CN201795360U - LED fluorescent lamp - Google Patents
LED fluorescent lamp Download PDFInfo
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- CN201795360U CN201795360U CN201020505031XU CN201020505031U CN201795360U CN 201795360 U CN201795360 U CN 201795360U CN 201020505031X U CN201020505031X U CN 201020505031XU CN 201020505031 U CN201020505031 U CN 201020505031U CN 201795360 U CN201795360 U CN 201795360U
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Abstract
The utility model relates to an LED fluorescent lamp, which comprises a lamp tube casing, at least one lamp panel and a rectifier, wherein, LED lamp bulbs connected in parallel are arranged on the lamp panel; one end of the rectifier is connected with an alternating current power supply, and the other end of the rectifier is connected with the lamp panel; in addition, the rectifier comprises a passivity power factor correction circuit, a step-down rectifier filter circuit and a buck converter circuit which are connected in sequence. The LED fluorescent lamp disclosed by the utility model can work in a constant current manner within a very wide voltage range.
Description
Technical field
The utility model relates to a kind of LED fluorescent lamp, relates in particular to a kind of LED fluorescent lamp.
Background technology
The LED fluorescent lamp with of fine quality, durable, energy-conservation be main feature, the crevice projection angle adjustable range is big, the brightness of 15W is equivalent to common 40W fluorescent lamp, high temperature resistance, moistureproof and waterproof, anticreep.LED fluorescent lamp operating voltage is wide voltage, from 80V to 245V, all can use, and optional glass of outer cover or PC material, lamp holder is the same with common fluorescent lamp.
The LED fluorescent lamp adopts up-to-date led light source technology, the digitisation appearance design, economize on electricity is up to more than 70%, and the fluorescent tube LED fluorescent lifetime that the LED fluorescent lamp light intensity of 12W is equivalent to 40W is more than 10 times of common fluorescent tube, almost non-maintaining, need not often change fluorescent tube, ballast, starter.The semi-conductor electricity light source of environmental protection, light is soft, and spectroscopic pure helps user's sight protectio and healthy.The cold light source of 6000K is given the visually refrigerant impression of people, and the differences of illumination intensities design of hommization more helps to concentrate on, and raises the efficiency.Be AC85V-260V (interchange) at 50,000-80,000 hours supply voltages service life, start fast, power is little, no stroboscopic, be not easy visual fatigue, its not only superpower energy-conservation more environmental protection is one of product of national green energy conservation illuminating engineering focus development, is the major product that replaces traditional fluorescent lamp at present.
Traditional fluorescent lamp is to light by the high voltage that rectifier discharges, and then can't light when voltage reduces.And the LED fluorescent lamp can both be lighted within the voltage of certain limit, can also adjust brightness, and electric current in very wide voltage range should be constant current when LED fluorescent lamp system.
The utility model content
At above-mentioned requirements, the utility model provides a kind of LED fluorescent lamp, has guaranteed the constant current work in very wide voltage range of LED fluorescent lamp.
To achieve these goals, the technical scheme that its technical problem that solves the utility model adopts is: a kind of LED fluorescent lamp, comprise the fluorescent tube housing, and at least one lamp plate, lamp plate is provided with the LED lamp pearl that is connected in parallel, (in the embodiment of the invention, having 12 on the lamp plate at least is connected in parallel and 11 LED coupled in series lamp pearls), also comprise rectifier, one end of described rectifier connects AC power, the other end connects lamp plate, and described rectifier comprises passive power factor correcting circuit, decompression rectifier filter circuit and decompression transducer circuit, and link to each other successively; Wherein, described passive power factor correcting circuit is connected with the first diode D1 by the first capacitor C E1, and first resistance R 1, the second diode D2 connect with second resistance R 2, and the 3rd diode D3 connects with the second capacitor C E2, formed each branch road carries out that back in parallel forms again; Described decompression rectifier filter circuit is by voltage-stabiliser tube DZ1 and the 3rd capacitor C E3 parallel connection, connect again the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 formed branch roads, and again, the 4th capacitor C E4 in parallel is formed; Described decompression transducer circuit is by control chip U1, power tube Q1, the 4th diode D4 series connection, and shunt inductance LM1 is formed again.
In preferred embodiment of the utility model, the first terminal J1 input AC 220V voltage of described rectifier, the second terminal J2 connects LED lamp pearl.
In preferred embodiment of the utility model, the alternating voltage of described the first terminal J1 input is transformed to high direct voltage by converter DB1.
In preferred embodiment of the utility model, described passive power factor correcting circuit is connected to the two ends of converter DB1.
In preferred embodiment of the utility model, described control chip U1 gathers the 7th resistance R 7, the eight resistance R 8, the nine resistance R 9, the peak point current that the tenth resistance R 10 backs parallel with one another are produced carries out constant current control by the pulse duty factor on the internal logic control power tube Q1 signal.
In preferred embodiment of the utility model, the turn-off time of described power tube Q1 is set by the 6th resistance R 6.
In preferred embodiment of the utility model, described control chip U1 is powered by decompression rectifier filter circuit, provides sampled voltage to carry out voltage compensation for 2 pin of control chip U1 simultaneously.
The LED fluorescent lamp that the utility model disclosed, mainly comprise by at least one circuit board and at least two fluorescent tube housings that the LED lamp pearl that is connected in parallel is formed, its circuit board is a rectifier, the first terminal J1 input AC 220V voltage of rectifier, DB1 is transformed to high direct voltage by converter, actual peak point current raises along with the rising of input voltage, for 2 pin of the variation control chip U1 that compensates this peak point current are used for detecting input voltage, along with input voltage raises, reduce the threshold voltage value on the control chip U1 pin, the service time of power tube Q1 is just short, the electric current that flows through inductance L M1 just reduces, and has guaranteed the constant current in very wide voltage range of LED fluorescent lamp like this.
In addition, a plurality of LED lamp pearls are connected in parallel, and work alone each other, are convenient to the replacing of lamp pearl and the maintenance of LED fluorescent lamp.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified:
Fig. 1 is the fundamental diagram of preferred embodiment LED fluorescent lamp rectifier of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail, thereby protection domain of the present utility model is made more explicit defining so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that.
The utility model provides a kind of LED fluorescent lamp, comprise the fluorescent tube housing, and at least one lamp plate, among the utility model embodiment, be provided with 12 above the lamp plate and be connected in parallel and 11 LED coupled in series lamp pearls, also comprise rectifier, wherein, one end of rectifier connects AC power, other end connecting circuit plate, and pearl is connected with circuit board the LED lamp.
As shown in Figure 1, it is the fundamental diagram of preferred embodiment LED fluorescent lamp rectifier of the present utility model, the first terminal J1 input AC 220V voltage of rectifier, the second terminal J2 connects LED lamp pearl, and the alternating voltage of the first terminal J1 input is transformed to high direct voltage by DB1.Rectifier in the utility model mainly comprises passive power factor correcting circuit, decompression rectifier filter circuit and decompression transducer circuit, and link to each other successively, wherein, passive power factor correcting circuit is connected with the first diode D1 by the first capacitor C E1, first resistance R 1, the second diode D2 connect with second resistance R 2, the 3rd diode D3 connects with the second capacitor C E2, and formed each branch road carries out that back in parallel forms again; Described decompression rectifier filter circuit is by voltage-stabiliser tube DZ1 and the 3rd capacitor C E3 parallel connection, connect again the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 formed branch roads, and again, the 4th capacitor C E4 in parallel is formed; Described decompression transducer circuit is by control chip U1, power tube Q1, the 4th diode D4 series connection, and shunt inductance LM1 is formed again.
Control chip U1 gathers the peak point current that the 7th resistance R 7, the eight resistance R 8, the nine resistance R 9, the ten resistance R 10 backs parallel with one another are produced in the utility model, carries out constant current control by the pulse duty factor on the internal logic control power tube Q1 signal.The turn-off time of the 6th resistance R 6 setting power pipe Q1, control chip U1 is by the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, voltage-stabiliser tube DZ1 and the 3rd capacitor C E3, the 4th capacitor C E4 forms the decompression rectifier filter circuit power supply, provides sampled voltage to carry out voltage compensation for 2 pin of chip U1 simultaneously.
In each cycle, 4 pin of control chip U1 go out low level, and power tube Q1 opens, and electric current is by 2 pin of the second terminal J2, LED fluorescent lamp positive pole, LED luminous tube, LED fluorescent tube negative pole, 1 pin of the second terminal J2 flows into inductance L M1, and power tube Q1 enters circuit ground.Threshold voltage value decision on the time control chip U1 pin of opening, voltage is low more, and service time is short more, and the electric current that flows through is just little.By rising to peak value when inductive current, the 4 pin output high level of control chip U1, at this moment power tube Q1 turn-offs, electric current passes through 2 pin of the 4th diode D4 to the second terminal J2 by inductance L M1, LED fluorescent lamp positive pole, LED luminous tube, LED fluorescent tube negative pole, 1 pin of the second terminal J2 flows into inductance L M1 again.Turn-off time has spent the turn-off time of setting by 6 decisions of the 6th resistance R, and 4 pin of control chip U1 are exported and low level, and power tube Q1 reopens, and works so again and again.
For the system of series connection fixed L ED lamp pearl number, LED fluorescent lamp voltage is relatively stable, if inductance is also fixing, the output current of LED fluorescent lamp is just constant.LED lamp pearl is for being connected in parallel in the utility model, and LED lamp pearl is at least two, and when one of them LED lamp pearl damage can not be used, owing to be to be connected in parallel, another LED lamp pearl also can normally be used.
Peak point current actual in the utility model rectifier raises along with the rising of input voltage, for 2 pin of the variation control chip U1 that compensates this peak point current are used for detecting input voltage, along with input voltage raises, reduce the threshold voltage value on the control chip U1 pin, the service time of power tube Q1 is just short, the electric current that flows through inductance L M1 just reduces, and has guaranteed the constant current in very wide voltage range of LED fluorescent lamp like this.
In addition, a plurality of LED lamp pearls are connected in parallel, and work alone each other, are convenient to the replacing of lamp pearl and the maintenance of LED fluorescent lamp.
With above-mentioned foundation desirable embodiment of the present utility model is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the specification, must determine its technical scope according to the claim scope.
Claims (7)
1. LED fluorescent lamp, comprise the fluorescent tube housing, and at least one lamp plate, lamp plate is provided with a plurality of LED lamp pearls that are connected in parallel, and also comprises rectifier, one end of described rectifier connects AC power, the other end connects lamp plate, and described LED lamp pearl is connected with circuit board, it is characterized in that, described rectifier comprises passive power factor correcting circuit, decompression rectifier filter circuit and decompression transducer circuit, and links to each other successively; Wherein, described passive power factor correcting circuit is connected with the first diode D1 by the first capacitor C E1, and first resistance R 1, the second diode D2 connect with second resistance R 2, and the 3rd diode D3 connects with the second capacitor C E2, formed each branch road carries out that back in parallel forms again; Described decompression rectifier filter circuit is by voltage-stabiliser tube DZ1 and the 3rd capacitor C E3 parallel connection, connect again the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 formed branch roads, and again, the 4th capacitor C E4 in parallel is formed; Described decompression transducer circuit is by control chip U1, power tube Q1, the 4th diode D4 series connection, and shunt inductance LM1 is formed again.
2. LED fluorescent lamp according to claim 1 is characterized in that: the first terminal J1 input AC 220V voltage of described rectifier, the second terminal J2 connects LED lamp pearl.
3. LED fluorescent lamp according to claim 2 is characterized in that: the alternating voltage of described the first terminal J1 input is transformed to high direct voltage by converter DB1.
4. LED fluorescent lamp according to claim 3 is characterized in that: described passive power factor correcting circuit is connected to the two ends of converter DB1.
5. LED fluorescent lamp according to claim 1, it is characterized in that: described control chip U1 gathers the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the peak point current that the tenth resistance R 10 backs parallel with one another are produced carries out constant current control by the pulse duty factor on the internal logic control power tube Q1 signal.
6. LED fluorescent lamp according to claim 5 is characterized in that: the turn-off time of described power tube Q1 is set by the 6th resistance R 6.
7. LED fluorescent lamp according to claim 5 is characterized in that: described control chip U1 is powered by decompression rectifier filter circuit, provides sampled voltage to carry out voltage compensation for 2 pin of control chip U1 simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020505031XU CN201795360U (en) | 2010-08-26 | 2010-08-26 | LED fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020505031XU CN201795360U (en) | 2010-08-26 | 2010-08-26 | LED fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201795360U true CN201795360U (en) | 2011-04-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020505031XU Expired - Fee Related CN201795360U (en) | 2010-08-26 | 2010-08-26 | LED fluorescent lamp |
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| Country | Link |
|---|---|
| CN (1) | CN201795360U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012174765A1 (en) * | 2011-06-21 | 2012-12-27 | Lai Jung Mo | Constant current controller for led lamp |
| CN103929846A (en) * | 2013-01-16 | 2014-07-16 | 硕颉科技股份有限公司 | Light-emitting diode load driving device |
| CN106856640A (en) * | 2015-12-08 | 2017-06-16 | 池州学院 | A kind of LED drive power |
| CN106879134A (en) * | 2011-07-06 | 2017-06-20 | 株式会社理光 | Lighting control circuit, the illuminating lamp using lighting control circuit and the lighting device using illuminating lamp |
-
2010
- 2010-08-26 CN CN201020505031XU patent/CN201795360U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012174765A1 (en) * | 2011-06-21 | 2012-12-27 | Lai Jung Mo | Constant current controller for led lamp |
| CN106879134A (en) * | 2011-07-06 | 2017-06-20 | 株式会社理光 | Lighting control circuit, the illuminating lamp using lighting control circuit and the lighting device using illuminating lamp |
| CN103929846A (en) * | 2013-01-16 | 2014-07-16 | 硕颉科技股份有限公司 | Light-emitting diode load driving device |
| CN106856640A (en) * | 2015-12-08 | 2017-06-16 | 池州学院 | A kind of LED drive power |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20130826 |