Vehicle lamp control system, vehicle lamp and vehicle

Abstract

The utility model discloses a vehicle lamp control system, a vehicle lamp and a vehicle. The vehicle lamp control system comprises a power supply module, an LDO module, an MCU control module, an LED driving module, an LED series connection module and a detection regulation and control module. The power supply module is connected with the LED module, the power supply module is connected with the LED driving module, the LDO module is connected with the MCU control module, the MCU control module is connected with the LED driving module, the LED driving module is connected with the LED series module, the detection regulation and control module is connected with the MCU control module, and the detection regulation and control module is connected with the LED series module. And the detection regulation and control module is connected with the LED series module. According to the utility model, in a series connection mode, the LED lamp is not limited by a fault LED, other LEDs can be lightened, and the requirement of functional safety can be better met.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting technology, specifically to a vehicle lighting control system, a vehicle light, and a vehicle. Background Technology

[0002] With the development of vehicle technology, the functional safety requirements for automobiles are becoming increasingly stringent. From the entire vehicle to individual components, all components must meet functional safety standards. Consequently, OEMs are placing higher demands on the functionality of lighting fixtures. Currently, considering cost, headlights primarily use LED strings, where multiple LEDs are connected in series. If one LED fails, the entire LED string will not light up. However, from a safety perspective (especially during vehicle steering and braking), it is required that if one LED fails, the other working LEDs should still be able to illuminate. Utility Model Content

[0003] The technical problem to be solved by this invention is: in series mode, how to make other normal LEDs light up when one LED is damaged / faulty.

[0004] Therefore, this utility model provides a vehicle lighting control system, a vehicle lighting system, and a vehicle. By setting a detection and control module, it can detect faulty LEDs and enable other normal LEDs to be lit.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A vehicle lighting control system, comprising:

[0007] Power supply module, LDO module, MCU control module, LED driver module, LED series module, and detection and control module;

[0008] The power supply module is connected to the LED module, the power supply module is connected to the LED driver module, the LDO module is connected to the MCU control module, the MCU control module is connected to the LED driver module, the LED driver module is connected to the LED series module, the detection and control module is connected to the MCU control module, and the detection and control module is connected to the LED series module.

[0009] Furthermore, the detection and control module includes a detection unit and a control unit. The detection unit is connected to the LED series module and the MCU control module. The control unit is connected to the LED series module and the MCU control module.

[0010] Furthermore, the LED series module contains n LEDs connected in series; the control unit contains n MOS transistor groups, with one MOS transistor group corresponding to one LED.

[0011] Furthermore, the MOS transistor group includes: a PMOS transistor and an NMOS transistor. The second pin of the PMOS transistor is connected to the positive terminal of the LED, the third pin of the PMOS transistor is connected to the negative terminal of the LED, the first pin of the PMOS transistor is connected to the third pin of the NMOS transistor, the second pin of the NMOS transistor is grounded, and the first pin of the NMOS transistor is connected to the MCU control module.

[0012] Furthermore, the detection unit includes: n+1 detection resistor groups, each detection resistor group including two detection resistors connected in series, one end of the detection resistor group is connected to the positive terminal of the LED, the other end of the detection resistor group is grounded, and the MCU control module is connected to the connection point between the two detection resistors.

[0013] Furthermore, the MCU control module includes an MCU control chip, which contains multiple detection pins and multiple control pins. The detection pins are connected to the detection unit, and the control pins are connected to the control unit.

[0014] This utility model also provides a vehicle light, including: the aforementioned vehicle light control system.

[0015] This utility model also provides a vehicle, including: the aforementioned vehicle light.

[0016] The beneficial effects of this invention are that the vehicle lighting control system, vehicle lights, and vehicle of this invention, by setting up a detection and control module, can detect whether LEDs are faulty in real time and locate the faulty LED. Then, a replacement circuit is used to replace the faulty circuit, enabling the other normal LEDs to light up. This invention can achieve the lighting of other LEDs in series mode without being limited by the faulty LED, thus better meeting the requirements of functional safety. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the vehicle lighting control system of this utility model.

[0019] Figure 2 This is the circuit diagram of the control unit of this utility model.

[0020] Figure 3 This is a circuit diagram of the detection unit of this utility model.

[0021] Figure 4 This is the circuit diagram of the MCU control module of this utility model.

[0022] Figure 5 This is a circuit diagram of the LED driver module and the LED series module of this utility model.

[0023] Figure 6 This is the circuit diagram of the power supply module of this utility model.

[0024] Figure 7 This is the circuit diagram of the LDO module of this utility model. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Example 1

[0029] like Figures 1 to 7As shown, the vehicle lighting control system of this embodiment includes: a power supply module, an LDO module, an MCU control module, an LED driver module, an LED series module, and a detection and control module. The power supply module is connected to the LED module, the power supply module is connected to the LED driver module, the LDO module is connected to the MCU control module, the MCU control module is connected to the LED driver module, the LED driver module is connected to the LED series module, the detection and control module is connected to the MCU control module, and the detection and control module is connected to the LED series module.

[0030] The power supply module has an input voltage of 9V to 16V. This voltage is supplied to the LED driver module via an internal anti-reverse diode. The power supply module's input voltage then passes through an LDO (Low Dropout Linear Regulator) module, which outputs a 5V operating voltage to the MCU control module. The MCU control module sends control signals to the LED driver module, which then drives the LED series module to light up. During this process, the detection and control module works in conjunction with the MCU control module to detect any faulty LEDs in the LED series module in real time. If a faulty LED is detected, the voltage difference identifies which LED is faulty. A replacement circuit is then used to reconnect the series circuit, allowing the other working LEDs to light up.

[0031] In this embodiment, the detection and control module includes a detection unit and a control unit. The detection unit is connected to the LED series module and the MCU control module, respectively. The control unit is also connected to the LED series module and the MCU control module. The LED series module contains n LEDs connected in series. The control unit contains n MOSFET groups, with one MOSFET group corresponding to one LED. The MCU control module includes an MCU control chip, which has multiple detection pins and multiple control pins. The detection pins are connected to the detection unit, and the control pins are connected to the control unit. It should be noted that the detection unit detects the voltage values ​​across the LEDs and feeds them back to the MCU control chip. When a damaged / faulty LED is detected, the corresponding MOSFET group is turned on as a replacement circuit, allowing other normal LEDs to light up.

[0032] Specifically, the detection unit includes: n+1 detection resistor groups, each group consisting of two resistors connected in series. One end of each detection resistor group is connected to the positive terminal of the LED, and the other end is grounded. The MCU control module is connected to the connection point between the two detection resistors. The MOSFET group includes: one PMOS transistor and one NMOS transistor. Pin 2 of the PMOS transistor is connected to the positive terminal of the LED, pin 3 is connected to the negative terminal of the LED, pin 1 of the PMOS transistor is connected to pin 3 of the NMOS transistor, pin 2 of the NMOS transistor is grounded, and pin 1 of the NMOS transistor is connected to the MCU control module.

[0033] For example, taking n=3 as an example, LED1, LED2, and LED3 are connected in series. There are 4 sets of detection resistors: the first set includes resistors R7 and R13, the second set includes resistors R8 and R15, the third set includes resistors R9 and R16, and the fourth set includes resistors R10 and R17. There are 3 sets of MOSFETs: the first set includes PMOS transistor Q3 and NMOS transistor Q2, the second set includes PMOS transistor Q5 and NMOS transistor Q4, and the third set includes PMOS transistor Q7 and NMOS transistor Q6. One end of resistor R7 is connected to the positive terminal A of LED1, one end of resistor R8 is connected to the positive terminal B of LED2, one end of resistor R9 is connected to the positive terminal C of LED3, one end of resistor R10 is connected to the negative terminal D of LED3, pin 2 of PMOS transistor Q3 is connected to the positive terminal A of LED1, pin 2 of PMOS transistor Q5 is connected to the positive terminal B of LED2, and pin 2 of PMOS transistor Q7 is connected to the positive terminal C of LED3. The MCU control chip includes detection pins MCU_A, MCU_B, MCU_C, and MCU_D, and control pins MCU_KA, MCU_KB, and MCU_KC. For example, if the detection pin MCU_A is connected to point a between resistors R7 and R13, the acquired voltage value is... V A This represents the voltage value at point A. The same principle applies to the detection pins MCU_B, MCU_C, and MCU_D. Resistors are used for voltage division here to protect the MCU control chip from damage due to received voltage exceeding its operating voltage.

[0034] Working principle:

[0035] The power module's KL30 input is 9V~16V, and the KU1 chip in the LDO module outputs 5V to power the MCU control chip U1. The DC_IN pin of the MCU control chip U1 powers the constant voltage driver chip U2 of the LED driver module. The constant voltage driver chip U2 can drive LED1, LED2, and LED3 to light up or turn off.

[0036] The MCU control chip U1 uses the detection pin MCU_A to detect the voltage value V at point A in the LED series module. A The voltage value V at point B in the LED series module is detected by the MCU_B pin. B The voltage value V at point C in the LED series module is detected by the MCU_C pin. C The voltage value V at point D in the LED series module is detected by the MCU_D pin. D Under normal circumstances, V A -V B =V LED V B-V C =V LED V C -V D =V LED When LED1 malfunctions, V A -V B >V LED V B -V C =0, V C -V D =0; when LED2 malfunctions, V A -V B =V LED V B -V C >V LED V C -V D =0; When LED3 malfunctions, V A -V B =V LED V B -V C =V LED V C -V D >V LED Therefore, by judging the voltage across the LED and V... LED By observing the size relationship, it is possible to identify which LED is faulty.

[0037] After identifying which LED is faulty, the corresponding NMOS transistor is turned on via the MCU's control pins MCU_KA, MCU_KB, or MCU_KC. Once the NMOS transistor is turned on, the corresponding PMOS transistor's pins 2 and 3 are connected, and the circuit of the faulty LED is replaced by the PMOS transistor, allowing other normal LEDs to continue working.

[0038] Example 2

[0039] This embodiment provides a vehicle light, including the vehicle light control system of Embodiment 1. Vehicle light types include, but are not limited to, turn signals, brake lights, high beams, and low beams.

[0040] Example 3

[0041] This embodiment provides a vehicle, including the headlights of Embodiment 2.

[0042] In summary, the vehicle lighting control system, vehicle lights, and vehicle of this invention, by incorporating a detection and control module, can detect LED malfunctions in real time and locate the faulty LED. Then, a replacement circuit is used to replace the faulty circuit, enabling the other normal LEDs to illuminate. This invention, in series mode, is not limited by the faulty LED and can illuminate other LEDs, thus better meeting functional safety requirements.

[0043] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A vehicle lighting control system, characterized in that, include: Power supply module, LDO module, MCU control module, LED driver module, LED series module, and detection and control module; The power supply module is connected to the LED module, the power supply module is connected to the LED driver module, the LDO module is connected to the MCU control module, the MCU control module is connected to the LED driver module, the LED driver module is connected to the LED series module, the detection and control module is connected to the MCU control module, and the detection and control module is connected to the LED series module.

2. The vehicle lamp control system of claim 1, wherein The detection and control module includes a detection unit and a control unit. The detection unit is connected to the LED series module and the MCU control module. The control unit is connected to the LED series module and the MCU control module.

3. The vehicle lamp control system of claim 2, wherein The LED series module contains n LEDs connected in series; the control unit contains n MOS transistor groups, with one MOS transistor group corresponding to one LED.

4. The vehicle lamp control system of claim 3, wherein The MOS transistor group includes: one PMOS transistor and one NMOS transistor. The second pin of the PMOS transistor is connected to the positive terminal of the LED, the third pin of the PMOS transistor is connected to the negative terminal of the LED, the first pin of the PMOS transistor is connected to the third pin of the NMOS transistor, the second pin of the NMOS transistor is grounded, and the first pin of the NMOS transistor is connected to the MCU control module.

5. The vehicle lamp control system of claim 3, wherein The detection unit includes n+1 detection resistor groups, each detection resistor group including two detection resistors connected in series, one end of the detection resistor group is connected to the positive terminal of the LED, the other end of the detection resistor group is grounded, and the MCU control module is connected to the connection point between the two detection resistors.

6. The vehicle lamp control system of claim 2, wherein The MCU control module includes an MCU control chip, which contains multiple detection pins and multiple control pins. The detection pins are connected to the detection unit, and the control pins are connected to the control unit.

7. A vehicle lamp characterized by comprising: include: The vehicle lighting control system as described in any one of claims 1-6.

8. A vehicle characterized by comprising: include: The vehicle light as described in claim 7.

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