CN114801976B - High-beam and low-beam lamp control circuit - Google Patents
High-beam and low-beam lamp control circuit Download PDFInfo
- Publication number
- CN114801976B CN114801976B CN202210516880.2A CN202210516880A CN114801976B CN 114801976 B CN114801976 B CN 114801976B CN 202210516880 A CN202210516880 A CN 202210516880A CN 114801976 B CN114801976 B CN 114801976B
- Authority
- CN
- China
- Prior art keywords
- triode
- power supply
- resistor
- capacitor
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003990 capacitor Substances 0.000 claims description 105
- 230000000087 stabilizing effect Effects 0.000 claims description 14
- 238000001914 filtration Methods 0.000 description 12
- 230000001276 controlling effect Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
- B60Q1/1407—General lighting circuits comprising dimming circuits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
- B60Q1/1415—Dimming circuits
- B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
-
- 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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides a far-near light control circuit which comprises a reflector regulator, an LED lamp module, an LED starting module, a brightness control module and a first brightness regulation module, wherein when a signal of a far-light power supply is received, a fourth triode and a fifth triode are conducted, a second triode is conducted, the LED lamp module is in a high brightness state, and a reflector is in a first angle; when a dipped headlight power supply signal is received, the first MOS tube is conducted with the second triode, the fourth triode and the fifth triode are cut off, the LED lamp module is in medium brightness, and the reflecting plate is in a second angle; when the high beam power supply and the low beam power supply signals are received at the same time, the first MOS tube is conducted, the fourth triode and the fifth triode are cut off, and the LED lamp module is in medium brightness. Therefore, compared with the prior art, the switching of the high beam and low beam lamps can be realized through a hardware circuit, a software control system is not needed, and the software dependence is reduced.
Description
Technical Field
The invention relates to the field of car lamp control, in particular to a far-near light control circuit.
Background
At present, with the increasingly obvious advantages of the LED lamp, the automobile headlight generally adopts the LED lamp, but the cost of adopting the LED headlight is higher, and the corresponding control system is more complex than the halogen lamp depending on the control chip of the automobile headlight. The prior art generally relies on software to realize the switching of the high beam and the low beam, and the switching is manual, so that the cost of the method is high. Therefore, a control method or product with low software dependency is needed to solve the problem of how to realize automatic switching of high beam and low beam.
Disclosure of Invention
The invention provides a far-near light control circuit, which realizes automatic switching of far-near light and reduces dependence on software.
In order to solve the technical problems, the embodiment of the invention provides a far and near light control circuit which comprises a reflector regulator, an LED lamp module, an LED starting module, a brightness control module and a first brightness adjustment module; wherein,,
the first input end of the reflector regulator is connected with a high beam power supply, the second input end of the reflector regulator is connected with a low beam power supply, the third input end of the reflector regulator is connected with a battery power supply, and the grounding end of the reflector regulator is grounded;
when the reflector regulator receives a high beam power supply signal, controlling the angle of the reflector to be a first angle; when a dipped headlight power supply signal is received, controlling the angle of the reflecting plate to be a second angle; when the low beam power supply signal and the high beam power supply signal are received at the same time, controlling the angle of the reflecting plate to be the second angle;
the LED starting module comprises a second triode, the base electrode of the second triode is connected with the high beam power supply and the low beam power supply, the collector electrode of the second triode is connected with the output end of the LED lamp module, and the emitter electrode of the second triode is grounded;
the brightness control module comprises a first MOS tube, the drain electrode of the first MOS tube is connected with the high beam power supply, the grid electrode of the first MOS tube is connected with the low beam power supply, and the source electrode of the first MOS tube is grounded;
the first brightness adjusting module comprises a fourth triode, the collector electrode of the fourth triode is connected with the collector electrode of the second triode and the output end of the LED lamp module, the emitter electrode of the fourth triode is grounded, and the base electrode of the fourth triode is connected with the drain electrode of the first MOS tube;
the input end of the LED lamp module is connected with the high beam power supply, and the input end of the LED lamp module is connected with the low beam power supply.
As a preferable scheme, the first brightness adjusting module further comprises an eleventh resistor, and the far-near light control circuit further comprises an eighth capacitor;
the emitter of the fourth triode is grounded specifically as follows: the emitter of the fourth triode is grounded through the eleventh resistor;
the base electrode of the fourth triode is also connected with the ground through the eighth capacitor.
As a preferable scheme, the far-near light control circuit further comprises a first short-circuit protection module, wherein the first short-circuit protection module comprises a first triode, a fourth resistor, a sixth resistor, a seventh resistor and a seventh capacitor; wherein,,
the collector electrode of the first triode is connected with the base electrode of the second triode, the base electrode of the first triode is connected with the first end of the fourth resistor, and the emitter electrode of the first triode is grounded;
the second end of the fourth resistor is connected with the emitter of the second triode, the first end of the sixth resistor, the first end of the seventh resistor and the first end of the seventh capacitor;
the second end of the sixth resistor, the second end of the seventh resistor and the second end of the seventh capacitor are grounded.
As a preferable scheme, the far-near light control circuit further comprises a second short-circuit protection module, wherein the second short-circuit protection module comprises a third triode, a tenth resistor, a twelfth resistor, a thirteenth resistor and a ninth capacitor; wherein,,
the collector electrode of the third triode is connected with the high beam power supply, the base electrode of the third triode is connected with the first end of the tenth resistor, and the emitter electrode of the third triode is grounded;
the second end of the tenth resistor is connected with the emitter of the fourth triode, the first end of the twelfth resistor, the first end of the thirteenth resistor and the first end of the ninth capacitor;
a second terminal of the twelfth resistor, a second terminal of the thirteenth resistor, and a second terminal of the ninth capacitor are grounded.
As a preferable scheme, the far-near light control circuit further comprises a first power supply voltage stabilizing and filtering module, wherein the first power supply voltage stabilizing and filtering module comprises a first TVS tube, a second diode, a first capacitor and a second capacitor; wherein,,
the first end of the first TVS tube is connected with the high beam power supply, the anode of the second diode and the first end of the first capacitor, and the second end of the first TVS tube is grounded;
the second end of the first capacitor is connected with the first end of the second capacitor, and the second end of the second capacitor is grounded;
the input end of the LED lamp module is connected with the high beam power supply specifically as follows: the high beam power supply is connected with the input end of the LED lamp module through the second diode, wherein the high beam power supply is connected with the anode of the second diode, and the cathode of the second diode is connected with the input end of the LED lamp module.
As a preferable scheme, the far-near light control circuit further comprises a second power supply voltage stabilizing and filtering module, wherein the second power supply voltage stabilizing and filtering module comprises a second TVS tube, a third diode, a third capacitor and a fourth capacitor; wherein,,
the first end of the second TVS tube is connected with the dipped headlight power supply, the anode of the third triode and the first end of the third capacitor, and the second end of the second TVS tube is grounded;
the second end of the third capacitor is connected with the first end of the fourth capacitor, and the second end of the fourth capacitor is grounded;
the input end of the LED lamp module is connected with the dipped headlight power supply specifically: the low beam light power supply is connected with the input end of the LED lamp module through the third diode, wherein the low beam light power supply is connected with the anode of the third diode, and the cathode of the third diode is connected with the input end of the LED lamp module.
As an optimal scheme, the far-near light control circuit further comprises a third power supply voltage stabilizing and filtering module, wherein the third power supply voltage stabilizing and filtering module comprises a third TVS tube and a twelfth capacitor; wherein,,
the storage battery power supply is connected with the first end of the third TVS tube, the third input end of the reflector regulator and the first end of the twelfth capacitor, the second end of the third TVS tube is grounded, and the second end of the twelfth capacitor is grounded.
As a preferable scheme, the brightness control module further comprises a fourth diode, a sixth capacitor, an eighth resistor and a fifth resistor; wherein,,
the grid electrode of the first MOS tube is connected with the dipped headlight power supply specifically: the dipped headlight power supply is connected with the first end of the fifth resistor, and the second end of the fifth resistor is connected with the grid electrode of the first MOS tube;
the second end of the fifth resistor is also connected with the cathode of the fourth diode, the first end of the sixth capacitor and the first end of the eighth resistor;
an anode of the fourth diode, a second end of the sixth capacitor, and a second end of the eighth resistor are grounded; the fourth diode is a voltage stabilizing tube.
Preferably, the far-near light control circuit further comprises a fifth capacitor and an eleventh capacitor, wherein,
the input end of the LED lamp module is connected with the first end of the eleventh capacitor, and the output end of the LED lamp module is connected with the second end of the eleventh capacitor;
the base electrode of the second triode is connected with the first end of the fifth capacitor, and the emitter electrode of the second triode and the second end of the fifth capacitor are grounded.
As a preferable scheme, the far-near light control circuit further comprises a first diode, a first resistor, a second resistor, a third resistor and a ninth resistor; wherein,,
the first input end of the reflector regulator is connected with a high beam power supply specifically: the first input end of the reflector regulator is connected with a high beam power supply through a first resistor;
the second input end of the reflector regulator is connected with a dipped headlight power supply specifically: the second input end of the reflector regulator is connected with a dipped headlight power supply through a second resistor;
the positive pole of first diode with the far-reaching headlamp power is connected, the negative pole of first diode with the first end of ninth resistance is connected, the second end of ninth resistance with the base of fourth triode is connected, the first end of third resistance with the dipped headlight power with the far-reaching headlamp power is connected, the second end of third resistance with the base of second triode is connected.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a far and near light control circuit which comprises a reflector regulator, an LED lamp module, an LED starting module, a brightness control module and a first brightness regulation module, wherein when a signal of a far light power supply is received, a fourth triode and a fifth triode are conducted, a second triode is conducted, the LED lamp module is in a high brightness state, and a reflector is in a first angle; when a dipped headlight power supply signal is received, the first MOS tube is conducted with the second triode, the fourth triode and the fifth triode are cut off, the LED lamp module is in medium brightness, and the reflecting plate is in a second angle; when the high beam power supply and the low beam power supply signals are received at the same time, the first MOS tube is conducted, the fourth triode and the fifth triode are cut off, and the LED lamp module is in medium brightness. Therefore, compared with the prior art, the switching of the high beam and low beam lamps can be realized through a hardware circuit, a software control system is not needed, and the software dependence is reduced.
Drawings
Fig. 1: the invention provides a schematic structure diagram of an embodiment of a far-near light control circuit.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
Embodiment one:
referring to fig. 1, fig. 1 is a far-near light control circuit provided by the embodiment of the invention, which comprises a first power supply voltage stabilizing and filtering module 1, a second power supply voltage stabilizing and filtering module 2, a third power supply voltage stabilizing and filtering module 3, a first short-circuit protection module 4, a second short-circuit protection module 5, an LED on module 6, a brightness control module 7, a reflector regulator 8, an LED lamp module 9, a first brightness regulating module 10 and a second brightness regulating module 11, wherein,
the first input end of the reflector regulator 8 is connected with a high beam power supply V1, the second input end of the reflector regulator 8 is connected with a dipped headlight power supply V2, the third input end of the reflector regulator 8 is connected with a battery power supply V3, and the grounding end of the reflector regulator 8 is grounded;
the reflector regulator 8 is powered by a battery power supply V3, a high beam power supply V1 provides a high beam signal, and a low beam power supply V2 provides a low beam signal. When the reflector regulator 8 receives a high beam power supply V1 signal, controlling the angle of the reflector to be a first angle; when a dipped headlight power supply V2 signal is received, controlling the angle of the reflecting plate to be a second angle; when the low beam power supply signal and the high beam power supply signal are received at the same time, judging that the high beam and low beam system is abnormal at the moment, and controlling the angle of the reflector to be the second angle;
the LED starting module 6 comprises a second triode Q2, wherein the base electrode of the second triode Q2 is connected with the high beam power supply V1 and the low beam power supply V2, the collector electrode of the second triode Q2 is connected with the output end of the LED lamp module 9, and the emitter electrode of the second triode Q2 is grounded;
the brightness control module 7 comprises a first MOS tube M1, wherein the drain electrode of the first MOS tube M1 is connected with the high beam power supply V1, the grid electrode of the first MOS tube M1 is connected with the low beam power supply V2, and the source electrode of the first MOS tube M1 is grounded;
the first brightness adjusting module 10 includes a fourth triode Q4, a collector of the fourth triode Q4 is connected with a collector of the second triode Q2 and an output end of the LED lamp module 9, an emitter of the fourth triode Q4 is grounded, and a base of the fourth triode Q4 is connected with a drain of the first MOS transistor M1;
the input end of the LED lamp module 9 is connected with the high beam power supply V1 and the low beam power supply V2.
Further, the first brightness adjusting module 10 further includes an eleventh resistor R11, and the far-near light control circuit further includes an eighth capacitor C8;
the emitter of the fourth triode Q4 is grounded specifically: the emitter of the fourth triode Q4 is grounded through the eleventh resistor R11;
the base electrode of the fourth triode Q4 is also connected with the ground through the eighth capacitor C8.
As an example of the present embodiment, the far-near light control circuit further includes a second brightness adjustment module 11, where the second brightness adjustment module 11 includes a fifth triode Q5, a fourth capacitor C4, a tenth capacitor C10, and a fourteenth resistor R14; the collector of the fifth triode Q5 is connected with the collector of the fourth triode Q4, the base of the fifth triode Q5 is grounded through the tenth capacitor C10 and is simultaneously connected with the base of the fourth triode Q4, and the emitter of the fifth triode Q5 is connected with the second end of the eleventh resistor R11 through the fourteenth resistor R14. By implementing the embodiment, the LED lamp module 9 can obtain a larger brightness adjustment range by setting more brightness adjustment modules, and meanwhile, the brightness of the high beam can be better set.
Further, the first short-circuit protection module 4 includes a first triode Q1, a fourth resistor R4, a sixth resistor R6, a seventh resistor R7, and a seventh capacitor C7;
the collector of the first triode Q1 is connected with the base of the second triode Q2, the base of the first triode Q1 is connected with the first end of the fourth resistor R4, and the emitter of the first triode Q1 is grounded;
the second end of the fourth resistor R4 is connected to the emitter of the second triode Q2, the first end of the sixth resistor R6, the first end of the seventh resistor R7 and the first end of the seventh capacitor C7;
the second end of the sixth resistor R6, the second end of the seventh resistor R7 and the second end of the seventh capacitor C7 are grounded.
In this embodiment, the far-near light control circuit further includes a second short-circuit protection module 5, where the second short-circuit protection module 5 includes a third triode Q3, a tenth resistor R10, a twelfth resistor R12, a thirteenth resistor R13, and a ninth capacitor C9; wherein,,
the collector electrode of the third triode Q3 is connected with the high beam power supply V1, the base electrode of the third triode Q3 is connected with the first end of the tenth resistor R10, and the emitter electrode of the third triode Q3 is grounded;
the second end of the tenth resistor R10 is connected to the emitter of the fourth triode Q4, the first end of the twelfth resistor R12, the first end of the thirteenth resistor R13, and the first end of the ninth capacitor C9;
a second end of the twelfth resistor R12, a second end of the thirteenth resistor R13, and a second end of the ninth capacitor C9 are grounded.
The first power supply voltage stabilizing and filtering module 1 comprises a first TVS tube T1, a second diode D2, a first capacitor C1 and a second capacitor C2; wherein the second diode D2 is used for preventing reverse connection.
The first end of the first TVS tube T1 is connected with the high beam power supply V1, the anode of the second diode D2 and the first end of the first capacitor C1, and the second end of the first TVS tube T1 is grounded;
the second end of the first capacitor C1 is connected with the first end of the second capacitor C2, and the second end of the second capacitor C2 is grounded;
the input end of the LED lamp module 9 is connected with the high beam power supply V1 specifically as follows: the high beam power supply V1 is connected with the input end of the LED lamp module 9 through the second diode D2, wherein the high beam power supply V1 is connected with the anode of the second diode D2, and the cathode of the second diode D2 is connected with the input end of the LED lamp module 9.
The second power supply voltage stabilizing and filtering module 2 comprises a second TVS tube T2, a third diode D3, a third capacitor C3 and a fourth capacitor C4; wherein the third diode D3 is used for preventing reverse connection.
The first end of the second TVS tube T2 is connected with the dipped headlight power supply V2, the anode of the third triode Q3 and the first end of the third capacitor C3, and the second end of the second TVS tube T2 is grounded;
the second end of the third capacitor C3 is connected with the first end of the fourth capacitor C4, and the second end of the fourth capacitor C4 is grounded;
the input end of the LED lamp module 9 is connected with the dipped headlight power supply V2 specifically as follows: the dipped headlight power supply V2 is connected with the input end of the LED lamp module 9 through the third diode D3, wherein the dipped headlight power supply V2 is connected with the anode of the third diode D3, and the cathode of the third diode D3 is connected with the input end of the LED lamp module 9.
The third power supply voltage stabilizing and filtering module 3 comprises a third TVS tube T3 and a twelfth capacitor C12; wherein,,
the battery power supply V3 is connected with the first end of the third TVS tube T3, the third input end of the reflector regulator 8, and the first end of the twelfth capacitor C12, and the second end of the third TVS tube T3 and the second end of the twelfth capacitor C12 are grounded.
Preferably, the brightness control module 7 further includes a fourth diode D4, a sixth capacitor C6, an eighth resistor R8, and a fifth resistor R5; the fourth diode D4 is a voltage regulator.
The grid electrode of the first MOS tube M1 is connected with the dipped headlight power supply V2 specifically as follows: the dipped headlight power supply V2 is connected with the first end of the fifth resistor R5, and the second end of the fifth resistor R5 is connected with the grid electrode of the first MOS tube M1;
the second end of the fifth resistor R5 is further connected to the cathode of the fourth diode D4, the first end of the sixth capacitor C6, and the first end of the eighth resistor R8;
the anode of the fourth diode D4, the second end of the sixth capacitor C6, and the second end of the eighth resistor R8 are all grounded.
As a preferable scheme, the far-near light control circuit further comprises a fifth capacitor C5, an eleventh capacitor C11, a first diode D1, a first resistor R1, a second resistor R2, a third resistor R3 and a ninth resistor R9, wherein,
the input end of the LED lamp module 9 is connected with the first end of the eleventh capacitor C11, and the output end of the LED lamp module 9 is connected with the second end of the eleventh capacitor C11;
the base of the second triode Q2 is connected with the first end of the fifth capacitor C5, the emitter of the second triode Q2 is grounded, and the second end of the fifth capacitor C5 is grounded.
The emitter of the second triode Q2 is grounded specifically: the LED on module further includes a fifteenth resistor R15, and the emitter of the second triode Q2 is grounded through the fifteenth resistor R15.
The first input end of the reflector regulator 8 is connected with the high beam power supply V1 specifically: the first input end of the reflector regulator 8 is connected with a high beam power supply V1 through a first resistor R1;
the second input end of the reflector regulator 8 is connected with the dipped headlight power supply V2 specifically as follows: the second input end of the reflector regulator 8 is connected with a dipped headlight power supply V2 through a second resistor R2;
the positive pole of first diode D1 with far-reaching headlamp power V1 is connected, the negative pole of first diode D1 with ninth resistance R9's first end is connected, ninth resistance R9's second end with fourth triode Q4's base is connected, third resistance R3's first end with near-reaching headlamp power V2 is connected through third diode D3 and connects the negative pole of third diode D3, third resistance R3's first end still with the far-reaching headlamp power is connected through second diode D2 and connects the negative pole of second diode D2, third resistance R3's second end with the base of second triode is connected.
The LED lamp module 9 is preferably composed of eight LED lamps, which are a first LED lamp (LED 1), a second LED lamp (LED 2), a third LED lamp (LED 3), a fourth LED lamp (LED 4), a fifth LED lamp (LED 5), a sixth LED lamp (LED 6), a seventh LED lamp (LED 7) and an eighth LED lamp (LED 8), respectively.
The anode of the first LED lamp (LED 1) and the anode of the second LED lamp (LED 2) are the input end of the LED lamp module 9, the anode of the first LED lamp (LED 1) and the anode of the second LED lamp (LED 2) are connected with the first end of the eleventh capacitor C11, the cathode of the first LED lamp (LED 1) is connected with the cathode of the second LED lamp (LED 2), the anode of the third LED lamp (LED 3) and the anode of the fourth LED lamp (LED 4), the cathode of the third LED lamp (LED 3) is connected with the cathode of the fourth LED lamp (LED 4), the anode of the fifth LED lamp (LED 5) and the anode of the sixth LED lamp (LED 6), the cathode of the seventh LED lamp (LED 7) is connected with the anode of the eighth LED lamp (LED 8), and the cathode of the seventh LED lamp (LED 7) is connected with the anode of the eighth capacitor C11.
When the far-beam and near-beam lamp control circuit receives the far-beam lamp signal, the far-beam lamp power supply V1 clamps through the first TVS tube T1, and filters through the first capacitor C1 and the second capacitor C2 to pull up the base end potentials of the fourth triode Q4 and the fifth triode Q5, and at the moment, the fourth triode Q4 and the fifth triode Q5 are in a conducting state, the light emitting diodes in the LED lamp module 9 are in a high-brightness state, the reflecting plate is in a first angle, and the base potentials of the first triode Q1 and the third triode Q3 are relatively low, so that the LED lamp module is in a cut-off state. When the light emitting diode in the LED lamp module 9 breaks down, the base potentials of the first triode Q1 and the third triode Q3 rise, and are converted from the off state to the on state, at this time, the base potentials of the second triode Q2, the fourth triode Q4 and the fifth triode Q5 are pulled down, and are converted from the on state to the off state, and meanwhile, the light emitting diode of the LED lamp module 9 is in the off state, so that the self-locking protection function is started.
When the low beam light control circuit receives the low beam light signal, the low beam light power supply V2 clamps the second TVS T2, and filters the third capacitor C3 and the fourth capacitor C4 to pull the base electrode of the second triode Q2 and the gate potential of the first MOS tube M1 high, so that the second triode Q2 and the first MOS tube M1 are in a conducting state, the fourth triode Q4 and the fifth triode Q5 are in a cut-off state, and at this time, the LED lamp module 9 is in medium brightness and the reflector is in a second angle. When the LED breaks down, the potential of the base electrode of the first triode Q1 rises, the cut-off state is changed into the conduction state, the second triode Q2 is changed into the cut-off state, the LED is disconnected, and the self-locking protection function is started.
When the high beam and low beam light control circuit receives the high beam light signal and the low beam light signal at the same time, the first MOS tube M1 is in conduction, the fourth triode Q4 and the fifth triode Q5 are cut off, the LED lamp module 9 is in medium brightness, and the reflecting plate is in a second angle. Compared with the prior art, the far and near light control circuit provided by the embodiment does not need a software control system, is basically controlled by hardware, reduces the dependence on software and has low cost. Furthermore, the LED lamp has a hardware diagnosis protection function, when the LED lamp is in fault and short-circuited, the hardware automatically completes the short-circuit protection, so that the burning of the LED lamp is prevented, and the risk of ignition and the like of the whole vehicle is reduced; still further, the function of switching the high beam and the low beam is realized through the reflector adjustor 8 and a group of LED lamps, the brightness of the high beam can be adjusted through increasing and decreasing the brightness adjusting module, and the design of the LED lamps is not required to be changed; when the control circuit receives the high beam light signal and the low beam light signal at the same time, the control circuit automatically responds to the low beam light function, can temporarily meet the driving requirement, and ensures the safety.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a far and near light control circuit which comprises a reflector regulator, an LED lamp module, an LED starting module, a brightness control module and a first brightness regulation module, wherein when a signal of a far light power supply is received, a fourth triode and a fifth triode are conducted, a second triode is conducted, the LED lamp module is in a high brightness state, and a reflector is in a first angle; when a dipped headlight power supply signal is received, the first MOS tube is conducted with the second triode, the fourth triode and the fifth triode are cut off, the LED lamp module is in medium brightness, and the reflecting plate is in a second angle; when the high beam power supply and the low beam power supply signals are received at the same time, the first MOS tube is conducted, the fourth triode and the fifth triode are cut off, and the LED lamp module is in medium brightness. Therefore, compared with the prior art, the switching of the high beam and low beam lamps can be realized through a hardware circuit, a software control system is not needed, and the software dependence is reduced.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present invention, and are not to be construed as limiting the scope of the invention. It should be noted that any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without departing from the spirit and principles of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The far-near light control circuit is characterized by comprising a reflector regulator, an LED lamp module, an LED starting module, a brightness control module and a first brightness regulation module; wherein,,
the first input end of the reflector regulator is connected with a high beam power supply, the second input end of the reflector regulator is connected with a low beam power supply, the third input end of the reflector regulator is connected with a battery power supply, and the grounding end of the reflector regulator is grounded;
when the reflector regulator receives a high beam power supply signal, controlling the angle of the reflector to be a first angle; when a dipped headlight power supply signal is received, controlling the angle of the reflecting plate to be a second angle; when the low beam power supply signal and the high beam power supply signal are received at the same time, controlling the angle of the reflecting plate to be the second angle;
the LED starting module comprises a second triode, the base electrode of the second triode is connected with the high beam power supply and the low beam power supply, the collector electrode of the second triode is connected with the output end of the LED lamp module, and the emitter electrode of the second triode is grounded;
the brightness control module comprises a first MOS tube, the drain electrode of the first MOS tube is connected with the high beam power supply, the grid electrode of the first MOS tube is connected with the low beam power supply, and the source electrode of the first MOS tube is grounded;
the first brightness adjusting module comprises a fourth triode, the collector electrode of the fourth triode is connected with the collector electrode of the second triode and the output end of the LED lamp module, the emitter electrode of the fourth triode is grounded, and the base electrode of the fourth triode is connected with the drain electrode of the first MOS tube;
the input end of the LED lamp module is connected with the high beam power supply, and the input end of the LED lamp module is connected with the low beam power supply.
2. The high and low beam control circuit of claim 1, wherein the first brightness adjustment module further comprises an eleventh resistor, and the high and low beam control circuit further comprises an eighth capacitor;
the emitter of the fourth triode is grounded specifically as follows: the emitter of the fourth triode is grounded through the eleventh resistor;
the base electrode of the fourth triode is also connected with the ground through the eighth capacitor.
3. The high-low beam control circuit of claim 1, further comprising a first short-circuit protection module comprising a first triode, a fourth resistor, a sixth resistor, a seventh resistor, and a seventh capacitor; wherein,,
the collector electrode of the first triode is connected with the base electrode of the second triode, the base electrode of the first triode is connected with the first end of the fourth resistor, and the emitter electrode of the first triode is grounded;
the second end of the fourth resistor is connected with the emitter of the second triode, the first end of the sixth resistor, the first end of the seventh resistor and the first end of the seventh capacitor;
the second end of the sixth resistor, the second end of the seventh resistor and the second end of the seventh capacitor are grounded.
4. The high-low beam control circuit of claim 1, further comprising a second short-circuit protection module comprising a third triode, a tenth resistor, a twelfth resistor, a thirteenth resistor, and a ninth capacitor; wherein,,
the collector electrode of the third triode is connected with the high beam power supply, the base electrode of the third triode is connected with the first end of the tenth resistor, and the emitter electrode of the third triode is grounded;
the second end of the tenth resistor is connected with the emitter of the fourth triode, the first end of the twelfth resistor, the first end of the thirteenth resistor and the first end of the ninth capacitor;
a second terminal of the twelfth resistor, a second terminal of the thirteenth resistor, and a second terminal of the ninth capacitor are grounded.
5. The high-low beam control circuit of claim 1, further comprising a first power supply voltage regulation filter module comprising a first TVS tube, a second diode, a first capacitor, and a second capacitor; wherein,,
the first end of the first TVS tube is connected with the high beam power supply, the anode of the second diode and the first end of the first capacitor, and the second end of the first TVS tube is grounded;
the second end of the first capacitor is connected with the first end of the second capacitor, and the second end of the second capacitor is grounded;
the input end of the LED lamp module is connected with the high beam power supply specifically as follows: the high beam power supply is connected with the input end of the LED lamp module through the second diode, wherein the high beam power supply is connected with the anode of the second diode, and the cathode of the second diode is connected with the input end of the LED lamp module.
6. The high-low beam control circuit of claim 1, further comprising a second power supply voltage regulation filter module comprising a second TVS tube, a third diode, a third capacitor, and a fourth capacitor; wherein,,
the first end of the second TVS tube is connected with the dipped headlight power supply, the anode of the third triode and the first end of the third capacitor, and the second end of the second TVS tube is grounded;
the second end of the third capacitor is connected with the first end of the fourth capacitor, and the second end of the fourth capacitor is grounded;
the input end of the LED lamp module is connected with the dipped headlight power supply specifically: the low beam light power supply is connected with the input end of the LED lamp module through the third diode, wherein the low beam light power supply is connected with the anode of the third diode, and the cathode of the third diode is connected with the input end of the LED lamp module.
7. The high-low beam control circuit of claim 1, further comprising a third power supply voltage regulation filter module comprising a third TVS tube and a twelfth capacitor; wherein,,
the storage battery power supply is connected with the first end of the third TVS tube, the third input end of the reflector regulator and the first end of the twelfth capacitor, the second end of the third TVS tube is grounded, and the second end of the twelfth capacitor is grounded.
8. The high-low beam control circuit of claim 1, wherein the brightness control module further comprises a fourth diode, a sixth capacitor, an eighth resistor, and a fifth resistor; wherein,,
the grid electrode of the first MOS tube is connected with the dipped headlight power supply specifically: the dipped headlight power supply is connected with the first end of the fifth resistor, and the second end of the fifth resistor is connected with the grid electrode of the first MOS tube;
the second end of the fifth resistor is also connected with the cathode of the fourth diode, the first end of the sixth capacitor and the first end of the eighth resistor;
an anode of the fourth diode, a second end of the sixth capacitor, and a second end of the eighth resistor are grounded; the fourth diode is a voltage stabilizing tube.
9. The high and low beam control circuit of claim 1, further comprising a fifth capacitor and an eleventh capacitor, wherein,
the input end of the LED lamp module is connected with the first end of the eleventh capacitor, and the output end of the LED lamp module is connected with the second end of the eleventh capacitor;
the base electrode of the second triode is connected with the first end of the fifth capacitor, and the emitter electrode of the second triode and the second end of the fifth capacitor are grounded.
10. The high and low beam control circuit of claim 1, further comprising a first diode, a first resistor, a second resistor, a third resistor, and a ninth resistor; wherein,,
the first input end of the reflector regulator is connected with a high beam power supply specifically: the first input end of the reflector regulator is connected with a high beam power supply through a first resistor;
the second input end of the reflector regulator is connected with a dipped headlight power supply specifically: the second input end of the reflector regulator is connected with a dipped headlight power supply through a second resistor;
the positive pole of first diode with the far-reaching headlamp power is connected, the negative pole of first diode with the first end of ninth resistance is connected, the second end of ninth resistance with the base of fourth triode is connected, the first end of third resistance with the dipped headlight power with the far-reaching headlamp power is connected, the second end of third resistance with the base of second triode is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210516880.2A CN114801976B (en) | 2022-05-12 | 2022-05-12 | High-beam and low-beam lamp control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210516880.2A CN114801976B (en) | 2022-05-12 | 2022-05-12 | High-beam and low-beam lamp control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114801976A CN114801976A (en) | 2022-07-29 |
| CN114801976B true CN114801976B (en) | 2023-07-07 |
Family
ID=82512857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210516880.2A Active CN114801976B (en) | 2022-05-12 | 2022-05-12 | High-beam and low-beam lamp control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114801976B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115413087B (en) * | 2022-09-01 | 2023-04-07 | 广东卡沃罗氢科技有限公司 | Temperature detection and LED lamp switching circuit and hydrogen-rich water kettle |
| TWI902210B (en) * | 2024-04-09 | 2025-10-21 | 威力暘電子股份有限公司 | Controller for low beam and high beam |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3808965A1 (en) * | 1988-03-17 | 1988-12-01 | Raimund Dr Rer Nat Oberschmid | Combined device for warning of the onset of dusk and monitoring lights, in particular for vehicles |
| FR2995492A1 (en) * | 2012-09-11 | 2014-03-14 | Zedel | PORTABLE ELECTRIC LAMP WITH ANTI-GLARE SYSTEM |
| CN113212303A (en) * | 2021-04-19 | 2021-08-06 | 东风柳州汽车有限公司 | Automatic control method and system for vehicle emergency response light system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2074262U (en) * | 1990-09-29 | 1991-04-03 | 翟宗耀 | Automatic dimming means for headlight of vehicle |
| JP6131510B2 (en) * | 2013-09-10 | 2017-05-24 | パナソニックＩｐマネジメント株式会社 | Lighting device, headlight device using the same, and vehicle |
| TWI555654B (en) * | 2013-11-20 | 2016-11-01 | 吳長洲 | Headlamp control system |
| CN104670072A (en) * | 2015-02-14 | 2015-06-03 | 王攀 | Automatic high beam and low beam adjustment controller for automobile headlights |
| JP6933548B2 (en) * | 2017-05-11 | 2021-09-08 | 株式会社小糸製作所 | Drive circuit, vehicle lighting equipment |
| CN109769320A (en) * | 2019-02-27 | 2019-05-17 | 深圳市晟瑞科技有限公司 | A control circuit and control device for adjusting light parameters with two lines |
| CN111688571A (en) * | 2020-07-02 | 2020-09-22 | 常州倍速智能科技有限公司 | Lighting device capable of realizing free switching of high beam and low beam |
-
2022
- 2022-05-12 CN CN202210516880.2A patent/CN114801976B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3808965A1 (en) * | 1988-03-17 | 1988-12-01 | Raimund Dr Rer Nat Oberschmid | Combined device for warning of the onset of dusk and monitoring lights, in particular for vehicles |
| FR2995492A1 (en) * | 2012-09-11 | 2014-03-14 | Zedel | PORTABLE ELECTRIC LAMP WITH ANTI-GLARE SYSTEM |
| CN113212303A (en) * | 2021-04-19 | 2021-08-06 | 东风柳州汽车有限公司 | Automatic control method and system for vehicle emergency response light system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114801976A (en) | 2022-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114801976B (en) | High-beam and low-beam lamp control circuit | |
| US9162607B2 (en) | Vehicular lamp | |
| CN207425326U (en) | The LED backlight drive circuit of head up display | |
| CN111818704B (en) | Programmable car lamp controller | |
| US20060061301A1 (en) | Lighting control circuit for vehicle lighting equipment | |
| JP3878823B2 (en) | Vehicle lamp device | |
| CN218616437U (en) | Two-lamp type automobile high beam and low beam control circuit | |
| CN207491270U (en) | LED lamp control circuit and LED lamp | |
| CN213167865U (en) | Auxiliary high beam control system | |
| CN223652398U (en) | Afterglow eliminating circuit | |
| CN223899371U (en) | A circuit for controlling automotive LED matrix using discrete devices | |
| CN210491275U (en) | Automobile headlamp drive circuit suitable for multiple LED strings | |
| CN115942550A (en) | Multi-pixel LED control system for automobile lamp | |
| CN118160412A (en) | Driver for LED retrofitting with PWM correction unit, LED retrofitting, and vehicle headlight | |
| CN223207290U (en) | PWM absorption line | |
| TWI719818B (en) | Laser driving and control apparatus and control method in the vehicle laser headlight applications | |
| CN118555704B (en) | A vehicle-mounted LED lighting system with a control circuit | |
| CN215010466U (en) | Vehicle-mounted camera | |
| CN221329172U (en) | MOS tube circuit of pulse non-flashing lamp | |
| CN219960880U (en) | Enabling control circuit based on discrete device | |
| CN223798382U (en) | An LED lamp synchronization control circuit | |
| CN221467947U (en) | High-beam and low-beam lamp control circuit | |
| CN114954205B (en) | Car light switching control system and car | |
| CN119421290A (en) | Headlamp driving circuit and headlamp based on constant current drive | |
| CN218071857U (en) | Bright intensity control circuit of car LED headlight |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |