CN104936342A - LED lamp protection circuit - Google Patents
LED lamp protection circuit Download PDFInfo
- Publication number
- CN104936342A CN104936342A CN201510299637.XA CN201510299637A CN104936342A CN 104936342 A CN104936342 A CN 104936342A CN 201510299637 A CN201510299637 A CN 201510299637A CN 104936342 A CN104936342 A CN 104936342A
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- Prior art keywords
- led lamp
- led
- protection circuit
- string
- lamp protection
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- 239000011324 bead Substances 0.000 claims abstract description 20
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000011049 pearl Substances 0.000 description 1
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses an LED lamp protection circuit. The LED lamp protection circuit comprises a power supply circuit, the power supply circuit is electrically connected with more than one LED lamp string, the LED lamp string is formed by connecting a plurality of LED lamp beads in series, and each LED lamp bead in the LED lamp string is connected in parallel with one resistor. Since each LED lamp bead of the LED lamp string formed by series connection is connected in parallel with one resistor, when a certain LED bead or a plurality of LED lamp beads are damaged, currents can still flow through the resistors connected in parallel with a damaged LED lamp, the whole LED lamp string can form a complete loop, undamaged LED lamps in the LED lamp string can still work normally, and the service life of the LED lamps employing the protection circuit provided by the invention is prolonged accordingly.
Description
Technical field
The present invention relates to a kind of protective circuit, particularly a kind of protective circuit of LED.
Background technology
As everyone knows, LED is due to its long service life, energy-conservation and be subject to the favor of people.In order to make LED can have enough illumination brightness, some LED are had to be that multiple LED lamp bead is connected into a LED string at present.If wherein certain or several LED lamp bead pearls damage, then whole LED string can be caused to open a way, and then those LED cannot normally be worked.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of structure simple, can make connect the LED lamp protection circuit that the LED string that forms also can normally work when certain or the damage of several LED lamp bead by multiple LED lamp bead simultaneously.
The present invention is the technical scheme that its technical problem of solution adopts:
A kind of LED lamp protection circuit, comprise power supply circuits, described power supply circuits are electrically connected with the LED string of more than a group, and described LED string is connected in series by several LED lamp bead and forms, and each LED lamp bead in described LED string is all parallel with a resistance.
As the improvement of technique scheme, described LED string is also connected with one and disappears ripple circuit.
As the further improvement of technique scheme, described in the ripple circuit that disappears be one to disappear ripple IC.
In the present invention, the ripple circuit in parallel that disappears described in has a diode divided current circuit.
Preferably, described diode divided current circuit is made up of three Diode series connections.
Further, the Standard resistance range of described resistance is 20-1000 Ω.
Further again, the Standard resistance range of described resistance is 20-470 Ω
The invention has the beneficial effects as follows: because the present invention is by the resistance in parallel of difference in each LED lamp bead being composed in series LED string; when wherein certain or several LED lamp bead are damaged; electric current still can flow through from the resistance in parallel with the LED damaged; thus make whole LED string can form a complete loop; do not have the LED damaged still can normally work in LED string, and then extend the useful life of the LED adopting protective circuit of the present invention.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the circuit connection diagram of protective circuit of the present invention.
Embodiment
With reference to Fig. 1; a kind of LED lamp protection circuit; comprise power supply circuits 10; described power supply circuits 10 are electrically connected with the LED string 20 of more than a group; in the present invention; the quantity of the LED string 20 that described power supply circuits 10 connect can one group, two groups, three groups or many groups; the group number of the LED string that these power supply circuits 10 connect specifically is decided according to the actual requirements and is not defined as one group; described LED string 20 is connected in series by several LED lamp bead 21 and forms, and each LED lamp bead 21 in described LED string 20 is all parallel with a resistance 30.
In order to reduce the electric current, the reduction power consumption that flow through resistance 30, in the present invention, preferably, the Standard resistance range of described resistance 30 is 20-1000 Ω, because the voltage putting on LED lamp bead 21 two ends can not be too high, therefore also bear identical voltage with the resistance 30 of LED lamp bead 21 parallel connection, and then make the electric current flowing through resistance 30 relatively very little, and then the electric energy loss that minimizing resistance 30 causes; Further preferably, the Standard resistance range of described resistance is 20-470 Ω.
Further; in order to make to adopt the LED of protective circuit of the present invention to there will not be stroboscopic, described LED string 20 is also connected with one and disappears ripple circuit 40, as the preferred embodiments of the present invention; the described ripple circuit 40 that disappears is one to disappear ripple IC, and preferably model is the ripple IC that disappears of SM208ND further.
Further again; in order to make to disappear ripple IC in the case of damages above-mentioned; protective circuit of the present invention still can normally work; preferably; the described ripple circuit 40 that disappears is parallel with a diode divided current circuit 50; here, as the preferred embodiments of the present invention, described diode divided current circuit 50 is connected in series by three diodes 51 and forms.Normal working voltage due to the ripple IC that disappears is 1-2V, and the diode 51 of three series connection then can produce the pressure reduction of about 2.4V, and when the ripple IC that disappears is intact, disappear ripple IC normal ground loop works; When damaging at the ripple IC that disappears; electric current then can flow through diode divided current circuit 50; thus make LED lamp protection circuit of the present invention form a complete loop; and then make LED lamp bead 21 can normal power-up luminous, effectively extend the useful life of the LED adopting LED lamp protection circuit of the present invention.
The foregoing is only preferred embodiments of the present invention, as long as the technical scheme realizing the object of the invention with basic same approach all belongs within protection scope of the present invention.
Claims (7)
1. a LED lamp protection circuit; comprise power supply circuits; described power supply circuits are electrically connected with the LED string of more than a group, and described LED string is connected in series by several LED lamp bead and forms, and it is characterized in that: each LED lamp bead in described LED string is all parallel with a resistance.
2. a kind of LED lamp protection circuit according to claim 1, is characterized in that: described LED string is also connected with one and disappears ripple circuit.
3. a kind of LED lamp protection circuit according to claim 2, is characterized in that: described in the ripple circuit that disappears be one to disappear ripple IC.
4. a kind of LED lamp protection circuit according to Claims 2 or 3, is characterized in that: described in the ripple circuit in parallel that disappears have a diode divided current circuit.
5. a kind of LED lamp protection circuit according to claim 4, is characterized in that: described diode divided current circuit is made up of three Diode series connections.
6. a kind of LED lamp protection circuit according to claim 1, is characterized in that: the Standard resistance range of described resistance is 20-1000 Ω.
7. a kind of LED lamp protection circuit according to claim 6, is characterized in that: the Standard resistance range of described resistance is 20-470 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510299637.XA CN104936342A (en) | 2015-06-03 | 2015-06-03 | LED lamp protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510299637.XA CN104936342A (en) | 2015-06-03 | 2015-06-03 | LED lamp protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104936342A true CN104936342A (en) | 2015-09-23 |
Family
ID=54123226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510299637.XA Pending CN104936342A (en) | 2015-06-03 | 2015-06-03 | LED lamp protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104936342A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI767698B (en) * | 2021-05-13 | 2022-06-11 | 矽誠科技股份有限公司 | Parallel sequenced led light string |
| US11950338B2 (en) | 2021-07-02 | 2024-04-02 | Semisilicon Technology Corp. | Parallel sequenced LED light string |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201518547U (en) * | 2009-10-29 | 2010-06-30 | 陈寇忠 | Semi-conductor lighting constant-current power supply |
| CN201611964U (en) * | 2009-12-11 | 2010-10-20 | 巢湖市金鼎盛电子灯饰有限公司 | Novel LED lamp string circuit structure |
| CN202818677U (en) * | 2012-09-13 | 2013-03-20 | 苏州佰迪光电科技有限公司 | Circuit capable of stabilizing voltage of light emitting diode |
| CN202931595U (en) * | 2012-11-27 | 2013-05-08 | 孟耕 | Protective circuit for serially connected LED lamps |
| CN204190967U (en) * | 2014-09-30 | 2015-03-04 | 北京华宝芯能科技发展有限公司 | A kind of LED daylight lamp height PF is without flash constant current source circuit |
| CN204795714U (en) * | 2015-06-03 | 2015-11-18 | 周玉龙 | LED lamp protection circuit |
-
2015
- 2015-06-03 CN CN201510299637.XA patent/CN104936342A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201518547U (en) * | 2009-10-29 | 2010-06-30 | 陈寇忠 | Semi-conductor lighting constant-current power supply |
| CN201611964U (en) * | 2009-12-11 | 2010-10-20 | 巢湖市金鼎盛电子灯饰有限公司 | Novel LED lamp string circuit structure |
| CN202818677U (en) * | 2012-09-13 | 2013-03-20 | 苏州佰迪光电科技有限公司 | Circuit capable of stabilizing voltage of light emitting diode |
| CN202931595U (en) * | 2012-11-27 | 2013-05-08 | 孟耕 | Protective circuit for serially connected LED lamps |
| CN204190967U (en) * | 2014-09-30 | 2015-03-04 | 北京华宝芯能科技发展有限公司 | A kind of LED daylight lamp height PF is without flash constant current source circuit |
| CN204795714U (en) * | 2015-06-03 | 2015-11-18 | 周玉龙 | LED lamp protection circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI767698B (en) * | 2021-05-13 | 2022-06-11 | 矽誠科技股份有限公司 | Parallel sequenced led light string |
| US11950338B2 (en) | 2021-07-02 | 2024-04-02 | Semisilicon Technology Corp. | Parallel sequenced LED light string |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170626 Address after: 528400, No. two, first, second, third, Sha wing, No. eight, Torch Development Zone, Zhongshan, Guangdong Applicant after: Guangdong Di Yi Sheng Photoelectric Technology Co., Ltd. Address before: 528400, Guangdong, Zhongshan province National Fire high tech Industrial Development Zone, 8 sand wing, Zhongshan Di AI / Addison Photoelectric Technology Co., Ltd. Applicant before: Zhou Yulong |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150923 |