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公开(公告)号：US20240288969A1
公开(公告)日：2024-08-29
申请号：US18659022
申请日：2024-05-09
Applicant: PixArt Imaging Inc.
Inventor： MING-HUNG TSAI , Sung-Han Wu
CPC classification number: G06F3/04166 , G06F3/044
Abstract: There is provided a capacitive touch control system including a readout circuit and a touch panel. The touch panel includes multiple pixels arranged in a matrix, and is configured to operate in a first mode or a second mode. In the first mode, the touch panel time-divisionally detects a beacon frequency of a beacon symbol of the stylus pen signal within a first detection interval and performs a touch detection within a second detection interval corresponding to a beacon length interval of the beacon symbol. In the second mode, the readout circuit sequentially reads all pixel rows and pixel columns of the multiple pixels using a predetermined number of readout intervals within a positioning interval of the stylus pen signal, wherein in each of the readout intervals, each of multiple sub-circuits of the readout circuit reads one pixel row or one pixel column of the touch panel.
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公开(公告)号：US11592936B2
公开(公告)日：2023-02-28
申请号：US17021169
申请日：2020-09-15
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 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.
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公开(公告)号：US11411762B2
公开(公告)日：2022-08-09
申请号：US17030374
申请日：2020-09-24
Applicant: PixArt Imaging Inc.
Inventor： Sung-Han Wu , Yi-Hsien Ko
IPC: H04L12/28
Abstract: There is provided a smart home control system including a host, at least one sensor, a plurality of controlled devices and an informing device. The host identifies entering and leaving of family members according to detection results of the at least one sensor, and controls on/off of the controlled devices or informs a specific family member by the informing device to execute agenda according to a member ID of a family member who is identified to enter or leave the house. When identifying that one agendum is unable or forgotten to be executed by the specific family member, the host further rearranges the agendum.
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公开(公告)号：US11381418B2
公开(公告)日：2022-07-05
申请号：US16683946
申请日：2019-11-14
Applicant: PIXART IMAGING INC.
Inventor： Sung-Han Wu , Yi-Hsien Ko
IPC: H04L12/28
Abstract: There is provided a smart home control system including a host, at least one sensor, a plurality of controlled devices and an informing device. The host identifies entering and leaving of family members according to detection results of the at least one sensor, and controls on/off of the controlled devices or informs a specific family member by the informing device to execute agenda according to a member ID of a family member who is identified to enter or leave the house.
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Patent Agency Ranking
公开(公告)号：US10775945B2
公开(公告)日：2020-09-15
申请号：US16154153
申请日：2018-10-08
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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26.发明授权公开(公告)号：US10775939B2
公开(公告)日：2020-09-15
申请号：US15355266
申请日：2016-11-18
Applicant: PIXART IMAGING INC.
Inventor： Sung-Han Wu
IPC: G06F3/044
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.
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公开(公告)号：US10451662B2
公开(公告)日：2019-10-22
申请号：US15663161
申请日：2017-07-28
Applicant: PIXART IMAGING INC.
Inventor： Sung-Han Wu
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：US10430005B2
公开(公告)日：2019-10-01
申请号：US15893114
申请日：2018-02-09
Applicant: PixArt Imaging Inc.
Inventor： Sung-Han Wu , Yu-Han Chen , Ming-Hung Tsai , Meng-Lin Yu , Hsin-Chia Chen
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.
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公开(公告)号：US20180313883A1
公开(公告)日：2018-11-01
申请号：US15798405
申请日：2017-10-31
Applicant: PixArt Imaging Inc.
Inventor： Sung-Han Wu , Wooi Kip LIM , Kei Tee TIEW , KEEN-HUN LEONG
Abstract: A short circuit testing method for a capacitive sensing device including a plurality of sense lines and a plurality of drive lines includes: under a short circuit testing mode, coupling at least one first line in the sense lines and drive lines to a reference level; using a sensing circuit corresponding to a specific sense line to read out a testing resultant signal; and, comparing the testing resultant signal with a reference signal to determine whether a short circuit exists.
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