CN103220837A - Light-emitting diode (LED) continuous lighting device - Google Patents

Light-emitting diode (LED) continuous lighting device Download PDF

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Publication number
CN103220837A
CN103220837A CN201310139883XA CN201310139883A CN103220837A CN 103220837 A CN103220837 A CN 103220837A CN 201310139883X A CN201310139883X A CN 201310139883XA CN 201310139883 A CN201310139883 A CN 201310139883A CN 103220837 A CN103220837 A CN 103220837A
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capacitor
integrated circuit
pin
resistance
circuit
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CN201310139883XA
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CN103220837B (en
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王立华
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Shandong University of Science and Technology
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Shandong University of Science and Technology
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Priority to CN201210525035.8 priority
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Priority to CN201310139883.XA priority patent/CN103220837B/en
Publication of CN103220837A publication Critical patent/CN103220837A/en
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Abstract

The invention relates to a light-emitting diode (LED) continuous lighting device which comprises a switching power circuit, a charging circuit, a boosted circuit, a lithium battery, an LED constant current driving circuit and an LED light. When external power grid voltages are normal, the LED driving circuit is directly driven by the external power grid voltages, the lithium battery is charged by the charging circuit alone, and the fact that the lithium battery can complete whole charging circulation is guaranteed. When the external power grid voltages are interrupted, voltages of the lithium battery are instantly switched to the boosted circuit, the LED driving circuit is driven by the boosted voltages of the lithium battery, and efficiency can reach over 90%. Due to the facts that the energy density of the lithium battery is quite large, and the integration level of chips which form the circuits is high, the LED continuous lighting device can be designed to be small on the whole. Compared with other illumination lamps, an LED is powered by a direct current electric source, the illumination lamp can save electricity by over 90% compared with an electric incandescent lamp, and the service life of the LED lamp can reach up to 100,000 hours. The LED lamp is used in a construction field, electric power can be saved, and lighting quality can be guaranteed.

Description

A kind of LED continuous illumination device
Technical field
The present invention relates to a kind of LED lighting device, specifically, relate to a kind of LED continuous illumination device that is applicable to the construction site, belong to electronic technology field.
Background technology
The construction site is scene such as tunnel, underground works particularly, during construction illuminating lamp is had very high requirement, not only requires illuminating lamp that higher brightness and reliability are arranged, and must guarantee that also illumination is uninterrupted.At present, the traditional lighting lamp that the construction site is commonly used all by the AC network power supply, owing to the job site complexity, unavoidably power outage can occur as incandescent lamp, fluorescent lamp, high-pressure sodium lamp etc.In order to ensure the building site continuous illumination, the Emergency Lighting Supply of being made up of rectifier, storage battery and inverter etc. is installed usually, when the electrical network normal power supply, alternating current charges a battery through rectifier, when electrical network interrupts, storage battery is powered to lighting by inverter, and cost height, the volume of this continuous illumination system are big, simultaneously through repeatedly conversion loss power is also bigger.
Summary of the invention
The problem to be solved in the present invention is at above deficiency, and a kind of LED continuous illumination device is provided, and this lighting device can be realized uninterrupted power supply, and the efficient height.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of LED continuous illumination device is characterized in that: described lighting device comprises switching power circuit, charging circuit, booster circuit, lithium battery, LED constant-current drive circuit and the LED lamp of electrical connection;
Described booster circuit comprises integrated circuit (IC) 4, resistance R 8, resistance R 9, resistance R 10, filter capacitor C14, capacitor C 15, capacitor C 16, capacitor C 17, inductance L 4 and Schottky diode DZ3;
1 pin of described integrated circuit (IC) 4 connects the output of charging circuit, the end of filter capacitor C14 and an end of inductance L 4, the other end ground connection of filter capacitor C14,2 pin of integrated circuit (IC) 4 connect the other end of inductance L 4 and the positive pole of Schottky diode DZ3,3 pin of integrated circuit (IC) 4,4 pin ground connection, the end of 6 pin connecting resistance R9 of integrated circuit (IC) 4 and an end of resistance R 10, the other end ground connection of resistance R 10, one end of another termination capacitor C 17 of resistance R 9, the output end vo ut2 of the negative electrode of Schottky diode DZ3 and booster circuit, the other end ground connection of capacitor C 17, the end of 7 pin connecting resistance R8 of integrated circuit (IC) 4 and the end of ground capacity C15, the other end of resistance R 8 connects an end of capacitor C 16, the other end ground connection of capacitor C 16,8 pin ground connection of integrated circuit (IC) 4.
A kind of prioritization scheme, described LED constant-current drive circuit comprises integrated circuit (IC) 5, resistance R 11, resistance R 12, capacitor C 18, capacitor C 19, capacitor C 20, capacitor C 21, capacitor C 22, inductance L 5, diode D4 and Schottky diode DZ4;
2 pin of described integrated circuit (IC) 5 connect an end of inductance L 5, one end of the negative pole end of Schottky diode DZ4 and capacitor C 20, the other end of capacitor C 20 connects 3 pin of integrated circuit (IC) 5, the positive terminal ground connection of Schottky diode DZ4, the other end of inductance L 5 connects 5 pin of integrated circuit (IC) 5, one end of the positive pole of LED lamp and capacitor C 22, the negative pole of LED lamp connects the other end of capacitor C 22,6 pin of integrated circuit (IC) 5 and an end of resistance R 12, the other end ground connection of resistance R 12,7 pin ground connection of integrated circuit (IC) 5,9 pin of integrated circuit (IC) 5 connect an end of capacitor C 19, the other end ground connection of capacitor C 19, the end of 10 pin connecting resistance R11 of integrated circuit (IC) 5,12 pin of another termination integrated circuit (IC) 5 of resistance R 11 and 13 pin of IC5, and be connected with the negative pole of diode D4,11 pin of integrated circuit (IC) 5 connect an end of capacitor C 11, the other end ground connection of capacitor C 11.
Another kind of prioritization scheme, described charging circuit comprises integrated circuit (IC) 3, resistance R 5, resistance R 6, resistance R 7, capacitor C 10, capacitor C 11, capacitor C 12, capacitor C 13, voltage-stabiliser tube DZ2, inductance L 3, negative temperature coefficient resister NTC, P channel MOS field effect transistor M1, P channel MOS field effect transistor M2;
1 pin of integrated circuit (IC) 3 is through the capacitor C 11 and resistance R 6 ground connection of series connection, 2 pin of integrated circuit (IC) 3 are power pins, this pin is connected with the direct voltage Vout1 of switching power circuit output by metal-oxide-semiconductor field effect transistor M2,3 pin of integrated circuit (IC) 3 connect the grid of metal-oxide-semiconductor field effect transistor M1, the source electrode of metal-oxide-semiconductor field effect transistor M1 is connected with 2 pin of integrated circuit (IC) 3, the drain electrode of metal-oxide-semiconductor field effect transistor M1 is connected with an end of inductance L 3 and the negative pole end of voltage-stabiliser tube DZ2,7 pin of another termination integrated circuit (IC) 3 of inductance L 3, the positive terminal ground connection of voltage-stabiliser tube DZ2,4 pin ground connection of integrated circuit (IC) 3,5 pin of integrated circuit (IC) 3 connect an end of metal-oxide-semiconductor field effect transistor M2 grid and resistance R 5, the output of another termination switching power circuit of resistance R 5, the end of 6 pin connecting resistance R7 of integrated circuit (IC) 3 and an end of capacitor C 12 and BAT end, the BAT end directly links to each other with the positive pole of lithium battery, the other end of resistance R 7 is connected with 7 pin of integrated circuit (IC) 3, the other end ground connection of capacitor C 12,8 pin of integrated circuit (IC) 3 are through negative temperature coefficient resister NTC ground connection.
The present invention adopts technique scheme, have the following advantages: since this LED continuous illumination device to have adopted be the lithium battery booster circuit of core with LT1961, be the charging circuit of core with the LTC4002ES8-8.4 chip, can adapt to the bigger environment of input voltage change.When outside electric power network voltage just often, led drive circuit is directly by the outside electric power network driven, charging circuit is a lithium cell charging separately, has guaranteed that lithium battery finishes complete charging cycle.After the outside electric power network voltage interruption, lithium battery voltage moment switches to booster circuit, and through the rear drive of boosting, efficient can reach more than 90% led drive circuit by lithium battery voltage.Because the energy density of lithium battery is bigger, the chip integration height of forming circuit in addition, the whole design of this LED continuous illumination device can be done very for a short time.Compare with other lighting, LED is by DC power supply, and this illuminating lamp economizes on electricity more than 90% than incandescent lamp, and the life-span of LED lamp can reach 100,000 hours.The construction site adopts the LED lamp not only can save electric energy, but also can guarantee lighting quality.
The invention will be further described below in conjunction with drawings and Examples.
Description of drawings
Accompanying drawing 1 is the circuit block diagram of LED continuous illumination device in the embodiment of the invention;
Accompanying drawing 2 is the schematic diagram of switching power circuit in the embodiment of the invention;
Accompanying drawing 3 is the schematic diagram of charging circuit in the embodiment of the invention;
Accompanying drawing 4 is the schematic diagram of booster circuit in the embodiment of the invention;
Accompanying drawing 5 is the LED constant-current drive circuit schematic diagram in the embodiment of the invention;
Among the figure,
The 1-switching power circuit, 2-charging circuit, 3-booster circuit, 4-LED constant-current drive circuit.
Embodiment
Embodiment, as shown in Figure 1, a kind of LED continuous illumination device comprises switching power circuit 1, charging circuit 2, booster circuit 3, lithium battery, LED constant-current drive circuit 4 and the LED lamp of electrical connection.
As shown in Figure 2, switching power circuit 1 comprises integrated circuit (IC) 1, integrated circuit (IC) 2, resistance R 1, resistance R 2, resistance R 3, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C 6, capacitor C 7, capacitor C 8, capacitor C 9, reactor L1, inductance L 2, protective tube F1, rectifier bridge BR1, switch transformer T1, voltage-stabiliser tube DZ1, diode D1, diode D2, diode D3, variable resistor Rw and photoelectrical coupler OC, integrated circuit (IC) 1 is three end PWM switch chips, its model is TOP210PFI, integrated circuit (IC) 2 is a three terminal regulator, and its model is TL431CLP.
The alternating current 220V input voltage is through protective tube F1, capacitor C 1, reactor L1 filtering, after the rectifier bridge BR1 rectification, obtain dc high voltage, this direct voltage is added to an end of switch transformer T1 primary coil, and the other end of switch transformer T1 primary coil is added to 5 pin of three end PWM switch chips; Voltage-stabiliser tube DZ1 and diode D1 form clamp circuit, and the pulse front edge peak voltage that switch transformer T1 leakage inductance is caused is restricted to safety value; The secondary voltage of switch transformer T1 after diode D2 rectification and capacitor C 3, capacitor C 5, inductance L 2 filtering, output 12V burning voltage Vout1.Reactor L1, capacitor C 1, capacitor C 8, capacitor C 9 are used for reducing the conduct radiation electric current, to reduce the radio frequency interference that Switching Power Supply produces.The feedback coil both end voltage of switch transformer T1 is through diode D3 rectification, and after resistance R 1, capacitor C 6 current limlitings, the filtering, 4 pin that are added to integrated circuit (IC) 1 are control end, and the voltage at capacitor C 6 two ends is adjusted by integrated circuit (IC) 1, so that regulated output voltage.The feedback voltage of switching power circuit 1 output is decided by the voltage stabilizing value of parallel voltage-stabilizing chip IC 2, the forward voltage drop of photoelectrical coupler OC and the pressure drop three sum on the resistance R 2.When output end voltage raises, because the voltage constant at integrated circuit (IC) 2 two ends, the input current of photoelectrical coupler OC increases, the output triode collector electrode c of photoelectrical coupler OC, the equivalent resistance between emitter e reduce, diode D3 conducting thereupon, the electric current of 4 pin of integrated circuit (IC) 1 increases, and the duty ratio of the pwm pulse of the 5 pin output of integrated circuit (IC) 1 reduces, output voltage V out1 reduces, and realizes the purpose of voltage stabilizing.
As shown in Figure 3, charging circuit 2 comprises integrated circuit (IC) 3, resistance R 5, resistance R 6, resistance R 7, capacitor C 10, capacitor C 11, capacitor C 12, capacitor C 13, voltage-stabiliser tube DZ2, inductance L 3, negative temperature coefficient resister NTC, P channel MOS field effect transistor M1, P channel MOS field effect transistor M2, and the model of integrated circuit (IC) 3 is LTC4002ES8-8.4.
1 pin of integrated circuit (IC) 3 is through the capacitor C 11 and resistance R 6 ground connection of series connection, 2 pin of integrated circuit (IC) 3 are power pins, this pin is connected with the direct voltage Vout1 of switching power circuit output by metal-oxide-semiconductor field effect transistor M2,3 pin of integrated circuit (IC) 3 connect the grid of metal-oxide-semiconductor field effect transistor M1, the source electrode of metal-oxide-semiconductor field effect transistor M1 is connected with 2 pin of integrated circuit (IC) 3, the drain electrode of metal-oxide-semiconductor field effect transistor M1 is connected with an end of inductance L 3 and the negative pole end of voltage-stabiliser tube DZ2,7 pin of another termination integrated circuit (IC) 3 of inductance L 3, the positive terminal ground connection of voltage-stabiliser tube DZ2,4 pin ground connection of integrated circuit (IC) 3,5 pin of integrated circuit (IC) 3 connect an end of metal-oxide-semiconductor field effect transistor M2 grid and resistance R 5, another termination switching power circuit output Vout1 of resistance R 5, the end of 6 pin connecting resistance R7 of integrated circuit (IC) 3 and an end of capacitor C 12 and BAT end, the BAT end directly links to each other with the positive pole of lithium battery, the other end of resistance R 7 is connected with 7 pin of integrated circuit (IC) 3, the other end ground connection of capacitor C 12,8 pin of integrated circuit (IC) 3 are through negative temperature coefficient resister NTC ground connection.
The charge mode of this charging circuit 2 is:
1: lithium battery forces down in 5V, enters 0.1 times and sets the charging of electric current triangular wave.
2: lithium battery voltage is higher than after the 5V, enters to set the electric current fast charge mode.
3: when lithium battery voltage reaches 8.4V, reach rated voltage, charging termination.
4: when 3 hours voltage of fast charge mode surpasses 8.1V yet, restart charging cycle and reach 8.4V until lithium battery voltage.
As shown in Figure 4, booster circuit 3 comprises integrated circuit (IC) 4, resistance R 8, resistance R 9, resistance R 10, filter capacitor C14, capacitor C 15, capacitor C 16, capacitor C 17, inductance L 4 and Schottky diode DZ3, and the model of integrated circuit (IC) 4 is LT1961.
1 pin of described integrated circuit (IC) 4 connects the output BAT end of charging circuit 2, the end of filter capacitor C14 and an end of inductance L 4, the other end ground connection of filter capacitor C14,2 pin of integrated circuit (IC) 4 connect the other end of inductance L 4 and the positive pole of Schottky diode DZ3,3 pin of integrated circuit (IC) 4,4 pin ground connection, the end of 6 pin connecting resistance R9 of integrated circuit (IC) 4 and an end of resistance R 10, the other end ground connection of resistance R 10, one end of another termination capacitor C 17 of resistance R 9, the output end vo ut2 of the negative electrode of Schottky diode DZ3 and booster circuit 3, the other end ground connection of capacitor C 17, the end of 7 pin connecting resistance R8 of integrated circuit (IC) 4 and the end of ground capacity C15, the other end of resistance R 8 connects an end of capacitor C 16, the other end ground connection of capacitor C 16,8 pin ground connection of integrated circuit (IC) 4.
The input voltage of booster circuit 3 is the output BAT terminal voltage 8.4V of charging circuit, obtains stable output voltage 12V after booster circuit boosts.
As shown in Figure 5, LED constant-current drive circuit 4 comprises integrated circuit (IC) 5, resistance R 11, resistance R 12, capacitor C 18, capacitor C 19, capacitor C 20, capacitor C 21, capacitor C 22, inductance L 5, diode D4, Schottky diode DZ4, and the model of integrated circuit (IC) 5 is LM3406.
2 pin of described integrated circuit (IC) 5 connect an end of inductance L 5, one end of the negative pole end of Schottky diode DZ4 and capacitor C 20, the other end of capacitor C 20 connects 3 pin of integrated circuit (IC) 5, the positive terminal ground connection of Schottky diode DZ4, the other end of inductance L 5 connects 5 pin of integrated circuit (IC) 5, one end of the positive pole of LED lamp and capacitor C 22, the negative pole of LED lamp connects the other end of capacitor C 22,6 pin of integrated circuit (IC) 5 and an end of resistance R 12, the other end ground connection of resistance R 12,7 pin ground connection of integrated circuit (IC) 5,9 pin of integrated circuit (IC) 5 connect an end of capacitor C 19, the other end ground connection of capacitor C 19, the end of 10 pin connecting resistance R11 of integrated circuit (IC) 5,12 pin of another termination integrated circuit (IC) 5 of resistance R 11 and 13 pin of IC5, and be connected with the negative pole of diode D4,11 pin of integrated circuit (IC) 5 connect an end of capacitor C 11, the other end ground connection of capacitor C 11.
The power supply of LED constant-current drive circuit 4 is input as the output Vout1 of switching power circuit 1 and the output Vout2 of lithium battery booster circuit 3, diode D4 has played the effect of input power source conversion: when mains supply just often, because Vout1 is 12V, the current potential between the diode D4 both positive and negative polarity is identical, so not conducting, LED constant-current drive circuit 4 is powered by Vout1, when mains supply interrupted, Vout1 was 0V, and Vout2 is 12V, diode D4 forward conduction, LED constant-current drive circuit 4 is powered by Vout2.The acp chip of LED constant-current drive circuit 4 is LM3406, and its input voltage range is 6V~42V, and the forward current that is up to 1.5A can be provided, and can drive 1~5 LED lamp.For the electric current of guaranteeing the LED lamp keeps constant, the LED lamp also need be installed the working temperature that the radiator with certain area could reduce the LED lamp, guarantees that the life-span of LED reached more than 50,000 hours.
It should be noted that at last: the above only is the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (3)

1. LED continuous illumination device, it is characterized in that: described lighting device comprises switching power circuit (1), charging circuit (2), booster circuit (3), lithium battery, LED constant-current drive circuit (4) and the LED lamp of electrical connection;
Described booster circuit (3) comprises integrated circuit (IC) 4, resistance R 8, resistance R 9, resistance R 10, filter capacitor C14, capacitor C 15, capacitor C 16, capacitor C 17, inductance L 4 and Schottky diode DZ3;
1 pin of described integrated circuit (IC) 4 connects the output of charging circuit (2), the end of filter capacitor C14 and an end of inductance L 4, the other end ground connection of filter capacitor C14,2 pin of integrated circuit (IC) 4 connect the other end of inductance L 4 and the positive pole of Schottky diode DZ3,3 pin of integrated circuit (IC) 4,4 pin ground connection, the end of 6 pin connecting resistance R9 of integrated circuit (IC) 4 and an end of resistance R 10, the other end ground connection of resistance R 10, one end of another termination capacitor C 17 of resistance R 9, the output end vo ut2 of the negative electrode of Schottky diode DZ3 and booster circuit (3), the other end ground connection of capacitor C 17, the end of 7 pin connecting resistance R8 of integrated circuit (IC) 4 and the end of ground capacity C15, the other end of resistance R 8 connects an end of capacitor C 16, the other end ground connection of capacitor C 16,8 pin ground connection of integrated circuit (IC) 4.
2. a kind of LED continuous illumination device as claimed in claim 1, it is characterized in that: described LED constant-current drive circuit (4) comprises integrated circuit (IC) 5, resistance R 11, resistance R 12, capacitor C 18, capacitor C 19, capacitor C 20, capacitor C 21, capacitor C 22, inductance L 5, diode D4 and Schottky diode DZ4;
2 pin of described integrated circuit (IC) 5 connect an end of inductance L 5, one end of the negative pole end of Schottky diode DZ4 and capacitor C 20, the other end of capacitor C 20 connects 3 pin of integrated circuit (IC) 5, the positive terminal ground connection of Schottky diode DZ4, the other end of inductance L 5 connects 5 pin of integrated circuit (IC) 5, one end of the positive pole of LED lamp and capacitor C 22, the negative pole of LED lamp connects the other end of capacitor C 22,6 pin of integrated circuit (IC) 5 and an end of resistance R 12, the other end ground connection of resistance R 12,7 pin ground connection of integrated circuit (IC) 5,9 pin of integrated circuit (IC) 5 connect an end of capacitor C 19, the other end ground connection of capacitor C 19, the end of 10 pin connecting resistance R11 of integrated circuit (IC) 5,12 pin of another termination integrated circuit (IC) 5 of resistance R 11 and 13 pin of IC5, and be connected with the negative pole of diode D4,11 pin of integrated circuit (IC) 5 connect an end of capacitor C 11, the other end ground connection of capacitor C 11.
3. a kind of LED continuous illumination device as claimed in claim 1 is characterized in that: described charging circuit (2) comprises integrated circuit (IC) 3, resistance R 5, resistance R 6, resistance R 7, capacitor C 10, capacitor C 11, capacitor C 12, capacitor C 13, voltage-stabiliser tube DZ2, inductance L 3, negative temperature coefficient resister NTC, P channel MOS field effect transistor M1, P channel MOS field effect transistor M2;
1 pin of integrated circuit (IC) 3 is through the capacitor C 11 and resistance R 6 ground connection of series connection, 2 pin of integrated circuit (IC) 3 are power pins, this pin is connected with the direct voltage Vout1 of switching power circuit (1) output by metal-oxide-semiconductor field effect transistor M2,3 pin of integrated circuit (IC) 3 connect the grid of metal-oxide-semiconductor field effect transistor M1, the source electrode of metal-oxide-semiconductor field effect transistor M1 is connected with 2 pin of integrated circuit (IC) 3, the drain electrode of metal-oxide-semiconductor field effect transistor M1 is connected with an end of inductance L 3 and the negative pole end of voltage-stabiliser tube DZ2,7 pin of another termination integrated circuit (IC) 3 of inductance L 3, the positive terminal ground connection of voltage-stabiliser tube DZ2,4 pin ground connection of integrated circuit (IC) 3,5 pin of integrated circuit (IC) 3 connect an end of metal-oxide-semiconductor field effect transistor M2 grid and resistance R 5, the output of another termination switching power circuit (1) of resistance R 5, the end of 6 pin connecting resistance R7 of integrated circuit (IC) 3 and an end of capacitor C 12 and BAT end, the BAT end directly links to each other with the positive pole of lithium battery, the other end of resistance R 7 is connected with 7 pin of integrated circuit (IC) 3, the other end ground connection of capacitor C 12,8 pin of integrated circuit (IC) 3 are through negative temperature coefficient resister NTC ground connection.
CN201310139883.XA 2012-12-10 2013-04-22 A kind of LED continuous illumination device Expired - Fee Related CN103220837B (en)

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CN201210525035 2012-12-10
CN201210525035.8 2012-12-10
CN201310139883.XA CN103220837B (en) 2012-12-10 2013-04-22 A kind of LED continuous illumination device

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Application Number Priority Date Filing Date Title
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CN104822211A (en) * 2014-12-12 2015-08-05 武汉绿鼎天舒科技发展有限公司 High-reliability LED illuminating device
CN108322960A (en) * 2017-12-28 2018-07-24 宁波丽安电子有限公司 A kind of band protection and self-powered LED power circuit

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CN104822211A (en) * 2014-12-12 2015-08-05 武汉绿鼎天舒科技发展有限公司 High-reliability LED illuminating device
CN108322960A (en) * 2017-12-28 2018-07-24 宁波丽安电子有限公司 A kind of band protection and self-powered LED power circuit

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