A digital exterior rearview mirror screen brightness control method, system and display device

Abstract

The present invention discloses a digital exterior rearview mirror screen brightness control method, system and display device, which continuously obtain the temperature value of the first set position of the digital exterior rearview mirror, and determine the screen brightness according to the temperature value of the first set position. The technical solution adjusts the brightness of the display screen based on the ambient temperature or the temperature of the display device, especially the temperature of the display screen, and provides a new display screen brightness adjustment method, which makes up for the existing technology that only adjusts the display screen brightness according to the ambient brightness, can adapt to seasonal changes, meet different scene requirements, and can automatically increase the screen brightness according to the ambient temperature, so that the screen can quickly heat up at low temperatures, ensuring driving safety under low temperature conditions.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic exterior rearview mirror screens, and in particular relates to a method, system and display device for controlling the brightness of a digital exterior rearview mirror screen at low temperatures. Background Art

[0002] Electronic exterior rearview mirrors are new automotive technology products that use a combination of cameras and display devices to replace traditional optical rearview mirrors. They have the advantages of low wind resistance, wide field of view, and little influence from weather and external light. However, the display device will have a relatively large delay under low temperature conditions, which will lead to a relatively large delay in the electronic exterior rearview mirror system, which will in turn cause the driver to make inaccurate judgments about the position of the vehicle in the rear field of view, which is prone to traffic accidents when changing lanes. Summary of the invention

[0003] The present invention aims to achieve the purpose of quickly raising the temperature of a display device under low temperature conditions by controlling the brightness of a display screen in the display device, and to issue a warning under low temperature conditions to prompt the driver to drive carefully and avoid traffic accidents.

[0004] The technical solution of the method for controlling the brightness of the screen of a digital exterior rearview mirror to achieve one of the purposes of the present invention includes:

[0005] The temperature value of the first setting position of the digital exterior rearview mirror is continuously obtained, and the screen brightness is determined according to the temperature value of the first setting position.

[0006] A further technical solution includes: the method for determining the screen brightness according to the temperature value of the first set position includes:

[0007] If the temperature value of the first setting position is lower than the first setting temperature T1, setting the screen brightness to the first setting brightness;

[0008] If the temperature value of the first setting position is equal to or higher than the first setting temperature T1 and lower than the second setting temperature T2, the screen brightness is set to the second setting brightness. Until the temperature value of the first setting position is equal to or higher than the third setting temperature T3, the screen brightness control mode is set to the automatic adjustment mode; the third setting temperature T3 is higher than the second setting temperature T2.

[0009] A further technical solution includes: further including setting the same or different continuous screen brightness durations according to different screen brightnesses. The continuous screen brightness duration is the duration during which the screen maintains the set screen brightness, and the screen brightness remains unchanged during this continuous screen brightness duration.

[0010] A further technical solution includes: when the temperature value of the first setting position is detected to be higher than the calibration temperature when the screen is just started, the screen brightness control mode is set to the automatic adjustment mode. A further technical solution includes: if there is a screen temperature alarm at this time, the screen temperature alarm is turned off. The calibration temperature is determined according to the low temperature characteristics of the screen. For example, if the screen will have a delay when it is lower than a certain temperature, then this temperature is set as the calibration temperature; if the screen temperature is detected to be higher than this calibration temperature when the screen is turned on, there is no need to heat the screen by adjusting the screen brightness.

[0011] A further technical solution includes: when the temperature value of the first setting position is an invalid value or cannot be obtained, continuously obtaining the temperature value of the second setting position, and determining the screen brightness according to the temperature value of the second setting position.

[0012] Since it is impossible to obtain the accurate screen temperature, in order to raise the screen temperature as quickly as possible, the screen needs to be heated with different brightness and / or different durations according to the temperature at other positions. Therefore, a further technical solution includes: it also includes determining the continuous screen on duration at the corresponding screen brightness according to the temperature and / or screen brightness at the second set position.

[0013] A further technical solution also includes: when determining the screen brightness, it also includes setting the continuous screen-on time at the corresponding brightness according to the screen brightness. For example: when the screen brightness is 100%, the continuous screen-on time of the screen at this brightness is set to 10 minutes; when the screen brightness is 80%, the continuous screen-on time of the screen at this brightness is set to 8 minutes. The continuous screen-on time can be set according to actual conditions and is not limited in the present invention.

[0014] A further technical solution includes: the method for determining the screen brightness according to the temperature value of the second set position includes:

[0015] If the temperature value at the second setting position is lower than the fourth setting temperature T4, the screen brightness is set to the third setting brightness, and the continuous screen-on time at the third setting brightness is set to the first setting time;

[0016] If the temperature value at the second setting position is equal to or higher than the fourth setting temperature T4 and lower than the fifth setting temperature T5, the screen brightness is set to the fourth setting brightness, and the continuous screen-on time at the brightness is set to the second setting time;

[0017] If the temperature value of the second setting position is equal to or higher than the fifth setting temperature T5 and lower than the sixth setting temperature T6, the screen brightness is set to the fifth setting brightness, and the continuous screen light duration at this brightness is set to the third setting duration.

[0018] A further technical solution includes: when the continuous screen-on time ends, setting the screen brightness adjustment mode to automatic adjustment; the automatic adjustment mode automatically adjusts the screen brightness according to the ambient brightness.

[0019] The technical solution of the control system for the screen brightness of a digital exterior rearview mirror to achieve the second object of the present invention comprises: a first temperature acquisition module and a first screen brightness control module;

[0020] The first temperature acquisition module is used to acquire the temperature value of the first set position of the digital exterior rearview mirror;

[0021] The first screen brightness control module is used to determine the screen brightness according to the temperature value of the first set position.

[0022] A further technical solution includes: the system also includes a second temperature acquisition module, which is used to obtain the temperature value of the second set position.

[0023] Further technical solutions include: the system also includes a second screen brightness control module, which is used to determine the screen brightness according to the temperature value of the second set position; setting the same or different continuous screen light time according to different screen brightness; the continuous screen light time is the time when the screen remains at the set brightness.

[0024] A display device for achieving the third purpose of the present invention includes a main body, which is used to display the view outside the vehicle. A display screen is arranged in the main body, including a temperature acquisition unit, which is used to acquire the temperature of the display screen and is configured in the main body; and also includes a brightness control module, which is used to determine the brightness of the display screen according to the temperature of the display screen acquired by the temperature acquisition unit.

[0025] Furthermore, the display device also includes an image acquisition device, which is configured to transmit data to the display device to form a digital exterior rearview mirror system.

[0026] Furthermore, the brightness control module in the display device is also configured to control the continuous screen-on time of the screen brightness; different screen brightnesses correspond to the same or different continuous screen-on time.

[0027] Beneficial effects:

[0028] The technical solution adjusts the brightness of the display screen based on the ambient temperature or the temperature of the display device, especially the temperature of the display screen, and provides a new display screen brightness adjustment method, which makes up for the existing technology that only adjusts the display screen brightness based on the ambient brightness, and can adapt to seasonal changes and meet different scene requirements; when the ambient temperature is lower than a certain temperature, the system and method described in the present invention can automatically increase the screen brightness according to the ambient temperature, so that the screen can quickly heat up at low temperatures, thereby ensuring driving safety in low temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the system of the present invention;

[0030] Figure 2 This is a schematic diagram of the interaction between IVI and electronic exterior mirrors;

[0031] Figure 3 is a schematic diagram of the electronic exterior rearview mirror system;

[0032] Figure 4 is a schematic diagram of screen brightness control logic when the screen temperature is normal in the embodiment;

[0033] Figure 5 3 is a schematic diagram of the screen brightness control logic when the screen temperature is abnormal in the embodiment. DETAILED DESCRIPTION

[0034] The following specific implementations are used to explain the technical solutions of the claims of the present invention so that those skilled in the art can understand the claims. The protection scope of the present invention is not limited to the following specific implementation structures. The technical solutions of the claims of the present invention made by those skilled in the art but different from the following specific implementations are also within the protection scope of the present invention.

[0035] In the description of the present invention, the terms "first", "second", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0036] like Figure 2 The digital exterior rearview mirror system shown in the figure is mainly composed of two cameras, two monitors and a controller, which is connected to other systems through CAN bus and Ethernet. Compared with the traditional rearview mirrors arranged outside the car, the monitors of the digital exterior rearview mirrors are arranged on both sides of the cockpit to replace the traditional point-on exterior rearview mirrors. The monitors are used to display the rear scene observed by the camera to replace the traditional mechanical rearview mirrors.

[0037] like Figure 3As shown in the figure, when the system is in normal operation, the screen brightness is controlled according to the brightness sensor. The electronic exterior rearview mirror obtains the value of the brightness sensor from the IVI through the CAN bus. After the electronic exterior rearview mirror obtains the brightness sensor signal through the CAN bus, it controls the brightness of the screen according to the value of the brightness sensor. Since the screen brightness values ​​of different vehicles are different, in order to ensure the consistency of the brightness of different screens in the vehicle, the specific brightness control value should be calibrated according to the actual vehicle, and the scene can be divided into different scenes such as day, night, cloudy, rainy, etc. At the same time, the brightness of the electronic exterior rearview mirror can be adjusted through the UI interface on the IVI to meet the brightness requirements of different drivers. Users can adjust the brightness in 10 levels on the MP5 (1 to 10, the default is 5), and the default value is the actual calibration value. When the system starts, the brightness setting before the previous user shuts down the system is used. However, the monitor of the digital exterior rearview mirror system will have a certain delay in the low temperature. In order to reduce this delay, the temperature of the screen is first increased in the low temperature, so that the screen can be quickly heated up in the low temperature and reduce the delay of the screen.

[0038] When the temperature value of the digital exterior rearview mirror screen is a valid value, the temperature value of the first setting position is continuously monitored, and different screen brightnesses are determined according to different temperature values ​​of the first setting position. In this embodiment, the first setting position is the screen of the digital exterior rearview mirror, and the temperature of each screen is continuously obtained by a temperature sensor installed on each screen.

[0039] Whether the temperature value of the digital exterior rearview mirror screen is a valid value can be judged by the temperature value obtained from the screen temperature sensor. When the screen temperature sensor fails, the obtained screen temperature value is an invalid value or the screen temperature value cannot be obtained.

[0040] When the screen temperature sensor is normal, the control logic of the screen brightness is as follows: Figure 4 As shown, the details are as follows:

[0041] When the system is in operation when it is turned on, if the screen temperature is detected to be higher than the calibrated temperature, if there is a screen temperature warning function on the screen, turn off the screen warning function, and the screen brightness is controlled according to the light brightness sensor. In this embodiment, the calibrated temperature is -20°C. When the screen is lower than the calibrated temperature, a delay will occur, which may affect the driver's judgment and thus affect the safety of the vehicle. When the temperature is higher than the calibrated temperature, the screen brightness can be automatically adjusted according to the light sensor.

[0042] When the system is in working state, the electronic exterior rearview mirror system can read the screen temperature sensor value;

[0043] When it is detected that the screen temperature is lower than the first set temperature T1, which is -40°C in this embodiment, the electronic exterior rearview mirror system will adjust the screen brightness control to the first set brightness, which is 100% in this embodiment. Preferably, a prompt will be displayed on the screen at this time that the system delay is relatively large, and the driver is requested to drive carefully and pay attention to driving safety.

[0044] When it is detected that the screen temperature is equal to or higher than the first set temperature T1, but lower than the second set temperature T2, in this embodiment, the second set temperature T2 is -20°C, and the screen brightness is set to the second set brightness, which is 80% in this embodiment, to avoid the screen being too bright and affecting the driver's driving. During this process, the screen temperature is continuously monitored. If it is detected that the screen temperature is lower than the third set temperature T3, in this embodiment, the third set temperature T3 is -10°C, the screen continues to maintain this brightness; if the screen temperature is equal to or higher than the third set temperature T3, the screen warning function is turned off at this time, and the brightness of the screen is controlled according to the light brightness sensor to improve the comfort of the driver. The third set temperature T3 can be slightly higher than the aforementioned calibration temperature, or it can be equal to the calibration temperature.

[0045] When a screen temperature sensor failure is detected when the system is powered on, the screen temperature obtained by the screen temperature sensor in the digital exterior rear view is an invalid value.

[0046] When the screen temperature value cannot be obtained or is an invalid value, the temperature value of the second setting position is continuously obtained, and the screen brightness is determined according to the temperature value of the second setting position. In this embodiment, the second setting position is the instrument in the car, and the ambient temperature value in the car is obtained by the temperature sensor installed at the instrument in the car. The specific control logic of the screen brightness is as follows: Figure 5 As shown;

[0047] If the ambient temperature is lower than the fourth set temperature T4, the screen brightness is set to the third set brightness, and the continuous screen-on time at this brightness is set to the first set time; in this embodiment, the fourth set temperature T4 is -40°C, the third set brightness is 100%, and the first set time is 10 minutes; preferably, a voice and / or text warning of the low ambient temperature will be given on the screen at the same time; when 10 minutes have passed, the screen warning is turned off, and the screen brightness control is automatically controlled by the light brightness sensor.

[0048] If the screen temperature is equal to or higher than the fourth set temperature T4 and lower than the fifth set temperature T5, the screen brightness is set to the fourth set brightness, and the continuous screen-on time at this brightness is set to the second set time; in this embodiment, the fifth set temperature T5 is -30°C, the fourth set brightness is 90%, and the second set time is 10 minutes; preferably, a voice and / or text warning of the low ambient temperature will be given on the screen at the same time; when 10 minutes have passed, the screen warning is turned off, and the screen brightness control is automatically controlled by the light brightness sensor.

[0049] If the screen temperature is equal to or higher than the fifth set temperature T5 and lower than the sixth set temperature T6, the screen brightness is set to the fifth set brightness, and the continuous screen-on time at this brightness is set to the third set time; in this embodiment, the sixth set temperature T6 is -20°C, the fifth set brightness is 80%, and the third set time is 10 minutes; preferably, a voice and / or text warning of the low ambient temperature will be given on the screen at the same time; when 10 minutes have passed, the screen warning is turned off, and the screen brightness control is automatically controlled by the light brightness sensor.

[0050] Since different screens have different heating characteristics, the heating time of the screen needs to be calibrated and tested according to actual conditions and is not limited to the above-mentioned set time in this embodiment.

[0051] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0052] The present application also provides a control system for the brightness of a digital exterior rearview mirror screen. Figure 1 As shown, it includes: a first temperature acquisition module and a first screen brightness control module;

[0053] The first temperature acquisition module is used to acquire the temperature at a first set position of the digital exterior rearview mirror. In this embodiment, the first set position is the screen of the digital exterior rearview mirror.

[0054] The first screen brightness control module is used to determine the screen brightness value according to the temperature value at the first set position.

[0055] In another embodiment, the system further includes a second temperature acquisition module, which is used to acquire a temperature value of a second set position. In this embodiment, the second set position is an instrument panel in the vehicle, which is used to acquire the temperature in the vehicle.

[0056] In another embodiment, the system further includes a second screen brightness control module, which is used to determine the screen brightness according to the temperature value of the second set position, and different screen brightness settings have the same or different continuous screen-on time durations.

[0057] An embodiment of the present application also provides a display device, including a main body, which is used to display the view outside the vehicle. A display screen is arranged in the main body, and also includes a temperature acquisition unit. The temperature acquisition unit acquires the temperature of the display screen through a temperature sensor and is configured in the main body; it also includes a brightness control module, which determines the brightness value of the display screen according to the temperature of the display screen acquired by the temperature acquisition unit, and outputs a control instruction of the brightness data according to the brightness value, and the control command is used to adjust the brightness of the display screen.

[0058] In another embodiment, it also includes an image acquisition device, which is configured to transmit data to a display device to form a digital exterior rearview mirror system. In this embodiment, the image acquisition device can be a camera configured outside the vehicle.

[0059] In another embodiment, the brightness control module is further configured to control the duration of the screen brightness.

[0060] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. The computer program includes program instructions. When the program instructions are executed by a processor, the various steps of the method described in the present invention are implemented, which will not be repeated here.

[0061] The computer-readable storage medium may be the data transmission device provided in any of the aforementioned embodiments or the internal storage unit of the computer device, such as the hard disk or memory of the computer device. The computer-readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk, a smart memory card (smartmedia card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc., provided on the computer device.

[0062] Furthermore, the computer-readable storage medium may include both an internal storage unit of the computer device and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by the computer device. The computer-readable storage medium may also be used to temporarily store data to be output or has been output.

[0063] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0064] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0065] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0066] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

Claims

1. A method for controlling the brightness of a digital exterior rearview mirror screen, characterized in that: Continuously obtaining a temperature value of a first set position of a digital exterior rearview mirror, and determining screen brightness according to the temperature value of the first set position; The method for determining screen brightness according to the temperature value of the first set position includes: If the temperature value of the first setting position is lower than the first setting temperature T1, setting the screen brightness to the first setting brightness; If the temperature value of the first setting position is equal to or higher than the first setting temperature T1 and lower than the second setting temperature T2, the screen brightness is set to the second setting brightness, until the temperature value of the first setting position is equal to or higher than the third setting temperature T3, the screen brightness control mode is set to the automatic adjustment mode; When the temperature value of the first setting position is an invalid value or cannot be obtained, continuously obtaining the temperature value of the second setting position, and determining the screen brightness according to the temperature value of the second setting position; The method for determining screen brightness according to the temperature value of the second set position includes: If the temperature value at the second setting position is lower than the fourth setting temperature T4, the screen brightness is set to the third setting brightness, and the continuous screen-on time at the third setting brightness is set to the first setting time; If the temperature value at the second setting position is equal to or higher than the fourth setting temperature T4 and lower than the fifth setting temperature T5, the screen brightness is set to the fourth setting brightness, and the continuous screen-on time at the brightness is set to the second setting time; If the temperature value at the second setting position is equal to or higher than the fifth setting temperature T5 and lower than the sixth setting temperature T6, the screen brightness is set to the fifth setting brightness, and the continuous screen-on time at the brightness is set to the third setting time; The second setting position is a meter in the vehicle.

2. The method for controlling the brightness of a digital exterior rearview mirror screen according to claim 1, characterized in that: It also includes setting the same or different continuous screen-on time according to different screen brightness.

3. The method for controlling the brightness of a digital exterior rearview mirror screen according to claim 1, characterized in that: When the screen is just started and it is detected that the temperature value of the first setting position is higher than the calibrated temperature, the screen brightness control mode is set to the automatic adjustment mode.

4. The method for controlling the brightness of a digital exterior rearview mirror screen according to claim 1, characterized in that: It also includes determining the continuous screen-on time at the corresponding screen brightness based on the temperature and / or screen brightness of the second set position.

5. The method for controlling the brightness of a digital exterior rearview mirror screen according to claim 1, characterized in that: When the continuous screen-on time ends, the screen brightness adjustment mode is set to automatic adjustment.

6. A control system for screen brightness of a digital exterior rearview mirror using the method of claim 1, characterized in that: It includes a first temperature acquisition module and a first screen brightness control module; The first temperature acquisition module is used to acquire the temperature value of the first set position of the digital exterior rearview mirror; The first screen brightness control module is used to determine the screen brightness value according to the temperature value of the first set position; The method for determining screen brightness according to the temperature value of the first set position includes: If the temperature value of the first setting position is lower than the first setting temperature T1, setting the screen brightness to the first setting brightness; If the temperature value of the first setting position is equal to or higher than the first setting temperature T1 and lower than the second setting temperature T2, the screen brightness is set to the second setting brightness, until the temperature value of the first setting position is equal to or higher than the third setting temperature T3, the screen brightness control mode is set to the automatic adjustment mode; When the temperature value of the first setting position is an invalid value or cannot be obtained, continuously obtaining the temperature value of the second setting position, and determining the screen brightness according to the temperature value of the second setting position; The method for determining screen brightness according to the temperature value of the second set position includes: If the temperature value at the second setting position is lower than the fourth setting temperature T4, the screen brightness is set to the third setting brightness, and the continuous screen-on time at the third setting brightness is set to the first setting time; If the temperature value at the second setting position is equal to or higher than the fourth setting temperature T4 and lower than the fifth setting temperature T5, the screen brightness is set to the fourth setting brightness, and the continuous screen-on time at the brightness is set to the second setting time; If the temperature value at the second setting position is equal to or higher than the fifth setting temperature T5 and lower than the sixth setting temperature T6, the screen brightness is set to the fifth setting brightness, and the continuous screen-on time at the brightness is set to the third setting time; The second setting position is a meter in the vehicle.

7. The control system for the brightness of the digital exterior rearview mirror screen as claimed in claim 6, characterized in that: Set the same or different continuous screen-on time according to different screen brightness.

8. A display device for executing the method of claim 1, comprising a body, a display screen being arranged in the body, characterized in that: It also includes a temperature acquisition unit and a brightness control module. The temperature acquisition unit is configured in the body and is used to acquire the temperature of the display screen. The brightness control module is used to determine the brightness of the display screen according to the temperature of the display screen acquired by the temperature acquisition unit.

9. The display device according to claim 8, wherein: It also includes an image acquisition device, which is configured to transmit data to a display device to form a digital exterior rearview mirror system.

10. The display device according to claim 8 or 9, characterized in that: The brightness control module is also configured to control the screen brightness and the duration of the screen being on.

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