CN201733477U - LED tube and circuit thereof - Google Patents
LED tube and circuit thereof Download PDFInfo
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- CN201733477U CN201733477U CN2010202574099U CN201020257409U CN201733477U CN 201733477 U CN201733477 U CN 201733477U CN 2010202574099 U CN2010202574099 U CN 2010202574099U CN 201020257409 U CN201020257409 U CN 201020257409U CN 201733477 U CN201733477 U CN 201733477U
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Abstract
The utility model discloses a circuit of an LED tube, comprising a first connecting end, a second connecting end, a third connecting end, a fourth connecting end, a first rectifier bridge, a second rectifier bridge, and a constant-current output switch power supply; wherein the first connecting end and the second connecting end are mutually connected and then respectively connected to the first input end of the first rectifier bridge and the first input end of the second rectifier bridge; the third connecting end is connected with the second input end of the first rectifier bridge; the fourth connecting end is connected to 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 with the first input end of the constant-current input 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 utility model further discloses an LED tube of the circuit of the LED tube. The LED tube and the circuit thereof can really realize compatibility with traditional fluorescent tubes.
Description
[technical field]
The utility model 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 back 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 substance, 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.
[utility model content]
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 technical scheme that the existing technical problem that solves the utility model adopts is: 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 utility model LED tube circuit, 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 utility model LED tube circuit, 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 utility model LED tube circuit, this first rectifier bridge and this second rectifier bridge include four end to end rectifier diodes.
In the utility model LED tube circuit, this first link and second link are to be connected to first network by fuse.
Another technical scheme that the utility model provides is: a kind of LED fluorescent tube, it comprises above-mentioned LED tube circuit.
Compared to prior art, first rectifier bridge of the utility model LED fluorescent tube 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 the utility model LED fluorescent tube 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 the utility model LED fluorescent tube one better embodiment.
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.
[embodiment]
Be described in further detail below in conjunction with accompanying drawing and execution mode of the present utility model.
Seeing also Fig. 2, is the structural representation of the utility model LED fluorescent tube one better embodiment.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 C 3 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 Magnetic Compatibility, 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.
During 200 work of the utility model LED fluorescent tube, the first rectifier bridge BD1 and the second rectifier bridge BD2 are 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 the utility model LED fluorescent tube 200 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 utility model 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 range of the present utility model.In addition; the utility model 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 20K Hz; 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 utility model, all should be considered as belonging to protection range of the present utility model.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
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 rectifier 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 |
|---|---|---|---|
| CN2010202574099U CN201733477U (en) | 2010-07-13 | 2010-07-13 | LED tube and circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202574099U CN201733477U (en) | 2010-07-13 | 2010-07-13 | LED tube and circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201733477U true CN201733477U (en) | 2011-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202574099U Expired - Fee Related CN201733477U (en) | 2010-07-13 | 2010-07-13 | LED tube and circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201733477U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893218A (en) * | 2010-07-13 | 2010-11-24 | 深圳市金流明光电技术有限公司 | LED tube and circuit thereof |
-
2010
- 2010-07-13 CN CN2010202574099U patent/CN201733477U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893218A (en) * | 2010-07-13 | 2010-11-24 | 深圳市金流明光电技术有限公司 | LED tube and circuit thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20170713 |