CN114801976A - Far and near light lamp control circuit - Google Patents
Far and near light lamp control circuit Download PDFInfo
- Publication number
- CN114801976A CN114801976A CN202210516880.2A CN202210516880A CN114801976A CN 114801976 A CN114801976 A CN 114801976A CN 202210516880 A CN202210516880 A CN 202210516880A CN 114801976 A CN114801976 A CN 114801976A
- Authority
- CN
- China
- Prior art keywords
- triode
- resistor
- capacitor
- power supply
- 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.)
- Granted
Links
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 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 power supply signal of the dipped headlight is received, the first MOS tube and the second triode are conducted, the fourth triode and the fifth triode are cut off, the LED lamp module is in medium brightness, and the reflector is in a second angle; when receiving the power supply signals of the high beam light and the low beam light at the same time, the first MOS tube is conducted, the fourth triode and the fifth triode are cut off, and the LED light module is in medium brightness. Therefore, compared with the prior art, the switching of the high beam and the low beam 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 vehicle lamp control, in particular to a far and near light control circuit.
Background
At present, with the increasingly obvious advantages of LED lamps, the automobile headlamp generally adopts the LED lamps, but the cost of the LED headlamp is high, the LED headlamp depends on a control chip of the automobile headlamp, and a corresponding control system is more complex than that of a halogen lamp. However, in the prior art, switching of the high beam and the low beam is generally realized by software and is manually switched, and the method is high in cost. Therefore, a control method or product with low software dependency is needed to solve the problem of how to implement automatic switching of high and low beam lights.
Disclosure of Invention
The invention provides a far and near light control circuit, which realizes the automatic switching of the far and near light and reduces the dependence on software.
In order to solve the above technical problems, an embodiment of the present invention provides a high beam and low beam control circuit, which includes a reflector adjuster, an LED lamp module, an LED start module, a brightness control module, and a first brightness adjustment module; wherein the content of the first and second substances,
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 dipped headlight power supply, the third input end of the reflector regulator is connected with a storage battery power supply, and the grounding end of the reflector regulator is grounded;
the reflector regulator controls the angle of the reflector to be a first angle when receiving a power supply signal of the high beam lamp; when a power supply signal of the dipped headlight is received, controlling the angle of the reflector to be a second angle; when a low beam lamp power supply signal and a high beam lamp power supply signal are received at the same time, controlling the angle of the reflector 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 light power supply and the dipped headlight power supply, the collector electrode of the second triode is connected with the output end of the LED lamp module, and the emitting 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 dipped headlight power supply, and the source electrode of the first MOS tube is grounded;
the first brightness adjusting module comprises a fourth triode, a collector of the fourth triode is connected with a collector of the second triode and an output end of the LED lamp module, an emitter of the fourth triode is grounded, and a base of the fourth triode is connected with a drain of the first MOS tube;
the input of LED lamp module with the far-reaching headlamp power is connected, the input of LED lamp module with the passing lamp power is connected.
Preferably, the first brightness adjusting module further includes an eleventh resistor, and the high beam and low beam control circuit further includes an eighth capacitor;
the grounding of the emitter of the fourth triode is specifically as follows: an emitter of the fourth triode is grounded through the eleventh resistor;
and the base electrode of the fourth triode is also connected with the ground through the eighth capacitor.
As a preferred scheme, the far and 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 content of the first and second substances,
a collector of the first triode is connected with a base of the second triode, the base of the first triode is connected with a first end of the fourth resistor, and an emitter of the first triode is grounded;
a second end of the fourth resistor is connected with an emitting electrode of the second triode, a first end of the sixth resistor, a first end of the seventh resistor and a first end of the seventh capacitor;
a second end of the sixth resistor, a second end of the seventh resistor, and a second end of the seventh capacitor are grounded.
As a preferred scheme, the far and 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 content of the first and second substances,
a collector of the third triode is connected with the high beam power supply, a base of the third triode is connected with a first end of the tenth resistor, and an emitter of the third triode is grounded;
a second end of the tenth resistor is connected with an emitter of the fourth triode, a first end of the twelfth resistor, a first end of the thirteenth resistor and a first end of the ninth capacitor;
a second end of the twelfth resistor, a second end of the thirteenth resistor and a second end of the ninth capacitor are grounded.
As a preferred scheme, the far and near light control circuit further comprises a first power supply voltage stabilization filtering module, wherein the first power supply voltage stabilization filtering module comprises a first TVS tube, a second diode, a first capacitor and a second capacitor; wherein the content of the first and second substances,
the first end of the first TVS tube is connected with the high beam lamp 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 of LED lamp module with far-reaching headlamp power is connected specifically and is: the high beam lamp power supply is connected with the input end of the LED lamp module through the second diode, wherein the high beam lamp 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 preferred scheme, the far and near light control circuit further comprises a second power supply voltage-stabilizing filtering module, wherein the second power supply voltage-stabilizing filtering module comprises a second TVS tube, a third diode, a third capacitor and a fourth capacitor; wherein the content of the first and second substances,
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 of LED lamp module with the passing lamp power connection specifically does: the dipped headlight power supply is connected with the input end of the LED lamp module through the third diode, wherein the dipped headlight 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 a preferred scheme, the far and near light control circuit further comprises a third power supply voltage-stabilizing filtering module, wherein the third power supply voltage-stabilizing filtering module comprises a third TVS tube and a twelfth capacitor; wherein the content of the first and second substances,
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.
Preferably, the brightness control module further includes a fourth diode, a sixth capacitor, an eighth resistor, and a fifth resistor; wherein the content of the first and second substances,
the grid of the first MOS tube is connected with the dipped headlight power supply, and specifically comprises the following steps: the dipped headlight power supply is connected with a first end of the fifth resistor, and a second end of the fifth resistor is connected with a grid electrode of the first MOS tube;
the second end of the fifth resistor is further 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 regulator tube.
Preferably, the high beam and low beam 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;
and 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 both grounded.
As a preferred scheme, the far and near light control circuit further comprises a first diode, a first resistor, a second resistor, a third resistor and a ninth resistor; wherein the content of the first and second substances,
the first input end of the reflector regulator is connected with the high beam power supply and specifically comprises: 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 the dipped headlight power supply and specifically comprises: a 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 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 passing light power with 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 the reflector is in a first angle; when a power supply signal of the dipped headlight is received, the first MOS tube and the second triode are conducted, the fourth triode and the fifth triode are cut off, the LED lamp module is in medium brightness, and the reflector is in a second angle; when receiving the power supply signals of the high beam light and the low beam light at the same time, the first MOS tube is conducted, the fourth triode and the fifth triode are cut off, and the LED light module is in medium brightness. Therefore, compared with the prior art, the switching of the high beam and the low beam can be realized through a hardware circuit, a software control system is not needed, and the software dependence is reduced.
Drawings
FIG. 1: the present invention provides a schematic structural diagram of an embodiment of a high beam and low beam control circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, fig. 1 is a far and near light control circuit according to an embodiment of the present invention, which includes a first power supply voltage-stabilizing filter module 1, a second power supply voltage-stabilizing filter module 2, a third power supply voltage-stabilizing filter module 3, a first short-circuit protection module 4, a second short-circuit protection module 5, an LED turn-on module 6, a brightness control module 7, a reflector regulator 8, an LED lamp module 9, a first brightness regulation module 10, and a second brightness regulation module 11,
a first input end of the reflector regulator 8 is connected with a high beam power supply V1, a second input end of the reflector regulator 8 is connected with a low beam power supply V2, a third input end of the reflector regulator 8 is connected with a battery power supply V3, and a 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 high beam signals, and a low beam power supply V2 provides low beam signals. When the reflector regulator 8 receives a signal of a high beam lamp power supply V1, controlling the angle of the reflector to be a first angle; when a low beam power supply V2 signal is received, the angle of the reflector is controlled to be a second angle; when the dipped headlight power supply signal and the high beam power supply signal are received at the same time, judging that the high beam system and the low beam system are abnormal, and controlling the angle of the reflector to be the second angle;
the LED turn-on module 6 includes a second triode Q2, a base of the second triode Q2 is connected to the high beam power supply V1 and the dipped headlight power supply V2, a collector of the second triode Q2 is connected to an output terminal of the LED light module 9, and an emitter of the second triode Q2 is grounded;
the brightness control module 7 comprises a first MOS transistor M1, a drain of the first MOS transistor M1 is connected to the high beam power supply V1, a gate of the first MOS transistor M1 is connected to the low beam power supply V2, and a source of the first MOS transistor M1 is grounded;
the first brightness adjusting module 10 includes a fourth transistor Q4, a collector of the fourth transistor Q4 is connected to a collector of the second transistor Q2 and an output end of the LED lamp module 9, an emitter of the fourth transistor Q4 is grounded, and a base of the fourth transistor Q4 is connected to 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 high beam and low beam control circuit further includes an eighth capacitor C8;
the grounding of the emitter of the fourth triode Q4 is specifically as follows: the emitter of the fourth triode Q4 is grounded through the eleventh resistor R11;
the base of the fourth transistor Q4 is also connected to ground through the eighth capacitor C8.
As an example of this embodiment, the high beam and low beam control circuit further includes a second brightness adjusting module 11, where the second brightness adjusting module 11 includes a fifth transistor Q5, a fourth capacitor C4, a tenth capacitor C10, and a fourteenth resistor R14; the collector of the fifth triode Q5 is connected to the collector of the fourth triode Q4, the base of the fifth triode Q5 is grounded through the tenth capacitor C10 and is also connected to the base of the fourth triode Q4, and the emitter of the fifth triode Q5 is connected to the second end of the eleventh resistor R11 through the fourteenth resistor R14. In the embodiment, more brightness adjusting modules can be arranged to enable the LED lamp module 9 to obtain a larger brightness adjusting range, and meanwhile, the brightness of the high beam can be better set.
Further, the first short-circuit protection module 4 includes a first transistor Q1, a fourth resistor R4, a sixth resistor R6, a seventh resistor R7, and a seventh capacitor C7;
a collector of the first triode Q1 is connected with a base of the second triode Q2, a base of the first triode Q1 is connected with a first end of the fourth resistor R4, and an emitter of the first triode Q1 is grounded;
a second end of the fourth resistor R4 is connected to an emitter of the second transistor Q2, a first end of the sixth resistor R6, a first end of the seventh resistor R7, and a 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-and-near light control circuit further includes a second short-circuit protection module 5, where the second short-circuit protection module 5 includes a third transistor Q3, a tenth resistor R10, a twelfth resistor R12, a thirteenth resistor R13, and a ninth capacitor C9; wherein the content of the first and second substances,
a collector of the third triode Q3 is connected with the high beam power supply V1, a base of the third triode Q3 is connected with a first end of the tenth resistor R10, and an emitter of the third triode Q3 is grounded;
a second end of the tenth resistor R10 is connected to an emitter of the fourth transistor Q4, a first end of the twelfth resistor R12, a first end of the thirteenth resistor R13, and a 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 transistor T1, a second diode D2, a first capacitor C1 and a second capacitor C2; wherein the second diode D2 is used to prevent reverse connection.
A first terminal of the first TVS tube T1 is connected to the high beam power supply V1, the anode of the second diode D2 and the first terminal of the first capacitor C1, and a second terminal 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: the high beam power supply V1 is connected to the input terminal of the LED lamp module 9 through the second diode D2, wherein the high beam power supply V1 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the input terminal of the LED lamp module 9.
The second power supply voltage stabilizing and filtering module 2 comprises a second TVS transistor T2, a third diode D3, a third capacitor C3 and a fourth capacitor C4; wherein the third diode D3 is used to prevent reverse connection.
A first end of the second TVS transistor T2 is connected to the dipped headlight power supply V2, an anode of the third transistor Q3 and a first end of the third capacitor C3, and a second end of the second TVS transistor 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 low beam light power supply V2 is connected to the input terminal of the LED light module 9 through the third diode D3, wherein the low beam light power supply V2 is connected to the anode of the third diode D3, and the cathode of the third diode D3 is connected to the input terminal of the LED light module 9.
The third power supply voltage stabilizing and filtering module 3 comprises a third TVS transistor T3 and a twelfth capacitor C12; wherein the content of the first and second substances,
the storage 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 both 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 connection between the gate of the first MOS transistor M1 and the dipped headlight power supply V2 is specifically: the dipped headlight power supply V2 is connected with a first end of the fifth resistor R5, and a second end of the fifth resistor R5 is connected with the gate of the first MOS transistor M1;
the second end of the fifth resistor R5 is further connected with the cathode of the fourth diode D4, the first end of the sixth capacitor C6 and the first end of the eighth resistor R8;
an anode of the fourth diode D4, a second terminal of the sixth capacitor C6, and a second terminal of the eighth resistor R8 are all grounded.
Preferably, the high beam and low beam control circuit further includes 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 to the first end of the eleventh capacitor C11, and the output end of the LED lamp module 9 is connected to the second end of the eleventh capacitor C11;
the base of the second transistor Q2 is connected to the first terminal of the fifth capacitor C5, the emitter of the second transistor Q2 is grounded, and the second terminal of the fifth capacitor C5 is grounded.
The grounding of the emitter of the second triode Q2 is specifically as follows: the LED turn-on module further comprises 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 a high beam power supply V1, and specifically: a 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 a dipped headlight power supply V2, specifically: a second input end of the reflector regulator 8 is connected with a dipped headlight power supply V2 through a second resistor R2;
the anode of the first diode D1 is connected to the high beam power supply V1, the cathode of the first diode D1 is connected to the first end of the ninth resistor R9, the second end of the ninth resistor R9 is connected to the base of the fourth transistor Q4, the first end of the third resistor R3 is connected to the low beam power supply V2 through the third diode D3 and to the cathode of the third diode D3, the first end of the third resistor R3 is also connected to the high beam power supply through the second diode D2 and to the cathode of the second diode D2, and the second end of the third resistor R3 is connected to the base of the second transistor.
The LED lamp module 9 preferably comprises eight LED lamps, namely a first LED lamp (LED1), a second LED lamp (LED2), a third LED lamp (LED3), a fourth LED lamp (LED4), a fifth LED lamp (LED5), a sixth LED lamp (LED6), a seventh LED lamp (LED7), and an eighth LED lamp (LED 8).
An anode of the first LED lamp (LED1) and an anode of the second LED lamp (LED2) are input terminals of the LED lamp module 9, and an anode of the first LED lamp (LED1) and an anode of the second LED lamp (LED2) are connected to a first end of the eleventh capacitor C11, a cathode of the first LED lamp (LED1) is connected to a cathode of the second LED lamp (LED2), an anode of the third LED lamp (LED3) and an anode of the fourth LED lamp (LED4), a cathode of the third LED lamp (LED3) is connected to a cathode of the fourth LED lamp (LED4), an anode of the fifth LED lamp (LED5), an anode of the sixth LED lamp (LED6), a cathode of the fifth LED lamp (LED5) is connected to a cathode of the sixth LED lamp (LED6), an anode of the seventh LED lamp (LED7) and an anode of the eighth LED lamp (LED8), a cathode of the fifth LED lamp (LED5) is connected to a cathode of the sixth LED lamp (LED6), an anode of the eighth LED lamp (LED 465) is connected to the eighth capacitor C7), and the cathode of the eighth LED lamp (LED module 5924) is connected to the LED module .
When the high beam and low beam control circuit receives a high beam signal, the high beam power supply V1 pulls up the base terminal potentials of the fourth triode Q4 and the fifth triode Q5 through the clamping of the first TVS tube T1 and the filtering of the first capacitor C1 and the second capacitor C2, at this time, the fourth triode Q4 and the fifth triode Q5 are both in a conducting state, the light emitting diodes in the LED lamp module 9 are both in a high brightness state, the reflector is in a first angle, and the base terminals potentials of the first triode Q1 and the third triode Q3 are relatively low, so that the high beam and low beam control circuit is in a cut-off state. When the light emitting diodes in the LED lamp module 9 break down and other faults occur, the base potentials of the first triode Q1 and the third triode Q3 rise, and are converted from a cut-off state to a conduction state, at this time, the base potentials of the second triode Q2, the fourth triode Q4 and the fifth triode Q5 are pulled low, and are changed from conduction to cut-off, and meanwhile, the light emitting diodes of the LED lamp module 9 are all cut off and in a conduction state, and the self-locking protection function is started.
When the high beam and low beam control circuit receives a low beam signal, the low beam power supply V2 is clamped by the second TVS transistor T2, and the base of the second triode Q2 and the gate potential of the first MOS transistor M1 are pulled high through the filtering of the third capacitor C3 and the fourth capacitor C4, so that the second triode Q2 and the first MOS transistor M1 are in a conducting state, the fourth triode Q4 and the fifth triode Q5 are in a blocking state, and at this time, the LED lamp module 9 is at a medium brightness and the reflector is at a second angle. When the light-emitting diode has faults such as breakdown, the base electrode potential of the first triode Q1 is increased and is changed from cut-off to conduction, the second triode Q2 is changed to cut-off state, the light-emitting diode is cut off, and the self-locking protection function is started.
When the high beam and low beam control circuit receives the high beam signal and the low beam signal at the same time, the first MOS transistor M1 is turned on, the fourth triode Q4 and the fifth triode Q5 are turned off, the LED lamp module 9 is at the medium brightness, and the reflector is at the 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 system has a hardware diagnosis protection function, when the LED lamp is in fault and is in short circuit, the hardware automatically completes short circuit protection, the LED lamp is prevented from being burnt out, and the risk of ignition and the like of the whole vehicle is reduced; furthermore, the function of switching the high beam and the low beam is realized through the reflector regulator 8 and the group of LED lamps, the brightness of the high beam can be regulated by increasing or decreasing the brightness regulating module, and the design of the LED lamps is not required to be changed; when the control circuit receives the high beam and low beam signals at the same time, the function of the low beam is automatically responded, the requirement of driving can be temporarily met, and the safety is guaranteed.
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 regulating 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 power supply signal of the dipped headlight is received, the first MOS tube and the second triode are conducted, the fourth triode and the fifth triode are cut off, the LED lamp module is in medium brightness, and the reflector is in a second angle; when receiving the power supply signals of the high beam light and the low beam light at the same time, the first MOS tube is conducted, the fourth triode and the fifth triode are cut off, and the LED light module is in medium brightness. Therefore, compared with the prior art, the switching of the high beam and the low beam can be realized through a hardware circuit, a software control system is not needed, and the software dependence is reduced.
The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, and it should be understood that the above-mentioned embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.
Claims (10)
1. A high beam and low beam 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 regulating module; wherein the content of the first and second substances,
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 dipped headlight power supply, the third input end of the reflector regulator is connected with a storage battery power supply, and the grounding end of the reflector regulator is grounded;
the reflector regulator controls the angle of the reflector to be a first angle when receiving a power supply signal of the high beam lamp; when a power supply signal of the dipped headlight is received, controlling the angle of the reflector to be a second angle; when a low beam lamp power supply signal and a high beam lamp power supply signal are received at the same time, controlling the angle of the reflector 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 light power supply and the dipped headlight power supply, the collector electrode of the second triode is connected with the output end of the LED lamp module, and the emitting 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 dipped headlight power supply, and the source electrode of the first MOS tube is grounded;
the first brightness adjusting module comprises a fourth triode, a collector of the fourth triode is connected with a collector of the second triode and an output end of the LED lamp module, an emitter of the fourth triode is grounded, and a base of the fourth triode is connected with a drain of the first MOS tube;
the input of LED lamp module with the far-reaching headlamp power is connected, the input of LED lamp module with the passing lamp power is connected.
2. The high beam and low beam control circuit of claim 1, wherein said first brightness adjustment module further comprises an eleventh resistor, said high beam and low beam control circuit further comprises an eighth capacitor;
the grounding of the emitter of the fourth triode is specifically as follows: an emitter of the fourth triode is grounded through the eleventh resistor;
and the base electrode of the fourth triode is also connected with the ground through the eighth capacitor.
3. The far-near light control circuit according to claim 1, further comprising 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 content of the first and second substances,
a collector of the first triode is connected with a base of the second triode, the base of the first triode is connected with a first end of the fourth resistor, and an emitter of the first triode is grounded;
a second end of the fourth resistor is connected with an emitting electrode of the second triode, a first end of the sixth resistor, a first end of the seventh resistor and a first end of the seventh capacitor;
a second end of the sixth resistor, a second end of the seventh resistor, and a second end of the seventh capacitor are grounded.
4. The far-near light control circuit according to claim 1, further comprising a second short-circuit protection module, wherein the second short-circuit protection module comprises a third transistor, a tenth resistor, a twelfth resistor, a thirteenth resistor and a ninth capacitor; wherein the content of the first and second substances,
a collector of the third triode is connected with the high beam power supply, a base of the third triode is connected with the first end of the tenth resistor, and an emitter of the third triode is grounded;
a second end of the tenth resistor is connected with an emitter of the fourth triode, a first end of the twelfth resistor, a first end of the thirteenth resistor and a first end of the ninth capacitor;
a second end of the twelfth resistor, a second end of the thirteenth resistor and a second end of the ninth capacitor are grounded.
5. The far-near light control circuit according to claim 1, further comprising a first power supply voltage-stabilizing filter module, wherein the first power supply voltage-stabilizing filter module comprises a first TVS tube, a second diode, a first capacitor and a second capacitor; wherein the content of the first and second substances,
the first end of the first TVS tube is connected with the high beam lamp 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 of LED lamp module with far-reaching headlamp power is connected specifically and is: the high beam lamp power supply is connected with the input end of the LED lamp module through the second diode, wherein the high beam lamp 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 far-near light control circuit according to claim 1, further comprising a second power source voltage-stabilizing filter module, wherein the second power source voltage-stabilizing filter module comprises a second TVS tube, a third diode, a third capacitor and a fourth capacitor; wherein the content of the first and second substances,
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;
a second end of the third capacitor is connected with a first end of the fourth capacitor, and a second end of the fourth capacitor is grounded;
the input of LED lamp module with the passing lamp power connection specifically does: the dipped headlight power supply is connected with the input end of the LED lamp module through the third diode, wherein the dipped headlight 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 far-near light control circuit according to claim 1, further comprising a third power supply voltage-stabilizing filter module, wherein said third power supply voltage-stabilizing filter module comprises a third TVS tube and a twelfth capacitor; wherein the content of the first and second substances,
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 beam and low beam control circuit of claim 1, wherein said brightness control module further comprises a fourth diode, a sixth capacitor, an eighth resistor and a fifth resistor; wherein the content of the first and second substances,
the grid electrode of the first MOS tube is connected with the dipped headlight power supply, and specifically comprises the following steps: the dipped headlight power supply is connected with a first end of the fifth resistor, and a second end of the fifth resistor is connected with a grid electrode of the first MOS tube;
the second end of the fifth resistor is further 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 regulator tube.
9. The far-near light control circuit according to 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;
and 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 both grounded.
10. The high beam 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 content of the first and second substances,
the first input end of the reflector regulator is connected with the high beam power supply and specifically comprises: 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 the dipped headlight power supply and specifically comprises: a 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 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 passing light power with 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 true CN114801976A (en) | 2022-07-29 |
| CN114801976B 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115413087A (en) * | 2022-09-01 | 2022-11-29 | 广东卡沃罗氢科技有限公司 | Temperature detection and LED lamp switching circuit and hydrogen-rich water kettle |
Citations (10)
| 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 |
| CN2074262U (en) * | 1990-09-29 | 1991-04-03 | 翟宗耀 | Automatic dimming means for headlight of vehicle |
| FR2995492A1 (en) * | 2012-09-11 | 2014-03-14 | Zedel | PORTABLE ELECTRIC LAMP WITH ANTI-GLARE SYSTEM |
| CN104427728A (en) * | 2013-09-10 | 2015-03-18 | 松下电器产业株式会社 | Lighting device, headlight apparatus using the same, and vehicle using the same |
| CN104648224A (en) * | 2013-11-20 | 2015-05-27 | 明志科技大学 | Headlamp control system |
| CN104670072A (en) * | 2015-02-14 | 2015-06-03 | 王攀 | Automatic high beam and low beam adjustment controller for automobile headlights |
| JP2018190701A (en) * | 2017-05-11 | 2018-11-29 | 株式会社小糸製作所 | Drive circuit and vehicle lamp |
| CN109769320A (en) * | 2019-02-27 | 2019-05-17 | 深圳市晟瑞科技有限公司 | A kind of two-wire adjusts the control circuit and control device of lighting programmers |
| 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 |
| 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 |
-
2022
- 2022-05-12 CN CN202210516880.2A patent/CN114801976B/en active Active
Patent Citations (10)
| 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 |
| CN2074262U (en) * | 1990-09-29 | 1991-04-03 | 翟宗耀 | Automatic dimming means for headlight of vehicle |
| FR2995492A1 (en) * | 2012-09-11 | 2014-03-14 | Zedel | PORTABLE ELECTRIC LAMP WITH ANTI-GLARE SYSTEM |
| CN104427728A (en) * | 2013-09-10 | 2015-03-18 | 松下电器产业株式会社 | Lighting device, headlight apparatus using the same, and vehicle using the same |
| CN104648224A (en) * | 2013-11-20 | 2015-05-27 | 明志科技大学 | Headlamp control system |
| CN104670072A (en) * | 2015-02-14 | 2015-06-03 | 王攀 | Automatic high beam and low beam adjustment controller for automobile headlights |
| JP2018190701A (en) * | 2017-05-11 | 2018-11-29 | 株式会社小糸製作所 | Drive circuit and vehicle lamp |
| CN109769320A (en) * | 2019-02-27 | 2019-05-17 | 深圳市晟瑞科技有限公司 | A kind of two-wire adjusts the control circuit and control device of lighting programmers |
| 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 |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115413087A (en) * | 2022-09-01 | 2022-11-29 | 广东卡沃罗氢科技有限公司 | Temperature detection and LED lamp switching circuit and hydrogen-rich water kettle |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114801976B (en) | 2023-07-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9162607B2 (en) | Vehicular lamp | |
| US7414524B2 (en) | Lighting control circuit for vehicle lighting equipment | |
| CN205830106U (en) | A kind of constant-current LED driving chip | |
| JP4087211B2 (en) | Vehicle lighting | |
| JP2008126958A (en) | Variable load type lighting circuit | |
| US20180339641A1 (en) | Lighting circuit and vehicle lamp | |
| CN114801976A (en) | Far and near light lamp control circuit | |
| CN111405702B (en) | Lighting system | |
| CN210491275U (en) | Automobile headlamp drive circuit suitable for multiple LED strings | |
| CN218616437U (en) | Two-lamp type automobile high beam and low beam control circuit | |
| CN219960880U (en) | Enabling control circuit based on discrete device | |
| CN108924997B (en) | Two-stage light adjusting circuit | |
| CN109005616B (en) | High-power driving power supply for LED automobile high-beam and low-beam light | |
| CN210670661U (en) | Undervoltage protection circuit | |
| CN218071857U (en) | Bright intensity control circuit of car LED headlight | |
| US20180070418A1 (en) | Voltage-dependent operation of individual light sources | |
| CN216820159U (en) | Linear constant-current LED drive circuit with temperature compensation function and car lamp control system thereof | |
| CN213662018U (en) | LED drive circuit and LED lamp | |
| CN221058470U (en) | LED (light-emitting diode) color matching circuit controlled by PWM (pulse-Width modulation) signals | |
| CN212628513U (en) | Switching circuit used in parallel with main switch | |
| CN215647509U (en) | Dimmer drive circuit | |
| CN117118032B (en) | Battery reverse connection preventing circuit and battery reverse connection preventing system | |
| CN215474788U (en) | Color temperature switching circuit of LED car lamp | |
| CN219164772U (en) | Notebook camera light filling lamp control circuit | |
| CN213462421U (en) | Dimming circuit and lamp |
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 |