公开(公告)号：US20180107309A1

公开(公告)日：2018-04-19

申请号：US15297540

申请日：2016-10-19

Applicant: SYNAPTICS INCORPORATED

Inventor： Kazuya ENDO ,  Shinobu NOHTOMI ,  Nobukazu TANAKA ,  Tomohiro HIRAKAWA ,  Hiroshi TAKEYAMA ,  Takayuki NOTO ,  Petr SHEPELEV

IPC: G06F3/041 ,  H03K17/96 ,  G09G3/36

CPC classification number: G06F3/0412 ,  G06F3/0416 ,  G09G3/3614 ,  G09G3/3655 ,  G09G2310/0289 ,  G09G2310/08 ,  G09G2330/02

Abstract: The semiconductor device is intended for connection with an in-cell type display touch panel having a plurality of common electrodes, a reference voltage for display is applied to the common electrodes in a display drive period, and the common electrodes serve as sensor electrodes in a touch detection period. The semiconductor device includes a DC level shift circuit operable to shift the DC level of a toggle signal output by a toggle drive circuit to the reference voltage. The semiconductor device supplies the reference voltage to the common electrodes of the display touch panel in the display drive period, and performs a guarding action in which at least a part of the plurality of common electrodes is supplied with a toggle signal shifted in DC level in the touch detection period.

公开(公告)号：US20180113534A1

公开(公告)日：2018-04-26

申请号：US15789103

申请日：2017-10-20

Applicant: Synaptics Incorporated

Inventor： Nobukazu TANAKA ,  Takayuki NOTO ,  Tetsuo TANEMURA

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: A sensing system includes: a transmitter circuitry configured to transmit drive signals to N sensors, N being a positive integer; N receiver circuitries configured to receive in parallel N sense signals generated in response to the drive signals by N sensors, N being a positive integer; N modulation circuitries configured to modulate outputs of the N receiver circuitries; a mixer circuitry configured to mix outputs of the N modulation circuitries; an A/D converter circuitry configured to receive an output of the mixer circuitry; and a demodulation circuitry. The demodulation circuitry is configured to demodulate an output of the A/D converter circuitry to generate N digital sense values corresponding to the N sense signals.

公开(公告)号：US20180074641A1

公开(公告)日：2018-03-15

申请号：US15673358

申请日：2017-08-09

Applicant: Synaptics Incorporated

Inventor： Nobukazu TANAKA ,  Takayuki NOTO ,  Tetsuo TANEMURA

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F3/0418 ,  G06F3/044

Abstract: Provided is a touch sensing circuit configured to sense an approach of a conductive object toward a sensor capacitor through measuring a sensor response signal generated by the sensor capacitor in response to a sensing wave signal applied to the sensor capacitor. The touch sensing circuit is connectable to a conversion circuit and a touch detection circuit. The conversion circuit calculates a response signal vector for a frequency component of the sensing wave signal by converting the response signal into a frequency domain representation. The touch sensing circuit includes a baseline vector manager circuit holding a baseline vector and a vector subtraction circuit, and calculates a delta vector which is the vector difference between the baseline vector and the response signal vector received from the conversion circuit. The touch detection circuit detects an approach of a conductive object towards the sensor capacitor on the basis of the calculated delta vector.

公开(公告)号：US20170343386A1

公开(公告)日：2017-11-30

申请号：US15467332

申请日：2017-03-23

Applicant: SYNAPTICS INCORPORATED

Inventor： Nobukazu TANAKA ,  Takayuki NOTO ,  Tetsuo TANEMURA

IPC: G01D5/24

CPC classification number: G01D5/24 ,  G06F3/0416 ,  G06F3/044 ,  H03K17/955 ,  H03K2217/960735

Abstract: A touch sensing circuit operable to sense a conductor approaching a sensor capacitance by measuring a response signal obtained from the sensor capacitance according to an applied detection signal includes an A/D converter and a Fourier transform device. The A/D converter samples the response signal with a predetermined cycle, followed by conversion to a digital value and outputs as time-series response data. The Fourier transform device calculates, from the time-series response data, a result of transformation at a detection frequency representing the reciprocal of a cycle of the detection signal and outputs it. The touch sensing circuit converts the response signal to the frequency domain, calculates only components (harmonics or others as needed) of a frequency equal to that of the detection signal required for touch sensing, and supplies them for a touch coordinate calculation process in a subsequent stage.

公开(公告)号：US20190064956A1

公开(公告)日：2019-02-28

申请号：US15687841

申请日：2017-08-28

Applicant: SYNAPTICS INCORPORATED

Inventor： Tetsuo TANEMURA ,  Nobukazu TANAKA ,  Takayuki NOTO

IPC: G06F3/044 ,  G06F3/041 ,  G09G3/20 ,  G01R27/26 ,  H03K17/955 ,  H03K17/96

CPC classification number: G06F3/044 ,  G01R27/2605 ,  G06F3/0412 ,  G06F3/0416 ,  G06F2203/04104 ,  G09G3/2055 ,  H03K17/955 ,  H03K17/962 ,  H03K17/9622 ,  H03K2217/960775

Abstract: Embodiments described herein include a method for detecting a presence of an input in a capacitive sensing device that includes a sensing region and a plurality of sensor electrodes. The method includes driving a first column of transmitter sensor electrodes at a first potential and driving a second column of transmitter sensor electrodes at a second potential different than the first potential. The method includes acquiring a measurement from each row of sensor electrodes, where a first sensing node includes the first column of transmitter sensor electrodes and a third column of receiver sensor electrodes, and a second sensing node includes the second column of transmitter sensor electrodes and a fourth column of receiver sensor electrodes. The method also includes determining, using the measurements from each row of sensor electrodes, a first set of transcapacitive measurements corresponding to the plurality of sensor electrodes.

公开(公告)号：US20180107317A1

公开(公告)日：2018-04-19

申请号：US15782508

申请日：2017-10-12

Applicant: SYNAPTICS INCORPORATED

Inventor： Nobukazu TANAKA ,  Takayuki NOTO ,  Masaaki SHIOMURA

IPC: G06F3/041 ,  G06F3/044 ,  G09G3/20

CPC classification number: G06F3/0412 ,  G06F3/0416 ,  G06F3/044 ,  G09G3/2092 ,  G09G3/3225 ,  G09G3/3611 ,  G09G3/3655 ,  G09G3/3677 ,  G09G3/3696 ,  G09G2330/028

Abstract: A display driver includes: a plurality of source output terminals configured to be connected to a plurality of source input terminals of a display panel; a source driver circuitry configured to generate source signals to the source input terminals; a plurality of interconnections connected to a capacitance detection circuitry for touch sensing in a sensing region of the display panel, and a selector. The selector is configured to selectively connect the source output terminals to the source driver circuitry and the interconnections.

公开(公告)号：US20210026490A1

公开(公告)日：2021-01-28

申请号：US17062529

申请日：2020-10-02

Applicant: SYNAPTICS INCORPORATED

Inventor： Xueyong YANG ,  Tetsuo TANEMURA ,  Nobukazu TANAKA ,  Takayuki NOTO

IPC: G06F3/041 ,  G06F3/044

Abstract: A semiconductor device comprises driver circuitry, an analog-digital (AD) converter, and processing circuitry. The driver circuitry is configured to supply a drive signal to a sensor array in a sensing frame comprising 2N bursts, N being an integer of two or more. The mixer circuitry is configured to modulate a plurality of carrier waves with a plurality of sensing signals corresponding to capacitances of a plurality of sensing electrodes of the sensor array, respectively, to output a plurality of mixer outputs. A number of the plurality of sensing electrodes is 2N−1 or 2N. The AD converter is configured to perform AD conversion on a sum signal of the plurality of mixer outputs. The processing circuitry is configured to detect an object based on the output of the AD converter.

公开(公告)号：US20200050320A1

公开(公告)日：2020-02-13

申请号：US16533490

申请日：2019-08-06

Applicant: SYNAPTICS INCORPORATED

Inventor： Xueyong YANG ,  Tetsuo TANEMURA ,  Nobukazu TANAKA ,  Takayuki NOTO

IPC: G06F3/041 ,  G06F3/044

Abstract: A semiconductor device comprises driver circuitry, an analog-digital (AD) converter, and processing circuitry. The driver circuitry is configured to supply a drive signal to a sensor array in a sensing frame comprising 2N bursts, N being an integer of two or more. The mixer circuitry is configured to modulate a plurality of carrier waves with a plurality of sensing signals corresponding to capacitances of a plurality of sensing electrodes of the sensor array, respectively, to output a plurality of mixer outputs. A number of the plurality of sensing electrodes is 2N−1 or 2N. The AD converter is configured to perform AD conversion on a sum signal of the plurality of mixer outputs. The processing circuitry is configured to detect an object based on the output of the AD converter.

公开(公告)号：US20200042119A1

公开(公告)日：2020-02-06

申请号：US16446295

申请日：2019-06-19

Applicant: SYNAPTICS INCORPORATED

Inventor： Nobukazu TANAKA ,  Takayuki NOTO ,  Tetsuo TANEMURA

IPC: G06F3/044

Abstract: A semiconductor device comprises first mixer circuitry and processing circuitry. The first mixer circuitry is configured to generate a plurality of first mixer outputs through quadrature decomposition of a sensing signal. The first sensing signal corresponds to a capacitance of a first sensing electrode supplied with a drive signal. The quadrature decomposition is based on an in-phase local carrier which is in phase with the drive signal and an out-of-phase local carrier having a phase different from that of the in-phase local carrier. The plurality of first mixer outputs comprises an in-phase mixer output generated based on the in-phase local carrier and the sensing signal, and an out-of-phase mixer output generated based on the out-of-phase local carrier and the sensing signal.

公开(公告)号：US20180173465A1

公开(公告)日：2018-06-21

申请号：US15842543

申请日：2017-12-14

Applicant: SYNAPTICS INCORPORATED

Inventor： Nobukazu TANAKA ,  Takayuki NOTO ,  Masaaki SHIOMURA

IPC: G06F3/06 ,  G06F3/0488 ,  G06F13/40

CPC classification number: G06F3/0659 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/0488 ,  G06F9/4411 ,  G06F13/4022 ,  G09G5/00 ,  G09G5/006 ,  G09G2330/026

Abstract: A semiconductor device including a first data terminal, a data output terminal, a control circuitry, first and second communication interfaces, and a bridge circuitry. The bridge circuitry is configured to operate a normal mode and a bridge mode. In the normal mode, the data output terminal is connected to the second communication interface circuitry, and in the bridge mode, the first data terminal is connected to the data output terminal in a bridge mode.