CN201928483U - Constant-current drive circuit for lighting LED - Google Patents
Constant-current drive circuit for lighting LED Download PDFInfo
- Publication number
- CN201928483U CN201928483U CN2010206445557U CN201020644555U CN201928483U CN 201928483 U CN201928483 U CN 201928483U CN 2010206445557 U CN2010206445557 U CN 2010206445557U CN 201020644555 U CN201020644555 U CN 201020644555U CN 201928483 U CN201928483 U CN 201928483U
- Authority
- CN
- China
- Prior art keywords
- resistance
- capacitor
- diode
- pin
- circuit
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model relates to a constant-current drive circuit for a lighting LED, comprising a constant-current control system. As a power factor correcting circuit which can correct the input current is arranged at the output end of the constant-current control system, the power factor can be effectively improved. As an EMI (electromagnetic interference) filter circuit capable of performing both differential mode filtering and common mode filtering is arranged at the output end of the power factor correcting circuit, both the EMI filtering property and the current stability are effectively improved. As a lightning prevention circuit which can prevent surge and lightening and protect the circuit against damage of external surge and lightening is arranged at the output end of the EMI filter circuit, both the current stability of the circuit and the dimming property are effectively improved. As in the constant-current control system, a BP2808 chip adopts a unique method of common-gate source electrode to drive a power MOSFET (Metal-Oxide -Semiconductor Field Effect Transistor), the working current of a chip module U1 is very low, meanwhile, the electrical energy wasted by a switch of an MOSFET tube is supplied to the chip through a feeding diode, and the service efficiency of the system is effectively improved.
Description
[technical field]
The utility model relates to a kind of circuit, specifically is meant a kind of illumination LED constant-current drive circuit that is used for lighting field.
[background technology]
Along with society constantly advances and continues, it is more and more higher to the requirement of lighting technology to be accompanied by each industry of society.Existing then is that main illuminations can't satisfy demands of social development with incandescent lamp and fluorescent lamp.Because the cost performance of existing illuminations is low, fail safe is low, quality is unstable, installation and maintenance are complicated and pollute surrounding environment easily, makes and to be satisfied with fields such as greenery patches lighting field, highway lighting field, advertising lamp box lighting field, city moulding Landscape Lighting and lighting of home system.In order to solve the problems of the technologies described above, the LED Lighting Industry appears subsequently.One of core technology that described LED lamp drive circuit is the LED Lighting Industry, existing most LED lamp drive circuit all adopts the Switching Power Supply mode to realize.Described Switching Power Supply mainly is oppositely to recover and produce huge electromagnetic interference source with the high frequency break-make of switching device and output rectifier diode, this electromagnetic interference source disturbs leading of proximity switches device disconnected by the conduction of space radiation and power line, realizes the conducting or the disconnection of LED lamp drive circuit.But, in the conducting or disconnection process of LED lamp drive circuit, described Switching Power Supply is except interference power switching tube and high-frequency rectification diode, also can produce the pulse transformer and the filter inductance device that disturb other in the radiated interference source, cause the power factor correction performance of entire circuit low, current stability is poor, dimming behavior is low and the EMI filtering performance is low.
[utility model content]
Technical purpose of the present utility model is to provide a kind of illumination LED constant-current drive circuit that improves the power factor correction performance, improves dimming behavior, improves the EMI filtering performance, improves current stability and improve system's service efficiency for the problem that solves above-mentioned prior art existence.
In order to realize above-mentioned technical problem, the utility model provides a kind of illumination LED constant-current drive circuit, it comprises Constant Current Control System, the Constant Current Control System output is provided with the circuit of power factor correction of scalable power factor, this circuit of power factor correction output is provided with the EMI filter circuit that can suppress filtering, and this EMI filter circuit output is provided with and is used to prevent surge and anti-lightning strike lightning protection circuit.
According to above-mentioned major technique feature, described lightning protection circuit comprises the piezo-resistance VR1 that is connected in fuse F1 one end, is connected in the thermistor TR1 of piezo-resistance VR1 one end.
According to above-mentioned major technique feature, described EMI filter circuit comprises the capacitor C X1 that is used to carry out common mode filtering that is connected between piezo-resistance VR1 and the thermistor TR1, be connected in the electric capacity LF1 at capacitor C X1 two ends, the capacitor C X2 that is used to carry out differential mode filtering that is connected in the insurance transformer LF2 at electric capacity LF1 two ends jointly and is connected in insurance transformer LF2 two ends; Described inductance L F1 is made up of two inductance L 1 and inductance L 2.
According to above-mentioned major technique feature, described circuit of power factor correction comprises the diode D1 that is connected in capacitor C X1 two ends, diode D2, diode D3, the diode D4 that is connected in parallel, be connected in the capacitor C 1 on the total end of diode D1, the diode D2, diode D3 and the diode D4 that are connected in parallel, be connected in resistance R 1, capacitor C 7 and the diode D8 at capacitor C 1 two ends, diode D8 one end that capacitor C 7 and resistance R 1 are connected in parallel is connected between resistance R 1 and the capacitor C 7, and the diode D8 other end is connected on the capacitor C 7; Be connected in the diode D7 on the total end of resistance R 1, capacitor C 7 and diode D8, be connected in the resistance R 12 of diode D7 output, be connected in resistance R 2, capacitor C 8 and the diode D6 of resistance R 12 other ends, described resistance R 2 is connected in parallel with capacitor C 8, described diode D6 one end is connected in resistance R 2 and capacitor C 8 total links, and the other end of diode D6 is connected in resistance R 1 and capacitor C 7 total links.
According to above-mentioned major technique feature, described Constant Current Control System comprises chip module U1; Be arranged at pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 and pin 8 on the chip module U1 respectively; Be connected in the resistance R 8 on the pin 7, this pin 7 is connected with circuit of power factor correction; Be connected in resistance R 9, resistance R 10, resistance R 11 on the pin 6; Be connected in the voltage stabilizing circuit on the pin 3; Be connected in the MOSFET that is connected with the voltage stabilizing circuit pipe Q1 on the pin 4, be connected with resistance R 3, diode D5 respectively on this MOSFET pipe Q1, described resistance R 3 is connected in parallel with diode D5; Be connected in inductance L 4 and diode D9 on the MOSFET pipe Q1 other end; Be connected in the inductance L 5 of inductance L 4 other ends; Be arranged at the resistance R that is connected in series 4, resistance R 6 between inductance L 5 and the pin 2; Be connected in the capacitor C 5 between inductance L 5 and the diode D9; Be connected in the inductance L 3 of capacitor C 5 one ends; Be connected in capacitor C 6 and resistance R 7 on inductance 3 one ends, described capacitor C 6 is connected in parallel with resistance R 7.
According to above-mentioned major technique feature, described voltage stabilizing circuit comprises the voltage stabilizing didoe ZD1 that connects on the pin 3, be connected in parallel in the capacitor C that is connected in parallel 2 and the resistance R 13 at voltage stabilizing didoe ZD1 two ends, the capacitor C 4 that is connected in the resistance R 5 of voltage stabilizing didoe ZD1 output and is connected in this resistance other end.
According to above-mentioned major technique feature, described chip module U1 is made of the BP2808 chip.
Useful technique effect of the present utility model: because of the Constant Current Control System output is provided with circuit of power factor correction, this circuit of power factor correction can be proofreaied and correct input current, reaches effective power factor of improving.The EMI filter circuit that is provided with because of this circuit of power factor correction output again, this EMI filter circuit can carry out differential mode filtering and common mode filtering, effectively can improve the EMI filtering performance, improve current stability, because of being provided with, this EMI filter circuit output is used to prevent surge and anti-lightning strike lightning protection circuit again, this lightning protection circuit can prevent extraneous surge and anti-lightning strike destruction circuit, effectively improves circuital current stability and dimming behavior.In addition, because of adopting the BP2808 chip, Constant Current Control System constitutes again, this BP2808 chip adopts the method for unique common grid (source electrode) driving power MOSFET, make that the operating current of chip module U1 is very low, simultaneously, also give chip power supply the electric energy of the switching loss of MOSFET pipe by the feed diode, effectively reach the service efficiency of raising system.
Below in conjunction with drawings and Examples, the technical solution of the utility model is described in further detail.
[description of drawings]
Fig. 1 is the schematic diagram of the utility model illumination LED constant-current drive circuit.
[embodiment]
Please refer to shown in Figure 1ly, below in conjunction with specific embodiment a kind of illumination LED constant-current drive circuit is described, it comprises Constant Current Control System, circuit of power factor correction, EMI filter circuit and lightning protection circuit.
Described lightning protection circuit comprises the piezo-resistance VR1 that is connected in fuse F1 one end, is connected in the thermistor TR1 of piezo-resistance VR1 one end.This lightning protection circuit can effectively prevent the purpose of power surge and lightning prevention circuit.
Described EMI filter circuit comprises the capacitor C X1 that is used to carry out common mode filtering that is connected between piezo-resistance VR1 and the thermistor TR1, be connected in the electric capacity LF1 at capacitor C X1 two ends, the capacitor C X2 that is used to carry out differential mode filtering that is connected in the insurance transformer LF2 at electric capacity LF1 two ends jointly and is connected in insurance transformer LF2 two ends; Described inductance L F1 is made up of two inductance L 1 and inductance L 2.Described capacitor C X1, capacitor C X2 are used to carry out differential mode filtering, and inductance L F1 is used to carry out common mode filtering.
Described circuit of power factor correction comprises the diode D1 that is connected in capacitor C X1 two ends, diode D2, diode D3, the diode D4 that is connected in parallel, be connected in the capacitor C 1 on the total end of diode D1, the diode D2, diode D3 and the diode D4 that are connected in parallel, be connected in resistance R 1, capacitor C 7 and the diode D8 at capacitor C 1 two ends, diode D8 one end that capacitor C 7 and resistance R 1 are connected in parallel is connected between resistance R 1 and the capacitor C 7, and the diode D8 other end is connected on the capacitor C 7; Be connected in the diode D7 on the total end of resistance R 1, capacitor C 7 and diode D8, be connected in the resistance R 12 of diode D7 output, be connected in resistance R 2, capacitor C 8 and the diode D6 of resistance R 12 other ends, described resistance R 2 is connected in parallel with capacitor C 8, described diode D6 one end is connected in resistance R 2 and capacitor C 8 total links, and the other end of diode D6 is connected in resistance R 1 and capacitor C 7 total links.This circuit is proofreaied and correct the circuit input current to a certain extent, can effectively improve power factor.
Described Constant Current Control System comprises chip module U1; Be arranged at pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 and pin 8 on the chip module U1 respectively; Be connected in the resistance R 8 on the pin 7, this pin 7 is connected with circuit of power factor correction; Be connected in resistance R 9, resistance R 10, resistance R 11 on the pin 6; Be connected in the voltage stabilizing circuit on the pin 3; Be connected in the MOSFET that is connected with the voltage stabilizing circuit pipe Q1 on the pin 4, be connected with resistance R 3, diode D5 respectively on this MOSFET pipe Q1, described resistance R 3 is connected in parallel with diode D5; Be connected in inductance L 4 and diode D9 on the MOSFET pipe Q1 other end; Be connected in the inductance L 5 of inductance L 4 other ends; Be arranged at the resistance R that is connected in series 4, resistance R 6 between inductance L 5 and the pin 2; Be connected in the capacitor C 5 between inductance L 5 and the diode D9; Be connected in the inductance L 3 of capacitor C 5 one ends; Be connected in capacitor C 6 and resistance R 7 on inductance 3 one ends, described capacitor C 6 is connected in parallel with resistance R 7.
Described voltage stabilizing circuit comprises the voltage stabilizing didoe ZD1 that connects on the pin 3, be connected in parallel in the capacitor C that is connected in parallel 2 and the resistance R 13 at voltage stabilizing didoe ZD1 two ends, the capacitor C 4 that is connected in the resistance R 5 of voltage stabilizing didoe ZD1 output and is connected in this resistance other end.Described chip module U1 is made of the BP2808 chip.
Be connected with the EMI filter circuit on the described lightning protection circuit output, this EMI filter circuit output is connected with circuit of power factor correction, is connected with Constant Current Control System on this circuit of power factor correction output.
Based on above-mentioned; described Constant Current Control System has overcurrent protection, overvoltage protection, temperature protection, open-circuit-protection, short-circuit protection function; as sampling resistor startup and feedforward compensation resistance is respectively resistance R 4, resistance R 5; the MOSFET pipe Q1 turn-off time is provided with resistance R 8; each cycle begins; MOSFET pipe Q1 opens up to electric current and rises to the inductance peak current, and at this moment MOSFET pipe Q1 turn-offs, and the turn-off time is by Toff=4 * 10
5* (R8).Current sampling resistor is resistance R 9, resistance R 10, resistance R 11, the turn-off time of the electric current root a tree name inductance L 4 of illumination LED constant-current drive circuit, the peak current of inductance L 5 and MOSFET pipe Q1 is decided, pass through the sampling of resistance R 9, resistance R 10, resistance R 11 simultaneously, come the variation of the reference voltage and the chip module U1 supply power voltage of decision circuitry, the highest in order to reach system effectiveness, the BP2808 chip adopts the method for unique common grid (source electrode) driving power MOSFET, makes that the operating current of chip is very low.Give chip power supply the electric energy of switch mosfet loss by the feed diode simultaneously, improved the efficient of system so greatly.
Alternating current is through fuse F1; fuse F1 gives circuit with effective protection when big surge current; and by thermistor TR1 reduction inrush current; alternating current is through capacitor C X1; capacitor C X2 carries out differential mode filtering; capacitor C X1; capacitor C X2 can filter low frequency signal; filter common mode interference signal through common mode inductance LF1; resistance R 1; resistance R 2 is as capacitor C 7; capacitor C 8 discharge resistances and the effect of playing balanced voltage; through alternating current ingoing power factor (PFC) correcting circuit after filtering and the rectification; when input voltage is higher than capacitor C 7; during capacitor C 8 voltages; electric current charges to electric capacity and to electric; when voltage is lower than capacitor C 7; during capacitor C 8 voltages; capacitor C 7; capacitor C 8 parallel connections power to the load; in design; need assurance Vbulk voltage is in office, and when section is reserved 25% surplus usually all greater than output voltage V out.Therefore, described illumination LED constant-current drive circuit has power factor (PFC) correction, EMI, constant current, dimming characteristic.The utility model is owing to adopted the BP2808 chip simultaneously; can save a large amount of peripheral circuits; have overheat protector, overcurrent protection, overvoltage protection, open-circuit-protection, short-circuit protection simultaneously; be fit to very much require the requirement of system effectiveness height and good stability; the advantage that its cost is low, volume is little simultaneously is fit to produce in batches.
In sum, because of the Constant Current Control System output is provided with circuit of power factor correction, this circuit of power factor correction can be proofreaied and correct input current, reaches effective power factor of improving.The EMI filter circuit that is provided with because of this circuit of power factor correction output again, this EMI filter circuit can carry out differential mode filtering and common mode filtering, effectively can improve the EMI filtering performance, improve current stability, because of being provided with, this EMI filter circuit output is used to prevent surge and anti-lightning strike lightning protection circuit again, this lightning protection circuit can prevent extraneous surge and anti-lightning strike destruction circuit, effectively improves circuital current stability and dimming behavior.In addition, because of adopting the BP2808 chip, Constant Current Control System constitutes again, this BP2808 chip adopts the method for unique common grid (source electrode) driving power MOSFET, make that the operating current of chip module U1 is very low, simultaneously, also give chip power supply the electric energy of the switching loss of MOSFET pipe by the feed diode, effectively reach the service efficiency of raising system.
Claims (7)
1. illumination LED constant-current drive circuit, it comprises Constant Current Control System, it is characterized in that: the Constant Current Control System output is provided with the circuit of power factor correction of scalable power factor, this circuit of power factor correction output is provided with the EMI filter circuit that can suppress filtering, and this EMI filter circuit output is provided with and is used to prevent surge and anti-lightning strike lightning protection circuit.
2. illumination LED constant-current drive circuit according to claim 1 is characterized in that: described lightning protection circuit comprises the piezo-resistance VR1 that is connected in fuse F1 one end, is connected in the thermistor TR1 of piezo-resistance VR1 one end.
3. illumination LED constant-current drive circuit according to claim 1, it is characterized in that: described EMI filter circuit comprises the capacitor C X1 that is used to carry out common mode filtering that is connected between piezo-resistance VR1 and the thermistor TR1, be connected in the electric capacity LF1 at capacitor C X1 two ends, the capacitor C X2 that is used to carry out differential mode filtering that is connected in the insurance transformer LF2 at electric capacity LF1 two ends jointly and is connected in insurance transformer LF2 two ends; Described inductance L F1 is made up of two inductance L 1 and inductance L 2.
4. illumination LED constant-current drive circuit according to claim 1, it is characterized in that: described circuit of power factor correction comprises the diode D1 that is connected in capacitor C X1 two ends that is connected in parallel, diode D2, diode D3, diode D4, be connected in the diode D1 that is connected in parallel, diode D2, capacitor C 1 on the total end of diode D3 and diode D4, be connected in the resistance R 1 at capacitor C 1 two ends, capacitor C 7 and diode D8, diode D8 one end that capacitor C 7 and resistance R 1 are connected in parallel is connected between resistance R 1 and the capacitor C 7, and the diode D8 other end is connected on the capacitor C 7; Be connected in the diode D7 on the total end of resistance R 1, capacitor C 7 and diode D8, be connected in the resistance R 12 of diode D7 output, be connected in resistance R 2, capacitor C 8 and the diode D6 of resistance R 12 other ends, described resistance R 2 is connected in parallel with capacitor C 8, described diode D6 one end is connected in resistance R 2 and capacitor C 8 total links, and the other end of diode D6 is connected in resistance R 1 and capacitor C 7 total links.
5. illumination LED constant-current drive circuit according to claim 1 is characterized in that: described Constant Current Control System comprises chip module U1; Be arranged at pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 and pin 8 on the chip module U1 respectively; Be connected in the resistance R 8 on the pin 7, this pin 7 is connected with circuit of power factor correction; Be connected in resistance R 9, resistance R 10, resistance R 11 on the pin 6; Be connected in the voltage stabilizing circuit on the pin 3; Be connected in the MOSFET that is connected with the voltage stabilizing circuit pipe Q1 on the pin 4, be connected with resistance R 3, diode D5 respectively on this MOSFET pipe Q1, described resistance R 3 is connected in parallel with diode D5; Be connected in inductance L 4 and diode D9 on the MOSFET pipe Q1 other end; Be connected in the inductance L 5 of inductance L 4 other ends; Be arranged at the resistance R that is connected in series 4, resistance R 6 between inductance L 5 and the pin 2; Be connected in the capacitor C 5 between inductance L 5 and the diode D9; Be connected in the inductance L 3 of capacitor C 5 one ends; Be connected in capacitor C 6 and resistance R 7 on inductance 3 one ends, described capacitor C 6 is connected in parallel with resistance R 7.
6. illumination LED constant-current drive circuit according to claim 5, it is characterized in that: described voltage stabilizing circuit comprises the voltage stabilizing didoe ZD1 that connects on the pin 3, be connected in parallel in the capacitor C that is connected in parallel 2 and the resistance R 13 at voltage stabilizing didoe ZD1 two ends, the capacitor C 4 that is connected in the resistance R 5 of voltage stabilizing didoe ZD1 output and is connected in this resistance other end.
7. illumination LED constant-current drive circuit according to claim 5 is characterized in that: described chip module U1 is made of the BP2808 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206445557U CN201928483U (en) | 2010-12-06 | 2010-12-06 | Constant-current drive circuit for lighting LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206445557U CN201928483U (en) | 2010-12-06 | 2010-12-06 | Constant-current drive circuit for lighting LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201928483U true CN201928483U (en) | 2011-08-10 |
Family
ID=44432316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206445557U Expired - Fee Related CN201928483U (en) | 2010-12-06 | 2010-12-06 | Constant-current drive circuit for lighting LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201928483U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184110A (en) * | 2013-05-28 | 2014-12-03 | 海洋王（东莞）照明科技有限公司 | Overvoltage protection circuit |
| WO2023060411A1 (en) * | 2021-10-11 | 2023-04-20 | 深圳技术大学 | Floodlight system for anechoic room or shielded room |
-
2010
- 2010-12-06 CN CN2010206445557U patent/CN201928483U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184110A (en) * | 2013-05-28 | 2014-12-03 | 海洋王（东莞）照明科技有限公司 | Overvoltage protection circuit |
| WO2023060411A1 (en) * | 2021-10-11 | 2023-04-20 | 深圳技术大学 | Floodlight system for anechoic room or shielded room |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101969727B (en) | High power LED driving power supply | |
| CN203352856U (en) | Capacitor step-down LED lighting power supply with open circuit protection | |
| CN103841702A (en) | LED drive circuit and LED drive method | |
| CN102438377A (en) | LED (Light Emitting Diode) constant-current driving circuit with high power factor | |
| CN201599589U (en) | LED fluorescent lamp | |
| CN203039971U (en) | Novel lamp drive circuit | |
| CN101841955A (en) | General illumination LED drive circuit | |
| CN201928483U (en) | Constant-current drive circuit for lighting LED | |
| CN103220868A (en) | High-power light emitting diode (LED) switching power supply | |
| CN201210761Y (en) | Road lamp controller | |
| CN202435665U (en) | LED constant-current driving circuit with high power factor | |
| CN201813587U (en) | Universal lighting LED driving circuit | |
| CN203734880U (en) | High voltage integration AC LED multistage linear drive device | |
| CN204145795U (en) | Have APFC function without working frequency ripple wave LED streetlamp power source | |
| CN201830527U (en) | High-power LED (light emitting diode) driving power supply | |
| CN211509366U (en) | LED drive circuit based on T-shaped lamp tube | |
| CN104735837A (en) | LED street lamp power supply without power frequency ripples and with APFC function | |
| CN201213326Y (en) | Cold-starting power circuit for electrodeless lamp | |
| CN202818746U (en) | Electronic energy saving lamp high-power factor circuit | |
| CN202551464U (en) | Wide-voltage LED lamp control circuit | |
| CN201919225U (en) | High-efficiency high-power-factor LED lamp | |
| CN202190435U (en) | Novel LED street lamp driving power supply | |
| CN200997705Y (en) | High-brightness LED illuminating system | |
| CN103634991A (en) | High-voltage integrated alternating-current LED multistage linear drive device | |
| CN204350406U (en) | A kind of isolation drive power supply of LED illumination lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen China Energy South Power Equipment Co., Ltd. Assignor: Tang Deming Contract record no.: 2012440020032 Denomination of utility model: LED constant current driving circuit capable of dimming automatically Granted publication date: 20110810 License type: Exclusive License Record date: 20120319 |
|
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN CHINA ENERGY SOUTH POWER EQUIPMENT CO., L Free format text: FORMER OWNER: TANG DEMING Effective date: 20130702 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130702 Address after: Futian District King Road Shenzhen city Guangdong province 518034 Runfeng Park Hui Xiangge room 2401 Patentee after: Shenzhen China Energy South Power Equipment Co., Ltd. Address before: 518034, No. 1, No. 709, Li Li Garden, Lianhua West Road, Shenzhen, Guangdong, Futian District Patentee before: Tang Deming |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20191206 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |