CN203708536U

CN203708536U - Completely-compatible low-ripple LED fluorescent lamp

Info

Publication number: CN203708536U
Application number: CN201320487116.3U
Authority: CN
Inventors: 梁贵斌; 蒙国华
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-08-01
Filing date: 2013-08-01
Publication date: 2014-07-09
Anticipated expiration: 2023-08-01

Abstract

The utility model discloses a completely-compatible low-ripple LED fluorescent lamp, and the fluorescent lamp comprises input ends and output ends. The fluorescent lamp is characterized in that the input ends comprise four input ends which are a first input end (11), a second input end (12), a third input end (13), and a fourth input end (14), wherein the four input ends are respectively with four pins at two ends of the fluorescent lamp; the output end DC+ and the output end DC- are respectively connected to the LED lamp; the first input end (11) and the second input end (12) are respectively connected with an oscillation feedback signal coupling rectification circuit, an electronic-ballast oscillation signal control circuit, and a power voltage detection circuit; and the third input end (13) and the fourth input end (14) are respectively connected with an oscillation feedback signal coupling conduction circuit. A power supply is compatible with an electronic ballast, and can automatically control the output power of the electronic ballast according to the load power of the LED fluorescent lamp tube, thereby achieving the effective energy-saving effect of the LED fluorescent lamp.

Description

A kind of low ripple LED fluorescent lamp of full compatibility

Technical field

The utility model relates to a kind of daylight lamp power source, is specifically related to a kind of low ripple LED daylight lamp power source of full compatibility.

Background technology

Along with development and the popularization and application of LED lighting technology, it is high that LED has luminous efficiency, and LED illuminating product miscellaneous, appears in the advantages such as long service life and high-quality light efficiency in recent years, for example LED fluorescent lamp, LED bulb lamp, LED Panel light and LED Down lamp etc.Due to the LED product pay attention to day by day of countries in the world to energy-conserving and environment-protective, make the market prospects of LED energy-saving lamp product boundless.

During people constantly carry out the discussion of electric ballast driving LED illumination, for example utility model patent 201220182562.9 discloses electric ballast driving LED modular converter.This module is utilized the electric energy driving LED obtaining after the direct current limliting rectifying and wave-filtering of the high-frequency and high-voltage power supply voltage stabilizing of electric ballast output.Because not being directly controls electric ballast output, be to utilize resistance and current limit by inductance and triode voltage stabilizing pattern, power output and energy-saving effect have much room for improvement.Also AC AC power that cannot compatible single-ended input.

Drive because LED must use DC power supply, therefore every money light fixture all will be equipped with the galvanic driving power of a energy output.These power supplys are all to use alternating current conversion to obtain, and exist larger current ripples after conversion, and when current ripples exceedes 5% when above, LED lamp just there will be by the observable flicker of camera.

Early stage fluorescent tube, is furnished with coil ballast and neon bulb starter, utilizes the heating power conducting of neon bulb starter and disconnection process to make coil ballast produce high voltage pulse, lights fluorescent tube.Because energy consumption is high and the development of electronic technology, coil ballast is progressively replaced by electric ballast.

Traditional type fluorescent tube has been installed and used in huge numbers of families, and it has all been equipped with the fixed support that coil ballast or electric ballast are housed.At present because the output of electric ballast is high-frequency high-voltage constant-current formula, common LED fluorescent lamp driving power supply can't adapt to the output characteristic of electric ballast, after must removing electric ballast and the straight-through AC alternating current of repacking to original fluorescent tube fixed support, could use, the fluorescent lighting fixture after repacking cannot directly use common fluorescent tube again.Also some user has reequiped LED fluorescent lamp single-ended or Double-End Source input simultaneously, installs and brings very big puzzlement like this to domestic consumer, cannot install and use voluntarily.

Summary of the invention

Problem that can not compatible electronic ballast for the LED daylight lamp power source existing in prior art, the purpose of this utility model is to provide a kind of low ripple LED daylight lamp power source solution of full compatible electronic ballast.

The utility model provides a kind of low ripple LED daylight lamp power source of compatible electronic ballast, comprise input and output, wherein, described input comprises four power inputs: first input end 11, the second input 12, the 3rd input 13 and four-input terminal 14, is connected on 4 contact pins at LED fluorescent tube two ends, and described output DC+ output DC-is connected on LED lamp;

Described first input end 11 is connected oscillatory feedback signal coupling rectification circuit with the second input 12, electric ballast oscillator signal control circuit and voltage detection circuit, described the 3rd input 13 is connected oscillatory feedback signal coupling turning circuit with four-input terminal 14.

Described daylight lamp power source further comprises conduction and radiation buffer circuit.

Described daylight lamp power source further comprises the power-switching circuit for LED pressure-stabilizing constant flow.

Described daylight lamp power source further comprises the electric source filter circuit for preventing LED flicker, and current ripples is eliminated circuit.

Described daylight lamp power source output connects LED lamp.

Described first input end 11 and the second input 12, the three inputs 13 and four-input terminal 14 connecting electronic ballast respectively, the external AC AC power of described electric ballast.

In described input, any 2 inputs connect AC alternating current, and the input of institute's connection alternating current connects rectification circuit, by rectification circuit, AC alternating current is directly rectified into DC power supply.

Compared with prior art, the utility model has the advantage of: the utility model has overcome existing LED daylight lamp power source and can not be compatible with the shortcoming of traditional fluorescent lamp electric ballast, can be according to the power output of the bearing power automatic control electronic ballast of LED fluorescent tube in compatible electronic ballast, reach effective LED daylight lamp energy-saving effect.The utility model, can also compatible coil ballast and the AC AC power that leads directly to single both-end input except compatible electronic ballast for fluorescent lamp.

Accompanying drawing explanation

The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is coil ballast wiring schematic diagram of the present utility model.

Fig. 2 is electric ballast wiring schematic diagram of the present utility model.

Fig. 3 is straight-through AC alternating current both-end input schematic diagram of the present utility model.

Fig. 4 is the single-ended input schematic diagram of straight-through AC alternating current of the present utility model.

Fig. 5 is operation principle schematic diagram of the present utility model.

Embodiment

Fig. 1 is coil ballast wiring schematic diagram

When AC AC power is through Inductive ballast, the AC power of low frequency cannot effectively be passed through C1, and the electric capacity of C2 and C3 arrives neon bulb starter, and neon bulb starter is not worked.AC AC power directly arrives rectifier diode D1 through Inductive ballast, D2, and D3, D4, D5, D6, D7, D8 is rectified into direct current, carries out filtering by capacitor C 5.Make C5 obtain a galvanic current source, then power and use to LED by power-switching circuit.

Figure 2 shows that electric ballast wiring schematic diagram, electric ballast oscillatory feedback signal will be by two ends conducting ability oscillatory work the power output of fluorescent tube.Shown in Fig. 5, electric ballast oscillatory feedback signal Zheng Ban Week gets back to electric ballast by C1 → D10 → Q1 → D11 → C2.Electric ballast oscillatory feedback signal Fu Ban Week gets back to electric ballast by C2 → D12 → Q1 → D9 → C1.First input end 11 and the complete conducting of the second input 12 electric ballast feedback signal.The 3rd input 13 of electric ballast and four-input terminal 14 electronic feedback signal Zheng Ban Week and Fu Ban Week signal are by the conducting of C3 coupling capacitance.When after first input end 11 and the second input 12 oscillatory feedback signals and the 3rd input 13 and four-input terminal 14 oscillatory feedback signal conductions, electric ballast work, the high frequency electric source of output can pass through D1, D2, D3, D4, D5, D6, D7, the rectification of D8 and the filter capacitor of C5 obtain the required direct current energy of power-switching circuit.When the direct voltage obtaining is during higher than set point, by R3, R4, R5, ZD2, ZD3, the voltage detecting circuit of C4 composition makes Q2 conducting → Q1 cut-off → electric ballast first input end 11 and the second input 12 cut off → electric ballasts of oscillatory feedback signal stop output.When the direct voltage obtaining is during lower than the required direct current energy of power-switching circuit, by R3, R4, R5, ZD2, ZD3, the voltage detecting circuit of C4 composition makes Q2 cut-off → Q1 conducting → electric ballast first input end 11 and second input 12 oscillatory feedback signal conduction → electric ballast work outputs, meets thereby make C5 obtain one the DC power supply that power supply conversion requires.Power and use to LED by power-switching circuit again.

Shown in Fig. 3 and Fig. 4: when AC alternating current is connected to any two inputs 11,12,13,14 of compatible electronic ballast LED daylight lamp power source, by rectification circuit, AC alternating current is directly rectified into DC power supply as shown in Figure 5, carries out filtering by C5 electric capacity.Make C5 electric capacity obtain a galvanic current source, then power and use to LED by power-switching circuit.

DC ripple is eliminated

Shown in Fig. 5, by R12, R13, R14, ZD4, D5 and Q3 have formed an electronic filtering circuit, R12, ZD4, D5, the G utmost point that C9 is Q3 provides a galvanic current to press, in the time that the electric current of R14 increases, the voltage drop of R14 just raises, and the voltage of the G of Q3 and the S utmost point just reduces, Q3 On current is reduced, thereby reach the object of stabilizing output current.

The improvement that the utility model carries out mainly for LED daylight lamp power source, the foregoing is only the utility model preferred embodiment, non-ly therefore limit to the scope of the claims of the present invention, therefore such as use the utility model specification and graphic whole or the part so-called simple and easy variation of content and equivalent transformation, utilize the work of the oscillatory feedback signal controlling electric ballast of electric ballast, utilize content of the present utility model to power with electric loading or equipment to other beyond LED lamp, all should be contained in the scope of the claims of the present utility model.

Claims

1. a complete compatible low ripple LED fluorescent lamp, comprises input and output, it is characterized in that:

Described input comprises four power inputs: first input end (11), the second input (12), the 3rd input (13) and four-input terminal (14), is connected on 4 contact pins at LED fluorescent tube two ends;

Described output is connected on LED lamp.

2. complete compatible low ripple LED fluorescent lamp as claimed in claim 1, it is characterized in that: described first input end (11) is connected oscillatory feedback signal coupling rectification circuit with the second input (12), electric ballast oscillator signal control circuit and voltage detection circuit, described the 3rd input (13) is connected oscillatory feedback signal coupling turning circuit with four-input terminal (14).

3. complete compatible low ripple LED fluorescent lamp as claimed in claim 1, is characterized in that: described daylight lamp power source further comprises conduction and radiation buffer circuit.

4. complete compatible low ripple LED fluorescent lamp as claimed in claim 1, is characterized in that: described daylight lamp power source further comprises the power-switching circuit for LED pressure-stabilizing constant flow.

5. complete compatible low ripple LED fluorescent lamp as claimed in claim 2, is characterized in that: described output circuit connects DC ripple circuit.

6. complete compatible low ripple LED fluorescent lamp as claimed in claim 1, it is characterized in that: described first input end (11) and the second input (12), the 3rd input (13) and four-input terminal (14) be connecting electronic ballast respectively, described electric ballast external AC power supply.

7. complete compatible low ripple LED fluorescent lamp as claimed in claim 1, it is characterized in that: in described input, any 2 inputs connect AC alternating current, the input of institute's connection alternating current connects rectification circuit, by rectification circuit, AC alternating current is directly rectified into DC power supply.