公开(公告)号：US11817194B2

公开(公告)日：2023-11-14

申请号：US16993472

申请日：2020-08-14

Applicant: PixArt Imaging Inc.

Inventor： Sung-Han Wu ,  Yi-Hsien Ko

IPC: G16H20/10 ,  G16Y40/10 ,  G16Y20/40 ,  G16Y10/60 ,  G06F16/955 ,  G16Y10/80 ,  G16Y20/10

CPC classification number: G16H20/10 ,  G06F16/9554 ,  G16Y10/60 ,  G16Y10/80 ,  G16Y20/10 ,  G16Y20/40 ,  G16Y40/10

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.

公开(公告)号：US11226705B2

公开(公告)日：2022-01-18

申请号：US16988908

申请日：2020-08-10

Applicant: PixArt Imaging Inc.

Inventor： Sung-Han Wu

IPC: G06F3/044 ,  G06F3/041

Abstract: A capacitive touch system including a drive end, a capacitive touch sensing device and a detection end is provided. The drive end inputs a modulated drive signal into an input channel of the capacitive sensing device, wherein the modulated drive signal includes a plurality of driving frequencies. The detection end detects a detection signal of an output channel of the capacitive sensing device and generates a two-dimensional detection vector corresponding to each of the driving frequencies.

公开(公告)号：US10962426B2

公开(公告)日：2021-03-30

申请号：US16807967

申请日：2020-03-03

Applicant: PIXART IMAGING INC.

Inventor： Sung-Han Wu

IPC: G01L1/14 ,  G01L9/00 ,  G01L25/00 ,  G01L27/00

Abstract: The present disclosure illustrates a calibration circuit for a pressure sensing device. The calibration circuit, via at least one passive component installed in the pressure sensing device, obtains a calibration gain factor of at least one converter also installed in the pressure sensing device, and when the pressure sensing device is in a regular operating mode, the calibration gain factor can be used to calibrate the output of the converter, so that a sensing signal inputted into the pressure sensing device can be correctly converted to a relevant pressure value.

公开(公告)号：US09952732B2

公开(公告)日：2018-04-24

申请号：US15176687

申请日：2016-06-08

Applicant: PixArt Imaging Inc.

Inventor： Sung-Han Wu ,  Yu-Han Chen ,  Ming-Hung Tsai ,  Meng-Lin Yu ,  Hsin-Chia Chen

IPC: G06F3/045 ,  G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0418

Abstract: There is provided a capacitive touch device including a touch panel, a detection circuit and a processing unit. The touch panel includes a plurality of drive electrodes and a plurality of receiving electrodes configured to form a coupling electric field with an external touch panel, and the receiving electrodes are respectively configured to output a detection signal. The detection circuit is coupled to one of the receiving electrodes and configured to modulate the detection signal with two signals to generate two detection components. The processing unit is configured to obtain a phase value according to the two detection components to accordingly decode transmission data.

公开(公告)号：US11863174B2

公开(公告)日：2024-01-02

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.

公开(公告)号：US11611344B2

公开(公告)日：2023-03-21

申请号：US17891172

申请日：2022-08-19

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.

公开(公告)号：US10831304B2

公开(公告)日：2020-11-10

申请号：US15635010

申请日：2017-06-27

Applicant: PixArt Imaging Inc.

Inventor： Sung-Han Wu

IPC: G06F3/044 ,  G06F3/041

Abstract: There is provided a capacitive touch device including a touch panel and a control chip. The touch panel includes detection electrodes configured to form self-capacitance and mutual-capacitance. 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 electrodes to output a differential detected signal, and identifies a touch event according to the differential detected signal to reduce the power consumption for touch detection.

公开(公告)号：US10534476B2

公开(公告)日：2020-01-14

申请号：US15718023

申请日：2017-09-28

Applicant: PIXART IMAGING INC.

Inventor： Sung-Han Wu ,  Ming-Hung Tsai ,  Che-Chia Hsu

IPC: G06F3/041 ,  G06F3/047 ,  G06F3/044

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.

公开(公告)号：US10063214B2

公开(公告)日：2018-08-28

申请号：US15347789

申请日：2016-11-10

Applicant: PixArt Imaging Inc.

Inventor： Sung-Han Wu ,  Chang-Yuan Liou

IPC: H03B1/00 ,  H03H11/12 ,  G06F3/041 ,  G06F3/044

CPC classification number: H03H11/126 ,  G06F3/0416 ,  G06F3/044 ,  H03H11/1217

Abstract: A programmable band-pass filter circuit, which is included by an analog front-end circuit and used for capacitance detection, includes an operational amplifier, an input resistor, a feedback resistor, and a feedback capacitor. The operational amplifier includes a first input coupled to a reference level, a second input, and an output. The input resistor has a first end coupled to a sensed capacitor and a second end coupled to the second input of the operational amplifier. The feedback resistor and feedback capacitor are connected between the second input of the operational amplifier and the output of the operational amplifier, respectively.

公开(公告)号：US12183443B2

公开(公告)日：2024-12-31

申请号：US18484454

申请日：2023-10-11

Applicant: PixArt Imaging Inc.

Inventor： Sung-Han Wu ,  Yi-Hsien Ko

IPC: G16H20/10 ,  G06F16/955 ,  G16Y10/60 ,  G16Y10/80 ,  G16Y20/10 ,  G16Y20/40 ,  G16Y40/10

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.