CN109661076B - Lamp lighting control circuit and vehicle - Google Patents
Lamp lighting control circuit and vehicle Download PDFInfo
- Publication number
- CN109661076B CN109661076B CN201910188512.8A CN201910188512A CN109661076B CN 109661076 B CN109661076 B CN 109661076B CN 201910188512 A CN201910188512 A CN 201910188512A CN 109661076 B CN109661076 B CN 109661076B
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- led
- circuit
- light
- car light
- control circuit
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
- H05B45/54—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits in a series array of LEDs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
Landscapes
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention provides a kind of lamp lighting control circuit and vehicles, lamp lighting control circuit includes multiple car light circuits and control circuit, each car light circuit includes at least one LED light, LED failure detection unit and LED drive unit, LED failure detection unit generates detection signal according to the malfunction of each LED light in the car light circuit of place, LED failure detection unit includes the failure detection result output end to export detection signal, LED drive unit includes the driving signal input to input LED drive signal, control circuit includes control chip, the input pin of control chip is connected with the failure detection result output end in each car light circuit, the output pin of control chip is connected with the driving signal input in each car light circuit, it controls chip and corresponding LED drive is generated according to detection signal Dynamic signal, to drive the LED light in each car light circuit to shine or extinguish.The present invention can be realized car light N-1 function, and circuit structure is simple, and circuit cost is lower, reliability and stability are higher.
Description
Technical field
The present invention relates to technical field of automotive electronics, and in particular to a kind of lamp lighting control circuit and a kind of vehicle.
Background technique
LED lamp is already widely used in automobile industry.The traffic safety of automobile is put in the first place.It is clearly advised in ECE regulation
Fixed, LED car lamp, if being also able to satisfy the light distribution requirements of corresponding function, can continue to make in the case where single LED extinguishing occurs
With；If not being able to satisfy light distribution requirements, lamps and lanterns is needed to feed back to vehicle body main control unit fault message, prompts user in time more
Auto parts are changed to guarantee safe driving.And due to LED every in lamps and lanterns position difference, it is difficult to ensure that any one LED
Whole lamp light distribution can meet ECE laws and regulations requirement after failure.
Therefore many vehicle factors require that LED car lamp realizes car light N-1 function at present, i.e., any one LED failure is owned
LED does not work.However at present to realize that circuit used by car light N-1 function and control logic are complex, higher cost,
Reliability is lower, also, analog circuit stability under extreme-temperature environment and limiting voltage is also relatively low.
Summary of the invention
The present invention is to solve to realize that the circuit of car light N-1 function use and the more complicated technology of control logic are asked at present
Topic provides a kind of lamp lighting control circuit and vehicle.
The technical solution adopted by the invention is as follows:
A kind of lamp lighting control circuit, including multiple car light circuits and control circuit, each car light circuit include at least
One LED light, LED failure detection unit and LED drive unit, the LED failure detection unit is according in the car light circuit of place
The malfunction of each LED light generates detection signal, and the LED failure detection unit includes to export the detection signal
Failure detection result output end, the LED drive unit include the driving signal input to input LED drive signal, institute
Stating control circuit includes control chip, the input pin and the fault detection knot in each car light circuit of the control chip
Fruit output end is connected, and the output pin of the control chip is connected with the driving signal input in each car light circuit,
The control chip generates the corresponding LED drive signal according to the detection signal, to drive each car light circuit
In LED light shine or extinguish.
Each car light circuit includes the LED branch that one or more LED light being connected in series are constituted, the LED branch
One end be connected to vehicle light power supply.
The LED drive unit includes the first triode and the first NMOS tube, the collector of first triode and institute
The other end for stating LED branch is connected, and the grid of first NMOS tube is connected with one end of first resistor, the first resistor
As the driving signal input, the source electrode of first NMOS tube is grounded the other end, the source electrode of first NMOS tube with
Second resistance is connected between grid, the drain electrode of first NMOS tube is connected to first triode by 3rd resistor
Emitter.
The LED failure detection unit includes the second NMOS tube and first diode, and the grid of second NMOS tube is logical
The other end that the 4th resistance is connected to the LED branch is crossed, the source electrode of second NMOS tube is grounded, second NMOS tube
Drain electrode is connected to the vehicle light power supply, the drain electrode of the anode of the first diode and second NMOS tube by the 5th resistance
It is connected, the cathode of the first diode is as the failure detection result output end.
The input pin of the control chip is connected to the failure detection result output end by the 6th resistance, and passes through
7th resistance eutral grounding.
Each car light circuit further includes the corresponding one or more protection capacitors in parallel with each LED light.
The control chip also obtains the voltage of the vehicle light power supply, and is generated and corresponded to according to the voltage of the vehicle light power supply
The LED drive signal, to drive LED light in each car light circuit to shine or extinguish.
A kind of vehicle, including above-mentioned lamp lighting control circuit.
Beneficial effects of the present invention:
The present invention carries out LED light fault detection by the LED failure detection unit in multiple car light circuits, passes through control electricity
Control chip in road generates corresponding LED drive signal according to detection signal, and passes through the LED driving in multiple car light circuits
Unit drives the LED light in each car light circuit to shine or extinguish, and vehicle can be realized by relatively simple circuit structure as a result,
Lamp N-1 function controls all LED light in any one LED light failure and extinguishes, so as to effectively user be reminded to replace in time
Part, guarantee driving safety, since circuit structure is simple, thus circuit cost is lower, reliability and stability are higher.
Detailed description of the invention
Fig. 1 is the block diagram of the lamp lighting control circuit of the embodiment of the present invention；
Fig. 2 is the circuit diagram of the car light circuit of one embodiment of the invention；
Fig. 3 is the circuit diagram of the control circuit of one embodiment of the invention；
Fig. 4 is the software flow pattern that the car light of one embodiment of the invention controls.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the lamp lighting control circuit of the embodiment of the present invention includes multiple car light circuits 10 and control circuit 20.Its
In, each car light circuit 10 includes at least one LED light 11, LED failure detection unit 12 and LED drive unit 13, LED failure
Detection unit 12 generates detection signal, LED failure detection unit 12 according to the malfunction of each LED light in the car light circuit of place
Including the failure detection result output end to export detection signal, LED drive unit 13 includes to input LED drive signal
Driving signal input；Control circuit 20 includes control chip, is controlled in the input pin and each car light circuit 10 of chip
Failure detection result output end be connected, control chip output pin and each car light circuit 10 in driving signal input
It is connected, control chip generates corresponding LED drive signal according to detection signal, to drive the LED light in each car light circuit 10
It shines or extinguishes.
In one embodiment of the invention, as shown in Fig. 2, each car light circuit 10 includes one or more is connected in series
The LED branch (in figure by taking 3 LED light LED1, LED2 and LED3 as an example) that LED light is constituted, one end of LED branch is connected to car light
Power supply VCC.LED drive unit 13 include the first triode Q1 and the first NMOS tube MOS1, the collector of the first triode Q1 with
The other end of LED branch is connected, and the grid of the first NMOS tube MOS1 is connected with one end of first resistor R1, and first resistor R1's is another
One end is grounded as driving signal input D-T4, the source electrode of the first NMOS tube MOS1, the source electrode and grid of the first NMOS tube MOS1
Second resistance R2 is connected between pole, the drain electrode of the first NMOS tube MOS1 is connected to the first triode Q1's by 3rd resistor R3
Emitter.LED failure detection unit 12 includes the second NMOS tube MOS2 and first diode D1, the grid of the second NMOS tube MOS2
The other end of LED branch is connected to by the 4th resistance R4, the source electrode of the second NMOS tube MOS2 is grounded, the second NMOS tube MOS2's
Drain electrode is connected to vehicle light power supply VCC, the drain electrode of the anode of first diode D1 and the second NMOS tube MOS2 by the 5th resistance R5
It is connected, the cathode of first diode D1 is as failure detection result output end N-1.In addition, as shown in Fig. 2, each car light circuit
10 further include the corresponding one or more in parallel with each LED light protect capacitors (in figure with 3 respectively with LED1, LED2 and
For C1, C2 and C3 of LED3 parallel connection).
In one embodiment of the invention, the model for controlling chip can be KEA8.As shown in figure 3, control chip MCU
Input pin PTB5 can be connected to failure detection result output end N-1 by the 6th resistance R6, and be grounded by the 7th resistance R7.
Output pin PTB0, PTB1, PTB2, PTB3 of control chip MCU is connected respectively the end D-T2, D-T1, D-T4, D-T3,
It is connected respectively to the driving signal input of different car light circuits.In addition, as shown in figure 3, the VDD pin of control chip MCU
It is connected to 5V DC power supply, PTA5, PTA4 pin pass through the 8th resistance R8 respectively, the 9th resistance R9 is connected to 5V DC power supply,
5V DC power supply terminal also passes through capacitor C4 and is grounded, and PTA5 pin also passes through capacitor C5 and is grounded.With controlling the VSS pin of chip MCU
It connects, PTB4 pin is connected to 5V DC power supply by the tenth resistance R10.
Based on foregoing circuit structure, the first triode Q1 base voltage is 1.4V, because Q1 is in normally open state, base stage
Pressure difference with emitter is 0.7V, then emitter voltage is 0.7V, i.e., 3rd resistor R3 voltage difference is 0.7V, 3rd resistor R3's
Electric current is 0.7V/R3, because transistor collector electric current is identical with emitter, therefore LED branch current is 0.7V/R3, and LED is perseverance
Stream driving.When LED light works normally, the second NMOS tube MOS2 grid is high level, MOS2 conducting, first diode D1 input
End is low level, and failure detection result output end N-1 is low level；Conversely, when any one or more LED light failures, failure
Testing result output end N-1 is high level.
When the LED light in multiple car light circuits 10 works normally as a result, the failure of LED failure detection unit 12 is examined
It surveys result output end N-1 and exports low level, the input pin PTB5 that chip MCU is controlled in LED drive unit 20 detects low electricity
Flat, output pin PTB0, PTB1, PTB2, the PTB3 for controlling chip MCU export height to the end D-T2, D-T1, D-T4, D-T3 respectively
Level, the first NMOS tube MOS1 conducting of LED drive unit 13 in each car light circuit 10, the LED light in each car light circuit
Normal luminous；When any one or more LED light failures, the failure detection result output end N-1 of LED failure detection unit 12
High level is exported, the input pin PTB5 that chip MCU is controlled in LED drive unit 20 detects high level, control chip MCU's
Output pin PTB0, PTB1, PTB2, PTB3 export low level, each car light circuit to the end D-T2, D-T1, D-T4, D-T3 respectively
First NMOS tube MOS1 of LED drive unit 13 is turned off in 10, and the LED light in all car light circuits is extinguished, and realizes car light electricity
Road N-1 function.
Accordingly, the control of car light performed by the lamp lighting control circuit of embodiment of the present invention software flow is as shown in Figure 4.This
Software design and development modularization is reduced the coupling between module by inventive embodiments.The composition of software includes that bottom drives
Dynamic (Bottom Driver) and two modules of application program (App).Bottom layer driving includes WDG, GPIO, Timer, CCP, ADC,
The modules such as Interrupt management.For bottom layer driving module, accomplish the seamless connection of identical platform.Upper level applications are main
It is the code that calling and logical relation between modules are formed, application module then accomplishes hardware independence, using C language mould
Block Programming executes method using sequence, and principal function execution is protected from program with house dog and fails, system safety,
Stablize, efficiently.
In addition, in one embodiment of the invention, control chip MCU can also obtain the voltage of vehicle light power supply, and according to
The voltage of vehicle light power supply generates corresponding LED drive signal, to drive the LED light in each car light circuit to shine or extinguish.Tool
Body, when car light electric voltage exception, output pin PTB0, PTB1, PTB2, PTB3 of control chip MCU can be respectively to D-T2, D-
The end T1, D-T4, D-T3 exports low level, the first NMOS tube MOS1 shutdown of LED drive unit 13, institute in each car light circuit 10
There is the LED light in car light circuit to extinguish, realize circuit protection, improves circuit safety and stability.
Lamp lighting control circuit according to an embodiment of the present invention, by the LED failure detection unit in multiple car light circuits into
Row LED light fault detection generates corresponding LED drive signal according to detection signal by the control chip in control circuit, and
It drives the LED light in each car light circuit to shine or extinguish by the LED drive unit in multiple car light circuits, passes through as a result,
Car light N-1 function can be realized in relatively simple circuit structure, i.e., controls all LED light in any one LED light failure and extinguish,
So as to effectively remind the timely renewal part of user, guarantee driving safety, since circuit structure is simple, circuit cost is lower,
Reliability and stability are higher.
Corresponding above-described embodiment, the present invention also propose a kind of vehicle.
The vehicle of the embodiment of the present invention, it is specific including lamp lighting control circuit described in any of the above-described embodiment of the present invention
Embodiment can refer to above-described embodiment, and to avoid redundancy, details are not described herein.
Vehicle according to an embodiment of the present invention can be realized car light N-1 function by relatively simple circuit structure, that is, exist
All LED light are controlled when any one LED light failure to extinguish, and so as to effectively remind the timely renewal part of user, ensure driving
Safety, since circuit structure is simple, circuit cost is lower, reliability and stability are higher.
In the description of the present invention, term " first ", " second " are used for description purposes only, and should not be understood as instruction or dark
Show relative importance or implicitly indicates the quantity of indicated technical characteristic.The feature of " first ", " second " is defined as a result,
It can explicitly or implicitly include one or more of the features.The meaning of " plurality " is two or more, unless
Separately there is clearly specific restriction.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of lamp lighting control circuit, which is characterized in that including multiple car light circuits and control circuit, each car light circuit
Including at least one LED light, LED failure detection unit and LED drive unit, the LED failure detection unit is according to place vehicle
The malfunction of each LED light generates detection signal in circuit for lamp, and the LED failure detection unit includes to export the inspection
The failure detection result output end of signal is surveyed, the LED drive unit includes defeated to input the driving signal of LED drive signal
Enter end, the control circuit includes the control chip of model KEA8, the input pin and each vehicle of the control chip
Failure detection result output end in circuit for lamp is connected, in the output pin and each car light circuit of the control chip
Driving signal input is connected, and the control chip generates the corresponding LED drive signal according to the detection signal, to drive
It moves the LED light in each car light circuit to shine or extinguish, the voltage for controlling chip and also obtaining vehicle light power supply, and according to
The voltage of the vehicle light power supply generates the corresponding LED drive signal, to drive the LED light in each car light circuit to send out
Light or extinguishing.
2. lamp lighting control circuit according to claim 1, which is characterized in that each car light circuit includes one or more
The LED branch that a LED light being connected in series is constituted, one end of the LED branch is connected to vehicle light power supply.
3. lamp lighting control circuit according to claim 2, which is characterized in that the LED drive unit includes the one or three pole
Pipe and the first NMOS tube, the collector of first triode are connected with the other end of the LED branch, first NMOS tube
Grid be connected with one end of first resistor, the other end of the first resistor is as the driving signal input, described
The source electrode of one NMOS tube is grounded, and second resistance, the first NMOS are connected between the source electrode and grid of first NMOS tube
The drain electrode of pipe is connected to the emitter of first triode by 3rd resistor.
4. lamp lighting control circuit according to claim 3, which is characterized in that the LED failure detection unit includes second
The grid of NMOS tube and first diode, second NMOS tube is connected to the other end of the LED branch by the 4th resistance,
The source electrode of second NMOS tube is grounded, and the drain electrode of second NMOS tube is connected to the vehicle light power supply by the 5th resistance,
The anode of the first diode is connected with the drain electrode of second NMOS tube, and the cathode of the first diode is as the event
Hinder testing result output end.
5. lamp lighting control circuit according to claim 4, which is characterized in that the input pin of the control chip passes through the
Six resistance are connected to the failure detection result output end, and pass through the 7th resistance eutral grounding.
6. lamp lighting control circuit according to claim 4, which is characterized in that each car light circuit further include it is corresponding with
Each LED light one or more protection capacitors in parallel.
7. a kind of vehicle, which is characterized in that including lamp lighting control circuit according to claim 1 to 6.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910188512.8A CN109661076B (en) | 2019-03-13 | 2019-03-13 | Lamp lighting control circuit and vehicle |
| PCT/CN2019/100333 WO2020181717A1 (en) | 2019-03-13 | 2019-08-13 | Vehicle lamp control circuit and vehicle |
| DE212019000432.6U DE212019000432U1 (en) | 2019-03-13 | 2019-08-13 | Control circuit for vehicle lights and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910188512.8A CN109661076B (en) | 2019-03-13 | 2019-03-13 | Lamp lighting control circuit and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109661076A CN109661076A (en) | 2019-04-19 |
| CN109661076B true CN109661076B (en) | 2019-06-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910188512.8A Active CN109661076B (en) | 2019-03-13 | 2019-03-13 | Lamp lighting control circuit and vehicle |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN109661076B (en) |
| DE (1) | DE212019000432U1 (en) |
| WO (1) | WO2020181717A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109661076B (en) * | 2019-03-13 | 2019-06-11 | 常州星宇车灯股份有限公司 | Lamp lighting control circuit and vehicle |
| CN110187295A (en) * | 2019-05-27 | 2019-08-30 | 常州星宇车灯股份有限公司 | The fault monitoring method of the fault monitoring system of car light, vehicle and car light |
| CN110290614A (en) * | 2019-05-27 | 2019-09-27 | 常州星宇车灯股份有限公司 | Intelligent vehicle beacon light control system, vehicle and control method with it |
| CN110177411A (en) * | 2019-05-27 | 2019-08-27 | 常州星宇车灯股份有限公司 | Logo lamp control system, the vehicle with it and logo lamp control method |
| CN115107725B (en) * | 2022-07-20 | 2024-10-29 | 福建康博电子技术股份有限公司 | Driving and braking control circuit of automobile |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203467047U (en) * | 2013-09-29 | 2014-03-05 | 常州星宇车灯股份有限公司 | Intelligent fault detecting and alarming system for LED lamp sets |
| CN103561527B (en) * | 2013-11-19 | 2015-09-09 | 神龙汽车有限公司 | A kind of dual-function LED drive circuit |
| CN105263248B (en) * | 2015-10-29 | 2017-08-04 | 奇瑞汽车股份有限公司 | A kind of failure feedback protection circuit of automobile-used LED daytime running lamps |
| CN107512216B (en) * | 2017-07-25 | 2020-10-09 | 奇瑞汽车股份有限公司 | Control circuit of automobile daytime running lamp and position lamp integrated lamp |
| CN207565465U (en) * | 2017-10-27 | 2018-07-03 | 常州星宇车灯股份有限公司 | A kind of fault diagnosis reponse system of automobile LED car light |
| CN108569212B (en) * | 2017-10-27 | 2024-07-26 | 常州星宇车灯股份有限公司 | Fault diagnosis feedback system of automobile LED lamp |
| CN109661076B (en) * | 2019-03-13 | 2019-06-11 | 常州星宇车灯股份有限公司 | Lamp lighting control circuit and vehicle |
-
2019
- 2019-03-13 CN CN201910188512.8A patent/CN109661076B/en active Active
- 2019-08-13 DE DE212019000432.6U patent/DE212019000432U1/en active Active
- 2019-08-13 WO PCT/CN2019/100333 patent/WO2020181717A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020181717A1 (en) | 2020-09-17 |
| DE212019000432U1 (en) | 2021-07-13 |
| CN109661076A (en) | 2019-04-19 |
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