CN208143090U - charge pump - Google Patents
charge pump Download PDFInfo
- Publication number
- CN208143090U CN208143090U CN201820484742.XU CN201820484742U CN208143090U CN 208143090 U CN208143090 U CN 208143090U CN 201820484742 U CN201820484742 U CN 201820484742U CN 208143090 U CN208143090 U CN 208143090U
- Authority
- CN
- China
- Prior art keywords
- charge
- capacitor
- module
- discharge
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
A kind of charge pump, including level switch module, Logic control module, capacitor charge and discharge module, detection circuit module and output module, the level switch module, Logic control module, capacitor charge and discharge module are connected with the output module sequence, detection circuit module one end is connected between the capacitor charge and discharge module and the output module, the other end is connected with the Logic control module, the capacitor charge and discharge module includes the first pump capacitor and the second pump capacitor, and the charge and discharge timing that the first pump capacitor and described second pump capacitor is opposite.The pump capacitor that capacitor charge and discharge module in above-mentioned charge pump uses two charge and discharge timing opposite, smaller to the fluctuation of power supply, the picture that LCD is shown is more stable.
Description
Technical field
The utility model relates to technical field of integrated circuits, more particularly to a kind of charge pump.
Background technique
Liquid crystal display (LCD), can be direct with large scale integrated circuit due to small in size, low in energy consumption, frame stabilization
The advantage of driving gradually replaces the dominant position of cathode-ray tube (CRT).In order to make in LCD driving circuit (LCD driver)
Gate driving circuit (gate driver) works normally, and the positive voltage that general charge pump provides will reach 7.3v~20v or so,
Negative voltage will generally reach -5.3v~-18v, and the difference of positive voltage and negative voltage is resistance to no more than the high-voltage tube that technique factory gives
Pressure value.Positive voltage is used to the disposable programmable memory (OTP) or time-after-time programmable memory in LCD driving circuit simultaneously
(MTP) circuit provides burning voltage, and general burning voltage is in 8v~8.5v.So needing charge pump in LCD driving circuit
Supply voltage is further increased, so that high-tension circuit can work normally.
Simultaneously for the external power supply that charge pump is boosted be also entire driving chip external power supply, extraneous power supply makes an uproar
Sound size has a significant impact for source electrode drive circuit (source driver), will affect the image quality of LCD.And charge pump
During charge and discharge, have a big electric current, electric current generates pressure drop by resistance, cause the power supply of source electrode drive circuit with
The capacitor charge and discharge of charge pump changes, and influences the image quality of LCD.
Utility model content
Based on this, it is necessary to for current charge pump during charge and discharge, have big electric current, electric current passes through resistance
Pressure drop is generated, causes the power supply of source electrode drive circuit to change with the capacitor charge and discharge of charge pump, influences the image quality of LCD
Problem provides a kind of charge pump.
One kind includes level switch module, Logic control module, capacitor charge and discharge module, detection circuit module and output mould
Block, the level switch module, Logic control module, capacitor charge and discharge module are connected with the output module sequence, the inspection
Slowdown monitoring circuit module one end is connected between the capacitor charge and discharge module and the output module, the other end and the logic control
Module is connected, and the capacitor charge and discharge module includes the first pump capacitor and the second pump capacitor, the first pump capacitor and described the
The charge and discharge timing of two pump capacitors is opposite.
The detection circuit module includes voltage comparator in one of the embodiments, and the voltage comparator is used for
Compare the capacitor charge and discharge module output voltage and setting voltage, and outputs signal to the Logic control module, it is described to patrol
It collects control module and the capacitor charge and discharge module progress charge and discharge is controlled according to the signal of the voltage comparator.
The capacitor charge and discharge module includes multiple switch device in one of the embodiments, and the switching device is used
When controlling the charge and discharge of the first pump capacitor and the second pump capacitor according to the control instruction of the Logic control module
Sequence.
The switching device includes PMOS tube and NMOS tube in one of the embodiments,.
At least one of described switching device is grounded in one of the embodiments,.
The capacitor charge and discharge module includes 9 switching devices in one of the embodiments,.
The switching device includes 4 PMOS tube and 5 NMOS tubes in one of the embodiments,.
The level switch module is step-up transformer in one of the embodiments,.
The capacitor charge and discharge module includes 3 kinds of working methods in one of the embodiments, for adapting to different loads
The case where.
Capacitor charge and discharge module one end is connected with power supply in one of the embodiments, and the power supply can generate
Polarity is opposite, identical two input voltages of absolute value.
The pump capacitor that capacitor charge and discharge module in above-mentioned charge pump uses two charge and discharge timing opposite, to the wave of power supply
Dynamic smaller, the picture that LCD is shown is more stable.
Detailed description of the invention
Fig. 1 is the schematic diagram of the charge pump of the embodiments of the present invention；
Fig. 2 is the circuit diagram of the capacitor charge and discharge module of the charge pump of the embodiments of the present invention；
Fig. 3 (a) is the capacitor charge and discharge module of the charge pump of the embodiments of the present invention with the third boosting mode liter
Simplified electrical circuit diagram when pressure；
Fig. 3 (b) is the first pump capacitor electric discharge in the capacitor charge and discharge module of the charge pump of the embodiments of the present invention, the
The current flow diagram of two pump capacitor charging processes；
Fig. 3 (c) is the first pump capacitor charging mistake in the capacitor charge and discharge module of the charge pump of the embodiments of the present invention
The current flow diagram of journey；
Fig. 3 (d) is that the second pump capacitor discharged in the capacitor charge and discharge module of the charge pump of the embodiments of the present invention
The current flow diagram of journey；
Fig. 4 (a) is circuit diagram of two capacitors of existing charge pump with phase charge and discharge；
Fig. 4 (b) is that wherein the current direction of first capacitor part shows in two capacitors of existing charge pump while charging process
It is intended to；
Fig. 4 (c) is that wherein the current direction of the second capacitive part shows in two capacitors of existing charge pump while charging process
It is intended to；
Fig. 4 (d) is the current flow diagram of two capacitors of existing charge pump while discharge process.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Referring to Figure 1, Fig. 1 is the schematic diagram of the charge pump of the embodiments of the present invention.In the present embodiment, the charge
Pump is used in liquid crystal display, for making the gate driving circuit in liquid crystal display drive circuit work.
In the present embodiment, the charge pump includes level switch module 11, Logic control module 12, capacitor charge and discharge mould
Block 13, detection circuit module 15 and output module 14, the level switch module 11, Logic control module 12, capacitor charge and discharge
Module 13 is sequentially connected with the output module 14, and described 15 one end of detection circuit module is connected to the capacitor charge and discharge module
Between 13 and the output module 14, the other end is connected with the Logic control module 12.The capacitor charge and discharge module 13 is wrapped
Include the pump of the first pump capacitor C1 and second capacitor C2, the charge and discharge timing phase of the first pump capacitor C1 and the second pump capacitor C2
Instead.
In the present embodiment, the level switch module 11 is used to the low pressure that power supply provides be converted into middle pressure.It is described to patrol
Volume control module 12 is used for the switching by clock, control the charging and discharging of pump capacitor described in capacitor charge and discharge module 13 with
Complete boosting.The output module 14 is for the voltage output after boosting into next circuit.Specifically, the logic control
Module 12 can need to only play control action using common control chip based on the feedback signal.Specifically, the level turns
Step-up transformer or other elements can be used by changing the mold block 11, need to only play the role of level conversion.
In the present embodiment, the detection circuit module 15 includes voltage comparator, and the voltage comparator sets voltage
For VREF, the output voltage of the capacitor charge and discharge module 13 can be sent to the detection circuit module 15, after electric resistance partial pressure
It is compared with reference voltage VREF, when detecting that voltage had reached target value, then feedback signal passes through the logic control
Molding block 12 controls the capacitor charge and discharge module 13 and stops boosting, when detecting that voltage lower than target value, then continues to rise
Press through journey.The detection circuit module 15 can use other elements, only need to play comparison voltage and export the effect of unlike signal
Fruit.
Fig. 2 is referred to, Fig. 2 is the circuit diagram of the capacitor charge and discharge module 13 of the charge pump of the embodiments of the present invention.
In the present embodiment, the capacitor charge and discharge module 13 includes first switch tube M11, second switch M11A, the
Three switching tube M12, the 4th switching tube M12A, the 5th switching tube M21, the 6th switching tube M22, the 7th switching tube M22A, the 8th open
Close pipe M31, the 9th switching tube M32A, the first pump capacitor C1, the second pump capacitor C2, resistance Resr and output capacitance Cout.It is described
5th one end switching tube M21 is connected with ground voltage, and the 5th switching tube M21, the second pump capacitor C2, the described 7th open
Close pipe M22A, the first pump capacitor C1 is connected with the 4th switching tube M12A sequence, the 4th switching tube and described the
The one pump capacitor C1 connected other end is connected with the resistance Resr, the resistance Resr other end and the output capacitance Cout
It is connected, the output capacitance Cout other end ground connection.The first switch tube M11 and third switching tube M12 is in parallel and connects
It connects at first pump both ends capacitor C1, the 8th switching tube M31 is in parallel with the third switching tube M12 and one end is connected to
Between the 5th switching tube M21 and the second pump voltage C2, the other end is connected to the 7th switching tube M22A and described
Between first pump capacitor C1.The 6th switching tube M22 is in parallel with the 9th switching tube M32A and is connected to second pump
The both ends capacitor C2, the 9th switching tube M32A is in parallel with the second switch M11A and is connected to the 7th switching tube
The both ends M22A.In the present embodiment, the first switch tube M11, third switching tube M12, the 4th switching tube M12A and the 8th are opened
Close the PMOS tube that pipe M31 is high pressure, the second switch M11A, the 5th switching tube M21, the 6th switching tube M22, the 7th switch
Pipe M22A and the 9th switching tube M32A is the NMOS tube of high pressure.In other embodiments, the switching tube can use CMOS tube etc.
Device substitutes, and need to only play on-off action.In other embodiments, the capacitor charge and discharge module can use other
Switching device and connection type need to only play the effect for controlling the charge and discharge timing of the first pump capacitor and the second pump capacitor
Fruit.
In Fig. 2, VH is external positive voltage, and VL is external negative supply voltage, and VH is equal with the absolute value of VL, and V0 is
Ground voltage.In light load, while when output voltage is lower, the external first pump electricity of the capacitor charge and discharge module 13
Hold C1, with the first boosting mode.There was only first switch tube M11, second switch M11A, third switching tube in this manner
This four switching tube work of M12, the 4th switching tube M12A, other switching tubes are in the state of closing, and the second pump capacitor C2 is not
External, first switch tube M11, second switch M11A, third switching tube M12, this four switching tubes of the 4th switching tube M12A are logical
Cross the non-overlapping clock control of two-phase.During charging, first switch tube M11 and second switch M11A are opened, and third is opened
Pipe M12 and the 4th switching tube M12A is closed to close, to the first pump capacitor C1 charging, the ideally described first pump capacitor C1
Final charging charge Q1 be：
Q1=C1* (VH-VL) (1)
During electric discharge, third switching tube M12 and the 4th switching tube M12A are opened, first switch tube M11 and second
Switching tube M11A is closed, and the charge Q 2 on the ideally described first pump capacitor C1 is：
Q2=C1* (VOUT-VH) (2)
Meanwhile during electric discharge, the charge on the first pump capacitor C1 will be transferred to above the output capacitance Cout,
If time long enough, theoretically:
VOUT=2*VH-VL=3*VH (3)
So the high level that the first boosting mode can be finally raised to is 3 times of supply voltage.
In heavier loads, when output voltage is lower, external two pumps capacitor C1 and C2, with second of boosting mode.
There was only the 5th switching tube M21, the 9th switching tube M32A, the 6th switching tube M22, the 7th switching tube M22A, the in this manner
One switching tube M11, third switching tube M12, the 4th switching tube M12A this seven switching tubes are working, wherein the 5th switching tube M21,
9th switching tube M32A, third switching tube M12, the 4th switching tube M12A control clock be same phase, the 6th switching tube M22,
7th switching tube M22A, first switch tube M11 control clock be same phase.Namely second pump capacitor C2 discharge process, just
It is the charging process of the first pump capacitor C1.First by opening the 5th switching tube M21 and the 9th switching tube M32A to the second pump electricity
Hold C2 charging, the voltage of A point is equal to V0 during charging, and the voltage of B point is equal to VL.Next clock second pumps capacitor C2
Start to discharge, by the process of capacitor charge and discharge, the voltage of C point is：
VC=2*VL-V0 (4)
During the second pump capacitor C2 electric discharge, the first pump capacitor C1 charges simultaneously, and the voltage of D point is VH, institute at this time
It can be expressed as with the charge Q 3 of the first pump capacitor C1 at this time：
Q3=C1* (VH-VC)=C1* (VH-2*VL+V0) (5)
In subsequent time, the first pump capacitor C1 starts to discharge, and the second pump capacitor C2 is started to charge, at this time the 6th switching tube
M22, the 7th switching tube M22A, first switch tube M11 are closed, the 5th switching tube M21, the 9th switching tube M32A, third switching tube
M12, the 4th switching tube M12A are opened.The charge Q 4 at the first pump both ends capacitor C1 is expressed as：
Q4=C1* (VOUT-VH) (6)
VOUT, which can be derived, by formula (4) and (5) is:
VOUT=2*H-2*L+V0=4*VH (7)
So second of boosting mode voltage can be raised to 4 times of supply voltage.
In heavier loads, when output voltage is higher, external two pumps capacitor C1 and C2, with the third boosting mode.
There was only the 8th switching tube M31, the 9th switching tube M32A, the 6th switching tube M22, the 7th switching tube M22A, the in this manner
This seven switching tubes work of one switching tube M11, third switching tube M12, the 4th switching tube M12A, wherein the 8th switching tube M31, the
Nine switching tube M32A, third switching tube M12, the 4th switching tube M12A are the control clock of same phase, the 6th switching tube M22, the 7th
Switching tube M22A, first switch tube M11 are the control clocks of same phase.When the second pump capacitor C2 charging, A point voltage is
VH, B point voltage are VL, and during the second pump capacitor C2 electric discharge, A point voltage is VL, and C point voltage is indicated by following formula：
VC=2*VL-VH (8)
During the first pump capacitor C1 charging, charge Q 5 is provided by following formula：
Q5=C1* (VH-VC)=C1* (2*VH-2*VL) (9)
During the first pump capacitor C1 electric discharge, charge Q 6 is provided by following formula：
Q6=C1* (VOUT-VH) (10)
So the voltage for finally obtaining VOUT is expressed from the next：
VOUT=3*VH-2*VL=5*VH (11)
Therefore, the third boosting mode can be raised to 5 times of supply voltage.
Fig. 3 (a), Fig. 3 (b) are referred to, Fig. 3 (a) is the capacitor charge and discharge mould of the charge pump of the embodiments of the present invention
Simplified electrical circuit diagram when block 13 is with the boosting of the third boosting mode, Fig. 3 (b) are the electricity of the charge pump of the embodiments of the present invention
Hold the first pump capacitor electric discharge C1, the current flow diagram of the second pump capacitor C2 charging process in charge-discharge modules 13.At this
In the process, if time long enough, the voltage value 2*VL-VH of B point is a negative pressure value, in this course, power supply VH and VL
There is current direction B point.The electric current that VH flows through B point is Ivh11, and the electric current that VL flows through B point is Ivl11.At this time：
Wherein C is the capacitance of the first pump capacitor C1 and the second pump capacitor C2, RVHWith RVLIt is non-essential resistance.
Fig. 3 (c), Fig. 3 (d) are referred to, Fig. 3 (c) is the capacitor charge and discharge mould of the charge pump of the embodiments of the present invention
The current flow diagram of first pump capacitor charging process, Fig. 3 (d) are the charge pump of the embodiments of the present invention in block 13
The current flow diagram of second pump capacitor discharge process in capacitor charge and discharge module 13.In this course, the electricity that VH flows through
Stream is Ivh12, and the electric current that VL flows through is Ivl12.From the flow direction of electric current as can be seen that the process and that the second pump capacitor C2 discharges
One pump capacitor C1 charging during, electric current with respect to VH power supply flow direction on the contrary, making the voltage fluctuation of VH smaller.This
When：
So the electric current that VH flows through during the second pump capacitor C2 electric discharge is the process VH stream of the second pump capacitor charging
The half for the electric current crossed.
Fig. 4 (a) to Fig. 4 (d) is referred to, Fig. 4 (a) is circuit diagram of two capacitors of existing charge pump with phase charge and discharge, Fig. 4
It (b) is two capacitors of existing charge pump wherein current flow diagram of first capacitor part in charging process simultaneously, Fig. 4 (c)
For two capacitors of existing charge pump wherein current flow diagram of the second capacitive part in charging process simultaneously, Fig. 4 (d) is existing
There is the current flow diagram of two capacitors of charge pump while discharge process.During two capacitor chargings, power supply VH and VL
Simultaneously to capacitor charging, so that the comparison of power supply VH and VL fluctuation is severe, noise is bigger.At this time：
During two capacitors discharge simultaneously, only power supply VH is pulled at this time, and power supply VL is not pulled.This
When：
Compare formula (12)~(18) it can be concluded that, Fig. 3 (a) to Fig. 3 (d) be current balance be distributed in the first pump electricity
The charge and discharge stage for holding the pump of C1 and second capacitor C2, so smaller to the fluctuation of power supply VH and VL.But Fig. 4 (a) arrives Fig. 4 (d)
Electric current compares concentration during capacitor charging, so while charging, can cause bigger wave to power supply VH and VL
It is dynamic.
The capacitor charge and discharge module 13 of the above-mentioned charge pump pump capacitor opposite using two charge and discharge timing, to the wave of power supply
Dynamic smaller, the picture that LCD is shown is more stable.The charge pump of the embodiments of the present invention can also be according to payload size simultaneously
And boost value size, select a pump capacitance boost or two pump capacitors to boost simultaneously when practical application.Only use
When one pump capacitance boost, another pump capacitor and its switching sequence will not have any influence to it, more adaptable,
It is easy to spread.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of charge pump, including level switch module, Logic control module, capacitor charge and discharge module, detection circuit module and
Output module, the level switch module, Logic control module, capacitor charge and discharge module are connected with the output module sequence,
Detection circuit module one end is connected between the capacitor charge and discharge module and the output module, and the other end is patrolled with described
Volume control module is connected, which is characterized in that and the capacitor charge and discharge module includes the first pump capacitor and the second pump capacitor, and described the
The charge and discharge timing of one pump capacitor and the second pump capacitor is opposite.
2. charge pump according to claim 1, which is characterized in that the detection circuit module includes voltage comparator, institute
Voltage comparator is stated for the capacitor charge and discharge module output voltage and setting voltage, and outputs signal to the logic
Control module, the Logic control module control the capacitor charge and discharge module according to the signal of the voltage comparator and are filled
Electric discharge.
3. charge pump according to claim 2, which is characterized in that the capacitor charge and discharge module includes multiple switch dress
It sets, the switching device is used for according to the control instruction of Logic control module control the first pump capacitor and described second
Pump the charge and discharge timing of capacitor.
4. charge pump according to claim 3, which is characterized in that the switching device includes PMOS tube and NMOS tube.
5. charge pump according to claim 3, which is characterized in that at least one of described switching device ground connection.
6. charge pump according to claim 3, which is characterized in that the capacitor charge and discharge module includes 9 switching devices.
7. charge pump according to claim 6, which is characterized in that the switching device includes 4 PMOS tube and 5 NMOS
Pipe.
8. charge pump according to claim 1, which is characterized in that the level switch module is step-up transformer.
9. charge pump according to claim 1, which is characterized in that the capacitor charge and discharge module includes 3 kinds of working methods,
The case where for adapting to different loads.
10. charge pump according to claim 1, which is characterized in that capacitor charge and discharge module one end is connected with power supply,
The power supply can generate that polarity is opposite, identical two input voltages of absolute value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820484742.XU CN208143090U (en) | 2018-04-03 | 2018-04-03 | charge pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820484742.XU CN208143090U (en) | 2018-04-03 | 2018-04-03 | charge pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208143090U true CN208143090U (en) | 2018-11-23 |
Family
ID=64291954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820484742.XU Active CN208143090U (en) | 2018-04-03 | 2018-04-03 | charge pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208143090U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371156A (en) * | 2020-05-27 | 2020-07-03 | 北京小米移动软件有限公司 | Charging circuit, charging control method and device, electronic device, and storage medium |
-
2018
- 2018-04-03 CN CN201820484742.XU patent/CN208143090U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371156A (en) * | 2020-05-27 | 2020-07-03 | 北京小米移动软件有限公司 | Charging circuit, charging control method and device, electronic device, and storage medium |
| CN111371156B (en) * | 2020-05-27 | 2020-09-04 | 北京小米移动软件有限公司 | Charging circuit, charging control method and device, electronic device, and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101090230B (en) | Booster power supply circuit and control method therefor and driver IC | |
| CN106873695B (en) | Charge injection type switched capacitor voltage stabilizer applied to high load current | |
| CN105356742B (en) | A kind of high efficiency charge pump | |
| US10263517B2 (en) | Voltage boosting circuit capable of modulating duty cycle automatically | |
| CN103066832A (en) | Charge pump capable of being started quickly | |
| CN106505847A (en) | It is applied to the segmentation soft starting circuit of step-up DC DC | |
| CN105186636B (en) | power charging circuit | |
| WO2020124769A1 (en) | Display panel driving circuit | |
| CN104518662B (en) | Half voltage specific charge pump circuit | |
| WO2020233383A1 (en) | High energy efficiency switch capacitor power converter | |
| CN208143090U (en) | charge pump | |
| CN101505094A (en) | Electric power supply module for portable equipment | |
| CN206272481U (en) | A kind of power control circuit and apply its Switching Power Supply | |
| CN202455320U (en) | RC (resistor-capacitor) filter correction circuit | |
| CN116707278B (en) | Bootstrap capacitor charging control circuit and DC-DC conversion circuit | |
| CN106448596B (en) | Shift register and its driving method, gate driving circuit and display device | |
| CN107644609A (en) | The circuit and driving method, gate driving circuit of GOA signal end signal amplitudes during lifting shutdown | |
| CN106655749A (en) | Power supply control circuit and switch power supply applying same | |
| CN106300492B (en) | power supply system and display device | |
| CN103475218A (en) | Circuit, method and displaying device for adjusting grid electrode opening voltage | |
| CN106374738B (en) | A kind of Fibonacci charge pump | |
| CN201281929Y (en) | Boosted circuit, liquid crystal drive deivce and liquid crystal display device | |
| TWI415098B (en) | Gate driver and operating method thereof | |
| CN104300783B (en) | A kind of regulating circuit and array base palte | |
| CN205647262U (en) | Charge pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518101 Room 310, 311, 2-4/F, Building A1, No. 5175, Yiyuan Road, 74 Xin'an Street, Bao'an District, Shenzhen, Guangdong Province Patentee after: Shenzhen Aixiesheng Technology Co.,Ltd. Address before: 518101 Room 310, 311, 2-4/F, Building A1, No. 5175, Yiyuan Road, 74 Xin'an Street, Bao'an District, Shenzhen, Guangdong Province Patentee before: SHENZHEN AIXIESHENG TECHNOLOGY Co.,Ltd. |