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    Operation method of proximity sensor
    1.
    发明授权
    Operation method of proximity sensor 有权

    公开(公告)号：US11882637B2

    公开(公告)日：2024-01-23

    申请号：US17587035

    申请日：2022-01-28

    Applicant: SENSORTEK TECHNOLOGY CORP.

    Inventor： Meng-Yong Lin ,  Ming-Huang Liu ,  Jer-Hau Hsu ,  Cheng-Feng Liu

    IPC: H05B47/11 ,  H05B47/17 ,  H05B47/165 ,  H05B47/155

    CPC classification number: H05B47/11 ,  H05B47/155 ,  H05B47/165 ,  H05B47/17

    Abstract: An operation method of a proximity sensor comprises: controlling a light-emitting element by a processing circuit. Such control includes a plurality of light source on and light source off operations. An optical sensor receives light and outputs a sensing signal corresponding to the intensity of the light. The processing circuit computes the sensing signal to produce a sensing result. The plurality of light source on and light source off operations includes a group having two light sources on operations and two light sources off operations. The two light sources on operations in the group or the two light sources off operations in the group are performed consecutively. In this way, the ambient light components of the light source on and off operations may cancel out each other to reduce the ambient light components contained in the sensing results.

    Light sensor circuit
    4.
    发明授权
    Light sensor circuit 有权

    公开(公告)号：US11509322B2

    公开(公告)日：2022-11-22

    申请号：US17014253

    申请日：2020-09-08

    Applicant: SENSORTEK TECHNOLOGY CORP.

    Inventor： Jer-Hau Hsu ,  Ming-Huang Liu ,  Kian-Fu Wong

    IPC: H03M1/12 ,  G01J1/44

    Abstract: A light sensor circuit, which comprising a photodiode and a voltage follower. By setting the voltage follower to reduce the influence from the junction capacitance of the photodiode, a required time of a repeat integration module will not be influenced by the photodiode to efficiently keep the performance and the accuracy of the analog to digital converting device when the light sensor circuit is used to the analog to digital converting device in repeat operation.

    Proximity sensor operating method and proximity sensor applying the method
    5.
    发明授权
    Proximity sensor operating method and proximity sensor applying the method 有权

    公开(公告)号：US11116059B2

    公开(公告)日：2021-09-07

    申请号：US16862577

    申请日：2020-04-30

    Applicant: SensorTek technology Corp.

    Inventor： Meng-Yong Lin ,  Ming-Huang Liu

    IPC: H05B47/10 ,  H05B47/115 ,  H05B47/17

    Abstract: Disclosed is a proximity sensor operating method used in a proximity sensor comprising a light-emitting device. The method comprises: in a standby mode, when an output of the proximity sensor is a first sensing state, driving a driving current of the light-emitting device to comprise a first driving current; when the proximity sensor is triggered, a check mode is entered, the proximity sensor still outputs the first sensing state, and the driving current is switched to comprise a second driving current larger than the first driving current; and in the check mode, when the length of time/number of times of triggering the proximity sensor is larger than or equal to a threshold length/number, the output of the proximity sensor switches to the second sensing state, and returning to the standby mode in which the driving current comprises the first driving current.

    Analog-to-digital converting module for related light sensing device
    6.
    发明授权
    Analog-to-digital converting module for related light sensing device 有权

    公开(公告)号：US09634682B1

    公开(公告)日：2017-04-25

    申请号：US15050479

    申请日：2016-02-23

    Applicant: SensorTek technology Corp.

    Inventor： Tso-Sheng Tsai ,  Jer-Hau Hsu ,  Wen-Cheng Chen ,  Ming-Huang Liu

    IPC: H03M1/12 ,  H03M1/10 ,  H03M1/38 ,  G01J1/44

    CPC classification number: H03M1/46 ,  H03M1/14

    Abstract: An analog-to-digital module includes a sampling unit, for generating an output voltage between a positive output end and a negative output end according to a positive input voltage of a positive input end and a negative input voltage of a negative input end; a comparing unit, for generating a digital output signal according to magnitude relationship between the output voltage and a reference voltage; a variable current source, for generating a variable current according to the digital output signal at the negative input end in a first period according to a control signal; a measured current source, for generating a measured current at the negative input end; and an adjusting unit, for adjusting the output voltage according to the digital output signal in a second period according to the control signal; wherein the first period does not overlap the second period.

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