CN108990207A - A kind of automobile-used headlight distance-light switching drive scheme of nonpolarity LED - Google Patents
A kind of automobile-used headlight distance-light switching drive scheme of nonpolarity LED Download PDFInfo
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- CN108990207A CN108990207A CN201810625718.8A CN201810625718A CN108990207A CN 108990207 A CN108990207 A CN 108990207A CN 201810625718 A CN201810625718 A CN 201810625718A CN 108990207 A CN108990207 A CN 108990207A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The present invention is a kind of automobile-used headlight distance-light switching drive scheme of nonpolarity LED, including input rectifying protection circuit, distance-light control switching circuit and LED light group constant-current drive circuit；The input rectifying protection circuit includes the port JG, the port YG, COM port, DL1, DL2, D1, D3, C1；The distance-light control switching circuit is divided into dipped beam lamp group switching circuit and distance light lamp group switching circuit；The constant-current drive circuit is also classified into dipped beam lamp group and distance light lamp group；The advantages of such automobile-used headlight distance-light switching drive scheme of nonpolarity LED realizes that device is few while guaranteeing performance, the LED headlight miniaturized products of at low cost, miniaturization, nonpolarity input, versatile LED driving and built-in driving.
Description
Technical field
The present invention is a kind of automobile-used headlight distance-light switching constant current drive scheme of LED, is particularly suitable for minimizing electrodeless
Property input the automobile-used headlight distance-light switching control constant current drive scheme of LED, belong to electronic technology field.
Background technique
The automotive headlamp of electric vehicle to automobile is the important component for ensureing safety traffic.When vehicle driving is in insufficient light
Or dark road conditions environment, driver are to ensure to drive safely to must be turned on headlight, road environment meets and does not influence other people
When member and vehicle pass-through, to ensure that traffic safety must open high beam, the more environment of the personnel such as meeting and street must be cut when driving
Dipped headlight unlatching is changed, to ensure other vehicles and walk safety.
The automobile-used headlight of LED is that occur quickly being popularized because of its plurality of advantages by electric vehicle, automobile application in recent years.It includes
Energy conservation and environmental protection, the long-life, high brightness, invariable power, low light attenuation, high photosynthetic efficiency, shape is beautiful, light type is good, the built-in driving COB lamp of lamp cap
The LED common bulb of pearl one aluminum substrate encapsulation can directly replace halogen bulb, and replacement is convenient.Existing driving circuit: by bearing
Control or positive control circuit realize the switching control of distance-light lamp group；Corresponding terminals require stringent, positive and negative control Universal driving circuit by more
Chips, more switch metal-oxide-semiconductors, triode, multiple inductance, multiple drivings are combined into a drive control circuit, realize far and near
Light switching or the size for changing load current reach strong and weak light (brightness) control.Deficiency is by electronic device that driving circuit forms
It is more, circuit is complicated, it is at high cost, connect electric mistake easily hair accident, driving volume is big, cannot achieve it is universal it is built-in drive it is common
The disadvantages of LED headlamp product, LED headlight need to differentiate positive and negative control, operability, poor universality when replacing.
Summary of the invention
It is remote to propose a kind of automobile-used headlight of nonpolarity LED for the deficiency of the automobile-used headlight driving of existing LED by the present invention
Drive scheme is simplified in dipped beam switching, realizes driving miniaturization, safe, general, efficient, high performance-price ratio.
To solve the above problems, the present invention adopts the following technical scheme:
A kind of automobile-used headlight distance-light of nonpolarity LED switches drive scheme, including input rectifying protection circuit (A1), remote
Dipped beam control switching circuit (A2) and LED light group constant-current drive circuit (A3).
Further, described input rectifying protection circuit (A1) include the port JG, the port YG, COM port, DL1, DL2,
D1、D3、C1。
Further, the port JG connects DL1 cathode, DL2 anode, and DL1 plus earth, DL2 cathode external power supply are just
Pole；The input terminal of the port YG and COM port connects two input terminals of D1 respectively；The D1 negative pole end ground connection, anode terminate D3's
Anode, D3 cathode external power supply anode, external power supply positive and negative polarities are distinguished at decoupling capacitance the two poles of the earth of C1.
Further, two ac input ends that it is D1 that the input terminal of the port YG and COM port, which is respectively connected to,.
Further, the distance-light control switching circuit (A2) is divided into dipped beam lamp group switching circuit and the switching of distance light lamp group
Circuit；The dipped beam lamp group switching circuit and distance light lamp group switching circuit are divided into independent switching control scheme and dipped beam is always on, far
Switching control scheme is opened on demand/closed to light.
Further, when the dipped beam lamp group switching circuit and distance light lamp group switching circuit are independent switching control scheme,
Including dipped beam control switching circuit DS3, RJ1, RJ2, QJ, distance light control switching circuit RY1, RY2, DS4, QY；
The DS3 anode of the dipped beam control switching circuit connects the pole GATE of JG, and DS3 cathode connects the pole D of QY, outside the one end RJ1
Positive pole is connect, the pole GATE, the both ends RJ2 of another termination QJ of RJ1 connect the pole GATE and the pole S of QJ respectively；
The D1 anode of the distance light control switching circuit connects the one end RY1, the pole GATE of another termination DS4 anode of RY1, QY,
DS4 cathode connects the end JG, and the both ends RY2 connect the pole GATE and the pole S of QY respectively.
Further, the dipped beam lamp group switching circuit and distance light lamp group switching circuit are that dipped beam is always on, distance light is opened on demand
When opening/close switching control scheme, device DS3, RJ1, RJ2, QJ are omitted unlike independent switching control scheme, retains
Distance light control switching circuit includes that RY1, RY2, DS4, QY:D1 anode connect the one end RY1, RY1 another termination DS4 anode, QY
The pole GATE, DS4 cathode connect the end JG, and the both ends RY2 connect the pole GATE and the pole S of QY respectively.
Further, the constant-current drive circuit (A3) is also classified into dipped beam lamp group and distance light lamp group；The dipped beam lamp group and
High beam group is divided into independent switching control scheme and dipped beam is always on, switching control scheme is opened on demand/closed to distance light.
Further, include when the dipped beam lamp group and distance light lamp group are independent switching control scheme LED1, LED2, QJ,
QY,L1,D2,R1,R2,C2,IC；
Positive pole connects LED1 anode, LED2 anode, the one end R2, and LED1 cathode connects the pole D of QJ, and the pole S of QJ connects L1 input
End, LED2 cathode connect the pole D of QY, and the pole S of QY meets L1 input terminal, No. 1 foot of another termination C2, IC of R2, C2 other end ground connection, IC
2,3, No. 4 feet ground connection, No. 6 feet of IC connect L1 output end, D2 anode, No. 5 one end Jiao JieR1 of IC, R1 other end ground connection, D2
Cathode connects positive pole.
Further, the dipped beam lamp group and distance light lamp group are that dipped beam lamp group is always on, distance light lamp group opens or closes on demand
When switching control scheme, including LED1, LED2, QY, L1, D2, R1, R2, C2, IC: positive pole connects LED1 anode, LED2 sun
Pole, the one end R2, LED1 cathode connect the pole S of QY, and LED2 cathode connects the pole D of QY, and the pole S of QY connects L1 input terminal, another termination C2 of R2,
No. 1 foot of IC, C2 other end ground connection, 2,3, No. 4 feet ground connection of IC, No. 6 feet of IC connect L1 output end, D2 anode, No. 5 feet of IC
The one end R1, R1 other end ground connection are connect, D2 cathode connects positive pole.
The beneficial effects of the present invention are:
Only with a low level clamp diode and an isolating diode, remaining circuit and positive control driving circuit are completely logical
With being achieved that the repertoire of negative control long-and-short distant light switching current constant control；It is realized using one group of rectifier bridge and diode combinations
Nonpolarity safety input；The switching of LED distance-light lamp group is realized with few device solution, current constant control repertoire, is protected
Realize while demonstrate,proving performance: device is few, at low cost, miniaturization, nonpolarity input, versatile LED driving and built-in driving
LED headlight miniaturized products.
Detailed description of the invention:
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, described attached drawing is of the invention
A part of the embodiment, rather than whole embodiments, those skilled in the art are obtained without creative efforts
The other embodiments obtained, belong to the scope of protection of the invention.In addition, be previously mentioned in text it is all connect, connect, connecting relation,
Not singly refer to that component directly connects, and referring to can be according to specific implementation situation, by adding or reducing couple auxiliary, to form it
His coupling structure (such as: LED light group can be lamp bead or COB encapsulation by various combination in series or in parallel with each other as needed Lai
Realize LED lamplight load, replace other driving chips etc.).Each technical characteristic in the invention, in not conflicting punching
It can be with combination of interactions under the premise of prominent.
Fig. 1 is the general principles block diagram that the automobile-used headlight distance-light of nonpolarity LED switches drive scheme；
Fig. 2 is the driver circuit schematic diagram of distance light lamp group and dipped beam lamp group independence switching control scheme；
Fig. 3 be dipped beam lamp group be always on, the driver circuit schematic diagram of the on-demand on/off switch control program of distance light lamp group.
In figure: A1- input rectifying protects circuit, A2- distance-light control switching circuit, A3-LED lamp group constant current driving electricity
Road, JG- dipped beam input port, YG- distance light input port, COM- common wire input port, DS4, DS3- clamp diode, DL1,
DL2- dipped beam end rectifier diode, the public input terminal rectifier bridge of D1-, D2- afterflow Schottky diode, the optical rectification of D3- distance every
From diode, C1- power filtering capacitor, C2- chip filter capacitor, IC- current constant control chip, R1- current sampling resistor, R2-
Chip power (using when Width funtion, low-voltage can be cancelled) inputs divider resistance, L1- afterflow inductance, QY- high beam switching switch
It manages (N-type metal-oxide-semiconductor), the upper biasing resistor of RY1-QY, RY2-QY below-center offset resistance, QJ- dipped headlight switches switching tube (N-type metal-oxide-semiconductor),
The upper biasing resistor of RJ1-QJ, RJ2-QJ below-center offset resistance, LED1- dipped beam lamp group, LED2- distance light lamp group.
Specific embodiment
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Refering to shown in figure one, a kind of nonpolarity automobile-used headlight distance-light switching drive scheme of LED, including input rectifying are protected
Protection circuit A1, distance-light control switching circuit A2 and LED light group constant-current drive circuit A3.
It includes JG, COM, YG, DL1, DL2, D1, D3, C1 that input rectifying, which protects circuit A1,；The port JG connect DL1 cathode,
DL2 anode, DL1 plus earth (driving power cathode), DL2 cathode connect positive pole (driving power anode), COM port, YG
Port connects two ac input ends of D1 respectively, and D1 output cathode terminates D3 anode, and the cathode of D3 connects positive pole, and D1 bridge heap is negative
Pole connects power ground (driving power cathode), and C1 decoupling capacitance positive and negative anodes connect the power positive cathode of driving circuit.
Distance-light control switching circuit A2 includes:
Dipped beam lamp group switching circuit and distance light lamp group switching circuit；The dipped beam lamp group switching circuit and the switching of distance light lamp group
Circuit is divided into independent switching control scheme and dipped beam is always on, switching control scheme is opened on demand/closed to distance light.
When the dipped beam lamp group switching circuit and distance light lamp group switching circuit are independent switching control scheme, including dipped beam is cut
Change control circuit DS3, RJ1, RJ2, QJ, distance light control switching circuit RY1, RY2, DS4, QY；
The DS3 anode of the dipped beam control switching circuit connects the pole GATE of JG, and DS3 cathode connects the pole D of QY, outside the one end RJ1
Positive pole is connect, the pole GATE, the both ends RJ2 of another termination QJ of RJ1 connect the pole GATE and the pole S of QJ respectively；
The D1 anode of the distance light control switching circuit connects the one end RY1, the pole GATE of another termination DS4 anode of RY1, QY,
DS4 cathode connects the end JG, and the both ends RY2 connect the pole GATE and the pole S of QY respectively；
The dipped beam lamp group switching circuit and distance light lamp group switching circuit are that dipped beam is always on, distance light on demand cut by unlatching/closing
When changing control program, device DS3, RJ1, RJ2, QJ are omitted unlike independent switching control scheme, retains distance light switching
Control circuit includes that RY1, RY2, DS4, QY:D1 anode meet the one end RY1, the pole GATE of another termination DS4 anode of RY1, QY, DS4
Cathode connects the end JG, and the both ends RY2 connect the pole GATE and the pole S of QY respectively.
Constant-current drive circuit A3 includes:
Dipped beam lamp group and distance light lamp group；The dipped beam lamp group and high beam group are divided into independent switching control scheme and dipped beam is normal
Switching control scheme is opened on demand/closed to bright, distance light.
The dipped beam lamp group, distance light lamp group can be composed of LED lamp bead or COB lamp bead；The LED lamp bead and COB lamp
Pearl can be single or two or more.
The dipped beam lamp group and distance light lamp group include when being independent switching control scheme LED1, LED2, QJ, QY, L1, D2,
R1,R2,C2,IC；
Positive pole connects LED1 anode, LED2 anode, the one end R2, and LED1 cathode connects the pole D of QJ, and the pole S of QJ connects L1 input
End, LED2 cathode connect the pole D of QY, and the pole S of QY meets L1 input terminal, No. 1 foot of another termination C2, IC of R2, C2 other end ground connection, IC
2,3, No. 4 feet ground connection, No. 6 feet of IC connect L1 output end, D2 anode, No. 5 one end Jiao JieR1 of IC, R1 other end ground connection, D2
Cathode connects positive pole；
The dipped beam lamp group and distance light lamp group are that dipped beam lamp group is always on, distance light lamp group opens or closes switching control side on demand
When case, including LED1, LED2, QY, L1, D2, R1, R2, C2, IC: positive pole connects LED1 anode, LED2 anode, the one end R2,
LED1 cathode connects the pole S of QY, and LED2 cathode connects the pole D of QY, and the pole S of QY connects L1 input terminal, No. 1 foot of another termination C2, IC of R2,
C2 other end ground connection, 2,3, No. 4 feet ground connection of IC, No. 6 feet of IC connect L1 output end, D2 anode, No. 5 one end Jiao JieR1 of IC,
R1 other end ground connection, D2 cathode connect positive pole.
The present invention mainly uses:
(1) input rectifying protects circuit A1 working principle: by the random polarity inversions of COM, JG, YG input port, through D1, DL1,
DL2 bridge circuit safety is rectified into orderly anode, cathode, does power supply after decoupling by C1, rectifies control level in JG using D3
When input be isolated the cathode circuit intercommunication of distance light side, it is ensured that distance light switch switching tube QY will not therefore false triggering abnormal start-up；
(2) distance-light control switching circuit A2 working principle: have in public COM input cathode (negative altogether) circuit: the end YG
Open circuit, establishes power supply by (A1) circuit when JG rectifies pole, and dipped beam switches the pole GATE of switching tube QJ by power supply forward bias
Conducting, the controlled system of dipped beam lamp group are opened, and the pole pipe GATE QY does not obtain high level because of D3 buffer action and is biased off, distance light lamp group
It is closed by interlocking；Similarly, the end JG is opened a way, and establishes power supply by (A1) circuit when YG rectifies pole, and distance light switches switching tube QY's
The pole GATE provides forward bias conducting by D1 anode, and the controlled system of distance light lamp group is opened, the pole pipe GATE QJ be clamped because DS3 is connected for
Low level is biased and is turned off, and dipped beam lamp group is closed by interlocking；
(3) has in public COM input anode (altogether just) circuit: the end YG is opened a way, and when end JG cathode is built by (A1) circuit
Power supply is found, the pole GATE of dipped beam switching switching tube QJ is connected by power supply forward bias, and the controlled system of dipped beam lamp group is opened, QY pipe
The pole GATE is turned off because DS4 conducting is clamped as low level biasing, and distance light lamp group is closed by interlocking；Similarly, the end JG is opened a way, the end YG
Power supply is established by (A1) circuit when cathode, the pole GATE of distance light switching switching tube QY provides forward bias by D1 anode and leads
Logical, the controlled system of distance light lamp group is opened, and the pole pipe GATE QJ is turned off because DS3 conducting is clamped as low level biasing, dipped beam lamp group quilt
Interlocking is closed；
(4) (A3) LED light group constant-current drive circuit working principle: power supply is established by (A1) circuit, anode passes through R2
Partial pressure, connects the operating voltage that pressure stabilizing offer IC is stable inside 1 foot of IC chip at C2 decoupling, and chip is in normal operating conditions, power supply
Anode is powered to distance-light LED load simultaneously, and electric current passes through the pole D of QJ (or QY) through positive pole again by LED1 (or LED2)
It is driven by the input terminal of L1 into 6 feet (pole D of built-in N-type metal-oxide-semiconductor) for reaching IC driving chip, IC is brought out from output with the pole S
Chip interior presses specific switching frequency, carries out PWM according to the current sample level at the 5th foot of chip (pole built-in metal-oxide-semiconductor S) end R1
Regulation, when the 5th foot level is less than constant current cut-off level, PWM opens period forward position and carries out PWM regulation conducting to built-in metal-oxide-semiconductor,
Load circuit electric current is through anode, LED1, QJ, L1 inductance (inductance gets up energy storage is obtained at this time), 6 feet, the IC of IC chip
5 foot of chip, R1 to ground, LED operation lamp group are lighted, while IC chip obtains corresponding current signal level from the sampling of the 5th foot and reaches
When limit value, IC is immediately turned off when regulating and controlling failing edge by PWM pulsewidth to internal metal-oxide-semiconductor, is stored in inductance L1 during this shutdown
Energy feed back to positive pole through D2 conducting from inductance L1 output end, and pass through and correspond to the LED light group of work at this time and load back
Road return to inductance input terminal (inductive current turn off during obtained by inductance counter electromotive force principle: at this time the input terminal of inductance be cathode,
Output end is anode), it is completed and is released by continuous current circuit, keep the load current of LED light group steady in CC (continuous current) mode
Fixed work；In the level signal that the turn-on cycle of next PWM, IC are detected according to 5 feet, regulated and controled by PWM pulsewidth to internal MOS
Pipe completes the loop control to inductive switch, completes continuous reliable constant current drive control work；Chip interior is protected with excess temperature
Protection circuit can reduce corresponding output electric current when detecting that temperature anomaly is higher automatically and protect circuit and load；Driving electricity
Road has efficiently accomplished corresponding distance-light switching and LED under corresponding input control state, through circuit theory shown in figure one
The current constant control of lamp group load realizes stable, efficient LED lamplight switching and illumination work.
Refering to shown in figure two, shown in comparison diagram one, the device of circuit optimization reduction includes: RJ1, RJ2, DS3, QJ；Except subtracting
Outside few device, it is a difference in that the cathode of LED1 has been directly connected to the input terminal of L1.
The present embodiment working principle only illustrate with figure one shown in difference, in conjunction with market apply LED headlamp dipped beam
Lamp group is always on, distance light lamp group opens or closes operating mode on demand: dipped headlight LED load circuit, as long as known to circuit theory
When driving power normally establishes acquisition, IC chip, which begins to current constant control, makes LED1 dipped beam lamp group circuit be constantly in normal work
State；High beam working principle and specific implementation case described in circuit shown in figure one are completely the same, and working principle is identical.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The change or replacement expected without creative work, should be covered by the protection scope of the present invention.Therefore, of the invention
Protection scope should be determined by the scope of protection defined in the claims.
Claims (10)
1. a kind of automobile-used headlight distance-light of nonpolarity LED switches drive scheme, it is characterised in that: protect electricity including input rectifying
Road (A1), distance-light control switching circuit (A2) and LED light group constant-current drive circuit (A3).
2. a kind of nonpolarity automobile-used headlight distance-light of LED according to claim 1 switches drive scheme, feature exists
In: input rectifying protection circuit (A1) includes the port JG, the port YG, COM port, DL1, DL2, D1, D3, C1.
3. a kind of nonpolarity automobile-used headlight distance-light of LED according to claim 2 switches drive scheme, feature exists
In: the port JG connects DL1 cathode, DL2 anode, DL1 plus earth, DL2 cathode external power supply anode；The port YG and COM
The input terminal of port connects two input terminals of D1 respectively；The D1 negative pole end ground connection, anode terminate the anode of D3, and D3 cathode is external
Distinguish external power supply positive and negative polarities in decoupling capacitance the two poles of the earth of positive pole, C1.
4. a kind of nonpolarity automobile-used headlight distance-light of LED according to claim 2 switches drive scheme, feature exists
In: two ac input ends that it is D1 that the input terminal of the port YG and COM port, which is respectively connected to,.
5. a kind of nonpolarity automobile-used headlight distance-light of LED according to claim 1 switches drive scheme, feature exists
In: the distance-light control switching circuit (A2) is divided into dipped beam lamp group switching circuit and distance light lamp group switching circuit；The dipped beam
Lamp group switching circuit and distance light lamp group switching circuit are divided into independent switching control scheme and dipped beam is always on, distance light unlatching/pass on demand
Close switching control scheme.
6. a kind of nonpolarity automobile-used headlight distance-light of LED according to claim 5 switches drive scheme, feature exists
When: the dipped beam lamp group switching circuit and distance light lamp group switching circuit are independent switching control scheme, including dipped beam switching control
Circuit DS3, RJ1, RJ2, QJ processed, distance light control switching circuit RY1, RY2, DS4, QY；
The DS3 anode of the dipped beam control switching circuit connects the pole GATE of JG, and DS3 cathode connects the pole D of QY, the external electricity in the one end RJ1
Source anode, the pole GATE, the both ends RJ2 of another termination QJ of RJ1 connect the pole GATE and the pole S of QJ respectively；
The D1 anode of the distance light control switching circuit connects the one end RY1, the pole GATE of another termination DS4 anode of RY1, QY, DS4 yin
Pole connects the end JG, and the both ends RY2 connect the pole GATE and the pole S of QY respectively.
7. a kind of nonpolarity automobile-used headlight distance-light of LED according to claim 5 switches drive scheme, feature exists
In, the dipped beam lamp group switching circuit and distance light lamp group switching circuit be dipped beam be always on, distance light open on demand/close switching control
When scheme, device DS3, RJ1, RJ2, QJ are omitted unlike independent switching control scheme, retains distance light switching control electricity
Road includes that RY1, RY2, DS4, QY:D1 anode connect the one end RY1, the pole GATE of another termination DS4 anode of RY1, QY, and DS4 cathode connects
The end JG, the both ends RY2 connect the pole GATE and the pole S of QY respectively.
8. a kind of nonpolarity automobile-used headlight distance-light of LED according to claim 1 switches drive scheme, feature exists
In the constant-current drive circuit (A3) is divided into dipped beam lamp group and distance light lamp group；The dipped beam lamp group and high beam group are divided into independence
Switching control scheme and dipped beam are always on, switching control scheme is opened on demand/closed to distance light.
9. a kind of nonpolarity automobile-used headlight distance-light of LED according to claim 8 switches drive scheme, feature exists
Include when, the dipped beam lamp group and distance light lamp group are independent switching control scheme LED1, LED2, QJ, QY, L1, D2, R1, R2,
C2,IC；
Positive pole connects LED1 anode, LED2 anode, the one end R2, and LED1 cathode connects the pole D of QJ, and the pole S of QJ connects L1 input terminal,
LED2 cathode connects the pole D of QY, and the pole S of QY connects L1 input terminal, No. 1 foot of another termination C2, IC of R2, and the C2 other end is grounded, IC's
2,3, No. 4 foot ground connection, No. 6 feet of IC connect L1 output end, D2 anode, No. 5 one end Jiao JieR1 of IC, R1 other end ground connection, D2 yin
Pole connects positive pole.
10. a kind of nonpolarity automobile-used headlight distance-light of LED according to claim 8 switches drive scheme, feature exists
In, when the dipped beam lamp group and distance light lamp group are that dipped beam lamp group is always on, distance light lamp group opens or closes switching control scheme on demand,
Including LED1, LED2, QY, L1, D2, R1, R2, C2, IC: positive pole connects LED1 anode, LED2 anode, the one end R2, LED1 yin
Pole connects the pole S of QY, and LED2 cathode connects the pole D of QY, and the pole S of QY connects L1 input terminal, No. 1 foot of another termination C2, IC of R2, and C2 is another
End ground connection, 2,3, No. 4 feet ground connection of IC, No. 6 feet of IC connect L1 output end, D2 anode, No. 5 one end Jiao JieR1 of IC, and R1 is another
End ground connection, D2 cathode connect positive pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810625718.8A CN108990207A (en) | 2018-06-18 | 2018-06-18 | A kind of automobile-used headlight distance-light switching drive scheme of nonpolarity LED |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810625718.8A CN108990207A (en) | 2018-06-18 | 2018-06-18 | A kind of automobile-used headlight distance-light switching drive scheme of nonpolarity LED |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110708818A (en) * | 2019-06-19 | 2020-01-17 | 深圳市青蓝半导体有限公司 | Far and near light car lamp control circuit and lighting device based on linear constant current |
| CN115177829A (en) * | 2022-07-18 | 2022-10-14 | 吉林大学 | Monitoring device and method for controlling breath continuity and breath sound |
-
2018
- 2018-06-18 CN CN201810625718.8A patent/CN108990207A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110708818A (en) * | 2019-06-19 | 2020-01-17 | 深圳市青蓝半导体有限公司 | Far and near light car lamp control circuit and lighting device based on linear constant current |
| CN115177829A (en) * | 2022-07-18 | 2022-10-14 | 吉林大学 | Monitoring device and method for controlling breath continuity and breath sound |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181211 |
|
| WD01 | Invention patent application deemed withdrawn after publication |