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公开(公告)号：US20240077350A1
公开(公告)日：2024-03-07
申请号：US18508265
申请日：2023-11-14
Applicant: PixArt Imaging Inc.
Inventor： Feng-Chi Liu , Chi-Chieh Liao , Guo-Zhen Wang , Hung-Ching Lai
IPC: G01F23/292 , G01F23/80
CPC classification number: G01F23/2928 , G01F23/80
Abstract: An optical detection device includes a first linear light source, a second linear light source, an optical sensor array and a processor. The first linear light source is adapted to project a first long strip illumination beam onto the target container. The second linear light source is adapted to project a second long strip illumination beam onto the target container, and the second long strip illumination beam is crossed with the first long strip illumination beam. The optical sensor array is adapted to receive a first long strip detection beam and a second long strip detection beam reflected from the target container. The processor is electrically connected to the optical sensor array. The processor is adapted to analyze intensity distribution of the first long strip detection beam and the second long strip detection beam to acquire a relative distance between the optical sensor array and the target container.
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公开(公告)号：US09207809B2
公开(公告)日：2015-12-08
申请号：US13856432
申请日：2013-04-03
Applicant: PixArt Imaging Inc.
Inventor： Tzung-Min Su , Chi-Chieh Liao , Han-Ping Cheng , Chih-Hsin Lin , Ming-Tsan Kao
CPC classification number: G06F3/042 , G06F3/0418 , G06F3/0428 , G06F2203/04104
Abstract: An optical touch control method includes steps of: providing a bright background from at least one edge of a touch surface in a first period; providing illumination light to the touch surface in a second period; capturing a first image of an indicator object blocking a portion of the bright background in the first period; and capturing a second image of the indicator object reflecting the illumination light in the second period. An optical touch system is also provided.
Abstract translation: 光学触摸控制方法包括以下步骤：在第一周期中从触摸表面的至少一个边缘提供明亮的背景; 在第二周期中向所述触摸表面提供照明光; 捕获在所述第一周期中阻挡所述明亮背景的一部分的指示对象的第一图像; 以及在所述第二周期中捕获反映所述照明光的所述指示对象的第二图像。 还提供了光学触摸系统。
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公开(公告)号：US20130293867A1
公开(公告)日：2013-11-07
申请号：US13939197
申请日：2013-07-11
Applicant: PixArt Imaging Inc.
Inventor： En-Feng Hsu , Chi-Chieh Liao , Chih-Hung Lu , Tsung-Yi Su
IPC: G01C3/08
Abstract: A distance-measuring device is utilized for measuring a measured distance between a measured object and the distance-measuring device. The distance-measuring device reduces the effect of a background light and a flicking light by removing the part corresponding to the background light and the flicking light from light-sensed signals generated by an image sensor of the distance-measuring device. In addition, the distance-measuring device calculates a calibrating parameter for calibrating an assemble-error angle of the distance-measuring device, according to an imaging location of a reflective light obtained by measuring a calibrating object with a predetermined distance. In this way, the distance-measuring device can correctly calculate out the measured distance.
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公开(公告)号：US11852519B2
公开(公告)日：2023-12-26
申请号：US17071986
申请日：2020-10-15
Applicant: PixArt Imaging Inc.
Inventor： Feng-Chi Liu , Chi-Chieh Liao , Guo-Zhen Wang , Hung-Ching Lai
IPC: G01F23/292 , G01F23/80
CPC classification number: G01F23/2928 , G01F23/80
Abstract: An optical detection device of detecting a target container includes a linear light source, an optical sensor array and a processor. The linear light source is adapted to project a long strip illumination beam onto the target container. The optical sensor array includes a plurality of sensing units arranged as a long strip adapted to receive a long strip detection beam reflected from the target container. The processor is electrically connected to the optical sensor array. The processor is adapted to analyze intensity distribution of the plurality of sensing units to acquire a relative distance between the optical sensor array and a rim of the target container.
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5.发明授权公开(公告)号：US11803273B2
公开(公告)日：2023-10-31
申请号：US17237326
申请日：2021-04-22
Applicant: PIXART IMAGING INC.
Inventor： Chi-Chieh Liao , Yi-Hsien Ko
CPC classification number: G06F3/04182 , G06F3/0446 , G06F3/04164 , G06F3/04186
Abstract: A touch sensor, a touch pad, a method for identifying an inadvertent touch event and a computer device are provided. A control circuit of the touch sensor identifies whether there is the inadvertent touch event in response to the touch signals that indicates at least one touch event applied to the touch pad having the touch sensor. In the method, the touch signals are discarded if the inadvertent touch event is identified when a touch position corresponding to the touch signals is within an object detection area defined for the touch pad, or the touch positions in response to the touch signals are reported to the computer device if a multi-touch event is identified when the touch positions are within a touch detection area defined for the touch pad.
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Patent Agency Ranking
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：US10955308B2
公开(公告)日：2021-03-23
申请号：US16746967
申请日：2020-01-20
Applicant: PixArt Imaging Inc.
Inventor： Yu-Han Chen , Chih-Wei Huang , Chi-Chieh Liao , Wei-Chung Wang
Abstract: A pressure measuring method, applied to a pressure measuring apparatus, comprising: measuring a first pressure sensing value when the pressure measuring apparatus operates at a first scan frequency and receives a first pressure; and measuring a second pressure sensing value when the pressure measuring apparatus operates a second scan frequency and receives the first pressure. The first pressure sensing value and the second pressure sensing value are different, and a change between the first pressure sensing value and the second pressure sensing value is according to a change between the first scan frequency and the second scan frequency. The first scan frequency and the second scan frequency are different. The pressure measuring method can further comprise a calibrating mechanism to compensate the sensed pressure. By this way, the pressure sensing value can be calibrated, to solve the issue that the pressure sensing values are affected by scan frequencies.
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公开(公告)号：US20190095689A1
公开(公告)日：2019-03-28
申请号：US15712161
申请日：2017-09-22
Applicant: PixArt Imaging Inc.
Inventor： Chi-Chieh Liao
IPC: G06K9/00
Abstract: An object tracking method applied to an object tracking system comprising an object sensing device, an object identifying device, and a control interface comprising an object sensing region and an object identifying region. The object tracking method comprises: (a) generating object sensing values via the object sensing device; (b) calculating a location for the object on the object sensing region according to the object sensing values; and (c) adjusting the location for the object if the object sensing device or the object identifying device determines at least part of the object is on the object identifying region. The step (c) can adjust the location for the object if the object will enter the object identifying region. By this way, the dead zone issue for the control interface can be avoided.
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