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    Pixel circuit outputting pulse width signal and optical sensor using the same
    41.
    发明授权
    Pixel circuit outputting pulse width signal and optical sensor using the same 有权

    公开(公告)号：US12058467B2

    公开(公告)日：2024-08-06

    申请号：US18244296

    申请日：2023-09-11

    Applicant: PixArt Imaging Inc.

    Inventor： Ren-Chieh Liu ,  Chih-Huan Wu ,  Yi-Hsien Ko ,  Han-Chi Liu

    IPC: H04N25/772 ,  H01L27/146

    CPC classification number: H04N25/772 ,  H01L27/14643

    Abstract: There is provided a pixel circuit for performing analog operation including a photodiode, a first temporal circuit, a second temporal circuit and an operation circuit. Within a first interval, the photodiode detects first light energy to be stored in the first temporal circuit. Within a second interval, the photodiode detects second light energy to be stored in the second temporal circuit. Within an operation interval, the first temporal circuit outputs a first detection signal having a first pulse width according to the first light energy and outputs a second detection signal having a second pulse width according to the second light energy for being calculated by the operation circuit.

    Optical sensor which can reduce image flicker
    44.
    发明授权
    Optical sensor which can reduce image flicker 有权

    公开(公告)号：US12047687B2

    公开(公告)日：2024-07-23

    申请号：US17889366

    申请日：2022-08-16

    Applicant: PixArt Imaging Inc.

    Inventor： Chih-Huan Wu

    IPC: H04N23/745 ,  H04N23/73 ,  H04N23/743 ,  H04N25/583 ,  H04N25/75

    CPC classification number: H04N23/745 ,  H04N23/73 ,  H04N23/743 ,  H04N25/583 ,  H04N25/75

    Abstract: An optical sensor, for sensing a sensing frame corresponding to a flicker period of ambient light, comprising: a pixel array, configured to perform N times of exposure operations via at least one pixel of the pixel array in N exposure time intervals to generate N sub-frames, wherein a summation of the N exposure time intervals equals to a sensing interval and the sensing interval is less than or identical to a first flicker period. The optical sensor adds the N sub-frames to generate a summing sub-frame. The sensing frame comprises the summing sub-frame. The adding operation can also be performed to digital signals generated from the sub-frames. The influences caused by the fluctuation of ambient light can be neutralized, since the frame or portion of the frame is sensed at least twice at different phases of a single flicked period. By this way, the conventional flicker issue can be improved.

    Smoke detection device with preferred detection accuracy
    45.
    发明授权
    Smoke detection device with preferred detection accuracy 有权

    公开(公告)号：US12046114B2

    公开(公告)日：2024-07-23

    申请号：US17741459

    申请日：2022-05-11

    Applicant: PixArt Imaging Inc.

    Inventor： Yen-Chang Chu ,  Yen-Po Chen ,  Chih-Ming Sun ,  Cheng-Nan Tsai ,  Ching-Kun Chen

    IPC: G08B17/10 ,  G08B17/107

    CPC classification number: G08B17/107

    Abstract: A smoke detection device includes a housing, a smoke collector, an optical detector and a cover plate. The housing has a piercing hole. The smoker collector has a smoke hole, and position of the smoke hole is close to position of the piercing hole. The optical detector is disposed inside the smoke collector and adapted to detect gaseous concentration inside the smoke collector. The cover plate is disposed between the housing and the smoke collector, and used to set a channel from the piercing hole to the smoke hole, so that gaseous matter flows from outside the smoke detection device into the smoke collector through the piercing hole and the smoke hole.

    Method for eliminating misjudgment of reflective light and optical sensing system
    46.
    发明授权
    Method for eliminating misjudgment of reflective light and optical sensing system 有权

    公开(公告)号：US12036668B2

    公开(公告)日：2024-07-16

    申请号：US18381108

    申请日：2023-10-17

    Applicant: PIXART IMAGING INC.

    Inventor： Guo-Zhen Wang

    IPC: B25J19/02 ,  G01S17/04

    CPC classification number: B25J19/021 ,  G01S17/04 ,  A47L2201/04

    Abstract: A method for eliminating misjudgment of a reflective light is provided. A light source emits a transverse linear light toward a direction of a floor as detection light and the light sensor senses reflective light signals from an object that reflects the detection light. In the method, a frame image including the reflective light signals is captured by the light sensor, centers of gravity of the reflective light signals are analyzed, and the centers of gravity of the reflective light signals can be corrected based on a line of gravity or a center of gravity of previous reflective light signals stored in a memory of the autonomous robot in order to exclude a center of gravity generated by the reflective light signal from a wall. A distance of the object can be confirmed based on the corrected centers of gravity of reflective light signals.

    METHOD AND STRUCTURE FOR ALIGNMENT OF LENS TO OPTICAL PRODUCT AT PCBA LEVEL
    48.
    发明公开
    METHOD AND STRUCTURE FOR ALIGNMENT OF LENS TO OPTICAL PRODUCT AT PCBA LEVEL 审中-公开

    公开(公告)号：US20240206052A1

    公开(公告)日：2024-06-20

    申请号：US18592392

    申请日：2024-02-29

    Applicant: PixArt Imaging Inc.

    Inventor： Wan Piang LIM ,  Sai Mun LEE

    IPC: H05K1/02 ,  H05K3/04

    CPC classification number: H05K1/0274 ,  H05K3/041 ,  H05K2201/10121 ,  H05K2201/10151

    Abstract: An optical package includes: a Printed Circuit Board (PCB) including a plurality of cut-out sections; a lens, including a first plurality of protrusions corresponding respectively to the plurality of cut-out sections, wherein the first plurality of protrusions includes three protrusions being guide posts, a first protrusion of the first plurality of protrusions is formed on a first side of the lens, and a second protrusion of the first plurality of protrusions is formed on a second side of the lens opposite to the first side, and when the lens is placed under the PCB, the first plurality of protrusions will pass through the cut-out sections; and a sensor for attaching on to the lens and the PCB.

    Circuit carrier
    49.
    发明授权
    Circuit carrier 有权

    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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