CN203632922U - LED lamp flashing circuit - Google Patents
LED lamp flashing circuit Download PDFInfo
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- CN203632922U CN203632922U CN201320748650.5U CN201320748650U CN203632922U CN 203632922 U CN203632922 U CN 203632922U CN 201320748650 U CN201320748650 U CN 201320748650U CN 203632922 U CN203632922 U CN 203632922U
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Abstract
The utility model relates to an LED lamp flashing circuit which allows LED lamps to flash. The LED lamp flashing circuit comprises a first power supply output branch, a second power supply output branch, an LED lamp string circuit and a flashing control unit, wherein a DC power supply outputs an AC rectangular wave current to the LED lamp string circuit after being subjected to the conversion through the first power supply output branch, the second power supply output branch and the flashing control unit, thus LED lamps in the forward branch and LED lamps in the backward branch light on alternatively to form the flashing effect. The LED lamp string circuit can be connected by using only two leads to save one lead, thus the electric wire with two core wires is required, the cost is reduced, and the LED lamp strings can be more conveniently produced, machined and arranged.
Description
Technical field
The utility model relates to a kind of LED lamp flashing circuit, is specifically related to a kind of LED lamp flashing circuit of the LED of allowing lamp flicker.
Background technology
When article or space are decorated, flash lamp string is the decorative article of often using, for example, flash lamp string is decorated on Christmas tree, on the wall on the signboard of StoreFront or room.LED lamp is the light fixture that flash lamp string is conventional, the existing LED lamp flashing circuit that allows LED lamp in flash lamp string replace on and off to reach the effect of flicker, as shown in Figure 1, two groups of LED lamp strings are all received DC power supply, two groups of LED lamp strings wherein one end are connected to respectively the wherein utmost point of DC power supply by K switch 1 and K2, by control switch K1 and K2 alternate conduction with disconnect the alternately on and off that realize two groups of LED lamp strings, like this, two groups of LED lamp strings need at least three wires to be connected to the two poles of the earth of DC power supply altogether, one end of two groups of LED lamp strings is connected to a utmost point of DC power supply by a wire, the other end of two groups of LED lamp strings is connected to respectively another utmost point of DC power supply via K switch 1 and K2 by all the other two wires, therefore connect the electric wire that LED lamp string will use at least three heart yearns, cost is higher.
Summary of the invention
The purpose of this utility model is to provide one can save a wire, and connection LED lamp string only need use the LED lamp flashing circuit of the electric wire of two heart yearns.
Carry out the on and off of driving LED lamp string by the alternative DC power supply of ac square wave power supply, adjust the polar orientation of LED lamp in LED lamp string simultaneously, the polar orientation of part LED lamp is forward, the polarity of remainder LED lamp is that oppositely the opposite polarity LED lamp of two parts is connected in the two ends of ac square wave power supply in parallel.The LED lamp that when ac square wave power supply output forward current, polar orientation is forward is bright, and polar orientation is that reverse LED lamp goes out; When ac square wave power supply output reverse current, polar orientation is that reverse LED lamp is bright, and the LED lamp that polar orientation is forward goes out.
For achieving the above object, the utility model provides following technical scheme.
LED lamp flashing circuit, comprise the first power supply output branch road, second source output branch road and LED lamp string circuit, the first power supply output branch road comprises the first switch element and the second switch element that are connected in series, second source output branch road comprises the 3rd switch element and the 4th switch element that are connected in series, after the first power supply output branch road and second source output branch circuit parallel connection, be connected between the positive pole and negative pole of power supply, the first switch element and the 3rd switch element connect positive source, second switch element and the 4th switch element connect power cathode, the contact of the first switch element and second switch element is the first power output end, the contact of the 3rd switch element and the 4th switch element is second source output, LED lamp string circuit comprises at least one forward branch road and at least one reverse branch road, every forward branch road and every reverse branch road are all in series with at least one LED lamp, the polar orientation of the LED lamp in every forward branch road is forward, the polar orientation of the LED lamp in every reverse branch road is oppositely, every forward branch road and every reverse branch road are all connected between the first power output end and second source output, the positive pole of the LED lamp in every forward branch road is connected with the first power output end, the positive pole of the LED lamp in every reverse branch road is connected with second source output, this flashing circuit also comprise for control the first switch element, second switch element, the 3rd switch element and the 4th switch element closed or disconnect so that the first power output end and second source output to the flicker control unit of LED lamp string circuit output AC square wave current, the first switch element and the 4th switch element synchronizing close or disconnection, second switch element and the 3rd switch element synchronizing close or disconnection, the first switch element, second switch element, the 3rd switch element and the 4th switch element closure when different.
The forward branch road and the reverse branch road output AC square wave current that cooperatively interact in LED lamp string circuit by the first power supply output branch road, second source output branch road and flicker control unit, thereby drive the LED lamp in LED lamp and the reverse branch road in forward branch road to replace on and off, reach the effect that allows LED lamp glimmer.Connection LED lamp string circuit only needs two wires, saves a wire, therefore only needs to use the electric wire of two heart yearns, has reduced cost, and production and processing LED lamp string and layout LED lamp string are also convenient.
Wherein, the first switch element, second switch element, the 3rd switch element and the 4th switch element are respectively switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4, switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 include two conduction terminal and one for controlling the control end of conducting between described two conduction terminal or cut-off, two conduction terminal series connection of two conduction terminal of switching tube Q1 and switching tube Q2, two conduction terminal of switching tube Q3 and two conduction terminal series connection of switching tube Q4.
Wherein, the control end of switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 is all connected with flicker control unit.Or the control end of switching tube Q2 and switching tube Q4 is all connected with flicker control unit, the control end of switching tube Q1 is connected in the contact of switching tube Q3 and switching tube Q4, and the control end of switching tube Q3 is connected in the contact of switching tube Q1 and switching tube Q2.
Wherein, switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 are triode, and described two conduction terminal are respectively the collector and emitter of triode, the base stage that described control end is triode.Or switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 are field effect transistor, described two conduction terminal are respectively source electrode and the drain electrode of field effect transistor, the grid that described control end is field effect transistor.
Wherein, flicker control unit is based on chip microcontroller, and particularly, described single-chip microcomputer is 8 single-chip microcomputers.
Owing to can, to mcu programming, being realized switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 are carried out to various control by various programs, so, it is of all shapes and colors that the LED lamp in LED lamp string glimmers.In addition, adopt 8 single-chip microcomputers, compare the single-chip microcomputer that adopts 16 or 32, can reduce costs.
Flicker control unit also comprises the memory IC for storing data, and memory IC is connected with described single-chip microcomputer, and particularly, the model of described memory IC is 24C01 or 24C02.
Adopt memory IC to store data, even LED lamp flashing circuit of the present utility model accident power-off in running, the data of single-chip microcomputer also can not be lost, and again, after energising, can reset to the flashing function before power-off, reset without user.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of existing LED lamp flashing circuit.
Fig. 2 is the circuit theory diagrams of the LED lamp flashing circuit of specific embodiment of the utility model.
Reference numeral comprises: the first power supply output branch road 1, second source output branch road 2, LED lamp string circuit 3, forward branch road 31, reverse branch road 32.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
As shown in Figure 2, the LED lamp flashing circuit of the present embodiment comprises the first power supply output branch road 1, second source output branch road 2, LED lamp string circuit 3 and flicker control unit, the first power supply output branch road 1 comprises switching tube Q1 and switching tube Q2, two conduction terminal series connection of two conduction terminal of switching tube Q1 and switching tube Q2, second source output branch road 2 comprises switching tube Q3 and switching tube Q4, two conduction terminal series connection of two conduction terminal of switching tube Q3 and switching tube Q4, after the first power supply output branch road 1 and 2 parallel connections of second source output branch road, be connected between the positive pole and negative pole of power supply, the control end of switching tube Q1 is connected in the contact of switching tube Q3 and switching tube Q4, the control end of switching tube Q3 is connected in the contact of switching tube Q1 and switching tube Q2, the control end of switching tube Q2 and switching tube Q4 is all connected with flicker control unit, the contact of switching tube Q1 and switching tube Q2 is the first power output end, the contact of switching tube Q3 and switching tube Q4 is second source output.In the present embodiment, switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 are triode, and described two conduction terminal are respectively the collector and emitter of triode, the base stage that described control end is triode.LED lamp string circuit 3 comprises a forward branch road 31 and a reverse branch road 32, forward branch road 31 and oppositely branch road 32 are respectively in series with three LED lamps, the polar orientation of the LED lamp in forward branch road 31 is forward, oppositely the polar orientation of the LED lamp in branch road 32 is oppositely, after forward branch road 31 and reverse branch road 32 parallel connections, be connected between the first power output end and second source output, wherein the positive pole of the LED lamp in forward branch road 31 is connected with the first power output end, and oppositely the positive pole of the LED lamp in branch road 32 is connected with second source output.
Flicker control unit can be made up of single-chip microcomputer and tandem circuit thereof, also can be formed by other devices or circuit, the effect of flicker control unit is control switch pipe Q1, switching tube Q2, switching tube Q3 and switching tube Q4 conducting or cut-off so that the first power output end and second source output to LED lamp string circuit 3 output AC square wave currents, wherein, switching tube Q1 and the synchronous conducting of switching tube Q4 or cut-off, switching tube Q2 and the synchronous conducting of switching tube Q3 or cut-off, switching tube Q1, switching tube Q2, conducting when switching tube Q3 is different with switching tube Q4, switching tube Q2 and switching tube Q4 alternate conduction.
When flicker control unit is during only to switching tube Q2 transmitted signal, switching tube Q2 conducting, Simultaneous Switching pipe Q3 also can conducting, switching tube Q1 and switching tube Q4 cut-off, now the first power output end is received power cathode, second source output is received positive source, and oppositely the LED lamp of branch road 32 is bright, and the LED lamp of forward branch road 31 goes out; When flicker control unit is during only to switching tube Q4 transmitted signal, switching tube Q4 conducting, Simultaneous Switching pipe Q1 also can conducting, switching tube Q2 and switching tube Q3 cut-off, now the first power output end is received positive source, second source output is received power cathode, and the LED lamp of forward branch road 31 is bright, and oppositely the LED lamp of branch road 32 goes out.Flicker control unit, alternately to switching tube Q2 and switching tube Q4 transmitted signal, just can allow the LED lamp of forward branch road 31 and the LED lamp of reverse branch road 32 alternately bright.Can also arrange flicker control unit, to control the bright time of LED lamp of forward branch road 31 and reverse branch road 32.
As mentioned above, DC power supply is through the backward LED lamp string circuit 3 output AC square wave currents of conversion of the first power supply output branch road 1, second source output branch road 2 and flicker control unit, thereby make the LED lamp of forward branch road 31 and the LED lamp of reverse branch road 32 alternately bright, form the effect of flicker.Two wires of connection 3 need of LED lamp string circuit, save a wire compared to existing technology, therefore only need to use the electric wire of two heart yearns, have saved cost, and production and processing LED lamp string and layout LED lamp string are also convenient.Grow in arrangement length LED lamp string time, such as arranging LED lamp string on Christmas tree or the LED lamp string on room wall, can be cost-saving to a greater degree.
Wherein, flicker control unit is based on chip microcontroller, and particularly, described single-chip microcomputer is 8 single-chip microcomputers.Owing to can, to mcu programming, being realized switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 are carried out to various control by various programs, so, it is of all shapes and colors that the LED lamp in LED lamp string 3 glimmers.In addition, adopt 8 single-chip microcomputers, compare the single-chip microcomputer that adopts 16 or 32, can reduce costs.
Flicker control unit also comprises the memory IC for storing data, and memory IC is connected with described single-chip microcomputer, and particularly, the model of described memory IC is 24C01 or 24C02.Adopt memory IC to store data, even LED lamp flashing circuit of the present utility model accident power-off in running, the data of single-chip microcomputer also can not be lost, and again, after energising, can reset to the flashing function before power-off, reset without user.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not restriction to the utility model protection range; although the utility model has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement the technical solution of the utility model, and not depart from essence and the scope of technical solutions of the utility model.
Claims (15)
1.LED lamp flashing circuit, it is characterized in that: comprise the first power supply output branch road, second source output branch road and LED lamp string circuit, the first power supply output branch road comprises the first switch element and the second switch element that are connected in series, second source output branch road comprises the 3rd switch element and the 4th switch element that are connected in series, after the first power supply output branch road and second source output branch circuit parallel connection, be connected between the positive pole and negative pole of power supply, the first switch element and the 3rd switch element connect positive source, second switch element and the 4th switch element connect power cathode, the contact of the first switch element and second switch element is the first power output end, the contact of the 3rd switch element and the 4th switch element is second source output, LED lamp string circuit comprises at least one forward branch road and at least one reverse branch road, every forward branch road and every reverse branch road are all in series with at least one LED lamp, the polar orientation of the LED lamp in every forward branch road is forward, the polar orientation of the LED lamp in every reverse branch road is oppositely, every forward branch road and every reverse branch road are all connected between the first power output end and second source output, the positive pole of the LED lamp in every forward branch road is connected with the first power output end, the positive pole of the LED lamp in every reverse branch road is connected with second source output, this flashing circuit also comprise for control the first switch element, second switch element, the 3rd switch element and the 4th switch element closed or disconnect so that the first power output end and second source output to the flicker control unit of LED lamp string circuit output AC square wave current, the first switch element and the 4th switch element synchronizing close or disconnection, second switch element and the 3rd switch element synchronizing close or disconnection, the first switch element, second switch element, the 3rd switch element and the 4th switch element closure when different.
2. LED lamp flashing circuit according to claim 1, it is characterized in that: the first switch element, second switch element, the 3rd switch element and the 4th switch element are respectively switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4, switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 include two conduction terminal and one for controlling the control end of conducting between described two conduction terminal or cut-off, two conduction terminal series connection of two conduction terminal of switching tube Q1 and switching tube Q2, two conduction terminal series connection of two conduction terminal of switching tube Q3 and switching tube Q4.
3. LED lamp flashing circuit according to claim 2, is characterized in that: the control end of switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 is all connected with flicker control unit.
4. LED lamp flashing circuit according to claim 2, it is characterized in that: the control end of switching tube Q2 and switching tube Q4 is all connected with flicker control unit, the control end of switching tube Q1 is connected in the contact of switching tube Q3 and switching tube Q4, and the control end of switching tube Q3 is connected in the contact of switching tube Q1 and switching tube Q2.
5. according to the LED lamp flashing circuit described in claim 2 ~ 4 any one, it is characterized in that: switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 are triode, described two conduction terminal are respectively the collector and emitter of triode, the base stage that described control end is triode.
6. according to the LED lamp flashing circuit described in claim 2 ~ 4 any one, it is characterized in that: switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 are field effect transistor, described two conduction terminal are respectively source electrode and the drain electrode of field effect transistor, the grid that described control end is field effect transistor.
7. according to the LED lamp flashing circuit described in claim 1 ~ 4 any one, it is characterized in that: flicker control unit is based on chip microcontroller.
8. LED lamp flashing circuit according to claim 7, is characterized in that: described single-chip microcomputer is 8 single-chip microcomputers.
9. LED lamp flashing circuit according to claim 7, is characterized in that: flicker control unit also comprises the memory IC for storing data, and memory IC is connected with described single-chip microcomputer.
10. LED lamp flashing circuit according to claim 9, is characterized in that: the model of described memory IC is 24C01 or 24C02.
11. LED lamp flashing circuits according to claim 5, is characterized in that: flicker control unit is based on chip microcontroller.
12. LED lamp flashing circuits according to claim 6, is characterized in that: flicker control unit is based on chip microcontroller.
13. according to the LED lamp flashing circuit described in claim 11 or 12, it is characterized in that: described single-chip microcomputer is 8 single-chip microcomputers.
14. according to the LED lamp flashing circuit described in claim 11 or 12, it is characterized in that: flicker control unit also comprises the memory IC for storing data, and memory IC is connected with described single-chip microcomputer.
15. LED lamp flashing circuits according to claim 14, is characterized in that: the model of described memory IC is 24C01 or 24C02.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320748650.5U CN203632922U (en) | 2013-11-25 | 2013-11-25 | LED lamp flashing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320748650.5U CN203632922U (en) | 2013-11-25 | 2013-11-25 | LED lamp flashing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632922U true CN203632922U (en) | 2014-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320748650.5U Expired - Lifetime CN203632922U (en) | 2013-11-25 | 2013-11-25 | LED lamp flashing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203632922U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848377A (en) * | 2015-01-14 | 2016-08-10 | 苏州力生美半导体有限公司 | Flashing light control chip |
| CN108200684A (en) * | 2017-12-28 | 2018-06-22 | 宁波高新区敦和科技有限公司 | A kind of lamp string of adjustment operating mode |
| CN113395806A (en) * | 2021-04-27 | 2021-09-14 | 青岛威奥轨道股份有限公司 | Synchronous flashing circuit of railway tail lamp |
-
2013
- 2013-11-25 CN CN201320748650.5U patent/CN203632922U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848377A (en) * | 2015-01-14 | 2016-08-10 | 苏州力生美半导体有限公司 | Flashing light control chip |
| CN108200684A (en) * | 2017-12-28 | 2018-06-22 | 宁波高新区敦和科技有限公司 | A kind of lamp string of adjustment operating mode |
| CN113395806A (en) * | 2021-04-27 | 2021-09-14 | 青岛威奥轨道股份有限公司 | Synchronous flashing circuit of railway tail lamp |
| CN113395806B (en) * | 2021-04-27 | 2023-01-24 | 青岛威奥轨道股份有限公司 | Synchronous flashing circuit of railway tail lamp |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20140604 |
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| CX01 | Expiry of patent term |