CN108575023B - Far and near light driving circuit of automobile headlamp - Google Patents
Far and near light driving circuit of automobile headlamp Download PDFInfo
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- CN108575023B CN108575023B CN201711069006.4A CN201711069006A CN108575023B CN 108575023 B CN108575023 B CN 108575023B CN 201711069006 A CN201711069006 A CN 201711069006A CN 108575023 B CN108575023 B CN 108575023B
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- 230000005669 field effect Effects 0.000 claims abstract description 54
- 238000011084 recovery Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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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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- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The invention provides a far and near light driving circuit of an automobile headlamp, which comprises resistors R1, R2, R3, R4, R5 and R6, diodes D1, D2, D3, D4 and D5, high beam light emitting tubes HD1-HDn, near light emitting tubes LD1-LDn, a DC-DC driving control module, field effect tubes Q1, Q2, Q3 and Q4 and a power supply VCC. The invention uses the same DC-DC drive control module for the high beam and the low beam, and realizes the high beam and the low beam drive sharing by switching the dummy load resistor module and the high beam, thereby greatly reducing the cost of components, improving the use efficiency and enabling the LED light source to be more and more widely used in the high beam and the low beam functions.
Description
Technical Field
The invention relates to the technical field of automobile lamp illumination, in particular to an automobile headlamp high-low beam driving circuit.
Background
With the progress of the age, the development of technology and the general application of LEDs, more and more car lights adopt LEDs as light sources, and particularly, the application of LEDs in the aspect of tail lights is very wide. In the application of the high beam and low beam functions of the headlight, the traditional linear circuit design has extremely low use efficiency due to relatively large power, and the circuit design basically adopts a DC-DC driving mode for improving the efficiency. However, because the driving of the high beam and the low beam functions is a separate control module, the cost of components is too high, which brings great obstruction to the use of the LED light source in the high beam and the low beam functions.
The patent 201620663015.0 discloses an automatic far and near light conversion circuit of an automobile, which comprises a power supply, a light sensing element, a sensor circuit, a comparator circuit and a delay light conversion control circuit, wherein the light sensing element is connected with the input end of the sensor circuit, the output end of the sensor circuit is connected with the input end of the comparator circuit, the output end of the comparator circuit is connected with the delay light conversion control circuit, the delay light conversion control circuit is connected with a far and near headlight of the automobile, and the light sensing element, the sensor circuit, the comparator circuit, the delay light conversion control circuit and the far and near headlight of the automobile are powered by the power supply. Patent 200910153877.3 discloses a far and near light control circuit of a headlight of an automobile, which comprises a singlechip EM78P153, a three-terminal voltage stabilizing circuit and a full-bridge power driving circuit, wherein one end of a near light limit contact switch S1, one end of a far light limit contact switch S2 and two contacts of a far and near light change-over switch S3 are respectively connected with the singlechip. The three-terminal voltage stabilizing circuit comprises a three-terminal voltage stabilizer and two filter capacitors; the full-bridge power driving circuit comprises two PNP triodes, two NPN triodes, eight resistors and a filter capacitor. The patent directly irradiates the far-reaching headlamp light to the light sensing element positioned at the front end of the automobile, so that the light sensing element converts light energy into electric energy to drive the automobile far-reaching headlamp control mechanism, and the aim of automatic far-reaching headlamp conversion is fulfilled; the direct current motor is utilized to instantly obtain the power when the high beam and the low beam of the automobile headlight are converted, so that the purpose of rapid expansion and contraction and the purpose of respectively lighting the high beam and the low beam are achieved. However, no related technical scheme is presented for a driving circuit shared by high beam and low beam of the automobile headlamp.
Disclosure of Invention
(one) solving the technical problems
The invention aims to overcome the defect that the high beam and the low beam of the automobile headlamp in the prior art adopt independent driving modules, and provides the high beam and low beam driving circuit of the automobile headlamp, wherein the high beam and the low beam share the same DC-DC driving control module, so that the cost of components is greatly reduced, the use efficiency is improved, and the LED light source is more and more widely used in the high beam and low beam functions.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the driving circuit comprises resistors R1, R2, R3, R4, R5 and R6, diodes D1, D2, D3, D4 and D5, high-beam light emitting tubes HD1-HDn, low-beam light emitting tubes LD1-LDn, a DC-DC driving control module, field effect transistors Q1, Q2, Q3 and Q4 and a power supply VCC; the power supply VCC is respectively connected with cathodes of the diodes D1 and D2 and one input end of the DC-DC drive control module, and the other input end of the DC-DC drive control module is grounded; one output end of the DC-DC drive control module is grounded, the other output end of the DC-DC drive control module is connected with the anode of the luminous tube LD1, the low beam luminous tubes LD1-LDn are connected in series, the cathode of the low beam luminous tube LDn is respectively connected with one end of a resistor R4 and the anode of the high beam luminous tube HD1, the other end of the resistor R4 is connected with the drain electrode of the field effect tube Q2, the high beam luminous tubes HD1-HDn are connected in series, the cathode of the high beam luminous tube HDn is connected with the drain electrode of the field effect tube Q3, the source electrode of the field effect tube Q3 is grounded, the grid electrode of the field effect tube Q3 is connected with the drain electrode of the field effect tube Q4 and one end of the resistor R5, and the other end of the resistor R5 is connected with a power VCC; the source electrode of the field effect tube Q4 is grounded, the grid electrode of the field effect tube Q4 is grounded through a resistor R3, the grid electrode of the field effect tube Q4 is connected with the cathode of a diode D5, the anode of the diode D5 is respectively connected with the drain electrode of the field effect tube Q1, the anode of the diode D4 and one end of a resistor R1, the other end of the resistor R1 is connected with a power supply VCC, the cathode of the diode D4 is connected with the grid electrode of the field effect tube Q2 and one end of a resistor R2, the other end of the resistor R2 is grounded, and the source electrode of the field effect tube Q2 is grounded; the grid electrode of the field effect tube Q1 is connected with the cathode of the diode D3, and the anode of the diode D3 is respectively connected with the anodes of the diodes D1 and D2.
Further, the DC-DC drive control module is a BOOST switching power supply module.
Further, the input voltage of the BOOST switching power supply module is 9-16V.
Further, the field effect transistors Q1, Q2, Q3 and Q4 are N-channel MOS transistors.
Further, the diodes D1, D2, D3, D4, D5 are fast recovery diodes.
Further, the fast recovery diodes D1, D2, D3, D4, D5 are S2M.
Further, the resistor R4 forms a dummy load resistor module, and the power of the dummy load resistor module is equal to that of the high beam luminous tubes HD 1-HDn.
(III) beneficial effects
The invention has the beneficial effects that: the utility model provides a car head-light far and near light drive circuit, far and near light share the same DC-DC drive control module, through the switching of dummy load resistance module and far-reaching headlamp to realize far and near light drive sharing, greatly reduced components and parts cost improves availability factor, makes the LED light source more and more extensively in far and near light function's use.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a driving circuit according to the present invention.
Description of related reference numerals: resistors R1, R2, R3, R4, R5 and R6, diodes D1, D2, D3, D4 and D5, high beam luminous tubes HD1-HDn, low beam luminous tubes LD1-LDn, a DC-DC drive control module, field effect tubes Q1, Q2, Q3 and Q4, a power supply VCC and a ground GND.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a driving circuit for high and low beam of automotive headlamp comprises resistors R1, R2, R3, R4, R5, R6, diodes D1, D2, D3, D4, D5, high beam light emitting tubes HD1-HDn, low beam light emitting tubes LD1-LDn, a DC-DC driving control module, field effect transistors Q1, Q2, Q3, Q4, a power supply VCC, and a ground GND. Resistor R4 constitutes a dummy load resistor module. The high beam luminous tubes HD1-HDn are serially connected with LD1-LDn to form a high beam LED module. The low-beam luminous tubes LD1-LDn are serially connected with LD1-LDn to form a low-beam LED module. The DC-DC driving control module is a DC-DC BOOST which is a switching power supply module.
The power supply VCC is respectively connected with cathodes of the diodes D1 and D2 and one input end of the DC-DC drive control module, and the other input end of the DC-DC drive control module is grounded; one output end of the DC-DC drive control module is grounded, the other output end of the DC-DC drive control module is connected with the anode of the luminous tube LD1, the low beam luminous tubes LD1-LDn are connected in series, the cathode of the low beam luminous tube LDn is respectively connected with one end of a resistor R4 and the anode of the high beam luminous tube HD1, the other end of the resistor R4 is connected with the drain electrode of the field effect tube Q2, the high beam luminous tubes HD1-HDn are connected in series, the cathode of the high beam luminous tube HDn is connected with the drain electrode of the field effect tube Q3, the source electrode of the field effect tube Q3 is grounded, the grid electrode of the field effect tube Q3 is connected with the drain electrode of the field effect tube Q4 and one end of the resistor R5, and the other end of the resistor R5 is connected with a power VCC; the source electrode of the field effect tube Q4 is grounded, the grid electrode of the field effect tube Q4 is grounded through a resistor R3, the grid electrode of the field effect tube Q4 is connected with the cathode of a diode D5, the anode of the diode D5 is respectively connected with the drain electrode of the field effect tube Q1, the anode of the diode D4 and one end of a resistor R1, the other end of the resistor R1 is connected with a power supply VCC, the cathode of the diode D4 is connected with the grid electrode of the field effect tube Q2 and one end of a resistor R2, the other end of the resistor R2 is grounded, and the source electrode of the field effect tube Q2 is grounded; the grid electrode of the field effect tube Q1 is connected with the cathode of the diode D3, and the anode of the diode D3 is respectively connected with the anodes of the diodes D1 and D2.
The DC-DC drive control module is a BOOST switching power supply module, and the input voltage of the BOOST switching power supply module is 9-16V. The field effect transistors Q1, Q2, Q3 and Q4 are N-channel MOS transistors. Because the price of the MOS tube with the P channel is relatively high, the MOSFET adopts an N channel MOS tube. The N-channel MOS tube belongs to a voltage control type device, is convenient to control, can not generate a secondary breakdown phenomenon, has relatively good thermal stability and has very strong anti-interference capability. Diodes D1, D2, D3, D4, D5 are fast recovery diodes, and fast recovery diodes D1, D2, D3, D4, D5 are S2M. The resistor R4 forms a dummy load resistor module, and the power of the dummy load resistor module is equal to that of the high beam luminous tubes HD 1-HDn.
In specific work, the DC-DC drive control module is a BOOST switch power module, LD1-LDn are Light Emitting Diodes (LEDs) of low beam light emitting diodes in series, HD1-HDn are high beam luminous tube LEDs connected in series, a resistor R4 is a dummy load resistor module, Q1-Q4 are NMOS tubes, and D1-D5 are anti-reverse diodes. When the Low Beam is supplied with power, the Low Beam is at a high level, the switching power supply inputs 9-16V voltage, the output constant voltage Vout supplies power for the Low Beam luminous tubes LD1-LDn, meanwhile, due to the effect of the reverse connection preventing diode D2, the grid electrode of the field effect tube Q1 is at a Low level, the field effect tube Q1 is not conducted, the field effect tubes Q2 and Q4 are both conducted due to the effect of the pull-up power supply VCC, so that the dummy load resistance module R4 works, the field effect tube Q3 is not conducted, the high Beam luminous tubes HD1-HDn do not work, and only the Low Beam lamp is started at the moment. When the High Beam is supplied with power, the High Beam is at a High level, the same switching power supply inputs 9-16V voltage, constant voltage Vout is output to supply power to High Beam luminotrons HD1-HDn, the grid electrode of the field effect transistor Q1 is at a High level, the field effect transistor Q1 is conducted, so that the grids of the field effect transistors Q2 and Q4 are at a low level, the field effect transistors Q2 and Q4 are not conducted, the dummy load resistor module R4 does not work, the grid electrode of the field effect transistor Q3 is at a High level due to the action of a pull-up power supply VCC, the field effect transistor Q3 is conducted, the High Beam luminotrons HD1-HDn work, and the High Beam and low Beam lamps are all turned on at the moment. The circuit realizes the common use of the far-near light drive through the switching of the dummy load resistor module and the far-light lamp.
In summary, in the embodiment of the invention, the far and near light driving circuit of the automotive headlamp shares the same DC-DC driving control module with the far and near light, and the switching between the dummy load resistor module and the far and near light is performed, so that the far and near light driving sharing is realized, the cost of components is greatly reduced, the use efficiency is improved, and the LED light source is more and more widely used in the far and near light function.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. A driving circuit for far and near light of an automobile headlamp is characterized in that: the LED lamp comprises resistors R1, R2, R3, R4, R5 and R6, diodes D1, D2, D3, D4 and D5, high beam luminous tubes HD1-HDn, low beam luminous tubes LD1-LDn, a DC-DC driving control module, field effect tubes Q1, Q2, Q3 and Q4 and a power supply VCC; the power supply VCC is respectively connected with cathodes of the diodes D1 and D2 and one input end of the DC-DC drive control module, and the other input end of the DC-DC drive control module is grounded; one output end of the DC-DC drive control module is grounded, the other output end of the DC-DC drive control module is connected with the anode of the luminous tube LD1, the low beam luminous tubes LD1-LDn are connected in series, the cathode of the low beam luminous tube LDn is respectively connected with one end of a resistor R4 and the anode of the high beam luminous tube HD1, the other end of the resistor R4 is connected with the drain electrode of the field effect tube Q2, the high beam luminous tubes HD1-HDn are connected in series, the cathode of the high beam luminous tube HDn is connected with the drain electrode of the field effect tube Q3, the source electrode of the field effect tube Q3 is grounded, the grid electrode of the field effect tube Q3 is connected with the drain electrode of the field effect tube Q4 and one end of the resistor R5, and the other end of the resistor R5 is connected with a power VCC; the source electrode of the field effect tube Q4 is grounded, the grid electrode of the field effect tube Q4 is grounded through a resistor R3, the grid electrode of the field effect tube Q4 is connected with the cathode of a diode D5, the anode of the diode D5 is respectively connected with the drain electrode of the field effect tube Q1, the anode of the diode D4 and one end of a resistor R1, the other end of the resistor R1 is connected with a power supply VCC, the cathode of the diode D4 is connected with the grid electrode of the field effect tube Q2 and one end of a resistor R2, the other end of the resistor R2 is grounded, and the source electrode of the field effect tube Q2 is grounded; the grid electrode of the field effect tube Q1 is connected with the cathode of the diode D3, and the anode of the diode D3 is respectively connected with the anodes of the diodes D1 and D2; the DC-DC drive control module is a BOOST switch power module; the resistor R4 forms a dummy load resistor module, and the power of the dummy load resistor module is equal to that of the high beam luminous tubes HD 1-HDn.
2. The high and low beam driving circuit of an automotive headlamp according to claim 1, wherein the BOOST switching power supply module has an input voltage of 9-16V.
3. The driving circuit for high and low beam of automotive headlamp according to claim 1, wherein the field effect transistors Q1, Q2, Q3, Q4 are N-channel MOS transistors.
4. The high and low beam driving circuit of an automotive headlamp according to claim 1, wherein the diodes D1, D2, D3, D4, D5 are fast recovery diodes.
5. The high and low beam driving circuit of claim 4, wherein the fast recovery diodes D1, D2, D3, D4, D5 are S2M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711069006.4A CN108575023B (en) | 2017-11-03 | 2017-11-03 | Far and near light driving circuit of automobile headlamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711069006.4A CN108575023B (en) | 2017-11-03 | 2017-11-03 | Far and near light driving circuit of automobile headlamp |
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| Publication Number | Publication Date |
|---|---|
| CN108575023A CN108575023A (en) | 2018-09-25 |
| CN108575023B true CN108575023B (en) | 2023-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704352A (en) * | 2009-11-16 | 2010-05-12 | 杭州电子科技大学 | Near light and far light control circuit of automotive headlamp |
| CN202818699U (en) * | 2012-08-16 | 2013-03-20 | 重庆雷本光电科技有限公司 | LED automotive headlamp drive circuit |
| JP2015125800A (en) * | 2013-12-25 | 2015-07-06 | 株式会社小糸製作所 | Vehicle lamp |
| CN206332881U (en) * | 2016-12-13 | 2017-07-14 | 武汉通畅汽车电子照明有限公司 | Built-in type distance-light control module |
| CN207573669U (en) * | 2017-11-03 | 2018-07-03 | 常州星宇车灯股份有限公司 | A kind of car headlamp distance light drive circuit |
-
2017
- 2017-11-03 CN CN201711069006.4A patent/CN108575023B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704352A (en) * | 2009-11-16 | 2010-05-12 | 杭州电子科技大学 | Near light and far light control circuit of automotive headlamp |
| CN202818699U (en) * | 2012-08-16 | 2013-03-20 | 重庆雷本光电科技有限公司 | LED automotive headlamp drive circuit |
| JP2015125800A (en) * | 2013-12-25 | 2015-07-06 | 株式会社小糸製作所 | Vehicle lamp |
| CN206332881U (en) * | 2016-12-13 | 2017-07-14 | 武汉通畅汽车电子照明有限公司 | Built-in type distance-light control module |
| CN207573669U (en) * | 2017-11-03 | 2018-07-03 | 常州星宇车灯股份有限公司 | A kind of car headlamp distance light drive circuit |
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| Publication number | Publication date |
|---|---|
| CN108575023A (en) | 2018-09-25 |
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