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CN-121995397-A - Laser driving device and electronic product

CN121995397ACN 121995397 ACN121995397 ACN 121995397ACN-121995397-A

Abstract

The application relates to a laser driving device and an electronic product, wherein a first input end of a first laser driving component is connected with a first trigger signal, a second input end of the first laser driving component is connected with a second trigger signal, the first laser driving component generates a first narrow pulse signal to control a first laser emitting component to generate laser, the first input end of the second laser driving component is connected with the second trigger signal, a second input end of the second laser driving component is connected with the first trigger signal, the second laser driving component generates a second narrow pulse signal to control the second laser emitting component to generate laser, and the phases of the first trigger signal and the second trigger signal are different. The trigger signals of the two laser driving assemblies are the same, and the first narrow pulse signal and the second narrow pulse signal are generated according to different phases of the first trigger signal and the second trigger signal, so that the consistency of the two narrow pulse signals in pulse width and delay time is improved, and the lasers generated by the two laser emitting assemblies are more continuous.

Inventors

  • YU YONGTAO
  • BAO XIAOTING
  • YU XUJIAN

Assignees

  • 宁波舜宇车载光学技术有限公司

Dates

Publication Date
20260508
Application Date
20241101

Claims (10)

  1. 1. The laser driving device is characterized by comprising a laser driving module, wherein the laser driving module comprises a first laser driving assembly and a second laser driving assembly; The first input end of the first laser driving component is connected with a first trigger signal, the second input end of the first laser driving component is connected with a second trigger signal, and the output end of the first laser driving component is connected to the first laser emission component and is used for generating a first narrow pulse signal according to the first trigger signal and the second trigger signal and transmitting the first narrow pulse signal to the first laser emission component so that the first laser emission component generates laser; The first input end of the second laser driving component is connected with the second trigger signal, the second input end of the second laser driving component is connected with the first trigger signal, the output end of the second laser driving component is connected to the second laser emitting component and is used for generating a second narrow pulse signal according to the second trigger signal and the first trigger signal and transmitting the second narrow pulse signal to the second laser emitting component so that the second laser emitting component generates laser; a phase difference exists between the first trigger signal and the second trigger signal.
  2. 2. The laser driving device according to claim 1, wherein, The first laser driving component is used for generating the first narrow pulse signal according to rising edges of the first trigger signal and the second trigger signal; the second laser driving component is used for generating the second narrow pulse signal according to the first trigger signal and the falling edge of the second trigger signal.
  3. 3. The laser driving device according to claim 1, wherein, The first laser driving component is used for outputting the first narrow pulse signal if the first trigger signal is in a high level and the second trigger signal is in a low level; the second laser driving component is used for outputting the second narrow pulse signal if the second trigger signal is at a high level and the first trigger signal is at a low level.
  4. 4. The laser driving device of claim 1, wherein the laser driving module further comprises a first high-speed switch and a second high-speed switch; The output end of the first laser driving assembly is connected to the first laser emission assembly through the first high-speed switch; the output end of the second laser driving component is connected to the second laser emitting component through the second high-speed switch.
  5. 5. The laser driving device according to claim 1, wherein, The first laser driving component and the second laser driving component are both narrow pulse generators; The first input end of the first laser driving component is the positive electrode input end of the narrow pulse generator, and the second input end of the first laser driving component is the negative electrode input end of the narrow pulse generator; The first input end of the second laser driving component is the positive electrode input end of the narrow pulse generator, and the second input end of the second laser driving component is the negative electrode input end of the narrow pulse generator.
  6. 6. The laser driving device of claim 1, further comprising a trigger signal generating component; The trigger signal generating component is respectively connected with the first input end of the first laser driving component, the second input end of the first laser driving component, the first input end of the second laser driving component and the second input end of the second laser driving component, and is used for generating a first trigger signal and a second trigger signal, and outputting the first trigger signal to the first input end of the first laser driving component and the second input end of the second laser driving component respectively, and outputting the second trigger signal to the second input end of the first laser driving component and the first input end of the second laser driving component respectively.
  7. 7. The laser driving device as claimed in claim 6, wherein the trigger signal generating assembly comprises a trigger signal element and a phase shift element; The trigger signal element is respectively connected with the first input end of the first laser driving assembly, the second input end of the second laser driving assembly and the phase shift element, and is used for generating the first trigger signal and respectively outputting the first trigger signal to the first input end of the first laser driving assembly, the second input end of the second laser driving assembly and the phase shift element; The phase shift element is respectively connected with the second input end of the first laser driving component and the first input end of the second laser driving component, and is used for receiving the first trigger signal, generating the second trigger signal after performing phase shift processing on the first trigger signal, and outputting the second trigger signal to the second input end of the first laser driving component and the first input end of the second laser driving component.
  8. 8. The laser driving device according to claim 7, wherein the phase shift element includes a first delay circuit, a second delay circuit, and a shaping circuit; the first delay circuit is respectively connected with the trigger signal element and the first input end of the shaping circuit and is used for receiving the first trigger signal and carrying out delay processing on the first trigger signal to obtain a first delay signal; The second delay circuit is respectively connected with the trigger signal element and the second input end of the shaping circuit and is used for receiving the first trigger signal and carrying out delay processing on the first trigger signal to obtain a second delay signal; The output end of the shaping circuit is respectively connected with the second input end of the first laser driving assembly and the first input end of the second laser driving assembly, and is used for shaping the first delay signal and the second delay signal to obtain the second trigger signal.
  9. 9. The laser driving device as claimed in claim 8, wherein, The shaping circuit is an AND gate shaping circuit and is used for outputting the high level of the second trigger signal if the rising edge voltage of the first delay signal and the rising edge voltage of the second delay signal are both larger than an AND gate rising edge threshold value, and outputting the low level of the second trigger signal if any one of the falling edge voltage of the first delay signal and the falling edge voltage of the second delay signal is smaller than an AND gate falling edge threshold value.
  10. 10. An electronic product comprising the laser driving device according to any one of claims 1 to 9 and a laser emitting assembly; the laser driving device is connected with the laser emitting assembly and used for driving the laser emitting assembly to generate laser.

Description

Laser driving device and electronic product Technical Field The application relates to the technical field of laser radars, in particular to a laser driving device and an electronic product. Background The lidar is a radar system that detects a characteristic quantity such as a position, a speed, etc. of a target by emitting a laser beam. The working principle is that a laser beam is emitted to a target to be detected, and then the laser beam reflected by the target to be detected is received, so that radar data is generated, and information such as position and speed of the target to be detected is determined. In practical use of the lidar, the laser generator needs to release a large amount of energy in a short time to generate high-intensity laser pulses, and if the single laser generator is continuously operated, its power consumption is very high, and it may cause problems of overheating or damage. Therefore, the lidar is usually provided with at least two laser generators, and the light is emitted by the at least two laser generators in turn, so that the above problem is avoided. In the related art, two laser generators of the laser radar trigger two driving circuits respectively through two independent trigger signals to generate narrow pulse signals of the two laser generators, but the two independent trigger signals have no association relationship, so that the narrow pulse signals of the two correspondingly generated laser generators have inconsistent pulse width and delay time, and further the laser generated by the two laser generators is discontinuous. Disclosure of Invention Accordingly, it is desirable to provide a laser driving device and an electronic product, which address the above-mentioned problems. The application provides a laser driving device which comprises a laser driving module, wherein the laser driving module comprises a first laser driving component and a second laser driving component, a first input end of the first laser driving component is connected with a first trigger signal, a second input end of the first laser driving component is connected with a second trigger signal, an output end of the first laser driving component is connected to the first laser emitting component and used for generating a first narrow pulse signal according to the first trigger signal and the second trigger signal and transmitting the first narrow pulse signal to the first laser emitting component so that the first laser emitting component generates laser, a first input end of the second laser driving component is connected with the second trigger signal, a second input end of the second laser driving component is connected with the first trigger signal, an output end of the second laser driving component is connected to the second laser emitting component and used for generating a second narrow pulse signal according to the second trigger signal and the first trigger signal and transmitting the second narrow pulse signal to the second laser emitting component so that a phase difference exists between the second laser emitting component and the second laser emitting component. In one embodiment, the first laser driving component is configured to generate the first narrow pulse signal according to rising edges of the first trigger signal and the second trigger signal, and the second laser driving component is configured to generate the second narrow pulse signal according to falling edges of the first trigger signal and the second trigger signal. In one embodiment, the first laser driving component is configured to output the first narrow pulse signal if the first trigger signal is at a high level and the second trigger signal is at a low level, and the second laser driving component is configured to output the second narrow pulse signal if the second trigger signal is at a high level and the first trigger signal is at a low level. In one embodiment, the laser driving module further comprises a first high-speed switch and a second high-speed switch, wherein the output end of the first laser driving component is connected to the first laser emitting component through the first high-speed switch, and the output end of the second laser driving component is connected to the second laser emitting component through the second high-speed switch. In one embodiment, the first laser driving component and the second laser driving component are both narrow pulse generators, the first input end of the first laser driving component is the positive electrode input end of the narrow pulse generator, the second input end of the first laser driving component is the negative electrode input end of the narrow pulse generator, the first input end of the second laser driving component is the positive electrode input end of the narrow pulse generator, and the second input end of the second laser driving component is the negative electrode input end of the narrow pulse generator. In one embodiment, the laser driving de