated by a frequency that is inversely proportional to an integration time of the touch sensor panel. The touch signals generated in response to the stimulation signals can be amplified, converted into digital form, demodulated using the orthogonal frequencies, and integrated over the integration time. Integrating the demodulated signals over a length of time that is inversely proportional to the frequency spacing between the orthogonal frequencies reduces or eliminates interference in the touch signals caused by the stimulation signals having different frequencies.
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公开(公告)号：US11561647B2
公开(公告)日：2023-01-24
申请号：US16924047
申请日：2020-07-08
Applicant: Apple Inc.
Inventor： Yingxuan Li , Weijun Yao , Vivek Pant , Martin Paul Grunthaner , Marduke Yousefpor , Sumant Ranganathan
IPC: G06F3/041 , G06F3/044 , G06F3/0354
Abstract: A touch sensor panel is disclosed. In some examples, the touch sensor panel comprises a plurality of touch node electrodes. In some examples, the touch sensor panel comprises a touch controller configured to drive and sense the plurality of touch node electrodes in a fully bootstrapped configuration to obtain a fully bootstrapped touch image, drive and sense the plurality of touch node electrodes in a second configuration, different from the fully bootstrapped configuration, to obtain a second touch image, the second touch image including an effect of water on the touch sensor panel, and determine a final touch image based on the fully bootstrapped touch image and the second touch image, the final touch image not including the effect of the water on the touch sensor panel. In some examples, the second configuration comprises a mutual capacitance configuration. In some examples, the second configuration comprises a partially bootstrapped configuration.
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公开(公告)号：US10936120B2
公开(公告)日：2021-03-02
申请号：US15313549
申请日：2014-05-22
Applicant: Apple Inc.
Inventor： Weijun Yao , Ahmad Al-Dahle , Hyunwoo Nho , Taif A. Syed , Wei Hsin Yao , Yingxuan Li
Abstract: A self-capacitance touch screen. In some examples, the touch screen comprises a plurality of display pixels, a first display pixel of the plurality of display pixels including a first touch electrode of a plurality of touch electrodes, and a gate line coupled to the first display pixel, wherein the gate line is configured such that a voltage at the gate line substantially follows a voltage at the first touch electrode. In some examples, the gate line is coupled to a resistor, the resistor being configured to decouple the gate line from ground. In some examples, the gate line is coupled to an AC voltage source.
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公开(公告)号：US10691235B2
公开(公告)日：2020-06-23
申请号：US14256849
申请日：2014-04-18
Applicant: Apple Inc.
Inventor： Weijun Yao , Wei Hsin Yao , Yingxuan Li , Hopil Bae , Ahmad Al-Dahle
Abstract: Integrated touch screens are provided including drive lines formed of grouped-together circuit elements of a thin film transistor layer and sense lines formed between a color filter layer and a material layer that modifies or generates light. The common electrodes (Vcom) in the TFT layer can be grouped together during a touch sensing operation to form drive lines. Sense lines can be formed on a separate layer dedicated to only touch hardware.
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25.发明授权公开(公告)号：US10277119B2
公开(公告)日：2019-04-30
申请号：US15798193
申请日：2017-10-30
Applicant: Apple Inc.
Inventor： Weijun Yao , David A. Stronks , Hopil Bae , Kingsuk Brahma , Wei Hsin Yao , Yafei Bi , Yingxuan Li
IPC: G06F3/044 , H02M3/07 , G06F3/041 , G06F1/3234 , H01L23/64
Abstract: A charge pump that can be configured to operate in a first mode and a second mode is disclosed. The charge pump can comprise a charging capacitor coupled to a first node and configured to transfer a first DC voltage to the first node. The charge pump can also comprise a first output node and a second output node coupled to the first node. During the first mode, the first output node can be configured to output a second DC voltage based on the first DC voltage, and the second output node can be configured to output a third DC voltage based on the first DC voltage. During the second mode, the first output node can be configured to output the second DC voltage, and the second output node can be configured to output an AC voltage, the AC voltage being offset by the third DC voltage.
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Patent Agency Ranking
公开(公告)号：US10209813B2
公开(公告)日：2019-02-19
申请号：US15039400
申请日：2014-09-30
Applicant: APPLE INC.
Inventor： Weijun Yao , Wei Hsin Yao , Yingxuan Li , Bingrui Yang , Marduke Yousefpor , Abbas Jamshidi-Roudbari , Ahmad Al-Dahle
Abstract: A self-capacitive touch sensor panel configured to have a portion of both the touch and display functionality integrated into a common layer is provided. The touch sensor panel includes a layer with circuit elements that can switchably operate as both touch circuitry and display circuitry such that during a touch mode of the device the circuit elements operate as touch circuitry and during a display mode of the device the circuit elements operate as display circuitry. The touch mode and display mode can be time multiplexed. By integrating the touch hardware and display hardware into common layers, savings in power, weight and thickness of the device can be realized.
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公开(公告)号：US10043469B2
公开(公告)日：2018-08-07
申请号：US15708795
申请日：2017-09-19
Applicant: Apple Inc.
Inventor： Ahmad Al-Dahle , Yingxuan Li , Marduke Yousefpor , Weijun Yao
Abstract: Systems and method of performing touch and force sensing in an electronic device. The device includes a cover and an array of touch-sensor electrodes disposed below the cover. The first array of electrodes may be configured to sense a touch on the cover using a capacitive sensing scheme. The device also includes a force-sensor drive electrode disposed below the first array of electrodes and a force-sensor sense electrode disposed below the force-sensor drive electrode. The force-sensor drive and sense electrode may be configured to sense a force on the cover. The device also includes a shared drive circuit having an output that is operatively coupled to the array of touch-sensor electrodes and the force-sensor drive electrode.
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28.发明授权公开(公告)号：US10008172B2
公开(公告)日：2018-06-26
申请号：US14276146
申请日：2014-05-13
Applicant: APPLE INC.
Inventor： Yingxuan Li , Weijun Yao , Wei H. Yao , Kingsuk Brahma , Hyunwoo Nho
IPC: G09G3/36
CPC classification number: G09G3/3688 , G09G3/3648 , G09G3/3655 , G09G3/3696 , G09G2300/0426 , G09G2310/027 , G09G2310/0291 , G09G2320/0233 , G09G2320/0276 , G09G2320/029
Abstract: Devices and methods for reducing or eliminating image artifacts are provided. By way of example, a display panel includes a pixels including pixel electrodes configured to receive an image data signal, and common electrodes (VCOMs) configured to receive a common voltage signal. The display panel includes a source driver, which includes a first digital to analog converter (DAC) configured to generate a gamma voltage signal to provide a first adjustment to the image data signal, and a second DAC configured to generate an error correction voltage signal to provide a second adjustment to the image data signal. The second adjustment is configured to adjust the image data signal to compensate for an operational characteristic difference between row pixels and column pixels of the display panel. The source driver includes an output buffer to supply the image data signal to the pixel electrodes.
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29.发明授权公开(公告)号：US09806608B2
公开(公告)日：2017-10-31
申请号：US15043405
申请日：2016-02-12
Applicant: Apple Inc.
Inventor： Weijun Yao , David A. Stronks , Hopil Bae , Kingsuk Brahma , Wei Hsin Yao , Yafei Bi , Yingxuan Li
CPC classification number: H02M3/07 , G06F1/3262 , G06F3/041 , G06F3/0412 , G06F3/0416 , G06F3/044 , H01L23/642
Abstract: A charge pump that can be configured to operate in a first mode and a second mode is disclosed. The charge pump can comprise a charging capacitor coupled to a first node and configured to transfer a first DC voltage to the first node. The charge pump can also comprise a first output node and a second output node coupled to the first node. During the first mode, the first output node can be configured to output a second DC voltage based on the first DC voltage, and the second output node can be configured to output a third DC voltage based on the first DC voltage. During the second mode, the first output node can be configured to output the second DC voltage, and the second output node can be configured to output an AC voltage, the AC voltage being offset by the third DC voltage.
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公开(公告)号：US09690432B2
公开(公告)日：2017-06-27
申请号：US14059427
申请日：2013-10-21
Applicant: Apple Inc.
Inventor： Weijun Yao , Yingxuan Li , Ahmad Al-Dahle
CPC classification number: G06F3/044 , G06F3/0416
Abstract: Systems and processes for encoding and decoding touch signals output by a touch sensor are provided. In one example system, switching circuitry can be used to selectively couple each of the sense lines of a touch sensor to a positive terminal or a negative terminal of a sense amplifier based on the values of the elements of a matrix. The touch signals can be amplified and converted into digital form using a single sense amplifier and an ADC before being decoded using decoding circuitry. The decoding circuitry can decode the digital encoded touch signals by multiplying the digital encoded touch signals by each column of an inverse of the matrix used to encode the touch signals. The result of the decoding can be a set of signals that are representative of the touch signals output by the touch sensor.
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