CN101861015A - LED light bar protective circuit - Google Patents
LED light bar protective circuit Download PDFInfo
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- CN101861015A CN101861015A CN201010166282A CN201010166282A CN101861015A CN 101861015 A CN101861015 A CN 101861015A CN 201010166282 A CN201010166282 A CN 201010166282A CN 201010166282 A CN201010166282 A CN 201010166282A CN 101861015 A CN101861015 A CN 101861015A
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- led light
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Abstract
The invention discloses an LED light bar protective circuit, comprising a constant current control source, a power supply voltage (Vcc) and an LED light bar connected between the constant current control source and the power supply voltage (Vcc). The LED light bar consists of a plurality of LEDs, and each LED is connected with a voltage-regulator diode in parallel. In the invention, the voltage-regulator diode is connected in parallel on each LED in the series type LED light bar, and each LED in the LED light bar is in a constant-voltage loop, and therefore, even if some LEDs are damaged, the normal work of the whole LED light bar can not be influenced, and the performance and the reliability of the product are improved.
Description
[technical field]
The invention belongs to the LED technical field, relate in particular in the LED lamp bar that the tandem mode connects, the LED light bar protective circuit that LED lamp bar is protected.
[background technology]
The use of LED lamp concerning household electrical appliances always for a long time, but the application of LED is to the image quality of colour TV, contrast, also deriving from of outstanding contribution made nearly 2 years in the energy consumption aspect, early stage LED also is applied to TV domain, but it is basic just in order to assist the effect of grade as a kind of indication as a kind of TV of giving, and in recent years along with the development of LCD TV, adopt the LED lamp to begin large batch of application as light source for the liquid crystal TV, it brings good effect not only for the energy-saving and emission-reduction of TV, but also the colour gamut and the contrast of LCD TV have been promoted, promoted the viewing effect of LCD TV greatly, but every of LCD TV all needs the number LEDs, the constant current constant voltage source that one passage can not every LEDs all be provided, so just need LED that series connection is arranged, be connected in parallel, yet when employing is connected in series mode, if open circuit type damage of single LEDs among the LED of series connection, then the LED lamp bar of this series connection will all knock out, all no longer luminous, cause the LED LCD TV to demonstrate existing a slice and can't show situation, make the performance of LED LCD TV be affected.
[summary of the invention]
The purpose of the embodiment of the invention is to provide a kind of LED light bar protective circuit, and is downright bad and make the situation generation that the work of other LED is affected to avoid in the LED lamp bar that the tandem mode connects because single LEDs opens circuit type.
The embodiment of the invention is to realize like this; a kind of LED light bar protective circuit; include constant current Controlling Source, supply power voltage Vcc, be connected in the LED lamp bar between constant current Controlling Source and the supply power voltage Vcc; wherein; described LED lamp bar is made of a plurality of LED light-emitting diodes, and each LED light-emitting diode is connected in parallel to a voltage-stabiliser tube.
Further, the positive pole of the negative pole of described voltage-stabiliser tube and LED light-emitting diode is connected in a node, and the negative pole of the positive pole of voltage-stabiliser tube and LED light-emitting diode is connected in another node, thereby makes the every LEDs light-emitting diode in the LED lamp bar all be in a kind of loop of constant voltage.
In embodiments of the present invention, by a voltage stabilizing didoe in parallel on every LEDs light-emitting diode in tandem type LED lamp bar, every LEDs light-emitting diode in the LED lamp bar all is in a kind of loop of constant voltage, even thereby indivedual LED light-emitting diode damages, also can not have influence on the operate as normal of whole LED lamp bar, improve the Performance And Reliability of product.
[description of drawings]
Fig. 1 is the circuit theory diagrams of LED light bar protective circuit of the present invention.
[embodiment]
For the purpose, technical scheme and the advantage that make this creation is clearer,, this creation is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
With reference to shown in Figure 1, LED light bar protective circuit of the present invention includes constant current Controlling Source, supply power voltage Vcc, is connected in the LED lamp bar between constant current Controlling Source and the supply power voltage Vcc.LED lamp bar is made of a plurality of LED light-emitting diodes, each LED light-emitting diode is connected in parallel to a voltage-stabiliser tube, the positive pole of the negative pole of voltage-stabiliser tube and LED light-emitting diode is connected in a node, and the negative pole of the positive pole of voltage-stabiliser tube and LED light-emitting diode is connected in another node, thereby make the every LEDs light-emitting diode in the LED lamp bar all be in a kind of loop of constant voltage, even certain LEDs light-emitting diode damages, also can not have influence on the operate as normal of whole LED lamp bar.Supply power voltage Vcc also is connected with and is first, second filter capacitor C1, the C2 that is connected in parallel.In the present embodiment, the LED lamp bar that constitutes with six LED light-emitting diodes is that example describes, be respectively first, second, the 3rd, the 4th, the 5th, the 6th LED light-emitting diode D1, D2, D3, D4, D5, D6, be connected in parallel to the first voltage-stabiliser tube ZD1 with a LED light-emitting diode D1, be connected in parallel to the second voltage-stabiliser tube ZD2 with the 2nd LED light-emitting diode D2, be connected in parallel to the 3rd voltage-stabiliser tube ZD3 with the 3rd LED light-emitting diode D3, be connected in parallel to the 4th voltage-stabiliser tube ZD4 with the 4th LED light-emitting diode D4, be connected in parallel to the 5th voltage-stabiliser tube ZD5 with the 5th LED light-emitting diode D5, be connected in parallel to the 6th voltage-stabiliser tube ZD6 with the 6th LED light-emitting diode D6; These six parallel branches are connected in series between constant current Controlling Source and the supply power voltage Vcc, wherein a LED light-emitting diode D1 is connected the constant current Controlling Source with an end of the parallel branch of first voltage-stabiliser tube ZD1 formation, the other end connects the parallel branch of the 2nd LED light-emitting diode D2 and second voltage-stabiliser tube ZD2 formation, connect so successively, at last, the 6th LED light-emitting diode D6 is connected supply power voltage Vcc with the parallel branch that the 6th voltage-stabiliser tube ZD6 constitutes.
Supply power voltage Vcc provides power supply for LED lamp bar, and the voltage of Vcc is according to the rated voltage decision of a number and single LEDs light-emitting diode of LED coupled in series light-emitting diode; And the burning voltage of voltage-stabiliser tube is selected according to the rated voltage of single LEDs light-emitting diode; The constant current Controlling Source provides a constant Control current for the LED light-emitting diode, and this constant voltage is required to adjust by the rated current of single pass LED light-emitting diode.Under the situation of operate as normal, voltage-stabiliser tube is to provide a stable voltage to every LEDs light-emitting diode, has improved the reliability of LED light-emitting diode; And when wherein a certain LEDs light-emitting diode opens circuit, work on, so can not cause whole piece LED lamp bar open circuit and cause LED lamp bar to extinguish with its shunt regulator tube.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. LED light bar protective circuit; include constant current Controlling Source, supply power voltage (Vcc), be connected in the LED lamp bar between constant current Controlling Source and the supply power voltage (Vcc); it is characterized in that: described LED lamp bar is made of a plurality of LED light-emitting diodes, and each LED light-emitting diode is connected in parallel to a voltage-stabiliser tube.
2. LED light bar protective circuit as claimed in claim 1; it is characterized in that: the positive pole of the negative pole of described voltage-stabiliser tube and LED light-emitting diode is connected in a node; and the negative pole of the positive pole of voltage-stabiliser tube and LED light-emitting diode is connected in another node, thereby makes the every LEDs light-emitting diode in the LED lamp bar all be in a kind of loop of constant voltage.
3. LED light bar protective circuit as claimed in claim 2 is characterized in that: supply power voltage (Vcc) also is connected with and is first, second filter capacitor (C1), (C2) that is connected in parallel.
4. LED light bar protective circuit as claimed in claim 3, it is characterized in that: described LED lamp bar includes six LED light-emitting diodes, is respectively the first, second, third, fourth, the 5th, the 6th LED light-emitting diode (D1), (D2), (D3), (D4), (D5), (D6); Be connected in parallel to first voltage-stabiliser tube (ZD1) with a LED light-emitting diode (D1), be connected in parallel to second voltage-stabiliser tube (ZD2) with the 2nd LED light-emitting diode (D2), be connected in parallel to the 3rd voltage-stabiliser tube (ZD3) with the 3rd LED light-emitting diode (D3), be connected in parallel to the 4th voltage-stabiliser tube (ZD4) with the 4th LED light-emitting diode (D4), be connected in parallel to the 5th voltage-stabiliser tube (ZD5) with the 5th LED light-emitting diode (D5), be connected in parallel to the 6th voltage-stabiliser tube (ZD6) with the 6th LED light-emitting diode (D6).
5. a module backlight is characterized in that: include LED light bar protective circuit as claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010166282A CN101861015A (en) | 2010-04-30 | 2010-04-30 | LED light bar protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010166282A CN101861015A (en) | 2010-04-30 | 2010-04-30 | LED light bar protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101861015A true CN101861015A (en) | 2010-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010166282A Pending CN101861015A (en) | 2010-04-30 | 2010-04-30 | LED light bar protective circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN101861015A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102149241A (en) * | 2011-05-11 | 2011-08-10 | 罗宏基 | LED (light-emitting diode) electrifying luminescence circuit |
| CN102595718A (en) * | 2012-01-31 | 2012-07-18 | 江苏好的节能光电科技有限公司 | Circuit for enhancing use reliability of discrete LED light source |
| CN110784956A (en) * | 2019-12-06 | 2020-02-11 | 中山市蓝德电子有限公司 | Low-voltage LED lamp strip voltage stabilizing circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201014383Y (en) * | 2007-03-16 | 2008-01-30 | 天津市数通科技有限公司 | LED series connecting application protection circuit |
| CN201103873Y (en) * | 2007-07-17 | 2008-08-20 | 石河子开发区三盛科工贸有限公司 | High reliability semiconductor LED lighting lamp |
| CN201119051Y (en) * | 2007-08-23 | 2008-09-17 | 梁雯洁 | A capacitor voltage reduction LED lighting circuit |
| JP2009016493A (en) * | 2007-07-03 | 2009-01-22 | Kanehirodenshi Corp | Led light emitting device |
| CN101630920A (en) * | 2009-05-21 | 2010-01-20 | 立明股份有限公司 | LED lighting lamp and power supply device thereof |
| JP2014014383A (en) * | 2012-06-10 | 2014-01-30 | Dunlop Sports Co Ltd | Golf ball |
-
2010
- 2010-04-30 CN CN201010166282A patent/CN101861015A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201014383Y (en) * | 2007-03-16 | 2008-01-30 | 天津市数通科技有限公司 | LED series connecting application protection circuit |
| JP2009016493A (en) * | 2007-07-03 | 2009-01-22 | Kanehirodenshi Corp | Led light emitting device |
| CN201103873Y (en) * | 2007-07-17 | 2008-08-20 | 石河子开发区三盛科工贸有限公司 | High reliability semiconductor LED lighting lamp |
| CN201119051Y (en) * | 2007-08-23 | 2008-09-17 | 梁雯洁 | A capacitor voltage reduction LED lighting circuit |
| CN101630920A (en) * | 2009-05-21 | 2010-01-20 | 立明股份有限公司 | LED lighting lamp and power supply device thereof |
| JP2014014383A (en) * | 2012-06-10 | 2014-01-30 | Dunlop Sports Co Ltd | Golf ball |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102149241A (en) * | 2011-05-11 | 2011-08-10 | 罗宏基 | LED (light-emitting diode) electrifying luminescence circuit |
| WO2012152215A1 (en) * | 2011-05-11 | 2012-11-15 | Luo Hongji | Led energizing lighting circuit |
| CN102595718A (en) * | 2012-01-31 | 2012-07-18 | 江苏好的节能光电科技有限公司 | Circuit for enhancing use reliability of discrete LED light source |
| CN110784956A (en) * | 2019-12-06 | 2020-02-11 | 中山市蓝德电子有限公司 | Low-voltage LED lamp strip voltage stabilizing circuit |
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| PB01 | Publication | ||
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Application publication date: 20101013 |