CN201066687Y - Break protection circuit for LED - Google Patents
Break protection circuit for LED Download PDFInfo
- Publication number
- CN201066687Y CN201066687Y CNU2007200690924U CN200720069092U CN201066687Y CN 201066687 Y CN201066687 Y CN 201066687Y CN U2007200690924 U CNU2007200690924 U CN U2007200690924U CN 200720069092 U CN200720069092 U CN 200720069092U CN 201066687 Y CN201066687 Y CN 201066687Y
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- China
- Prior art keywords
- light
- emitting diode
- protection circuit
- stabilizing chip
- voltage stabilizing
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Abstract
A shutdown protective circuit used in LED is characterized in that one end of the shutdown protective circuit is connected with the anode of LED and the other end is connected with the cathode of LED. The shutdown protective circuit consists of a current-limiting resistance (R2), two voltage-dividing resistances (R3, R4) and a voltage-stabilizing chip (IC); wherein, one end of the current-limiting resistance (R2) is respectively connected with the anode (A) of the stabilizing chip (IC) and one end of the voltage-dividing resistance (R3); the other end of the voltage-dividing resistance (R3) is respectively connected with the reference pole (REF) of the stabilizing chip (IC) and one end of the other voltage-dividing resistance (R4); the other end of the other voltage-dividing resistance (R4) is connected with the cathode (K) of the stabilizing chip (IC).
Description
[technical field]
The utility model relates to the protective circuit of light-emitting diode, more precisely, relates to the breaking protection circuit that is used for light-emitting diode.
[background technology]
Light-emitting diode compare with the energy-saving lighting lamp of general photo-voltaic power supply adapted have the life-span long, heating is low, not fragile, power consumption is little and more energy-conservation outstanding advantage.Along with led technology, especially the large-power light-emitting diodes technology is full-fledged, and light-emitting diode has begun to be widely used in lighting field, people it be described as 21 century replace fluorescent lamps and incandescent lamp the 4th generation lighting source.
In order to satisfy the demand of people's brightness of illumination, the lighting device that with the light-emitting diode is light source now all comprises a lot of light-emitting diodes usually, and these light-emitting diodes generally form an illuminating module with the form of many series connection earlier, then with these illuminating module common integrated light source that forms light emitting diode illuminating apparatus in parallel.Yet, there is following defective in this design: when a light-emitting diode in a certain illuminating module damages disconnection, cause the light-emitting diode of whole illuminating module do not have electric current by and can not work on, caused the waste of this illuminating module so on the one hand, also influence the illuminating effect of whole light emitting diode illuminating apparatus on the other hand to a greater extent, reduced the reliability of light emitting diode illuminating apparatus.
[utility model content]
Technical problem to be solved in the utility model is to overcome the defective that above-mentioned prior art exists, and a kind of breaking protection circuit that is used for light-emitting diode is provided, to improve the reliability of light emitting diode illuminating apparatus.
The utility model is achieved through the following technical solutions: a kind of breaking protection circuit that is used for light-emitting diode, one end of described breaking protection circuit is connected with the positive pole of light-emitting diode, the other end of breaking protection circuit is connected with the negative pole of light-emitting diode, described breaking protection circuit comprises a current-limiting resistance, two divider resistances and a voltage stabilizing chip, and an end of wherein said current-limiting resistance is connected with the positive pole of voltage stabilizing chip and an end of divider resistance respectively; The other end of divider resistance is connected with the reference utmost point of voltage stabilizing chip and an end of another divider resistance respectively; The other end of described another divider resistance is connected with the negative pole of voltage stabilizing chip.
Described breaking protection circuit also comprises another current-limiting resistance and a field effect transistor; described another current-limiting resistance is series between the grid of the negative electrode of voltage stabilizing chip and field effect transistor; the source electrode of described another divider resistance and field effect transistor is connected, and the drain electrode of described current-limiting resistance and field effect transistor is connected.
Described voltage stabilizing chip is one 431 electronic devices.
Compared with prior art; the utility model provides a kind of breaking protection circuit that is used for light-emitting diode; in use; described breaking protection circuit is connected in parallel on the light-emitting diode two ends; make when some light-emitting diodes disconnect; this breaking protection circuit is kept the conducting of entire circuit; and make the voltage and current of entire circuit constant; effectively changed so on the one hand in the prior art and caused the out of use situation of whole illuminating module because of a light-emitting diode damages; improved the utilization rate of resource greatly; also improve the illuminating effect of whole light emitting diode illuminating apparatus on the other hand to a certain extent, improved the reliability of light emitting diode illuminating apparatus.
[description of drawings]
Fig. 1 is the circuit diagram of the utility model embodiment one.
Fig. 2 is the circuit diagram of the utility model embodiment two.
[embodiment]
Embodiment one
See also shown in Figure 1; the breaking protection circuit 1 that the utility model disclosed is parallel to the two ends of light-emitting diode D; one end of this breaking protection circuit 1 is connected with the positive pole of light-emitting diode D, and the other end of breaking protection circuit 1 is connected with the negative pole of light-emitting diode D.For the electric current of the light-emitting diode D circuit that prevents to connect excessive, with a current-limiting resistance R1 and light-emitting diode D series connection.Breaking protection circuit 1 comprises current-limiting resistance R2; divider resistance R3 and R4; voltage stabilizing chip IC (the voltage stabilizing chip IC is 431 electronic devices in the present embodiment); wherein the anodal A of the end of current-limiting resistance R2 and voltage stabilizing chip IC and the end of divider resistance R3 are connected; the reference utmost point REF of the other end of divider resistance R3 and voltage stabilizing chip IC and the end of divider resistance R4 are connected, and the negative pole K of the other end of R4 and voltage stabilizing chip IC is connected.
When the inner disconnection of light-emitting diode D, electric current no longer passes through from light-emitting diode D.Voltage stabilizing chip IC and current-limiting resistance R2 replace light-emitting diode D and current-limiting resistance R1 to make the series circuit conducting.The output voltage of voltage stabilizing chip IC is only relevant with divider resistance R3, R4, and the size of the value by setting divider resistance R3 and divider resistance R4 makes the output voltage of voltage stabilizing chip IC equal light-emitting diode D both end voltage.In the present embodiment, the resistance of divider resistance R3, R4 is preferably very big, and the electric current by divider resistance R3, R4 is several microamperes, can ignore.Under the situation that light-emitting diode D opens circuit, current-limiting resistance R2 and the effect of voltage stabilizing chip IC have replaced the effect of light-emitting diode D and current-limiting resistance R1, and this breaking protection circuit 1 replaces the light-emitting diode D that opens circuit on function.
Embodiment two
See also shown in Figure 2; the breaking protection circuit 1 that the utility model disclosed is parallel to the two ends of light-emitting diode D; one end of this breaking protection circuit 1 is connected with the positive pole of light-emitting diode D, and the other end of breaking protection circuit 1 is connected with the negative pole of light-emitting diode D.For the electric current of the light-emitting diode D circuit that prevents to connect excessive, with a current-limiting resistance R1 and light-emitting diode D series connection.Breaking protection circuit 1 comprises current-limiting resistance R2 and R5, divider resistance R3 and R4, field effect transistor M and voltage stabilizing chip IC (the voltage stabilizing chip IC is 431 electronic devices in the present embodiment).Wherein the drain electrode of the end of current-limiting resistance R2 and field effect transistor M is connected, the anodal A of the other end and voltage stabilizing chip IC and the end of divider resistance R3 are connected, the reference utmost point REF of the other end of divider resistance R3 and voltage stabilizing chip IC and the end of divider resistance R4 are connected, the negative pole K of the other end of R4 and voltage stabilizing chip IC is connected, the grid of current-limiting resistance R5 one end and field effect transistor M is connected, and the negative pole K of the other end and voltage stabilizing chip IC is connected.
When the inner disconnection of light-emitting diode D, electric current no longer passes through from light-emitting diode D, and current-limiting resistance R2 both end voltage raises.The output voltage of voltage stabilizing chip IC is only relevant with divider resistance R3, R4, and the size of the value by setting divider resistance R3 and divider resistance R4 makes the output voltage of voltage stabilizing chip IC reach predetermined value.In the present embodiment, the resistance of divider resistance R3, R4 is preferably very big, and the electric current by divider resistance R3, R4 is several microamperes, can ignore.When field effect pipe M grid and source voltage rising, above behind the cut-in voltage, conducting between drain electrode and the source electrode.Voltage immobilizes after the field effect transistor M conducting, maintain one with the suitable numerical value of light-emitting diode D both end voltage.This breaking protection circuit 1 replaces the light-emitting diode D that opens circuit on function.
The utility model provides a kind of breaking protection circuit 1 that is used for light-emitting diode; in use; described breaking protection circuit 1 is connected in parallel on light-emitting diode two ends D; make when some light-emitting diode D disconnect; this breaking protection circuit 1 is kept the conducting of entire circuit; and make the voltage and current of entire circuit constant; effectively changed so on the one hand in the prior art and caused the out of use situation of whole illuminating module because of a light-emitting diode damages; improved the utilization rate of resource greatly; also improve the illuminating effect of whole light emitting diode illuminating apparatus on the other hand to a certain extent, improved the reliability of light emitting diode illuminating apparatus.
More than describing is embodiments of the invention only, forgives and can understand, and under the prerequisite that does not depart from the present invention's design, all should be included within the technical conceive of the present invention simple modification of the present invention and replacement.
Claims (3)
1. breaking protection circuit that is used for light-emitting diode, one end of described breaking protection circuit is connected with the positive pole of light-emitting diode, the other end of breaking protection circuit is connected with the negative pole of light-emitting diode, it is characterized in that: described breaking protection circuit comprises current limliting one resistance (R2), two divider resistances (R3, R4) and a voltage stabilizing chip (IC), and an end of wherein said current-limiting resistance (R2) is connected with the positive pole (A) of voltage stabilizing chip (IC) and an end of divider resistance (R3) respectively; The other end of divider resistance (R3) is connected with the reference utmost point (REF) of voltage stabilizing chip (IC) and an end of another divider resistance (R4) respectively; The negative pole (K) of the other end of described another divider resistance (R4) and voltage stabilizing chip (IC) is connected.
2. the breaking protection circuit that is used for light-emitting diode as claimed in claim 1; it is characterized in that: described breaking protection circuit also comprises another current-limiting resistance (R5) and a field effect transistor (M); described another current-limiting resistance (R5) is series between the grid of the negative electrode (K) of voltage stabilizing chip (IC) and field effect transistor (M); described another divider resistance (R4) is connected with the source electrode of field effect transistor (M), and described current-limiting resistance (R2) is connected with the drain electrode of field effect transistor (M).
3. the breaking protection circuit that is used for light-emitting diode as claimed in claim 1 or 2 is characterized in that: described voltage stabilizing chip (IC) is one 431 electronic devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200690924U CN201066687Y (en) | 2007-04-19 | 2007-04-19 | Break protection circuit for LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200690924U CN201066687Y (en) | 2007-04-19 | 2007-04-19 | Break protection circuit for LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201066687Y true CN201066687Y (en) | 2008-05-28 |
Family
ID=39483870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200690924U Expired - Fee Related CN201066687Y (en) | 2007-04-19 | 2007-04-19 | Break protection circuit for LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201066687Y (en) |
-
2007
- 2007-04-19 CN CNU2007200690924U patent/CN201066687Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGBO DEJIA LIGHTING + TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: NINGBO ANDY OPTOELECTRONIC TECHNOLOGY CO., LTD. Effective date: 20120629 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120629 Address after: 315400 Xiao Dong Industrial Park, Zhejiang, Yuyao Patentee after: Ningbo Dejia Lighting & Technology Co., Ltd. Address before: 315400 industrial functional zone, southwest Street, Zhejiang, Yuyao Patentee before: Ningbo Andy Optoelectronic Technology Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: KUNSHAN DONGDA ZHIHUI TECHNOLOGY CONSULTING CO., L Free format text: FORMER OWNER: NINGBO DEJIA LIGHTING + TECHNOLOGY CO., LTD. Effective date: 20141023 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 315400 NINGBO, ZHEJIANG PROVINCE TO: 215300 SUZHOU, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20141023 Address after: 215300, No. 335 middle Lu Bai Lu, Yushan Town, Suzhou City, Jiangsu, Kunshan Patentee after: Kunshan Dongda Zhihui Technology Consulting Co., Ltd. Address before: 315400 Xiao Dong Industrial Park, Zhejiang, Yuyao Patentee before: Ningbo Dejia Lighting & Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080528 Termination date: 20150419 |
|
| EXPY | Termination of patent right or utility model |