Laser emitting circuit and lidar
AssigneeSuteng Innovation Technology Co., Ltd.
InventorsJunlin Chen, Wenbin Rui
Life of this patent
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Abstract
The present application discloses a laser emitting circuit and a LiDAR. In a one-driving-multiple emitting circuit, in an energy storage stage, a power supply stores energy for an energy storage element of the energy storage circuit, and a laser diode does not emit light. In an energy transfer stage, by setting a floating-ground diode D0, an energy charging current passes through an energy storage capacitor C2, the floating-ground diode D0 and the ground to form a loop. In an energy release stage, when the energy release switch element is in an off state, the energy release circuit where the energy release switch element is located is not the lowest impedance loop. A laser diode in the energy release circuit where the energy release switch element is located does not emit light.
Claims10
A laser emitting circuit, comprising an energy charging circuit, an energy transfer circuit and a plurality of energy release circuits, the plurality of energy release circuits connected in parallel, wherein
- the energy charging circuit is connected to the energy transfer circuit and is configured to store electric energy;
- the energy transfer circuit is connected to the energy charging circuit and the energy release circuits, and configured to transfer the electric energy stored in the energy charging circuit to the energy transfer circuit, and the energy transfer circuit comprises an energy storage capacitor and a floating-ground diode, wherein a first terminal of the energy storage capacitor is connected to the energy charging circuit, the first terminal of the energy storage capacitor is connected to the energy release circuits, a second terminal of the energy storage capacitor is grounded via the floating-ground diode, and the second terminal of the energy storage capacitor is connected to the energy release circuits;
- each energy release circuit is configured to drive a laser diode to emit light using the electric energy stored in the energy transfer circuit, the energy release circuit comprises an energy release switch element, the laser diode and a clamping diode, wherein a first switch terminal of the energy release switch element is connected to the first terminal of the energy storage capacitor, a second switch terminal of the energy release switch element is connected to a positive electrode of the clamping diode, the second switch terminal of the energy release switch element is connected to a positive electrode of the laser diode, a negative electrode of the clamping diode is grounded, and a negative electrode of the laser diode is connected to the second terminal of the energy storage capacitor.
Dependencies are inferred from the claim text.