CN109324332A - Laser transmission circuit and laser radar - Google Patents
Laser transmission circuit and laser radar Download PDFInfo
- Publication number
- CN109324332A CN109324332A CN201811191132.1A CN201811191132A CN109324332A CN 109324332 A CN109324332 A CN 109324332A CN 201811191132 A CN201811191132 A CN 201811191132A CN 109324332 A CN109324332 A CN 109324332A
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- laser
- module
- semiconductor
- oxide
- transmission circuit
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 59
- 238000007600 charging Methods 0.000 claims abstract description 9
- 239000004065 semiconductor Substances 0.000 claims description 68
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical group [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 21
- 229910002601 GaN Inorganic materials 0.000 claims description 17
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 8
- 230000017525 heat dissipation Effects 0.000 abstract description 10
- 230000003071 parasitic effect Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 8
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/484—Transmitters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/491—Details of non-pulse systems
- G01S7/4911—Transmitters
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- Semiconductor Lasers (AREA)
Abstract
This application involves laser transmission circuit and laser radar, a kind of laser transmission circuit includes: transmitting module, for emitting laser；Power module is electrically connected with the transmitting module, for energizing for the transmitting module；Control module is electrically connected with the transmitting module and the power module respectively, for controlling the power module charging and controlling the Laser emission of the transmitting module；Wherein, the control module is integrated circuit device.Above-mentioned laser transmission circuit, is energized and Laser emission by integrated circuit device control circuit, is optimized configuration, is reduced the volume of laser transmission circuit, is conducive to heat dissipation, and reduce the parasitic parameter of circuit board trace.
Description
Technical field
The present invention relates to semiconductor fields, more particularly to a kind of laser transmission circuit and laser radar.
Background technique
In laser radar, traditional laser transmitting system part is generally made of discrete circuit, and structure is complex, device
Part discreteness is big, so as to lead to problems such as higher cost, the volume of laser radar larger and be unfavorable for heat dissipation.
Summary of the invention
Based on this, it is necessary in view of the above technical problems, provide a kind of laser transmission circuit, structure is relatively simple, can be with
The volume of circuit is effectively reduced, there is better circuit parameter.
A kind of laser transmission circuit, comprising:
Transmitting module, for emitting laser；
Power module is electrically connected with the transmitting module, for energizing for the transmitting module；
Control module is electrically connected with the transmitting module and the power module respectively, for controlling the energy supply mould
Block charges and controls the Laser emission of the transmitting module；
Wherein, the control module is integrated circuit device.
Above-mentioned laser transmission circuit, is energized and Laser emission by integrated circuit device control circuit, optimizes route
Layout, reduces the volume of laser transmission circuit, is conducive to heat dissipation, and reduce the parasitic parameter of circuit board trace.
The control module includes: in one of the embodiments,
First metal-oxide-semiconductor is electrically connected with the power module, for controlling the power module charging；
First driver is electrically connected with first metal-oxide-semiconductor, for driving first metal-oxide-semiconductor.
First metal-oxide-semiconductor is gallium nitride metal-oxide-semiconductor in one of the embodiments,.
The control module in one of the embodiments, further include:
Second metal-oxide-semiconductor is electrically connected with the transmitting module, for controlling the transmitting of laser；
Second driver is electrically connected with second metal-oxide-semiconductor, for driving second metal-oxide-semiconductor.
Second metal-oxide-semiconductor is gallium nitride metal-oxide-semiconductor in one of the embodiments,.
The power module includes inductance and capacitor in one of the embodiments, the inductance and the control module
Electrical connection, one end ground connection of the capacitor, one end is electrically connected with the control module.
The transmitting module includes laser diode in one of the embodiments, the laser diode anode with
The power module electrical connection, the cathode of the laser diode are electrically connected with the control module.
In one embodiment, the laser transmission circuit further include:
Protective module is connected between the power module and the transmitting module.
The protective module includes zener diode in one of the embodiments, and the anode of the zener diode connects
Ground, the cathode of the zener diode are connected between the power module and the transmitting module.
A kind of laser radar apparatus, including above-mentioned laser transmission circuit.
Above-mentioned laser radar apparatus, is energized and Laser emission by integrated circuit device control circuit, optimizes route
Layout, reduces the volume of laser transmission circuit, is conducive to heat dissipation, and reduce the parasitic parameter of circuit board trace.
Detailed description of the invention
Fig. 1 is the module diagram of laser transmission circuit in one embodiment；
Fig. 2 is the structural schematic diagram of control module in one embodiment；
Fig. 3 is the module diagram of laser transmission circuit in another embodiment；
Fig. 4 is the structural schematic diagram of laser transmission circuit in another embodiment.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and
It is not used in restriction the application.
Fig. 1 is the module diagram of laser transmission circuit in one embodiment, as shown in Figure 1, in one embodiment, one
Kind laser transmission circuit 100, comprising: transmitting module 120, for emitting laser；Power module 140 is electrically connected with transmitting module 120
It connects, for being energized for transmitting module 120；Control module 160 is electrically connected with transmitting module 120 and power module 140 respectively,
For controlling the Laser emission of the charging of power module 140 and control transmitting module 120；Wherein, control module 160 is integrated electricity
Road device.
Specifically, in laser transmission circuit 100, laser signal, transmitting module 120 1 are emitted by transmitting module 120
As can be the lasers such as laser diode.The energy that transmitting module 120 emits laser signal is provided by power module 140, is supplied
Energy module 140 can be booster circuit, provide energy after charging for transmitting module 120.Control module 160 is an integrated circuit device
Part, such as can be an integrated chip, 160 kinds of control module may include energy supply control unit and emission controlling unit two
Point, wherein energy supply control unit is electrically connected with power module 140, can be the charging of power module 140 by pulse control, from
And energy is provided for Laser emission.Emission controlling unit is electrically connected with transmitting module 120, is swashed to realize to transmitting module 120
Photoemissive control.
Further, the control unit diversity of the control section of the laser power supply in laser transmission circuit 100 and Laser emission
At into this device of control module 160, the layout of laser transmission circuit is optimized, so that the volume of laser transmission circuit obtains
Discreteness to reduction, device is smaller, reduces the parasitic parameter of circuit trace.And optimal control module can also be passed through
The selection of element in 160, reduces the overall power of laser transmission circuit, so that the heat dissipation of laser transmission circuit is also changed
It is kind.
Above-mentioned laser transmission circuit 100, is energized and Laser emission by integrated circuit device control circuit, optimizes line
Road layout, reduces the volume of laser transmission circuit, is conducive to heat dissipation, and reduce the parasitic parameter of circuit board trace.
Fig. 2 is the structural schematic diagram of control module 160 in one embodiment, as shown in Fig. 2, in one embodiment,
In one embodiment, control module 160 includes: the first metal-oxide-semiconductor Q1, is electrically connected with power module 140, for controlling power module
140 chargings；First driver U1 is electrically connected with the first metal-oxide-semiconductor Q1, for driving the first metal-oxide-semiconductor Q1.
Specifically, in control module 160, energy supply control unit may include the first metal-oxide-semiconductor Q1 and the first driver
U1, wherein the input terminal of the first driver U1 is connect with the external world, can control signal for receiving to fill, the first driver U1's is defeated
Outlet is electrically connected with the grid of the first metal-oxide-semiconductor Q1, thus driving the first metal-oxide-semiconductor Q1 work.The source electrode of first metal-oxide-semiconductor Q1 is grounded,
The drain electrode of first metal-oxide-semiconductor Q1 is electrically connected with power module 140, and it is in power module that the first driver U1, which drives the first metal-oxide-semiconductor Q1,
140 inductance and capacitor charging.It is understood that the type and model of the first metal-oxide-semiconductor Q1 and the first driver U1 can roots
Factually the demand of border laser transmission circuit determines.
In a preferred embodiment, above-mentioned first metal-oxide-semiconductor Q1 is gallium nitride (GaN) metal-oxide-semiconductor, and the first driver is nitrogen
Change gallium metal-oxide-semiconductor driver.By using gallium nitride (GaN) metal-oxide-semiconductor and driver, the effect for power module charging can be improved
Rate further decreases the power consumption of laser transmission circuit, improves the heat dissipation of laser transmission circuit.
In one embodiment, control module 160 further include: the second metal-oxide-semiconductor Q2 is electrically connected with transmitting module 120, is used for
Control the transmitting of laser；Second driver U2 is electrically connected with the second metal-oxide-semiconductor Q2, for driving the second metal-oxide-semiconductor Q2.
Specifically, in control module 160, emission controlling unit may include the second metal-oxide-semiconductor Q2 and the second driver
U2, wherein the input terminal of the second driver U2 is connect with the external world, and for receiving emissioning controling signal, the second driver U2's is defeated
Outlet is electrically connected with the grid of the second metal-oxide-semiconductor Q2, thus driving the second metal-oxide-semiconductor Q2 work, the source electrode ground connection of the second metal-oxide-semiconductor Q2,
The drain electrode of second metal-oxide-semiconductor Q2 is electrically connected with transmitting module 120, controls the Laser emission of transmitter in transmitting module 120.It can manage
Solution, the type and model of the second metal-oxide-semiconductor Q2 and the second driver U2 can be true according to the demand of practical laser transmit circuit
It is fixed.
In a preferred embodiment, above-mentioned second metal-oxide-semiconductor Q2 is gallium nitride (GaN) metal-oxide-semiconductor, and the second driver is nitrogen
Change gallium metal-oxide-semiconductor driver.Transmitting module 120 is controlled by using gallium nitride (GaN) metal-oxide-semiconductor, also can reduce Laser emission electricity
The power consumption on road improves the heat dissipation of laser transmission circuit.
In one embodiment, power module 140 includes inductance and capacitor, and inductance is electrically connected with control module 160, capacitor
One end ground connection, one end is electrically connected with control module 160.
Specifically, in laser transmission circuit 100, power module 140 may include inductance and capacitor, and inductance and capacitor can
To be electrically connected respectively with the first metal-oxide-semiconductor in control module 160, in the inductance, capacitor and control module in power module 140
The first metal-oxide-semiconductor, the first driver collectively constitute booster circuit, it is that inductance capacitance charges that the first driver, which drives the first metal-oxide-semiconductor,
Think the transmitter energy supply in transmitting module 120.Wherein, the model and quantity of capacitor and inductance can roots in power module 140
It is determined according to the actual demand of laser transmission circuit.
In one embodiment, transmitting module 120 includes laser diode, the anode and power module of laser diode
140 electrical connections, the cathode of laser diode are electrically connected with control module 160.
Specifically, the transmitter in transmitting module 120 can be laser diode, anode and the energy supply mould of laser diode
Block 140 is electrically connected, and receives the electric energy of power module 140, and the cathode of laser diode is electrically connected with control module 160, is controlling
Laser emission is carried out under the control of module.Laser diode has small in size, the high-efficient and service life long compared to other lasers
The advantages that, it can reduce the volume and power consumption of laser transmission circuit, being conducive to the heat dissipation for improving laser transmission circuit and reduction makes
Use cost.
Fig. 3 is the module diagram of laser transmission circuit in another embodiment, as shown in figure 3, in the above-described embodiments
In the structure basis of laser transmission circuit, laser transmission circuit 200 includes transmitting module 220, power module 240 and control mould
Block 260, respectively can be identical as the corresponding construction in above implement.In addition, laser transmission circuit 200 further include: protection mould
Block 280 is connected between power module 240 and transmitting module 220.
Specifically, in laser transmission circuit 200, other than above-mentioned module, protective module 280 can also be set, visited
For the setting of measurement equipment 220 between power module 240 and transmitting module 220, protective module 280 can play the circuits such as pressure stabilizing guarantor
Shield effect, prevents power module 240 from damaging to transmitting module 220.The type and model of protective module 280 can be according to realities
Border demand determines that in a preferred embodiment, above-mentioned protective module 280 may include zener diode, zener diode
Plus earth, the cathode of zener diode is connected between power module 240 and transmitting module 220.
Fig. 4 is the concrete structure schematic diagram of laser transmission circuit in one embodiment, as shown in figure 4, in one embodiment
In, laser transmission circuit includes power module, control module 260, transmitting module and protective module.Wherein, power module packet
Include inductance L1, diode D1 and capacitor C1.Control module 260 includes gallium nitride metal-oxide-semiconductor Q1, the first driver U1, gallium nitride
Metal-oxide-semiconductor Q2 and the second driver U2, control module 260 are an IC chip.Transmitting module is laser diode LD, is protected
Shield module is zener diode D2.
Specifically, control module 260 is an IC chip, wherein gallium nitride metal-oxide-semiconductor Q1 and the first driver U1 are
Control circuit is energized, the input terminal of the first driver U1 is connect with the external world, can control signal for receiving to fill, the first driver U1
Output end be electrically connected with the grid of gallium nitride metal-oxide-semiconductor Q1, the source electrode of gallium nitride metal-oxide-semiconductor Q1 ground connection, the leakage of gallium nitride metal-oxide-semiconductor Q1
Pole is electrically connected with the inductance L1 in power module, and the drain electrode of gallium nitride metal-oxide-semiconductor Q1 also passes through diode D1 and is electrically connected with capacitor C1.
First driver U1, gallium nitride metal-oxide-semiconductor Q1, inductance L1, diode D1 and capacitor C1 collectively form boost chopper (boost) electricity
Road, it is that inductance L1 and capacitor C1 charges that the first driver U1, which drives gallium nitride metal-oxide-semiconductor Q1, and capacitor C1 and laser diode LD are just
Pole electrical connection, to provide energy for laser diode LD.The collection of zener diode D2 is grounded, and cathode is connected to more than capacitor C1
Between laser diode, the circuit protective effect from power module is during laser diode energizes.
Gallium nitride metal-oxide-semiconductor Q2 and the second driver U2 is countdown circuit, and the second driver U2 is gallium nitride metal-oxide-semiconductor Q2
Special purpose driver, the input terminal of the second driver U2 receives emissioning controling signal, the output end of the second driver U2 and nitridation
The grid of gallium metal-oxide-semiconductor Q2 is electrically connected, and the source electrode ground connection of the second metal-oxide-semiconductor Q2, drain electrode is electrically connected with the cathode of laser diode LD, the
Two driver U2 drive gallium nitride metal-oxide-semiconductor Q2 to control the Laser emission of laser diode LD.
By by the metal-oxide-semiconductor of the energy supply control section in laser transmission circuit and driver and emission control part
Metal-oxide-semiconductor and driver U2 are integrated in same chip, are reduced the volume of laser transmission circuit and the discreteness of device, are reduced
The parasitic parameter of circuit trace, and efficiency is improved by using gallium nitride metal-oxide-semiconductor and laser diode, reduce Laser emission
The heat dissipation of the power consumption of circuit, so that laser transmission circuit has obtained better performance.
In one embodiment, a kind of laser radar apparatus, including above-mentioned laser transmission circuit.
Specifically, above-mentioned laser transmission circuit can be applied in laser radar, in addition to laser is sent out in laser radar apparatus
It can also include power supply, processing equipment, optics receiving device, rotating base, shell and human-computer interaction device etc. outside transmit-receive radio road
Specific structure.It include above-mentioned Laser emission electricity all the way it is understood that laser radar apparatus can be single laser radar
Road, laser radar apparatus may be multi-path laser radar, including the above-mentioned laser transmission circuit of multichannel and corresponding control system
System, wherein the particular number of multichannel can determine according to actual needs.
Above-mentioned laser radar apparatus, by by the circuit energized part and laser emission section of laser transmission circuit in radar
Divide and be integrated in same device, reduces the volume of laser transmission circuit, be conducive to radiate, and optimize configuration, subtract
The small parasitic parameter of circuit board trace.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of laser transmission circuit characterized by comprising
Transmitting module, for emitting laser；
Power module is electrically connected with the transmitting module, for energizing for the transmitting module；
Control module is electrically connected with the transmitting module and the power module respectively, is filled for controlling the power module
The Laser emission of electricity and the control transmitting module；
Wherein, the control module is integrated circuit device.
2. laser transmission circuit according to claim 1, which is characterized in that the control module includes:
First metal-oxide-semiconductor is electrically connected with the power module, for controlling the power module charging；
First driver is electrically connected with first metal-oxide-semiconductor, for driving first metal-oxide-semiconductor.
3. laser transmission circuit according to claim 2, which is characterized in that first metal-oxide-semiconductor is gallium nitride metal-oxide-semiconductor.
4. laser transmission circuit according to claim 1, which is characterized in that the control module further include:
Second metal-oxide-semiconductor is electrically connected with the transmitting module, for controlling the transmitting of laser；
Second driver is electrically connected with second metal-oxide-semiconductor, for driving second metal-oxide-semiconductor.
5. laser transmission circuit according to claim 4, which is characterized in that second metal-oxide-semiconductor is gallium nitride metal-oxide-semiconductor.
6. laser transmission circuit according to claim 1, which is characterized in that the power module includes inductance and electricity
Hold, the inductance is electrically connected with the power module, and one end ground connection of the capacitor, one end is electrically connected with the control module.
7. laser transmission circuit according to claim 1, which is characterized in that the transmitting module includes laser diode,
The anode of the laser diode is electrically connected with the power module, the cathode of the laser diode and control module electricity
Connection.
8. laser transmission circuit according to claim 1, which is characterized in that further include:
Protective module is connected between the power module and the transmitting module.
9. laser transmission circuit according to claim 8, which is characterized in that the protective module includes zener diode,
The plus earth of the zener diode, the cathode of the zener diode are connected to the power module and the transmitting module
Between.
10. a kind of laser radar apparatus, which is characterized in that including the electricity of Laser emission described in any one of claim 1 to 9
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811191132.1A CN109324332A (en) | 2018-10-12 | 2018-10-12 | Laser transmission circuit and laser radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811191132.1A CN109324332A (en) | 2018-10-12 | 2018-10-12 | Laser transmission circuit and laser radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109324332A true CN109324332A (en) | 2019-02-12 |
Family
ID=65261715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811191132.1A Pending CN109324332A (en) | 2018-10-12 | 2018-10-12 | Laser transmission circuit and laser radar |
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| Country | Link |
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| CN (1) | CN109324332A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113109788A (en) * | 2020-01-13 | 2021-07-13 | 华为技术有限公司 | Pulse emission control circuit and control method |
| WO2022135087A1 (en) * | 2020-12-21 | 2022-06-30 | 华为技术有限公司 | Laser transmission module, laser radar, and mobile platform |
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| CN107436431A (en) * | 2017-07-17 | 2017-12-05 | 南京理工大学 | A kind of pulse laser emission circuit |
| CN108445506A (en) * | 2018-05-11 | 2018-08-24 | 北醒（北京）光子科技有限公司 | A kind of driving radiating circuit, laser radar and measurement method |
| CN209327575U (en) * | 2018-10-12 | 2019-08-30 | 深圳市速腾聚创科技有限公司 | Laser transmission circuit and laser radar |
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2018
- 2018-10-12 CN CN201811191132.1A patent/CN109324332A/en active Pending
Patent Citations (4)
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| CN104714220A (en) * | 2013-12-11 | 2015-06-17 | 重庆爱特光电有限公司 | Laser emitting circuit, laser receiving circuit, distance calculating circuit and equipment thereof |
| CN107436431A (en) * | 2017-07-17 | 2017-12-05 | 南京理工大学 | A kind of pulse laser emission circuit |
| CN108445506A (en) * | 2018-05-11 | 2018-08-24 | 北醒（北京）光子科技有限公司 | A kind of driving radiating circuit, laser radar and measurement method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113109788A (en) * | 2020-01-13 | 2021-07-13 | 华为技术有限公司 | Pulse emission control circuit and control method |
| WO2021143601A1 (en) * | 2020-01-13 | 2021-07-22 | 华为技术有限公司 | Pulse emission control circuit and control method |
| WO2022135087A1 (en) * | 2020-12-21 | 2022-06-30 | 华为技术有限公司 | Laser transmission module, laser radar, and mobile platform |
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