Detection circuit, device and method for detecting light source flicker, and photoelectric detection device

    公开(公告)号:US11910100B2

    公开(公告)日:2024-02-20

    申请号:US17384931

    申请日:2021-07-26

    CPC classification number: H04N23/745 G01J1/44 G01J2001/444

    Abstract: A detection circuit, a method for detecting light source flicker, a device for detecting light source flicker, and a photoelectric detection device are provided by the examples of the present disclosure, and the detection circuit includes a power supply; a photodiode configured to output a current based on a light source; a driving circuit connected in series with the photodiode and configured to generate an output voltage based on the current output by the photodiode, a current output by the power supply, and a resistive component, the driving circuit includes a plurality of circuits with different illumination correlation coefficients; and a control unit connected with the driving circuit and configured to select a circuit with a matched illumination correlation coefficient from the driving circuit to control the output voltage within a designate voltage range.

    High-energy suppression for infrared imagers or other imaging devices

    公开(公告)号:US11894670B2

    公开(公告)日:2024-02-06

    申请号:US17480554

    申请日:2021-09-21

    CPC classification number: H02H3/20 G01J1/44 G01J2001/0276

    Abstract: An apparatus includes a photodetector configured to generate an electrical current based on received illumination. The apparatus also includes an integration capacitor configured to integrate the electrical current and generate an integrator voltage. The apparatus further includes an amplifier configured to control a transistor switch coupled in series between the photodetector and the integration capacitor. The apparatus also includes an event detector configured to sense a high-energy event affecting the photodetector. In addition, the apparatus includes a switchable clamp coupled across inputs of the amplifier, where the event detector is configured to close the switchable clamp in response to sensing the high-energy event.

    LIGHT RECEIVER CIRCUIT AND LIGHT SENSOR ARRAY COMPRISING A LIGHT RECEIVER CIRCUIT

    公开(公告)号:US20240035884A1

    公开(公告)日:2024-02-01

    申请号:US18226422

    申请日:2023-07-26

    CPC classification number: G01J1/44 G01S7/497 G01J2001/444 G01J2001/4466

    Abstract: A light receiver circuit with compensation of propagation times has at least one light sensor, one control circuit, one connecting line to a TDC circuit, and a test circuit. The test line is connected to a test signal source. The test circuit connects the test line to the control circuit and forwards the test signal to the control circuit. The control circuit routes a measurement signal of the light sensor to the TDC circuit and a test signal to the connecting line and to the TDC circuit to evaluate the test signal and propagation time of test signal from test circuit to TDC circuit. The light sensor array further includes a plurality of light receiver circuits of such kind. The invention also relates to a Lidar receiver for capturing optical events with a light sensor array with a TDC circuit and a test signal source and with a timecode generator.

    Wireless battery-powered daylight sensor

    公开(公告)号:US11885672B2

    公开(公告)日:2024-01-30

    申请号:US17589098

    申请日:2022-01-31

    Abstract: A wireless battery-powered daylight sensor for measuring a total light intensity in a space is operable to transmit wireless signals using a variable transmission rate that is dependent upon the total light intensity in the space. The sensor comprises a photosensitive circuit, a wireless transmitter for transmitting the wireless signals, a controller coupled to the photosensitive circuit and the wireless transmitter, and a battery for powering the photosensitive circuit, the wireless transmitter, and the controller. The photosensitive circuit is operable to generate a light intensity control signal in response to the total light intensity in the space. The controller transmits the wireless signals in response to the light intensity control signal using the variable transmission rate that is dependent upon the total light intensity in the space. The variable transmission rate may be dependent upon an amount of change of the total light intensity in the space. In addition, the variable transmission rate may be further dependent upon a rate of change of the total light intensity in the space.

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