Automobile lamp display interaction system based on AMOLED technology, automobile lamp and automobile

Abstract

The invention provides an AMOLED technology-based vehicle lamp display interaction system, a vehicle lamp and a vehicle. The system comprises an AMOLED panel module, an AMOLED power supply module, an FPGA power supply module, a Flash memory module, an FPGA module, an MCU module, an SBC module and a power supply input module. Compared with the prior art, the AMOLED panel has the capability of easily realizing ten thousands of pixels or even higher pixels, and the magnitude order jump is realized. The AMOLED panel can display sharper characters, complex graphs and smooth animations, and the readability and the identification degree of information in various environments are improved. And meanwhile, the AMOLED panel is integrated with a thin film transistor to drive and control each pixel, so that the integration level is high, and an additional LED driving chip does not need to be added to the display panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle lamps, in particular to a vehicle lamp display interaction system based on AMOLED technology, a vehicle lamp and a vehicle. BACKGROUND

[0002] With the rapid development of intelligent and networked technologies for vehicles, vehicle lamps, as an important visual interaction interface for vehicles, have evolved from traditional lighting and signal indication to an information interaction carrier for vehicles to external environments (V2X).

[0003] The current mainstream intelligent interaction tail lamp technology (for example, an array type intelligent interaction screen (ISD) based on LEDs) faces some significant bottlenecks and has the following problems: 1. The number of pixels is limited, and the information carrying capacity is insufficient; if simple symbol interaction is to be realized, more than 100 LEDs are required, and if some complex display effects such as Chinese character display are to be realized, thousands of LEDs are often required, which greatly increases the cost of LEDs.

[0004] 2. Low pixels cannot support delicate and smooth dynamic interaction effects, which limits the possibility of higher level and real-time interaction with the surrounding environment.

[0005] 3. The number of driving chips is large, and the cost is high; since LEDs are current-driven devices, a constant current channel is required for each independent LED pixel, and the increase in the number of LEDs also increases the number of driving chips, which significantly increases the cost.

[0006] In Chinese patent document CN119116829A, a vehicle tail lamp control system based on the Internet of Things is disclosed. The system uses a microprocessor such as an STM32, combines a ranging sensor and a vehicle speed sensor, and receives and processes environmental signals in real time to determine the external conditions of the vehicle and its own situation. The core of the system includes a power module, a microprocessor, an OLED dot matrix display screen, a driving circuit module, and an NB-IOT module. The microprocessor controls the components, adjusts the lighting and display state of the tail lamp according to the sensor feedback information. However, the OLED display screen used in this scheme has a small number of pixels and can only display symbol image effects. Moreover, the pixels of the OLED display screen are controlled by an external power supply, and the OLED itself only has a light-emitting source LED, which is a passive OLED. The driving is independent of the display screen, which requires additional driving chips, increasing the hardware cost and installation space requirements. SUMMARY

[0007] In view of the defects in the prior art, the present application aims to provide a vehicle lamp display interaction system based on AMOLED technology, a vehicle lamp and a vehicle.

[0008] The application provides a vehicle lamp display interaction system based on an AMOLED technology, which comprises an AMOLED panel module, an AMOLED power supply module, an FPGA power supply module, a Flash memory module, an FPGA module, an MCU module, an SBC module and a power input module. The power input module receives an external power supply and outputs an electric signal to the AMOLED power supply module and the SBC module. The SBC module establishes a CAN communication connection with the outside, provides power supply to the FPGA power supply module and the MCU module respectively, and performs signal interaction with the MCU module. The FPGA power supply module provides core power supply and display power supply for the FPGA module. The MCU module performs signal interaction with the FPGA module, and is electrically connected with the AMOLED panel module and used for acquiring a temperature state signal. The FPGA module controls a power supply timing signal of the AMOLED power supply module, so that the power supply module supplies power to the AMOLED panel module. The FPGA module is electrically connected with the Flash memory module and used for image data interaction to be displayed, and is electrically connected with the AMOLED panel module and used for controlling the AMOLED panel module to emit light based on the image data.

[0009] Preferably, the AMOLED power supply module provides VDD_3V3 / 1V8, AVDD, ELVDD and ELVSS power supply for the AMOLED panel module. The VDD_3V3 is used for supplying power to an analog circuit part of the AMOLED. The VDD_1V8 is used for supplying power to a digital circuit part of the AMOLED. The AVDD provides working voltage for a display driving chip to control pixel switch timing. The ELVDD provides anode bias voltage for AMOLED pixels to control luminance. The ELVSS is used for adjusting cathode voltage to optimize contrast ratio and eliminate residual image. The AMOLED power supply module further outputs an AMOLED reset signal RESET to the AMOLED panel module.

[0010] Preferably, the FPGA power supply module provides core power supply VCC_Core and VCC_MIPI for the FPGA module. The VCC_MIPI is used for providing D-PHY power supply voltage for the FPGA module.

[0011] Preferably, the flash memory module is a non-volatile flash memory pre-storing static images or dynamic video data to be displayed, and the static images or dynamic video data are pre-converted into binary codes in units of pixels.

[0012] Preferably, the FPGA module has a protocol conversion function, a parallel panel control function, a timing control function and a power supply state monitoring function. The protocol conversion function includes converting data pre-stored in the flash memory module into a graphic data stream required by the AMOLED panel module, and the graphic data stream technology includes MIPI DSI and QSPI protocol technology. The parallel panel control function includes synchronously outputting instruction streams to multiple AMOLED panels. The timing control function includes generating an enable signal of an AMOLED power supply to control the AMOLED power supply to perform power-on and power-off operations on the AMOLED panel in a correct timing. The power supply state monitoring function includes monitoring whether the power output of the AMOLED power supply module is normal, and feeding back the monitoring result to the MCU module.

[0013] Preferably, the MCU module receives and analyzes vehicle V2X interaction instructions, the receiving mode includes CAN bus communication mode, and after analysis, the FPGA module is transmitted through on-board communication mode, and the transmission mode includes SPI communication. The MCU module monitors the working state of the FPGA module, and the monitoring mode includes monitoring through a GPIO fault flag, and a high level lasting for greater than or equal to 100 ms is determined as an effective fault. The MCU module acquires the current temperature of the AMOLED through back-reading of the resistance value of a thermistor of the AMOLED module, and executes a thermal management strategy. The MCU module executes corresponding software strategies when a system fault occurs, including feeding back fault information to the whole vehicle through the CAN bus.

[0014] Preferably, the SBC module is used to pre-buck and stabilize a wide input range voltage of the whole vehicle to a fixed value as VCC1 output to the FPGA power supply module, and provide a VCC2 power supply meeting the specification requirements for the MCU module.

[0015] Preferably, the power input module can prevent reverse polarity voltage from the vehicle body, filter noise ripple and transient surge voltage from the whole vehicle, and protect the rear module from being damaged.

[0016] According to the application, a vehicle lamp is provided, which includes the AMOLED technology-based vehicle lamp display interaction system, and the vehicle lamp is a vehicle tail lamp or a vehicle headlamp.

[0017] According to the application, the car comprises the car lamp.

[0018] Compared with the prior art, the application has the following beneficial effects: 1. The application adopts the AMOLED panel display + FPGA + MCU control technology architecture in the application of the car lamp, solves the defects of high cost, low pixels, fuzzy display content and limited interactive ability of the traditional ISD technology, and provides a more delicate and smooth information interaction visualization solution for the vehicle and the external environment (V2X) of the future intelligent car.

[0019] 2. The application provides the application of the FPGA in the AMOLED panel control, solves the defect that the clock rate of the control unit, i.e., the MCU, used in the traditional car lamp design is low and cannot support high-pixel screen control, and thereby enables the AMOLED panel to be applied to the car lamp.

[0020] 3. The AMOLED panel adopted in the application can display sharper text and complex graphics and smooth animation, improves the readability and recognition of information in various environments, and simultaneously integrates the thin film transistor (TFT) to drive and control each pixel, has high integration, and does not need to add an additional LED driving chip for the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0021] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings: Figure 1 The circuit diagram of the car lamp display interaction system based on the AMOLED technology in the application; Figure 2 The power-on timing sequence example diagram of the AMOLED panel module in the application; Figure 3 The power-off timing sequence example diagram of the AMOLED panel module in the application; Figure 4 The lighting effect schematic diagram of the AMOLED panel in the application. DETAILED DESCRIPTION

[0022] The application will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be noted that, for those skilled in the art, without departing from the concept of the application, a number of changes and improvements can be made. These all belong to the protection scope of the application.

[0023] The application provides a smart vehicle lamp system (especially a tail lamp) based on an AMOLED (Active-matrix organic light-emitting diode) panel, and aims at the defects of low pixel density, weak information bearing capacity and poor display effect of the tail lamp in the prior art.The vehicle lamp system utilizes the ability of the AMOLED panel to easily realize ten thousand or even higher pixels, and realizes a leap of several orders of magnitude compared with the prior art.The AMOLED panel can display sharper text and complex graphics, smooth animation, and improve the readability and recognition of information in various environments.Meanwhile, the AMOLED panel integrates TFT (Thin Film Transistor) to drive and control each pixel, and has high integration, and thus does not need to add additional LED driving chips to the display panel.

[0024] Referring to Figures 1 to 4 The vehicle lamp display interaction system based on the AMOLED technology disclosed by the application comprises: An AMOLED panel module, which is used as an information output carrier and realizes the display of interactive information of a vehicle to an external environment (V2X); An AMOLED power module, which provides specific power required by the AMOLED panel; An FPGA power module, which provides specific power required by the FPGA; A flash memory module, which pre-stores static image or dynamic video data to be displayed; An FPGA module, which processes display data and generates an image transmission protocol message meeting the requirements of the AMOLED panel; An MCU module, which is responsible for system management, including FPGA state monitoring, AMOLED working state monitoring and processing of whole vehicle logic function input; An SBC module, which provides power supply for the MCU module and provides a communication interface with a whole vehicle network; A power input module, which provides power input for the whole system, has anti-reverse connection and filtering functions and outputs stable power supply.

[0025] The connection relationship between the modules is as follows: The power input module receives external power (PWR), and on one hand, outputs a signal PWR_F to the AMOLED power module; on the other hand, provides power supply path related support for the SBC module (system basic chip).

[0026] The SBC module has CAN communication connection with the outside; provides a VCC1 power supply for the FPGA power module, provides a VCC2 power supply for the MCU module (microcontroller) and performs TX / RX (transmitting / receiving) signal interaction with the MCU module.

[0027] The FPGA power module receives VCC1 provided by the SBC module, and provides VCC_Core (core power) and VCC_MIPI (MIPI related power) for the FPGA respectively.

[0028] The MCU module and the FPGA module interact with each other through SPI (serial peripheral interface) and GPIO (general input output), and also receives NTC Monitor (thermistor monitoring) signals from the AMOLED panel.

[0029] The FPGA module controls the Power Sequencing (power timing) of the AMOLED power module and performs monitoring; it is connected with the AMOLED panel module through the MIPI DSI interface (including CLK / P / N, D0P / N, D1P / N, D2P / N, D3P / N signals, etc.); and it interacts with the FLASH memory through QSPI (four-wire serial peripheral interface).

[0030] The AMOLED power module provides VDD_3V3 / 1V8, AVDD, ELVDD, and ELVSS power for the AMOLED panel under the control of the FPGA.

[0031] The AMOLED panel module receives various power provided by the AMOLED power module, communicates with the FPGA module through the MIPI DSI interface, and outputs NTC Monitor signals to the MCU.

[0032] The following further details of each module are described.

[0033] 1. AMOLED panel module: The AMOLED display panel is integrated in the vehicle lamp assembly, which can be a vehicle tail light or a vehicle headlight, etc., and the pixel density is not less than 10,000 pixels. The AMOLED display panel adopts active matrix organic light emitting diode (AMOLED) technology, has high contrast, wide color gamut, and ultra-fast response speed. The panel can be single-color red, which meets the vehicle tail light regulation requirements to display during driving. The panel thickness is less than 1 mm, and has ultra-narrow frame and high screen ratio, which is applied to the design of automobile tail light and has aesthetic sense.

[0034] 2. AMOLED power module: The AMOLED power module provides specific power supply required by the AMOLED panel module, including: VDD_3V3, which provides power supply for the analog circuit part of the AMOLED, and the typical value is 3.3V.

[0035] VDD_1V8, which provides power supply for the digital circuit part of the AMOLED, and the typical value is 1.8V.

[0036] AVDD, driving IC voltage, provides working voltage for display driving chip, controls pixel switch timing. Voltage range 5V~7.7V.

[0037] ELVDD, positive driving voltage, provides anode bias voltage for AMOLED pixel, directly controls luminous brightness. Voltage range 4.6~7.7V.

[0038] ELVSS, negative driving voltage, adjusts cathode voltage to optimize contrast ratio and eliminate residual image. Voltage range -1.4~-8.4V.

[0039] RESET, AMOLED reset signal.

[0040] The above power supply outputs correctly to the AMOLED module under the control of the FPGA module to meet the power-on and power-off timing requirements of the AMOLED. The power-on timing may vary depending on the different AMOLED. It should be noted that the specific voltage value and voltage range are only for reference and are not limited to specific numerical values. Any technical solution that uses the same or similar circuit structure and uses different numerical values falls within the scope of the present application. Figure 2 and Figure 3 An example of power-on and power-off timing control is given, in which the relative delay between signals needs to meet specific range requirements, for example, T2 needs to be greater than 10ms.

[0041] 3. FPGA power module: Receives pre-buck input VCC1 from the SBC module and provides specific power supply required by the FPGA module, including: VCC_Core, core power supply for the FPGA module, meets the ±20mV accuracy requirement.

[0042] VCC_MIPI, due to the requirement of MIPI DSI (Mobile Industry Processor Interface, Display Serial Interface) communication method, provides additional D-PHY (Display Physical Layer) power supply voltage for the FPGA module, voltage 1.2V, ripple less than 10mVpp.

[0043] 4. Flash memory module: Pre-stores static images or dynamic video data to be displayed, and the images and videos are pre-converted into binary codes in units of pixels for pre-storage. The Flash memory module uses non-volatile flash memory (NOR Flash) with random read speed ≥85MB / s, which can meet the real-time retrieval requirements of 60fps AMOLED video frames.

[0044] 5. FPGA module: Field programmable gate array (FPGA) is a semi-custom integrated circuit that can be reconfigured by programming. Its core value lies in hardware flexibility. By reprogramming, the following module functions can be realized: Protocol conversion function: convert the data pre-stored in the flash memory module into the graphic data stream required by the AMOLED panel. The specific data stream technology can be MIPI DSI (Mobile Industry Processor Interface, Display Serial Interface) technology dedicated to display screen control, with a clock rate of up to 1 Gbps. It can also be QSPI (Quad Serial Peripheral Interface) protocol technology.

[0045] Parallel panel control function: using the low latency hardware characteristics of the FPGA chip, synchronize the output instruction stream to multiple AMOLED panels to ensure high pixel, high data volume control without the problem of display out of sync across panels.

[0046] Timing control function: generate the enable signal of the AMOLED power supply to control the AMOLED power supply to perform power-on and power-off operations on the AMOLED panel with correct timing.

[0047] Power supply state monitoring: monitor whether the power output of the AMOLED power module is normal and feed back to the MCU module.

[0048] 6、MCU module: The MCU module includes: Vehicle V2X interaction instruction receiving and analysis: receiving methods include but are not limited to: Controller Area Network (CAN) bus communication method; After analysis, it is transmitted to the FPGA module through the on-board communication method, and the transmission method includes but is not limited to: Serial Peripheral Interface (SPI) communication.

[0049] FPGA working monitoring: monitoring the working state of the FPGA module, including but not limited to: Monitoring through the general-purpose input-output interface (GPIO) fault flag bit, high level is effective, and the duration ≥100ms is determined as an effective fault.

[0050] AMOLED thermal management function: by reading back the resistance value of the thermistor of the AMOLED module, the current temperature of the AMOLED is obtained, and the thermal management strategy is executed, such as reducing the AMOLED display brightness and reducing the current to reduce the power and temperature rise.

[0051] When a fault occurs, the corresponding software strategy is executed, including but not limited to: Feedback fault information to the vehicle through the CAN bus, such as FPGA failure.

[0052] 7、SBC module: System base chip SBC, an integrated chip integrating communication, power supply and the like. It has the ability of multi-channel stable voltage output, wherein VCC1 is used for power supply for an FPGA power module, and a wide input range voltage value of a whole vehicle is first pre-decreased and stabilized to a fixed value, for example, 5V. VCC2 is responsible for providing a stable working power supply for an MCU module, which meets its specification requirements. At the same time, the SBC module is also responsible for the communication connection data exchange between the MCU module and the whole vehicle, so that the MCU can receive the whole vehicle state / instruction input, and possibly report the system state information to the whole vehicle.

[0053] 8、Power input module: It is used for preventing reverse polarity voltage from a vehicle body and filtering overvoltage stress caused by noise ripple or transient surge voltage from the whole vehicle, so as to avoid damage to the subsequent module.

[0054] Working principle of the vehicle lamp display interaction system based on the AMOLED technology: AMOLED image or video display function working process.

[0055] Step S1: First, the MCU module receives V2X interaction instructions from the whole vehicle, and converts the content instructions required by the FPGA module to control the AMOLED display, and sends them to the FPGA module.

[0056] Step S2: The FPGA module reads the image or video information required to be displayed from the Flash memory module, and converts it into the graphic data stream required by the AMOLED module. Due to the high pixel characteristics of the AMOLED, MIPI DSI display screen control technology may be required, for example, to control a 1080P 60fps AMOLED display module. The FPGA chip has a response rate of ns level and a reconfigurable hardware structure, and can easily realize the MIPI DSI protocol, which is the optimal choice for the MIPI DSI control mode of the AMOLED display module for vehicle lamps.

[0057] When the FPGA reads the information in the Flash, the QSPI communication mode can be used, and the reading rate can be as high as 133MHz, which meets the video data display frame rate requirement.

[0058] Regarding the MIPI protocol, it needs to be explained that MIPI DSI is a high-speed serial interface formulated by the MIPI Alliance, which is used for high-speed communication between devices and display modules. The present application uses the FPGA to realize the MIPI protocol transmission to meet the AMOLED screen driving requirement.

[0059] MIPI DSI has high-speed mode (HS mode) and low-power mode (LP mode), in high-speed mode, FPGA will read the video stream from the FLASH to AMOLED module in the form of MIPI protocol.

[0060] FPGA is also responsible for sending control commands and state information to AMOLED through the low-speed mode of MIPI DSI, to control the normal work of the screen.

[0061] Step S3: AMOLED display; through the display picture or video to realize the information interaction of vehicle to external environment (V2X). The scene includes but is not limited to: When the vehicle brakes, display warning signs or characters, such as "Stop" characters or "!!!" signs.

[0062] When the vehicle is stationary to avoid pedestrians in front, the animation of avoiding pedestrians is played to the rear vehicle.

[0063] When the vehicle is unlocked or locked, a specific animation video is played to achieve the scene effect of welcoming and sending.

[0064] In addition, the MCU module also has system management functions, including: 1) Monitor the working state of FPGA through the general GPIO port.

[0065] 2) Monitor the temperature state of the AMOLED panel through the thermistor NTC.

[0066] 3) When the FPGA works abnormally or the AMOLED panel temperature is abnormal, execute the corresponding coping strategy.

[0067] The application also provides a car light, which can be a vehicle tail light and can also be a car light headlight, the car light adopts the above-mentioned intelligent car light system based on the AMOLED panel, and the lighting effect of the car light refers to Figure 4 As shown.

[0068] The application also provides a car, which adopts the above-mentioned car light.

[0069] The specific embodiments of the application are described above. It should be understood that the application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the application. In the case of no conflict, the embodiments of the application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A vehicle lighting display and interaction system based on AMOLED technology, characterized in that, This includes AMOLED panel modules, AMOLED power modules, FPGA power modules, Flash memory modules, FPGA modules, MCU modules, SBC modules, and power input modules; The power input module receives external power and outputs electrical signals to the AMOLED power module and the SBC module. The SBC module establishes a CAN communication connection with the outside, provides power to the FPGA power module and the MCU module respectively, and interacts with the MCU module via signals. The FPGA power module provides core power and display power to the FPGA module; The MCU module interacts with the FPGA module via signals; the MCU module is electrically connected to the AMOLED panel module and is used to acquire temperature status signals. The FPGA module controls the power timing signal of the AMOLED power module to supply power to the AMOLED panel module. The FPGA module is electrically connected to the Flash memory module for interacting with the image data to be displayed; the FPGA module is also electrically connected to the AMOLED panel module to control the AMOLED panel module to emit light based on the image data.

2. The vehicle lighting display and interaction system based on AMOLED technology according to claim 1, characterized in that, The AMOLED power module provides VDD_3V3 / 1V8, AVDD, ELVDD, and ELVSS power to the AMOLED panel module; The VDD_3V3 is used to power the analog circuitry of the AMOLED. The VDD_1V8 is used to power the digital circuitry of the AMOLED. The AVDD provides operating voltage to the display driver chip to control the pixel switching timing. The ELVDD provides an anode bias voltage for AMOLED pixels to control the luminous brightness; The ELVSS is used to adjust the cathode voltage to optimize contrast and eliminate image retention. The AMOLED power module also outputs an AMOLED reset signal RESET to the AMOLED panel module.

3. The vehicle lighting display and interaction system based on AMOLED technology according to claim 1, characterized in that, The FPGA power module provides the core power supplies VCC_Core and VCC_MIPI to the FPGA module. The VCC_MIPI is used to provide the D-PHY power supply voltage for the FPGA module.

4. The vehicle lighting display and interaction system based on AMOLED technology according to claim 1, characterized in that, The Flash memory module is a non-volatile flash memory that pre-stores static images or dynamic video data to be displayed, and the static images or dynamic video data are pre-converted into binary code in pixels.

5. The vehicle lighting display and interaction system based on AMOLED technology according to claim 1, characterized in that, The FPGA module has protocol conversion function, parallel panel control function, timing control function and power supply status monitoring function; The protocol conversion function includes converting data pre-stored in the Flash memory module into a graphics data stream required by the AMOLED panel module. The graphics data stream technology includes MIPI DSI and QSPI protocol technologies, wherein the clock rate of MIPI DSI can reach 1Gbps. The parallel panel control function includes: synchronously outputting command streams to multiple AMOLED panels; The timing control function includes: generating an enable signal for the AMOLED power supply to control the AMOLED power supply to power on and off the AMOLED panel in the correct timing sequence. The power supply status monitoring function includes: monitoring whether the power output of the AMOLED power module is normal, and feeding back the monitoring results to the MCU module.

6. The vehicle lighting display and interaction system based on AMOLED technology according to claim 1, characterized in that, The MCU module receives and parses the vehicle's V2X interaction commands. The receiving method includes CAN bus communication. After parsing, the commands are transmitted to the FPGA module through on-board communication, including SPI communication. The MCU module monitors the working status of the FPGA module. The monitoring method includes monitoring through GPIO fault flag bits, and a high level lasting ≥100ms is considered a valid fault. The MCU module obtains the current temperature of the AMOLED by reading back the resistance value of the thermistor of the AMOLED module and executes the thermal management strategy. When a system failure occurs, the MCU module executes the corresponding software strategy, including feeding back fault information to the vehicle via the CAN bus.

7. The vehicle lighting display and interaction system based on AMOLED technology according to claim 1, characterized in that, The SBC module is used to pre-step down and stabilize the vehicle's wide input range voltage to a fixed value, and then output it as VCC1 to the FPGA power module, and provide the MCU module with a VCC2 power supply that meets the specifications.

8. The vehicle lighting display and interaction system based on AMOLED technology according to claim 1, characterized in that, The power input module can prevent reverse polarity voltage from the vehicle body, filter out noise ripple and transient surge voltage from the vehicle, and protect downstream modules from damage.

9. A vehicle light, characterized in that, The system includes the vehicle lighting display and interaction system based on AMOLED technology as described in any one of claims 1 to 8, wherein the vehicle lighting is a vehicle taillight or a vehicle headlight.

10. A car, characterized in that, Includes the vehicle lights as described in claim 9.

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