Vehicle-mounted fusion display screen based on ARM architecture
By adopting a dual-processing unit hot-standby redundancy design based on ARM architecture for in-vehicle integrated displays, the problems of image fragmentation and single point of failure in traditional multi-screen splicing are solved, achieving fast and reliable switching and improving the system's reliability and response speed.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- RUISIKE (QINGDAO) TECHNOLOGY CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-04-28
AI Technical Summary
Traditional multi-screen splicing has physical gaps that cause a sense of fragmentation in the picture, affecting the information transmission effect. Furthermore, a single point of failure may lead to production interruption or safety accidents, posing safety hazards, especially in scenarios such as industrial control and traffic management.
The vehicle-mounted integrated display screen adopts an ARM architecture and features dual processing units with hot standby redundancy. It utilizes a CPLD automatic switching redundancy design to quickly switch to another processing unit as the primary unit when one processing unit fails, ensuring system reliability and response speed.
It enables rapid switching of processing units within milliseconds, improving system reliability and response speed, and avoiding production interruptions or safety accidents caused by single points of failure.
Smart Images
Figure CN224176959U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of display technology, and in particular relates to an ARM-based automotive converged display screen. Background Technology
[0002] With the increasing demand for large-size displays in fields such as security monitoring, virtual simulation, and industrial design, traditional multi-screen splicing has physical gaps (early as small as 0.5mm), resulting in a fragmented image and affecting the information transmission effect. Furthermore, in scenarios such as industrial control (e.g., PLC systems), traffic management (highway electromechanical engineering), and energy facilities (hydropower station LCU), a single point of failure may lead to production interruption or safety accidents, causing safety hazards and affecting normal production and life. Utility Model Content
[0003] In view of this, this application provides an in-vehicle fusion display based on ARM architecture, which can quickly perform redundancy switching when the processing unit fails, and has high reliability.
[0004] To achieve the above objectives, this application adopts the following technical solution:
[0005] This application provides an ARM-based in-vehicle fusion display screen, including a power supply unit, a first processing unit, a second processing unit, a CPLD, a first signal conversion chip, a second signal conversion chip, an analog switch chip, a display unit, a switching switch, a first audio line, a second audio line, and a speaker;
[0006] The input terminal of the power supply unit is connected to an external power supply, and the output terminal is connected to the first processing unit, the second processing unit, and the CPLD, respectively.
[0007] Both the first processing unit and the second processing unit are connected to the CPLD. The first processing unit is connected to the speaker in sequence through the first audio line and the switch, and the second processing unit is connected to the speaker in sequence through the second audio line and the switch.
[0008] The CPLD is connected to the control terminal of the analog switch chip and the control terminal of the switching switch, respectively.
[0009] The first processing unit is connected to the input terminal of the analog switch chip through the first signal conversion chip, the second processing unit is connected to the input terminal of the analog switch chip through the second signal conversion chip, and the output terminal of the analog switch chip is connected to the display unit.
[0010] In some embodiments, both the first audio line and the second audio line include an audio decoding unit and a power amplifier unit, and both the first processing unit and the second processing unit are connected to the input terminal of the switching switch in sequence through the audio decoding unit and the power amplifier unit.
[0011] In some embodiments, the power supply unit includes a first EMC circuit, a second EMC circuit, a first power module, a second power module, a first DC-DC circuit, a second DC-DC circuit, and a third DC-DC circuit.
[0012] The input terminal of the first EMC circuit is connected to an external power supply, and the output terminal is connected to the first power module; the input terminal of the second EMC circuit is connected to an external power supply, and the output terminal is connected to the second power module.
[0013] Both the first power module and the second power module are connected to the first processing unit through the first DC-DC circuit, connected to the second processing unit through the second DC-DC circuit, and connected to the CPLD through the third DC-DC circuit.
[0014] In some embodiments, the ARM-based in-vehicle fusion display includes a microphone and a voice processing chip, wherein the microphone is connected to a CPLD via the voice processing chip.
[0015] In some embodiments, the ARM-based in-vehicle fusion display includes a first photosensitive sensor, a second photosensitive sensor, a first debug serial port, a second debug serial port, and a clock unit;
[0016] The first photosensitive sensor is connected to the first processing unit, and the second photosensitive sensor is connected to the second processing unit;
[0017] The first debugging serial port is connected to the first processing unit, and the second debugging serial port is connected to the second processing unit;
[0018] The clock unit is connected to either the first processing unit or the second processing unit.
[0019] In some embodiments, the ARM-based in-vehicle fusion display includes a first XC7A chip, a first TRDP PHY chip, a first M12 interface, a second XC7A chip, a second TRDP PHY chip, and a second M12 interface.
[0020] The first XC7A chip, the first TRDP PHY chip, and the first M12 interface are connected in sequence, and the first processing unit is connected to the first XC7A chip through the SPI interface.
[0021] The second XC7A chip, the second TRDP PHY chip, and the second M12 interface are connected in sequence, and the second processing unit is connected to the second XC7A chip through the SPI interface.
[0022] In some embodiments, the first processing unit has two Ethernet interfaces and two USB interfaces, the two Ethernet interfaces being connected to the wired Ethernet interface via a redundant switch.
[0023] The second processing unit has two Ethernet interfaces and two USB interfaces, the two Ethernet interfaces being connected to the wired Ethernet interface via a redundant switch.
[0024] In some embodiments, both the first processing unit and the second processing unit are RK3588 processors, and the CPLD is an XCAU10P chip.
[0025] In some embodiments, the SPI interface of the RK3588 processor is connected to the SPI interface of the XCAU10P chip, the I / O interface of the RK3588 processor is connected to the I / O interface of the XCAU10P chip, the UART interface of the RK3588 processor is connected to the UART interface of the XCAU10P chip, and the XCAU10P chip is also connected to the display unit via the UART interface.
[0026] In some embodiments, the ARM-based in-vehicle fusion display screen further includes indicator lights, which are connected to the UART interface of the XCAU10P chip.
[0027] The advantages of this application compared to the prior art include:
[0028] In this embodiment, a dual-processing-unit hot standby redundancy design is adopted. The first processing unit is the default master and the second processing unit is the default hot standby. When the first processing unit encounters a fault, the CPLD will automatically switch the second processing unit to the master and the first processing unit will enter the hot standby state. In this way, even if one processing unit fails, it can be switched immediately, which has high reliability. Moreover, the processing unit switching time is in the millisecond range, and the response is fast. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 A structural block diagram of an ARM-based in-vehicle converged display screen provided for embodiments of this application;
[0031] Figure 2 This is a schematic diagram of the structure of an ARM-based in-vehicle fusion display screen provided in an embodiment of this application. Detailed Implementation
[0032] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.
[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following description will be provided in conjunction with the accompanying drawings and specific embodiments.
[0034] See Figure 1 The ARM-based vehicle-mounted fusion display provided in this application embodiment may include a power supply unit, a first processing unit, a second processing unit, a CPLD (Complex Programmable Logic Device), a first signal conversion chip, a second signal conversion chip, an analog switch chip, a display unit, a switching switch, a first audio line, a second audio line, and a speaker.
[0035] The power supply unit's input is connected to an external power source, and its output is connected to the first processing unit, the second processing unit, and the CPLD, respectively, supplying power to these units. Both the first and second processing units are connected to the CPLD. The first processing unit is connected to a speaker via a first audio line and a switch, and the second processing unit is connected to a speaker via a second audio line and a switch. The CPLD is connected to the control terminals of both the analog switch chip and the switch. The first processing unit is connected to the input terminal of the analog switch chip via a first signal conversion chip, and the second processing unit is connected to the input terminal of the analog switch chip via a second signal conversion chip. The output terminal of the analog switch chip is connected to the display unit.
[0036] The following describes the operation of the ARM-based in-vehicle fusion display screen according to the embodiments of this application.
[0037] In this embodiment, the first processing unit, the second processing unit, and the CPLD are powered by an external power supply. The first and second processing units operate independently. Signals output from both units are processed by the CPLD. The first processing unit is the default master, while the second is in hot standby mode. When the first processing unit fails, the CPLD switches the second processing unit to master, and the first unit enters hot standby mode. The signals output from the processing units to the CPLD may include SPI (Serial Peripheral Interface) signals, I / O signals, UART (Universal Asynchronous Receiver / Transmitter) signals, and HeartBeat signals. For example, if the CPLD does not receive the HeartBeat signal from the master processing unit, it can be assumed that the master processing unit has failed, and the other processing unit will switch to master.
[0038] In addition, the first processing unit processes the video signal to be displayed and outputs it to the first signal conversion chip, which converts the video signal format, for example, from MIPI (Mobile Industry Processor Interface) signal to LVDS (Low Voltage Differential Signaling) signal. The converted video signal then enters the analog switch chip. The second processing unit processes the video signal to be displayed (which is the same as the video signal from the first processing unit) and outputs it to the second signal conversion chip, which converts the video signal format. The converted video signal then enters the analog switch chip. The video signals input to the first and second processing units are the same, and the conversion operations performed by the first and second signal conversion chips are identical.
[0039] When the first processing unit is in master mode and the second processing unit is in hot standby mode, the CPLD controls the analog switching chip to connect the first signal conversion chip to the display unit, thereby sending the video signal output by the first processing unit to the display unit for display. It also controls the switching switch to connect the first audio path to the speaker, allowing the audio signal output by the first processing unit to be played through the speaker. When the second processing unit is in master mode and the first processing unit is in hot standby mode, the CPLD controls the analog switching chip to connect the second signal conversion chip to the display unit, thereby sending the video signal output by the second processing unit to the display unit for display. It also controls the switching switch to connect the second audio path to the speaker, allowing the audio signal output by the second processing unit to be played through the speaker.
[0040] In this embodiment, a dual-processing-unit hot standby redundancy design is adopted. The first processing unit is the default master and the second processing unit is the default hot standby. When the first processing unit encounters a fault, the CPLD will automatically switch the second processing unit to the master and the first processing unit will enter the hot standby state. In this way, even if one processing unit fails, it can be switched immediately, which has high reliability. Moreover, the processing unit switching time is in the millisecond range, and the response is fast.
[0041] See Figure 2 In some embodiments, both the first audio line and the second audio line include an audio decoding unit and a power amplifier unit, and both the first processing unit and the second processing unit are connected to the input terminal of the switch in sequence through the audio decoding unit and the power amplifier unit.
[0042] See Figure 2 In some embodiments, the power supply unit may include a first EMC circuit, a second EMC circuit, a first power module, a second power module, a first DC-DC circuit, a second DC-DC circuit, and a third DC-DC circuit.
[0043] The input of the first EMC circuit is connected to an external power supply, and its output is connected to the first power module. The input of the second EMC circuit is connected to an external power supply, and its output is connected to the second power module. Both the first and second power modules are connected to the first processing unit via a first DC-DC circuit, to the second processing unit via a second DC-DC circuit, and to the CPLD via a third DC-DC circuit. Both power supplies operate simultaneously. When the power supply is normal, both processing units send heartbeat signals to the CPLD, which then arbitrates which processing unit becomes the master. If the master processing unit fails, its heartbeat signal is lost, and the CPLD, unable to receive the heartbeat signal, will switch the other processing unit to become the master.
[0044] Specifically, the EMC circuit connects to an external 110V power supply and performs anti-interference processing on the 110V voltage. The power module adjusts the 110V voltage to 12V DC, which is then input to three DC-DC circuits. The first DC-DC circuit converts the 12V DC to 5V / 3A DC to power the first processing unit. The second DC-DC circuit converts the 12V DC to 5V / 3A DC to power the second processing unit. The third DC-DC circuit converts the 12V DC to 5V / 3A, 3.3V / 3A, 2.5V / 3A, and 1.0V / 3A DC to power the CPLD. The CPLD requires multiple voltage supplies, including a core voltage of 1.0V, port voltages of 2.5V / 3.3V, and a common voltage of 5V.
[0045] See Figure 2In some embodiments, the above-mentioned ARM-based in-vehicle fusion display may also include a microphone and a voice processing chip, with the microphone connected to the CPLD via the voice processing chip.
[0046] For example, there can be one or more microphones, all of which are connected to the voice processing chip. After the microphones pick up voice commands, the voice processing chip processes the voice commands, such as by reducing noise, and then sends them to the CPLD.
[0047] See Figure 2 In some embodiments, the above-mentioned ARM-based in-vehicle fusion display screen may further include a first photosensor, a second photosensor, a first debug serial port, a second debug serial port, and a clock unit (RTC).
[0048] A first photosensor is connected to a first processing unit, and a second photosensor is connected to a second processing unit. A first debugging serial port is connected to the first processing unit, and a second debugging serial port is connected to the second processing unit. A clock unit is connected to either the first or the second processing unit.
[0049] Specifically, both the first and second photosensors are used to collect ambient light intensity and send the collected ambient light intensity to their respective processing units.
[0050] See Figure 2 In some embodiments, the above-mentioned ARM-based in-vehicle fusion display may include a first XC7A chip, a first TRDP PHY chip, a first M12 interface, a second XC7A chip, a second TRDP PHY chip, and a second M12 interface.
[0051] The first XC7A chip, the first TRDP PHY chip, and the first M12 interface are connected sequentially. The first processing unit is connected to the first XC7A chip via an SPI interface. The second XC7A chip, the second TRDP PHY chip, and the second M12 interface are connected sequentially. The second processing unit is connected to the second XC7A chip via an SPI interface. The first XC7A chip, the first TRDP PHY chip, and the first M12 interface together implement the MVB (Multifunction Vehicle Bus) function of the train communication network.
[0052] The number of first M12 interfaces can be two, and the two first M12 interfaces are independent of each other; the number of second M12 interfaces can be two, and the two second M12 interfaces are independent of each other.
[0053] In some embodiments, the first processing unit may have two Ethernet interfaces and two USB interfaces, the two Ethernet interfaces being connected to the wired Ethernet interface via a redundant switch. The second processing unit has two Ethernet interfaces and two USB interfaces, the two Ethernet interfaces being connected to the wired Ethernet interface via a redundant switch.
[0054] For example, in the embodiments of this application, both the first processing unit and the second processing unit can be RK3588 processors, and the CPLD can be an XCAU10P chip.
[0055] See Figure 2 The RK3588 processor's SPI interface is connected to the XCAU10P chip's SPI interface, its I / O interface is connected to the XCAU10P chip's I / O interface, and its UART interface is connected to the XCAU10P chip's UART interface. The XCAU10P chip also connects to a display unit (such as an LCD screen) via its UART interface. The RK3588 processor can send HeartBeat signals to the XCAU10P chip via the UART interface.
[0056] The RK3588 processor's I2S interface connects to the audio decoding unit, its SPI interface connects to the XC7 chip, its two ENET interfaces connect to a redundant switch, its two USB interfaces connect to a USB port, and its MIPI interface connects to a signal conversion chip. The signal conversion chip converts the MIPI video signal sent by the RK3588 processor into an LVDS video signal, which is then sent to the analog switching chip.
[0057] For example, the signal conversion chip can be LT9211, and the analog switch chip can be TMUXHS4412. The LVDS output port of the signal conversion chip is connected to the LVDS input port of the analog switch chip, and the LVDS output port of the analog switch chip is connected to the LCD screen.
[0058] See Figure 2 The aforementioned ARM-based in-vehicle converged display screen may also include indicator lights, which are connected to the UART interface of the XCAU10P chip. These indicator lights may include a power light, a communication light, and an alarm light. When the power supply is normal, the XCAU10P chip illuminates the power light via the UART interface; otherwise, the power light is off. When communication between the processing unit and the CPLD is normal, the XCAU10P chip illuminates the communication light via the UART interface; otherwise, the communication light is off. When a fault is detected in the processing unit, the XCAU10P chip illuminates the alarm light via the UART interface; otherwise, the alarm light is off.
[0059] In addition, the UART interface of the XCAU10P chip is connected to the voice processing chip, the I / O interface of the XCAU10P chip is connected to the control terminal of the analog switch chip, and the UART interface of the XCAU10P chip is connected to the display unit. The XCAU10P chip obtains touch input data from the LCD screen through the UART interface, thereby realizing human-computer interaction.
[0060] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.
Claims
1. An in-vehicle fusion display screen based on ARM architecture, characterized in that, It includes a power supply unit, a first processing unit, a second processing unit, a CPLD, a first signal conversion chip, a second signal conversion chip, an analog switch chip, a display unit, a switching switch, a first audio line, a second audio line, and a speaker; The input terminal of the power supply unit is connected to an external power supply, and the output terminal is connected to the first processing unit, the second processing unit, and the CPLD, respectively. Both the first processing unit and the second processing unit are connected to the CPLD. The first processing unit is connected to the speaker in sequence through the first audio line and the switch, and the second processing unit is connected to the speaker in sequence through the second audio line and the switch. The CPLD is connected to the control terminal of the analog switch chip and the control terminal of the switching switch, respectively. The first processing unit is connected to the input terminal of the analog switch chip through the first signal conversion chip, the second processing unit is connected to the input terminal of the analog switch chip through the second signal conversion chip, and the output terminal of the analog switch chip is connected to the display unit.
2. The ARM-based in-vehicle fusion display screen according to claim 1, characterized in that, Both the first audio line and the second audio line include an audio decoding unit and a power amplifier unit. The first processing unit and the second processing unit are connected to the input terminal of the switch in sequence through the audio decoding unit and the power amplifier unit.
3. The in-vehicle fusion display screen based on ARM architecture according to claim 1, characterized in that, The power supply unit includes a first EMC circuit, a second EMC circuit, a first power module, a second power module, a first DC-DC circuit, a second DC-DC circuit, and a third DC-DC circuit. The input terminal of the first EMC circuit is connected to an external power supply, and the output terminal is connected to the first power module; the input terminal of the second EMC circuit is connected to an external power supply, and the output terminal is connected to the second power module. Both the first power module and the second power module are connected to the first processing unit through the first DC-DC circuit, connected to the second processing unit through the second DC-DC circuit, and connected to the CPLD through the third DC-DC circuit.
4. The ARM-based in-vehicle fusion display screen according to claim 1, characterized in that, The ARM-based in-vehicle fusion display includes a microphone and a voice processing chip, with the microphone connected to the CPLD via the voice processing chip.
5. The ARM-based in-vehicle fusion display screen according to claim 1, characterized in that, The ARM-based in-vehicle fusion display screen includes a first photosensitive sensor, a second photosensitive sensor, a first debugging serial port, a second debugging serial port, and a clock unit; The first photosensitive sensor is connected to the first processing unit, and the second photosensitive sensor is connected to the second processing unit; The first debugging serial port is connected to the first processing unit, and the second debugging serial port is connected to the second processing unit; The clock unit is connected to either the first processing unit or the second processing unit.
6. The ARM-based in-vehicle fusion display screen according to claim 1, characterized in that, The ARM-based in-vehicle fusion display includes a first XC7A chip, a first TRDP PHY chip, a first M12 interface, a second XC7A chip, a second TRDP PHY chip, and a second M12 interface. The first XC7A chip, the first TRDP PHY chip, and the first M12 interface are connected in sequence, and the first processing unit is connected to the first XC7A chip through the SPI interface. The second XC7A chip, the second TRDP PHY chip, and the second M12 interface are connected in sequence, and the second processing unit is connected to the second XC7A chip through the SPI interface.
7. The ARM-based in-vehicle fusion display screen according to claim 1, characterized in that, The first processing unit has two Ethernet interfaces and two USB interfaces. The two Ethernet interfaces are connected to the wired Ethernet interface through a redundant switch. The second processing unit has two Ethernet interfaces and two USB interfaces, the two Ethernet interfaces being connected to the wired Ethernet interface via a redundant switch.
8. The ARM-based in-vehicle fusion display screen according to claim 1, characterized in that, Both the first processing unit and the second processing unit are RK3588 processors, and the CPLD is an XCAU10P chip.
9. The ARM-based in-vehicle fusion display screen according to claim 8, characterized in that, The SPI interface of the RK3588 processor is connected to the SPI interface of the XCAU10P chip, the I / O interface of the RK3588 processor is connected to the I / O interface of the XCAU10P chip, the UART interface of the RK3588 processor is connected to the UART interface of the XCAU10P chip, and the XCAU10P chip is also connected to the display unit through the UART interface.
10. The ARM-based in-vehicle fusion display screen according to claim 9, characterized in that, The ARM-based in-vehicle fusion display also includes indicator lights, which are connected to the UART interface of the XCAU10P chip.