Automobile lamp LED light effect debugging system and debugging method thereof

Abstract

The present application relates to the technical field of automobile lamps, and particularly relates to a LED light effect debugging system for automobile lamps and a debugging method thereof. The debugging system comprises: a measured lamp; a programmable power supply connected with the measured lamp, which is used for providing a working voltage; an industrial computer connected with the measured lamp through a signal transmission device, wherein an upper computer control software is installed on the industrial computer, the upper computer control software sends a control signal, the control signal is transmitted to the measured lamp through the signal transmission device, the measured lamp executes the control signal, and LED light effect debugging is realized; and a display connected with the industrial computer. The LED light effect debugging system for automobile lamps can satisfy function verification of automobile lamps with the same chip in any combination, has strong compatibility, is convenient and flexible, has formula debugging logic control, greatly shortens a development cycle, and improves measurement efficiency.

Description

Technical Field

[0001] This invention relates to the field of automotive lighting technology, and in particular to an automotive lighting LED luminous efficacy adjustment system and its adjustment method. Background Technology

[0002] With the development of automotive lighting technology, especially the increasing demand for dynamic effects in automotive headlights and taillights, the integration of turn signals, position lights, daytime running lights, high brake lights, and grille lights to create a welcoming and homecoming effect has become a development trend for major OEMs.

[0003] To meet the diverse dynamic effects required by automotive lighting, the LED panels of automotive lights, including LED matrix chips, typically use UART communication to transmit control signals, controlling the LED beads to light up or turn off in combination to achieve different dynamic effects. However, considering the long-distance transmission across lighting fixtures and the complexity of control functions, the existing UART communication method can affect the transmission quality of control signals. To improve signal transmission quality, a UARTOverCAN communication chip is used to connect with the LED matrix chip, ensuring effective and rapid transmission of control signals through UARTOverCAN communication.

[0004] For automotive lights using the UartOverCAN communication method, in order to meet the interactive experience requirements of major OEMs, it is necessary to customize and develop a dedicated Lighting Drive Module (LDM) controller, and repeatedly develop the LDM controller program to verify the dynamic effect of the light rhythm in customer visual interaction, so as to realize the measurement of the dynamic effect of automotive lights. The measurement efficiency is low, and repeated development and verification are required, which greatly wastes the development cycle and work efficiency, and increases the project software development cost. Summary of the Invention

[0005] The technical problem this invention aims to solve is the low measurement efficiency and high implementation cost of existing technologies for measuring the dynamic effects of automotive headlights. This invention provides an LED luminous efficacy debugging system for automotive lighting, which can verify the functionality of any combination of the same chips, offering strong compatibility, convenience, and flexibility. Its formula-based debugging logic control significantly shortens the development cycle and improves measurement efficiency.

[0006] The technical solution adopted by this invention to solve its technical problem is: an LED luminous efficacy debugging system for automotive lamps, comprising: a lamp under test; a programmable power supply connected to the lamp under test, the programmable power supply being used to provide operating voltage; an industrial computer connected to the lamp under test via a signal transmission device, the industrial computer having host computer control software installed on it, the host computer control software sending control signals, the control signals being transmitted to the lamp under test via the signal transmission device, the lamp under test executing the control signals to achieve LED luminous efficacy debugging; and a display connected to the industrial computer.

[0007] Furthermore, specifically, the lamp under test includes a UartOverCAN communication interface; the signal transmission device includes a USB to UART module and a CAN to UART module, one end of the USB to UART module is connected to the industrial computer, the other end of the USB to UART module is connected to one end of the CAN to UART module, and the other end of the CAN to UART module is connected to the UartOverCAN communication interface.

[0008] Furthermore, specifically, the UartOverCAN communication interface is also connected to the programmable power supply.

[0009] Furthermore, specifically, the programmable power supply is also connected to the industrial computer, and the industrial computer controls the operating voltage output by the programmable power supply.

[0010] A debugging method for an automotive LED luminous efficacy debugging system as described above, the debugging method comprising:

[0011] Step 1: Run the host computer software on the industrial computer and select the lamp to be tested on the host computer software;

[0012] Step 2: Based on the selected lamp under test, send the first communication command through the software protocol to enter automatic debugging, detect whether the connection between the industrial computer and the lamp under test is successful, and identify the connection status and address of the lamp under test;

[0013] Step 3: Send a second communication command via software protocol to set the power configuration and current parameters of the lamp under test at the corresponding address;

[0014] Step 4: Send a third communication command via software protocol to achieve real-time transmission of synchronization signals and ensure that the tested lamp is in the wake-up state;

[0015] Step 5: Click the virtual function switch button on the host computer software. After clicking, the host computer software generates the corresponding switch control signal according to the corresponding virtual function button and transmits the switch control signal to the lamp under test.

[0016] The host computer software has a PWM duty cycle input box. The value of the PWM duty cycle is input into the PWM duty cycle input box, and a corresponding PWM control signal is generated. The PWM control signal is then transmitted to the lamp under test to achieve different brightness adjustments for the lamp under test. The PWM duty cycle for brightness adjustment is 10% to 100%.

[0017] Step 6: Input the formula process of the tested lamp into the host computer software. The formula process is the timing sequence for the tested lamp to achieve dynamic effects.

[0018] Step 7: Generate a dimming control signal based on the PWM duty cycle value input in Step 5 and the formula process in Step 6. The lamp under test receives and executes the dimming control signal to adjust the timing and brightness of the dynamic effect of the lamp under test.

[0019] Step 8: Repeat step 7 to re-adjust the tested lamp;

[0020] Step 9: Confirm and save the final timing of the dynamic effect of the tested lamp.

[0021] Furthermore, specifically, when measuring the lamp under test, the host computer software automatically sends a fault diagnosis and identification command for the lamp under test. The lamp under test receives the fault diagnosis and identification command and performs fault diagnosis. The host computer software waits for the fault diagnosis response information from the lamp under test, determines whether the lamp under test has open or short circuit faults or unreasonable power configuration and current parameter settings, and records it in a log file in real time.

[0022] Furthermore, specifically, the dynamic effects include flowing light effects and dynamic welcoming effects that occur when car doors open or close.

[0023] The beneficial effects of this invention are:

[0024] (1) The LED light effect debugging system provided by the present invention replaces the customized vehicle light controller debugging method, which can meet the functional verification of any combination of the same chip, and is highly compatible, convenient and flexible.

[0025] (2) Different types of lamps under test require customized development of corresponding vehicle lamp controllers. The LED light effect debugging system provided by this invention has a formula software configuration to realize the lighting, extinguishing or dynamic control of the lamps under test, simplifying the efficiency of early design verification, reducing project development costs, and improving measurement efficiency.

[0026] (3) The LED light effect debugging method provided by the present invention sets the address, PWM duty cycle and timing of the lamp under test in a formulaic way to meet any customized visual experience requirements. The formulaic process can be saved and easily ported to a customized vehicle light controller, which can reduce the development cycle of the vehicle light controller. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 This is a schematic diagram of the system structure of Embodiment 1 of the present invention.

[0029] Figure 2 This is a schematic diagram of the method flow of Embodiment 2 of the present invention.

[0030] In the diagram: 1. The lamp under test; 2. Programmable power supply; 3. Industrial computer; 4. Monitor; 5. Signal transmission equipment; 11. UARTOverCAN communication interface; 51. USB to UART module; 52. CAN to UART module. Detailed Implementation

[0031] 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 invention, and therefore only show the components relevant to the invention.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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 the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0034] Example 1

[0035] like Figure 1 The diagram illustrates an embodiment of the present invention: an LED luminous efficacy debugging system for automotive lighting, comprising: a lamp under test 1; a programmable power supply 2 connected to the lamp under test 1, the programmable power supply 2 providing operating voltage; an industrial computer 3 connected to the lamp under test 1 via a signal transmission device 5, the industrial computer 3 having host computer control software installed on it, the host computer control software sending control signals, which are transmitted to the lamp under test 1 via the signal transmission device 5, the lamp under test 1 executing the control signals to achieve LED luminous efficacy debugging; and a display 4 connected to the industrial computer 3.

[0036] In this embodiment, the lamp under test 1 includes a UartOverCAN communication interface 11; the signal transmission device 5 includes a USB-to-UART module 51 and a CAN-to-UART module 52. One end of the USB-to-UART module 51 is connected to the industrial computer 3, and the other end of the USB-to-UART module 51 is connected to one end of the CAN-to-UART module 52. The other end of the CAN-to-UART module 52 is connected to the UartOverCAN communication interface 11, enabling UartOverCAN communication control between the industrial computer 3 and the lamp under test 1. The UartOverCAN communication interface 11 is also connected to the programmable power supply 2, providing operating voltage to the lamp under test 1 through the UartOverCAN communication interface 11.

[0037] In this embodiment, the programmable power supply 2 is also connected to an industrial computer 3, which controls the operating voltage output of the programmable power supply 2. It should be noted that the industrial computer 3, as the core controller of the debugging system, can control and adjust the 9V-15V operating voltage of the automotive lighting fixtures. The programmable power supply 2 and the industrial computer 3 are connected via an RS232 bus, and the industrial computer 3 controls the operating voltage output of the programmable power supply 2 according to the type of lighting fixture 1 under test.

[0038] In summary, the LED luminous efficacy debugging system provided by this invention replaces the customized vehicle light controller debugging method, and can meet the functional verification of lamps with any combination of the same chip. It has strong compatibility, convenience and flexibility. Different types of lamps 1 under test require customized development of corresponding vehicle light controllers. The LED luminous efficacy debugging system provided by this invention has a formula-based software configuration, which realizes the lighting, extinguishing or dynamic control of the lamps 1 under test, simplifies the efficiency of early design verification, reduces project development costs and has high measurement efficiency.

[0039] Example 2

[0040] Based on the same inventive concept as the automotive LED luminous efficacy debugging system in Embodiment 1 above, this application also provides an automotive LED luminous efficacy debugging method. The method uses the aforementioned LED luminous efficacy debugging system. After the system is powered on and initialized, the user manually selects the configuration program for the lamp 1 under test, such as a headlight or taillight item. After successful loading, the system automatically connects to the programmable power supply 2 and opens the communication serial port according to pre-set parameters, waiting to enter the debugging process. The debugging method specifically includes the following steps:

[0041] Step 1: The industrial computer 3 runs the host computer software, and selects the lamp to be tested 1 on the host computer software; such as: the left lamp of the combination lamp behind the first taillight, the left lamp of the combination lamp behind the second taillight, the right lamp of the combination lamp behind the first taillight, the right lamp of the combination lamp behind the second taillight, etc.

[0042] Step 2: Based on the selected lamp under test 1, send the first communication command via software protocol to enter automatic debugging, check whether the connection between the industrial computer 3 and the lamp under test 1 is successful, and identify the connection status and address of the lamp under test 1; specifically, different types of automotive lamps have different corresponding hardware channels and configurations, resulting in different dynamic effects. Switch the corresponding debugging program according to the selected lamp under test 1, and send the first communication command to establish a communication connection with the lamp under test 1. If the communication connection of the lamp under test 1 is successful, the lamp under test 1 will automatically reply with a connection success response signal, and the host computer software of the selected lamp under test 1 can automatically identify the address of the lamp under test 1.

[0043] Step 3: Send a second communication command via software protocol. The second communication command is used to set the power configuration and current parameters of the lamp under test 1 at the corresponding address. The power configuration setting is used to initialize the lamp under test 1, and the current parameter setting is used to control different duty cycles of the lamp under test 1.

[0044] Step 4: Send a third communication command via software protocol to achieve real-time transmission of synchronization signals, ensuring the tested lamp is in the awake state. The tested lamp 1 needs to maintain real-time communication with the industrial computer 3. To avoid communication timeouts, the tested lamp 1 will automatically enter sleep mode via the third communication command. The third communication command sending cycle is 50ms.

[0045] Step 5: Click the virtual function switch button on the host computer software. After clicking, the host computer software generates the corresponding switch control signal according to the corresponding virtual function button and transmits the switch control signal to the lamp under test 1. Specifically, the virtual function switch button includes, but is not limited to, position light switch, turn signal switch, brake light switch, rear fog light switch, license plate light switch, daytime running light switch, low beam switch and high beam switch.

[0046] The host computer software has a PWM duty cycle input box. The value of the PWM duty cycle is input into the PWM duty cycle input box, and a corresponding PWM control signal is generated and transmitted to the lamp under test 1 to realize different brightness adjustments of the lamp under test 1. The PWM duty cycle for brightness adjustment is 10% to 100%. When the value of the PWM duty cycle is 0, the lamp under test 1 is turned off.

[0047] Step Six: As needed, verify the timing of the dynamic effect of the tested lamp 1 and input the formulation process of the tested lamp 1; where dynamic effects include flowing light effects and dynamic welcoming effects formed when car doors open or close. The formulation process is the timing of the tested lamp 1 to achieve the dynamic effects. Within this timing, the tested lamp 1 can meet the optical regulatory requirements, the brightness of the tested lamp 1 can keep the human eye comfortable, and the dynamic effect of the tested lamp 1 is gorgeous.

[0048] Step 7: Generate a dimming control signal based on the PWM duty cycle value input in Step 5 and the formula process in Step 6. The lamp under test 1 receives and executes the dimming control signal to adjust the timing and brightness of the dynamic effect.

[0049] Step 8: Repeat step 7 to adjust the lamp 1 under test again.

[0050] In this embodiment, when the LED light effect of the tested lamp is adjusted, the staff observes the current dynamic effect of the light through subjective evaluation. When the dynamic effect of the tested lamp 1 is basically consistent with the previous input animation effect of the whole vehicle, and the subjective comfort is also satisfied, the adjustment is stopped.

[0051] Step 9: Confirm and save the timing sequence of the dynamic effect of the tested lamp 1, and use this timing sequence as the timing sequence of the vehicle lighting controller to meet any customized visual experience requirements. The measurement timing sequence can be directly transplanted to the customized vehicle lighting controller, reducing the development cycle of the vehicle lighting controller.

[0052] In this embodiment, the lighting or extinguishing of the tested lamp is measured by using a virtual function switch button; the power of the tested lamp is controlled by inputting the PWM duty cycle value in the PWM duty cycle input box, and the LED brightness of the tested lamp is adjusted to realize the reuse of LED functions, such as switching between low-brightness position lights and high-brightness daytime running lights, or switching between low-brightness position lights and high-brightness brake lights; by inputting a formulaic process, the combination of multiple OUT ports of a single chip in the tested lamp is controlled to switch quickly and control the timing logic, realizing the dynamic transition of the tested lamp from single LED to two LEDs, three LEDs, and then to full brightness in a continuous flow control; by combining the PWM duty cycle and the formulaic process, the combination of multiple OUT output ports of multiple matrix chips is controlled to realize the dynamic welcome control of the tested lamp.

[0053] In this embodiment, when measuring the lamp under test 1, the host computer software automatically sends a fault diagnosis and identification command to the lamp under test 1. The lamp under test 1 receives the fault diagnosis and identification command and performs fault diagnosis. The host computer software waits for the fault diagnosis response information from the lamp under test 1, determines whether the lamp under test 1 has an open or short circuit fault or an unreasonable power configuration and current parameter setting fault, and records it in the log file in real time, so that the staff can easily check the cause of the fault and the fault detection is clearly visible.

[0054] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A system for adjusting the luminous efficacy of automotive lighting LEDs, characterized in that, include: The tested lighting fixture (1); A programmable power supply (2) is connected to the lamp under test (1), and the programmable power supply (2) is used to provide the working voltage; An industrial computer (3) is connected to the lamp under test (1) via a signal transmission device (5). The industrial computer (3) is equipped with host computer control software. The host computer control software sends control signals, which are transmitted to the lamp under test (1) via the signal transmission device (5). The lamp under test (1) executes the control signals to achieve LED light effect debugging. and a display (4), which is connected to the industrial computer (3); The tested lamp (1) includes a UartOverCAN communication interface (11); The signal transmission device (5) includes: a USB to UART module (51) and a CAN to UART module (52). One end of the USB to UART module (51) is connected to the industrial computer (3), and the other end of the USB to UART module (51) is connected to one end of the CAN to UART module (52). The other end of the CAN to UART module (52) is connected to the UartOverCAN communication interface (11). Debugging methods include: Step 1: The industrial computer (3) runs the host computer software and selects the lamp to be tested (1) on the host computer software. Step 2: Based on the selected lamp under test (1), send the first communication command through the software protocol to enter automatic debugging, detect whether the connection between the industrial computer (3) and the lamp under test (1) is successful, and identify the connection status and address of the lamp under test (1); Step 3: Send a second communication command via software protocol to set the power configuration and current parameters of the lamp under test (1) at the corresponding address; Step 4: Send a third communication command through the software protocol to realize the real-time transmission of the synchronization signal and ensure that the tested lamp (1) is in the wake-up state; Step 5: Click the virtual function switch button on the host computer software. After clicking, the host computer software generates the corresponding switch control signal according to the corresponding virtual function button and transmits the switch control signal to the lamp under test (1). The host computer software has a PWM duty cycle input box. The value of the PWM duty cycle is input into the PWM duty cycle input box, and a corresponding PWM control signal is generated. The PWM control signal is then transmitted to the lamp under test (1) to achieve different brightness adjustments for the lamp under test (1). The PWM duty cycle for brightness adjustment is 10%~100%. Step 6: Input the formula process of the lamp under test (1) into the host computer software. The formula process is the timing sequence for the lamp under test (1) to achieve dynamic effects. Step 7: Generate a dimming control signal based on the PWM duty cycle value input in Step 5 and the formula process in Step 6. The lamp under test (1) receives and executes the dimming control signal to adjust the timing and brightness of the dynamic effect of the lamp under test (1). Step 8: Repeat step 7 to re-adjust the tested lamp (1); Step 9: Confirm and save the final timing of the dynamic effect of the tested lamp (1).

2. The automotive lighting LED luminous efficacy adjustment system as described in claim 1, characterized in that, The UartOverCAN communication interface (11) is also connected to the programmable power supply (2).

3. The automotive LED luminous efficacy adjustment system as described in claim 1, characterized in that, The programmable power supply (2) is also connected to the industrial computer (3), which controls the operating voltage output by the programmable power supply (2).

4. The automotive lighting LED luminous efficacy adjustment system as described in claim 1, characterized in that, When measuring the lamp under test (1), the host computer software automatically sends the fault diagnosis identification instruction of the lamp under test (1). The lamp under test (1) obtains the fault diagnosis identification instruction and performs fault diagnosis. The host computer software waits for the fault diagnosis reply information of the lamp under test (1), determines whether the lamp under test (1) has an open or short circuit fault and an unreasonable power supply configuration and current parameter setting fault, and records it in the record file in real time.

5. The automotive lighting LED luminous efficacy adjustment system as described in claim 1, characterized in that, The dynamic effects include flowing light effects and dynamic welcoming effects when car doors open or close.

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