CN204539547U - A kind of LED lamp tube - Google Patents
A kind of LED lamp tube Download PDFInfo
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- CN204539547U CN204539547U CN201520105436.7U CN201520105436U CN204539547U CN 204539547 U CN204539547 U CN 204539547U CN 201520105436 U CN201520105436 U CN 201520105436U CN 204539547 U CN204539547 U CN 204539547U
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Abstract
A kind of LED lamp tube based on electric ballast, comprise load circuit, AC/DC change-over circuit and compatible electronic ballast power circuit, described load circuit comprises input A, B and input C, D, the output of AC/DC change-over circuit is connected with input A, B of load circuit, and compatible electronic ballast power circuit output end is connected with input C, D of load circuit; Described compatible electronic ballast power circuit comprises rectifier bridge, and input L2 is connected with the input of rectifier bridge by electric capacity CX2, CX3 of series connection mutually, and input N is connected with the input of rectifier bridge by electric capacity CX4, CX5 of series connection mutually; The output of rectifier bridge is connected with input C, D of load circuit.Two electric capacity of mutual series connection have the effect of current limliting, because the input current of external drive power supply is comparatively large, arranges current limiting capacitance can effectively protect the LED in load circuit not to be burned by the input being located at load circuit.
Description
Technical field
The utility model relates to field of LED illumination, especially a kind of LED lamp tube.
Background technology
LED lamp tube is also commonly called as LED light pipe, LED fluorescent lamp tube, LED daylight lamp, and its light source adopts LED as luminous element.Traditional fluorescent tube is also known as fluorescent lamp, and respectively there is a filament at lamp two ends, is filled with the argon of trace and thin mercury vapour, tube inner wall scribbles fluorescent material in fluorescent tube, sends ultraviolet, make fluorescent material send visible ray during gas conduction between two filaments.Due to containing heavy metal pollutants " mercury ", make the fluorescent tube scrapped very serious to the pollution of environment.And LED lamp tube adopts light-emitting diode as light source, light efficiency is higher, more energy-conservation, longer service life, and more environmental protection, becomes the most ideal product that the current stage replaces fluorescent tube.LED lamp tube circuit is generally fairly simple, mainly comprises LED load circuit and DC power supply.Tradition is contained to the fluorescent tube of electric ballast, if want, LED load circuit is applied on traditional tube support, because power supply is constant, then need to make corresponding change to LED load circuit, because the output voltage of traditional tube support is larger, therefore need the number or the connected mode that adjust LED in LED load circuit, with time single led lamp both end voltage in the scope be applicable to, fluorescent tube just can be made normally to work.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of LED lamp tube, at input by increasing current limiting capacitance, is not burned to protect load.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of LED lamp tube, comprises load circuit, AC/DC change-over circuit and compatible electronic ballast power circuit; Described AC/DC change-over circuit comprises input L1, N, and compatible electronic ballast power circuit comprises input L2, and another input is connected with the input N of AC/DC change-over circuit; During the input of access electric ballast, input L1 and input N short circuit are as inputting one end, and input L2 is as the input other end; During direct access civil power input, input L1 and input N is respectively as inputting two ends, and input L2 is unsettled not to be accessed; Described load circuit comprises input A, B and input C, D, and the output of AC/DC change-over circuit is connected with input A, B of load circuit and connects, and compatible electronic ballast power circuit output end is connected with input C, D of load circuit; Described compatible electronic ballast power circuit comprises rectifier bridge, and input L2 is connected with the input of rectifier bridge by electric capacity CX2, CX3 of series connection mutually, and input N is connected with the input of rectifier bridge by electric capacity CX4, CX5 of series connection mutually; The output of rectifier bridge is connected with input C, D of load circuit.Two electric capacity of mutual series connection have the effect of current limliting, because the input current of external drive power supply is comparatively large, arranges current limiting capacitance can effectively protect the LED in load circuit not to be burned by the input being located at load circuit.In addition, the current limiting capacitance of different size can be selected according to the resistance of the size of foreign current and load.
As improvement, describedly between input A, B, be provided with some LED branch roads parallel with one another, described LED branch road comprises the first diode, LED, second diode of connecting successively, the positive pole of the first diode is connected with input A, the negative pole of the second diode is connected with input B, the 3rd diode is provided with between described LED branch road, the positive pole of described 3rd diode is connected with the LED negative pole of a wherein LED branch road, and the negative pole of the 3rd diode is connected with the LED positive pole of another LED branch road; LED in load circuit is mutually together in series by described 3rd diode and forms LED strip receipts or other documents in duplicate unit, and described input C, D are connected to the two ends of LED strip receipts or other documents in duplicate unit.
The beneficial effect that the utility model is compared with prior art brought is:
Two electric capacity of mutual series connection have the effect of current limliting, because the input current of external drive power supply is comparatively large, arranges current limiting capacitance can effectively protect the LED in load circuit not to be burned by the input being located at load circuit; In addition, the current limiting capacitance of different size can be selected according to the resistance of the size of foreign current and load.
Accompanying drawing explanation
Fig. 1 is LED lamp tube overall circuit schematic diagram.
Fig. 2 is load circuit figure.
Fig. 3 is anti-stroboscopic circuit diagram.
Fig. 4 is compatible electronic ballast power circuit diagram.
Embodiment
Below in conjunction with Figure of description, the utility model is described in further detail.
As shown in Figure 1, a kind of LED lamp tube based on electric ballast, comprises load circuit, AC/DC change-over circuit, anti-stroboscopic circuit, separates circuit and compatible electronic ballast power circuit; Described AC/DC change-over circuit comprises input L1, N, and its output is connected with the input of anti-stroboscopic circuit, and compatible electronic ballast power circuit comprises input L2, and another input is connected with the input N of AC/DC change-over circuit; During the input of access electric ballast, input L1 and input N short circuit are as inputting one end, and input L2 is as the input other end; During direct access civil power input, input L1 and input N is respectively as inputting two ends, and input L2 is unsettled not to be accessed.
As shown in Figure 2, described load circuit comprises input A, B and input C, D, describedly between input A, B, be provided with three LED branch roads parallel with one another, first LED branch road comprises the first diode D13, LED 1, the second diode D16 that connect successively, the positive pole of the first diode D13 is connected with input A, and the negative pole of the second diode D16 is connected with input B; Second LED branch road comprises the first diode D14, LED 2, the second diode D17 that connect successively, and the positive pole of the first diode D14 is connected with input A, and the negative pole of the second diode D17 is connected with output B; 3rd LED branch road comprises the first diode D15, LED 3, the second diode D18 that connect successively, and the positive pole of the first diode D15 is connected with input A, and the negative pole of the second diode D18 is connected with input B.Be provided with the 3rd diode D19 between first LED branch road and the second LED branch road, the positive pole of the 3rd diode D19 is connected with the negative pole of LED 1, and the negative pole of the 3rd diode D19 is connected with the positive pole of LED 1; Be provided with the 3rd diode D20 between second LED branch road and the 3rd LED branch road, the positive pole of the 3rd diode D20 is connected with the negative pole of LED 2, and the negative pole of the 3rd diode D20 is connected with the positive pole of LED3.LED in load circuit is mutually together in series by described 3rd diode and forms LED strip receipts or other documents in duplicate unit, and described input C, D are connected to the two ends of LED strip receipts or other documents in duplicate unit.Load circuit can also expand more LED branch road, can not connect the 3rd diode between some LED branch road, using as independently parallel branch.By arranging the 3rd diode between adjacent LED lamp branch road in load circuit, the LED of adjacent LED lamp branch road is formed be connected in series, parallel relationship again between cooperated with LED lamp branch road, thus change the connection in series-parallel relation of LED in whole LED load circuit, to change the both end voltage of single led lamp, its load circuit is enable to adapt to different voltage inputs.Load circuit arranges two inputs, and one coordinates with electric ballast, and another one is directly connected with civil power; When load to be connected with electric ballast power time, LED load can with the electric ballast of traditional tube with the use of; Because the LED life-span is longer than the electric ballast life-span, if electric ballast breaks down, change the connection of LED load, LED lamp tube can be made normally to use.
As shown in Figure 4, described compatible electronic ballast power circuit comprises rectifier bridge, and input L2 is connected with the input of rectifier bridge by electric capacity CX2, CX3 of series connection mutually, and input N is connected with the input of rectifier bridge by electric capacity CX4, CX5 of series connection mutually; The output of rectifier bridge is connected with input C, D of load circuit.The electric capacity of mutual series connection has metering function, because the input current of external drive power supply is comparatively large, arranges current limiting capacitance can effectively protect the LED in load circuit not to be burned by the input being located at load circuit.In addition, the current limiting capacitance of different size can be selected according to the resistance of the size of foreign current and load.
As shown in Figure 3, anti-stroboscopic circuit comprises positive terminal V+, negative pole end V-, removes stroboscopic chip U2 and metal-oxide-semiconductor Q1, described positive terminal V+ is connected with LED load positive pole by diode D21, described positive terminal V+ is connected with removing first pin 1 of stroboscopic chip U2 by resistance R27, the resistance R19 of series connection mutually, the 6th pin 6 of stroboscopic chip U2 is gone to be connected with the drain electrode of metal-oxide-semiconductor Q1 by resistance R20, go the 5th pin 5 of stroboscopic chip U2 to be connected with the source electrode of metal-oxide-semiconductor Q1, go the 4th pin 4 of stroboscopic chip U2 to be connected with the grid of metal-oxide-semiconductor Q1 by resistance R15; The grid of metal-oxide-semiconductor Q1 is connected with negative pole end V-by electric capacity C11, and the source electrode of metal-oxide-semiconductor Q1 is connected with negative pole end V-by resistance R22, R23, R24 parallel with one another, and the drain electrode of metal-oxide-semiconductor Q1 is connected with LED load negative pole.Described first pin 1 of stroboscopic chip U2 that goes is by being connected with negative pole end V-after voltage stabilizing didoe ZD1 parallel with one another, resistance R16, electric capacity C9.Described second pin 2 of stroboscopic chip U2 that goes is connected with negative pole end V-.Described the 3rd pin 3 of stroboscopic chip U2 that goes is connected with negative pole end V-by electric capacity C10 parallel with one another, resistance R11.
The described circuit that separates comprises metal-oxide-semiconductor Q2, diode D21, electric capacity C12, the grid of metal-oxide-semiconductor is connected with the input A of load circuit by diode D21, the drain electrode of metal-oxide-semiconductor is connected with the input B of load circuit, the anti-output of stroboscopic circuit is connected with the source electrode of metal-oxide-semiconductor, is provided with voltage stabilizing didoe ZD2 parallel with one another, resistance R30, electric capacity C13 between the grid of metal-oxide-semiconductor and source electrode; Electric capacity C12 two ends are connected with load circuit input A, B, and resistance R33, R34 of being provided with series connection are mutually in parallel with electric capacity C12.
Claims (2)
1. a LED lamp tube, comprises load circuit, AC/DC change-over circuit and compatible electronic ballast power circuit; It is characterized in that: described AC/DC change-over circuit comprises input L1, N, compatible electronic ballast power circuit comprises input L2, and another input is connected with the input N of AC/DC change-over circuit; During the input of access electric ballast, input L1 and input N short circuit are as inputting one end, and input L2 is as the input other end; During direct access civil power input, input L1 and input N is respectively as inputting two ends, and input L2 is unsettled not to be accessed; Described load circuit comprises input A, B and input C, D, and the output of AC/DC change-over circuit is connected with input A, B of load circuit and connects, and compatible electronic ballast power circuit output end is connected with input C, D of load circuit; Described compatible electronic ballast power circuit comprises rectifier bridge, and input L2 is connected with the input of rectifier bridge by electric capacity CX2, CX3 of series connection mutually, and input N is connected with the input of rectifier bridge by electric capacity CX4, CX5 of series connection mutually; The output of rectifier bridge is connected with input C, D of load circuit.
2. a kind of LED lamp tube according to claim 1, it is characterized in that: describedly between input A, B, be provided with some LED branch roads parallel with one another, described LED branch road comprises the first diode, LED, second diode of connecting successively, the positive pole of the first diode is connected with input A, the negative pole of the second diode is connected with input B, the 3rd diode is provided with between described LED branch road, the positive pole of described 3rd diode is connected with the LED negative pole of a wherein LED branch road, and the negative pole of the 3rd diode is connected with the LED positive pole of another LED branch road; LED in load circuit is mutually together in series by described 3rd diode and forms LED strip receipts or other documents in duplicate unit, and described input C, D are connected to the two ends of LED strip receipts or other documents in duplicate unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520105436.7U CN204539547U (en) | 2015-02-13 | 2015-02-13 | A kind of LED lamp tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520105436.7U CN204539547U (en) | 2015-02-13 | 2015-02-13 | A kind of LED lamp tube |
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| Publication Number | Publication Date |
|---|---|
| CN204539547U true CN204539547U (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520105436.7U Expired - Fee Related CN204539547U (en) | 2015-02-13 | 2015-02-13 | A kind of LED lamp tube |
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| CN (1) | CN204539547U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108521699A (en) * | 2018-05-31 | 2018-09-11 | 厦门佰明光电股份有限公司 | There are the LED drive circuit and working method of residual current protection and compatible ballast |
-
2015
- 2015-02-13 CN CN201520105436.7U patent/CN204539547U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108521699A (en) * | 2018-05-31 | 2018-09-11 | 厦门佰明光电股份有限公司 | There are the LED drive circuit and working method of residual current protection and compatible ballast |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 510800 Guangzhou, Huadu District, Huadu District, Guangdong, SAST Road, No. 1, room No. 302 Patentee after: GUANGZHOU LEDIA LIGHTING Co.,Ltd. Address before: 510800 Guangdong, Huadu District, Xinhua Street, commercial road, room No. 350, room 1, No. Patentee before: GUANGZHOU LEDIA LIGHTING TECHNOLOGY Co.,Ltd. |
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| 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: 20150805 Termination date: 20220213 |