Display screen device with safe instrument function

Abstract

The utility model provides a display screen device with safe instrument functions, which belongs to the field of automobile display screens and comprises a cabin area controller, an instrument control module, a display module, a sensor module and an image superposition module. The output end of the instrument control module is connected with the input end of the display module, the output end of the sensor module is connected with the input end of the instrument control module, the output end of the instrument control module is connected with the input end of the image superposition module, and the output end of the image superposition module is connected with the input end of the display module. When data transmission between the cabin area controller and the display module is abnormal, a driver is prompted, and the safety of an automobile is improved.

Description

Technical Field

[0001] The utility model belongs to the field of automobile display screens, and in particular relates to a display screen device with instrument functional safety. Background Art

[0002] With the advancement of automotive technology, domain controllers (DCs) integrating instrument clusters and central control functions are increasingly being used. Dual-screen, hard isolation, and virtual machine technologies are all being widely adopted. Under these conditions, instrument cluster black screen and crash issues are more or less a possibility, but only a matter of probability. Therefore, instrument cluster functional safety is paramount. If such issues occur, users will be left at a loss.

[0003] Chinese patent 211995456U provides an intelligent cockpit interaction device and a vehicle. The intelligent cockpit interaction device includes: a cockpit controller, a high-speed communication bus and a display device; the cockpit controller receives data information sent from the vehicle-mounted equipment based on the high-speed communication bus, and processes the data information and sends it to the display device for display; wherein the display device includes: at least one of: an entertainment screen, a secondary screen, an instrument screen and a head-up display.

[0004] The above patent receives and displays data information from the cockpit controller through a display device, but does not consider the impact of a cockpit controller failure on the display device. This will result in the driver not receiving an alarm in time when the cockpit controller fails, affecting the safety of the car. Utility Model Content

[0005] The utility model aims to provide a display screen device with instrument function safety, so as to achieve the technical purpose of reminding the driver when a fault occurs in the data transmission of the cockpit domain controller, thereby improving safety.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides a display screen device with instrument functional safety, comprising a cockpit domain controller, an instrument control module, a display module, a sensor module and an image overlay module, wherein the output end of the cockpit domain controller is connected to the input end of the instrument control module, the output end of the instrument control module is connected to the input end of the display module, the output end of the sensor module is connected to the input end of the instrument control module, the output end of the instrument control module is connected to the input end of the image overlay module, and the output end of the image overlay module is connected to the input end of the display module.

[0008] The cockpit domain controller outputs vehicle information to the instrument control module, the instrument control module outputs vehicle information to the display module, the sensor module outputs vehicle status information to the instrument controller module, the instrument control module outputs a fault signal to the image overlay module, and the image overlay module outputs image information to the display module.

[0009] The display module includes a backlight driving chip and a liquid crystal display screen.

[0010] The input end of the backlight driving chip is respectively connected to the output end of the image superposition module and the output end of the instrument control module, and the output end of the backlight driving chip is connected to the input end of the liquid crystal display screen.

[0011] The sensor module includes a vehicle speed sensor and a gear position sensor.

[0012] The vehicle speed sensor and the gear position sensor are respectively connected to the instrument control module via a CAN bus.

[0013] The cockpit domain controller is connected to the instrument control module via a deserializer.

[0014] The instrument control module is connected to the vehicle power supply via a power line.

[0015] The technical effects of the utility model are:

[0016] (1) The utility model prompts the driver when an abnormality occurs in the data transmission between the cockpit domain controller and the display module, guides the driver to correctly deal with the fault, and improves the safety of the car.

[0017] (2) The sensor module of the present invention provides the driver with basic vehicle information when a failure occurs in the cockpit domain controller of the vehicle, thereby improving the safety of the vehicle.

[0018] (3) The microcontroller in the present invention supplies power to the LCD screen, so the LCD screen can still operate normally when a cockpit domain controller fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] This manual includes the following drawings, which show the following contents:

[0020] Figure 1 This is a logic structure diagram of a display screen device with functional safety for an instrument according to the present invention;

[0021] Figure 1 The markings are: 1. Cockpit domain controller; 2. Instrument control module; 3. Display module; 4. Sensor module; 5. Image overlay module. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution of the present invention and to facilitate its implementation.

[0023] The present invention provides a display screen device with functional instrument safety, comprising a cockpit domain controller 1, an instrument control module 2, a display module 3, a sensor module 4, and an image overlay module 5. The output of the cockpit domain controller 1 is connected to the input of the instrument control module 2, which is connected to the input of the display module 3. The output of the sensor module 4 is connected to the input of the instrument control module 2, which is connected to the input of the image overlay module 5, which is connected to the input of the display module 3. The cockpit domain controller 1 outputs vehicle information to the instrument control module 2, which in turn outputs vehicle information to the display module 3. The sensor module 4 outputs vehicle status information to the instrument controller module, the instrument control module 2 outputs a fault signal to the image overlay module 5, and the image overlay module 5 outputs image information to the display module 3.

[0024] Display module 3 includes a backlight driver chip and a liquid crystal display (LCD). The input of the backlight driver chip is connected to the output of the image overlay module 5 and the output of the instrument control module 2, respectively. The output of the backlight driver chip is connected to the input of the LCD. Sensor module 4 includes a vehicle speed sensor and a gear position sensor. These sensors are each connected to the instrument control module 2 via the CAN bus. The cockpit domain controller 1 is connected to the instrument control module 2 via a deserializer. The instrument control module 2 is connected to the vehicle power supply via a power cable.

[0025] The utility model discloses a display screen device with instrument functional safety, comprising a cockpit domain controller 1, an instrument control module 2, a display module 3, a sensor module 4 and an image overlay module 5, wherein the cockpit domain controller 1 is used to transmit automobile information to the instrument control module 2, and the automobile information includes the vehicle speed, engine speed, gear position, coolant temperature, mileage and remaining fuel information of the vehicle. The cockpit domain controller 1 in the utility model adopts Qualcomm SA8155P cockpit domain controller 1; the instrument control module 2 adopts a microcontroller, which is used to detect whether the information input by the cockpit domain controller 1 is stuck or no automobile information is input; when the cockpit domain controller 1 fails and the automobile information cannot be input normally, the instrument control module 2 outputs a fault signal to the image overlay module 5, and the microcontroller in the utility model adopts S32K MCU model microcontroller; sensor module 4 uses a vehicle speed sensor and a gear sensor to collect the vehicle's driving speed and gear position. The sensor module 4 of the present invention provides the driver with basic vehicle information when the vehicle's cockpit domain controller 1 fails; the image overlay module 5 uses an image overlay chip to output preset image information to the display module 3 after receiving a fault signal. The display module 3 overlays the preset image on the liquid crystal display. The preset image display information in the present invention is "Please pull over and slow down, and put the vehicle in P gear." The image overlay chip model is AT7456E. The display module 3 includes a backlight driver chip and a liquid crystal display. The backlight driver chip is used to provide a constant current to the liquid crystal display. The liquid crystal display is used to display vehicle information. The backlight driver chip in the present invention uses the IS31BL3506A chip. The present invention prompts the driver when an abnormality occurs in the data transmission between the cockpit domain controller 1 and the display module 3, guides the driver to correctly deal with the fault, and improves the safety of the vehicle.

[0026] The output of cockpit domain controller 1 is connected to the input of a microcontroller via a deserializer. The output of the microcontroller is connected to the input of the backlight driver chip. The outputs of the vehicle speed sensor and gear position sensor are connected to the input of the microcontroller via the CAN bus. The output of the microcontroller is connected to the input of the image overlay chip, which is connected to the input of the backlight driver chip. The output of the backlight driver chip is connected to the input of the LCD. The microcontroller is connected to the vehicle power supply via a power cable, and the LCD is powered by the microcontroller. This ensures that the LCD can function normally even if cockpit domain controller 1 fails.

[0027] The working process of the display screen device with instrument functional safety in the utility model is as follows:

[0028] During normal operation, cockpit domain controller 1 inputs vehicle information to the microcontroller via a serial communication bus and then a deserializer. The microcontroller then outputs this information to display module 3, which displays the vehicle's speed, engine speed, gear position, coolant temperature, mileage, and remaining fuel. While outputting this information to display module 3, the microcontroller uses cyclic redundancy check (CRC) technology to detect whether the information input from cockpit domain controller 1 is stuck or missing. If cockpit domain controller 1 fails and cannot properly input vehicle information, instrument control module 2 outputs a fault signal to the image overlay chip. Upon receiving the fault signal, the image overlay chip outputs a preset image message to display module 3. The preset image message displayed on display module 3 reads, "Please pull over, slow down, and put the vehicle in P gear." Simultaneously, the microcontroller receives vehicle speed and gear position information from the speed sensor and gear position sensor via the CAN bus and inputs this information to display module 3, where it is displayed on the LCD screen.

[0029] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. A display screen device with functional safety for an instrument, characterized in that: It includes a cockpit domain controller, an instrument control module, a display module, a sensor module and an image overlay module. The output end of the cockpit domain controller is connected to the input end of the instrument control module, the output end of the instrument control module is connected to the input end of the display module, the output end of the sensor module is connected to the input end of the instrument control module, the output end of the instrument control module is connected to the input end of the image overlay module, and the output end of the image overlay module is connected to the input end of the display module.

2. The display screen device for instrument functional safety according to claim 1, characterized in that: The cockpit domain controller outputs vehicle information to the instrument control module, the instrument control module outputs vehicle information to the display module, the sensor module outputs vehicle status information to the instrument controller module, the instrument control module outputs a fault signal to the image overlay module, and the image overlay module outputs image information to the display module.

3. The display screen device for instrument functional safety according to claim 1, characterized in that: The display module includes a backlight driving chip and a liquid crystal display screen.

4. The display screen device for instrument functional safety according to claim 3, characterized in that: The input end of the backlight driving chip is respectively connected to the output end of the image superposition module and the output end of the instrument control module, and the output end of the backlight driving chip is connected to the input end of the liquid crystal display screen.

5. The display screen device for instrument functional safety according to claim 1, characterized in that: The sensor module includes a vehicle speed sensor and a gear position sensor.

6. The display screen device for instrument functional safety according to claim 5, characterized in that: The vehicle speed sensor and the gear position sensor are respectively connected to the instrument control module via a CAN bus.

7. The display screen device for instrument functional safety according to claim 1, characterized in that: The cockpit domain controller is connected to the instrument control module via a deserializer.

8. The display screen device for instrument functional safety according to claim 1, characterized in that: The instrument control module is connected to the vehicle power supply via a power line.

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