CN206264885U - Automobile front - Google Patents
Automobile front Download PDFInfo
- Publication number
- CN206264885U CN206264885U CN201621266912.4U CN201621266912U CN206264885U CN 206264885 U CN206264885 U CN 206264885U CN 201621266912 U CN201621266912 U CN 201621266912U CN 206264885 U CN206264885 U CN 206264885U
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- Prior art keywords
- led
- switching tube
- beam light
- low
- high beams
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Abstract
The utility model discloses a kind of automobile front, including the LED low-beam light that is one another in series and LED high beams, the negative electrode of LED low-beam light is connected with the anode of LED high beams, the minus earth of LED high beams；Wherein, the automobile front also includes inductance and switching tube；One end of inductance is connected to the common node of LED low-beam light and LED high beams, and the other end of inductance is connected with the first conduction terminal of switching tube；Second conduction terminal of switching tube is connected with the negative electrode of LED high beams, and the control end of switching tube is used to receive the pwm control signal of outside input.The utility model can effectively suppress the current spike of LED low-beam light, and circuit structure and control all very simples when low-beam function is switched to by road function, and the reduction of product operating efficiency and the variation of hot property are not resulted in yet when current spike is suppressed.
Description
Technical field
The utility model is related to automotive lighting technology, more particularly to automobile front.
Background technology
Fig. 1 shows the circuit theory schematic diagram of existing automobile front.As shown in figure 1, existing automobile front
Including LED low-beam light LB and LED high beam HB, resistance R2, first switch pipe Q1 and second switch that common cathode links together
Pipe Q2.One end of resistance R2 is connected with the anode of LED low-beam light LB, and the other end of resistance R2 is led with the first of first switch pipe Q1
Go side connects, the second conduction terminal ground connection of first switch pipe Q1.First conduction terminal of second switch pipe Q2 is connected to LED low-beam light
The common node of LB and LED high beams HB, second conduction terminal of second switch pipe Q2 is connected with the negative electrode of LED high beams HB.The
The control end of one switching tube Q1 and second switch pipe Q2 is respectively used to receive the pwm control signal from controller, to realize opening
Close the turn-on and turn-off of pipe.
When second switch pipe Q2 is turned on, only LED low-beam light LB is lighted, so as to realize the low-beam function of automobile front；
When second switch pipe Q2 is turned off, LED low-beam light LB and LED high beam HB is lighted, so as to realize the distance light of automobile front
Function.When low-beam function is switched to by road function, because the pwm control signal of control second switch pipe Q2 is in low and high level
Voltage can not be mutated during switching, and the electric current for flowing through LED low-beam light LB can be caused to produce a current spike, and the current spike is excessive
When LED can be caused to damage.In order to suppress current spike, existing way is before second switch pipe Q2 conductings, first to allow first
Switching tube Q1 is turned on, and the input terminal voltage of the series arm that LED low-beam light LB and LED high beam HB is constituted is put by resistance R2
To ground, so, when second switch pipe Q2 is opened, the current spike of LED low-beam light LB is weakened part electricity.
The existing this circuit for suppressing current spike has the drawback that：1st, energy causes product by resistance consumption
Efficiency reduction, hot property is deteriorated；2nd, need to take controller（Controller is usually single-chip microcomputer）Two I/O mouthfuls control two
The sequential of switching tube, for different loads and different electric currents when same peak current effect is reached, during required electric discharge
Between it is also different.
The content of the invention
Technical problem to be solved in the utility model is to provide one kind to be switched to dipped beam work(by road function
Effectively suppress the automobile front of the current spike of LED low-beam light during energy, its circuit structure and control are all simpler, and in suppression
The reduction of product operating efficiency and the variation of hot property are not resulted in during current spike processed.
In order to solve the above technical problems, a kind of automobile front of the utility model embodiment offer, including be one another in series
LED low-beam light and LED high beams, the negative electrode of LED low-beam light are connected with the anode of LED high beams, and the negative electrode of LED high beams connects
Ground；Wherein, the automobile front also includes inductance and switching tube；One end of inductance is connected to LED low-beam light and LED high beams
Common node, the other end of inductance is connected with the first conduction terminal of switching tube；Second conduction terminal of switching tube and LED high beams
Negative electrode is connected, and the control end of switching tube is used to receive the pwm control signal of outside input.
After adopting the above technical scheme, the utility model is at least up to one of following beneficial effect：
1st, to be the characteristic that can not be mutated using the electric current on inductance suppressed the automobile front of the utility model embodiment
The current spike of LED low-beam light, due to the situation without resistance consumption energy, therefore does not result in product when current spike is suppressed
The reduction of product operating efficiency and the variation of hot property；
2nd, the automobile front of the utility model embodiment reduces a switching tube and an electricity compared with prior art
The use of resistance, the I/O that need to only take controller is capable of achieving, and circuit structure and control are all simpler.
Brief description of the drawings
Fig. 1 shows the circuit theory schematic diagram of existing automobile front.
Fig. 2 shows the circuit theory schematic diagram of the automobile front according to the embodiment of the utility model one.
Specific embodiment
The utility model is made below in conjunction with the accompanying drawings being further illustrated.
Fig. 2 shows the circuit theory diagrams of the automobile front according to the embodiment of the utility model one.Refer to Fig. 2, root
According to the automobile front of the embodiment of the utility model one, including LED low-beam light LB and LED high beam HB, the inductance being one another in series
L1 and switching tube Q3.
The negative electrode of LED low-beam light LB is connected with the anode of LED high beams HB, the minus earth of LED high beams HB.Inductance L1
One end be connected to the common node of LED low-beam light LB and LED high beam HB, the other end of inductance L1 and the first of switching tube Q3
Conduction terminal is connected, and second conduction terminal of switching tube Q3 is connected with the negative electrode of LED high beams HB, and the control end of switching tube Q3 is used to connect
Receive the pwm control signal of outside input.Pwm control signal is exported by controller, for the conducting of controlling switch pipe Q3 and pass
Disconnected, controller is generally made up of single-chip microcomputer.When switching tube Q3 is turned on, only LED low-beam light LB is lighted, big before automobile so as to realize
The low-beam function of lamp；When switching tube Q3 is turned off, LED low-beam light LB and LED high beam HB is lighted, big before automobile so as to realize
The road function of lamp.
In the present embodiment, switching tube Q3 is NMOS tube.The grid of NMOS tube, drain electrode and source electrode respectively constitute switching tube Q3
Control end, the first conduction terminal and the second conduction terminal.
Automobile front according to the embodiment of the utility model one suppresses LED when low-beam function is switched to by road function
The principle of the current spike of dipped headlight is as follows.
When switching tube Q3 is turned on, loop is constituted between LED low-beam light LB, inductance L1, switching tube Q3 and ground GND, due to
Electric current on inductance L1 can not be mutated, so the electric current for flowing through LED low-beam light LB can slowly rise, so as to electric current point will not be produced
Peak.
The utility model can effectively suppress the electric current point of LED low-beam light when low-beam function is switched to by road function
Peak, and circuit structure and control all very simple, do not resulted in when current spike is suppressed yet product operating efficiency reduction and
The variation of hot property.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this practicality to the utility model
New spirit and scope.So, if it is of the present utility model these modification and modification belong to the utility model claim and
Within the scope of its equivalent technologies, then the utility model is also intended to comprising these changes and modification.
Claims (2)
1. a kind of automobile front, including the LED low-beam light that is one another in series and LED high beams, the negative electrode of the LED low-beam light with
The anode connection of the LED high beams, the minus earth of the LED high beams；Characterized in that, the automobile front is also wrapped
Include inductance and switching tube；One end of the inductance is connected to the common node of the LED low-beam light and LED high beams, the electricity
The other end of sense is connected with the first conduction terminal of the switching tube；Second conduction terminal of the switching tube and the LED high beams
Negative electrode connection, the control end of the switching tube is used to receive the pwm control signal of outside input.
2. automobile front as claimed in claim 1, it is characterised in that the switching tube is NMOS tube；The NMOS tube
Grid, drain electrode and source electrode respectively constitute the control end of the switching tube, the first conduction terminal and the second conduction terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621266912.4U CN206264885U (en) | 2016-11-24 | 2016-11-24 | Automobile front |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621266912.4U CN206264885U (en) | 2016-11-24 | 2016-11-24 | Automobile front |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206264885U true CN206264885U (en) | 2017-06-20 |
Family
ID=59040533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621266912.4U Active CN206264885U (en) | 2016-11-24 | 2016-11-24 | Automobile front |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206264885U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107135581A (en) * | 2017-07-02 | 2017-09-05 | 深圳市青蓝半导体有限公司 | A kind of distance-light lamp lighting control circuit based on linear constant current |
| US10568168B1 (en) | 2018-12-13 | 2020-02-18 | Chicony Power Technology Co., Ltd. | Lighting system |
| CN110939913A (en) * | 2018-09-21 | 2020-03-31 | 株式会社小糸制作所 | Vehicle lamp and control method thereof |
| WO2022133671A1 (en) * | 2020-12-21 | 2022-06-30 | Foshan Ichikoh Valeo Auto Lighting Systems Co., Ltd. | Light assembly for performing lighting functions with switching units in low side position |
-
2016
- 2016-11-24 CN CN201621266912.4U patent/CN206264885U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107135581A (en) * | 2017-07-02 | 2017-09-05 | 深圳市青蓝半导体有限公司 | A kind of distance-light lamp lighting control circuit based on linear constant current |
| CN110939913A (en) * | 2018-09-21 | 2020-03-31 | 株式会社小糸制作所 | Vehicle lamp and control method thereof |
| US10568168B1 (en) | 2018-12-13 | 2020-02-18 | Chicony Power Technology Co., Ltd. | Lighting system |
| WO2022133671A1 (en) * | 2020-12-21 | 2022-06-30 | Foshan Ichikoh Valeo Auto Lighting Systems Co., Ltd. | Light assembly for performing lighting functions with switching units in low side position |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech Park No. 2388 Patentee after: Koboda technology, Limited by Share Ltd Address before: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech Park No. 2388 Patentee before: Keboda Technology Corp. |