CN207543365U - A kind of LED lamp drive circuit that can be discharged dark current - Google Patents
A kind of LED lamp drive circuit that can be discharged dark current Download PDFInfo
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- CN207543365U CN207543365U CN201720851105.7U CN201720851105U CN207543365U CN 207543365 U CN207543365 U CN 207543365U CN 201720851105 U CN201720851105 U CN 201720851105U CN 207543365 U CN207543365 U CN 207543365U
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- led light
- drive circuit
- lamp drive
- led lamp
- led
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Abstract
The utility model is related to LED lamp drive circuit technical field more particularly to a kind of LED lamp drive circuit that can be discharged dark current, the driving power including LED light and for driving the LED light；Capacitance is parallel in the LED light；Dissipative cell is parallel on the capacitance.The goal of the invention of the utility model is to provide a kind of LED lamp drive circuit that can discharge to dark current solve the technical issues of LED light with energy-storage travelling wave tube will appear glimmer or scintillation using technical solution provided by the utility model.
Description
Technical field
The utility model is related to LED lamp drive circuit technical field more particularly to a kind of LED that can be discharged dark current
Lamp drive circuit.
Background technology
Light emitting diode is referred to as LED, is one kind of semiconductor diode, is made of a PN junction, it may have unidirectionally lead
Electrically, electric energy can be converted to luminous energy.Its principle of luminosity is after forward voltage is added to light emitting diode, is injected from P areas
The electronics in P areas is injected into the hole in N areas and by N areas, PN knots nearby in a few micrometers respectively with the electronics in N areas and the sky in P areas
Cave is compound, generates the fluorescence of spontaneous radiation.Light emitting diode is low with operating voltage；Operating current very little；Shock resistance and antidetonation
Performance is good, and reliability is high, long lifespan；It can also be by modulating the advantages that electric current power passed through modulates luminous power and extensive
Using.
Existing LED lamp mostly using the power supply mode of driving power access alternating current, in actual use, refers to Fig. 1, is
The stroboscopic of LED light is reduced, can be connected in parallel with a capacitor or use constant-current source in LED light to reach the effect of filtering alternating current
Fruit.Find in actual use, be parallel with capacity cell and using traditional switch LED light after turning off the light, some LED light
The phenomenon that will appear glimmer or flicker, for then more obvious using the LED light with order firewire intelligent switch.
The study found that the phenomenon that occurring glimmer or flicker after LED light power-off is due to there is dark electricity in LED lamp drive circuit
Stream.It is insufficient the electric current come to be let off there are scattered or single fiery intelligent switch after in LED light access driving circuit, in driving circuit
The trace quantity electric charge of LED light is connected, but these charges can be stored in the energy-storage travelling wave tubes such as capacitance, the inductance in LED lamp drive circuits
In, when the charge accumulated in energy-storage travelling wave tube reach LED lamps unlatching voltage when, energy-storage travelling wave tube by LED lamp electric discharge will lamp it is micro-
It is bright once, after the charge in energy-storage travelling wave tube releases, again in not working state, energy-storage travelling wave tube initially enters next LED light again
Period energy storage, electric discharge are long.
Utility model content
The goal of the invention of the utility model is to provide a kind of LED lamp drive circuit that can discharge to dark current, use
Technical solution provided by the utility model solves that the LED light with energy-storage travelling wave tube will appear glimmer or the technology of scintillation is asked
Topic.
In order to reach more than goal of the invention, the technical solution adopted in the utility model is：One kind can discharge to dark current
LED lamp drive circuit, the driving power including LED light and for driving the LED light；A discharge loop is provided, such as
Capacitance or other energy-storage travelling wave tubes are parallel in the LED light, then dissipative cell is parallel on energy-storage travelling wave tube.
Preferably, the dissipative cell is resistance.
Preferably, the ratio between the operating voltage value of the capacitance and the resistance value of the resistance is less than 1.5*10-4。
Therefore had the advantages that using the technical solution that the utility model embodiment provides, this practicality is new
Type is reached by discharging the integral charge in LED lamp drive circuit or allowing the charge of integration that driving LED light is not achieved
To the effect for avoiding LED light that glimmer or scintillation occur when power is off.
Description of the drawings
It, below will be to the utility model embodiment or the prior art in order to illustrate more clearly of the utility model embodiment
Attached drawing is briefly described needed in description.It should be evident that the accompanying drawings in the following description is only that this practicality is new
The part of the embodiment of type in other LED lamp drive circuits, can also be obtained according to these attached drawings other driving circuits
Way.
Fig. 1 is existing LED lamp drive circuit figure；
Fig. 2 is the utility model embodiment circuit diagram.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe.Obviously, the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without creative efforts
All other embodiments obtained shall fall within the protection scope of the present invention.
For the LED lamp drive circuit with energy-storage travelling wave tube, after LED light power-off, energy-storage travelling wave tube can discharge charge and then
So that LED light generates the phenomenon that glimmer or flicker.
Fig. 2 is referred to, the present embodiment provides a kind of LED lamp drive circuits that can be discharged dark current.The LED light is driven
Dynamic circuit includes LED light 10 and the driving power 20 for driving the LED light 10.
Since driving power 20 is incoming transport electricity, and alternating current can enable LED light 10 generate stroboscopic phenomenon, in order to reduce
The stroboscopic of LED light 10 is parallel with capacitance 30 in LED light 10, to achieve the effect that filter alternating current.
Since capacitance 30 belongs to energy-storage travelling wave tube, after the power-off of LED light 10, energy-storage travelling wave tube can discharge charge so that LED
Lamp generates the phenomenon that glimmer or flicker.In order to solve the above-mentioned technical problem, it is parallel with dissipative cell 40 on the capacitance 30.Its
In the dissipative cell 40 can be resistance.When capacitance 30 stores charge, electromotive force can be generated at 30 both ends of capacitance,
Electromotive force is generated at resistance both ends, and then resistance conductive and generates heat, passes through the electricity in the conversion consumption capacitance 30 of energy
Lotus reaches the technical issues of avoiding LED lamps 10 that glimmer or flicker occurs.
It has been investigated that when being more than 150uA by the current value of LED light 10, glimmer can occur for LED light 10 or flicker is existing
As；When being less than or equal to 150uA by the current value of LED light 10, LED lamps 10 then keep dark state.In order to ensure LED light
10 keep dark state after a loss of power, and the ratio between the operating voltage value of the capacitance and the resistance value of the resistance is less than 1.5*
10-4, you can it enables and 150uA is less than by the current value of LED lamps 10.
LED lamp drive circuit provided in this embodiment by being destroyed to the integral charge in LED lamp drive circuit or
Person allows the charge of integration that driving LED light is not achieved, and achievees the effect that avoid LED light that glimmer or scintillation occur when power is off.
Embodiments described above does not form the restriction to the technical solution protection domain.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements made within the spirit and principle of mode etc., should be included in the protection model of the technical solution
Within enclosing.
Claims (1)
1. a kind of LED lamp drive circuit that can be discharged dark current, it is characterised in that：Including LED light and for driving
State the driving power of LED light；Capacitance is parallel in the LED light；Resistance is parallel on the capacitance；The work of the capacitance
The ratio made between the resistance value of voltage value and the resistance is less than 1.5*10-4。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720851105.7U CN207543365U (en) | 2017-07-13 | 2017-07-13 | A kind of LED lamp drive circuit that can be discharged dark current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720851105.7U CN207543365U (en) | 2017-07-13 | 2017-07-13 | A kind of LED lamp drive circuit that can be discharged dark current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207543365U true CN207543365U (en) | 2018-06-26 |
Family
ID=62607639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720851105.7U Expired - Fee Related CN207543365U (en) | 2017-07-13 | 2017-07-13 | A kind of LED lamp drive circuit that can be discharged dark current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207543365U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110461071A (en) * | 2019-09-16 | 2019-11-15 | 杭州上达光电科技有限公司 | A kind of LED lamp protection circuit |
| CN110831286A (en) * | 2019-12-10 | 2020-02-21 | 厦门阳光恩耐照明有限公司 | Circuit and method for removing slight brightness of LED lamp and LED lamp |
-
2017
- 2017-07-13 CN CN201720851105.7U patent/CN207543365U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110461071A (en) * | 2019-09-16 | 2019-11-15 | 杭州上达光电科技有限公司 | A kind of LED lamp protection circuit |
| CN110831286A (en) * | 2019-12-10 | 2020-02-21 | 厦门阳光恩耐照明有限公司 | Circuit and method for removing slight brightness of LED lamp and LED lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180626 Termination date: 20200713 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |