Vehicle-mounted display switching method and vehicle-mounted display switching system

Abstract

The invention provides a vehicle-mounted display switching method and a vehicle-mounted display switching system.The vehicle-mounted display switching method is used for a vehicle, the vehicle is provided with a first display screen and a second display screen, the first display screen is installed outside the vehicle, and the second display screen is arranged in the vehicle; the vehicle-mounted display switching method comprises the following steps: detecting the first display screen in real time; judging whether raindrops exist on the first display screen or not; if not, a rearview picture of the vehicle is displayed through the first display screen; and if yes, displaying a rear-view picture of the vehicle through the second display screen. According to the vehicle-mounted display method and the vehicle-mounted display system provided by the invention, the vehicle automatically switches the first display screen or the second display screen to display the rear-view picture of the vehicle according to whether raindrops exist on the first display screen or not, so that the driving experience and the driving safety of a driver in the driving process are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of vehicle-mounted display control, and in particular, relates to a vehicle-mounted display switching method and a vehicle-mounted display switching system. Background Art

[0002] With the popularization of the concept of smart cars, multi-screen has become the mainstream of smart cars. Since the display of the external rearview mirror is blurred on rainy days, it is necessary to switch the image displayed on the rearview mirror to the display screen inside the car. Therefore, the car rearview mirror also tends to develop into a multi-screen, that is, the reflective mirror rearview mirror on the outside of the car is replaced by the display screen inside the car.

[0003] In the multi-screen solution for vehicle rearview mirrors provided by the prior art, the image displayed on the vehicle external rearview mirror cannot be automatically switched to the vehicle internal display screen. In order to switch the image displayed on the vehicle external rearview mirror to the vehicle internal display screen, the driver needs to manually switch. Moreover, during driving, the driver manually switches the image displayed on the vehicle external rearview mirror to the vehicle internal display screen, which affects the driver's driving experience and the safety of the driver's driving process. Summary of the invention

[0004] In response to the shortcomings of the prior art, the present application provides a vehicle-mounted display switching method and a vehicle-mounted display switching system. The vehicle automatically switches the first display screen or the second display screen to display the rear view image of the vehicle according to whether there are raindrops on the first display screen, which is beneficial to improving the driver's driving experience and driving safety during driving.

[0005] In one aspect, the present application provides a vehicle display switching method, the vehicle display switching method is used for a vehicle, the vehicle has a first display screen and a second display screen, the first display screen is installed outside the vehicle, and the second display screen is arranged inside the vehicle; the vehicle display switching method comprises:

[0006] detecting the first display screen in real time; and

[0007] Determining whether raindrops exist on the first display screen;

[0008] If not, displaying a rear view image of the vehicle via the first display screen;

[0009] If so, the rear view image of the vehicle is displayed via the second display screen.

[0010] In a possible implementation, the real-time detection of the first display screen includes:

[0011] Detecting in real time whether the capacitance of the first display screen changes;

[0012] If not, a no raindrop signal is issued;

[0013] If so, a raindrop signal is issued.

[0014] In a possible implementation manner, the real-time detection of whether the capacitance of the first display screen changes includes:

[0015] Set preset signals;

[0016] Sending a first signal to the first display screen and generating a second signal;

[0017] determining a difference between the second signal and the first signal; and

[0018] Determining whether a difference between the second signal and the first signal is the same as the preset signal;

[0019] If yes, it is determined that the capacitance of the first display screen has not changed;

[0020] If not, it is determined that the capacitance of the first display screen has changed.

[0021] In a possible implementation manner, determining whether raindrops exist on the first display screen includes:

[0022] Determining whether there are raindrops on the first display screen according to the real-time detection of whether the capacitance of the first display screen changes;

[0023] If not, judging that there are no raindrops according to the raindrop-free signal;

[0024] If so, it is determined that raindrops exist according to the raindrop signal.

[0025] In a possible implementation, when determining whether raindrops exist on the first display screen, two detection modules are used to detect whether the capacitance of the first display screen changes;

[0026] If the capacitance of the first display screen detected by the two detection modules changes, it is determined that raindrops exist on the first display screen;

[0027] If less than two of the detection modules detect that the capacitance of the first display screen has changed, it is determined that there are no raindrops on the first display screen.

[0028] In a possible implementation, when determining whether raindrops are present on the first display screen, N detection modules are used to detect whether the capacitance of the first display screen changes, where N≥3, and N is an integer;

[0029] If M detection modules detect that the capacitance of the first display screen has changed, 0.5N<M≤N, and M is an integer, it is determined that raindrops exist on the first display screen;

[0030] If L detection modules detect that the capacitance of the first display screen has changed, 0≤L≤0.5N, and L is an integer, it is determined that there are no raindrops on the first display screen.

[0031] On the other hand, the present application provides a vehicle-mounted display switching system, characterized in that the vehicle-mounted display switching system is used for a vehicle, the vehicle has a first display screen and a second display screen, the first display screen is installed outside the vehicle, and the second display screen is arranged inside the vehicle; the vehicle-mounted display switching system includes:

[0032] A detection module, used for detecting the first display screen in real time; and

[0033] A controller, configured to determine whether raindrops exist on the first display screen;

[0034] If the controller determines that the result is no, the controller controls the first display screen to display a rear view image of the vehicle;

[0035] If the controller determines that the answer is yes, the controller controls the second display screen to display the rear view image of the vehicle.

[0036] In a possible implementation, the detection module includes a capacitive sensor and a signal transceiver, the capacitive sensor is communicatively connected to the signal transceiver, and the capacitive sensor is installed on the first display screen;

[0037] The signal transceiver is used to send a first signal to the capacitive sensor, and the first signal generates a second signal after passing through the first display screen; a preset signal is set, and whether the capacitance of the first display screen changes is determined based on whether the difference between the second signal and the first signal is the same as the preset signal;

[0038] If the difference between the second signal and the first signal is the same as the preset signal, the capacitance of the first display screen does not change, and the signal transceiver sends a no-raindrop signal to the controller; the controller determines that there are no raindrops on the first display screen according to the no-raindrop signal, and then controls the first display screen to display the rear-view image;

[0039] If the difference between the second signal and the first signal is different from the preset signal, the capacitance of the first display screen changes, and the signal transceiver sends a raindrop signal to the controller; the controller determines the presence of raindrops on the first display screen based on the raindrop signal, and then controls the second display screen to display the rear-view picture.

[0040] In a possible implementation, the first signal is a waveform signal, and the signal transceiver obtains a difference between the second signal and the first signal based on a comparison of the waveform data of the first signal and the waveform data of the second signal; and the preset signal is the difference between the second signal and the first signal when there are no raindrops on the first display screen.

[0041] In a possible implementation manner, the number of the detection modules is two, and the two detection modules are used to detect the first display screen in real time;

[0042] When both detection modules detect that the capacitance of the first display screen has not changed, the signal transceiver sends the no-raindrop signal to the controller; the controller determines that there are no raindrops on the first display screen according to the no-raindrop signal, and then controls the first display screen to display the rear-view image;

[0043] When one of the detection modules detects that the capacitance of the first display screen has not changed, and the other detection module detects that the capacitance of the first display screen has changed, the signal transceiver sends the no-raindrop signal to the controller; the controller determines that there are no raindrops on the first display screen according to the no-raindrop signal, and then controls the first display screen to display the rear-view image;

[0044] When both detection modules detect changes in the capacitance of the first display screen, the signal transceiver sends the raindrop signal to the controller; the controller determines the presence of raindrops on the first display screen based on the raindrop signal, and then controls the second display screen to display the rear-view image.

[0045] The vehicle-mounted display switching method and vehicle-mounted display switching system provided by the present application detect the first display screen in real time through the vehicle, and determine whether there are raindrops on the first display screen. If the vehicle determines that there are no raindrops on the first display screen, the vehicle controls the first display screen installed outside the vehicle to display the rear-view image of the vehicle. If the vehicle determines that there are raindrops on the first display screen, the vehicle controls the second display screen installed inside the vehicle to display the rear-view image of the vehicle. Thus, when the vehicle is driving, the vehicle automatically detects whether there are raindrops on the first display screen, and then controls the first display screen or the second display screen to display the rear-view image of the vehicle, that is, the vehicle automatically switches the first display screen or the second display screen to display the rear-view image of the vehicle according to whether there are raindrops on the first display screen, and the driver does not need to manually switch the control module to achieve the switching of the first display screen or the second display screen, which is conducive to improving the driver's driving experience and driving safety during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some implementation methods provided by the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0047] Figure 1 This is a process of a vehicle display switching method provided by an embodiment of the present application Figure 1 ;

[0048] Figure 2 This is a process of a vehicle display switching method provided by an embodiment of the present application Figure 2 ;

[0049] Figure 3 This is a process of a vehicle display switching method provided by an embodiment of the present application Figure 3 ;

[0050] Figure 4 This is a process of a vehicle display switching method provided by an embodiment of the present application Figure 4 ;

[0051] Figure 5 This is a process of a vehicle display switching method provided by an embodiment of the present application Figure 5 ;

[0052] Figure 6 is a schematic diagram of a vehicle display switching system provided by an embodiment of the present application;

[0053] Figure 7 is a front view of a first display screen provided by an embodiment of the present application;

[0054] Figure 8 is a control logic diagram of a vehicle display switching system provided by an embodiment of the present application;

[0055] Fig. 9 A plurality of waveform diagrams of a first signal provided in an embodiment of the present application

[0056] Fig.10 It is a front view of another first display screen provided in an embodiment of the present application. DETAILED DESCRIPTION

[0057] The technical solution of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described implementation methods are only part of the implementation methods of the present application, rather than all the implementation methods. Based on the implementation methods in the present application, all other implementation methods obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0058] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The directional terms mentioned in the description of the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "top", "side", "bottom", "top wall", "side wall", "bottom wall", "inner side wall", "outer side wall", "length direction", "width direction", "height direction", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, for example, "first", "second", "third", "fourth", etc., are only used to distinguish the objects described and do not have any order or technical meaning. In the description of the present application, the "connection" and "connection" involved, if not otherwise specified, include direct connection (connection) and indirect connection (connection).

[0059] See also Figure 1 , Figure 1 This is a process of a vehicle display switching method provided by an embodiment of the present application Figure 1 .

[0060] The vehicle-mounted display method provided in the present application is applied to a multi-screen vehicle, that is, the vehicle to which the vehicle-mounted display switching method is applied has a first display screen and a second display screen, the first display screen is installed outside the vehicle, and the second display screen is installed inside the vehicle, and both the first display screen and the second display screen are used to display a rear-view image of the vehicle.

[0061] The vehicle-mounted display method provided by the present application comprises the following steps:

[0062] S1: Real-time detection of the first display screen. Specifically, the vehicle detects the first display screen in real time through a detection module.

[0063] S2: Determine whether there are raindrops on the first display screen. Specifically, the vehicle determines whether there are raindrops on the first display screen through a controller.

[0064] If not, the rear view picture of the vehicle is displayed through the first display screen. Specifically, if the controller of the vehicle determines that there are no raindrops on the first display screen, the controller of the vehicle controls the first display screen to display the rear view picture of the vehicle.

[0065] If yes, the rear view picture of the vehicle is displayed on the second display screen. Specifically, if the controller of the vehicle determines that there are raindrops on the first display screen, the controller of the vehicle controls the second display screen to display the rear view picture of the vehicle.

[0066] The vehicle display switching method provided by the present application detects the first display screen in real time through the detection module of the vehicle, and determines whether there are raindrops on the first display screen through the controller of the vehicle. If the controller of the vehicle determines that there are no raindrops on the first display screen, the first display screen installed on the outside of the vehicle is controlled by the controller of the vehicle to display the rear view picture of the vehicle. If the controller of the vehicle determines that there are raindrops on the first display screen, the second display screen installed inside the vehicle is controlled by the controller of the vehicle to display the rear view picture of the vehicle. Thus, when the vehicle is driving, the vehicle can automatically detect whether there are raindrops on the first display screen, and control the first display screen or the second display screen to display the rear view picture of the vehicle, that is, the vehicle automatically switches the first display screen or the second display screen to display the rear view picture of the vehicle according to whether there are raindrops on the first display screen, without the driver manually switching the control module to achieve the switching of the first display screen or the second display screen, which is conducive to improving the driving experience and driving safety of the driver during driving.

[0067] See also Figure 2 , Figure 2 This is a process of a vehicle display switching method provided by an embodiment of the present application Figure 2 .

[0068] In a specific embodiment, real-time detection of the first display screen includes the following steps:

[0069] S11: Detect in real time whether the capacitance of the first display screen changes. Specifically, the vehicle detects in real time whether the capacitance of the first display screen changes through a detection module.

[0070] If not, a no raindrop signal is sent. Specifically, if the detection module of the vehicle determines that there are no raindrops on the first display screen, the detection module of the vehicle sends a no raindrop signal to the controller of the vehicle, and the controller of the vehicle controls the first display screen to display the rear view picture of the vehicle.

[0071] If yes, a raindrop signal is sent. Specifically, if the detection module of the vehicle determines that there are raindrops on the first display screen, the detection module of the vehicle sends a raindrop signal to the controller of the vehicle, and the controller of the vehicle controls the first display screen to display the rear view picture of the vehicle.

[0072] The vehicle-mounted display switching method provided by the present application does not change the capacitance of the first display screen when no raindrops fall on the first display screen, but changes when raindrops fall on the first display screen. The detection module of the vehicle detects in real time whether the capacitance of the first display screen changes, which is beneficial to improving the accuracy of the vehicle's detection module in real-time detection of the first display screen, thereby improving the accuracy of the vehicle's judgment of whether there are raindrops on the first display screen. The driver does not need to judge whether there are raindrops on the first display screen by himself, nor does the driver need to manually control the display switching between the first display screen and the second display screen, which makes it easy for the driver to observe the rear-view picture of the vehicle, and is beneficial to improving the driver's driving experience and driving safety during driving.

[0073] See also Figure 3 , Figure 3 This is a process of a vehicle display switching method provided by an embodiment of the present application Figure 3 .

[0074] In a specific embodiment, real-time detection of whether the capacitance of the first display screen changes includes the following steps:

[0075] S111: Setting a preset signal. Specifically, a preset signal is set in the signal transceiver of the vehicle's detection module, and the preset signal is a signal difference between a first signal and a second signal formed by the first signal passing through the capacitive sensor of the vehicle's detection module and the first display screen (in a rainless state).

[0076] S112: Send a first signal to the first display screen and generate a second signal. Specifically, the signal transceiver of the vehicle's detection module sends the first signal to the capacitive sensor of the vehicle's detection module and the first display screen in real time and generates a second signal. The first signal is a waveform signal, and the waveform signal includes but is not limited to a square wave, a rectangular wave, a sine wave, a triangular wave, etc., and the present application does not limit this. Among them, the preset signal is the waveform difference between the waveform of the first signal and the waveform of the second signal formed by the first signal passing through the capacitive sensor of the vehicle's detection module and the first display screen.

[0077] S113: Determine the difference between the second signal and the first signal. Specifically, the signal transceiver of the detection module of the vehicle determines the waveform difference between the waveform of the second signal and the waveform of the first signal.

[0078] S114: Determine whether the difference between the second signal and the first signal is the same as the preset signal. Specifically, the signal transceiver of the detection module of the vehicle determines whether the waveform difference between the waveform of the second signal and the waveform of the first signal is the same as the preset signal. Among them, in the process of comparing the waveform difference between the waveform of the second signal and the waveform of the first signal, at least it includes comparing the waveform difference between the waveform of the second signal and the waveform of the first signal with one or more of the amplitude difference, frequency difference, and shape difference of the preset signal, and the present application does not limit this.

[0079] If the vehicle determines that the difference between the second signal and the first signal is the same as the preset signal, it is determined that the capacitance of the first display screen has not changed. Specifically, if the signal transceiver of the detection module of the vehicle determines that the waveform difference between the waveform of the second signal and the waveform of the first signal is the same as the preset signal, it is determined that the capacitance of the first display screen has not changed, that is, there are no raindrops on the first display screen.

[0080] If the vehicle determines that the difference between the second signal and the first signal is different from the preset signal, it is determined that the capacitance of the first display screen has changed. Specifically, if the signal transceiver of the detection module of the vehicle determines that the waveform difference between the waveform of the second signal and the waveform of the first signal is different from the preset signal, it is determined that the capacitance of the first display screen has changed, that is, raindrops exist on the first display screen.

[0081] The vehicle display switching method provided by the present application, since the capacitance of the first display screen will not change when there are no raindrops falling on the first display screen, the capacitance of the first display screen will change when there are raindrops falling on the first display screen, the signal transceiver of the vehicle's detection module sends the first signal to the capacitance sensor of the vehicle's detection module and the first display screen in real time and generates a second signal, and at the same time, the signal transceiver of the vehicle's detection module compares the signal difference between the second signal and the first signal with the preset signal in real time, so that the vehicle's detection module detects in real time whether the capacitance of the first display screen has changed. On the one hand, it is conducive to improving the accuracy of the vehicle's detection module in real-time detection of the first display screen, thereby improving the accuracy of the vehicle's judgment of whether there are raindrops on the first display screen. On the other hand, there is no need for the driver to judge whether there are raindrops on the first display screen by himself, nor is there a need for the driver to manually control the display switching between the first display screen and the second display screen, which is convenient for the driver to observe the rear view screen of the vehicle, and is conducive to improving the driver's driving experience and driving safety during driving.

[0082] See also Figure 4 , Figure 4 This is a process of a vehicle display switching method provided by an embodiment of the present application Figure 4 .

[0083] In a specific embodiment, determining whether raindrops exist on the first display screen includes:

[0084] S21: Determine whether there are raindrops on the first display screen according to whether the capacitance of the first display screen changes in real time. Specifically, the controller of the vehicle determines whether there are raindrops on the first display screen according to whether the capacitance of the first display screen changes in real time. When the capacitance of the first display screen does not change, the signal transceiver of the control module of the vehicle sends a raindrop-free signal to the controller of the vehicle. When the capacitance of the first display screen changes, the signal transceiver of the control module of the vehicle sends a raindrop-present signal to the controller of the vehicle.

[0085] If not, it is determined that there are no raindrops according to the no raindrop signal. Specifically, if the vehicle detects in real time that the capacitance of the first display screen has not changed, the signal transceiver of the control module of the vehicle sends a no raindrop signal to the controller of the vehicle, and the controller of the vehicle determines that there are no raindrops according to the no raindrop signal, and then controls the first display screen outside the vehicle to display the rear view of the vehicle.

[0086] If yes, the presence of raindrops is determined according to the raindrop signal. Specifically, if the vehicle detects in real time that the capacitance of the first display screen has changed, the signal transceiver of the control module of the vehicle sends a raindrop signal to the controller of the vehicle, and the controller of the vehicle determines the presence of raindrops according to the raindrop signal, and then controls the second display screen in the vehicle to display the rear view of the vehicle.

[0087] The vehicle-mounted display switching method provided by the present application determines whether there are raindrops on the first display screen through the signal transceiver of the vehicle's control module and feeds back a raindrop signal or a no raindrop signal to the vehicle's controller. The controller controls the first display screen or the second display screen to display the vehicle's rear-view picture according to the raindrop signal or the no raindrop signal fed back by the signal transceiver of the vehicle's control module. The vehicle can automatically switch the first display screen or the second display screen to display the vehicle's rear-view picture, without the driver having to manually switch the control module to switch the first display screen or the second display screen, which makes it convenient for the driver to observe the vehicle's rear-view picture and is beneficial to improving the driver's driving experience and driving safety during driving.

[0088] See also Figure 5 , Figure 5 This is a process of a vehicle display switching method provided by an embodiment of the present application Figure 5 .

[0089] In a specific embodiment, when determining whether there are raindrops on the first display screen, two detection modules are used to detect whether the capacitance of the first display screen has changed. Specifically, two signal transceivers of the two detection modules of the vehicle send two first signals to the capacitance sensor of the detection module of the vehicle and the first display screen in real time and generate two second signals. At the same time, the signal transceiver of the detection module of the vehicle compares the signal difference between the two second signals and the two first signals with a preset signal in real time, so that the detection module of the vehicle detects whether the capacitance of the first display screen has changed in real time.

[0090] In other words, determining whether there are raindrops on the first display screen includes:

[0091] S22: Detecting whether the capacitance of the first display screen changes by using two detection modules to determine whether there are raindrops on the first display screen.

[0092] If the capacitance of the first display screen detected by the two detection modules changes, it is determined that there are raindrops on the first display screen. Specifically, the signal transceiver of the vehicle's detection module compares the signal difference between the two second signals and the two first signals in real time and finds that they are different from the preset signal, then the two signal transceivers of the two detection modules of the vehicle both feedback raindrop signals to the vehicle controller, and the vehicle controller controls the second display screen in the vehicle to display the rear view of the vehicle.

[0093] If less than two detection modules detect that the capacitance of the first display screen has changed, it is determined that there are no raindrops on the first display screen. Specifically, in one case, the signal transceiver of the detection module of the vehicle compares the signal difference between the two second signals and the two first signals with the preset signal in real time, wherein the signal difference between one second signal and one first signal is the same as the preset signal, and the signal difference between another second signal and another first signal is different from the preset signal, one of the two detection modules of the vehicle feeds back a raindrop signal to the controller of the vehicle, and the other of the two detection modules of the vehicle feeds back a raindrop-free signal to the controller of the vehicle, and the controller of the vehicle controls the first display screen in the vehicle to display the rear view of the vehicle.

[0094] In another case, the signal transceiver of the vehicle's detection module compares the signal difference between the two second signals and the two first signals with a preset signal in real time, and the signal difference between the two second signals and the two first signals is the same as the preset signal. The two signal transceivers of the two detection modules of the vehicle both feedback a no raindrop signal to the vehicle's controller, and the vehicle's controller controls the first display screen in the vehicle to display the rear view of the vehicle.

[0095] The vehicle display switching method provided by the present application detects whether the capacitance of the first display screen changes through two detection modules, and then determines whether there are raindrops on the first display screen, that is, the detection module is designed redundantly. Only when the two detection modules simultaneously detect the presence of raindrops on the first display screen, the controller of the vehicle controls the second display screen in the vehicle to display the rear view picture of the vehicle. Otherwise, the controller controls the first display screen of the vehicle to display the rear view picture of the vehicle. In this way, the accuracy of the controller controlling the switching of the first display screen or the second display screen due to misdetection of a detection module can be avoided, which is conducive to improving the accuracy of the vehicle controlling the switching of the first display screen or the second display screen, making it easier for the driver to observe the rear view picture of the vehicle, thereby improving the driving safety of the driver during driving.

[0096] In another specific embodiment, when the vehicle determines whether there are raindrops on the first display screen, N detection modules are used to detect whether the capacitance of the first display screen has changed, where N ≥ 3, and N is an integer. Specifically, the N signal transceivers of the N detection modules of the vehicle send N first signals to the capacitance sensors of the detection modules of the vehicle and the first display screen in real time and generate N second signals. At the same time, the signal transceivers of the detection modules of the vehicle compare the signal differences between the N second signals and the N first signals with a preset signal in real time, so that the detection modules of the vehicle detect in real time whether the capacitance of the first display screen has changed.

[0097] In other words, determining whether there are raindrops on the first display screen includes: detecting, by means of N detection modules, whether there is a change in the capacitance of the first display screen.

[0098] If the M detection modules of the vehicle detect that the capacitance of the first display screen has changed, 0.5N<M≤N, and M is an integer, it is determined that there are raindrops on the first display screen. Specifically, if the M detection modules detect that the capacitance of the first display screen has changed, 0.5N<M≤N, and M is an integer, the M signal transceivers of the N detection modules of the vehicle feedback a raindrop signal to the controller of the vehicle, and the (MN) signal transceivers of the N detection modules of the vehicle feedback a no raindrop signal to the controller of the vehicle, it is determined that there are raindrops on the first display screen, and the controller of the vehicle controls the second display screen in the vehicle to display the rear view of the vehicle. In other words, if more than half of the detection modules of the M detection modules detect that the capacitance of the first display screen has changed, it is determined that there are raindrops on the first display screen, and the controller of the vehicle controls the second display screen in the vehicle to display the rear view of the vehicle.

[0099] If the L detection modules of the vehicle detect that the capacitance of the first display screen has changed, 0≤L≤0.5N, and L is an integer, it is determined that there are no raindrops on the first display screen. Specifically, if the L detection modules detect that the capacitance of the first display screen has changed, 0≤L≤0.5N, and L is an integer, the L signal transceivers of the N detection modules of the vehicle feedback a raindrop signal to the controller of the vehicle, and the (ML) signal transceivers of the N detection modules of the vehicle feedback a no raindrop signal to the controller of the vehicle, it is determined that there are no raindrops on the first display screen, and the controller of the vehicle controls the second display screen in the vehicle to display the rear view of the vehicle. In other words, if more than half of the detection modules of the M detection modules detect that the capacitance of the first display screen remains unchanged, it is determined that there are no raindrops on the first display screen, and the controller of the vehicle controls the first display screen outside the vehicle to display the rear view of the vehicle.

[0100] The vehicle display switching method provided by the present application detects whether the capacitance of the first display screen has changed through 3 or more detection modules, and then determines whether there are raindrops on the first display screen, that is, the detection module is designed redundantly. Only when more than half of the detection modules simultaneously detect the presence of raindrops on the first display screen, the controller of the vehicle controls the second display screen in the vehicle to display the rear view picture of the vehicle. Otherwise, the controller controls the first display screen of the vehicle to display the rear view picture of the vehicle. In this way, the accuracy of the controller controlling the switching of the first display screen or the second display screen due to misdetection of multiple detection modules can be avoided, which is conducive to improving the accuracy of the vehicle controlling the switching of the first display screen or the second display screen, facilitating the driver to observe the rear view picture of the vehicle, and thus improving the driving safety of the driver during driving.

[0101] Exemplarily, when the vehicle determines whether there are raindrops on the first display screen, it detects whether the capacitance of the first display screen has changed through five detection modules. The five signal transceivers of the five detection modules of the vehicle send five first signals to the capacitance sensor of the detection module of the vehicle and the first display screen in real time and generate five second signals. At the same time, the signal transceivers of the detection module of the vehicle compare the signal difference between the five second signals and the five first signals with a preset signal in real time, so that the detection module of the vehicle detects whether the capacitance of the first display screen has changed in real time.

[0102] If the three detection modules of the vehicle detect that the capacitance of the first display screen has changed, it is determined that there are raindrops on the first display screen. Specifically, if the three detection modules detect that the capacitance of the first display screen has changed, three signal transceivers among the five detection modules of the vehicle feedback a raindrop signal to the controller of the vehicle, and two signal transceivers among the five detection modules of the vehicle feedback a no raindrop signal to the controller of the vehicle, it is determined that there are raindrops on the first display screen, and the controller of the vehicle controls the second display screen in the vehicle to display the rear view of the vehicle. In other words, if more than half of the detection modules among the five detection modules detect that the capacitance of the first display screen has changed, it is determined that there are raindrops on the first display screen, and the controller of the vehicle controls the second display screen in the vehicle to display the rear view of the vehicle.

[0103] If the two detection modules of the vehicle detect that the capacitance of the first display screen has changed, it is determined that there are no raindrops on the first display screen. Specifically, if the two detection modules detect that the capacitance of the first display screen has changed, two of the five detection modules of the vehicle feedback a raindrop signal to the vehicle's controller, and three of the five detection modules of the vehicle feedback a no raindrop signal to the vehicle's controller, it is determined that there are no raindrops on the first display screen, and the vehicle's controller controls the second display screen in the vehicle to display the rear view of the vehicle. In other words, if more than half of the five detection modules detect that the capacitance of the first display screen remains unchanged, it is determined that there are no raindrops on the first display screen, and the vehicle's controller controls the first display screen outside the vehicle to display the rear view of the vehicle.

[0104] See also Figure 1 and Figure 6 , Figure 6 It is a schematic diagram of a vehicle display switching system provided in one embodiment of the present application.

[0105] In one embodiment, the present application provides a vehicle-mounted display switching system, which is used for a vehicle, wherein the vehicle has a first display screen 10 and a second display screen 20, wherein the first display screen 10 is installed outside the vehicle, and the second display screen 20 is arranged inside the vehicle. The vehicle-mounted display switching system includes a detection module 30 and a controller 40. The detection module 30 is installed on the first display screen 10, and the detection module 30 is used to detect the first display screen 10 in real time. The controller 40 is used to determine whether there are raindrops on the first display screen 10. If the controller 40 determines that no, that is, the controller 40 determines that there are no raindrops on the first display screen 10, the controller 40 controls the first display screen 10 to display the rear view picture of the vehicle. If the controller 40 determines that yes, that is, the controller 40 determines that there are no raindrops on the first display screen 10, the controller 40 controls the second display screen 20 to display the rear view picture of the vehicle.

[0106] The vehicle display switching system provided by the present application detects the first display screen 10 in real time through the detection module 30 of the vehicle, and determines whether there are raindrops on the first display screen 10 through the controller 40 of the vehicle. If the controller 40 of the vehicle determines that there are no raindrops on the first display screen 10, the first display screen 10 installed on the outside of the vehicle is controlled by the controller 40 of the vehicle to display the rear view picture of the vehicle. If the controller 40 of the vehicle determines that there are raindrops on the first display screen 10, the second display screen 20 installed inside the vehicle is controlled by the controller 40 of the vehicle to display the rear view picture of the vehicle. Thus, when the vehicle is driving, the vehicle can automatically detect whether there are raindrops on the first display screen 10, and control the first display screen 10 or the second display screen 20 to display the rear view picture of the vehicle, that is, the vehicle automatically switches the first display screen 10 or the second display screen 20 to display the rear view picture of the vehicle according to whether there are raindrops on the first display screen 10, without the driver manually switching the control module to realize the switching of the first display screen 10 or the second display screen 20, which is conducive to improving the driving experience and driving safety of the driver during driving.

[0107] See also Figure 6 and Figure 7 , Figure 7 It is a front view of a first display screen provided in one embodiment of the present application.

[0108] In a specific embodiment, the first display screen 10 includes a first area 10a and a second area 10b, and the first area 10a is arranged around the second area 10b. The second area 10b is a visible area (AA area), and the detection module 30 is installed in the first area 10a (non-AA area). It can be understood that in some other embodiments, the detection module 30 can be installed in the second area 10b (AA area), and the present application does not limit this.

[0109] See also Figure 6 and Figure 7In one embodiment, the vehicle display switching system further includes a camera module 50, which is used to obtain a rear view image of the vehicle. The camera module 50 is connected to the first display screen 10 outside the vehicle in communication, and the rear view image of the vehicle obtained by the camera module 50 can be transmitted to the first display screen 10 for display. The camera module 50 is also connected to the second display screen 20 inside the vehicle in communication, and the rear view image of the vehicle obtained by the camera module 50 can be transmitted to the second display screen 20 for display. The vehicle detection module 30 performs real-time detection on the first display screen 10, and determines whether there are raindrops on the first display screen 10 through the vehicle controller 40. If the vehicle controller 40 determines that there are no raindrops on the first display screen 10, the vehicle controller 40 controls the first display screen 10 installed outside the vehicle to display the rear view image of the vehicle obtained by the camera module 50. If the vehicle controller 40 determines that there are raindrops on the first display screen 10, the vehicle controller 40 controls the second display screen 20 installed inside the vehicle to display the rear view image of the vehicle obtained by the camera module 50.

[0110] See also Figure 6 In one embodiment, the vehicle display switching system further includes a voice module 60, which is used to switch the first display screen 10 or the second display screen 20 to send a voice message when the controller 40 switches, so as to remind the driver that the first display screen 10 or the second display screen 20 is currently displaying the rear view image of the vehicle. The voice module 60 is in communication connection with the controller 40. When the controller 40 controls the first display screen 10 to display the rear view image of the vehicle, it simultaneously sends a command to the voice module 60, and causes the voice module 60 to send a first prompt voice, so as to remind the driver that the first display screen 10 is currently displaying the rear view image of the vehicle. When the controller 40 controls the second display screen 20 to display the rear view image of the vehicle, it simultaneously sends a command to the voice module 60, and causes the voice module 60 to send a second prompt voice, so as to remind the driver that the second display screen 20 is currently displaying the rear view image of the vehicle.

[0111] See also Figure 6 and Figure 7In a specific embodiment, the detection module 30 includes a capacitive sensor 31 and a signal transceiver 32, the capacitive sensor 31 is communicatively connected to the signal transceiver 32, and the capacitive sensor 31 is installed on the first display screen 10. The signal transceiver 32 is used to send a first signal to the capacitive sensor 31, and the first signal generates a second signal after passing through the capacitive sensor 31 and the first display screen 10. A preset signal is set in the signal transceiver 32, and the signal transceiver 32 determines whether the capacitance of the first display screen 10 has changed according to whether the difference between the second signal and the first signal is the same as the preset signal. If the difference between the second signal and the first signal is the same as the preset signal, the capacitance of the first display screen 10 has not changed, and the signal transceiver 32 sends a no raindrop signal to the controller 40. The controller 40 determines that there are no raindrops on the first display screen 10 according to the no raindrop signal, and then controls the first display screen 10 to display the rear view picture. If the difference between the second signal and the first signal is different from the preset signal, the capacitance of the first display screen 10 changes, and the signal transceiver 32 sends a raindrop signal to the controller 40. The controller 40 determines that there are raindrops on the first display screen 10 based on the raindrop signal, and then controls the second display screen 20 to display the rear view picture.

[0112] See also Figure 6 and Figure 7 In this embodiment, the capacitive sensor 31 is connected to the signal transceiver 32 through a signal transmission line 33. The signal transmission line 33 includes a data transmission line 331 and a data receiving line 332. The signal transceiver 32 sends a first signal to the capacitive sensor 31 through the data transmission line 331. The first signal forms a second signal after passing through the capacitive sensor 31 and the first display screen 10. The second signal returns to the signal transceiver 32 through the data receiving line 332. The detection module 30 analyzes the signal difference between the second signal and the first signal and compares it with the preset signal. The signal transceiver 32 compares the signal difference between the second signal and the first signal and whether it is the same as the preset signal, and then feeds back a raindrop signal or a raindrop-free signal to the controller 40, so that the controller 40 controls the first display screen 10 or the second display screen 20 to display the rear view of the vehicle.

[0113] See also Figures 6 to 8 , Figure 8 This is a control logic diagram of a vehicle display switching system provided in one embodiment of the present application.

[0114] In this embodiment, a first driving circuit 11 is provided in the first display screen 10, and the signal transceiver 32 is integrated in the first driving circuit 11. The first driving circuit 11 is electrically connected to the controller 40, so that the controller 40 controls the display of the first display screen 10 by controlling the first driving circuit 11. A second driving circuit 21 is provided in the second display screen 20, and the second driving circuit 21 is electrically connected to the controller 40, so that the controller 40 controls the display of the second display screen 20 by controlling the second driving circuit 21.

[0115] When the signal difference between the second signal and the first signal is the same as the preset signal, the signal transceiver 32 feeds back a no-raindrop signal to the controller 40, and the controller 40 controls the first display screen 10 outside the vehicle to display the rear view of the vehicle by controlling the first drive circuit 11. When the second signal is different from the first signal, the signal transceiver 32 feeds back a raindrop signal to the controller 40, and the controller 40 controls the second display screen 20 inside the vehicle to display the rear view of the vehicle by controlling the second drive circuit 21.

[0116] See also Figures 6 to 9 , Fig. 9 These are multiple waveform diagrams of a first signal provided in an embodiment of the present application.

[0117] In a specific embodiment, the first signal is a waveform signal, and the waveform signal includes but is not limited to a square wave, a sawtooth wave, a sine wave, a triangle wave, etc. The signal transceiver 32 sends the first signal to the capacitive sensor 31, and the signal transceiver 32 compares the waveform data of the first signal with the waveform data of the second signal to obtain the difference between the second signal and the first signal. The preset signal is the difference between the second signal and the first signal when there are no raindrops on the first display screen 10.

[0118] Since the capacitance of the first display screen 10 does not change when no raindrops fall on the first display screen 10, the capacitance of the first display screen 10 will change when raindrops fall on the first display screen 10. Therefore, the signal transceiver 32 determines whether the waveform difference between the waveform of the second signal and the waveform of the first signal is the same as the preset signal, and can determine whether the capacitance of the first display screen 10 has changed, and then determine whether there are raindrops on the first display screen 10. Among them, in the process of comparing the waveform difference between the waveform of the second signal and the waveform of the first signal, at least it includes comparing the waveform difference between the waveform of the second signal and the waveform of the first signal with one or more of the amplitude difference, frequency difference, and shape difference of the preset signal, and the present application does not limit this.

[0119] See also Figures 6 to 10 , Fig.10 It is a front view of another first display screen provided in an embodiment of the present application.

[0120] In one embodiment, the number of the detection modules 30 is two, and both detection modules 30 are used to detect the first display screen 10 in real time. When both detection modules 30 detect that the capacitance of the first display screen 10 has not changed, the signal transceiver 32 sends a no-raindrop signal to the controller 40. The controller 40 determines that there are no raindrops on the first display screen 10 according to the no-raindrop signal, and then controls the first display screen 10 to display the rear-view picture. When one detection module 30 detects that the capacitance of the first display screen 10 has not changed, and the other detection module 30 detects that the capacitance of the first display screen 10 has changed, the signal transceiver 32 sends a no-raindrop signal to the controller 40. The controller 40 determines that there are no raindrops on the first display screen 10 according to the no-raindrop signal, and then controls the first display screen 10 to display the rear-view picture. When both detection modules 30 detect that the capacitance of the first display screen 10 has changed, the signal transceiver 32 sends a raindrop signal to the controller 40. The controller 40 determines that there are raindrops on the first display screen 10 according to the raindrop signal, and then controls the second display screen 20 to display the rear-view picture. The two signal transceivers 32 of the two detection modules 30 may be integrated into one structure, or the two signal transceivers 32 of the two detection modules 30 may be two dispersedly arranged structures, which is not limited in the present application.

[0121] The vehicle-mounted display switching system provided by the present application detects whether the capacitance of the first display screen 10 has changed through two detection modules 30, and then determines whether there are raindrops on the first display screen 10, that is, the detection module 30 is redundantly designed. Only when the two detection modules 30 simultaneously detect the presence of raindrops on the first display screen 10, the controller 40 of the vehicle controls the second display screen 20 in the vehicle to display the rear view picture of the vehicle. Otherwise, the controller 40 controls the first display screen 10 of the vehicle to display the rear view picture of the vehicle. In this way, the accuracy of the controller 40 controlling the switching of the first display screen 10 or the second display screen 20 due to a false detection of a detection module 30 can be avoided, which is conducive to improving the accuracy of the vehicle controlling the switching of the first display screen 10 or the second display screen 20, facilitating the driver to observe the rear view picture of the vehicle, and thus improving the driving safety of the driver during driving.

[0122] See also Figures 6 to 10 In one embodiment, the number of the detection modules 30 is N, and the N detection modules 30 are all used to detect the first display screen 10 in real time. The vehicle detects whether the capacitance of the first display screen 10 changes through the N detection modules 30, where N≥3 and N is an integer.

[0123] If the M detection modules 30 detect that the capacitance of the first display screen 10 has changed, 0.5N<M≤N, and M is an integer, the M signal transceivers 32 in the N detection modules 30 feedback a raindrop signal to the controller 40, and (MN) signal transceivers 32 in the N detection modules 30 feedback a raindrop-free signal to the controller 40. The controller 40 determines that there are raindrops on the first display screen 10 according to the raindrop signal, and then controls the second display screen 20 to display the rear view picture. In other words, if more than half of the detection modules 30 in the M detection modules 30 detect that the capacitance of the first display screen 10 has changed, it is determined that there are raindrops on the first display screen 10, and the controller 40 of the vehicle controls the second display screen 20 in the vehicle to display the rear view picture of the vehicle.

[0124] If L detection modules 30 detect that the capacitance of the first display screen 10 has changed, 0≤L≤0.5N, and L is an integer, L signal transceivers 32 in N detection modules 30 feedback a raindrop signal to the controller 40, and (ML) signal transceivers 32 in N detection modules 30 feedback a raindrop-free signal to the controller 40. The controller 40 determines that there are no raindrops on the first display screen 10 according to the raindrop-free signal, and then controls the first display screen 10 to display the rear-view picture. In other words, if more than half of the detection modules 30 in the M detection modules 30 detect that the capacitance of the first display screen 10 remains unchanged, it is determined that there are no raindrops on the first display screen 10, and the controller 40 of the vehicle controls the first display screen 10 outside the vehicle to display the rear-view picture of the vehicle. Among them, the M signal transceivers 32 of the M detection modules 30 can be integrated into a single structure, and the M signal transceivers 32 of the M detection modules 30 can be a structure of 5 dispersed arrangements, which is not limited in this application.

[0125] The vehicle display switching method provided in this embodiment detects whether the capacitance of the first display screen 10 has changed through three or more detection modules 30, and then determines whether there are raindrops on the first display screen 10, that is, the detection module 30 is redundantly designed. Only when more than half of the detection modules 30 simultaneously detect the presence of raindrops on the first display screen 10, the controller 40 of the vehicle controls the second display screen 20 in the vehicle to display the rear view picture of the vehicle. Otherwise, the controller 40 controls the first display screen 10 of the vehicle to display the rear view picture of the vehicle. In this way, the accuracy of the controller 40 controlling the switching of the first display screen 10 or the second display screen 20 due to misdetection of multiple detection modules 30 can be avoided, which is conducive to improving the accuracy of the vehicle controlling the switching of the first display screen 10 or the second display screen 20, facilitating the driver to observe the rear view picture of the vehicle, and thus improving the driving safety of the driver during driving.

[0126] Exemplarily, when the vehicle determines whether there are raindrops on the first display screen 10, the five detection modules 30 are used to detect whether the capacitance of the first display screen 10 has changed. The five signal transceivers 32 of the five detection modules 30 of the vehicle send five first signals to the capacitance sensor 31 of the detection module 30 of the vehicle and the first display screen 10 in real time and generate five second signals. At the same time, the signal transceivers 32 of the detection module 30 of the vehicle compare the signal difference between the five second signals and the five first signals with the preset signal in real time, so that the detection module 30 of the vehicle detects whether the capacitance of the first display screen 10 has changed in real time.

[0127] If the three detection modules 30 of the vehicle detect that the capacitance of the first display screen 10 has changed, it is determined that there are raindrops on the first display screen 10. Specifically, if the three detection modules 30 detect that the capacitance of the first display screen 10 has changed, three signal transceivers 32 of the five detection modules 30 of the vehicle feedback a raindrop signal to the controller 40 of the vehicle, and two signal transceivers 32 of the five detection modules 30 of the vehicle feedback a raindrop-free signal to the controller 40 of the vehicle, it is determined that there are raindrops on the first display screen 10, and the controller 40 of the vehicle controls the second display screen 20 in the vehicle to display the rear view of the vehicle. In other words, if more than half of the detection modules 30 of the five detection modules 30 detect that the capacitance of the first display screen 10 has changed, it is determined that there are raindrops on the first display screen 10, and the controller 40 of the vehicle controls the second display screen 20 in the vehicle to display the rear view of the vehicle.

[0128] If the two detection modules 30 of the vehicle detect that the capacitance of the first display screen 10 has changed, it is determined that there are no raindrops on the first display screen 10. Specifically, if the two detection modules 30 detect that the capacitance of the first display screen 10 has changed, two signal transceivers 32 of the five detection modules 30 of the vehicle feedback a raindrop signal to the controller 40 of the vehicle, and three signal transceivers 32 of the five detection modules 30 of the vehicle feedback a raindrop-free signal to the controller 40 of the vehicle, it is determined that there are no raindrops on the first display screen 10, and the controller 40 of the vehicle controls the second display screen 20 in the vehicle to display the rear view of the vehicle. In other words, if more than half of the detection modules 30 of the five detection modules 30 detect that the capacitance of the first display screen 10 remains unchanged, it is determined that there are no raindrops on the first display screen 10, and the controller 40 of the vehicle controls the first display screen 10 outside the vehicle to display the rear view of the vehicle.

[0129] The above are some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A vehicle display switching method, characterized in that: The vehicle-mounted display switching method is used for a vehicle, wherein the vehicle has a first display screen and a second display screen, wherein the first display screen is installed outside the vehicle, and the second display screen is arranged inside the vehicle; The vehicle-mounted display switching method comprises: detecting the first display screen in real time; and Determining whether raindrops exist on the first display screen; If not, displaying a rear view image of the vehicle via the first display screen; If so, the rear view image of the vehicle is displayed via the second display screen.

2. The vehicle display switching method according to claim 1, characterized in that: The real-time detection of the first display screen comprises: Detecting in real time whether the capacitance of the first display screen changes; If not, a no raindrop signal is issued; If so, a raindrop signal is issued.

3. The vehicle display switching method according to claim 2, characterized in that: The real-time detection of whether the capacitance of the first display screen changes includes: Set preset signals; Sending a first signal to the first display screen and generating a second signal; determining a difference between the second signal and the first signal; and Determining whether a difference between the second signal and the first signal is the same as the preset signal; If yes, it is determined that the capacitance of the first display screen has not changed; If not, it is determined that the capacitance of the first display screen has changed.

4. The vehicle-mounted display switching method according to claim 2, characterized in that: The determining whether raindrops exist on the first display screen includes: Determining whether there are raindrops on the first display screen according to the real-time detection of whether the capacitance of the first display screen changes; If not, judging that there are no raindrops according to the raindrop-free signal; If so, it is determined that raindrops exist according to the raindrop signal.

5. The vehicle-mounted display switching method according to claim 2, characterized in that: When determining whether raindrops exist on the first display screen, two detection modules are used to detect whether the capacitance of the first display screen changes; If the capacitance of the first display screen detected by the two detection modules changes, it is determined that raindrops exist on the first display screen; If less than two of the detection modules detect that the capacitance of the first display screen has changed, it is determined that there are no raindrops on the first display screen.

6. The vehicle-mounted display switching method according to claim 2, characterized in that: When determining whether there are raindrops on the first display screen, detecting whether the capacitance of the first display screen changes by using N detection modules, where N ≥ 3, and N is an integer; If M detection modules detect that the capacitance of the first display screen has changed, 0.5N<M≤N, and M is an integer, it is determined that raindrops exist on the first display screen; If L detection modules detect that the capacitance of the first display screen has changed, 0≤L≤0.5N, and L is an integer, it is determined that there are no raindrops on the first display screen.

7. A vehicle display switching system, characterized in that: The vehicle-mounted display switching system is used for a vehicle, the vehicle has a first display screen and a second display screen, the first display screen is installed outside the vehicle, and the second display screen is arranged inside the vehicle; The vehicle-mounted display switching system comprises: A detection module, used for detecting the first display screen in real time; and A controller, configured to determine whether raindrops exist on the first display screen; If the controller determines that the result is no, the controller controls the first display screen to display a rear view image of the vehicle; If the controller determines that the answer is yes, the controller controls the second display screen to display the rear view image of the vehicle.

8. The vehicle-mounted display switching system according to claim 7, characterized in that: The detection module includes a capacitive sensor and a signal transceiver, the capacitive sensor is communicatively connected with the signal transceiver, and the capacitive sensor is installed on the first display screen; The signal transceiver is used to send a first signal to the capacitive sensor, and the first signal generates a second signal after passing through the first display screen; Setting a preset signal, and judging whether the capacitance of the first display screen changes according to whether the difference between the second signal and the first signal is the same as the preset signal; If the difference between the second signal and the first signal is the same as the preset signal, the capacitance of the first display screen does not change, and the signal transceiver sends a no-raindrop signal to the controller; the controller determines that there are no raindrops on the first display screen according to the no-raindrop signal, and then controls the first display screen to display the rear-view image; If the difference between the second signal and the first signal is different from the preset signal, the capacitance of the first display screen changes, and the signal transceiver sends a raindrop signal to the controller; the controller determines the presence of raindrops on the first display screen based on the raindrop signal, and then controls the second display screen to display the rear-view picture.

9. The vehicle-mounted display switching system according to claim 8, characterized in that: The first signal is a waveform signal, and the signal transceiver obtains a difference between the second signal and the first signal based on the comparison of the waveform data of the first signal and the waveform data of the second signal; the preset signal is the difference between the second signal and the first signal when there are no raindrops on the first display screen.

10. The vehicle-mounted display switching system according to claim 8, characterized in that: The number of the detection modules is two, and both of the detection modules are used to detect the first display screen in real time; When both detection modules detect that the capacitance of the first display screen has not changed, the signal transceiver sends the no-raindrop signal to the controller; the controller determines that there are no raindrops on the first display screen according to the no-raindrop signal, and then controls the first display screen to display the rear-view image; When one of the detection modules detects that the capacitance of the first display screen has not changed, and the other detection module detects that the capacitance of the first display screen has changed, the signal transceiver sends the no-raindrop signal to the controller; the controller determines that there are no raindrops on the first display screen according to the no-raindrop signal, and then controls the first display screen to display the rear-view image; When both detection modules detect changes in the capacitance of the first display screen, the signal transceiver sends the raindrop signal to the controller; the controller determines the presence of raindrops on the first display screen based on the raindrop signal, and then controls the second display screen to display the rear-view image.

Images