Search

CN-122002676-A - Control module, lighting device and motor vehicle

CN122002676ACN 122002676 ACN122002676 ACN 122002676ACN-122002676-A

Abstract

The application provides a control module which is configured to control actions of a light source module according to external control instructions, wherein each light source group comprises a first light source and a second light source, the control module comprises a signal transmission circuit, a control circuit, a signal conversion circuit and a light source switching circuit, wherein the signal transmission circuit is used for receiving the external control instructions and converting the external control instructions into first control signals, the control circuit comprises at least one driving chip, the driving chip is used for receiving the first control signals and outputting multiplex driving signals and second control signals according to the first control signals, the driving chip is electrically connected with a first end of the first light source and a first end of the second light source, the driving chip is used for respectively controlling actions of the corresponding light source group according to the multiplex driving signals, the signal conversion circuit is electrically connected with the driving chip and is used for receiving the second control signals and outputting third control signals according to the second control signals, and the light source switching circuit is electrically connected with a second end of the first light source and a second end of the second light source and is used for receiving the third control signals according to the third control signals.

Inventors

  • LI HAOBIN
  • Xu Yingrou
  • YE MINGZHOU
  • GUO JINJIN

Assignees

  • 市光法雷奥（佛山）汽车照明系统有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (15)

  1. 1. A control module (100), characterized in that the control module is configured to control the actions of a light source module (300) according to external control instructions (S01), the light source module comprising a plurality of light source groups, the light sources in each of the light source groups comprising a first light source and a second light source, the control module comprising: a signal transmission circuit (10) configured to receive the external control instruction (S01) and convert the external control instruction into a first control signal (S1); -a control circuit (20) comprising at least one driving chip (21) configured to receive the first control signal and to output a multiplex driving signal (Sd) and a second control signal (S2) according to the first control signal, wherein the driving chip is configured to electrically connect a first end of the first light source and a first end of the second light source, the driving chip being configured to control the actions of the respective light source groups of the plurality of light source groups according to the multiplex driving signal, respectively; a signal conversion circuit (30) electrically connected to the driving chip, the signal conversion circuit being configured to receive the second control signal and output a third control signal (S3) in accordance with the second control signal, and A light source switching circuit (40) electrically connecting the signal conversion circuit and the second end of the first light source, the second end of the second light source, the light source switching circuit being configured to receive the third control signal and to set one of the second end of the first light source and the second end of the second light source to a reference level in accordance with the third control signal.
  2. 2. The control module of claim 1, wherein the external control command (S01) is a CAN signal, a LIN signal, or an SPI signal, and the first control signal (S1) is a TXRX serial signal; the signal transmission circuit is configured to convert the CAN signal, LIN signal, or SPI signal to the TXRX serial signal.
  3. 3. The control module of claim 1, wherein the first control signal (S1) is a TXRX serial signal; the driving chip is configured to receive the TXRX serial port signal and output the second control signal according to the TXRX serial port signal (S2); the second control signal (S2) is a current signal; The current signal is a first reference current or 0.
  4. 4. The control module according to claim 1, wherein the second control signal (S2) is a current signal and the third control signal (S3) is a voltage signal; the signal conversion circuit (30) is configured to output the voltage signal in accordance with the current signal.
  5. 5. The control module of claim 4, wherein the voltage signal is one of a high level and a low level when the current signal is equal to a first reference current; when the current signal is 0, the voltage signal is the other of high level and low level.
  6. 6. The control module of claim 4, wherein the signal conversion circuit (30) comprises an input, an output, a ground, a first transistor (Q4), a first resistor (R19), a second resistor (R20), a third resistor (R43), and a fourth resistor (R13); The collector electrode of the first triode is electrically connected with the input end, the first resistor is electrically connected between the input end and the base electrode of the first triode, the second resistor is electrically connected between the emitter electrode of the first triode and the ground end, the third resistor is electrically connected between the emitter electrode of the first triode and the output end, and the fourth resistor is electrically connected between the output end and the ground end.
  7. 7. The control module of any one of claims 1 to 6, wherein the light source switching circuit is configured to set the other of the second end of the first light source and the second end of the second light source to be non-conductive according to the third control signal, the light source of which the second end is set to be non-conductive being configured to be turned off; The light source of which the second end is set to a reference level of the first light source and the second light source is configured to be turned on or off according to the corresponding driving signal (Sd).
  8. 8. The control module of claim 7, wherein the light source switching circuit (40) comprises a first drive circuit (41), a second drive circuit (42), a drive input, a ground, a first drive end, and a second drive end; -the drive input is configured to receive the third control signal (S3); The first driving circuit is configured to set the first driving end to one of a reference level, which is one of a low level and a high level, and non-conduction according to the third control signal; the second driving circuit is configured to set the second driving end to the other one of the reference level and the non-conduction according to the third control signal.
  9. 9. The control module of claim 8, wherein the first drive circuit comprises a first MOS transistor (Q1) and a fifth resistor (R35); The grid electrode of the first MOS tube is electrically connected with the driving input end, the fifth resistor is electrically connected between the grid electrode and the source electrode of the first MOS tube, the source electrode of the first MOS tube is electrically connected with the ground end, and the drain electrode of the first MOS tube is electrically connected with the first driving end. The second driving circuit comprises a second MOS tube (Q2), a sixth resistor (R36) and a negation circuit (421); The grid electrode of the second MOS tube is electrically connected with the driving input end through the inverting circuit, the sixth resistor is electrically connected between the grid electrode and the source electrode of the second MOS tube, the source electrode of the second MOS tube is electrically connected with the ground end, and the drain electrode of the second MOS tube is electrically connected with the second driving end; wherein the inverting circuit (421) comprises a second triode (Q3), a seventh resistor (R37), an eighth resistor (R38) and a ninth resistor (R39); The base electrode of the second triode is electrically connected with the driving input end through the ninth resistor, the seventh resistor is electrically connected between the base electrode of the second triode and the ground end, the emitting electrode of the second triode is electrically connected with the ground end, and the collecting electrode of the second triode is electrically connected with a reference power supply through the eighth resistor.
  10. 10. The control module of claim 1, wherein the first light source is for daytime running light functions and the second light source is for turn light functions; The first light source is configured to form a pattern or animation according to the corresponding driving signal, and the second light source is configured to form a pattern or animation according to the corresponding driving signal.
  11. 11. The control module of any one of claims 1 to 6, wherein a first end of each light source is a positive pole and a second end is a negative pole, the reference level being a low level; Or the first end of each light source is a negative electrode, the second end is a positive electrode, and the reference level is a high level.
  12. 12. The control module according to claim 1, wherein the control module comprises an anti-reverse connection line (32) electrically connecting the driver chip, the anti-reverse connection circuit being configured to control the driver chip (21) in dependence of an external hard-wire wake-up signal (S02).
  13. 13. The control module according to claim 1, wherein the light source module comprises a detection circuit (400) configured to detect a parameter of the light source module and to output a parameter signal (St); The driving chip (21) is electrically connected to the detection circuit and configured to receive the detection signal (St).
  14. 14. A light emitting device, characterized in that the light emitting device comprises a control module (100) according to any one of claims 1-13 and a light source module (300), the control module being configured to control the actions of the corresponding light sources in the light source module according to control instructions of an external controller (200).
  15. 15. A motor vehicle, characterized in that it comprises a control module according to any one of claims 1-13, or a lighting device according to claim 14.

Description

Control module, lighting device and motor vehicle Technical Field The present application relates to the field of lighting technology, and more particularly to a control module, a lighting device and a motor vehicle. Background In the field of lighting technology, a variety of lighting or signaling devices are known for providing lighting or signaling light. For example, lamps are used in motor vehicles to provide lighting or signaling functions, to ensure safe driving, or to provide decorative functions. As the demands for individualization of the vehicle lamp are increasing, it is becoming a trend to form a vehicle lamp animation using a plurality of light sources, which requires a control module of the vehicle lamp to have a plurality of I0 ports to drive the respective light sources. However, the number of I0 ports of the main control chip in the control module is usually limited, and cannot meet the control of a large number of light sources, and if a large number of main control chips are arranged to control a large number of light sources, the production cost of the car lamp can be obviously increased. Therefore, how to propose a new control module that can realize the on-off control of a large number of light sources with as few main control chips as possible in a low-cost manner. Disclosure of Invention It is an object of the present application to overcome at least one of the problems and disadvantages of the prior art. A first aspect of the present application provides a control module configured to control an action of a light source module according to an external control instruction, the light source module including a plurality of light source groups, light sources in each of the light source groups including a first light source and a second light source, the control module including: A signal transmission circuit configured to receive the external control instruction and convert the external control instruction into a first control signal; The control circuit comprises at least one driving chip, the driving chip is configured to receive the first control signal and output a multi-path driving signal and a second control signal according to the first control signal, the driving chip is configured to be electrically connected with the first end of the first light source and the first end of the second light source, and the driving chip is configured to control actions of corresponding light source groups in the plurality of light source groups respectively according to the multi-path driving signal; A signal conversion circuit electrically connected to the driving chip, the signal conversion circuit configured to receive the second control signal and output a third control signal according to the second control signal, and And a light source switching circuit electrically connected to the signal conversion circuit and the second end of the first light source and the second end of the second light source, the light source switching circuit being configured to receive the third control signal and set one of the second end of the first light source and the second end of the second light source as a reference level according to the third control signal. In some embodiments, the external control instruction is a CAN signal, a LIN signal, or an SPI signal, and the first control signal is a TXRX serial signal; the signal transmission circuit is configured to convert the CAN signal, LIN signal, or SPI signal to the TXRX serial signal. In some embodiments, the first control signal is a TXRX serial signal; The driving chip is configured to receive the TXRX serial port signal and output the second control signal according to the TXRX serial port signal; The second control signal is a current signal; The current signal is a first reference current or 0. In some embodiments, the second control signal is a current signal and the third control signal is a voltage signal; the signal conversion circuit is configured to output the voltage signal in accordance with the current signal. In some embodiments, the voltage signal is one of a high level and a low level when the current signal is equal to a first reference current; when the current signal is 0, the voltage signal is the other of high level and low level. In some embodiments, the signal conversion circuit includes an input terminal, an output terminal, a ground terminal, a first triode, a first resistor, a second resistor, a third resistor, and a fourth resistor; The collector electrode of the first triode is electrically connected with the input end, the first resistor is electrically connected between the input end and the base electrode of the first triode, the second resistor is electrically connected between the emitter electrode of the first triode and the ground end, the third resistor is electrically connected between the emitter electrode of the first triode and the output end, and the fourth resistor is electrically connected between the outpu