CN103220837B - A kind of LED continuous illumination device - Google Patents
A kind of LED continuous illumination device Download PDFInfo
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- CN103220837B CN103220837B CN201310139883.XA CN201310139883A CN103220837B CN 103220837 B CN103220837 B CN 103220837B CN 201310139883 A CN201310139883 A CN 201310139883A CN 103220837 B CN103220837 B CN 103220837B
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Abstract
The present invention relates to a kind of LED continuous illumination device, comprise switching power circuit, charging circuit, booster circuit, lithium battery, constant current driver circuit for LED and LED; When outside electric power network voltage is normal, LED drive circuit is directly by outside electric power network voltage driven, and charging circuit is lithium cell charging separately, ensure that lithium battery completes complete charging cycle.When after outside electric power network voltage interruption, lithium battery voltage is switched to booster circuit instantaneously, and LED drive circuit is by lithium battery voltage through boosting rear drive, and efficiency can reach more than 90%.Because the energy density of lithium battery is comparatively large, the chip integration of forming circuit is high in addition, and the whole design of this LED continuous illumination device can be done very little.Compared 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 can reach 100,000 hours.Construction site adopts LED not only can save electric energy, but also can guarantee lighting quality.
Description
Technical field
The present invention relates to a kind of LED light device, specifically, relate to a kind of LED continuous illumination device being applicable to construction site, belong to electronic technology field.
Background technology
Construction site is the scene such as tunnel, underground works particularly, has very high requirement during construction to illuminating lamp, not only requires that illuminating lamp has higher brightness and reliability, also must ensure that illumination wants uninterrupted.At present, the traditional lighting lamp that construction site is conventional, as incandescent lamp, fluorescent lamp, high-pressure sodium lamp etc. are all powered by AC network, because job site is complicated, unavoidably there will be power outage.In order to ensure building site continuous illumination, the Emergency Lighting Supply that usual installation is made up of rectifier, storage battery and inverter etc., when electrical network normal power supply, alternating current charges a battery through rectifier, when grid disruption, storage battery is powered to lighting by inverter, and the cost of this continuous illumination system is high, volume large, simultaneously through repeatedly conversion loss power is also larger.
Summary of the invention
The problem to be solved in the present invention is for above deficiency, and provide a kind of LED continuous illumination device, this lighting device can realize uninterrupted power supply, and efficiency is high.
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 the switching power circuit of electrical connection, charging circuit, booster circuit, lithium battery, constant current driver circuit for LED and LED;
Described booster circuit comprises integrated circuit (IC) 4, resistance R8, resistance R9, resistance R10, filter capacitor C14, electric capacity C15, electric capacity C16, electric capacity C17, inductance L 4 and Schottky diode DZ3;
1 pin of described integrated circuit (IC) 4 connects the output of charging circuit, one end of filter capacitor C14 and one 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, one end of 6 pin connecting resistance R9 of integrated circuit (IC) 4 and one end of resistance R10, the other end ground connection of resistance R10, one end of another termination capacitor C17 of resistance R9, the negative electrode of Schottky diode DZ3 and the output end vo ut2 of booster circuit, the other end ground connection of electric capacity C17, one end of 7 pin connecting resistance R8 of integrated circuit (IC) 4 and one end of ground capacity C15, the other end of resistance R8 connects one end of electric capacity C16, the other end ground connection of electric capacity C16, 8 pin ground connection of integrated circuit (IC) 4.
A kind of prioritization scheme, described constant current driver circuit for LED comprises integrated circuit (IC) 5, resistance R11, resistance R12, electric capacity C18, electric capacity C19, electric capacity C20, electric capacity C21, electric capacity C22, inductance L 5, diode D4 and Schottky diode DZ4;
2 pin of described integrated circuit (IC) 5 connect one end of inductance L 5, the negative pole end of Schottky diode DZ4 and one end of electric capacity C20, the other end of electric capacity C20 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, the positive pole of LED and one end of electric capacity C22, the negative pole of LED connects the other end of electric capacity C22, 6 pin of integrated circuit (IC) 5 and one end of resistance R12, the other end ground connection of resistance R12, 7 pin ground connection of integrated circuit (IC) 5, 9 pin of integrated circuit (IC) 5 connect one end of electric capacity C19, the other end ground connection of electric capacity C19, one end of 10 pin connecting resistance R11 of integrated circuit (IC) 5, 12 pin of another termination integrated circuit (IC) 5 of resistance R11 and 13 pin of IC5, and be connected with the negative pole of diode D4, 11 pin of integrated circuit (IC) 5 connect one end of electric capacity C11, the other end ground connection of electric capacity C11.
Another kind of prioritization scheme, described charging circuit comprises integrated circuit (IC) 3, resistance R5, resistance R6, resistance R7, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, 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 electric capacity C11 of series connection and resistance R6 ground connection, 2 pin of integrated circuit (IC) 3 are power pins, this pin is connected with the direct voltage Vout1 that switching power circuit exports 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 the negative pole end of one end of inductance L 3 and 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 one end of metal-oxide-semiconductor field effect transistor M2 grid and resistance R5, the output of another termination switching power circuit of resistance R5, one end of 6 pin connecting resistance R7 of integrated circuit (IC) 3 and one end of electric capacity C12 and BAT end, BAT end is directly connected with the positive pole of lithium battery, the other end of resistance R7 is connected with 7 pin of integrated circuit (IC) 3, the other end ground connection of electric capacity C12, 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: be the lithium battery booster circuit of core, the charging circuit that is core with LTC4002ES8-8.4 chip because this LED continuous illumination device have employed with LT1961, the environment that input voltage variation is larger can be adapted to.When outside electric power network voltage is normal, LED drive circuit is directly by outside electric power network voltage driven, and charging circuit is lithium cell charging separately, ensure that lithium battery completes complete charging cycle.When after outside electric power network voltage interruption, lithium battery voltage is switched to booster circuit instantaneously, and LED drive circuit is by lithium battery voltage through boosting rear drive, and efficiency can reach more than 90%.Because the energy density of lithium battery is comparatively large, the chip integration of forming circuit is high in addition, and the whole design of this LED continuous illumination device can be done very little.Compared 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 can reach 100,000 hours.Construction site adopts LED not only can save electric energy, but also can guarantee lighting quality.
Below in conjunction with drawings and Examples, the invention will be further described.
Accompanying drawing explanation
Accompanying drawing 1 is the circuit block diagram of LED continuous illumination device in the embodiment of the present invention;
Accompanying drawing 2 is the schematic diagram of embodiment of the present invention breaker in middle power circuit;
Accompanying drawing 3 is the schematic diagram of charging circuit in the embodiment of the present invention;
Accompanying drawing 4 is the schematic diagram of booster circuit in the embodiment of the present invention;
Accompanying drawing 5 is the constant current driver circuit for LED schematic diagram in the embodiment of the present invention;
In figure,
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 the switching power circuit 1 of electrical connection, charging circuit 2, booster circuit 3, lithium battery, constant current driver circuit for LED 4 and LED.
As shown in Figure 2, switching power circuit 1 comprises integrated circuit (IC) 1, integrated circuit (IC) 2, resistance R1, resistance R2, resistance R3, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, 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 three terminal regulator, its model is TL431CLP.
Alternating current 220V input voltage is through protective tube F1, electric capacity C1, reactor L1 filtering, after rectifier bridge BR1 rectification, obtain DC high voltage, this direct voltage is added to one 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 forms clamp circuit, and the pulse front edge peak voltage that switch transformer T1 leakage inductance causes is restricted to safety value; The secondary voltage of switch transformer T1, after diode D2 rectification and electric capacity C3, electric capacity C5, inductance L 2 filtering, exports 12V burning voltage Vout1.Reactor L1, electric capacity C1, electric capacity C8, electric capacity C9 are used for reducing 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 R1, electric capacity C6 current limliting, filtering, be added to 4 pin and the control end of integrated circuit (IC) 1, the voltage at electric capacity C6 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 pressure drop three sum on the voltage stabilizing value of parallel voltage-stabilizing chip IC 2, the forward voltage drop of photoelectrical coupler OC and resistance R2.When output end voltage raises, due to the voltage constant at integrated circuit (IC) 2 two ends, the input current of photoelectrical coupler OC increases, equivalent resistance between the output triode collector electrode c of photoelectrical coupler OC, emitter e reduces, 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 5 pin outputs of integrated circuit (IC) 1 reduces, output voltage Vout1 reduces, and realizes the object of voltage stabilizing.
As shown in Figure 3, charging circuit 2 comprises integrated circuit (IC) 3, resistance R5, resistance R6, resistance R7, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, 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 electric capacity C11 of series connection and resistance R6 ground connection, 2 pin of integrated circuit (IC) 3 are power pins, this pin is connected with the direct voltage Vout1 that switching power circuit exports 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 the negative pole end of one end of inductance L 3 and 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 one end of metal-oxide-semiconductor field effect transistor M2 grid and resistance R5, another termination switching power circuit of resistance R5 exports Vout1, one end of 6 pin connecting resistance R7 of integrated circuit (IC) 3 and one end of electric capacity C12 and BAT end, BAT end is directly connected with the positive pole of lithium battery, the other end of resistance R7 is connected with 7 pin of integrated circuit (IC) 3, the other end ground connection of electric capacity C12, 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 voltage, lower than 5V, enters the charging of 0.1 times of setting electric current triangular wave.
2: lithium battery voltage, higher than after 5V, enters setting electric current fast charge mode.
3: when lithium battery voltage reaches 8.4V, reach rated voltage, charging termination.
4: fast charge mode when within 3 hours, voltage is not yet more than 8.1V, restarts charging cycle until lithium battery voltage reaches 8.4V.
As shown in Figure 4, booster circuit 3 comprises integrated circuit (IC) 4, resistance R8, resistance R9, resistance R10, filter capacitor C14, electric capacity C15, electric capacity C16, electric capacity C17, inductance L 4 and Schottky diode DZ3, and the model of integrated circuit (IC) 4 is LT1961.
The output BAT of 1 pin connection charging circuit 2 of described integrated circuit (IC) 4 holds, one end of filter capacitor C14 and one 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, one end of 6 pin connecting resistance R9 of integrated circuit (IC) 4 and one end of resistance R10, the other end ground connection of resistance R10, one end of another termination capacitor C17 of resistance R9, the negative electrode of Schottky diode DZ3 and the output end vo ut2 of booster circuit 3, the other end ground connection of electric capacity C17, one end of 7 pin connecting resistance R8 of integrated circuit (IC) 4 and one end of ground capacity C15, the other end of resistance R8 connects one end of electric capacity C16, the other end ground connection of electric capacity C16, 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, after booster circuit boosting, obtain stable output voltage 12V.
As shown in Figure 5, constant current driver circuit for LED 4 comprises integrated circuit (IC) 5, resistance R11, resistance R12, electric capacity C18, electric capacity C19, electric capacity C20, electric capacity C21, electric capacity C22, 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 one end of inductance L 5, the negative pole end of Schottky diode DZ4 and one end of electric capacity C20, the other end of electric capacity C20 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, the positive pole of LED and one end of electric capacity C22, the negative pole of LED connects the other end of electric capacity C22, 6 pin of integrated circuit (IC) 5 and one end of resistance R12, the other end ground connection of resistance R12, 7 pin ground connection of integrated circuit (IC) 5, 9 pin of integrated circuit (IC) 5 connect one end of electric capacity C19, the other end ground connection of electric capacity C19, one end of 10 pin connecting resistance R11 of integrated circuit (IC) 5, 12 pin of another termination integrated circuit (IC) 5 of resistance R11 and 13 pin of IC5, and be connected with the negative pole of diode D4, 11 pin of integrated circuit (IC) 5 connect one end of electric capacity C11, the other end ground connection of electric capacity C11.
The power supply of constant current driver circuit for LED 4 is input as the output Vout1 of the switching power circuit 1 and output Vout2 of lithium battery booster circuit 3, diode D4 serves the effect of input power conversion: when mains supply is normal, because Vout1 is 12V, the current potential between diode D4 both positive and negative polarity is identical, therefore not conducting, constant current driver circuit for LED 4 is powered by Vout1, when mains supply interrupts, Vout1 is 0V, Vout2 is 12V, diode D4 forward conduction, constant current driver circuit for LED 4 is powered by Vout2.The acp chip of constant current driver circuit for LED 4 is LM3406, and its input voltage range is 6V ~ 42V, can provide the forward current being up to 1.5A, can drive 1 ~ 5 LED lamp.For guaranteeing the constant current hold of LED, LED also needs to install the working temperature that the radiator with certain area could reduce LED, ensures that the life-span of LED reaches more than 50,000 hours.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a LED continuous illumination device, is characterized in that: described lighting device comprises the switching power circuit (1) of electrical connection, charging circuit (2), booster circuit (3), lithium battery, constant current driver circuit for LED (4) and LED;
Described switching power circuit 1 comprises integrated circuit (IC) 1, integrated circuit (IC) 2, resistance R1, resistance R2, electric capacity C1, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C8, electric capacity C9, reactor L1, inductance L 2, protective tube F1, rectifier bridge BR1, switch transformer T1, voltage-stabiliser tube DZ1, diode D1, diode D2, diode D3 and photoelectrical coupler OC, integrated circuit (IC) 1 is three end PWM switch chips, its model is TOP210PFI, integrated circuit (IC) 2 is three terminal regulator, and its model is TL431CLP;
Alternating current 220V input voltage is through protective tube F1, electric capacity C1, reactor L1 filtering, after rectifier bridge BR1 rectification, obtain DC high voltage, this DC high voltage is added to one 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 forms clamp circuit, and the pulse front edge peak voltage that switch transformer T1 leakage inductance causes is restricted to safety value; The secondary voltage of switch transformer T1, after diode D2 rectification and electric capacity C3, electric capacity C5, inductance L 2 filtering, exports 12V burning voltage Vout1; Reactor L1, electric capacity C1, electric capacity C8, electric capacity C9 are used for reducing conduct radiation electric current; The feedback coil both end voltage of switch transformer T1 is through diode D3 rectification, and after resistance R1, electric capacity C6 current limliting, filtering, be added to 4 pin and the control end of integrated circuit (IC) 1, the voltage at electric capacity C6 two ends is adjusted by integrated circuit (IC) 1; The feedback voltage of switching power circuit 1 output is decided by the pressure drop three sum on the voltage stabilizing value of parallel voltage-stabilizing chip IC 2, the forward voltage drop of photoelectrical coupler OC and resistance R2; When output end voltage raises, due to the voltage constant at integrated circuit (IC) 2 two ends, the input current of photoelectrical coupler OC increases, equivalent resistance between the output triode collector electrode c of photoelectrical coupler OC, emitter e reduces, 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 5 pin outputs of integrated circuit (IC) 1 reduces, and output voltage Vout1 reduces;
Described charging circuit (2) comprises integrated circuit (IC) 3, resistance R5, resistance R6, resistance R7, electric capacity C11, electric capacity C12, electric capacity C13, 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 electric capacity C11 of series connection and resistance R6 ground connection, 2 pin of integrated circuit (IC) 3 are power pins, this pin is connected with the direct voltage Vout1 that switching power circuit (1) exports 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 the negative pole end of one end of inductance L 3 and 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 one end of metal-oxide-semiconductor field effect transistor M2 grid and resistance R5, the output of another termination switching power circuit (1) of resistance R5, one end of 6 pin connecting resistance R7 of integrated circuit (IC) 3 and one end of electric capacity C12 and BAT end, BAT end is directly connected with the positive pole of lithium battery, the other end of resistance R7 is connected with 7 pin of integrated circuit (IC) 3, the other end ground connection of electric capacity C12, 8 pin of integrated circuit (IC) 3 are through negative temperature coefficient resister NTC ground connection,
Described booster circuit (3) comprises integrated circuit (IC) 4, resistance R8, resistance R9, resistance R10, filter capacitor C14, electric capacity C15, electric capacity C16, electric capacity C17, 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 of charging circuit (2), one end of filter capacitor C14 and one 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, one end of 6 pin connecting resistance R9 of integrated circuit (IC) 4 and one end of resistance R10, the other end ground connection of resistance R10, one end of another termination capacitor C17 of resistance R9, the output end vo ut2 of the negative electrode of Schottky diode DZ3 and booster circuit (3), the other end ground connection of electric capacity C17, one end of 7 pin connecting resistance R8 of integrated circuit (IC) 4 and one end of ground capacity C15, the other end of resistance R8 connects one end of electric capacity C16, the other end ground connection of electric capacity C16, 8 pin ground connection of integrated circuit (IC) 4,
Described constant current driver circuit for LED (4) comprises integrated circuit (IC) 5, resistance R11, resistance R12, electric capacity C19, electric capacity C20, electric capacity C21, electric capacity C22, inductance L 5, diode D4 and Schottky diode DZ4;
2 pin of described integrated circuit (IC) 5 connect one end of inductance L 5, the negative pole end of Schottky diode DZ4 and one end of electric capacity C20, the other end of electric capacity C20 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, the positive pole of LED and one end of electric capacity C22, the negative pole of LED connects the other end of electric capacity C22, 6 pin of integrated circuit (IC) 5 and one end of resistance R12, the other end ground connection of resistance R12, 7 pin ground connection of integrated circuit (IC) 5, 9 pin of integrated circuit (IC) 5 connect one end of electric capacity C19, the other end ground connection of electric capacity C19, one end of 10 pin connecting resistance R11 of integrated circuit (IC) 5, 12 pin of another termination integrated circuit (IC) 5 of resistance R11 and 13 pin of IC5, and be connected with the negative pole of diode D4, 11 pin of integrated circuit (IC) 5 connect one end of electric capacity C21, the other end ground connection of electric capacity C21.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310139883.XA CN103220837B (en) | 2012-12-10 | 2013-04-22 | A kind of LED continuous illumination device |
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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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| CN103220837B true CN103220837B (en) | 2015-11-18 |
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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 |
| CN104821729A (en) * | 2014-12-12 | 2015-08-05 | 武汉绿鼎天舒科技发展有限公司 | High-reliability 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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