CN101340764A - Protection technique of open loop damage of LED in series circuit - Google Patents
Protection technique of open loop damage of LED in series circuit Download PDFInfo
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- CN101340764A CN101340764A CNA200810063355XA CN200810063355A CN101340764A CN 101340764 A CN101340764 A CN 101340764A CN A200810063355X A CNA200810063355X A CN A200810063355XA CN 200810063355 A CN200810063355 A CN 200810063355A CN 101340764 A CN101340764 A CN 101340764A
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Abstract
The invention discloses a protection technique used for LED open-circuit damage in a serial circuit, which is characterized in that two ends of each or a plurality of LEDs in the serial circuit are respectively connected with stabilizer elements in parallel respectively. When certain an LED open-circuit in the circuit is damaged, the voltage at two ends of the LED is increased due to the open circuit, thus breaking through the stabilizer element; therefore, the whole serial circuit can still run normally due to the conduction of the stabilizer element, and other LEDs in the branch circuit can still work normally. Therefore, the protection technique of the invention effectively solves the problem of the whole circuit caused by the damage of the open-circuit of certain an LED, and reduces the effects to the lowest extent.
Description
Technical field
The present invention relates to a kind ofly when a certain light-emitting diode open-circuit damages in the light-emitting diode series connection circuit, still can guarantee the resist technology of entire circuit operate as normal.
Background technology
Growing along with science and technology, the circuit (as the LED lamp) that adopts superhigh brightness LED to be in series is applied to fields such as normal lighting, agricultural, biological illumination, traffic just more and more widely.Shown in Figure 1 promptly is a kind of LED lamp, and it is connected on the single or multiple series arms of forming together by light-emitting diode and is unified into, and each series arm comprises n light-emitting diode and balance resistance R.Traffic lights are also with being formed in parallel after 3-7 the left and right sides light-emitting diode series connection again.For another example, the patent No. is that 200620105207.6 patent of invention discloses " a kind of with electric main can direct-connected crystal lamp ", in the 220v alternating current circuit, for reaching best energy-saving effect, the light-emitting diode number of single channel series connection up to 84 about.In the circuit of these daily uses, although lifetime of LED in continuous prolongation, sometimes because of multiple reasons such as defective workmanships, indivedual light-emitting diodes also can damage: the one, short circuit damages.Branch road on be that a light-emitting diode do not worked because the existence of balance resistance R is arranged this moment, can not influence the operate as normal of other light-emitting diode in the whole series circuit, so influence smaller.The 2nd, open circuit damages.This moment, whole series circuit was obstructed because of one of them light-emitting diode open-circuit damages, and promptly all light-emitting diodes on this branch road have not all worked.We often see that traffic lights have a little bank light not work or lack pen and have drawn less, extinguish at once with the LED lamp of light-emitting diode series connection circuit production.So it is fatefulue damage that open circuit damages, also be one of modal fault in the light-emitting diode series connection circuit application.
Summary of the invention
Technical problem to be solved by this invention is to propose a kind of can effectively the solution in the series circuit and damages the resist technology that entire circuit is caused damage because of single light-emitting diode open-circuit.
For solving the problems of the technologies described above, the resist technology that light-emitting diode open-circuit damages in the series circuit of the present invention is achieved in that each or the every two ends of several described light-emitting diodes voltage stabilizing components and parts that are connected in parallel respectively in the series circuit.
The resist technology that light-emitting diode open-circuit damages in the above-mentioned series circuit, described each or whenever the two ends of several light-emitting diodes be parallel with voltage-stabiliser tube respectively.
The resist technology that light-emitting diode open-circuit damages in the above-mentioned series circuit, described each or whenever the two ends of several light-emitting diodes be parallel with piezo-resistance respectively.
The resist technology that light-emitting diode open-circuit damages in the above-mentioned series circuit, described each or the every two ends of several light-emitting diodes the forward series arm that is connected in parallel respectively by two or more diodes.
The resist technology that light-emitting diode open-circuit damages in the series circuit of the present invention also can be achieved like this: in each light-emitting diode described in the circuit, directly with LED core be packaged together after voltage-stabiliser tube tube core reverse parallel connection is connected.
The resist technology that light-emitting diode open-circuit damages in the series circuit of the present invention also can be achieved like this: form whole circuit of LED after light-emitting diode is connected on the single series arm that forms together or a plurality of series arm parallel connection; each light-emitting diode (LED) module is by a plurality of LED core connection in series-parallel composite module together, with described each or whenever several LED core be connected with a voltage-stabiliser tube tube core reverse parallel connection and be encapsulated on the same module.
The present invention is owing to adopted technique scheme, when a certain light-emitting diode open-circuit damages in the circuit, the voltage at these light-emitting diode two ends raises because of open circuit, thereby punctures voltage stabilizing components and parts (as voltage-stabiliser tube, piezo-resistance, diode or voltage-stabiliser tube tube core etc.).Voltage stabilizing this moment components and parts play pressure stabilization function, conducting, though it can be not luminous in series circuit but have substituted the conducting effect that damages light-emitting diode, whole series circuit still can normally move because of the conducting of voltage stabilizing components and parts, just one of them light-emitting diode has not worked, and other light-emitting diode still can operate as normal in the branch road.Obviously, the present invention has solved effectively because of single light-emitting diode open-circuit damages the problem that entire circuit is brought, and it has dropped to bottom line with this influence.
Description of drawings
Fig. 1 is the circuit wiring schematic diagram of existing LED lamp;
Fig. 2 is for adopting a kind of circuit wiring schematic diagram of the technology of the present invention;
Fig. 3 is the second kind of circuit wiring schematic diagram that adopts the technology of the present invention;
Fig. 4 is the light-emitting diode structure schematic diagram that adopts the technology of the present invention;
Fig. 5 is the structural representation that adopts the light-emitting diode (LED) module of the technology of the present invention;
Fig. 6 is the third circuit wiring schematic diagram that adopts the technology of the present invention;
Fig. 7 is the 4th kind of circuit wiring schematic diagram that adopts the technology of the present invention.
Embodiment
As shown in Figure 2, adopt a kind of LED lamp of resist technology of the present invention, it is made up of the single series arm that light-emitting diode is connected on together, and this series arm is by n light-emitting diode N
1, N
2N
nBe in series with the balance resistance R, the two ends of each light-emitting diode are parallel with a voltage-stabiliser tube W respectively
1, W
2W
nVoltage-stabiliser tube stable voltage U
wShould 〉=positive voltage of light emitting diode value U
NDuring the circuit operate as normal, because of U
w〉=U
N, voltage-stabiliser tube is inoperative in circuit.And when a certain Light-Emitting Diode damages in the circuit: if short circuit damages, then entire circuit is not had a significant impact, just this light-emitting diode has not worked, and voltage-stabiliser tube is inoperative because of the light-emitting diodes tube short circuit.And if open circuit damages, as N
1Open a way when damaging, so N
1Both end voltage raises because of open circuit, thereby punctures voltage-stabiliser tube W
1This moment W
1Play pressure stabilization function, conducting is not though it can luminously substitute N in series circuit
1The conducting effect, whole series circuit is because of W
1Conducting still can normally move N wherein just
1Do not worked, other light-emitting diode still can operate as normal in the branch road.Obviously it has dropped to bottom line with the influence that a light-emitting diode open-circuit damages circuit.
As shown in Figure 3, adopt the LED lamp of resist technology of the present invention to be made up of a plurality of series arms that light-emitting diode is connected on together, each series arm is by n light-emitting diode N
1, N
2N
nBe in series with the balance resistance R.In order to reduce to protect cost, in order to simplify circuit, requiring in brightening precision or brightening degree is not under the very high situation, can protect several light-emitting diodes with a voltage-stabiliser tube yet, the two ends of for example per three light-emitting diodes voltage-stabiliser tube that is connected in parallel.At this moment, U
w〉=3 * U
NAs, U
NDuring for 3.2v, that U
wShould more than 9.6v, be advisable with 9.6v～9.9v.Work as N
1, N
2, N
3In when having light-emitting diode open-circuit to damage, then these three light-emitting diodes all do not work, other light-emitting diode of series arm is then unaffected.
As shown in Figure 4; identical with the design of above-mentioned resist technology; can be directly in the resist technology of the present invention the voltage-stabiliser tube tube core 3 of be dirt cheap (the about 0.01 yuan/sheet) that play a protective role be packaged together with LED core 2 inverse parallels, becomes the light-emitting diode of a band defencive function.Then it is directly used in series arm.When a certain light-emitting diode open-circuit damages, voltage-stabiliser tube tube core 3 conductings in this light-emitting diode, this light-emitting diode does not work, and other light-emitting diode in the same series arm still can operate as normal.Certainly, the light-emitting diode of different colours, different forward voltages should adopt the voltage stabilizing tube core of corresponding voltage stabilizing value.Among the figure, 1 expression transparent tube body, 4 expressions connect pin.
As shown in Figure 5, same, the composite module of a plurality of LED core 2 also can be encapsulated in voltage-stabiliser tube tube core 3 on the same module 5 as Fig. 2, circuit shown in Figure 3 when encapsulation, becomes a kind of led module device with defencive function.
In the resist technology of the present invention, the voltage stabilizing components and parts also can adopt other to have the device of voltage stabilizing function.As shown in Figure 6, can adopt piezo-resistance R
1, R
2R
nReplace voltage-stabiliser tube, be connected in the two ends of light-emitting diode in parallel.As shown in Figure 7, can also be connected in the two ends of light-emitting diode in parallel with after two or more diode forward series connection.When a certain light-emitting diode open-circuit damaged, they are the same with voltage-stabiliser tube can play effective protective effect.
The alleged LED lamp of the present invention should be contained LED flashlight, traffic lights, railway signal lamp, mining lamp, decorative lamp etc. and adopt the LED light-emitting device of light-emitting diode as light source.
Claims (6)
1, the resist technology that light-emitting diode open-circuit damages in the series circuit is characterized in that, it is with each or the every two ends of several described light-emitting diodes voltage stabilizing components and parts that are connected in parallel respectively in the series circuit.
2, the resist technology that light-emitting diode open-circuit damages in the series circuit as claimed in claim 1 is characterized in that, described each or whenever the two ends of several light-emitting diodes be parallel with voltage-stabiliser tube respectively.
3, the resist technology that light-emitting diode open-circuit damages in the series circuit as claimed in claim 1 is characterized in that, described each or whenever the two ends of several light-emitting diodes be parallel with piezo-resistance respectively.
4, the resist technology that light-emitting diode open-circuit damages in the series circuit as claimed in claim 1 is characterized in that, described each or the every two ends of several light-emitting diodes forward series arm by two or more diodes that is connected in parallel respectively.
5, the resist technology that light-emitting diode open-circuit damages in the series circuit is characterized in that, in each light-emitting diode described in the circuit, directly with LED core be packaged together after voltage-stabiliser tube tube core reverse parallel connection is connected.
6, the resist technology that light-emitting diode open-circuit damages in the series circuit; it is characterized in that; form whole circuit of LED after light-emitting diode is connected on together the single series arm that forms or a plurality of series arm parallel connection; each light-emitting diode (LED) module is by a plurality of LED core connection in series-parallel composite module together, with described each or whenever several LED core be connected with a voltage-stabiliser tube tube core reverse parallel connection and be encapsulated on the same module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810063355XA CN101340764A (en) | 2008-08-08 | 2008-08-08 | Protection technique of open loop damage of LED in series circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810063355XA CN101340764A (en) | 2008-08-08 | 2008-08-08 | Protection technique of open loop damage of LED in series circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101340764A true CN101340764A (en) | 2009-01-07 |
Family
ID=40214688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810063355XA Pending CN101340764A (en) | 2008-08-08 | 2008-08-08 | Protection technique of open loop damage of LED in series circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101340764A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986021A (en) * | 2010-11-25 | 2011-03-16 | 台龙电子（昆山）有限公司 | LED disconnecting and connecting circuit |
| CN105119472A (en) * | 2015-08-07 | 2015-12-02 | 邓富金 | Modularization multilevel converter fault protection and fault detection method |
| CN108811253A (en) * | 2018-07-17 | 2018-11-13 | 常州星宇车灯股份有限公司 | The DC-DC booster circuit of open circuit protecting function is used in LED module |
| CN108983453A (en) * | 2018-07-26 | 2018-12-11 | 武汉天马微电子有限公司 | Detection device, detection jig and the display module of backlight module |
-
2008
- 2008-08-08 CN CNA200810063355XA patent/CN101340764A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986021A (en) * | 2010-11-25 | 2011-03-16 | 台龙电子（昆山）有限公司 | LED disconnecting and connecting circuit |
| CN105119472A (en) * | 2015-08-07 | 2015-12-02 | 邓富金 | Modularization multilevel converter fault protection and fault detection method |
| CN105119472B (en) * | 2015-08-07 | 2018-10-02 | 邓富金 | Modular multilevel converter error protection and fault detection method |
| CN108811253A (en) * | 2018-07-17 | 2018-11-13 | 常州星宇车灯股份有限公司 | The DC-DC booster circuit of open circuit protecting function is used in LED module |
| CN108983453A (en) * | 2018-07-26 | 2018-12-11 | 武汉天马微电子有限公司 | Detection device, detection jig and the display module of backlight module |
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Application publication date: 20090107 |