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公开(公告)号：US20240038353A1
公开(公告)日：2024-02-01
申请号：US18484454
申请日：2023-10-11
Applicant: PixArt Imaging Inc.
Inventor： SUNG-HAN WU , YI-HSIEN KO
CPC classification number: G16H20/10 , G16Y40/10 , G16Y20/40 , G16Y10/60 , G06F16/9554 , G16Y10/80 , G16Y20/10
Abstract: There is provided a smart control system including a host, at least one sensor and an informing device. The host identifies the activity of a specific member according to the detection result of the at least one sensor, and informs the specific member to take medicine on time or avoid eating specific ingredients using the informing device.
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公开(公告)号：US20230208421A1
公开(公告)日：2023-06-29
申请号：US18111603
申请日：2023-02-20
Applicant: PixArt Imaging Inc.
Inventor： SUNG-HAN WU
IPC: H03K17/96
CPC classification number: H03K17/9622 , H03K2217/96074 , H03K2217/960715
Abstract: There is provided a detection chip including a charging circuit, a discharging circuit, a counter and a processor. The charging circuit provides a first charging current within a first charging interval, and provides a second charging current, smaller than the first charging current, within a second charging interval. The discharging circuit provides a first discharging current within a first discharging interval, and provides a second discharging current, smaller than the first discharging current, within a second discharging interval. The counter counts the second charging interval and the second discharging interval. The processor identifies a touch event according to the second charging interval and the second discharging interval.
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公开(公告)号：US20200371623A1
公开(公告)日：2020-11-26
申请号：US16991277
申请日：2020-08-12
Applicant: PixArt Imaging Inc.
Inventor： SUNG-HAN WU
Abstract: There is provided a capacitive touch device including a touch panel and a control chip. The touch panel includes a detection electrode configured to form a self-capacitor. The control chip includes an emulation circuit and a subtraction circuit. The emulation circuit is configured to output a reference signal. The subtraction circuit is coupled to the emulation circuit and the detection electrode, subtracts the reference signal outputted by the emulation circuit from a detected signal outputted by the detection electrode to output a differential detected signal, and identifies a touch event according to an amplified differential detected signal so as to improve the touch sensitivity.
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公开(公告)号：US20220021388A1
公开(公告)日：2022-01-20
申请号：US16930348
申请日：2020-07-16
Applicant: PixArt Imaging Inc.
Inventor： SUNG-HAN WU
IPC: H03K17/96
Abstract: There is provided a touch detection circuit including a charging circuit, a discharging circuit, a counter and a processor. The charging circuit charges a detection capacitor within a charging interval using different currents. The discharging circuit discharges the detection capacitor within a discharging interval using different currents. The counter counts the charging interval and the discharging interval. The processor subtracts a baseline time from a counted charging time and a counted discharging time to cancel the noise interference.
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公开(公告)号：US20180321792A1
公开(公告)日：2018-11-08
申请号：US15718023
申请日：2017-09-28
Applicant: PIXART IMAGING INC.
Inventor： SUNG-HAN WU , MING-HUNG TSAI , CHE-CHIA HSU
CPC classification number: G06F3/0418 , G06F3/044 , G06F3/047 , G06F2203/04111
Abstract: A compensation method for an induced amount in a touch sensor and a touch panel thereof are provided. The compensation method uses a fake finger circuit to simulate the situations when a user touches the sensing nodes of the touch sensor with a finger, and obtains the gain coefficient of each of the sensing nodes, which are used to compensate for the induced capacitance generated by the sensing nodes as a result of being touched by an external object. In this way, the extra effects caused by the difference in basic capacitance can be eliminated by the gain coefficient.
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Patent Agency Ranking
公开(公告)号：US20180074101A1
公开(公告)日：2018-03-15
申请号：US15663161
申请日：2017-07-28
Applicant: PIXART IMAGING INC.
Inventor： SUNG-HAN WU
CPC classification number: G01R27/2605 , G01L1/144 , G06F3/0416 , G06F3/044 , G06F3/045 , H03K17/962
Abstract: Disclosed is a capacitive pressure sensing circuit and a capacitance-to-voltage converter thereof. The pressure sensing circuit comprises a converter, a cancellation circuit and a signal processor. The cancellation circuit is connected between the converter and at least one capacitive pressure sensor. The cancellation circuit attenuates the inductive capacitance generated by the capacitive pressure sensor to prevent an overflow happening when the inductive capacitance received by the converter is too large, such that the converter can effectively output a voltage signal corresponding to the attenuated inductive capacitance.
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公开(公告)号：US20250123710A1
公开(公告)日：2025-04-17
申请号：US19001645
申请日：2024-12-26
Applicant: PixArt Imaging Inc.
Inventor： SUNG-HAN WU
Abstract: There is provided a capacitive touch control system adapted to detect low frequency signals, including a touch panel and an analog front end. The analog front end includes a frequency booster, which boosts a low frequency signal outputted by the touch panel using a variable reference frequency corresponding to different function symbols of the low frequency signal such that resistance of a resistor of an amplifier in the analog front end needs not to be increased thereby reducing the manufacturing cost and a leakage voltage drop on the resistor.
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公开(公告)号：US20230359304A1
公开(公告)日：2023-11-09
申请号：US18224587
申请日：2023-07-21
Applicant: PixArt Imaging Inc.
Inventor： SUNG-HAN WU
CPC classification number: G06F3/04166 , G06F3/044
Abstract: There is provided a capacitive touch control system adapted to detect low frequency signals, including a touch panel and an analog front end. The analog front end includes a frequency booster, which boosts a low frequency signal outputted by the touch panel using a variable reference frequency corresponding to different function symbols of the low frequency signal such that resistance of a resistor of an amplifier in the analog front end needs not to be increased thereby reducing the manufacturing cost and a leakage voltage drop on the resistor.
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公开(公告)号：US20230333667A1
公开(公告)日：2023-10-19
申请号：US17945204
申请日：2022-09-15
Applicant: PIXART IMAGING INC.
Inventor： YU-HAN CHEN , TSE-CHUNG SU , SUNG-HAN WU , XIAO-LIN CHUANG , CHI-CHIEH LIAO
IPC: G06F3/023
CPC classification number: G06F3/023
Abstract: An input method and a controller of a touch keyboard are provided. The input method includes: detecting a touch behavior performed on the touch keyboard, and identifying the touch behavior to determine whether to output mouse event data, keyboard event data or a combination of mouse event data and keyboard event data.
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公开(公告)号：US20210286462A1
公开(公告)日：2021-09-16
申请号：US17074697
申请日：2020-10-20
Applicant: PIXART IMAGING INC.
Inventor： SUNG-HAN WU , CHE-CHIA HSU
Abstract: A touch keyboard includes a key set, a capacitive touch sensor, and a pressure sensing circuit. The capacitive touch sensor is coupled to the key set and is configured to generate a sensing capacitance. The pressure sensing circuit is coupled to the capacitive touch sensor, configured to generate a pressure sensing value, and specifically includes a cancellation circuit. The cancellation circuit is configured to generate a cancellation signal, and enable a capacitor voltage converter in the pressure sensing circuit to output an analog voltage signal according to the sensing signal being added with the cancellation signal, and the content of the sensing signal is the sensing capacitance generated by the capacitive touch sensor.
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