CN206365077U - A kind of LED drive circuit of Brake lamp and position lamp multiplexing - Google Patents
A kind of LED drive circuit of Brake lamp and position lamp multiplexing Download PDFInfo
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- CN206365077U CN206365077U CN201621285157.4U CN201621285157U CN206365077U CN 206365077 U CN206365077 U CN 206365077U CN 201621285157 U CN201621285157 U CN 201621285157U CN 206365077 U CN206365077 U CN 206365077U
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Abstract
The utility model is related to Intelligent vehicle lamp technical field, more particularly to a kind of Brake lamp and the LED drive circuit of position lamp multiplexing, including diode PD1, anti-reverse diode SD1, anti-reverse diode SD2, voltage-stabiliser tube D1, triode Q1, NMOS tube SQ1, sampling resistor PR2, sampling resistor SR4 and LED light group.The utility model adjusts the size for flowing through LED current according to functional requirement, controls LED luminance, so as to realize that one group of LED realizes two kinds of difference in functionalitys of Brake lamp and position lamp respectively, reduces cost, practical, whole drive circuit is stable and reliable for performance, safety durable.
Description
Technical field
The utility model is related to Intelligent vehicle lamp technical field, more particularly to a kind of Brake lamp and position lamp multiplexing
LED drive circuit.
Background technology
In recent years, the fast development of LED technology, the advantages of by efficiency high, long lifespan, safe and environment-friendly etc., it applies model
Enclose increasingly wider, especially in automobile lamp lighting field, enjoy industry to favor.With the update of automobile, vapour is not only
The vehicle of car is more and more, and also species is various for the shape-designing of taillight, sometimes for moulding demand and cost reason, it is necessary to make
Dynamic lamp and position lamp work in the same position of taillight, have then occurred as soon as the design concept of Brake lamp and position lamp LED multiplexings.
It is known that the light that the Brake lamp and position lamp of taillight are sent all is feux rouges, difference is the brightness of Brake lamp
Brightness than position lamp is high, so the Brake lamp and position lamp of general taillight are all single use LED and realize Brake lamp and position
Put the function of lamp.But sometimes for cost-effective, the function of Brake lamp and position lamp can be realized simultaneously with one group of LED, in addition,
The practicality that increasing designer will not only pursue car light, which also has, is much intended to have big improvement in moulding, it is therefore an objective to allow
Taillight seems more to dazzle extremely, more high-grade, sometimes according to the demand of taillight moulding, it is also desirable to which Brake lamp and position lamp are in the same of taillight
One position works, therefore just occurs in that the requirement of taillight Brake lamp and position lamp LED multiplexings.
Because LED brightness is to flow through the size of LED current by changing and realize, the electric current for flowing through LED is bigger,
The light that LED is sent is brighter；Conversely, the electric current for flowing through LED is smaller, the light that LED is sent is darker.Therefore, Brake lamp is realized
With position lamp multiplexing, essence is the design of electronic circuit, flows through the size of LED current to realize Brake lamp and position by change
Put the function of lamp LED multiplexings.
Utility model content
The utility model provides the LED drive circuit that a kind of Brake lamp and position lamp are multiplexed so that taillight Brake lamp and
Position lamp can share LED, and the utility model adjusts the size for flowing through LED current according to functional requirement, controls LED luminance, from
And realize one group of LED and realize two kinds of difference in functionalitys of Brake lamp and position lamp respectively.
In order to realize the purpose of this utility model, the technical scheme used is：A kind of Brake lamp and position lamp multiplexing
LED drive circuit, including diode PD1, anti-reverse diode SD1, anti-reverse diode SD2, voltage-stabiliser tube D1, triode Q1,
NMOS tube SQ1, sampling resistor PR2, sampling resistor SR4 and LED light group, diode PD1 positive pole are connected with position lamp switch,
Diode PD1 negative pole is connected with voltage-stabiliser tube D1 positive pole, and triode Q1 base stage is connected with diode PD1 negative pole, three poles
Pipe Q1 colelctor electrode is connected with the negative pole of LED light group, and the positive pole of LED light group is connected with diode PD1 negative pole, triode Q1's
Emitter stage is connected with sampling resistor PR2 one end, and the sampling resistor PR2 other end is connected with voltage-stabiliser tube D1 negative pole, sampling electricity
Resistance SR4 one end is connected with triode Q1 emitter stage, and the sampling resistor SR4 other end is connected with NMOS tube SQ1 drain electrode,
NMOS tube SQ1 grid is connected with anti-reverse diode SD2 negative pole, anti-reverse diode SD2 positive pole and anti-reverse two pole
Pipe SD1 positive pole is connected with Brake lamp, and anti-reverse diode SD1 negative pole is connected with voltage-stabiliser tube D1 positive pole.
As prioritization scheme of the present utility model, the LED drive circuit of Brake lamp and position lamp multiplexing also includes resistance
PR1, resistance PR1 one end are connected with diode PD1 negative pole, and the resistance PR1 other end is connected with triode Q1 base stage.
As prioritization scheme of the present utility model, the LED drive circuit of Brake lamp and position lamp multiplexing also includes sampling electricity
PR3 is hindered, sampling resistor PR3 one end is connected with triode Q1 emitter stage, the sampling resistor PR3 other end is with voltage-stabiliser tube D1's
Negative pole is connected.
As prioritization scheme of the present utility model, the LED drive circuit of Brake lamp and position lamp multiplexing also includes sampling electricity
SR5 is hindered, sampling resistor SR5 one end is connected with triode Q1 emitter stage, sampling resistor the SR5 other end and NMOS tube SQ1
Drain electrode be connected.
As prioritization scheme of the present utility model, LED light group includes the LED lamp bead of some series connection.
The utility model has positive effect：1) the utility model flows through the electric current of LED light group to control by regulation
The brightness of LED light group, so as to realize the function of Brake lamp and rest lamp by one group of LED, reduces cost, practical；
2) the utility model carries out voltage stabilizing by voltage-stabiliser tube, and triode carries out constant current so that whole drive circuit performance is steady
It is fixed reliable, safety durable.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
As shown in figure 1, the utility model discloses the LED drive circuit that a kind of Brake lamp and position lamp are multiplexed, including two
Level pipe PD1, anti-reverse diode SD1, anti-reverse diode SD2, voltage-stabiliser tube D1, triode Q1, NMOS tube SQ1, sampling resistor
PR2, sampling resistor SR4 and LED light group, diode PD1 positive pole are connected with position lamp switch, diode PD1 negative pole with
Voltage-stabiliser tube D1 positive pole is connected, and triode Q1 base stage is connected with diode PD1 negative pole, triode Q1 colelctor electrode and LED
The negative pole of lamp group is connected, and the positive pole of LED light group is connected with diode PD1 negative pole, triode Q1 emitter stage and sampling resistor
PR2 one end is connected, and the sampling resistor PR2 other end is connected with voltage-stabiliser tube D1 negative pole, sampling resistor SR4 one end and three poles
Pipe Q1 emitter stage is connected, and the sampling resistor SR4 other end is connected with NMOS tube SQ1 drain electrode, and NMOS tube SQ1 grid is with preventing
Reversal connection diode SD2 negative pole is connected, anti-reverse diode SD2 positive pole and anti-reverse diode SD1 positive pole with braking
Lamp is connected, and anti-reverse diode SD1 negative pole is connected with voltage-stabiliser tube D1 positive pole.Wherein, voltage-stabiliser tube D1 serves the work of voltage stabilizing
With stable electric current being provided for LED light group by triode Q1, sampling resistor PR2 and sampling resistor SR4 play regulation electric currents
Effect, when being switched to Brake lamp function from position lamp, NMOS tube SQ1 is opened, the reduction of the overall resistance of sampling resistor, is flowed through
The electric current increase of LED light group so that the electric current of LED light group reaches the brightness of Brake lamp, realizes the function of Brake lamp.
Brake lamp and the LED drive circuit of position lamp multiplexing also include resistance PR1, resistance PR1 one end and diode PD1
Negative pole be connected, the resistance PR1 other end is connected with triode Q1 base stage.
Brake lamp and position lamp multiplexing LED drive circuit also include sampling resistor PR3, sampling resistor PR3 one end with
Triode Q1 emitter stage is connected, and the sampling resistor PR3 other end is connected with voltage-stabiliser tube D1 negative pole.
Brake lamp and position lamp multiplexing LED drive circuit also include sampling resistor SR5, sampling resistor SR5 one end with
Triode Q1 emitter stage is connected, and the sampling resistor SR5 other end is connected with NMOS tube SQ1 drain electrode.
LED light group includes the LED lamp bead of some series connection.
As shown in figure 1, when being operated in position lamp state, electric current flows through voltage-stabiliser tube D1 by diode PD1, LED light group,
Triode Q1-Q3, most sampling resistor PR2-PR7, Zhongdao；And Brake lamp part passes through anti-reverse diode SD1 so that braking
The NMOS tube SQ1 of lamp part does not work, so that sampling resistor SR4-SR9 does not also work, now the electric current in LED light group
Only it is adjusted by sampling resistor PR2-PR7.
When being switched to Brake lamp function, electric current flows through voltage-stabiliser tube D1, LED, triode by anti-reverse diode SD1
Q1-Q3, most sampling resistor PR2-PR7, Zhongdao, electric current opens NMOS tube SQ1 by anti-reverse diode SD2 simultaneously so that
Resistance SR4-SR9 normal works, now the electric current in LED light group by position lamp part sampling resistor PR2-PR7 and Brake lamp
Partial sampling resistor SR4-SR9 adjusts control jointly.
By taking Q1 branch roads as an example, in position lamp function, the electric current in LED light group is by sampling resistor PR2 and sampling resistor PR3
It is adjusted, sampling resistor PR2 and sampling resistor PR3 resistance are 20 Ω, by sampling resistor PR2's and sampling resistor PR3
Effective resistance is designated as R1, and R1 resistance is 10 Ω, and the electric current for now flowing through LED light group is 58mA；When switching to Brake lamp function
When, the electric current on LED is adjusted by sampling resistor PR2, sampling resistor PR3, sampling resistor SR4, sampling resistor SR5, is sampled
The resistance that resistance PR2 and sampling resistor PR3 resistance are 20 Ω, sampling resistor SR4 and sampling resistor SR5 is 10 Ω, will
Sampling resistor PR2, sampling resistor PR3, sampling resistor SR4, sampling resistor SR5 effective resistance are designated as R2, and R2 resistance is 3.3
Ω, the electric current for now flowing through LED light group is 137mA.As can be seen here, R1 resistance is made to be more than R2 resistance by setting so that
Flowed through in position lamp function LED light group for low current, flowed through in Brake lamp function LED light group for high current so that
Realize the function of one group of LED Brake lamp and position lamp multiplexing.
Particular embodiments described above, has carried out entering one to the purpose of this utility model, technical scheme and beneficial effect
Step is described in detail, be should be understood that and be the foregoing is only specific embodiment of the utility model, is not limited to this
Utility model, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvements done etc. all should be wrapped
It is contained within protection domain of the present utility model.
Claims (5)
1. a kind of Brake lamp and the LED drive circuit of position lamp multiplexing, it is characterised in that：Including diode PD1, anti-reverse two pole
Pipe SD1, anti-reverse diode SD2, voltage-stabiliser tube D1, triode Q1, NMOS tube SQ1, sampling resistor PR2, sampling resistor SR4 and
LED light group, diode PD1 positive pole is connected with position lamp switch, diode PD1 negative pole and voltage-stabiliser tube D1 positive pole phase
Even, triode Q1 base stage is connected with diode PD1 negative pole, and triode Q1 colelctor electrode is connected with the negative pole of LED light group,
The positive pole of LED light group is connected with diode PD1 negative pole, and triode Q1 emitter stage is connected with sampling resistor PR2 one end, adopts
The sample resistance PR2 other end is connected with voltage-stabiliser tube D1 negative pole, sampling resistor SR4 one end and triode Q1 emitter stage phase
Even, the sampling resistor SR4 other end is connected with NMOS tube SQ1 drain electrode, NMOS tube SQ1 grid and anti-reverse diode SD2
Negative pole be connected, anti-reverse diode SD2 positive pole and anti-reverse diode SD1 positive pole are connected with Brake lamp, anti-reverse
Diode SD1 negative pole is connected with voltage-stabiliser tube D1 positive pole.
2. a kind of Brake lamp according to claim 1 and the LED drive circuit of position lamp multiplexing, it is characterised in that：It is described
Brake lamp and the LED drive circuit of position lamp multiplexing also include resistance PR1, resistance PR1 one end and diode PD1 negative pole phase
Even, the resistance PR1 other end is connected with triode Q1 base stage.
3. a kind of Brake lamp according to claim 1 or 2 and the LED drive circuit of position lamp multiplexing, it is characterised in that：Institute
Stating the LED drive circuit of Brake lamp and position lamp multiplexing also includes sampling resistor PR3, sampling resistor PR3 one end and triode
Q1 emitter stage is connected, and the sampling resistor PR3 other end is connected with voltage-stabiliser tube D1 negative pole.
4. a kind of Brake lamp according to claim 1 or 2 and the LED drive circuit of position lamp multiplexing, it is characterised in that：Institute
Stating the LED drive circuit of Brake lamp and position lamp multiplexing also includes sampling resistor SR5, sampling resistor SR5 one end and triode
Q1 emitter stage is connected, and the sampling resistor SR5 other end is connected with NMOS tube SQ1 drain electrode.
5. a kind of Brake lamp according to claim 1 or 2 and the LED drive circuit of position lamp multiplexing, it is characterised in that：Institute
The LED light group stated includes the LED lamp bead of some series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621285157.4U CN206365077U (en) | 2016-11-28 | 2016-11-28 | A kind of LED drive circuit of Brake lamp and position lamp multiplexing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621285157.4U CN206365077U (en) | 2016-11-28 | 2016-11-28 | A kind of LED drive circuit of Brake lamp and position lamp multiplexing |
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| Publication Number | Publication Date |
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| CN206365077U true CN206365077U (en) | 2017-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621285157.4U Active CN206365077U (en) | 2016-11-28 | 2016-11-28 | A kind of LED drive circuit of Brake lamp and position lamp multiplexing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108124336A (en) * | 2016-11-28 | 2018-06-05 | 常州星宇车灯股份有限公司 | A kind of Brake lamp and the LED drive circuit of position lamp multiplexing |
-
2016
- 2016-11-28 CN CN201621285157.4U patent/CN206365077U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108124336A (en) * | 2016-11-28 | 2018-06-05 | 常州星宇车灯股份有限公司 | A kind of Brake lamp and the LED drive circuit of position lamp multiplexing |
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