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Patent Agency Ranking
公开(公告)号：US20240069667A1
公开(公告)日：2024-02-29
申请号：US17899570
申请日：2022-08-30
Applicant: Synaptics Incorporated
Inventor： Guozhong Shen , Chunbo Liu , Jonathan Ku
IPC: G06F3/041
CPC classification number: G06F3/04166 , G06F3/0446
Abstract: An input device that includes multiple electrodes disposed in a sensing region of the input device and a sensing circuit coupled to a first electrode and configured to detect an input object proximate the sensing region. The sensing circuit includes an amplifier having an inverting input coupled to the first electrode, a non-inverting input coupled to a drive signal, and an output generating a resulting signal. The sensing circuit includes a feedback capacitor coupled between the output and the inverting input of the amplifier. The drive signal comprises a first sinusoidal signal having a first operating frequency and a second sinusoidal signal having a second operating frequency. The resulting signal is determined by the feedback capacitor and a capacitance of the first electrode caused by the input object. The resulting signal generates a sensing signal on the first electrode.
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公开(公告)号：US10558838B2
公开(公告)日：2020-02-11
申请号：US15977717
申请日：2018-05-11
Applicant: Synaptics Incorporated
Inventor： Guozhong Shen , Syed Mahmud , Jonathan Ku
Abstract: Disclosed are systems and method for imaging an input object. An imaging device includes: a light source that emanates light to a sensing region in which the input object to be imaged is placed; a collimator filter layer; an image sensor array disposed below the collimator filter layer that blocks some light reflected from the input object while other light passes through apertures in the collimator filter layer and arrives at the image sensor array; and a controller configured to cause a first image of the input object to be captured with the light source turned on, and to transmit the first image to a processor associated with the electronic device to perform image matching against one or more template images before causing a second image of the input object to be captured with the light source turned off.
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公开(公告)号：US20240168584A1
公开(公告)日：2024-05-23
申请号：US18430947
申请日：2024-02-02
Applicant: Synaptics Incorporated
Inventor： Guozhong Shen , Chunbo Liu , Jonathan Ku
CPC classification number: G06F3/04166 , G06F3/0446
Abstract: A sensing circuit configured to detect an input object proximate to a sensing region of an input device is provided. The sensing circuit includes an amplifier having an output and is configured to output a resulting signal. The sensing circuit also includes a plurality of mixers configured to receive the resulting signal from the output of the amplifier and to generate a plurality of output signals. At least one output signal is selected based on a comparison of a signal-to-noise ratio of each of the plurality of output signals with a noise threshold. The at least one output signal is selected according to criteria relative to the noise threshold. The input object is detected using the selected at least one output signal.
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4.发明授权公开(公告)号：US11481076B2
公开(公告)日：2022-10-25
申请号：US17141483
申请日：2021-01-05
Applicant: Synaptics Incorporated
Inventor： Chunbo Liu , Selim Guncer , Osman Emir Erol , Jonathan Ku
Abstract: A method and apparatus of global coarse baseline correction (GCBC) for capacitive scanning. An input device may include a number (N) of sensor electrodes, a GCBC circuit, and detection circuitry. Each sensor electrode is associated with a respective channel. The GCBC circuit produces sensing signals in each of the N channels and the detection circuitry may detect changes in the capacitances of one or more sensor electrodes based on the sensing signals. In some implementations, the GCBC circuit may include a current source which outputs a first current, a transimpedance amplifier (TIA) which converts the first current to a sensing voltage, and a number (N) of resistors that can be coupled between the output of the TIA and the N sensor electrodes, respectively. The coupling of each resistor between the TIA and a respective sensor electrode produces a sensing signal in the channel associated with the sensor electrode.
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公开(公告)号：US11934612B1
公开(公告)日：2024-03-19
申请号：US17899570
申请日：2022-08-30
Applicant: Synaptics Incorporated
Inventor： Guozhong Shen , Chunbo Liu , Jonathan Ku
CPC classification number: G06F3/04166 , G06F3/0446
Abstract: An input device that includes multiple electrodes disposed in a sensing region of the input device and a sensing circuit coupled to a first electrode and configured to detect an input object proximate the sensing region. The sensing circuit includes an amplifier having an inverting input coupled to the first electrode, a non-inverting input coupled to a drive signal, and an output generating a resulting signal. The sensing circuit includes a feedback capacitor coupled between the output and the inverting input of the amplifier. The drive signal comprises a first sinusoidal signal having a first operating frequency and a second sinusoidal signal having a second operating frequency. The resulting signal is determined by the feedback capacitor and a capacitance of the first electrode caused by the input object. The resulting signal generates a sensing signal on the first electrode.
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