CN203872410U - Power supply in LED lamp tube - Google Patents
Power supply in LED lamp tube Download PDFInfo
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- CN203872410U CN203872410U CN201420277563.0U CN201420277563U CN203872410U CN 203872410 U CN203872410 U CN 203872410U CN 201420277563 U CN201420277563 U CN 201420277563U CN 203872410 U CN203872410 U CN 203872410U
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- 238000004020 luminiscence type Methods 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical group [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model discloses a power supply in an LED lamp tube. The power supply comprises a rectification voltage-stabilizing circuit which rectifies an alternating current and then outputs a DC voltage-stabilizing current to the V+ and V- pins at the first end of an LED lamp panel; and a constant-current control circuit which obtains the DC voltage-stabilizing current output by the rectification voltage-stabilizing circuit from the V+ and V- pins at the second end of the LED lamp panel, and outputs a constant DC current to the LED+ and LED- pins of the LED lamp panel. The first end of the LED lamp panel has the V+ and V- pins, and the second end also has the V+ and V- pins; the V+ pins at the two ends are in electrical connection; and the V- pins at the two ends are in electrical connection. According to the power supply in the LED lamp tube, the power supply is divided into two parts, and the power supply can be placed at the two sides in the LED lamp tube, thereby realizing the purpose of power supply miniaturization and helping to design small-size tubular LED lamps with built-in power supplies.
Description
Technical field
The application relates to a kind of LED light fixture of tubulose, particularly relates to power supply wherein.
Background technology
Fluorescent lamp (also claiming fluorescent lamp) is under electric field action, make the mercury atom in fluorescent tube constantly be provoked into excitation state from reset condition, then ground state is arrived in spontaneous transition, and gives off ultraviolet ray, and the fluorescent material of tube inner wall sends visible ray after absorbing ultraviolet radiation.Owing to being filled with mercury vapour in fluorescent tube, the fluorescent tube of therefore scrapping is comparatively serious to the pollution of environment.The fluorescent lamp of tubulose is divided into T12, T10, T8, T6, T5, T4, T3 equal-specification according to fluorescent tube caliber difference, and to be wherein 1 inch be that the T8 fluorescent tube of 25.4mm is the most common to diameter.
LED light fixture adopts light-emitting diode as light source, higher containing heavy metal Hg, luminous efficiency, longer service life, thereby become the ideal product that replaces fluorescent lamp.The LED light fixture of at present existing tubulose emerges, and has adopted the LED fluorescent tube with the fluorescent lamp of tubulose with same size.While replacing fluorescent lamp with LED light fixture, only fluorescent tube need be taken off to the LED fluorescent tube of changing same specification, and the ballast of original fluorescent lamp and starter are removed, can significantly reduce like this alternative costs, simplify replacement operation.
In the LED light fixture of existing tubulose, all comprise power supply, for civil power being changed and being powered into light-emitting diode.Some power supply, outside LED fluorescent tube, is called external power supply.Also some power supply, in LED fluorescent tube, is called built-in power.If the LED light fixture of tubulose adopts built-in power, must be by power supply miniaturization to be placed in LED fluorescent tube.
Utility model content
Technical problems to be solved in this application are to provide the power supply of the LED light fixture of the small and exquisite tubulose of a kind of volume, thereby power supply can be placed in LED fluorescent tube.
For solving the problems of the technologies described above, the power supply in the application LED fluorescent tube comprises:
---regulator rectifier circuit, by the V+ of the first end of backward AC rectification LED lamp plate, V-pin output DC voltage-stabilizing electric current;
---constant-current control circuit, obtain the DC voltage-stabilizing electric current of regulator rectifier circuit output from V+, the V-pin of the second end of LED lamp plate, export constant direct current to LED+, the LED-pin of LED lamp plate;
The first end of described LED lamp plate has V+, V-pin, and the second end also has V+, V-pin; Between the V+ pin at two ends, be electrically connected; Between the V-pin at two ends, be electrically connected.
Further, described LED lamp plate is placed on LED fluorescent tube inside, and described regulator rectifier circuit, constant-current control circuit are placed on respectively the two ends of LED fluorescent tube inside.
Further, described regulator rectifier circuit is: one in ac input end connects fuse, is parallel with adjustable resistance and electric capacity one between a pair of ac input end; The first end of the primary coil of this pair of ac input end difference connection transformer one, the first end of secondary coil; The second end of the primary coil of transformer one connects the negative pole of diode one and the positive pole of diode two simultaneously; The second end of the secondary coil of transformer one connects the negative pole of diode three and the positive pole of diode four simultaneously; The positive pole of the positive pole of diode one and diode three is connected and is connected the negative output terminal of regulator rectifier circuit; The negative pole of diode two is connected with the negative pole of diode four, both connects the positive output end of regulator rectifier circuit by inductance two, connects again the negative output terminal of regulator rectifier circuit by electric capacity two; Between described positive output end, negative output terminal, be parallel with electric capacity three.
Further, described adjustable resistance is piezo-resistance.
Further, described constant-current control circuit is: positive input terminal connects positive output end; Negative input end ground connection; Negative output terminal is by electric capacity nine ground connection; In parallel resistance ten and electric capacity eight between positive output end and negative output terminal; Described constant-current control circuit comprises comparator, and comparator has GND, DRV, CS, VDD, DSEN, COMP, NC, HV totally eight pins;
GND pin ground connection;
DRV pin connects the grid of transistor one by resistance four; The substrate of transistor one is by three resistance seven in parallel, resistance eight and the rear ground connection of resistance nine; Between the source electrode of transistor one and drain electrode, connecting diode seven; The drain electrode of transistor one connects the anode of diode six, and the negative electrode of diode six connects the positive output end of constant-current control circuit;
CS pin is by three resistance seven in parallel of cascade, resistance eight and the rear ground connection of resistance nine again after resistance five;
VDD pin, both by electric capacity four and electric capacity five ground connection in parallel, connects again the negative electrode of diode five by resistance two; The anode of diode five both connected DSEN pin by resistance three, again the first end of the primary coil of connection transformer three; The second end ground connection of the primary coil of transformer three, the first end of secondary coil connects the anode of diode six, and the second end of secondary coil connects the negative output terminal of constant-current control circuit;
DSEN pin is also by resistance six and electric capacity seven ground connection in parallel;
COMP pin is by electric capacity six ground connection;
NC pin is unsettled;
HV pin connects the positive input terminal of constant-current control circuit.
Further, described comparator is the MT7838 chip of Mei Xinsheng Science and Technology Ltd.; This chip has eight pins: GND pin is chip ground; DRV pin is that external power metal-oxide-semiconductor grid drives; CS pin is current detecting pin; VDD pin is chip power; DSEN pin is feedback pin, for inductance zero current detection; DSEN pin provides overvoltage protection simultaneously; COMP pin is the output of internal error amplifier; COMP pin connects a capacitor over the ground simultaneously and carries out frequency compensation; NC pin is unsettled; HV pin is that chip high voltage starts pin.
Further, described LED lamp plate is made up of separate luminescence component, the first wiring, the second wiring; This luminescence component is to be parallel with many branch roads between LED+, LED-pin, multiple light-emitting diodes of connecting on every branch road; Line between the V+ pin that this first wiring is described LED lamp plate two ends; Line between the V-pin that this second wiring is described LED lamp plate two ends.
The quantity of the light-emitting diode of connecting on every branch road in described luminescence component further, is identical.
Power supply is divided into two parts by the LED light fixture of the application's tubulose, thereby can be placed on the two ends of LED fluorescent tube inside, realized the object of power supply miniaturization, is conducive to the LED light fixture of the tubulose of designing the small and exquisite employing built-in power of volume.
Brief description of the drawings
Fig. 1 is the circuit theory schematic diagram of the LED light fixture of the application's tubulose;
Fig. 2, Fig. 3 are respectively the decomposition texture schematic diagrames of observing the LED light fixture of the application's tubulose from two ends;
Fig. 4 is a specific embodiment of regulator rectifier circuit;
Fig. 5 is a specific embodiment of constant-current control circuit;
Fig. 6 is a specific embodiment of luminescence component.
Description of reference numerals in figure:
10 is regulator rectifier circuit; 20 is constant-current control circuit; 30 is LED lamp plate; 40 is LED fluorescent tube; 41 is power shelf; 42 is lamp adapter assembly.
Embodiment
Refer to Fig. 1, the LED light fixture of the application's tubulose comprises on circuit structure:
---regulator rectifier circuit 10, V+, V-pin output DC voltage-stabilizing electric current by the alternating current of 220V through the first end of the backward LED lamp plate 30 of over commutation.
---constant-current control circuit 20, obtain from V+, the V-pin of the second end of LED lamp plate 30 the DC voltage-stabilizing electric current that regulator rectifier circuit 10 is exported, export constant direct current for each light-emitting diode power supply to LED+, the LED-pin of LED lamp plate 30 after treatment.
---LED lamp plate 30, its first end has V+, V-pin, and the second end has V+, V-, LED+, LED-pin.Between the V+ pin at two ends, be electrically connected by the wiring of first on LED lamp plate 30.Between the V-pin at two ends, be electrically connected by the wiring of second on LED lamp plate 30.LED+, LED-pin are connecting luminescence component.Described luminescence component comprises multiple light-emitting diodes.
The summation of the wiring of first on described regulator rectifier circuit 10, constant-current control circuit 20, LED lamp plate 30 and the second wiring is as the power supply of the LED light fixture of tubulose.
Refer to Fig. 2, this is the LED light fixture of observing the application's tubulose from first end.First in LED fluorescent tube 40, be placed with LED lamp plate 30, the length of LED lamp plate 30 is roughly identical with LED fluorescent tube 40, and Fig. 2 only represents its partial-length.Then be placed with power shelf 41, regulator rectifier circuit 10 at the first end of LED fluorescent tube 40, and regulator rectifier circuit 10 and the first end of LED lamp plate 30 are electrically connected.Finally at the first end of LED fluorescent tube 40, lamp adapter assembly 42 is installed, and lamp adapter assembly 42 and regulator rectifier circuit 10 are electrically connected.
Refer to Fig. 3, this is the LED light fixture of observing the application's tubulose from the second end.First in LED fluorescent tube 40, be placed with LED lamp plate 30, the length of LED lamp plate 30 is roughly identical with LED fluorescent tube 40, and Fig. 3 only represents its partial-length.Then be placed with power shelf 41, constant-current control circuit 20 at the second end of LED fluorescent tube 40, and constant-current control circuit 20 and the second end of LED lamp plate 30 are electrically connected.Finally at the second end of LED fluorescent tube 40, lamp adapter assembly 42 is installed, this lamp adapter assembly 42 does not need to be electrically connected with constant-current control circuit 20.
Complex chart 2, Fig. 3, power supply is divided into two roughly equal parts of volume by the LED light fixture of the application's tubulose, thereby be built in dexterously the two ends of LED fluorescent tube 40.
Refer to Fig. 4, this is a specific embodiment of regulator rectifier circuit 10.This regulator rectifier circuit 10 has the ac input end of a pair of alternating current that is used for inputting 180V～270V, also has a pair of DC output end V+, V-.An ac input end is connected with fuse F1, is parallel with adjustable resistance R1 and electric capacity one C1 between a pair of ac input end.Adjustable resistance R1 is for example piezo-resistance.The first end of the primary coil of this pair of ac input end difference connection transformer one L1, the first end of secondary coil.The second end of the primary coil of transformer one L1 connects the negative pole of diode one D1 and the positive pole of diode two D2 simultaneously.The second end of the secondary coil of transformer one L1 connects the negative pole of diode three D3 and the positive pole of diode four D4 simultaneously.The positive pole of the positive pole of diode one D1 and diode three D3 is connected and is connected the negative output terminal V-of regulator rectifier circuit 10.The negative pole of diode two D2 is connected with the negative pole of diode four D4, both connects the positive output end V+ of regulator rectifier circuit 10 by inductance two L2, connects again the negative output terminal V-of regulator rectifier circuit 10 by electric capacity two C2.Between a pair of DC output end V+, V-, be parallel with electric capacity three C3.The electric bridge that four diode D1～D4 form is for rectification, and three capacitor C 1～C3 are for voltage stabilizing.
Refer to Fig. 5, this is a specific embodiment of constant-current control circuit 20.This constant-current control circuit 20 has a pair of direct-flow input end V+, V-, also has a pair of DC output end LED+, LED-.Positive input terminal V+ connects positive output end LED+.Negative input end V-ground connection, negative output terminal LED-is by electric capacity nine C9 ground connection.In parallel resistance ten R10 and electric capacity eight C8 between positive output end LED+ and negative output terminal LED-.This constant-current control circuit 20 has adopted a comparator B1, for example, adopt the MT7838 chip of Mei Xinsheng Science and Technology Ltd..This chip has eight pins: GND pin is chip ground.DRV pin is that external power metal-oxide-semiconductor grid drives.CS pin is current detecting pin.VDD pin is chip power.DSEN pin is feedback pin, for inductance zero current detection; DSEN pin provides overvoltage protection simultaneously.COMP pin is the output of internal error amplifier; COMP pin connects a capacitor over the ground simultaneously and carries out frequency compensation.NC pin is unsettled.HV pin is that chip high voltage starts pin.
In the constant-current control circuit 20 shown in Fig. 5, the GND pin ground connection of comparator B1, DRV pin connects the grid of transistor one M1 by resistance four R4.The substrate of transistor one M1 by three resistance seven R7 in parallel, resistance eight R8 and resistance nine R9 after ground connection.Between the source electrode of transistor one M1 and drain electrode, connecting diode seven D7.The drain electrode of transistor one M1 connects the anode of diode six D6, and the negative electrode of diode six D6 connects the positive output end LED+ of constant-current control circuit 20.CS pin is by ground connection after resistance five R5 cascade three resistance seven R7 in parallel, resistance eight R8 and resistance nine R9.VDD pin, on the one hand by electric capacity four C4 and electric capacity five C5 ground connection in parallel, connects the negative electrode of diode five D5 on the other hand by resistance two R2.The anode of diode five D5 connects the DSEN pin of comparator B1, the first end of the primary coil of connection transformer three L3 on the other hand on the one hand by resistance three R3.The second end ground connection of the primary coil of transformer three L3.The first end of the secondary coil of transformer three L3 connects the anode of diode six D6.The second end of the secondary coil of transformer three L3 connects the negative output terminal LED-of constant-current control circuit 20.DSEN pin is also by resistance six R6 and electric capacity seven C7 ground connection in parallel.COMP pin is by electric capacity six C6 ground connection.NC pin is unsettled.HV pin meets positive input terminal V+.
Refer to Fig. 6, this is a specific embodiment of luminescence component.Separate luminescence component, the first wiring, the second wiring have formed LED lamp plate 30 jointly.This luminescence component only has a pair of link LED+, LED-.Between this pair of link LED+, LED-, be parallel with many branch roads, multiple light-emitting diodes of connecting on every branch road.The quantity of the light-emitting diode of for example, connecting on every branch road is identical.
These are only the application's preferred embodiment, and be not used in restriction the application.For a person skilled in the art, the application can have various modifications and variations.All within the application's spirit and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in the application's protection range.
Claims (8)
1. the power supply in LED fluorescent tube, is characterized in that, comprising:
---regulator rectifier circuit, by the V+ of the first end of backward AC rectification LED lamp plate, V-pin output DC voltage-stabilizing electric current;
---constant-current control circuit, obtain the DC voltage-stabilizing electric current of regulator rectifier circuit output from V+, the V-pin of the second end of LED lamp plate, export constant direct current to LED+, the LED-pin of LED lamp plate;
The first end of described LED lamp plate has V+, V-pin, and the second end also has V+, V-pin; Between the V+ pin at two ends, be electrically connected; Between the V-pin at two ends, be electrically connected.
2. the power supply in LED fluorescent tube according to claim 1, is characterized in that, described LED lamp plate is placed on LED fluorescent tube inside, and described regulator rectifier circuit, constant-current control circuit are placed on respectively the two ends of LED fluorescent tube inside.
3. the power supply in LED fluorescent tube according to claim 1, is characterized in that, described regulator rectifier circuit is: one in ac input end connects fuse, is parallel with adjustable resistance and electric capacity one between a pair of ac input end; The first end of the primary coil of this pair of ac input end difference connection transformer one, the first end of secondary coil; The second end of the primary coil of transformer one connects the negative pole of diode one and the positive pole of diode two simultaneously; The second end of the secondary coil of transformer one connects the negative pole of diode three and the positive pole of diode four simultaneously; The positive pole of the positive pole of diode one and diode three is connected and is connected the negative output terminal of regulator rectifier circuit; The negative pole of diode two is connected with the negative pole of diode four, both connects the positive output end of regulator rectifier circuit by inductance two, connects again the negative output terminal of regulator rectifier circuit by electric capacity two; Between described positive output end, negative output terminal, be parallel with electric capacity three.
4. the power supply in LED fluorescent tube according to claim 3, is characterized in that, described adjustable resistance is piezo-resistance.
5. the power supply in LED fluorescent tube according to claim 1, is characterized in that, described constant-current control circuit is: positive input terminal connects positive output end; Negative input end ground connection; Negative output terminal is by electric capacity nine ground connection; In parallel resistance ten and electric capacity eight between positive output end and negative output terminal; Described constant-current control circuit comprises comparator, and comparator has GND, DRV, CS, VDD, DSEN, COMP, NC, HV totally eight pins;
GND pin ground connection;
DRV pin connects the grid of transistor one by resistance four; The substrate of transistor one is by three resistance seven in parallel, resistance eight and the rear ground connection of resistance nine; Between the source electrode of transistor one and drain electrode, connecting diode seven; The drain electrode of transistor one connects the anode of diode six, and the negative electrode of diode six connects the positive output end of constant-current control circuit;
CS pin is by three resistance seven in parallel of cascade, resistance eight and the rear ground connection of resistance nine again after resistance five;
VDD pin, both by electric capacity four and electric capacity five ground connection in parallel, connects again the negative electrode of diode five by resistance two; The anode of diode five both connected DSEN pin by resistance three, again the first end of the primary coil of connection transformer three; The second end ground connection of the primary coil of transformer three, the first end of secondary coil connects the anode of diode six, and the second end of secondary coil connects the negative output terminal of constant-current control circuit;
DSEN pin is also by resistance six and electric capacity seven ground connection in parallel;
COMP pin is by electric capacity six ground connection;
NC pin is unsettled;
HV pin connects the positive input terminal of constant-current control circuit.
6. the power supply in LED fluorescent tube according to claim 5, is characterized in that, described comparator is the MT7838 chip of Mei Xinsheng Science and Technology Ltd.; This chip has eight pins: GND pin is chip ground; DRV pin is that external power metal-oxide-semiconductor grid drives; CS pin is current detecting pin; VDD pin is chip power; DSEN pin is feedback pin, for inductance zero current detection; DSEN pin provides overvoltage protection simultaneously; COMP pin is the output of internal error amplifier; COMP pin connects a capacitor over the ground simultaneously and carries out frequency compensation; NC pin is unsettled; HV pin is that chip high voltage starts pin.
7. the power supply in LED fluorescent tube according to claim 5, is characterized in that, described LED lamp plate is made up of separate luminescence component, the first wiring, the second wiring; This luminescence component is to be parallel with many branch roads between LED+, LED-pin, multiple light-emitting diodes of connecting on every branch road; Line between the V+ pin that this first wiring is described LED lamp plate two ends; Line between the V-pin that this second wiring is described LED lamp plate two ends.
8. the power supply in LED fluorescent tube according to claim 7, is characterized in that, the quantity of the light-emitting diode of connecting on every branch road in described luminescence component is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420277563.0U CN203872410U (en) | 2014-05-28 | 2014-05-28 | Power supply in LED lamp tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420277563.0U CN203872410U (en) | 2014-05-28 | 2014-05-28 | Power supply in LED lamp tube |
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| Publication Number | Publication Date |
|---|---|
| CN203872410U true CN203872410U (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420277563.0U Expired - Lifetime CN203872410U (en) | 2014-05-28 | 2014-05-28 | Power supply in LED lamp tube |
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| Country | Link |
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| CN (1) | CN203872410U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245111A (en) * | 2015-11-13 | 2016-01-13 | 营口营成电子设备有限公司 | Control system of high direct voltage output voltage stabilization and constant current source |
-
2014
- 2014-05-28 CN CN201420277563.0U patent/CN203872410U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245111A (en) * | 2015-11-13 | 2016-01-13 | 营口营成电子设备有限公司 | Control system of high direct voltage output voltage stabilization and constant current source |
| CN105245111B (en) * | 2015-11-13 | 2018-08-17 | 营口营成电子设备有限公司 | A kind of control system of high direct voltage output voltage stabilizing and constant-current supply |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING YANDONG MICROELECTRNIC CO.,LTD. Free format text: FORMER OWNER: BEIJING JILE ELECTRONICS GROUP CO., LTD. Effective date: 20141201 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100016 CHAOYANG, BEIJING TO: 100015 CHAOYANG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20141201 Address after: 100015 Beijing city Chaoyang District Dongzhimen West eight room Wanhong No. 2 West Street Patentee after: BEIJING YANDONG MICROELECTRONIC Co.,Ltd. Address before: 100016 No. 5 South Jiuxianqiao Road, Beijing, Chaoyang District Patentee before: BEIJING JILE ELECTRONICS GROUP Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20141008 |
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| CX01 | Expiry of patent term |