CN101893218A - LED tube and circuit thereof - Google Patents
LED tube and circuit thereof Download PDFInfo
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- CN101893218A CN101893218A CN 201010226086 CN201010226086A CN101893218A CN 101893218 A CN101893218 A CN 101893218A CN 201010226086 CN201010226086 CN 201010226086 CN 201010226086 A CN201010226086 A CN 201010226086A CN 101893218 A CN101893218 A CN 101893218A
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Abstract
The invention discloses an LED tube circuit which comprises a first connection end, a second connection end, a third connection end, a fourth connection end, a first rectifier bridge, a second rectifier bridge and a constant current output switch power supply. The first connection end and the second connection end are connected mutually and are connected to the first input ends of the first and second rectifier bridges. The third connection end is connected with the second input end of the first rectifier bridge. The fourth connection end is connected with the second input end of the second rectifier bridge. The first output end of the first rectifier bridge and the first output end of the second rectifier bridge are respectively connected to the first input end of the constant current output switch power supply. The second output end of the first rectifier bridge and the second output end of the second rectifier bridge are respectively connected with the second input end of the constant current output switch power supply. The invention further discloses an LED tube adopting the LED tube circuit. The LED tube and the LED tube circuit can be truly compatible with the traditional fluorescent tube.
Description
[technical field]
The present invention relates to electronic circuit, particularly a kind of LED fluorescent tube and circuit thereof of compatible conventional fluorescent tube rack.
[background technology]
Seeing also Fig. 1, is prior art fluorescent tube circuit schematic diagram.This fluorescent tube circuit comprises switch 10, tube rack 20 and the fluorescent tube 30 that connects civil power live wire L.This tube rack 20 comprises the ballast 21 and the starter 22 of series connection.These fluorescent tube 30 two ends comprise filament link A1 and A2, A3 and A4 respectively.Ballast 21 1 ends connect switch 10, and the other end connects filament link A2, and starter 22 two ends are connected to filament link A1, A4, and filament link A3 is connected to civil power zero line N.During this fluorescent tube circuit work, switch 10 closed conductings, ballast 21, fluorescent tube 30, starter 22 (cross-over connection is connected in the tube filament circuit) are connected into the loop.Neon bulb in the starter 22 is lighted, is generated heat, and makes refreshing sheet metal bending wherein, and neon bulb is by short circuit.Thereby electric current reaches maximum in the loop that filament constitutes in power supply, ballast 21, the fluorescent tube 30.After the short circuit of neon bulb cup, bimetal leaf cools off the disconnection that resets, and makes current interruptions in the while starter 22.Because counter electromotive force that ballast 21 internal inductances produce and power supply stack back are at fluorescent tube 30 two ends, high voltage punctures the gas (comprising mercury vapour) in the fluorescent tube 30 and lights, fluorescent tube 30 two ends electric currents heighten, and voltage drops under the starter operating voltage.At this moment, rely on the ballast 21 that is connected in the circuit to limit electric current.
As everyone knows, the fluorescent tube life-span is shorter, and also has noxious material, is unfavorable for environmental protection.Because LED (light emitter diode, light emitting diode) fluorescent tube has advantages such as life-span length, energy-saving and environmental protection,, and replace the main flow that the conventional fluorescent fluorescent tube becomes lighting field gradually by the various illumination occasions that are applied in more and more widely.Along with and the problem that occurs be, existing LED fluorescent tube adopts socket or screw socket more, not seeing has LED to make the directly technology of replace fluorescent lamps pipe, traditional fluorescent tube lamp bracket also is not suitable for general LED fluorescent tube, and currently used led drive circuit is not suitable for fluorescent lamp ballast coupling yet and is suitable for.
[summary of the invention]
In order to solve the above-mentioned technical problem of prior art, be necessary to provide a kind of with the fluorescent lamp compatibility, can use at the LED fluorescent tube and the circuit thereof that have now on the florescent lamp fitting.
The present invention solves the technical scheme that existing technical problem adopts: a kind of LED tube circuit, it comprises first link, second link, the 3rd link, the 4th link, first rectifier bridge, second rectifier bridge and constant current output Switching Power Supply, this first link and second link interconnect and are connected to the first input end of this first rectifier bridge and the first input end of second rectifier bridge, the 3rd link is connected to second input of first rectifier bridge, the 4th link is connected to second input of this second rectifier bridge, first output of this first rectifier bridge is connected the first input end that Switching Power Supply is exported in this constant current respectively with first output of this second rectifier bridge, and second output of this first rectifier bridge is connected second input that Switching Power Supply is exported in this constant current respectively with second output of this second rectifier bridge.
In the LED tube circuit of the present invention, also comprise first network and second network, this first link is connected with second link, and be connected to the first input end of first network and the first input end of second network simultaneously, the 3rd link is connected to second input of first network, the 4th link is connected to second input of second network, first output of this first network and second output are connected the first input end and second input of first rectifier bridge respectively, first output of this second network and second output are connected the first input end and second input of second rectifier bridge respectively, and this first network and second network are the Electro Magnetic Compatibility networks.
In the LED tube circuit of the present invention, also comprise the light emitting diode of a plurality of series connection, the series arm two ends of these a plurality of light emitting diodes connect first output and second output of this constant current output Switching Power Supply respectively.
In the LED tube circuit of the present invention, this first rectifier bridge and this second rectifier bridge include four end to end commutation diodes.
In the LED tube circuit of the present invention, this first link and second link are to be connected to first network by fuse.
Another technical scheme provided by the invention is: a kind of LED fluorescent tube, it comprises above-mentioned LED tube circuit.
Compared to prior art, first rectifier bridge of LED fluorescent tube of the present invention and second rectifier bridge are converted to direct current with the alternating current input and are input to constant current output switch.This constant current output Switching Power Supply provides luminous required operating voltage for LED.Therefore, starter has only an end to be connected with the input power supply with second link by first link, so starter can not worked all the time.This shows, after LED fluorescent tube of the present invention adopts the foregoing circuit structure, only need to insert in the conventional lights pipe support and can use as the conventional fluorescent lamps pipe, popularization and application for the LED fluorescent tube has bigger positive effect, when adopting the LED fluorescent tube of more energy-conserving and environment-protective, do not need to change original fluorescent tube lighting circuit, really realized complete compatibility with the conventional fluorescent lamps pipe.
[description of drawings]
Fig. 1 is a conventional fluorescent lamps spot frame electrical block diagram.
Fig. 2 is the structural representation of LED fluorescent tube one better embodiment of the present invention.
Fig. 3 is the electrical block diagram of LED fluorescent tube shown in Figure 2.
Fig. 4 is the circuit diagram of the compatible conventional fluorescent lamps pipe of LED fluorescent tube shown in Figure 2.
[specific embodiment]
Be described in further detail below in conjunction with accompanying drawing and embodiments of the present invention.
Seeing also Fig. 2, is the structural representation of LED fluorescent tube one better embodiment of the present invention.This LED fluorescent tube 200 is the long strip type tube-like tube, and two ends have the first link C1 and the second link C2, the 3rd link C3 and the 4th link C4 respectively.This fluorescent tube inside comprises the LED lamp tube drive circuit.
Please consulting Fig. 3 simultaneously, is the electrical block diagram of LED fluorescent tube 200 shown in Figure 2.This LED fluorescent tube 200 comprises the LED of first network 100, second network 110, the first rectifier bridge BD1, the second rectifier bridge BD2, constant current output Switching Power Supply 120 and a plurality of series connection.This first link C1 is connected with the second link C2, and is connected to the first input end 101 of first network 100 and the first input end 111 of second network 110 simultaneously.The 3rd link C3 is connected to second input 102 of first network 100.The 4th link C4 is connected to second input 112 of second network 110.This first network 100 and second network 110 are Electro Magnetic Compatibility (Electro MagneticCompatibility, EMC) networks.
Please consulting Fig. 4 simultaneously, is the circuit diagram of LED fluorescent tube 200 compatible conventional fluorescent lamps pipes shown in Figure 2.In the present embodiment, the first link C1 and the second link C2 are connected to first network 100 by fuse 1, and have formed an end of AC power input.Starter 322 two ends are connected to the first link C1 and the 4th link C4.The second link C2 connects civil power live wire end L by ballast 321, switch 310.The 3rd link C3 connects civil power zero line side N.
When LED fluorescent tube 200 of the present invention was worked, the first rectifier bridge BD1 and the second rectifier bridge BD2 were converted to direct current with the alternating current input and are input to constant current output Switching Power Supply 120.This constant current output Switching Power Supply 120 provides luminous required operating voltage for LED.In conjunction with Fig. 3 and shown in Figure 4, starter 322 has only an end to be connected with the input power supply with the second link C2 by the first link C1, so starter 322 can not worked all the time.This shows, after LED fluorescent tube 200 of the present invention adopts the foregoing circuit structure, only need to insert in the conventional lights pipe support 320 and can use as the conventional fluorescent lamps pipe, popularization and application for the LED fluorescent tube has bigger positive effect, when adopting the LED fluorescent tube of more energy-conserving and environment-protective, do not need to change original fluorescent tube lighting circuit, really realized complete compatibility with the conventional fluorescent lamps pipe.
Consult Fig. 3, the present invention does not have specific requirement for the circuit of first network 100 and second network 110, even can omit first network 100 and second network 110, all should be considered as belonging to protection scope of the present invention.In addition; the present invention does not have specific requirement for the circuit of constant current output Switching Power Supply 120; promptly so long as the Switching Power Supply of frequency more than 20KHz; no matter be instead swash, normal shock, half-bridge, recommend, circuit such as full-bridge all belongs to the mentioned constant current output Switching Power Supply of the present invention, all should be considered as belonging to protection scope of the present invention.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. LED tube circuit, it is characterized in that: comprise first link, second link, the 3rd link, the 4th link, first rectifier bridge, second rectifier bridge and constant current output Switching Power Supply, this first link and second link interconnect and are connected to the first input end of this first rectifier bridge and the first input end of second rectifier bridge, the 3rd link is connected to second input of first rectifier bridge, the 4th link is connected to second input of this second rectifier bridge, first output of this first rectifier bridge is connected the first input end that Switching Power Supply is exported in this constant current respectively with first output of this second rectifier bridge, and second output of this first rectifier bridge is connected second input that Switching Power Supply is exported in this constant current respectively with second output of this second rectifier bridge.
2. LED tube circuit according to claim 1, it is characterized in that: also comprise first network and second network, this first link is connected with second link, and be connected to the first input end of first network and the first input end of second network simultaneously, the 3rd link is connected to second input of first network, the 4th link is connected to second input of second network, first output of this first network and second output are connected the first input end and second input of first rectifier bridge respectively, first output of this second network and second output are connected the first input end and second input of second rectifier bridge respectively, and this first network and second network are the Electro Magnetic Compatibility networks.
3. LED tube circuit according to claim 2 is characterized in that: also comprise the light emitting diode of a plurality of series connection, the series arm two ends of these a plurality of light emitting diodes connect first output and second output of this constant current output Switching Power Supply respectively.
4. LED tube circuit according to claim 3 is characterized in that: this first rectifier bridge and this second rectifier bridge include four end to end commutation diodes.
5. LED tube circuit according to claim 4 is characterized in that: this first link and second link are to be connected to first network by fuse.
6. a LED fluorescent tube is characterized in that: comprise arbitrary described LED tube circuit according to claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010226086 CN101893218A (en) | 2010-07-13 | 2010-07-13 | LED tube and circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010226086 CN101893218A (en) | 2010-07-13 | 2010-07-13 | LED tube and circuit thereof |
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|---|---|
| CN101893218A true CN101893218A (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010226086 Pending CN101893218A (en) | 2010-07-13 | 2010-07-13 | LED tube and circuit thereof |
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| CN (1) | CN101893218A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305356A (en) * | 2011-05-20 | 2012-01-04 | 宁波欧上照明有限公司 | Light-emitting diode (LED) fluorescent lamp with rotatable lamp heads |
| CN103037582A (en) * | 2012-12-18 | 2013-04-10 | 东莞市领冠半导体照明有限公司 | Light-emitted diode (LED) daylight lamp power source compatible with fluorescent lamp system |
| CN103037561A (en) * | 2011-09-30 | 2013-04-10 | 上海永星电子开关有限公司 | Light-emitting diode (LED) indicator lamp circuit capable of resisting low voltage starting |
| WO2014139235A1 (en) * | 2013-03-12 | 2014-09-18 | 深圳市聚作照明股份有限公司 | Led lamp capable of directly replacing ballast fluorescent tube and device thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201199743Y (en) * | 2008-05-19 | 2009-02-25 | 大焱电机有限公司 | Lamp string control circuit |
| CN201318576Y (en) * | 2008-07-09 | 2009-09-30 | 东莞勤上光电股份有限公司 | LED fluorescent tube |
| US20090303720A1 (en) * | 2005-02-28 | 2009-12-10 | Leddynamics, Inc. | LED Lighting Device |
| CN201733477U (en) * | 2010-07-13 | 2011-02-02 | 深圳市金流明光电技术有限公司 | LED tube and circuit thereof |
-
2010
- 2010-07-13 CN CN 201010226086 patent/CN101893218A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090303720A1 (en) * | 2005-02-28 | 2009-12-10 | Leddynamics, Inc. | LED Lighting Device |
| CN201199743Y (en) * | 2008-05-19 | 2009-02-25 | 大焱电机有限公司 | Lamp string control circuit |
| CN201318576Y (en) * | 2008-07-09 | 2009-09-30 | 东莞勤上光电股份有限公司 | LED fluorescent tube |
| CN201733477U (en) * | 2010-07-13 | 2011-02-02 | 深圳市金流明光电技术有限公司 | LED tube and circuit thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305356A (en) * | 2011-05-20 | 2012-01-04 | 宁波欧上照明有限公司 | Light-emitting diode (LED) fluorescent lamp with rotatable lamp heads |
| CN102305356B (en) * | 2011-05-20 | 2013-09-25 | 宁波欧上照明有限公司 | Light-emitting diode (LED) fluorescent lamp with rotatable lamp heads |
| CN103037561A (en) * | 2011-09-30 | 2013-04-10 | 上海永星电子开关有限公司 | Light-emitting diode (LED) indicator lamp circuit capable of resisting low voltage starting |
| CN103037561B (en) * | 2011-09-30 | 2015-12-02 | 上海永星电子开关有限公司 | A kind of can the LED light circuit of anti-low-voltage starter |
| CN103037582A (en) * | 2012-12-18 | 2013-04-10 | 东莞市领冠半导体照明有限公司 | Light-emitted diode (LED) daylight lamp power source compatible with fluorescent lamp system |
| WO2014139235A1 (en) * | 2013-03-12 | 2014-09-18 | 深圳市聚作照明股份有限公司 | Led lamp capable of directly replacing ballast fluorescent tube and device thereof |
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Application publication date: 20101124 |