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    Distance-measuring device with increased signal-to-noise ratio and method thereof
    41.
    发明申请
    Distance-measuring device with increased signal-to-noise ratio and method thereof 有权
    具有增加的信噪比的距离测量装置及其方法

    公开(公告)号：US20130335726A1

    公开(公告)日：2013-12-19

    申请号：US13974011

    申请日：2013-08-22

    Applicant: PixArt Imaging Inc.

    Inventor： En-Feng Hsu ,  Yen-Min Chang

    IPC: G01C3/08

    CPC classification number: G01C3/08 ,  G01S7/491 ,  G01S7/497 ,  G01S17/08

    Abstract: A method of increasing signal-to-noise ratio of a distance-measuring device includes a light-emitting component emitting a detecting light to a measured object during an emitting period for generating a reflected light, a delay period after the light-emitting component emitting the detecting light, a light-sensing component sensing the energy of the reflected light to generate a light-sensing signal, and obtaining a measured distance between the distance-measuring device and the measured object according to the energy of the detecting light and the light-sensing signal. Since the measured distance is longer than a predetermined shortest measured distance, the method can accordingly calculate a proper delay period for ensuring that the reflected light reaches the light-sensing component after the delay period. In this way, the light-sensing component does not sense the background light during the delay period, so that the signal-to-noise ratio of the light-sensing signal is improved.

    Abstract translation: 一种提高距离测量装置的信噪比的方法包括在用于产生反射光的发光周期期间向测量对象发射检测光的发光部件，发光部件发射后的延迟时间 检测光，检测反射光的能量以产生光感测信号的光感测部件，以及根据检测光和光的能量获得距离测量装置和被测量物体之间的测量距离 传感信号。 由于测量距离长于预定的最短测量距离，因此该方法可以相应地计算适当的延迟周期，以确保在延迟周期之后反射光到达光感测部件。 以这种方式，在延迟时段期间，感光元件不会感测到背景光，从而提高了光感测信号的信噪比。

    Distance-measuring device of measuring distance according to variation of imaging location and calibrating method thereof
    42.
    发明申请
    Distance-measuring device of measuring distance according to variation of imaging location and calibrating method thereof 有权

    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

    CPC classification number: G01C3/08 ,  G01C3/085

    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.

    Optical sensor having opaque layer
    43.
    发明授权
    Optical sensor having opaque layer 有权

    公开(公告)号：US12273649B2

    公开(公告)日：2025-04-08

    申请号：US18401745

    申请日：2024-01-02

    Applicant: PixArt Imaging Inc.

    Inventor： Jung-Tai Lin ,  En-Feng Hsu

    IPC: H04N5/33 ,  H04N23/667 ,  H04N23/71 ,  H04N23/74

    Abstract: An optical sensor including a pixel matrix and an opaque layer is provided. The pixel matrix includes a plurality of unblocked pixels, a first pixel and a second pixel, which is arranged at a side of the first pixel in a row direction of the pixel matrix. The opaque layer covers upon a first region, which is a part of the first pixel, and upon a second region, which is a part of the second pixel, but does not cover upon the unblocked pixels, wherein the first region and the second region are symmetrically arranged in the row direction, and uncovered regions of the first pixel and the second pixel are arranged to be larger at a pixel edge than at a pixel center in a column direction of the pixel matrix.

    OPTICAL SENSOR WHICH CAN REDUCE POWER NOISE AND POWER NOISE REDUCTION METHOD
    44.
    发明公开
    OPTICAL SENSOR WHICH CAN REDUCE POWER NOISE AND POWER NOISE REDUCTION METHOD 审中-公开

    公开(公告)号：US20240247979A1

    公开(公告)日：2024-07-25

    申请号：US18098719

    申请日：2023-01-19

    Applicant: PixArt Imaging Inc.

    Inventor： En-Feng Hsu

    IPC: G01J1/44 ,  H02M3/158

    CPC classification number: G01J1/44 ,  H02M3/158 ,  G01J2001/444

    Abstract: An optical sensor, comprising: a sensor array, comprising a bright region with at least one bright pixel and comprising a dark region with at least one dark pixel, wherein the dark pixel generates a sensing signal that is non-relevant to light emitted to the sensor array; a power noise detection circuit, configured to compute a power noise level of the sensing signal from the dark pixel; and a power noise compensation circuit, configured to control the optical sensor to perform a power noise compensation operation according to the power noise level. A related power noise reduction method is also disclosed. Based on the present invention, the power noise of the optical sensor can be reduced without increasing the power consumption, and the power noise for a low switch frequency can also be improved.

    Optical module having symmetrical opaque layer
    46.
    发明授权
    Optical module having symmetrical opaque layer 有权

    公开(公告)号：US11917322B2

    公开(公告)日：2024-02-27

    申请号：US17860352

    申请日：2022-07-08

    Applicant: PixArt Imaging Inc.

    Inventor： Jung-Tai Lin ,  En-Feng Hsu

    IPC: H04N5/33 ,  H04N23/71 ,  H04N23/74 ,  H04N23/667

    CPC classification number: H04N5/33 ,  H04N23/667 ,  H04N23/71 ,  H04N23/74

    Abstract: An optical module including a light source and an optical sensor is provided. The optical sensor includes a pixel matrix and an opaque layer. The pixel matrix includes a plurality of unblocked pixels, a plurality of first pixels and a plurality of second pixels. The opaque layer covers upon a first region, which is a part of each first pixel, and upon a second region, which is a part of each second pixel, but does not cover upon the unblocked pixels, wherein the first region and the second region are symmetrically arranged in a first direction, and uncovered regions of the first pixels and the second pixels are arranged to be larger at a pixel edge than at a pixel center.

    Sensing element having pixels exposed by aperture increasing along predetermined direction
    47.
    发明授权
    Sensing element having pixels exposed by aperture increasing along predetermined direction 有权

    公开(公告)号：US11747140B2

    公开(公告)日：2023-09-05

    申请号：US17351625

    申请日：2021-06-18

    Applicant: PixArt Imaging Inc.

    Inventor： En-Feng Hsu ,  Chia-Yu Liu

    IPC: G01C3/08 ,  G06F3/03 ,  G06F3/01

    CPC classification number: G01C3/08 ,  G06F3/017 ,  G06F3/0304

    Abstract: A sensing element includes a plurality of sensing pixel areas arranged in matrix, wherein each of the plurality of sensing pixel areas includes a first pixel, a second pixel, a first shielding layer, a second shielding layer and at least one micro lens. The second pixel is adjacent to the first pixel in a predetermined direction. The first shielding layer is disposed on the first pixel and has a first opening, wherein an aperture of the first opening increases along the predetermined direction from a center of the first pixel. The second shielding layer is disposed on the second pixel and has a second opening, wherein a shape of the second opening is mirror symmetrical with that of the first opening in the predetermined direction. The at least one micro lens is disposed on the first shielding layer and the second shielding layer.

    DEVICE ID SETTING METHOD AND ELECTRONIC DEVICE APPLYING THE DEVICE ID SETTING METHOD
    48.
    发明申请
    DEVICE ID SETTING METHOD AND ELECTRONIC DEVICE APPLYING THE DEVICE ID SETTING METHOD 有权

    公开(公告)号：US20230066270A1

    公开(公告)日：2023-03-02

    申请号：US17458574

    申请日：2021-08-27

    Applicant: PixArt Imaging Inc.

    Inventor： En-Feng Hsu ,  Shiaw-Yu Jou ,  Tien-Chung Yang

    IPC: G11C7/10

    Abstract: An electronic device comprising: a clock pin; at least one data pin; a storage device, configured to store at least one program; a processing circuit, coupled to the clock pin and the data pin. A device ID setting method is performed when the processing circuit executes the program stored in the storage device. The device ID setting method comprises; (a) recording connections between pins between the first electronic device and the second electronic device by the second electronic device; (b) applying the connections as a device ID of the first electronic device by the second electronic device; and (c) setting pins of the first electronic device such that the data pins of the second electronic device are coupled to the data pins of the first electronic device.

    Optical touch device and operation method thereof
    50.
    发明授权
    Optical touch device and operation method thereof 有权

    公开(公告)号：US10379677B2

    公开(公告)日：2019-08-13

    申请号：US15879264

    申请日：2018-01-24

    Applicant: PixArt Imaging Inc.

    Inventor： Yu-Hao Huang ,  Ming-Tsan Kao ,  En-Feng Hsu ,  Yi-Yuan Chen ,  Meng-Huan Hsieh

    IPC: G06F3/042 ,  G06F3/01 ,  G06F9/00 ,  G06F3/03 ,  G06F3/041 ,  G06K9/00

    Abstract: An operation method of an optical touch device includes: emitting, by a light emitting unit, a light beam to illuminate an object; capturing, by an image sensing device, an image of the object reflecting the light beam; selecting all pixels in the image having a brightness greater than or equal to a brightness threshold; sorting the selected pixels along a first coordinate axis of the image, a second coordinate axis of the image or based a pixel brightness; selecting the top first predetermined ratio of pixels from the sorted pixels as an object image of the object; and calculating a gravity center of the object image according to positions of the top first predetermined ratio of pixels or according to the positions of the top first predetermined ratio of pixels with a weight of pixel brightness. An optical touch device is also provided.

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