Laser diode drive circuit and LiDAR
AssigneeSuteng Innovation Technology Co., Ltd.
InventorXiaojun Zhou
Life of this patent
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Abstract
Embodiments of this application disclose a laser diode drive circuit and a LiDAR. The laser diode drive circuit includes a laser diode and a charging and discharging circuit. A cathode of the laser diode is grounded. The charging and discharging circuit is in a one-to-one correspondence with the laser diode, and includes an energy storage element, a first switch element, and a second switch element. The energy storage element is connected to an anode of the laser diode via the first switch element, and the energy storage element is grounded via the first switch element and the second switch element in sequence.
Claims8
A laser diode drive circuit, comprising:
- a laser diode, wherein a cathode of the laser diode is grounded;
- and a charging and discharging circuit in a one-to-one correspondence with the laser diode, wherein the charging and discharging circuit comprises an energy storage element, a first switch element, and a second switch element, the energy storage element is connected to an anode of the laser diode via the first switch element, and the energy storage element is grounded via the first switch element and the second switch element in sequence,
- wherein when the energy storage element is charged, the first switch element is turned off and the second switch element is turned on, so that leakage current through the first switch element is discharged via the second switch element;
- and when the energy storage element is discharged, the first switch element is turned on and the second switch element is turned off, so that the energy released from the energy storage element drives the laser diode to emit laser through the first switch element;
- wherein the energy storage element comprises an energy storage capacitor, a first electrode plate of the energy storage capacitor is connected to the first switch element, and a second electrode plate of the energy storage capacitor is grounded;
- and
- wherein the first switch element and the second switch element each comprise an input terminal, an output terminal, and a control terminal, the input terminal of the first switch element is connected to the first electrode plate of the energy storage capacitor, the output terminal of the first switch element is connected to the anode of the laser diode and the input terminal of the second switch element, the output terminal of the second switch element is grounded, and control terminals of the first switch element and the second switch element are configured to be connected to an external controller or a built-in controller of the laser diode drive circuit.
Dependencies are inferred from the claim text.