CN220935365U - Far-near light car lamp switching control circuit - Google Patents
Far-near light car lamp switching control circuit Download PDFInfo
- Publication number
- CN220935365U CN220935365U CN202322501337.8U CN202322501337U CN220935365U CN 220935365 U CN220935365 U CN 220935365U CN 202322501337 U CN202322501337 U CN 202322501337U CN 220935365 U CN220935365 U CN 220935365U
- Authority
- CN
- China
- Prior art keywords
- pin
- mcu controller
- control circuit
- resistor
- low beam
- 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
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 17
- 238000002955 isolation Methods 0.000 claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 25
- 239000003381 stabilizer Substances 0.000 claims description 13
- 208000017740 grade III prostatic intraepithelial neoplasia Diseases 0.000 claims description 5
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
Classifications
-
- 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
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The utility model discloses a high-low beam vehicle lamp switching control circuit, which relates to the technical field of vehicle lamp control circuits and comprises a high-low beam isolation control circuit, an LDO voltage stabilizing circuit and an MCU controller; the output end of the far and near light isolation control circuit is connected with the first input end and the second input end of the MCU controller and is used for respectively controlling the conducting state trigger level signals of the first input end and the second input end of the MCU controller; the output end of the LDO voltage stabilizing circuit is connected with the positive power end of the MCU controller and is used for providing stable working voltage; the first output end and the second output end of the MCU controller are connected with the driving end and used for driving the working state of far and near light. On the basis of realizing the far and near light switching function, the utility model carries out integrated light adjustment on the control end.
Description
Technical Field
The utility model relates to the technical field of car lamp control circuits, and particularly provides a far-near light car lamp switching control circuit.
Background
At present, the electric operation is a necessary trend in the automobile industry, and the electric operation brings higher requirements for the light weight of the whole automobile wire harness. The high energy efficiency, long lifetime of LEDs, and the dramatic decrease in cost with increasing usage also provide the feasibility of centralized control. In addition, the control circuit of the far-near light switching electromagnetic valve of the headlight is independently controlled by other controllers, and also needs to be controlled by a single wire harness. The whole vehicle wire harness is more, the arrangement is complex, the weight is heavy, and the cost is high.
Disclosure of utility model
In order to solve at least one technical problem mentioned in the background art, the utility model aims to provide a high-low beam lamp switching control circuit which is used for carrying out integrated light adjustment on a control end on the basis of realizing a high-low beam lamp switching function.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a switching control circuit of high-low beam lamps comprises a high-low beam isolation control circuit, an LDO voltage stabilizing circuit and an MCU controller;
The output end of the far and near light isolation control circuit is connected with the first input end and the second input end of the MCU controller and is used for respectively controlling the conducting state trigger level signals of the first input end and the second input end of the MCU controller; the output end of the LDO voltage stabilizing circuit is connected with the positive power end of the MCU controller and is used for providing stable working voltage; the first output end and the second output end of the MCU controller are connected with the driving end and used for driving the working state of far and near light.
Further, the high-low beam isolation control circuit comprises a first control unit and a second control unit;
The first control unit is connected with the first input end of the MCU controller, and the second control unit is connected with the second input end of the MCU controller.
Further, the first control unit and the second control unit are respectively composed of a first tact switch, a second diode, a third diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a first optocoupler and a second optocoupler;
The first tact switch is connected in series with the first resistor through the second diode on a pin I of the first optocoupler; the fourth pin of the first optocoupler is connected with the first input end of the MCU through the second resistor; the second pin and the third pin of the first optocoupler are respectively grounded;
The second light touch switch is connected in series with the third resistor through the third diode on a first pin of the second optocoupler; the fourth pin of the second optocoupler is connected with the second input end of the MCU controller through the fourth resistor; and a second pin and a third pin of the second optocoupler are respectively grounded.
Further, the LDO voltage stabilizing circuit is composed of a fifth resistor, a first capacitor, a second capacitor, a third capacitor and a voltage stabilizer;
The fifth resistor and the first capacitor are connected in parallel to a pin III of the voltage stabilizer, a first end of the first capacitor is connected in parallel to a pin I of the voltage stabilizer, and the second capacitor and the third capacitor are connected in parallel to a pin II of the voltage stabilizer on a positive power supply end of the MCU controller.
Further, a reverse connection unit is arranged between the LDO voltage stabilizing circuit and the voltage input end;
further, the reverse connection unit comprises a first diode;
the first diode is connected in series between the fifth resistor and the voltage input terminal.
Further, the voltage stabilizer adopts a voltage stabilizing chip with the model number of TX3405, and the MCU controller adopts a two-way switching power supply chip with the model number of TPS 54386.
Compared with the prior art, the utility model has the beneficial effects that:
The utility model controls the on state of the MCU controller through the far and near light isolation control circuit, outputs PWM control signals through the MCU controller, and realizes the purpose of switching the working state of the far and near light through the driving end according to different control signals, thereby reducing the number of light control circuit harnesses and realizing the requirement of light weight of the control end of the car lamp in the design through an integrated mode.
Drawings
FIG. 1 is a schematic diagram of a switching control circuit for a high-beam and low-beam headlight according to the present utility model;
Fig. 2 is a schematic diagram of a high-low beam isolation control circuit in the high-low beam switching control circuit of the present utility model;
fig. 3 is a schematic diagram of an MCU controller and an LDO voltage stabilizing circuit in the switching control circuit of the high beam and low beam headlight of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 3, the present embodiment provides a switching control circuit for high beam and low beam lights, which includes a high beam and low beam isolation control circuit, an LDO voltage stabilizing circuit and an MCU controller;
The output end of the far and near light isolation control circuit is connected with a pin III and a pin IV of the MCU controller U1 and is used for respectively controlling the conducting state trigger level signals of the pin III and the pin IV of the MCU controller U1; the output end of the LDO voltage stabilizing circuit is connected with a first pin of the MCU controller U1 and is used for providing stable working voltage; and a pin five and a pin six of the MCU controller U1 are connected with the driving end and used for driving the working state of far and near light.
As shown in fig. 1, specifically, the grounded state in the MCU controller U1 is controlled by the far and near light isolation control circuit, so as to control the on state of the circuit in the MCU controller U1, thereby outputting a PWM control signal corresponding to a high level or a low level, and then controlling the driving circuit of the driving end according to different control signals, so as to achieve the purpose of switching the working state of the far and near light. The driving end comprises a low beam constant current drive (BUCK, BUCK-BOOST and SEPIC) and a high beam constant current drive (BUCK, BUCK-BOOST and SEPIC), and the high beam and the low beam are composed of LED light sources containing white and yellow. The quantity of light control circuit wire harnesses is reduced through an integrated mode, and a high-low beam isolation control circuit, an LDO voltage stabilizing circuit and an MCU controller U1 are adjusted through the integrated mode, so that the design requirement for light weight of a car lamp control end is met.
As shown in fig. 2, the high-low beam isolation control circuit comprises a first control unit and a second control unit; the first control unit is connected with a first input end of the MCU controller, and the second control unit is connected with a second input end of the MCU controller.
The first control unit and the second control unit are respectively composed of a first light touch switch SW1, a second light touch switch SW2, a second diode D2, a third diode D3, a first resistor RS1, a second resistor RS2, a third resistor RS3, a fourth resistor RS4, a first optocoupler IC2 and a second optocoupler IC 3;
the first light touch switch SW1 is connected in series with the first resistor RS1 through the second diode D2 on the first pin of the first optocoupler IC 2; the fourth pin of the first optocoupler IC2 is connected with the third pin of the MCU controller U1 through a second resistor RS 2; the second pin and the third pin of the first optocoupler IC2 are respectively grounded;
The second light touch switch SW2 is connected in series with a third resistor RS3 through a third diode D3 on a first pin of the second optocoupler IC 3; the fourth pin of the second optocoupler IC3 is connected with the fourth pin of the MCU controller U1 through a fourth resistor RS 4; and a second pin and a third pin of the second optocoupler IC3 are respectively grounded.
Specifically, the first light coupling IC2 is used for matching, 12V passes through the first light touch switch SW1, the second diode D2 and the first resistor RS1 to supply power to the luminous tubes in the first pin one and the second pin two of the first light coupling IC2, the resistance value of the third pin and the fourth pin acting on the first light coupling IC2 becomes smaller, the third pin of the MCU controller U1 contacts with the third pin and the fourth pin of the first light coupling IC2 in pairs through the second resistor RS2, and the sixth pin of the MCU controller U1 is triggered to send a PWM high potential to trigger a PWM pin for low beam driving, and at this time, a low beam is lighted. .
The second light coupling IC3 is matched, 12V passes through a second light touch switch SW2, a third diode D3 and fourth resistors RS4 supply power to luminous tubes in a first pin and a second pin of the second light coupling IC3, the resistance value of a third acting pin and a fourth pin of the second light coupling IC3 is reduced, a fourth pin of the MCU controller U1 passes through the fourth resistor, the third pin and the fourth pin of the second light coupling IC3 are contacted with each other in pairs, a fifth pin of the MCU controller U1 is triggered to send PWM high potential to trigger a PWM pin of high beam driving, and a high beam is lighted at the moment.
As shown in fig. 3, the LDO voltage stabilizing circuit is composed of a fifth resistor RS5, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a voltage stabilizer IC 1;
The fifth resistor RS5 and the first capacitor C1 are connected in parallel to the pin three of the voltage regulator IC1, the cathode of the first capacitor C1 is connected in parallel to the pin one of the voltage regulator IC1, and the second capacitor C2 and the third capacitor C3 are connected in parallel to the pin two of the voltage regulator IC1 and the pin one of the MCU controller U1.
Wherein, also include the first diode D1;
The first diode D1 is connected in series between the fifth resistor RS5 and the voltage input terminal.
Specifically, the voltage input end inputs 12V voltage, the voltage is reversely connected through the first diode D1, the voltage is limited through the fifth resistor RS5 to supply power to the voltage stabilizer IC1, the voltage stabilizer IC1 outputs 3.3V voltage, the first capacitor C1, the second capacitor C2 and the third capacitor C3 are filter capacitors, the 3.3V voltage is effectively stabilized, the voltage is supplied to the pin one of the MCU controller U1, after the MCU controller U1 is normally supplied with power, the internal receiving signal outputs two paths of PWM signals through the pin five and the pin six, the pin three of the MCU controller U1 is a function switching function, when the first tact switch SW1 is turned on, the pin three of the MCU controller U1 is contacted with the ground once, the internal of the MCU controller UI receives signals, the pin six of the MCU controller U1 is controlled to output PWM high potential, at this moment, and the like are lighted, the pin one of the lower beam is connected with the PEM pin of the lower beam driving end, and the lower beam driving lamp is controlled; when the first light touch switch SW1 is turned on, the pin III of the MCU controller U1 is contacted with the ground once again, the pin five and the pin six of the MCU controller U1 output high potential of PWM signals, PWM pins driven by far and near light are controlled, and the far and near light is lightened; when the first light touch switch SW1 is turned on again, the third pin of the MCU controller U1 is contacted with the ground once again, PWM signals of the fifth pin and the sixth pin of the MCU controller U1 are low level, PWM pins driven by far and near light are controlled, and a far and near light function is closed; so as to be recycled.
Specifically, pin four of the MCU controller U1 is an overtaking high beam flashing function, the flashing frequency is 1 HZ/switch once, when the second light touch switch SW2 is turned on, pin four of the MCU controller U1 outputs PWM high and low levels once every time the pin four of the MCU controller U1 contacts ground, the flashing function can appear when the PWM foot for driving the high beam is controlled by the PWM foot for driving the high beam, no matter which state pin three of the MCU controller U1 is in, and as long as the pin four of the MCU controller U1 is grounded once again when the second light touch switch SW2 is turned on again, the high beam can push the high beam to drive the flashing. When the fourth pin of the MCU controller U1 contacts the ground wire again, the duty ratio of the PWM pin of the fifth pin of the MCU controller U1 outputs a low level, the PWM pin corresponding to the high beam drive is closed, the high beam is closed, and the cycle is completed.
The voltage stabilizer IC1 adopts a voltage stabilizing chip with the model number of TX3405, and the MCU controller U1 adopts a two-way switching power supply chip with the model number of TPS 54386.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. The switching control circuit of the high-low beam vehicle lamp is characterized by comprising a high-low beam isolation control circuit, an LDO voltage stabilizing circuit and an MCU controller;
The output end of the far and near light isolation control circuit is connected with the first input end and the second input end of the MCU controller and is used for respectively controlling the conducting state trigger level signals of the first input end and the second input end of the MCU controller; the output end of the LDO voltage stabilizing circuit is connected with the positive power end of the MCU controller and is used for providing stable working voltage; the first output end and the second output end of the MCU controller are connected with the driving end and used for driving the working state of far and near light.
2. The high and low beam switching control circuit according to claim 1, wherein the high and low beam isolation control circuit comprises a first control unit and a second control unit;
The first control unit is connected with the first input end of the MCU controller, and the second control unit is connected with the second input end of the MCU controller.
3. The high-low beam headlight switching control circuit according to claim 2, wherein the first control unit is composed of a first tact switch, a second diode, a first resistor, a second resistor and a first optocoupler;
The first tact switch is connected in series with the first resistor through the second diode on a pin I of the first optocoupler; the fourth pin of the first optocoupler is connected with the first input end of the MCU through the second resistor; and the second pin and the third pin of the first optocoupler are respectively grounded.
4. The high-low beam headlight switching control circuit according to claim 2, wherein the second control unit is composed of a second light touch switch, a third diode, a third resistor, a fourth resistor and a second optocoupler;
The second light touch switch is connected in series with the third resistor through the third diode on a first pin of the second optocoupler; the fourth pin of the second optocoupler is connected with the second input end of the MCU controller through the fourth resistor; and a second pin and a third pin of the second optocoupler are respectively grounded.
5. The high-low beam switching control circuit of claim 1, wherein the LDO voltage regulator circuit is composed of a fifth resistor, a first capacitor, a second capacitor, a third capacitor and a voltage regulator;
The fifth resistor and the first capacitor are connected in parallel to a pin III of the voltage stabilizer, a first end of the first capacitor is connected in parallel to a pin I of the voltage stabilizer, and the second capacitor and the third capacitor are connected in parallel to a pin II of the voltage stabilizer on a positive power supply end of the MCU controller.
6. The switching control circuit of the high-low beam headlight according to claim 5, wherein a reverse connection unit is arranged between the LDO voltage stabilizing circuit and the voltage input terminal.
7. The high-low beam headlight switching control circuit according to claim 6, wherein the reverse connection unit comprises a first diode;
the first diode is connected in series between the fifth resistor and the voltage input terminal.
8. The switching control circuit of the high beam and low beam vehicle lamp according to claim 7, wherein the voltage stabilizer is a voltage stabilizing chip with a model number of TX3405, and the MCU controller is a two-way switching power supply chip with a model number of TPS 54386.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322501337.8U CN220935365U (en) | 2023-09-14 | 2023-09-14 | Far-near light car lamp switching control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322501337.8U CN220935365U (en) | 2023-09-14 | 2023-09-14 | Far-near light car lamp switching control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220935365U true CN220935365U (en) | 2024-05-10 |
Family
ID=90967732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322501337.8U Active CN220935365U (en) | 2023-09-14 | 2023-09-14 | Far-near light car lamp switching control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220935365U (en) |
-
2023
- 2023-09-14 CN CN202322501337.8U patent/CN220935365U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106060996B (en) | Lamp circuit | |
| CN101275726B (en) | Light emitting apparatus | |
| CN104206019A (en) | Lamp comprising high-efficiency light devices | |
| CN103650640B (en) | Circuit arrangement, lighting unit for a vehicle and method for driving semiconductor lighting elements | |
| CN106564424B (en) | Switching control circuit for daytime running light and position light of automobile | |
| CN106427767B (en) | A kind of lamp control device of the LED location lamp of display battery capacity | |
| CN110281839B (en) | Automobile high beam and low beam automatic control system based on Bluetooth technology | |
| CN204634104U (en) | A kind of three function LED drive circuits | |
| CN220935365U (en) | Far-near light car lamp switching control circuit | |
| CN111148316B (en) | Vehicle lamp and light emitting circuit | |
| CN215871919U (en) | Two-wire system PWM changes constant current module of adjusting luminance | |
| US20200120767A1 (en) | Vehicle lamp and lighting circuit | |
| CN206446514U (en) | A kind of LED location lamp for showing battery electric quantity | |
| CN110896574A (en) | OLED light source drive control circuit and OLED lamp | |
| KR102577150B1 (en) | OLED light source driving control circuit and OLED lamp | |
| CN207573660U (en) | The fault control circuit that a kind of more lamps for vehicle lamp link | |
| CN203078401U (en) | Intelligent car light control device based on CAN (Controller Area Network) bus | |
| CN110996459A (en) | Daytime running light drive circuit with dynamic effect | |
| CN201726566U (en) | Led lamp device | |
| CN219761370U (en) | Light control circuit suitable for two-stage dimming LED driving | |
| CN215474793U (en) | Vehicle and turn light control device thereof | |
| CN212231777U (en) | Graded dimming control circuit with memory and graded dimming lighting circuit | |
| CN220985894U (en) | Signal lamp control system for multiple loads | |
| CN220776119U (en) | Control circuit for realizing limp home of car lamp controller | |
| CN104270873A (en) | LED driver, control method and control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |