Color high-pixel automobile headlight control system based on microLED

Abstract

The invention provides a color high-pixel automobile headlight control system based on a microLED, an HD controller module is connected with an HDRGB lamp module, the HD controller module is used for controlling the HDRGB lamp module, the HD controller module and the HDRGB lamp module comprise the microLED, a three-phase brushless motor, a color wheel, an ASIC controller and a microLED signal driving receiving module, the color wheel is arranged on the side edge of the microLED, the three-phase brushless motor is arranged on the side edge of the microLED, and the ASIC controller is arranged on the side edge of the microLED. The HD controller module is respectively connected with the microLED, the ASIC controller, the three-phase brushless motor and the microLED signal driving and receiving module, the HD controller module controls the cooperation of the microLED and a color wheel to realize color projection, the rapid turn-off module is arranged, the microLED can be turned off almost without delay, and the microLED signal driving output module and the microLED signal driving and receiving module can be separately arranged, so that the cost is reduced, and the cost is reduced. And the layout flexibility is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lighting or signal devices, and more specifically, to a color high-pixel automobile headlight control system based on microLED. Background Art

[0002] With the development of current automotive lighting technology, a large number of automotive headlights with both lighting and projection functions have emerged, such as DLP projection headlights, micro LED headlights, etc. These headlights can only project white light and cannot complete color imaging. For example, when using a headlight to project a left turn sign, technically only a white arrow can be projected, but a yellow turn arrow cannot be projected. This does not comply with the regulations on turn signals and cannot clearly express the car's turning intention.

[0003] The existing technology uses a color wheel combined with headlights, which is mainly a consumer control solution based on DLP projection technology. There is no effective controller solution for the combination of micro LED and color wheel.

[0004] In view of this, the present invention proposes a color high-pixel automobile headlight control system based on microLED, which controls micro LED and a color wheel to achieve color imaging and can quickly shut down the LED working power supply. Summary of the invention

[0005] The present invention proposes a color high-pixel automobile headlight control system based on microLED, which controls micro LED and a color wheel to achieve color imaging and can quickly shut down the LED working power supply.

[0006] A color high-pixel automobile headlight control system based on microLED includes an HD controller module, an HD_RGB lamp module, and a fast shutdown module, characterized in that: the HD controller module is connected to the HD_RGB lamp module, the HD controller module is used to control the HD_RGB lamp module, a fast shutdown module is connected between the HD controller module and the HD_RGB lamp module, the fast shutdown module is used to quickly shut down the HD_RGB lamp module according to the HD controller module instruction, the HD_RGB lamp module includes microLED, a three-phase brushless motor, a color wheel, an ASIC controller, and a microLED signal drive receiving module, a color wheel is provided on the side of the microLED, the HD controller module is respectively connected to the microLED, the ASIC controller, the three-phase brushless motor, and the microLED signal drive receiving module, and the HD controller module is used to control the microLED to cooperate with the color wheel to achieve color projection.

[0007] In some embodiments, the HD controller module includes an MCU module, a first power supply module for HD_RGB lamp, a second power supply module for HD_RGB lamp, a microLED signal drive output module, and a motor drive module.

[0008] The MCU module is connected to the microLED through the HD_RGB lamp first power supply module. The HD_RGB lamp first power supply module is used to convert the vehicle's 14V power supply into a 4.5V constant voltage output required for the micro LED to work. 4.5V is the power supply.

[0009] The MCU module is connected to the ASIC controller through the HD_RGB lamp second power supply module. The HD_RGB lamp second power supply module is used to convert the vehicle's 12V power supply into the 5V voltage input required for the HD module to work. 5V is the logic power supply.

[0010] The MCU module is connected to the microLED signal drive receiving module through the microLED signal drive output module, the microLED signal drive output module is used to integrate the video signal and the control signal and output them to the microLED signal drive receiving module, the microLED signal drive receiving module is connected to the ASIC controller, the microLED signal drive receiving module is used to deserialize the integrated video signal and the control signal into independent video signals and independent control signals and output them to the ASIC controller respectively.

[0011] The MCU module is connected to the three-phase brushless motor through the motor drive module, and the three-phase brushless motor drive end is connected to the color wheel. The motor drive module is used to drive the three-phase brushless motor, thereby driving the color wheel to rotate at a constant speed.

[0012] The MCU module is connected to the first power supply module of the HD_RGB lamp through the fast shutdown module, so as to make the first power supply module of the HD_RGB lamp short-circuited and shut down quickly.

[0013] Furthermore, the microLED signal driving output module and the microLED signal driving receiving module are arranged on a separate board or on the same board. The more preferred arrangement is a separate board, so that the microLED signal driving output module and the microLED signal driving receiving module can be arranged separately, thereby improving the flexibility of the layout.

[0014] In some implementations, the fast shutdown module is an NMOS module.

[0015] In some embodiments, the control chip of the first power supply module of the HD_RGB lamp is TLD5501, the control chip of the second power supply module of the HD_RGB lamp is LMR36015Q1, the control chip of the microLED signal drive output module is Maxim's serial addition and deserialization chip 96705, the control chip of the microLED signal drive receiving module is Maxim's serial addition and deserialization chip 96706, and the control chip of the motor drive module is MCF8316CQ1.

[0016] Furthermore, the NMOS module includes an NMOS signal amplifying chip and an NMOS tube. The MCU module is connected to the NMOS signal amplifying chip and the NMOS tube. One end of the NMOS tube is connected to the NMOS signal amplifying chip, and the other end of the NMOS tube is connected to the first power supply module of the HD_RGB lamp.

[0017] Beneficial effects of the present invention: The present invention proposes a color high-pixel automobile headlight control system based on microLED, wherein an HD controller module is connected to an HD_RGB lamp module, and the HD controller module is used to control the HD_RGB lamp module. The HD controller module and the HD_RGB lamp module include microLED, a three-phase brushless motor, a color wheel, an ASIC controller, and a microLED signal drive receiving module. A color wheel is provided on the side of the microLED, and the HD controller module is respectively connected to the microLED, the ASIC controller, the three-phase brushless motor, and the microLED signal drive receiving module. The HD controller module controls the microLED to cooperate with the color wheel to realize color projection, and a fast shutdown module is set to shut down the microLED with almost no delay. At the same time, the microLED signal drive output module and the microLED signal drive receiving module can be set separately, thereby improving the flexibility of the layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a microLED-based color high-pixel automobile headlight control system of the present application.

[0019] Figure 2 This is a circuit diagram of the first power supply module of the HD_RGB lamp of a microLED-based color high-pixel automobile headlight control system of the present application.

[0020] Figure 3 This is a circuit diagram of a fast shutdown module of a microLED-based color high-pixel automobile headlight control system of the present application.

[0021] Figure 4This is a flow chart showing a red image frame of a microLED-based color high-pixel automobile headlight control system of the present application.

[0022] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0023] The following examples are described to assist the understanding of the present application, and the examples are not and should not be interpreted in any way as limiting the scope of protection of the present application.

[0024] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including within a single system or component).

[0025] At the same time, the connections between components or systems are not intended to be limited to direct connections, rather, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. In addition, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections. Embodiment 1:

[0026] like Figure 1 As shown, a color high-pixel automobile headlight control system based on microLED includes an HD controller module, an HD_RGB lamp module, and a fast shutdown module, wherein the HD controller module is connected to the HD_RGB lamp module, the HD controller module is used to control the HD_RGB lamp module, a fast shutdown module is connected between the HD controller module and the HD_RGB lamp module, the fast shutdown module is used to quickly shut down the HD_RGB lamp module according to the HD controller module instruction, the HD_RGB lamp module includes microLED, a three-phase brushless motor, a color wheel, an ASIC controller, and a microLED signal drive receiving module, a color wheel is provided on the side of the microLED, the HD controller module is respectively connected to the microLED, the ASIC controller, the three-phase brushless motor, and the microLED signal drive receiving module, and the HD controller module is used to control the microLED to cooperate with the color wheel to achieve color projection.

[0027] The HD controller module includes an MCU module, a first power supply module for HD_RGB lamp, a second power supply module for HD_RGB lamp, a microLED signal drive output module, and a motor drive module. The MCU module is connected to the microLED through the first power supply module for HD_RGB lamp. The first power supply module for HD_RGB lamp is used to convert the 14V power supply on the vehicle into a 4.5V constant voltage output required for the operation of the micro LED. 4.5V is the power supply. The control chip of the first power supply module for HD_RGB lamp is TLD5501. The MCU module is connected to the ASIC controller through the second power supply module for HD_RGB lamp. The second power supply module for HD_RGB lamp is used to convert the 12V power supply on the vehicle into a 5V voltage input required for the operation of the HD module. 5V is the logic power supply. The control chip of the second power supply module for HD_RGB lamp is LMR36015Q1. The MCU module is connected to the microLED signal drive receiving module through the microLED signal drive output module. The microLED signal drive output module is used to integrate the video signal and the control signal and output them to the microLED signal drive receiving module. The icroLED signal drive receiving module is connected to the ASIC controller, the microLED signal drive receiving module is used to deserialize the integrated video signal and control signal into independent video signals and independent control signals and output them to the ASIC controller respectively, the control chip of the microLED signal drive output module is Maxim's adding and deserializing chip 96705, the control chip of the microLED signal drive receiving module is Maxim's adding and deserializing chip 96706, and the control chip of the motor drive module is MCF8316CQ1; the MCU module is connected to the three-phase brushless motor through the motor drive module, the three-phase brushless motor drive end is connected to the color wheel, and the motor drive module is used to drive the three-phase brushless motor, thereby driving the color wheel to rotate at a constant speed. The MCU module is connected to the first power supply module of the HD_RGB lamp through the fast shutdown module, which is used to make the first power supply module of the HD_RGB lamp short-circuited and quickly shut down. The fast shutdown module is an NMOS module, and the NMOS module includes an NMOS signal amplification chip and an NMOS tube. The MCU module is connected to the NMOS signal amplification chip and the NMOS tube. One end of the NMOS tube is connected to the NMOS signal amplification chip, and the other end of the NMOS tube is connected to the first power supply module of the HD_RGB lamp.

[0028] like Figure 2As shown, it is a circuit diagram of the first power supply module of the HD_RGB lamp. The first power supply module of the HD_RGB lamp includes the first power supply module of the HD_RGB lamp. LED_POWER of the first power supply module of the HD_RGB lamp is connected to the microLED. The first power supply module of the HD_RGB lamp includes an input interface P1, a microcontroller power supply U2A, a capacitor C343-capacitor C373, and an inductor L10-inductor L30. The MOSI pin of the MCU chip is connected to the 11th pin of the input interface P1. The input interface P1 is connected to the microcontroller power supply U2A through the capacitor C343-capacitor C373. The capacitor C343-capacitor C373 smoothes the voltage and reduces power supply noise and ripple. Inductors L10-inductor L30 are provided between the capacitor C343-capacitor C373 and the microcontroller power supply U2A. The inductor L10-inductor L30 filters out high-frequency noise and further stabilizes the power supply output. The input interface P1 is connected to a diode D7. The diode D7 performs reverse protection to prevent the input power supply from being connected in reverse.

[0029] like Figure 3 The figure shows a circuit diagram of a fast shutdown module, which includes a fast shutdown module module, and the fast shutdown module module includes an operational amplifier U16 and an NMOS tube Q10. The MOSI pin of the MCU chip is connected to the 6th pin of the operational amplifier U16, the 2nd and 3rd pins of the operational amplifier U16 are connected to the G pole of the NMOS tube Q10, and the D pole of the NMOS tube Q10 is connected to the LED_POWER of the first power supply module of the HD_RGB lamp. The 2nd pin of the operational amplifier U16 is connected to a resistor R74, and the 3rd pin of the operational amplifier U16 is connected to a resistor R76. The input signal MOSI is detected by the operational amplifier U16, and the input level is compared with the reference voltage. The gain of the resistor R74 and the resistor R76 plays a role in determining the size of the output signal.

[0030] The working principle of the present invention is as follows: the chip specification MCU used uses NXP's dual-core MCU chip S32K324 as the control core of the control system, which is responsible for communicating with the vehicle computer and receiving external video signals, and driving various peripherals to work normally according to the built-in algorithm control; the first power supply module of the HD_RGB lamp uses Infineon's BUCK circuit control chip TLD5501 to convert the vehicle's 14V power supply into the 4.5V constant voltage output required for the micro LED to work (the high current voltage for LED work); the second power supply module of the HD_RGB lamp uses TI's BUCK chip LMR36015Q1 to convert the vehicle's 12V power supply into the 5V voltage input required for the HD module to work; the microLED signal drive output module and the microLED signal drive receiving module use Maxim's serial addition and deserialization chips 96705 and 96706 to transmit the video signal and control signal (Remote control) of the micro LED work; the motor drive module uses TI's MCF8316CQ1 chip to drive the three-phase brushless motor, driving the color wheel to rotate at a constant speed of 7200rpm.

[0031] Specifically:

[0032] First, the vehicle computer powers on the HD controller module, starts the HD controller module, and transmits a diagnostic control signal to the HD controller module through the vehicle body CAN network. After receiving the wake-up command, the HD controller controls the MCU module, the first power supply module of the HD_RGB lamp, the first power supply module of the HD_RGB lamp, the microLED signal drive output module, and the motor drive module to start supplying power to the HD_RGB headlight module and initialize the configuration to establish communication.

[0033] After the above initialization steps are completed, the car computer transmits the video signal (the video format is RGB888, a single pixel 24-bit video signal) to the HD controller module via Ethernet. The MCU module receives the video signal and processes it through the microLED signal driver output module. It converts a frame of RGB888 signal in the received video into three frames of video signals (8-bit video signal data) of R8, G8, and B8 respectively, and then pushes them to the microLED signal driver receiving module in turn. At the same time, the MCU module controls the motor driver chip to drive the three-phase brushless motor (BLDC) to drive the color wheel to rotate according to the RGB synchronization signal. When the microLED chip displays the R8 picture, the color wheel rotates to red. In the green and blue areas, when the color wheel rotates to the green and blue areas, the MCU module sends a shutdown signal (shunt signal) to the NMOS module according to the synchronization signal, so that the NMOS tube is turned on and the two ends of the microLED are short-circuited, and the microLED is turned off. When the color wheel rotates to the white area, the shutdown signal (shunt signal) disappears, and the microLED resumes normal display and continues to output the R8 picture. Therefore, in the display time of one frame, the rotation of the synchronized color wheel successfully displays a red picture and a white picture. This action continues in the next frame cycle, and a complete RGB image is displayed every 3 frames. The color wheel speed is 7200rps, that is, it rotates 120 times in one second. The image attribute rate of the micro LED is 120fps, and each frame of the image corresponds to one rotation of the color wheel. In each rotation, there are two color wheel areas R (G or B) and W, which are the normal display patterns. The other two color wheel areas bypass the NMOS short circuit to prevent the LED from displaying the picture, thereby realizing the time-sharing output of the RGB image.

[0034] When the color wheel rotates each time to correspond to different RGB images, different areas of the color wheel need to be brightened. For example, the red image corresponds to the R and W areas, and the green image corresponds to the G and W areas. The displayed areas are different, but the relative positions of RGBW on the color wheel remain unchanged. Therefore, the shunt signal (NMOS switching signal) corresponding to each rotation is different. In order to match different switching cycle signals to different cycles, such as Figure 4As shown in the figure, it is a flow chart of displaying a red image frame. Every time the MCU module sends a frame of picture to the micro LED, the MCU will send a frame synchronization signal SYNC. Each time a frame synchronization signal is sent, an interrupt is triggered, and the corresponding port is controlled to output the corresponding shutdown signal (shunt signal). At the same time, the synchronous output function of SPI communication is used to input the MOSI interface of SPI as the SHUNT signal. Because the communication rate of SPI follows the CLK signal, the SPI communication rate is configured as a low-speed signal of 480Hz. According to the clock frequency, the timing signal of 001101100101 (each 4 bits represents the switching state of the corresponding LED of one color of RGB at each time, with a total of 3x4=12bit) is transmitted outward in a loop. The signal is enhanced by the MOS driver chip (such as TI's UCC27511A-Q1) and input to the bypass NMOS module to realize the switching function of the microLED, ensuring that the LED is only lit when it needs to be displayed normally during one rotation of the color wheel.

[0035] Although the present application has disclosed multiple aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art, and several modifications and improvements may be made without departing from the concept of the present application, all of which belong to the protection scope of the present application. The multiple aspects and embodiments disclosed in the present application are only for illustration and are not intended to limit the present application. The actual protection scope of the present application shall be subject to the claims.

Claims

1. A color high-pixel automobile headlight control system based on microLED, including an HD controller module, an HD_RGB lamp module, and a fast shutdown module, characterized in that: The HD controller module is connected to the HD_RGB lamp module, and the HD controller module is used to control the HD_RGB lamp module. A fast shutdown module is connected between the HD controller module and the HD_RGB lamp module, and the fast shutdown module is used to quickly shut down the HD_RGB lamp module according to the HD controller module instruction. The HD_RGB lamp module includes microLED, a three-phase brushless motor, a color wheel, an ASIC controller, and a microLED signal drive receiving module. A color wheel is provided on the side of the microLED. The HD controller module is respectively connected to the microLED, the ASIC controller, the three-phase brushless motor, and the microLED signal drive receiving module. The HD controller module is used to control the microLED and the color wheel to cooperate to achieve color projection.

2. The microLED-based color high-pixel automobile headlight control system according to claim 1, characterized in that: The HD controller module includes an MCU module, a first power supply module for HD_RGB lamp, a second power supply module for HD_RGB lamp, a microLED signal drive output module, and a motor drive module. The MCU module is connected to the microLED through the first power supply module for HD_RGB lamp, the MCU module is connected to the ASIC controller through the second power supply module for HD_RGB lamp, the MCU module is connected to the microLED signal drive receiving module through the microLED signal drive output module, the microLED signal drive receiving module is connected to the ASIC controller, the MCU module is connected to the three-phase brushless motor through the motor drive module, the driving end of the three-phase brushless motor is connected to the color wheel, the motor drive module is used to drive the three-phase brushless motor, and then drive the color wheel to rotate at a constant speed, the MCU module is connected to the first power supply module for HD_RGB lamp through the fast shutdown module, and is used to make the first power supply module of HD_RGB lamp short-circuited and quickly shut down.

3. The microLED-based color high-pixel automobile headlight control system according to claim 1, characterized in that: The fast shutdown module is an NMOS module.

4. The microLED-based color high-pixel automobile headlight control system as described in claim 3, characterized in that: The NMOS module includes an NMOS signal amplifying chip and an NMOS tube. The MCU module is connected to the NMOS signal amplifying chip and the NMOS tube. One end of the NMOS tube is connected to the NMOS signal amplifying chip, and the other end of the NMOS tube is connected to the first power supply module of the HD_RGB lamp.

5. The microLED-based color high-pixel automobile headlight control system as claimed in claim 2, characterized in that: The first power supply module of the HD_RGB lamp is used to convert the 14V power supply on the vehicle into the 4.5V constant voltage output required for the operation of the micro LED, and 4.5V is the power supply; the second power supply module of the HD_RGB lamp is used to convert the 12V power supply on the vehicle into the 5V voltage input required for the operation of the HD module, and 5V is the logic power supply.

6. The microLED-based color high-pixel automobile headlight control system as claimed in claim 2, characterized in that: The control chip of the first power supply module of the HD_RGB lamp is TLD5501, and the control chip of the second power supply module of the HD_RGB lamp is LMR36015Q1.

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