CN104994654B - A kind of LED drive circuit - Google Patents
A kind of LED drive circuit Download PDFInfo
- Publication number
- CN104994654B CN104994654B CN201510413040.3A CN201510413040A CN104994654B CN 104994654 B CN104994654 B CN 104994654B CN 201510413040 A CN201510413040 A CN 201510413040A CN 104994654 B CN104994654 B CN 104994654B
- Authority
- CN
- China
- Prior art keywords
- electric capacity
- resistance
- grounded
- rectifier bridge
- diode
- 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
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims description 24
- 239000004065 semiconductor Substances 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 230000010455 autoregulation Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
A kind of LED drive circuit, including AC power AC, current rectifying and wave filtering circuit, LED control circuit, the LED circuit being sequentially connected.Beneficial effects of the present invention are：When supply voltage fluctuates, remain to keep the electric current of LED drive circuit to fluctuate in less scope, autoregulation is played when system disturbs by circuit, make output voltage and electric current stable.
Description
Technical field
The present invention relates to lighting field, especially a kind of LED drive circuit.
Background technology
With the development of science and technology, LED has small volume, power consumption is low, light efficiency is high, the life-span as new type light source
The advantages that long, environmentally friendly, it is widely used in lighting field, miscellaneous LED drive circuit consequently also occurs, actually should
In, the driving current of LED light source all has a direct impact to luminous efficiency and life-span.
All be at present that LED is driven using DC-DC wave chopping technologies in the place of low-voltage, it have small power consumption, efficiency high,
The advantages that reliable and stable, but its cost is high, circuit is complicated, fragile, has stronger High-frequency Interference, is brought not to user
Just.In the application, LED drive circuit needs to keep constant-current characteristics as far as possible, i.e., when supply voltage fluctuates, remains to keep
The electric current of LED drive circuit fluctuates in less scope.
The content of the invention
The technical problems to be solved by the invention are, there is provided a kind of LED drive circuit rational in infrastructure, can be in power supply electricity
During pressure life fluctuation, remain to keep the electric current of LED drive circuit to fluctuate in less scope, make output voltage and electric current steady
It is fixed.
In order to solve the above technical problems, the present invention provides a kind of LED drive circuit, including the AC power being sequentially connected
AC, current rectifying and wave filtering circuit, LED control circuit, LED circuit.
Preferably, current rectifying and wave filtering circuit is made up of rectifier bridge BD1 and filter capacitor.
Preferably, LED control circuit comprises at least a transformer T, a commutation diode D2, a control chip U1.
Preferably, transformer T includes armature winding, secondary windings and assists winding.
Preferably, the specific attachment structure of LED drive circuit is：1 end of the first rectifier bridge BD1 in current rectifying and wave filtering circuit
AC power AC positive pole is connect, is grounded after the first rectifier bridge BD1 2 the first electric capacity C1 of termination, the first rectifier bridge BD1 3 terminations
AC power AC negative pole, the first rectifier bridge BD1 4 ends are directly grounded；
Control chip U1 power end IN terminates the first rectifier bridge BD1 2 ends, and control chip U1 earth terminal GND ends are straight
Ground connection, control chip U1 control output end DRV terminate the first metal-oxide-semiconductor Q1 grid, control chip U1 feedback end FB ends
Connect the 5th resistance R5 and the 6th resistance R6 intermediate node；
A second electric capacity C2 first rectifier bridge BD1 of termination 2 ends, the other end are directly grounded；
A first resistor R1 first rectifier BD1 of termination 2 ends, the other end are connected with the first diode D1 negative electrode,
First diode D1 anode connects the first metal-oxide-semiconductor Q1 drain electrode, and the 3rd electric capacity C3 is connected in parallel on first resistor R1 both ends；
Transformer T armature winding one terminates the first rectifier bridge BD1 2 ends, the first metal-oxide-semiconductor Q1 of another termination drain electrode；
Transformer T secondary windings one end connects series LED concatenation ground after the second diode D2, and the 7th electric capacity C7 of another termination is followed by
Ground；The second diode D2 both ends are connected in parallel on after the 4th electric capacity C4 of second resistance R2 series connection；5th electric capacity C5 mono- terminations the two or two
Pole pipe D2 negative electrode, it is grounded after the 7th electric capacity C7 of another termination；6th electric capacity C6 is connected in parallel on the 5th electric capacity C5 both ends, the 3rd electricity
Resistance R3 is connected in parallel on the 6th electric capacity C6 both ends；Transformer T assists winding one end is sequentially connected the 3rd diode D3, the 4th resistance
It is grounded after R4, the 5th resistance R5, the 6th resistance R6, the first metal-oxide-semiconductor Q1 of another termination source electrode；8th electric capacity C8, which is connected in parallel on, mutually to go here and there
5th resistance R5 of connection and the 6th resistance R6 both ends.
Preferably, the specific attachment structure of LED drive circuit is：1 end of the first rectifier bridge BD1 in current rectifying and wave filtering circuit
AC power AC positive pole is connect, is grounded after the first rectifier bridge BD1 2 the first electric capacity C1 of termination, the first rectifier bridge BD1 3 terminations
AC power AC negative pole, the first rectifier bridge BD1 4 ends are directly grounded；
A second electric capacity C2 first rectifier bridge BD1 of termination 2 ends, the other end are directly grounded；
Control chip U1 power end IN terminates the first rectifier bridge BD1 2 ends, and control chip U1 earth terminal GND ends are straight
Ground connection, control chip U1 control output end DRV terminate the grid of the first metal-oxide-semiconductor, control chip U1 feedback end FB ends according to
It is grounded after secondary connection the 4th resistance R4 and the 5th resistance R5；
A first resistor R1 first rectifier BD1 of termination 2 ends, the other end are connected with the first diode D1 negative electrode,
First diode D1 anode connects the first metal-oxide-semiconductor Q1 drain electrode, and the 3rd electric capacity C3 is connected in parallel on first resistor R1 both ends；
Transformer T armature winding one terminates the first rectifier bridge BD1 2 ends, the first metal-oxide-semiconductor Q1 of another termination drain electrode；
Transformer T secondary windings one end connects series LED concatenation ground after the second diode D2, the 7th electric capacity of another termination
It is grounded after C7；The second diode D2 both ends are connected in parallel on after the 4th electric capacity C4 of second resistance R2 series connection；5th electric capacity C5 mono- is terminated
Second diode D2 negative electrode, it is grounded after the 7th electric capacity C7 of another termination；6th electric capacity C6 is connected in parallel on the 5th electric capacity C5 both ends；
Optocoupler OC includes a phototriode and a light emitting diode, the colelctor electrode connection 3rd resistor R3 of phototriode
It is followed by the first rectifier bridge BD1 2 ends, the emitter stage of phototriode is grounded after connecting the 5th resistance R5；
Resistance R7 one end is connected to the anode of LED strip, and the other end is sequentially connected light emitting diode and source of stable pressure is followed by
Ten electric capacity C10 are grounded；8th resistance R8 one end is connected to the anode of LED strip, and the other end connects the tenth resistance R10 and is followed by the tenth electricity
Hold C 10 to be grounded；6th resistance R6 one end is connected to the intermediate node of the 7th resistance R7 and light emitting diode, and the other end is successively
It is grounded after connection source of stable pressure and the tenth electric capacity C10；8th electric capacity C8 and the 6th resistance R6, the 7th resistance R7, the 8th resistance R8 groups
Into a loop, the 8th electric capacity C8 both ends are connected in parallel on after the 9th resistance R9 and the 9th electric capacity C9 series connection.
Beneficial effects of the present invention are：When supply voltage fluctuates, remain to keep LED drive circuit electric current compared with
Fluctuated in small scope, autoregulation is played when system disturbs by circuit, make output voltage and electric current stable.
Brief description of the drawings
Fig. 1 is the integrated circuit block diagram of the present invention.
Fig. 2 is a kind of circuit structure of the LED drive circuit of the present invention.
Fig. 3 is another circuit structure of the LED drive circuit of the present invention.
Embodiment
As shown in figure 1, a kind of LED drive circuit, including the AC power AC, current rectifying and wave filtering circuit, the LED that are sequentially connected are controlled
Circuit and LED circuit processed.
As shown in Fig. 2 the 1 termination AC power AC of the first rectifier bridge BD1 in current rectifying and wave filtering circuit positive pole, first is whole
It is grounded after stream bridge BD1 2 the first electric capacity C1 of termination, the first rectifier bridge BD1 3 termination AC power AC negative pole, the first rectification
Bridge BD1 4 ends are directly grounded；
Control chip U1 power end IN terminates the first rectifier bridge BD1 2 ends, and control chip U1 earth terminal GND ends are straight
Ground connection, control chip U1 control output end DRV terminate the first metal-oxide-semiconductor Q1 grid, control chip U1 feedback end FB ends
Connect the 5th resistance R5 and the 6th resistance R6 intermediate node；
A second electric capacity C2 first rectifier bridge BD1 of termination 2 ends, the other end are directly grounded；
A first resistor R1 first rectifier BD1 of termination 2 ends, the other end are connected with the first diode D1 negative electrode,
First diode D1 anode connects the first metal-oxide-semiconductor Q1 drain electrode, and the 3rd electric capacity C3 is connected in parallel on first resistor R1 both ends；
Transformer T armature winding one terminates the first rectifier bridge BD1 2 ends, the first metal-oxide-semiconductor Q1 of another termination drain electrode；
Transformer T secondary windings one end connects series LED concatenation ground after the second diode D2, and the 7th electric capacity C7 of another termination is followed by
Ground；The second diode D2 both ends are connected in parallel on after the 4th electric capacity C4 of second resistance R2 series connection；5th electric capacity C5 mono- terminations the two or two
Pole pipe D2 negative electrode, it is grounded after the 7th electric capacity C7 of another termination；6th electric capacity C6 is connected in parallel on the 5th electric capacity C5 both ends, the 3rd electricity
Resistance R3 is connected in parallel on the 6th electric capacity C6 both ends；Transformer T assists winding one end is sequentially connected the 3rd diode D3, the 4th resistance
It is grounded after R4, the 5th resistance R5, the 6th resistance R6, the first metal-oxide-semiconductor Q1 of another termination source electrode；8th electric capacity C8, which is connected in parallel on, mutually to go here and there
5th resistance R5 of connection and the 6th resistance R6 both ends.
As shown in figure 3, the 1 termination AC power AC of the first rectifier bridge BD1 in current rectifying and wave filtering circuit positive pole, first is whole
It is grounded after stream bridge BD1 2 the first electric capacity C1 of termination, the first rectifier bridge BD1 3 termination AC power AC negative pole, the first rectification
Bridge BD1 4 ends are directly grounded；
A second electric capacity C2 first rectifier bridge BD1 of termination 2 ends, the other end are directly grounded；
Control chip U1 power end IN terminates the first rectifier bridge BD1 2 ends, and control chip U1 earth terminal GND ends are straight
Ground connection, control chip U1 control output end DRV terminate the grid of the first metal-oxide-semiconductor, control chip U1 feedback end FB ends according to
It is grounded after secondary connection the 4th resistance R4 and the 5th resistance R5；
A first resistor R1 first rectifier BD1 of termination 2 ends, the other end are connected with the first diode D1 negative electrode,
First diode D1 anode connects the first metal-oxide-semiconductor Q1 drain electrode, and the 3rd electric capacity C3 is connected in parallel on first resistor R1 both ends；
Transformer T armature winding one terminates the first rectifier bridge BD1 2 ends, the first metal-oxide-semiconductor Q1 of another termination drain electrode；
Transformer T secondary windings one end connects series LED concatenation ground after the second diode D2, the 7th electric capacity of another termination
It is grounded after C7；The second diode D2 both ends are connected in parallel on after the 4th electric capacity C4 of second resistance R2 series connection；5th electric capacity C5 mono- is terminated
Second diode D2 negative electrode, it is grounded after the 7th electric capacity C7 of another termination；6th electric capacity C6 is connected in parallel on the 5th electric capacity C5 both ends；
Optocoupler OC includes a phototriode and a light emitting diode, the colelctor electrode connection 3rd resistor R3 of phototriode
It is followed by the first rectifier bridge BD1 2 ends, the emitter stage of phototriode is grounded after connecting the 5th resistance R5；
Resistance R7 one end is connected to the anode of LED strip, and the other end is sequentially connected light emitting diode and source of stable pressure is followed by
Ten electric capacity C10 are grounded；8th resistance R8 one end is connected to the anode of LED strip, and the other end connects the tenth resistance R10 and is followed by the tenth electricity
Hold C 10 to be grounded；6th resistance R6 one end is connected to the intermediate node of the 7th resistance R7 and light emitting diode, and the other end is successively
It is grounded after connection source of stable pressure and the tenth electric capacity C10；8th electric capacity C8 and the 6th resistance R6, the 7th resistance R7, the 8th resistance R8 groups
Into a loop, the 8th electric capacity C8 both ends are connected in parallel on after the 9th resistance R9 and the 9th electric capacity C9 series connection.
Although the present invention is illustrated and described with regard to preferred embodiment, it is understood by those skilled in the art that
Without departing from scope defined by the claims of the present invention, variations and modifications can be carried out to the present invention.
Claims (2)
1. a kind of LED drive circuit, it is characterised in that including AC power AC, current rectifying and wave filtering circuit, the LED control being sequentially connected
Circuit processed, LED circuit；Described current rectifying and wave filtering circuit is made up of rectifier bridge BD1 and filter capacitor；Described LED control circuit
Including at least a transformer T, a commutation diode D2, a control chip U1；Described transformer T includes armature winding, secondary
Winding and assists winding；The specific attachment structure of LED drive circuit is：1 end of the first rectifier bridge BD1 in current rectifying and wave filtering circuit
AC power AC positive pole is connect, is grounded after the first rectifier bridge BD1 2 the first electric capacity C1 of termination, the first rectifier bridge BD1 3 terminations
AC power AC negative pole, the first rectifier bridge BD1 4 ends are directly grounded；Control chip U1 power end IN terminates the first rectification
Bridge BD1 2 ends, control chip U1 earth terminal GND ends are directly grounded, control chip U1 control output end DRV terminations first
Metal-oxide-semiconductor Q1 grid, control chip U1 feedback end FB terminations the 5th resistance R5 and the 6th resistance R6 intermediate node；Second electricity
Hold a C2 first rectifier bridge BD1 of termination 2 ends, the other end is directly grounded；A first resistor R1 first rectifier BD1 of termination
2 ends, the other end connects with the first diode D1 negative electrode, and the first diode D1 anode connects the first metal-oxide-semiconductor Q1 drain electrode,
Three electric capacity C3 are connected in parallel on first resistor R1 both ends；Transformer T armature winding one terminates the first rectifier bridge BD1 2 ends, the other end
Connect the first metal-oxide-semiconductor Q1 drain electrode；Transformer T secondary windings one end connects series LED concatenation ground after the second diode D2, another
It is grounded after terminating the 7th electric capacity C7；The second diode D2 both ends are connected in parallel on after the 4th electric capacity C4 of second resistance R2 series connection；5th
Electric capacity C5 mono- terminates the second diode D2 negative electrode, is grounded after the 7th electric capacity C7 of another termination；6th electric capacity C6 is connected in parallel on the 5th
Electric capacity C5 both ends, 3rd resistor R3 are connected in parallel on the 6th electric capacity C6 both ends；Transformer T assists winding one end is sequentially connected
It is grounded after three diode D3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the first metal-oxide-semiconductor Q1 of another termination source electrode；
8th electric capacity C8 is connected in parallel on the 5th resistance R5 being in series and the 6th resistance R6 both ends.
2. a kind of LED drive circuit, it is characterised in that including AC power AC, current rectifying and wave filtering circuit, the LED control being sequentially connected
Circuit processed, LED circuit；Described current rectifying and wave filtering circuit is made up of rectifier bridge BD1 and filter capacitor；Described LED control circuit
Including at least a transformer T, a commutation diode D2, a control chip U1；Described transformer T includes armature winding, secondary
Winding and assists winding；The specific attachment structure of LED drive circuit is：1 end of the first rectifier bridge BD1 in current rectifying and wave filtering circuit
AC power AC positive pole is connect, is grounded after the first rectifier bridge BD1 2 the first electric capacity C1 of termination, the first rectifier bridge BD1 3 terminations
AC power AC negative pole, the first rectifier bridge BD1 4 ends are directly grounded；A second electric capacity C2 first rectifier bridge BD1's of termination
2 ends, the other end are directly grounded；Control chip U1 power end IN terminates the first rectifier bridge BD1 2 ends, and control chip U1's connects
Ground terminal GND ends are directly grounded, and control chip U1 control output end DRV terminates the grid of the first metal-oxide-semiconductor, and control chip U1's is anti-
Feedback end FB ends are grounded after being sequentially connected the 4th resistance R4 and the 5th resistance R5；A first resistor R1 first rectifier BD1 of termination
2 ends, the other end connects with the first diode D1 negative electrode, and the first diode D1 anode connects the first metal-oxide-semiconductor Q1 drain electrode,
Three electric capacity C3 are connected in parallel on first resistor R1 both ends；Transformer T armature winding one terminates the first rectifier bridge BD1 2 ends, the other end
Connect the first metal-oxide-semiconductor Q1 drain electrode；Transformer T secondary windings one end connects series LED concatenation ground after the second diode D2, another
It is grounded after terminating the 7th electric capacity C7；The second diode D2 both ends are connected in parallel on after the 4th electric capacity C4 of second resistance R2 series connection；5th
Electric capacity C5 mono- terminates the second diode D2 negative electrode, is grounded after the 7th electric capacity C7 of another termination；6th electric capacity C6 is connected in parallel on the 5th
Electric capacity C5 both ends；Optocoupler OC includes a phototriode and a light emitting diode, the colelctor electrode connection the 3rd of phototriode
Resistance R3 is followed by the first rectifier bridge BD1 2 ends, and the emitter stage of phototriode is grounded after connecting the 5th resistance R5；Resistance R7
One end be connected to the anode of LED strip, the other end is sequentially connected light emitting diode and source of stable pressure is followed by the tenth electric capacity C10 ground connection；
8th resistance R8 one end is connected to the anode of LED strip, and the tenth resistance R10 of other end connection is followed by the tenth electric capacity C 10 and is grounded；The
Six resistance R6 one end is connected to the intermediate node of the 7th resistance R7 and light emitting diode, and the other end is sequentially connected source of stable pressure and
It is grounded after ten electric capacity C10；One 8th electric capacity C8 and the 6th resistance R6, the 7th resistance R7, the 8th resistance R8 compositions loop, the 9th
The 8th electric capacity C8 both ends are connected in parallel on after resistance R9 and the 9th electric capacity C9 series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510413040.3A CN104994654B (en) | 2015-07-14 | 2015-07-14 | A kind of LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510413040.3A CN104994654B (en) | 2015-07-14 | 2015-07-14 | A kind of LED drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104994654A CN104994654A (en) | 2015-10-21 |
| CN104994654B true CN104994654B (en) | 2018-03-13 |
Family
ID=54306369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510413040.3A Active CN104994654B (en) | 2015-07-14 | 2015-07-14 | A kind of LED drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104994654B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201063902Y (en) * | 2007-03-08 | 2008-05-21 | 宁波安迪光电科技有限公司 | LED driving power supply |
| CN202634790U (en) * | 2012-05-03 | 2012-12-26 | 常州润泽光能科技有限公司 | LED-lamp isolation driving power supply |
| CN103025033B (en) * | 2013-01-11 | 2015-01-28 | 淮南市矿用电器设备有限责任公司 | Universal mining LED lamp driver |
| CN204291498U (en) * | 2014-12-12 | 2015-04-22 | 上海能照光电科技有限公司 | A kind of isolated form LED drive circuit based on transformer |
-
2015
- 2015-07-14 CN CN201510413040.3A patent/CN104994654B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104994654A (en) | 2015-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101562929B (en) | Isolated driving power for high-power light emitting diode | |
| CN101742784B (en) | LED lamp and drive circuit thereof | |
| CN104093252B (en) | A kind of without stroboscopic non-isolation type constant current driver circuit for LED | |
| CN101527983B (en) | White-light LED illumination driving circuit on basis of current-type charge pump | |
| CN201813599U (en) | LED (Light-Emitting Diode) dimmer power | |
| CN104093253B (en) | A kind of without stroboscopic isolated form constant current driver circuit for LED | |
| CN102014557A (en) | LED dimming power supply | |
| CN102752929A (en) | High-power factor LED (light-emitting diode) driving circuit supporting silicon controlled rectifier dimming | |
| CN103458557A (en) | LED drive control circuit and LED lamp | |
| CN102404904B (en) | Control device of solar street lamp | |
| CN102833902B (en) | Booster type constant current driver circuit for LED | |
| CN104968070B (en) | A kind of LED drive circuit | |
| CN110798927A (en) | LED drive circuit based on T-shaped lamp tube | |
| CN202076931U (en) | Non-electrolysis long-life stable-voltage constant current driving power supply | |
| CN203734894U (en) | LED drive circuit | |
| CN204518147U (en) | A kind of LED drive circuit | |
| CN204721217U (en) | Switching power circuit and electronic equipment | |
| CN204652745U (en) | A kind of constant current driver circuit for LED | |
| CN104994654B (en) | A kind of LED drive circuit | |
| CN201937914U (en) | Light-emitting diode (LED) drive circuit | |
| CN104735837A (en) | LED street lamp power supply without power frequency ripples and with APFC function | |
| CN211509366U (en) | LED drive circuit based on T-shaped lamp tube | |
| CN202679708U (en) | LED (light emitting diode) driving circuit | |
| CN208623943U (en) | A kind of LED drive circuit | |
| CN201601859U (en) | Non-isolated LED driving circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190116 Address after: 213000 Zhuangcun, Hengshanqiao Town, Wujin District, Changzhou City, Jiangsu Province Patentee after: CHANGZHOU GARDEN LIGHTING TECHNOLOGY CO.,LTD. Address before: 224051 middle road of hope Avenue, Yancheng City, Jiangsu Province, No. 1 Patentee before: YANCHENG INSTITUTE OF TECHNOLOGY |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: LED driving circuit Effective date of registration: 20210927 Granted publication date: 20180313 Pledgee: China Construction Bank Corporation Changzhou Economic Development Zone sub branch Pledgor: CHANGZHOU GARDEN LIGHTING TECHNOLOGY Co.,Ltd. Registration number: Y2021980009957 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20221226 Granted publication date: 20180313 Pledgee: China Construction Bank Corporation Changzhou Economic Development Zone sub branch Pledgor: CHANGZHOU GARDEN LIGHTING TECHNOLOGY CO.,LTD. Registration number: Y2021980009957 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A kind of LED driving circuit Effective date of registration: 20221227 Granted publication date: 20180313 Pledgee: China Construction Bank Corporation Changzhou Economic Development Zone sub branch Pledgor: CHANGZHOU GARDEN LIGHTING TECHNOLOGY CO.,LTD. Registration number: Y2022980029137 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |