Vehicle-mounted display system

Abstract

The invention discloses a vehicle-mounted display system, and belongs to the field of intelligent cabins. The system comprises a host used for outputting image signals, a display screen and a flexible wire harness. In the application, the transmission of the image signal and the touch signal between the host and the display screen is realized by adopting two USB-C modules, two chips based on the same serial bus protocol, and a flexible wire harness matched with the USB-C modules and the chips based on the serial bus protocol. Wherein the host comprises a USB-C module and a chip, the display screen comprises a USB-C module and a chip, and the flexible wire harness is used for connecting the two USB-C modules and the two chips. According to the scheme, the cost can be remarkably reduced, and the weight of the wire harness can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of smart cockpits, and in particular to a vehicle-mounted display system. Background Art

[0002] As new energy vehicles become increasingly intelligent, display screens are installed in multiple locations inside the car cabin, such as the instrument panel, central control screen, co-pilot screen or rear entertainment screen, and many other display screens are arranged in the cabin.

[0003] Currently, the transmission of image signals and touch signals between the host and the display is based on a pair of serdes chips and a coaxial cable (or twisted pair) used in conjunction with them.

[0004] However, the cost of serdes chips is relatively high. In addition, since the entire vehicle may be equipped with multiple display screens, a large number of coaxial cables or twisted pair cables are required, which leads to the problem of heavy wiring harnesses. Summary of the invention

[0005] An embodiment of the present application provides a vehicle-mounted display system, the system comprising: a host for outputting an image signal, a display screen, a first flexible wire harness and a second flexible wire harness;

[0006] The host comprises a first USB-C module and a first chip; the display comprises a second USB-C module and a second chip; wherein the first chip and the second chip are chips based on the same serial bus protocol;

[0007] The first flexible harness is used to connect the first USB-C module and the second USB-C module;

[0008] The second flexible wiring harness is used to connect the first chip and the second chip;

[0009] The first USB-C module is used to convert the encoded image signal from a digital form to a physical form, and the image signal in the physical form is transmitted to the display screen via the first flexible harness;

[0010] The second USB-C module is used to convert the received image signal from a physical form into a digital form, and the image signal in the digital form is displayed on the display screen after being decoded;

[0011] The second chip is used to convert the touch signal from a digital form into a physical form, and the touch signal in the physical form is transmitted to the host via the second flexible harness;

[0012] The first chip is used to convert the received touch signal from a physical form into a digital form, and report the touch signal in digital form to the software installed on the host, so that the software executes a response operation matching the touch signal.

[0013] In some embodiments, the encoded image signal is output to the physical port of the first USB-C module through a specific output interface; the image signal in physical form is transmitted to the display screen through the physical port and via the first flexible harness;

[0014] The specific output interface is formed by the software through port simulation of the first USB-C module.

[0015] In some other embodiments, if the specific output interface is a simulated high-definition multimedia interface, the physical form of the image signal is a minimized transmission differential signal that complies with the HDMI (High-Definition Multimedia Interface) standard.

[0016] In some other embodiments, the second USB-C module is used to convert the received TMDS signal into an HDMI signal.

[0017] In some other embodiments, if the specific output interface is an analog display port, the physical form of the image signal is a signal format that complies with the DP (DisplayPort) standard.

[0018] In some other embodiments, the second USB-C module is used to convert the image signal in physical form into a DP signal.

[0019] In some other embodiments, the display screen further includes a touch chip;

[0020] The touch chip is used to detect a touch operation and convert the detected touch operation into the touch signal in digital form.

[0021] In other embodiments, the touch signal in a physical form is a current signal or a voltage signal.

[0022] In some other embodiments, both the first flexible wiring harness and the second flexible wiring harness are flexible flat cables.

[0023] In some other embodiments, both the first chip and the second chip are I2C (Inter-Integrated Circuit) chips.

[0024] In the embodiment of the present application, the transmission of image signals and touch signals between the host and the display screen is realized by using two USB-C modules, two chips based on the same serial bus protocol, and a flexible harness used in combination with the USB-C modules and the chip based on the serial bus protocol. The host includes a USB-C module and a chip, the display includes a USB-C module and a chip, and the flexible harness is used to connect the two USB-C modules and the two chips. This solution can not only significantly reduce costs, but also effectively reduce the weight of the harness. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a structural schematic diagram of a vehicle-mounted display system provided in an embodiment of the present application;

[0027] Figure 2 It is a structural diagram of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0029] In this application, the terms "first", "second", etc. are used to distinguish the same or similar items with substantially the same role and function. It should be understood that there is no logical or temporal dependency between "first", "second", and "nth", nor is there a limitation on the quantity and execution order. It should also be understood that although the following description uses the terms first, second, etc. to describe various elements, these elements should not be limited by the terms.

[0030] These terms are only used to distinguish one element from another element. For example, without departing from the scope of various examples, a first element can be referred to as a second element, and similarly, a second element can also be referred to as a first element. Both the first element and the second element can be elements, and in some cases, can be separate and different elements.

[0031] Here, at least one means one or more than one, for example, at least one element can be one element, two elements, three elements, or any other integer greater than or equal to one. And multiple means two or more than two, for example, multiple elements can be two elements, three elements, or any other integer greater than or equal to two.

[0032] The "and / or" mentioned in this article indicates that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship.

[0033] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.) and signals involved in this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards in the relevant regions.

[0034] Figure 1 It is a structural schematic diagram of a vehicle-mounted display system provided in an embodiment of the present application.

[0035] See also Figure 1 The vehicle display system includes: a host 1 for outputting an image signal, a display screen 2, a first flexible harness 3, and a second flexible harness 4. As an example, the image signal output by the host 1 is a video signal, which is not limited in this application. Assuming that the output image signal is a video signal, the host 1 is also called a video output terminal. In addition, Figure 1 The number of display screens shown in the figure is 1. In actual applications, display screens can be arranged at multiple locations in the vehicle cabin, that is, the number of display screens included in the vehicle display system is not limited to 1. Figure 1 The example is just one display screen.

[0036] In the embodiment of the present application, the host 1 includes a first USB-C module 11 and a first chip 12, and the display screen 2 includes a second USB-C module 21 and a second chip 22. The first chip 12 and the second chip 22 are chips based on the same serial bus protocol.

[0037] Exemplarily, the above serial bus protocols include, but are not limited to: UART (Universal Asynchronous Receiver / Transmitter), RS232, RS485, I2C, SPI (Serial Peripheral Interface), CAN (Controller Area Network) and I2S (Inter-IC Sound), which are not limited in this application. Taking I2C as an example, the first chip 12 and the second chip 22 are both I2C chips.

[0038] like Figure 1 As shown, the first flexible harness 3 is used to connect the first USB-C module 11 and the second USB-C module 21, and the second flexible harness 4 is used to connect the first chip 12 and the second chip 22. As an example, the first flexible harness 3 and the second flexible harness 4 are both FFC (Flexible Flat Cable), which is not limited in this application.

[0039] Taking the image signal as a video signal, and the first chip 12 and the second chip 22 being I2C chips as an example, the first USB-C module 11, the second USB-C module 21, the first chip 12 and the second chip 22 are respectively introduced below.

[0040] USB-C Module

[0041] Among them, the USB-C module is called USB Type-C module, which is a hardware interface module of Universal Serial Bus (USB).

[0042] When a video signal needs to be transmitted, it will first be encoded. The purpose of encoding is to compress and convert the original video signal into a specific format so that it can be transmitted more efficiently through the USB-C module. That is, the host 1 will encode the original video signal. As an example, the host 1 can encode the original video signal according to the HDMI protocol or the DP protocol so that the video data can be efficiently and accurately transmitted in a format that meets specific standards.

[0043] In the embodiment of the present application, the first USB-C module 11 is used to convert the encoded video signal from a digital form to a physical form. The video signal in the physical form is transmitted to the display screen 2 via the first flexible harness 3.

[0044] In some embodiments, the encoded video signal is output to a physical port of the first USB-C module 11 through a specific output interface, and the video signal in physical form is transmitted to the display screen 2 through the physical port and via the first flexible harness 3 .

[0045] It should be noted that the specific output interface is formed by software installed on the host 1 through port simulation of the first USB-C module 11. Exemplarily, the above-mentioned software can be either system software or application software, which is not limited in this application.

[0046] Among them, the first USB-C module 11 can perform port simulation through the above software. Taking the simulation of HDMI port or DP port as an example, the above software will reconfigure the functions of the first USB-C module 11. In this process, the above software will initialize and set parameters of the first USB-C module 11 according to the specifications of the HDMI protocol or DP protocol, so that the first USB-C module 11 can work like a real HDMI port or DP port.

[0047] In addition, signal conversion is performed at the physical port of the first USB-C module 11. The signal conversion here is to convert the encoded digital signal into a physical signal that can be effectively transmitted in a physical medium.

[0048] In other embodiments, if the specific output interface is a simulated HDMI port or a DP port, after the encoded video signal reaches the physical port of the first USB-C module 11 through the simulated HDMI port or the simulated DP port, the signal conversion is completed by the USB-C interface chip included in the first USB-C module 11. The USB-C interface chip contains complex circuit logic, which can identify the format of the video signal transmitted by the simulated port.

[0049] Taking the analog HDMI port as an example, the USB-C interface chip will convert the encoded video signal into a physical signal that complies with the HDMI protocol according to the HDMI protocol. As an example, the USB-C interface chip converts the encoded video signal (in digital form) into a differential signal pair that complies with the TMDS (Transition Minimized Differential Signaling) specification, which can be effectively transmitted in the physical medium. Taking the analog DP port as an example, the USB-C interface chip will convert the encoded video signal into a physical signal that complies with the DP protocol according to the DP protocol.

[0050] In other embodiments, the first USB-C module 11 further includes a protocol conversion circuit. The circuit works in conjunction with the USB-C interface chip to assist in signal conversion. After the encoded video signal reaches the physical port of the first USB-C module 11, the circuit pre-processes the encoded video signal according to the signal source (from the simulated HDMI port or the simulated DP port). For example, the signal timing is adjusted or necessary error correction and verification are performed on the signal, which is not limited in this application.

[0051] Based on the above description, it can be known that if the specific output interface is a simulated high-definition multimedia interface (i.e., HDMI interface), the physical form of the video signal is a minimized transmission differential signal that complies with the HDMI standard, and this signal transmits video data in the form of a differential pair. If the specific output interface is a simulated display port (i.e., DP port), the physical form of the video signal is a signal format that complies with the DP standard.

[0052] In the embodiment of the present application, the second USB-C module 21 is used to convert the received video signal from a physical form to a digital form, wherein the digital video signal is displayed on the display screen after being decoded.

[0053] In other embodiments, if the first flexible cable 3 transmits a physical signal that complies with the HDMI protocol, the second USB-C module is used to convert the received TMDS signal into an HDMI signal. If the first flexible cable 3 transmits a physical signal that complies with the DP protocol, the second USB-C module is used to convert the physical form of the video signal into a DP signal.

[0054] In other embodiments, the signal conversion process may also involve adapting the video signal, for example, scaling or adjusting the frame rate of the video signal according to performance parameters such as the resolution or refresh rate of the display screen 2, to ensure that the transmitted video can be displayed on the display screen 2 with a suitable size and smoothness.

[0055] I2C Chip

[0056] In the embodiment of the present application, the second chip 22 is used to convert the touch signal from a digital form to a physical form, wherein the touch signal in the physical form is transmitted to the host via the second flexible harness.

[0057] As an example, the display screen 2 also includes a touch chip. The touch chip is used to detect touch operations and convert the detected touch operations into touch signals in digital form. That is, the touch chip can sense the user's touch actions, such as single-click, double-click, slide or long press operations. The touch chip can be of different types such as capacitive and resistive. Taking a capacitive touch chip as an example, when a finger touches the screen, the capacitance value at the touch point will change, and the touch chip can detect this capacitance change and convert it into a digital signal. This digital signal is then transmitted to the second chip 22. The second chip 22 is used to convert the digital touch signal into a physical signal. Exemplarily, this physical signal can be in the form of voltage, current or other analog signals, which is not limited in this application.

[0058] In the embodiment of the present application, the first chip 12 is used to convert the received touch signal from a physical form into a digital form, and report the digital touch signal to the software installed on the host, and then the software executes a response operation matching the received touch signal.

[0059] After receiving the physical signal transmitted through the second wiring harness 4, the first chip 12 will perform a reverse operation to convert the physical signal back into a touch signal in digital form, and this process is the reverse process of the signal conversion performed by the second chip 22. As an example, assuming that the first chip 12 receives a voltage signal, the first chip 12 can convert the received voltage signal according to a preset conversion rule between voltage and touch signal, and then obtain information such as touch position and touch action type.

[0060] In other embodiments, the above-mentioned response operation may be opening a certain application, moving an application icon, or performing text input, etc., which is not limited in this application. For example, if a user clicks on an application icon on the display screen 2, a touch signal related to clicking the application icon will be reported to the software installed on the host 1. Then, the software identifies the application icon corresponding to the user's touch position by processing the touch signal, and starts the application corresponding to the application icon.

[0061] In summary, the transmission of image signals and touch signals between the host and the display is achieved by using two USB-C modules, two chips based on the same serial bus protocol, and a flexible harness used with the USB-C modules and the chip based on the serial bus protocol. The host includes a USB-C module and a chip, the display includes a USB-C module and a chip, and the flexible harness is used to connect the two USB-C modules and the two chips. This solution can not only significantly reduce costs, but also effectively reduce the weight of the harness.

[0062] Among them, based on Figure 1 The vehicle-mounted display system shown in the figure, the embodiment of the present application also provides a display method. The method includes:

[0063] For the image signal, the host encodes the original image signal and converts the encoded image signal from a digital form to a physical form through the first USB-C module; wherein the physical form of the image signal is transmitted to the display screen via the first flexible harness. Next, the display screen converts the received image signal from a physical form to a digital form through the second USB-C module, performs a decoding operation on the digital form of the image signal, and displays the decoded image.

[0064] For the touch signal, after detecting the touch operation, the display screen converts the touch signal from digital form to physical form through the second chip; wherein the physical touch signal is transmitted to the host via the second flexible harness. Next, the host converts the received touch signal from physical form to digital form through the first chip, and reports the digital touch signal to the locally installed software, calling the software to execute a response operation matching the digital touch signal.

[0065] In some embodiments, the encoded image signal is output to the physical port of the first USB-C module through a specific output interface; the image signal in physical form is transmitted to the display screen through the physical port and via the first flexible wiring harness; wherein the specific output interface is formed by the software through port simulation of the first USB-C module.

[0066] In some other embodiments, if the specific output interface is a simulated high-definition multimedia interface, the physical form of the image signal is a minimized differential signal that complies with the HDMI standard.

[0067] In other embodiments, the display converts the received TMDS signal into an HDMI signal through a second USB-C module.

[0068] In some other embodiments, if the specific output interface is an analog display port, the physical form of the image signal is a signal format that complies with the display port DP standard.

[0069] In some other embodiments, the display screen converts the physical image signal into a DP signal through a second USB-C module.

[0070] In other embodiments, the display screen detects touch operations through a touch chip, and converts the detected touch operations into touch signals in digital form through the touch chip.

[0071] In other embodiments, the physical touch signal is a current signal or a voltage signal.

[0072] In some other embodiments, both the first flexible harness and the second flexible harness are FFCs.

[0073] In some other embodiments, the first chip and the second chip are both I2C chips.

[0074] In summary, the transmission of image signals and touch signals between the host and the display is achieved by using two USB-C modules, two chips based on the same serial bus protocol, and a flexible harness used with the USB-C modules and the chip based on the serial bus protocol. The host includes a USB-C module and a chip, the display includes a USB-C module and a chip, and the flexible harness is used to connect the two USB-C modules and the two chips. This solution can not only significantly reduce costs, but also effectively reduce the weight of the harness.

[0075] Figure 2 It is a structural diagram of a computer device provided in an embodiment of the present application.

[0076] The computer device 200 may be a host in a vehicle for transmitting image signals. The computer device 200 may have relatively large differences due to different configurations or performances, and includes one or more processors (Central Processing Units, CPU) 201 and one or more memories 202, wherein the memory 202 stores at least one program code, and the at least one program code is loaded and executed by the processor 201 to implement the above-mentioned video generation method.

[0077] Among them, the processor may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor can be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content that needs to be displayed on the vehicle display. In some embodiments, the processor may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0078] Of course, the computer device 200 also has components such as a wired or wireless network interface, a keyboard, and an input and output interface for input and output. The computer device 200 also includes other components for realizing device functions, which will not be described in detail here.

[0079] In an exemplary embodiment, a computer-readable storage medium is also provided, such as a memory including a program code, and the program code can be executed by a processor in a computer device to display images in conjunction with an on-board display screen. For example, the computer-readable storage medium can be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, etc.

[0080] In an exemplary embodiment, a computer program product or a computer program is also provided, which includes a computer program code, which is stored in a computer-readable storage medium. A processor of a computer device reads the computer program code from the computer-readable storage medium, and the processor executes the computer program code, so that the computer device completes image display in conjunction with a vehicle-mounted display screen.

[0081] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0082] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A vehicle-mounted display system, characterized in that: The system comprises: a host for outputting image signals, a display screen, a first flexible wire harness and a second flexible wire harness; The host comprises a first USB-C module and a first chip; the display comprises a second USB-C module and a second chip; wherein the first chip and the second chip are chips based on the same serial bus protocol; The first flexible harness is used to connect the first USB-C module and the second USB-C module; The second flexible wiring harness is used to connect the first chip and the second chip; The first USB-C module is used to convert the encoded image signal from a digital form to a physical form, and the image signal in the physical form is transmitted to the display screen via the first flexible harness; The second USB-C module is used to convert the received image signal from a physical form into a digital form, and the image signal in the digital form is displayed on the display screen after being decoded; The second chip is used to convert the touch signal from a digital form into a physical form, and the touch signal in the physical form is transmitted to the host via the second flexible harness; The first chip is used to convert the received touch signal from a physical form into a digital form, and report the touch signal in digital form to the software installed on the host, so that the software executes a response operation matching the touch signal.

2. The system according to claim 1, characterized in that The encoded image signal is output to the physical port of the first USB-C module through a specific output interface; the image signal in physical form is transmitted to the display screen through the physical port and via the first flexible harness; The specific output interface is formed by the software through port simulation of the first USB-C module.

3. The system according to claim 2, characterized in that If the specific output interface is a simulated high-definition multimedia interface, the image signal in physical form is a minimized transmission differential signal that complies with the high-definition multimedia interface HDMI standard.

4. The system according to claim 3, characterized in that The second USB-C module is used to convert the received minimized transmission differential signal into an HDMI signal.

5. The system according to claim 2, characterized in that If the specific output interface is an analog display port, the physical form of the image signal is a signal format that complies with the display port DP standard.

6. The system according to claim 5, characterized in that The second USB-C module is used to convert the image signal in physical form into a DP signal.

7. The system according to claim 1, characterized in that The display screen also includes a touch chip; The touch chip is used to detect a touch operation and convert the detected touch operation into the touch signal in digital form.

8. The system according to any one of claims 1 to 7, characterized in that The touch signal in a physical form is a current signal or a voltage signal.

9. The system according to any one of claims 1 to 7, characterized in that The first flexible wiring harness and the second flexible wiring harness are both flexible flat cables.

10. The system according to any one of claims 1 to 7, characterized in that The first chip and the second chip are both integrated circuit bus I2C chips.

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