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    Control of linear trans-impedance amplifier (TIA) during settling after recovering from loss of signal in receiver
    1.
    发明授权
    Control of linear trans-impedance amplifier (TIA) during settling after recovering from loss of signal in receiver 有权

    公开(公告)号：US12126312B1

    公开(公告)日：2024-10-22

    申请号：US18359564

    申请日：2023-07-26

    Applicant: II-VI Delaware, Inc.

    Inventor： Dinup Sukumaran ,  Richard D. Davis

    IPC: H03G3/30 ,  G01J1/44 ,  H03F3/45

    CPC classification number: H03G3/30 ,  G01J1/44 ,  H03F3/45475 ,  G01J2001/446 ,  H03G2201/103

    Abstract: An optical device for optical signals comprises: a photodiode configured to receive the optical signals; and a linear transimpedance amplifier (TIA) having an input stage, an output stage, and at least one variable gain amplifier (VGA) provided between the input stage and the output stage. The optical device also comprises: an automatic gain control loop configured to rectify an output of the at least one VGA and compare the rectified output with a threshold gain setting to generate an automatic gain control voltage; and a detection circuitry being configured to detect a rate of change in the automatic gain control voltage and being configured to determine a first state indicative of an absence of the optical signals at the photodiode. At least in response to the determined first state, the detection circuitry is configured to disable the output stage of the linear TIA.

    DETECTION DEVICE
    2.
    发明公开
    DETECTION DEVICE 审中-公开

    公开(公告)号：US20240337530A1

    公开(公告)日：2024-10-10

    申请号：US18742015

    申请日：2024-06-13

    Applicant: Japan Display Inc. ,  The University of Tokyo

    Inventor： Keiichi SAITO ,  Takashi NAKAMURA ,  Gen KOIDE ,  Takao SOMEYA ,  Tomoyuki YOKOTA

    IPC: G01J1/44

    CPC classification number: G01J1/44 ,  G01J2001/446

    Abstract: According to an aspect, a detection device includes: a first detection circuit including a first photodiode sensitive to first light and a second photodiode sensitive to second light; and a second detection circuit including a third photodiode sensitive to third light. The first photodiode and the second photodiode are coupled in series and in opposite directions to form a first detection element. One end side of the first detection element is coupled to a first signal line via a first transistor. Another end side of the first detection element is configured to be supplied with a first drive signal. A cathode of the third photodiode is coupled to a second signal line via a second transistor. An anode of the third photodiode is configured to be supplied with a second drive signal.

    ELECTRONIC DEVICE
    4.
    发明公开
    ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20240210243A1

    公开(公告)日：2024-06-27

    申请号：US18596597

    申请日：2024-03-05

    Applicant: InnoLux Corporation

    Inventor： Yu-Tsung LIU ,  Wei-Ju LIAO ,  Wei-Lin WAN ,  Cheng-Hsueh HSIEH ,  Po-Hsin LIN ,  Te-Yu LEE

    IPC: G01J1/44 ,  G01J1/04 ,  G06V40/13 ,  H01L27/146

    CPC classification number: G01J1/44 ,  G01J1/0411 ,  G01J1/0437 ,  H01L27/14623 ,  H01L27/14627 ,  G01J2001/446 ,  G01J2001/4473 ,  G06V40/1318

    Abstract: An electronic device having a sensing region and a non-sensing region includes a sensing element, a first light shielding layer and a second light shielding layer. The sensing element is disposed corresponding to the sensing region. The first light shielding layer includes at least one first opening corresponding to the sensing element. The second light shielding layer includes at least one second opening overlapped with the first opening. In a cross-section view, a boundary between the sensing region and the non-sensing region is at an outer side of an edge of a portion of the first light shielding layer, and a horizontal distance between an edge of a portion of the second light shielding layer and the sensing element is greater than or equal to a vertical distance between the portion of the second light shielding layer and the sensing element in a top-view direction of the electronic device.

    LIGHT SENSOR
    5.
    发明公开
    LIGHT SENSOR 审中-公开

    公开(公告)号：US20240192053A1

    公开(公告)日：2024-06-13

    申请号：US18524960

    申请日：2023-11-30

    Applicant: STMicroelectronics (Grenoble 2) SAS ,  STMicroelectronics (Crolles 2) SAS

    Inventor： Cedric Tubert ,  Matteo Maria Vignetti

    IPC: G01J1/44

    CPC classification number: G01J1/44 ,  G01J2001/446

    Abstract: An embodiment light sensor includes an array of pixels arranged in rows and in columns. Each pixel comprises a photodiode, a sense node coupled to the photodiode, and an initialization transistor connected to the sense node. N successive pixels of a column or of a row are associated, where N is greater than or equal to 2. The initialization transistor of a first one of the pixels arranged at one end of the association of the N pixels is connected between the sense node of the first one of the pixels and a node of application of an initialization potential. For each two successive pixels among the N pixels, the initialization transistor of one of the pixels that is the most distant from the end is connected between the sense nodes of the two pixels.

    LIGHT DETECTION MODULE, LIGHT DETECTION METHOD AND DISPLAY DEVICE
    8.
    发明公开
    LIGHT DETECTION MODULE, LIGHT DETECTION METHOD AND DISPLAY DEVICE 审中-公开

    公开(公告)号：US20240125648A1

    公开(公告)日：2024-04-18

    申请号：US17927109

    申请日：2021-11-26

    Applicant: BOE TECHNOLOGY GROUP CO., LTD.

    Inventor： Xinshe YIN ,  Hui ZHAO ,  Xinbin HAN

    IPC: G01J1/46

    CPC classification number: G01J1/46 ,  G01J2001/446

    Abstract: A light detection module, a light detection method and a display device are provided. The light detection module includes N light sensing circuits, a control circuit, a capacitance integrating conversion circuit, and a processing circuit; N is a positive integer; wherein the N light sensing circuits respectively sense light signals of different colors to generate corresponding photocurrents; the control circuit is configured to control to provide photocurrents generated by the light sensing circuits to a capacitance integrating amplifying circuit in a time division manner, and to control a conversion parameter of the capacitance integrating amplifying circuit; the capacitance integrating conversion circuit is configured to perform integrating conversion on the photocurrent according to the conversion parameter and an integration time, to obtain an analog output voltage; the processing circuit is configured to obtain characteristics of the light signal according to the analog output voltage. In the present disclosure, the current integration method is adopted by the capacitance integration conversion circuit, and the photocurrent is converted according to the integration time, so that the number and area of the photodiodes connected in parallel in the light sensing circuit can be reduced by increasing the integration time, the space and cost are reduced.

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