A vehicle display system

Abstract

The application discloses a kind of vehicle-mounted display systems, belongs to the field of intelligent cockpit.The system includes the host for outputting image signal, display screen and flexible wire harness.In the present application, the transmission of image signal and touch signal between host and display screen is realized using two USB-C modules, two chips based on the same serial bus protocol, and a flexible wire harness used in conjunction with the USB-C modules and the chips based on the serial bus protocol. Among them, the host includes a USB-C module and a chip, the display screen includes a USB-C module and a chip, and the flexible wire harness is used to connect the two USB-C modules and the two chips. This scheme not only can significantly reduce the cost, but also can effectively reduce the weight of the wire harness.

Description

Technical Field

[0001] This application relates to the field of smart cockpits, and in particular to an in-vehicle display system. Background Technology

[0002] As new energy vehicles become increasingly intelligent, multiple displays are installed in various locations within the car cabin, such as the instrument panel, central control screen, passenger screen, or rear entertainment screen.

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

[0004] However, SerDes chips are relatively expensive. Additionally, since a vehicle may be equipped with multiple displays, a large amount of coaxial cable or twisted-pair cable is required, resulting in heavy wiring harnesses. Summary of the Invention

[0005] This application provides an in-vehicle display system, the system comprising: a host for outputting image signals, a display screen, a first flexible wiring harness, and a second flexible wiring harness;

[0006] The host includes a first USB-C module and a first chip; the display screen includes 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 cable harness is used to connect the first USB-C module and the second USB-C module;

[0008] The second flexible wire 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 digital form to physical form, and the physical form of the image signal is transmitted to the display screen via the first flexible cable harness;

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

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

[0012] The first chip is used to convert the received touch signal from physical form into digital form, and report the digital touch signal to the software installed on the host, so that the software can perform a response operation that matches 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 physical image signal is transmitted to the display screen through the physical port and via the first flexible cable harness.

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

[0015] In other embodiments, if the specific output interface is an analog high-definition multimedia interface, the physical form of the image signal is a minimized transmission differential signal conforming to the HDMI (High-Definition Multimedia Interface) standard.

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

[0017] In other embodiments, if the specific output interface is a simulated display port, the physical form of the image signal is a signal format conforming to the DP (DisplayPort) standard.

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

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

[0020] The touch chip is used to detect touch operations and convert the detected touch operations into digital touch signals.

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

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

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

[0024] In this embodiment, the transmission of image signals and touch signals between the host and the display screen is achieved using two USB-C modules, two chips based on the same serial bus protocol, and a flexible cable harness used in conjunction with the USB-C modules and the serial bus protocol-based chips. The host includes one USB-C module and one chip, the display screen includes one USB-C module and one chip, and the flexible cable harness connects the two USB-C modules and the two chips. This solution not only significantly reduces costs but also effectively reduces the weight of the cable harness. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0026] Figure 1 This is a schematic diagram of the structure of an in-vehicle display system provided in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0029] In this application, the terms "first," "second," etc., are used to distinguish identical or similar items that have essentially the same function. It should be understood that there is no logical or temporal dependency between "first," "second," and "nth," nor does it limit the quantity or 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 simply used to distinguish one element from another. For example, without departing from the various examples, the first element can be referred to as the second element, and similarly, the second element can be referred to as the first element. Both the first and second elements can be elements, and in some cases, they can be separate and distinct elements.

[0031] "At least one" refers to one or more elements. For example, at least one element can be one element, two elements, three elements, or any integer number of elements greater than or equal to one. "Multiple" refers to two or more elements. For example, multiple elements can be two elements, three elements, or any integer number of elements greater than or equal to two.

[0032] In this article, "and / or" indicates that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following objects 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, data stored, data displayed, 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 related data must comply with the relevant laws, regulations and standards of the relevant regions.

[0034] Figure 1 This is a schematic diagram of the structure of an in-vehicle display system provided in an embodiment of this application.

[0035] See Figure 1 The vehicle-mounted display system includes: a host unit 1 for outputting image signals, a display screen 2, a first flexible wiring harness 3, and a second flexible wiring harness 4. As an example, the image signal output by the host unit 1 is a video signal, but this application does not limit this. Assuming the output image signal is a video signal, then the host unit 1 is also referred to as a video output terminal. Furthermore, Figure 1 The diagram shows one display screen. In practical applications, display screens can be installed in multiple locations within the car cabin, meaning that the number of display screens in an in-vehicle display system is not limited to one. Figure 1 This example only uses one display screen as an illustration.

[0036] In this embodiment, 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] For example, the aforementioned 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 cable harness 3 is used to connect the first USB-C module 11 and the second USB-C module 21, and the second flexible cable harness 4 is used to connect the first chip 12 and the second chip 22. As an example, both the first flexible cable harness 3 and the second flexible cable harness 4 are FFC (Flexible Flat Cable), and this application does not limit them.

[0039] Taking video signals as an example, and first chip 12 and second chip 22 as I2C chips, the first USB-C module 11, second USB-C module 21, first chip 12 and second chip 22 will be introduced below.

[0040] USB-C module

[0041] The USB-C module, also known as the USB Type-C module, is a hardware interface module for the Universal Serial Bus (USB).

[0042] When a video signal needs to be transmitted, it is first encoded. The purpose of encoding is to compress and convert the raw video signal according to a specific format for more efficient transmission via the USB-C module. That is, host 1 encodes the raw video signal. As an example, host 1 can encode the raw video signal according to the HDMI or DP protocol to ensure that the video data is transmitted efficiently and accurately in a format conforming to a specific standard.

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

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

[0045] It should be noted that the specific output interface is formed by the software installed on host 1 through port emulation of the first USB-C module 11. For example, the above-mentioned software can be either system software or application software, and this application does not limit it in this regard.

[0046] The first USB-C module 11 can be used for port emulation via the aforementioned software. Taking the emulation of an HDMI or DP port as an example, the software will reconfigure the first USB-C module 11. During this process, the software will initialize and set the parameters of the first USB-C module 11 according to the specifications of the HDMI or DP protocol, enabling the first USB-C module 11 to function like a real HDMI or DP port.

[0047] Additionally, signal conversion occurs at the physical port of the first USB-C module 11. This signal conversion transforms the encoded digital signal into a physical signal that can be effectively transmitted over a physical medium.

[0048] In other embodiments, if the specific output interface is a simulated HDMI port or a simulated DP port, the encoded video signal reaches the physical port of the first USB-C module 11 through the simulated HDMI port or simulated DP port, and 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 that can recognize the video signal format transmitted through the simulated port.

[0049] Taking an analog HDMI port as an example, the USB-C interface chip converts the encoded video signal into a physical signal conforming to the HDMI protocol. As another example, the USB-C interface chip converts the encoded video signal (in digital form) into differential signal pairs conforming to the TMDS (Transition Minimized Differential Signaling) specification, enabling efficient transmission over the physical medium. Similarly, taking an analog DisplayPort as an example, the USB-C interface chip converts the encoded video signal into a physical signal conforming to the DisplayPort protocol.

[0050] In some embodiments, the first USB-C module 11 also includes a protocol conversion circuit. This circuit works in conjunction with the USB-C interface chip to assist in signal conversion. After the encoded video signal arrives at the physical port of the first USB-C module 11, this circuit preprocesses the encoded video signal according to the signal source (from an analog HDMI port or an analog DP port). For example, it adjusts the signal timing or performs necessary error correction and verification, which is not limited in this application.

[0051] Based on the above description, if a specific output interface is an analog high-definition multimedia interface (i.e., HDMI interface), then the physical form of the video signal is a minimized transmission differential signal conforming to the HDMI standard. This signal transmits video data in the form of differential pairs. If a specific output interface is an analog display port (i.e., DP port), then the physical form of the video signal is a signal format conforming to the DP standard.

[0052] In this embodiment, the second USB-C module 21 is used to convert the received video signal from physical form to digital form, wherein the digital video signal is decoded and displayed on the display screen.

[0053] In other embodiments, if the first flexible cable harness 3 transmits a physical signal conforming to 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 harness 3 transmits a physical signal conforming to the DP protocol, the second USB-C module is used to convert the physical video signal into a DP signal.

[0054] In other embodiments, the signal conversion process may also involve adapting the video signal. For example, based on performance parameters such as the resolution or refresh rate of the display screen 2, the video signal may be scaled or its frame rate adjusted to ensure that the transmitted video can be displayed on the display screen 2 at an appropriate size and with smoothness.

[0055] I2C chip

[0056] In this embodiment, the second chip 22 is used to convert the touch signal from digital form to physical form. The physical form of the touch signal is then transmitted to the host computer via a second flexible cable harness.

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

[0058] In this embodiment of the application, the first chip 12 is used to convert the received touch signal from physical form into digital form, and report the digital touch signal to the software installed on the host, so that the software can perform a response operation that matches the received touch signal.

[0059] In this process, after receiving the physical signal transmitted through the second wiring harness 4, the first chip 12 performs a reverse operation to convert the physical signal back into a digital touch signal. This process is the reverse of the signal conversion performed by the second chip 22. As an example, assuming that the first chip 12 receives a voltage signal, it can convert the received voltage signal according to a pre-set voltage-touch signal conversion rule to obtain information such as touch position and touch action type.

[0060] In other embodiments, the above-mentioned response operation may be an operation such as opening an application, moving an application icon, or performing text input, and this application does not limit this. For example, if a user clicks an application icon on the display screen 2, the touch signal of clicking the application icon will be reported to the software installed on the host 1. The software will then process the touch signal to identify the application icon corresponding to the user's touch position and launch the application corresponding to the application icon.

[0061] In summary, the transmission of image and touch signals between the host and the display screen utilizes two USB-C modules, two chips based on the same serial bus protocol, and a flexible cable harness used in conjunction with the USB-C modules and the serial bus protocol-based chips. The host includes one USB-C module and one chip, the display screen includes one USB-C module and one chip, and the flexible cable harness connects the two USB-C modules and the two chips. This solution not only significantly reduces costs but also effectively reduces the weight of the cable harness.

[0062] Among them, based on Figure 1 The in-vehicle display system shown in this 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 digital to physical form via the first USB-C module; the physical image signal is then transmitted to the display screen via the first flexible cable. Next, the display screen converts the received image signal from physical to digital form via the second USB-C module, performs a decoding operation on the digital image signal, and displays the decoded image.

[0064] Regarding touch signals, after a touch operation is detected, the display screen converts the touch signal from digital to physical form via a second chip; the physical touch signal is then transmitted to the host computer via a second flexible cable. Next, the host computer converts the received touch signal from physical to digital form via a first chip, and reports the digital touch signal to the locally installed software, which then executes 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 physical image signal is transmitted to the display screen through the physical port and via a first flexible cable harness; wherein, the specific output interface is formed by the software through port simulation of the first USB-C module.

[0066] In other embodiments, if a particular output interface is a simulated high-definition multimedia interface, the physical form of the video signal is a minimized transmission differential signal conforming to the HDMI standard.

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

[0068] In other embodiments, if a particular output interface is a simulated display port, the physical form of the image signal is a signal format conforming to the DisplayPort DP standard.

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

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

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

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

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

[0074] In summary, the transmission of image and touch signals between the host and the display screen utilizes two USB-C modules, two chips based on the same serial bus protocol, and a flexible cable harness used in conjunction with the USB-C modules and the serial bus protocol-based chips. The host includes one USB-C module and one chip, the display screen includes one USB-C module and one chip, and the flexible cable harness connects the two USB-C modules and the two chips. This solution not only significantly reduces costs but also effectively reduces the weight of the cable harness.

[0075] Figure 2 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application.

[0076] The computer device 200 can be a host unit inside the vehicle used for transmitting video signals. The computer device 200 can vary considerably due to differences in configuration or performance, and includes one or more Central Processing Units (CPUs) 201 and one or more memories 202, wherein the memory 202 stores at least one piece of program code, which is loaded and executed by the processor 201 to implement the video generation method described above.

[0077] The processor may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor can be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor may also include a main processor and coprocessors. The main processor, also known as the CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the vehicle's screen. In some embodiments, the processor may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0078] Of course, the computer device 200 also has wired or wireless network interfaces, a keyboard, and input / output interfaces for input and output. The computer device 200 also includes other components for implementing the device's 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 program code that can be executed by a processor in a computer device to perform image display in conjunction with an in-vehicle display screen. For example, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), magnetic tape, floppy disk, and optical data storage device, etc.

[0080] In an exemplary embodiment, a computer program product or computer program is also provided, which includes computer program code stored in a computer-readable storage medium. The processor of a computer device reads the computer program code from the computer-readable storage medium and executes the computer program code, thereby enabling the computer device to work with the vehicle display screen to complete image display.

[0081] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

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

Claims

1. A vehicle display system, characterized by, The system includes: a host for outputting image signals, a display screen, a first flexible cable harness, and a second flexible cable harness; The host includes a first USB-C module and a first chip; the display screen includes 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 cable harness is used to connect the first USB-C module and the second USB-C module; The second flexible wire 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 digital form to physical form, and the physical form image signal is transmitted to the display screen through the physical port of the first USB-C module via the first flexible cable harness; the encoded image signal is output to the physical port through a specific output interface; Wherein, the specific output interface is formed by the software installed on the host through port simulation of the first USB-C module; 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 conforming to the high-definition multimedia interface HDMI standard; if the specific output interface is a simulated display port, the physical form of the image signal is a signal format conforming to the display port DP standard. The second USB-C module is used to convert the received image signal from physical form to digital form, and the digital image signal is decoded and displayed on the display screen; The second chip is used to convert the touch signal from digital form to physical form, and the physical form of the touch signal is transmitted to the host via the second flexible wire harness; The first chip is used to convert the received touch signal from physical form into digital form, and report the digital touch signal to the software, so that the software can execute a response operation that matches the touch signal.

2. The system of claim 1, wherein, The second USB-C module is used to convert the received minimized transmission differential signal into an HDMI signal.

3. The system of claim 1, wherein, The second USB-C module is used to convert the physical form of the image signal into a DP signal.

4. The system of claim 1, wherein, The display screen also includes a touch chip; The touch chip is used to detect touch operations and convert the detected touch operations into digital touch signals.

5. The system of any one of claims 1 to 4, wherein, The physical form of the touch signal is a current signal or a voltage signal.

6. The system of any one of claims 1 to 4, wherein, Both the first flexible wire harness and the second flexible wire harness are flexible flat cables.

7. The system of any one of claims 1 to 4, wherein, Both the first chip and the second chip are integrated circuit bus (I2C) chips.

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