CN103533698A - Light-emitting diode driver with protection path - Google Patents
Light-emitting diode driver with protection path Download PDFInfo
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- CN103533698A CN103533698A CN201210225634.8A CN201210225634A CN103533698A CN 103533698 A CN103533698 A CN 103533698A CN 201210225634 A CN201210225634 A CN 201210225634A CN 103533698 A CN103533698 A CN 103533698A
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- light
- emitting diode
- rectification unit
- rectifier
- diode group
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Abstract
The invention discloses a light-emitting diode driver with protection path. The light-emitting diode driver comprises a rectifier and a light-emitting diode group connected with the rectifier. The rectifier includes a rectification unit, a first capacitor and a rectifier diode; the rectification unit is provided with two input terminals and two output terminals; one input terminal of the rectification unit is connected with a first resistor; one output terminal of the rectification unit is connected in series with the rectifier diode and then is connected with the light-emitting diode group; the other output terminal of the rectification unit is connected with a ground wire; and the two terminals of the first capacitor are respectively connected to the two output terminals of the rectification unit. In addition, the light-emitting diode group includes a plurality of light-emitting diodes in series connection; each light-emitting diode in the light-emitting diode group is connected in parallel with a reversal voltage-stabilizing tube. According to the scheme, the provided light-emitting diode driver with the simple structure can be realized conveniently. Moreover, when the driver is used, the branch circuits of voltage-stabilizing tubes connected in parallel to the light-emitting diodes form a protection circuit, thereby avoiding an open-circuit phenomenon.
Description
Technical field
The present invention relates to lighting apparatus, specifically there is the LED drive of protection path.
Background technology
Along with social development, people are more and more higher to the requirement of lighting apparatus, and because LED has, operating voltage is low, light efficiency is high, thus the research of LED and application more and more extensive.LED lamp needs many lamp pearls to be together in series or parallel and could to work in use, adopts parallel way to drive the required voltage of a plurality of LED lower, but because the forward voltage drop of each LED is different, therefore the brightness of each LED is different.When adopting the type of drive of tandem type, the brightness of each LED is identical, while opening circuit but one of them or several LED break down, can make circuit open circuit and cisco unity malfunction.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art; provide a kind of mode of series connection that adopts to drive light-emitting diode, and the LED drive with protection path that can avoid circuit to open circuit when one or several light-emitting diode breaks down.
Object of the present invention is achieved through the following technical solutions: the LED drive with protection path, the light-emitting diode group that comprises rectifier and be connected with rectifier, described rectifier comprises rectification unit, the first electric capacity and rectifier diode, described rectification unit is provided with two inputs and two outputs, on an input of rectification unit, be connected with the first resistance, after an output series connection rectifier diode of rectification unit, be connected with light-emitting diode group, on another output of rectification unit, be connected with earth connection, the two ends of described the first electric capacity are connected on two outputs of rectification unit, described light-emitting diode group comprises the light-emitting diode of a plurality of series connection, is all parallel with the voltage-stabiliser tube of a reversal connection in light-emitting diode group on each light-emitting diode, the output head grounding of described light-emitting diode group.The present invention is when application, and two inputs of rectification unit receive the input of supply power voltage.In the present invention, the conducting voltage of each light-emitting diode should be lower than the voltage stabilizing value of voltage-stabiliser tube in parallel on it, otherwise voltage-stabiliser tube in parallel can divide and pours off one part of current and make that light-emitting diode is dimmed even not to work.
Described rectification unit is bridge rectifier.
Because thermistor its resistance when voltage increases increases, thereby can produce overcurrent protection, as preferably, described the first resistance is thermistor.
Described light-emitting diode group comprises three light-emitting diodes.
Compared with prior art, the present invention has following beneficial effect: the light-emitting diode group that the present invention includes rectifier and be connected with rectifier, wherein, light-emitting diode group comprises the light-emitting diode of a plurality of series connection, in light-emitting diode group, on each light-emitting diode, be all parallel with the voltage-stabiliser tube of a reversal connection, overall structure of the present invention is simple, be convenient to realize, when the present invention applies, the branch road that on each light-emitting diode, voltage-stabiliser tube in parallel forms forms protective circuit of the present invention, when the lamp pearl of certain light-emitting diode is opened circuit, the voltage-stabiliser tube in parallel with it devoted oneself to work, thereby can avoid circuit to open circuit, the present invention adopts the mode of series connection to drive light-emitting diode, and the brightness on each light-emitting diode is consistent, is convenient to of the present invention applying.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
In accompanying drawing, the corresponding name of Reference numeral is called: 1-rectification unit, R1-the first resistance, C1-the first electric capacity, D1-rectifier diode, LED1-the first light-emitting diode, LED2-the second light-emitting diode, LED3-three light-emitting diode, DW1-the first voltage-stabiliser tube, DW2-the second voltage-stabiliser tube, DW3-three voltage-stabiliser tube.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment:
As shown in Figure 1, the LED drive with protection path, comprise shell and internal circuit is in the enclosure set, wherein, the light-emitting diode group that internal circuit comprises rectifier and is connected with rectifier, wherein, rectifier comprises rectification unit 1, the first capacitor C 1 and rectifier diode D1, rectification unit 1 is bridge rectifier, rectification unit 1 is provided with two inputs and two outputs, two inputs of rectification unit 1 receive the input of supply power voltage, on an input of rectification unit 1, be connected with the first resistance R 1, the first resistance R 1 preferably adopts thermistor.After an output series connection rectifier diode D1 of rectification unit 1, be connected with light-emitting diode group, on another output of rectification unit 1, be connected with earth connection, the two ends of the first capacitor C 1 are connected on two outputs of rectification unit 1.
Light-emitting diode group comprises the light-emitting diode of a plurality of series connection, and in light-emitting diode group, on each light-emitting diode, is all parallel with the voltage-stabiliser tube of a reversal connection.In the present embodiment, be provided with three light-emitting diodes, three light-emitting diodes are respectively the first voltage-stabiliser tube DW1, the second voltage-stabiliser tube DW2 and the 3rd voltage-stabiliser tube DW3 that is parallel with respectively reversal connection on the first LED 1, the second LED 2 and 3, three light-emitting diodes of the 3rd LED.The output head grounding of light-emitting diode, is specially on the circuit between the 3rd voltage-stabiliser tube DW3 and the 3rd LED 3 and is connected with ground path.
As mentioned above, can well realize the present invention.
Claims (4)
1. the LED drive with protection path, it is characterized in that: the light-emitting diode group that comprises rectifier and be connected with rectifier, described rectifier comprises rectification unit (1), the first electric capacity (C1) and rectifier diode (D1), described rectification unit (1) is provided with two inputs and two outputs, on an input of rectification unit (1), be connected with the first resistance (R1), after an output series connection rectifier diode (D1) of rectification unit (1), be connected with light-emitting diode group, on another output of rectification unit (1), be connected with earth connection, the two ends of described the first electric capacity (C1) are connected on two outputs of rectification unit (1), described light-emitting diode group comprises the light-emitting diode of a plurality of series connection, is all parallel with the voltage-stabiliser tube of a reversal connection in light-emitting diode group on each light-emitting diode, the output head grounding of described light-emitting diode group.
2. the LED drive with protection path according to claim 1, is characterized in that: described rectification unit (1) is bridge rectifier.
3. the LED drive with protection path according to claim 1, is characterized in that: described the first resistance (R1) is thermistor.
4. according to any described in claim 1～3, there is the LED drive of protection path, it is characterized in that: described light-emitting diode group comprises three light-emitting diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210225634.8A CN103533698A (en) | 2012-07-03 | 2012-07-03 | Light-emitting diode driver with protection path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210225634.8A CN103533698A (en) | 2012-07-03 | 2012-07-03 | Light-emitting diode driver with protection path |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103533698A true CN103533698A (en) | 2014-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210225634.8A Pending CN103533698A (en) | 2012-07-03 | 2012-07-03 | Light-emitting diode driver with protection path |
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Citations (5)
| 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 |
| WO2010002199A2 (en) * | 2008-07-03 | 2010-01-07 | Kim Yong Chul | Led lighting circuit |
| CN201590933U (en) * | 2010-01-15 | 2010-09-22 | 赵佳俊 | Anti-interference constant-voltage constant-current circuit device for energy-saving LED lamp |
| CN202652594U (en) * | 2012-07-03 | 2013-01-02 | 成都市宏山科技有限公司 | Light emitting diode driver possessing protection path |
-
2012
- 2012-07-03 CN CN201210225634.8A patent/CN103533698A/en active Pending
Patent Citations (5)
| 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 |
| WO2010002199A2 (en) * | 2008-07-03 | 2010-01-07 | Kim Yong Chul | Led lighting circuit |
| CN201590933U (en) * | 2010-01-15 | 2010-09-22 | 赵佳俊 | Anti-interference constant-voltage constant-current circuit device for energy-saving LED lamp |
| CN202652594U (en) * | 2012-07-03 | 2013-01-02 | 成都市宏山科技有限公司 | Light emitting diode driver possessing protection path |
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Application publication date: 20140122 |