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公开(公告)号：US11418193B2
公开(公告)日：2022-08-16
申请号：US16843570
申请日：2020-04-08
Applicant: PIXART IMAGING INC.
Inventor： Che-Chia Hsu , Yu-Han Chen , Chi-Chieh Liao
IPC: H03K17/98 , H03K17/96 , H01H13/705 , H01H3/12 , G06F3/02
Abstract: A key unit and a keyboard using the same are provided. The key unit includes a circuit board, an elastic element, a keycap, and a processing circuit. The circuit board includes a capacitance sensing circuit embedded therein, and the capacitance sensing circuit includes a pair of sensor electrodes. The elastic element is disposed on the circuit board. The keycap is moveably disposed above and spaced apart from the circuit board. The elastic element is disposed between the keycap and the circuit board so that the keycap moves between a non-depressed position and a depressed position with respect to the circuit board. The processing circuit is electrically connected to the pair of sensor electrodes to obtain a variation of a coupling capacitance between the pair of sensor electrodes and to determine whether the keycap is touched or depressed according to the variation of coupling capacitance.
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公开(公告)号：US20210290158A1
公开(公告)日：2021-09-23
申请号：US17338618
申请日：2021-06-03
Applicant: PixArt Imaging Inc.
Inventor： Che-Chia Hsu , Jian-Cheng Liao , Yu-Han Chen , Chi-Chieh Liao
IPC: A61B5/00 , G04G21/02 , H03K17/955
Abstract: A wearable electronic device with a function of detecting a wearing state, comprising: a plurality of electrodes; a capacitance calculating circuit, coupled to the electrodes, configured to calculate capacitance variations generated by at least two of the electrode; and a wearing state determining circuit, coupled to the capacitance calculating circuit, configured to determine the wearing state according to the capacitance variations. The wearing state determining circuit determines that the user wears the wearable electronic device in a proper manner if the capacitance variations indicate at least two of the electrodes indicate the user touches wearing state determining circuit. By this way, the wearing state can be auto detected and the wearable electronic device can be correspondingly control according to the wearing state.
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公开(公告)号：US20210100502A1
公开(公告)日：2021-04-08
申请号：US16591651
申请日：2019-10-03
Applicant: PixArt Imaging Inc.
Inventor： Che-Chia Hsu , Jian-Cheng Liao , Yu-Han Chen , Chi-Chieh Liao
IPC: A61B5/00 , H03K17/955 , G04G21/02
Abstract: A wearable electronic device with a function of detecting a wearing state, comprising: at least one electrode; a capacitance calculating circuit, coupled to the electrode, configured to calculate a capacitance variation generated by at least one of the electrode; and a wearing state determining circuit, coupled to the capacitance calculating circuit, configured to determine the wearing state according to the capacitance variation. By this way, the wearing state can be auto detected and the wearable electronic device can be correspondingly control according to the wearing state.
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公开(公告)号：US11674862B2
公开(公告)日：2023-06-13
申请号：US17233806
申请日：2021-04-19
Applicant: PIXART IMAGING INC.
Inventor： Che-Chia Hsu , Yu-Han Chen , Chi-Chieh Liao
CPC classification number: G01L9/12 , G01L9/0005
Abstract: A pressure sensing unit, a capacitive hybrid sensor device, and an input apparatus using the same are provided. The pressure sensing unit for detecting pressing events includes a pressure sensing pad group and a floating conductive element. The pressure sensing pad group includes a first pressure sensing pad, a second pressure sensing pad, and a ground pad that are spaced apart from one another. The first and second pressure sensing pads are electrically shielded from each other by the ground pad. One among the floating conductive element and the pressure sensing pad group is configured to be movable in a movement direction relative to another one among the floating conductive element and the pressure sensing pad group. The floating conductive element overlaps with the pressure sensing pad group in the movement direction. Therefore, a signal-to-noise ratio can be increased and an erroneous detection can be prevented.
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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
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：US12175047B2
公开(公告)日：2024-12-24
申请号：US17897722
申请日：2022-08-29
Applicant: PIXART IMAGING INC.
Inventor： Che-Chia Hsu , Chi-Chieh Liao , Yu-Han Chen
IPC: G06F3/044 , G06F3/041 , H01L25/075
Abstract: A capacitive touchpad is provided, which includes a substrate module, a plurality of sensing electrodes, a plurality of driving electrodes and a plurality of light-emitting diode (LED) dies. The plurality of sensing electrodes and the plurality of driving electrodes form a touch sensing region of the capacitive touchpad, and the touch sensing region is divided into a plurality of sensing units having same areas. Each of the LED dies is arranged in two adjacent ones of the plurality of sensing units, and a position of each of the LED dies corresponds to one of the plurality of driving electrodes, and the LED dies are electrically isolated from the plurality of sensing electrodes and the plurality of driving electrodes.
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公开(公告)号：US12008205B1
公开(公告)日：2024-06-11
申请号：US18215559
申请日：2023-06-28
Applicant: PIXART IMAGING INC.
Inventor： Che-Chia Hsu , Chun-Lin Tseng , Yu-Han Chen
IPC: G06F3/044
CPC classification number: G06F3/0446 , G06F2203/04111
Abstract: A circuit carrier includes a substrate, a capacitive electrode layer, a plurality of metal pads and a plurality of bridges, and a plurality of conductive pillars. The capacitive electrode layer formed on a surface of the substrate and includes a plurality of first electrodes and a plurality of second electrodes. At least two of the first electrodes are connected to each other and be arranged across a die-bonding region of the substrate for separating at least two of the second electrodes that partially protrude from the die-bonding region to respectively form extensions. The metal pads and the bridges are formed on another surface of the substrate and are located outside of the die-bonding region. Each of the bridges connects two of the metal pads, and each of the conductive pillars is embedded in the substrate and connects one of the extensions and a corresponding one of metal pads.
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公开(公告)号：US11953400B2
公开(公告)日：2024-04-09
申请号：US18142055
申请日：2023-05-02
Applicant: PIXART IMAGING INC.
Inventor： Che-Chia Hsu , Yu-Han Chen , Chi-Chieh Liao
CPC classification number: G01L9/12 , G01L9/0005
Abstract: A pressure sensing unit is provided. The pressure sensing unit includes a membrane and a pressure sensing pad group. The membrane has a first surface and a second surface. The pressure sensing pad group includes a first pressure sensing pad, a second pressure sensing pad, and a ground pad that are spaced apart from one another. The ground pad and one among the first pressure sensing pad and the second pressure sensing pad are located at the first surface of the membrane, another one among the first pressure sensing pad and the second pressure sensing pad is located at the second surface of the membrane, and an orthographic projection of the ground pad projected onto a reference plane is located between orthographic projections of the first pressure sensing pad and the second pressure sensing pad that are projected onto the reference plane. Therefore, a signal-to-noise ratio can be increased and an erroneous detection can be prevented.
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公开(公告)号：US11051758B2
公开(公告)日：2021-07-06
申请号：US16591651
申请日：2019-10-03
Applicant: PixArt Imaging Inc.
Inventor： Che-Chia Hsu , Jian-Cheng Liao , Yu-Han Chen , Chi-Chieh Liao
IPC: A61B5/00 , G04G21/02 , H03K17/955 , G06F1/16
Abstract: A wearable electronic device with a function of detecting a wearing state, comprising: at least one electrode; a capacitance calculating circuit, coupled to the electrode, configured to calculate a capacitance variation generated by at least one of the electrode; and a wearing state determining circuit, coupled to the capacitance calculating circuit, configured to determine the wearing state according to the capacitance variation. By this way, the wearing state can be auto detected and the wearable electronic device can be correspondingly control according to the wearing state.
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公开(公告)号：US10972099B2
公开(公告)日：2021-04-06
申请号：US16744580
申请日：2020-01-16
Applicant: PixArt Imaging Inc.
Inventor： Sung-Han Wu , Che-Chia Hsu , Chia-Yi Lee
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. The capacitive touch system includes a touch panel or a touch keyboard.
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