Instrument display screen control circuit, instrument display screen, instrument display screen control system and vehicle

Abstract

The utility model discloses an instrument display screen control circuit, an instrument display screen, an instrument display screen control system and a vehicle. The instrument display screen control circuit comprises an icon drawing module, a main control module and a display module, the icon drawing module is used for being connected with a cockpit host and is connected with the display module; the main control module is used for connecting a cockpit host and a vehicle CAN gateway, is connected with the icon drawing module, and is used for controlling the icon drawing module to draw an instrument indication icon according to an instrument signal of the cockpit host or a safety message signal output by the vehicle CAN gateway; and the display module is connected with the main control module and is used for displaying the instrument indication icon output by the icon drawing module under the control of the main control module. According to the technical scheme, when the driving cabin host fails, a driver can timely and effectively know the current vehicle body fault condition through the instrument indication icons output by the icon drawing module and the display module, and the safety and reliability of the safety display function of the instrument display screen are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and in particular to an instrument display screen control circuit, an instrument display screen, an instrument display screen control system and a vehicle. Background Art

[0002] At present, in order to ensure the driving safety of users, the instrument display screens in new energy vehicles generally have the requirement of safety display functions.

[0003] Conventional technology typically draws instrument indicators on the cockpit main unit, then uses CRC checks to verify that the indicators transmitted by the main unit are drawn correctly. If an incorrect drawing is detected, the main unit is immediately notified to redraw the instrument. However, this approach may prevent the driver from receiving timely feedback on the instrument indicators displayed on the instrument display when a cockpit main unit fails, posing a safety risk. Utility Model Content

[0004] The embodiments of the present utility model provide an instrument display screen control circuit, an instrument display screen, an instrument display screen control system and a vehicle, so as to solve the problem that the safety display function of the instrument display screen has safety risks.

[0005] An instrument display screen control circuit includes an icon drawing module, a main control module and a display module;

[0006] The icon drawing module is used to connect to the cockpit host and is connected to the display module;

[0007] The main control module is used to connect the cockpit host and the vehicle CAN gateway, and is connected to the icon drawing module, and is used to control the icon drawing module to draw the instrument indicator icon according to the instrument signal of the cockpit host or the safety message signal output by the vehicle CAN gateway;

[0008] The display module is connected to the main control module and is used to display the instrument indication icon output by the icon drawing module under the control of the main control module.

[0009] Furthermore, it includes a deserializer; the input end of the deserializer is used to connect to the cockpit host, and the output end of the deserializer is connected to the icon drawing module and the main control module.

[0010] Further, it includes a backlight driving module;

[0011] The backlight driving module is connected to the main control module and the display module, and is used to drive the display module to turn on or off the backlight mode under the control of the main control module.

[0012] Furthermore, the icon drawing module includes an OSD chip;

[0013] The OSD chip is connected to the main control module and the display module, and is used to enter the simple mode or the normal mode under the control of the main control module, draw the instrument indication icon, and send the instrument indication icon to the display module and the main control module.

[0014] Furthermore, the icon drawing module also includes an icon storage module;

[0015] The icon storage module is used to store preset indication icons;

[0016] The OSD chip is also connected to the icon storage module, and is used to send the instrument indication icon and the preset indication icon to the main control module, and redraw the instrument indication icon when receiving the redraw control signal from the main control module.

[0017] Furthermore, the icon storage module includes a Flash module.

[0018] Furthermore, it includes a CAN module; the CAN module is connected to the main control module, used to connect to the vehicle CAN gateway, filter the message signal of the vehicle CAN gateway, and output the safety message signal to the main control module.

[0019] An instrument display screen includes the above-mentioned instrument display screen control circuit.

[0020] An instrument display screen control system comprises a cockpit host and the above-mentioned instrument display screen; the cockpit host is connected to the icon drawing module.

[0021] A vehicle comprises a vehicle CAN gateway and the above-mentioned instrument display screen control system; the vehicle CAN gateway is connected to the main control module.

[0022] The above-mentioned instrument display screen control circuit, instrument display screen, instrument display screen control system and vehicle, the instrument display screen control circuit includes an icon drawing module, a main control module and a display module; the icon drawing module is used to connect to the cockpit host and is connected to the display module; the main control module is used to connect to the cockpit host and the vehicle CAN gateway, and is connected to the icon drawing module, and is used to control the icon drawing module to draw instrument indication icons according to the instrument signal of the cockpit host or the safety message signal output by the vehicle CAN gateway; the display module is connected to the main control module, and is used to display the instrument indication icons output by the icon drawing module under the control of the main control module, so that when the cockpit host fails, the instrument indication icons are drawn and verified by the icon drawing module, ensuring that when the cockpit host fails, the driver can timely and effectively understand the current vehicle body fault situation through the instrument indication icons output by the icon drawing module and the display module, thereby ensuring the safety and reliability of the instrument display screen safety display function. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 This is a circuit diagram of an instrument display screen control system in one embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of a display module in a simple mode according to an embodiment of the present invention;

[0026] Figure 3 Schematic diagram of a display module in normal mode in one embodiment of the present invention.

[0027] In the figure: 1. Instrument display screen; 11. Icon drawing module; 111. OSD chip; 112. Icon storage module; 12. Main control module; 13. Display module; 14. Deserializer; 15. Backlight driver module; 16. CAN module; 2. Cockpit host; 3. Vehicle CAN gateway. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] It should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make the disclosure thorough and complete and to fully convey the scope of the present invention to those skilled in the art. In the drawings, the dimensions and relative dimensions of layers and regions may be exaggerated for clarity. Like reference numerals denote like elements throughout.

[0030] It should be understood that when an element or layer is referred to as being "on," "adjacent to," "connected to," or "coupled to" another element or layer, it may be directly on, adjacent to, connected to, or coupled to the other element or layer, or there may be intervening elements or layers. Conversely, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are merely used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer, or part discussed below may be represented as a second element, component, region, layer, or part.

[0031] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein for convenience of description to describe the relationship of one element or feature shown in the figures to other elements or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the drawings is flipped, then the elements or features described as "under" or "beneath" or "beneath" the other elements will be oriented as "over" the other elements or features. Thus, the exemplary terms "under" and "under" may include both the upper and lower orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0032] The purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present invention. When used herein, the singular forms "a", "an" and " / the" are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, determine the presence of features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0033] In order to fully understand the present invention, the following description will provide detailed structures and steps to illustrate the technical solutions proposed by the present invention. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may also have other implementation methods.

[0034] This embodiment provides an instrument display 1 control circuit for use in an instrument display. Optionally, the instrument display can be a vehicle instrument display. As an example, the instrument display is used in a vehicle instrument display 1 control system. The instrument display 1 control system includes a cockpit host 2 and an instrument display 1. Exemplarily, the cockpit host 2 is connected to the vehicle CAN gateway 3 and is configured to detect safety messages received by the vehicle CAN gateway 3 and generate instrument signals based on the safety messages. Exemplarily, the instrument signals include an instrument video frame and an instrument indicator icon overlaid on the instrument video frame. The safety messages include fault warning messages for ABS (Anti-lock Braking System), EPS (Electronic Power Steering), EBD (Electronic Brakeforce Distribution), ESP (Electronic Stability Program), gear position, engine, transmission, airbags, tire pressure, seat belts, doors, battery, parking, and more.

[0035] This embodiment provides an instrument display screen 1 control circuit, including an icon drawing module 11, a main control module 12 and a display module 13; the icon drawing module 11 is used to connect to the cockpit host 2 and is connected to the display module 13; the main control module 12 is used to connect to the cockpit host 2 and the vehicle CAN gateway 3, and is connected to the icon drawing module 11, and is used to control the icon drawing module 11 to draw instrument indication icons based on instrument signals from the cockpit host 2 or safety message signals output by the vehicle CAN gateway 3; the display module 13 is connected to the main control module 12, and is used to display the instrument indication icons output by the icon drawing module 11 under the control of the main control module 12.

[0036] As an example, the main control module 12 enters wake-up mode when it receives a wake-up signal. Exemplarily, the wake-up signal includes a vehicle ignition signal and a network management frame. In wake-up mode, if the main control module 12 determines that the cockpit host 2 outputs an instrument signal or the vehicle CAN gateway 3 outputs a security message signal, it determines that there is a need to display an instrument indicator icon on the display module 13.

[0037] When it is determined that there is a need to display instrument indicators on the display module 13, the cockpit host 2 is first checked for malfunction. For example, the cockpit host 2 is checked for frozen instrument video frames, lost instrument video frames, abnormal instrument video frame display, or communication anomalies with the cockpit host 2. If any of these determinations are "yes," the cockpit host 2 is considered faulty. Frozen instrument video frames are determined to be real-time refreshed by checking whether the pixel data of the current instrument video frame is being refreshed. This is primarily done by detecting changes within each instrument video frame within a cycle. This requires the cockpit host 2 to coordinate pixel refreshes at one or more fixed points on the display screen of the display module 13. The refresh cycle can be every frame or a predetermined period. Frame loss and abnormal instrument video frame display are primarily determined by checking whether the timing parameters of the input instrument video frame are consistent with preset timing parameters. These preset timing parameters are stored in a preset memory and include timing parameters such as CLK, HT, HA, HSW, HFP, HBP, VT, VA, VSW, VFP, VBP, and CRC. Communication anomaly refers to the loss of I2C communication between the main control module 12 and the cockpit host 2 and the failure of communication protocol verification.

[0038] For example, when the cockpit host 2 fails, the main control module 12 controls the icon drawing module 11 to enter the simple mode, that is, cuts off the cockpit host 2 input video stream (that is, the instrument signal), controls the icon drawing module 11 to enter the internal OSD mode, and the icon drawing module 11 draws the display background as a pure black or other specified color solid color interface, and at the same time draws the instrument indicator icons required for safety display in the safety message signal and the basic requirements required for the simple mode on the display screen of the display module 13. The instrument indicator icons required for safety display include but are not limited to ABS, EPS, EBD, ESP, gear, engine, transmission, airbag, tire pressure, seat belt, door, battery and parking and other fault or indicator icons. Non-safety function related icons include time, temperature, mileage and other information. For example Figure 2 FIG. 1 shows a display diagram of the display module 13 in the simple mode. Figure 3 This is the display of the display module 13 in the normal mode when there is no fault in the cockpit host 2. It can be understood that the display content of the simple mode can be customized according to actual needs.

[0039] For example, when the cockpit host 2 is fault-free, the main control module 12 receives a valid safety message from the CAN gateway or the safety message verification fails, the control icon drawing module 11 draws the instrument indicator icon corresponding to the current safety message. At this time, the icon drawing module 11 directly performs point-to-point overlay drawing on the instrument indicator icon drawn by the cockpit host 2 on the instrument video frame at the UI layer, regardless of whether the cockpit host 2 is correctly drawn, to ensure that the driver can understand the current vehicle body fault situation in a timely and effective manner. Among them, the verification of the valid safety message includes: the cockpit host 2 performs a CRC32 check on the safety message output by the vehicle CAN gateway 3, and stores the check result in the designated check byte of the message frame. The main control module 12 performs a CRC32 check on the safety message. If the check result is consistent with the value of the designated check byte, the safety message is considered valid. When the safety message frame is lost or the check error occurs, it is an abnormal frame.

[0040] In this embodiment, the control circuit of the instrument display screen 1 includes an icon drawing module 11, a main control module 12 and a display module 13; the icon drawing module 11 is used to connect to the cockpit host 2 and is connected to the display module 13; the main control module 12 is used to connect to the cockpit host 2 and the vehicle CAN gateway 3, and is connected to the icon drawing module 11, and is used to control the icon drawing module 11 to draw instrument indication icons according to the instrument signal of the cockpit host 2 or the safety message signal output by the vehicle CAN gateway 3; the display module 13 is connected to the main control module 12, and is used to display the instrument indication icons output by the icon drawing module 11 under the control of the main control module 12, so that when a fault occurs in the cockpit host 2, the instrument indication icons are drawn and verified by the icon drawing module 11, ensuring that when a fault occurs in the cockpit host 2, the driver can timely and effectively understand the current vehicle body fault status through the instrument indication icons output by the icon drawing module 11 and the display module 13, thereby ensuring the safety and reliability of the safety display function of the instrument display screen 1.

[0041] In one embodiment, the control circuit of the instrument display screen 1 includes a deserializer 14; the input end of the deserializer 14 is connected to the cockpit host computer 2, and the output end of the deserializer 14 is connected to the icon drawing module 11 and the main control module 12. In this embodiment, the output end of the deserializer 14 is connected to the icon drawing module 11 and the main control module 12 to reduce the wiring complexity and cost of the instrument display screen 1 control circuit, improve the transmission quality of the instrument signal, and enhance the anti-interference capability of the instrument signal during transmission.

[0042] In this embodiment, a backlight driver module 15 is included; the backlight driver module 15 is connected to the main control module 12 and the display module 13, and is used to drive the display module 13 to turn on or off the backlight mode under the control of the main control module 12. In this embodiment, the backlight driver module 15 is connected to the main control module 12 and the display module 13, and is used to turn the backlight on and off under the control of the main control module 12, and to adjust the display brightness so that the display module 13 can adapt to the display effect in different brightness environments.

[0043] In one embodiment, the icon drawing module 11 includes an OSD chip 111; the OSD chip 111 is connected to the main control module 12 and the display module 13, and is used to enter the simple mode or normal mode under the control of the main control module 12, draw the instrument indication icon, and send the instrument indication icon to the display module 13 and the main control module 12.

[0044] As will be understood, the OSD chip 111 is capable of generating and displaying various characters and simple graphics on the screen. These characters and graphics are achieved through the character generator and graphics generation module within the OSD chip 111. The character generator typically stores dot matrix information for various characters and transmits this dot matrix information to the corresponding position on the screen as needed, thereby displaying the characters. When the main control module 12 detects a security message, the OSD chip 111, under the control of the main control module 12, uses the internal character generator and graphics generation module to draw instrument indicator icons and transmits these instrument indicator icons to the display module 13 and the main control module 12.

[0045] In this embodiment, the OSD chip 111 is connected to the main control module 12 and the display module 13. Under the control of the main control module 12, it enters simplified mode or normal mode, draws instrument indicator icons, and transmits these to the display module 13 and the main control module 12. Therefore, when the cockpit host computer 2 fails, the OSD chip 111 promptly draws instrument indicator icons. Even when the cockpit host computer 2 fails, the display module 13 in simplified mode can still correctly display basic safety requirement indicators and basic driving information.

[0046] In one embodiment, the icon drawing module 11 also includes an icon storage module 112; the icon storage module 112 is used to store preset indication icons; the OSD chip 111 is also connected to the icon storage module 112, and is used to send the instrument indication icon and the preset indication icon to the main control module 12, and redraw the instrument indication icon when receiving the redraw control signal of the main control module 12.

[0047] As an example, after OSD chip 111 draws an instrument indicator icon, it extracts a preset indicator icon from icon storage module 112 and sends it to main control module 12. Main control module 12 compares the instrument indicator icon drawn by OSD chip 111 with the preset annotation icon to determine whether the instrument indicator icon drawn by OSD chip 111 is correct. If the drawing is incorrect, it outputs a redraw control signal to control icon drawing module 11 to redraw the instrument indicator icon. It is understood that the main control module 12's technique of comparing the instrument indicator icon with the preset annotation icon and the OSD chip 111's technique of redrawing the instrument indicator icon are both well known to those skilled in the art.

[0048] In this embodiment, the OSD chip 111 is also connected to the icon storage module 112, and is used to send the instrument indication icon and the preset indication icon to the main control module 12. When receiving the redraw control signal from the main control module 12, the instrument indication icon is redrawn to confirm the instrument indication icon drawn by the OSD chip 111, thereby improving the accuracy of the instrument indication icon.

[0049] In this embodiment, the icon storage module 112 includes a Flash module. In this embodiment, the icon storage module 112 includes a Flash module to increase data response speed.

[0050] In one embodiment, the control circuit of the instrument display screen 1 includes a CAN module 16 ; the CAN module 16 is connected to the main control module 12 , and is used to connect to the vehicle CAN gateway 3 , filter the message signal of the vehicle CAN gateway 3 , and output a safe message signal to the main control module 12 .

[0051] In this embodiment, the CAN module 16 is connected to the main control module 12 and is used to connect to the vehicle CAN gateway 3, filter the message signal of the vehicle CAN gateway 3, and output the safe message signal to the main control module 12 to improve the signal transmission efficiency.

[0052] This embodiment provides an instrument display screen 1 , including the above-mentioned instrument display screen 1 control circuit.

[0053] This embodiment provides an instrument display screen 1 control system, including a cockpit host 2 and the above-mentioned instrument display screen 1 ; the cockpit host 2 is connected to an icon drawing module 11 .

[0054] This embodiment provides a vehicle, including a vehicle CAN gateway 3 and the above-mentioned instrument display screen 1 control system; the vehicle CAN gateway 3 is connected to the main control module 12.

[0055] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. An instrument display screen control circuit, characterized in that: Including icon drawing module, main control module and display module; The icon drawing module is used to connect to the cockpit host and is connected to the display module; The main control module is used to connect the cockpit host and the vehicle CAN gateway, and is connected to the icon drawing module, and is used to control the icon drawing module to draw the instrument indicator icon according to the instrument signal of the cockpit host or the safety message signal output by the vehicle CAN gateway; The display module is connected to the main control module and is used to display the instrument indication icon output by the icon drawing module under the control of the main control module.

2. The instrument display screen control circuit according to claim 1, characterized in that: It includes a deserializer; the input end of the deserializer is used to connect to the cockpit host, and the output end of the deserializer is connected to the icon drawing module and the main control module.

3. The instrument display screen control circuit according to claim 1, characterized in that: The instrument display screen control circuit also includes a backlight driving module; The backlight driving module is connected to the main control module and the display module, and is used to drive the display module to turn on or off the backlight mode under the control of the main control module.

4. The instrument display screen control circuit according to claim 1, characterized in that: The icon drawing module includes an OSD chip; The OSD chip is connected to the main control module and the display module, and is used to enter the simple mode or the normal mode under the control of the main control module, draw the instrument indication icon, and send the instrument indication icon to the display module and the main control module.

5. The instrument display screen control circuit according to claim 4, characterized in that: The icon drawing module also includes an icon storage module; The icon storage module is used to store preset indication icons; The OSD chip is also connected to the icon storage module, and is used to send the instrument indication icon and the preset indication icon to the main control module, and redraw the instrument indication icon when receiving the redraw control signal from the main control module.

6. The instrument display screen control circuit according to claim 5, characterized in that: The icon storage module includes a Flash module.

7. The instrument display screen control circuit according to claim 1, characterized in that: It includes a CAN module; the CAN module is connected to the main control module, used to connect to the vehicle CAN gateway, filter the message signal of the vehicle CAN gateway, and output the safety message signal to the main control module.

8. An instrument display screen, characterized in that: The device comprises an instrument display screen control circuit as described in any one of claims 1 to 7.

9. An instrument display screen control system, characterized in that: It comprises a cockpit host and the instrument display screen as claimed in claim 8; the cockpit host is connected to the icon drawing module.

10. A vehicle, characterized in that: It comprises a vehicle CAN gateway and the instrument display screen control system as claimed in claim 9; the vehicle CAN gateway is connected to the main control module.

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