Brightness control method and apparatus, device, and storage medium

Abstract

The present application provides a brightness control method and apparatus, a device, and a storage medium. The method comprises: firstly, acquiring a current manual brightness adjustment level of a display screen of a vehicle; on the basis of the current manual brightness adjustment level, obtaining a corresponding manual adjustment brightness signal and then determining whether a brightness automatic adjustment function of the display screen is in an on-state; and if so, when a change in environmental brightness is detected, on the basis of a combination of the manual adjustment brightness signal and a brightness detection signal of a brightness sensor, automatically adjusting the backlight brightness of the display screen. When a change in environmental brightness is detected, the backlight brightness of the display screen is adaptively adjusted by means of the brightness automatic adjustment function on the basis of supporting the manual adjustment of the backlight brightness of the display screen, which overcomes the defect of poor visual experience caused by fixed manual brightness levels and automatic brightness calibration in the related art, thereby improving the driving and riding visual experience when a driving scenario changes, and ensuring that users obtain better visual comfort.

Description

Brightness control method, device, equipment and storage medium

[0001] The present application claims priority to the Chinese patent application No. 202410588052.9, filed on May 13, 2024, and entitled "Brightness control method, device, equipment and storage medium", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of vehicle control, in particular to a brightness control method, device, equipment and storage medium. BACKGROUND

[0003] At present, various types of vehicles usually support multi-region screen display of the cabin system, and different display regions have different functional requirements, such as instrument display, central control display, co-pilot display, rear seat display, armrest screen display, etc.

[0004] Generally, each display screen supports independent backlight brightness control, that is, it can meet the comfortable brightness display of different users in different scenarios, and also save power. The driver and passenger can also manually adjust the brightness of each region display screen through the steering wheel and screen brightness bar, or automatically adjust the screen brightness based on the light sensor of the vehicle to perceive the ambient brightness.

[0005] However, in the prior art supporting manual backlight brightness adjustment, the brightness of the screen is fixed after the user sets the brightness level. Once the scene changes, such as entering and leaving the garage, the tunnel, etc., which are greatly affected by the environment contrast, the visual experience of the driver and passenger will be very poor. Even if automatic brightness adjustment is supported, the calibrated automatic brightness cannot ensure that the user obtains better visual comfort. Therefore, the backlight brightness adjustment of each display screen of the vehicle needs a solution to overcome the defects in the prior art. SUMMARY

[0006] The present application provides a brightness control method, device, equipment and storage medium, which is used to solve the technical problem that the manual backlight brightness adjustment and automatic brightness adjustment of each display screen of the vehicle in the prior art are fixed, resulting in poor visual experience in some driving scenarios and thus unable to ensure that the user obtains better visual comfort.

[0007] In a first aspect, the present application provides a brightness control method, comprising:

[0008] obtaining the current manual brightness adjustment level of the vehicle display screen, and obtaining a corresponding manual adjustment brightness signal according to the current manual brightness adjustment level;

[0009] determining whether the brightness automatic adjustment function of the display screen is in an open state;

[0010] If yes, automatically adjusting the backlight brightness of the display screen according to the manual brightness adjustment signal and the brightness detection signal of the brightness sensor when detecting that the ambient brightness changes.

[0011] In a possible design, the automatically adjusting the backlight brightness of the display screen according to the manual brightness adjustment signal and the brightness detection signal of the brightness sensor includes:

[0012] determining a valid brightness detection signal of the brightness sensor according to the brightness detection signal of the brightness sensor;

[0013] determining a target brightness signal of the display screen by a brightness fusion algorithm according to the valid brightness detection signal and the manual brightness adjustment signal;

[0014] adjusting the backlight brightness of the display screen according to the target brightness signal;

[0015] wherein the brightness fusion algorithm is a fusion algorithm generated according to a screen adjustment parameter of the vehicle, and the screen adjustment parameter is obtained by real vehicle calibration on the vehicle.

[0016] In a possible design, the determining the valid brightness detection signal of the brightness sensor according to the brightness detection signal of the brightness sensor includes:

[0017] determining whether the brightness detection signal sensed by the brightness sensor for a continuous preset number of times is all greater than or less than the brightness detection signal sensed last time;

[0018] if yes, determining the brightness detection signal sensed by the brightness sensor for the first preset number of times as the valid brightness detection signal;

[0019] wherein, when the brightness detection signal sensed for a continuous preset number of times is all greater than the brightness detection signal sensed last time, the ambient brightness continuously increases; and when the brightness detection signal sensed for a continuous preset number of times is all greater than the brightness detection signal sensed last time, the ambient brightness continuously decreases.

[0020] In a possible design, if the change of the ambient brightness is not detected, the method further includes:

[0021] automatically adjusting the backlight brightness of the display screen according to the manual brightness adjustment signal and the current brightness detection signal of the brightness sensor.

[0022] In a possible design, the automatically adjusting the backlight brightness of the display screen according to the manual brightness adjustment signal and the current brightness detection signal of the brightness sensor includes:

[0023] acquire a current brightness detection signal of the brightness sensor;

[0024] determine a target brightness signal of the display screen according to the manual adjustment brightness signal and the current brightness detection signal of the brightness sensor through a brightness fusion algorithm;

[0025] adjust the backlight brightness of the display screen according to the target brightness signal.

[0026] In a possible design, if it is determined that the brightness automatic adjustment function is in the off state, the method further includes:

[0027] automatically adjust the backlight brightness of the display screen according to the manual adjustment brightness signal and the default brightness detection signal of the brightness sensor.

[0028] In a possible design, the adjusting the backlight brightness of the display screen according to the target brightness signal includes:

[0029] acquire a current brightness signal of the backlight brightness of the display screen;

[0030] determine a brightness adjustment signal of a control period based on a step control strategy according to the current brightness signal and the target brightness signal;

[0031] stepwise adjust the backlight brightness of the display screen to a target brightness according to the brightness adjustment signal in the control period;

[0032] wherein the current brightness signal and the target brightness signal are both represented by a pulse width modulation value of a backlight control circuit of the display screen.

[0033] In a possible design, the display screen includes at least one of an instrument display screen, a central control display screen, a co-pilot display screen, a rear-row display screen and an armrest display screen of the vehicle.

[0034] In a possible design, the brightness sensor is located at an upper left corner or an upper right corner of the display screen.

[0035] In a possible design, the display screen is provided with an adjustment control, and the adjustment control is used to switch the on and off states of the brightness automatic adjustment function.

[0036] In a second aspect, the present application provides a brightness control device, including:

[0037] an acquisition module, configured to acquire a current manual brightness adjustment level of a display screen of a vehicle, and obtain a corresponding manual adjustment brightness signal according to the current manual brightness adjustment level;

[0038] determining whether the automatic brightness adjustment function of the display screen is in an open state;

[0039] adjusting the backlight brightness of the display screen according to the manual brightness adjustment signal and the brightness detection signal of the brightness sensor if it is determined that the automatic brightness adjustment function is in the open state.

[0040] In a possible design, the adjusting module is specifically configured to:

[0041] determine the valid brightness detection signal of the brightness sensor according to the brightness detection signal of the brightness sensor;

[0042] determine the target brightness signal of the display screen according to the valid brightness detection signal and the manual brightness adjustment signal through a brightness fusion algorithm;

[0043] adjust the backlight brightness of the display screen according to the target brightness signal;

[0044] The brightness fusion algorithm is a fusion algorithm generated according to screen adjustment parameters of the vehicle, and the screen adjustment parameters are obtained by real vehicle calibration on the vehicle.

[0045] In a possible design, the adjusting module is further configured to:

[0046] determine whether the brightness detection signal sensed by the brightness sensor for a continuous preset number of times is all greater than or less than the brightness detection signal of the previous time;

[0047] if yes, determine the brightness detection signal of the brightness sensor at the first preset time as the valid brightness detection signal;

[0048] When the brightness detection signal sensed for a continuous preset number of times is all greater than the brightness detection signal of the previous time, the ambient brightness continuously increases; when the brightness detection signal sensed for a continuous preset number of times is all less than the brightness detection signal of the previous time, the ambient brightness continuously decreases.

[0049] In a possible design, if the ambient brightness change is not detected, the adjusting module is further configured to:

[0050] adjust the backlight brightness of the display screen according to the manual brightness adjustment signal and the current brightness detection signal of the brightness sensor.

[0051] In a possible design, the adjusting module is further configured to:

[0052] obtain the current brightness detection signal of the brightness sensor;

[0053] determining a target brightness signal of the display screen according to the manual brightness adjustment signal and a current brightness detection signal of the brightness sensor through a brightness fusion algorithm;

[0054] adjusting the backlight brightness of the display screen according to the target brightness signal. In a possible design, if it is determined that the brightness automatic adjustment function is in the closed state, the adjusting module is further configured to:

[0055] automatically adjusting the backlight brightness of the display screen according to the manual brightness adjustment signal and a default brightness detection signal of the brightness sensor. In a possible design, the adjusting module is further configured to:

[0056] obtaining a current brightness signal of the backlight brightness of the display screen;

[0057] determining a brightness adjustment signal of a control period based on a step control strategy according to the current brightness signal and the target brightness signal;

[0058] adjusting the backlight brightness of the display screen to a target brightness in the control period according to the brightness adjustment signal in a step-by-step manner;

[0059] wherein the current brightness signal and the target brightness signal are both represented by a pulse width modulation value of a backlight control circuit of the display screen.

[0060] In a possible design, the display screen includes at least one of an instrument display screen, a central control display screen, a co-pilot display screen, a rear-row display screen and an armrest display screen of the vehicle.

[0061] In a possible design, the brightness sensor is located at an upper left corner or an upper right corner of the display screen.

[0062] In a possible design, the display screen is provided with an adjusting control, and the adjusting control is used to switch the opened state and the closed state of the brightness adjustment function.

[0063] In a third aspect, the present application provides an electronic device, including: a processor, and a memory connected with the processor in communication;

[0064] the memory stores computer execution instructions;

[0065] the processor executes the computer execution instructions stored in the memory, so as to implement any one of the possible brightness control methods provided in the first aspect.

[0066] In a fourth aspect, the present application provides a computer readable storage medium, wherein the computer readable storage medium stores computer execution instructions, and the computer execution instructions are used to implement any one of the possible brightness control methods provided in the first aspect when executed by a processor.

[0067] In a fifth aspect, the present application provides a computer program product, comprising computer execution instructions, and the computer execution instructions are used to implement any one of the possible brightness control methods provided in the first aspect when executed by a processor.

[0068] The present application provides a brightness control method, device, equipment and storage medium. First, the current manual brightness adjustment level of a vehicle display screen is obtained, and a corresponding manual adjustment brightness signal is obtained according to the current manual brightness adjustment level. Then, it is judged whether the brightness automatic adjustment function of the display screen is in an open state. If yes, when a change in ambient brightness is detected, the backlight brightness of the display screen is automatically adjusted according to the combination of the manual adjustment brightness signal and the brightness detection signal of the brightness sensor. When a change in ambient brightness is detected, the backlight brightness of the display screen is adjusted by the brightness automatic adjustment function of the display screen on the basis of supporting manual adjustment of the backlight brightness of the display screen, so as to overcome the defect that the visual experience is poor due to the fixed manual brightness level and automatic brightness calibration in the related art, thereby improving the driving visual experience when the driving scene changes and ensuring that the user obtains better visual comfort. BRIEF DESCRIPTION OF DRAWINGS

[0069] FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application;

[0070] FIG. 2 is a flowchart of a brightness control method provided by an embodiment of the present application;

[0071] FIG. 3 is a schematic diagram of an adjustment control of a brightness automatic adjustment function provided by an embodiment of the present application;

[0072] FIG. 4 is a flowchart of another brightness control method provided by an embodiment of the present application;

[0073] FIG. 5 is a schematic diagram of a brightness curve provided by an embodiment of the present application;

[0074] FIG. 6 is a flowchart of still another brightness control method provided by an embodiment of the present application;

[0075] FIG. 7 is a schematic diagram of step-by-step adjustment of backlight brightness provided by an embodiment of the present application;

[0076] FIG. 8 is a schematic diagram of the structure of a brightness control device provided by an embodiment of the present application;

[0077] FIG. 9 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present application. Detailed Implementation

[0078] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of methods and apparatus consistent with some aspects of this application as detailed in the appended claims.

[0079] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0080] In multi-area screen displays within a vehicle, each screen supports independent backlight brightness control. This allows for comfortable brightness display for different users in various scenarios, while also saving energy. Passengers can manually adjust the brightness of each screen area via the steering wheel or screen brightness bar, or the system can automatically adjust screen brightness based on ambient light sensors. However, in existing solutions that support manual backlight brightness adjustment, the screen brightness is fixed after the user sets a brightness level. This results in a poor visual experience for passengers in complex scenarios, such as entering or exiting garages or tunnels where environmental contrast is significant. Even with automatic brightness adjustment, the calibrated automatic brightness cannot guarantee optimal visual comfort for users.

[0081] To solve the above problems in the prior art, the present application provides a brightness control method, device, equipment and storage medium. The application concept of the brightness control method provided by the present application is that when the ambient brightness is detected to change, the backlight brightness of the display screen is adaptively adjusted based on the manual brightness adjustment level of the display screen and the brightness detection signal sensed by the brightness sensor when the display screen brightness automatic adjustment function is in the open state, which can improve the driving visual experience when the driving scene ambient brightness changes, overcome the defects that the manual brightness level is fixed and the automatic brightness adjustment is calibrated to be fixed in the related art, and the visual experience is poor and the user cannot obtain better visual comfort once the light of the driving scene changes, can ensure that the user obtains better visual comfort, so that the user obtains a more extreme and delicate driving experience, adds a new solution for the function scene of the whole vehicle, and improves the diversity of the product design scheme.

[0082] FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application. As shown in FIG. 1, the electronic device 100 is configured to execute the brightness control method provided by the embodiment of the present application, and when the display screen brightness automatic adjustment function is in the open state, the backlight brightness of the display screen is adaptively adjusted by the brightness automatic adjustment function of the display screen based on the manual adjustment of the backlight brightness of the display screen of the vehicle 200, thereby realizing the brightness control of the backlight brightness of the display screen of the vehicle 200. The display screen of the vehicle 200 can include, but is not limited to, at least one of the instrument display screen, the central control display screen, the co-pilot display screen, the rear display screen, the armrest display screen and other display screens.

[0083] In some embodiments, the electronic device 100 can be, for example, a smart cockpit controller (Display head unit, DHU for short) of the vehicle 200, an electronic control unit (Electronic Control Unit, ECU for short) and the like. The type of the electronic device 100 is not limited in the embodiment of the present application, and the electronic device 100 is illustrated as the DHU in FIG. 1.

[0084] It should be noted that the application scenarios described above are only illustrative, and the brightness control method provided by the embodiment of the present application includes but is not limited to the above-mentioned application scenarios.

[0085] FIG. 2 is a flowchart of a brightness control method provided by an embodiment of the present application. As shown in FIG. 2, the brightness control method provided by the embodiment of the present application includes:

[0086] S101: Obtain the current manual brightness adjustment level of the vehicle display screen, and obtain the corresponding manual adjustment brightness signal according to the current manual brightness adjustment level.

[0087] The display screen supports manual adjustment of its backlight brightness by the user. For example, the vehicle is provided with a brightness level that can be adjusted by the user when it leaves the factory, and the user can manually adjust the brightness level to achieve the effect of manually adjusting the backlight brightness of the display screen.

[0088] In some embodiments, the range of brightness levels provided when the vehicle leaves the factory can be 1-15, and the user can adjust the manual brightness adjustment level of the display screen to any level in the range of 1-15 according to personal needs. Alternatively, the vehicle can also be provided with a default manual brightness adjustment level when it leaves the factory, such as level 10 as the default manual brightness adjustment level, etc., which is not limited by the embodiments of the present application. Therefore, the electronic device, such as the DHU, can obtain the current manual brightness adjustment level of the display screen of the vehicle according to the manually inputted or default manual brightness adjustment level when the vehicle leaves the factory.

[0089] Further, since each vehicle is provided with its own range of brightness levels when it leaves the factory, each manual brightness adjustment level corresponds to a respective manual adjustment brightness signal. When the current manual brightness adjustment level of the display screen is obtained, the manual adjustment brightness signal corresponding to the current manual brightness adjustment level can also be obtained.

[0090] In some embodiments, the manual adjustment brightness signal can be represented by the pulse width modulation value of the backlight control circuit of the display screen.

[0091] S102: Determine whether the brightness automatic adjustment function of the display screen is in an open state.

[0092] The display screen has a brightness automatic adjustment function, which can be in an open state or a closed state. When the brightness automatic adjustment function is in the open state, the backlight brightness of the display screen can be adjusted according to the brightness change of the driving environment sensed by the brightness sensor; when the brightness automatic adjustment function is in the closed state, the backlight brightness of the display screen is not affected by the brightness change of the environment sensed by the brightness sensor.

[0093] In some embodiments, an adjustment control can be provided on the display screen, which is used to switch the open and closed states of the brightness automatic adjustment function. As shown in (a) of FIG. 3, the brightness adjustment function of the display screen is in the open state, and as shown in (b) of FIG. 3, the brightness adjustment function of the display screen is in the closed state.

[0094] In some embodiments, the electronic device can determine whether the brightness automatic adjustment function of the display screen is in the open state or the closed state according to the state of the adjustment control, and if it is determined that the brightness automatic adjustment function of the display screen is in the open state, further steps S103a or S103b are performed; if it is determined that the brightness automatic adjustment function of the display screen is not in the open state, i.e., in the closed state, further step S103c is performed.

[0095] S103a: When detecting that the ambient brightness changes, automatically adjusting the backlight brightness of the display screen according to the manually adjusted brightness signal and the brightness detection signal of the brightness sensor.

[0096] When the brightness automatic adjustment function of the display screen is in the open state, the brightness sensor can perceive the ambient brightness of the vehicle driving scene. The ambient brightness of the driving scene is determined by the driving scene, and the ambient brightness may or may not change, such as when the vehicle enters and exits the garage, the tunnel, and other scenes, the ambient light changes, causing the ambient brightness to change. For example, if the brightness detection signal perceived by the brightness sensor changes, it indicates that the ambient brightness has changed, and if the brightness detection signal perceived by the brightness sensor does not change, it indicates that the ambient brightness has not changed.

[0097] When detecting that the ambient brightness changes, i.e., step S103a is performed, for example, the manually adjusted brightness signal corresponding to the current manually adjusted brightness level of the display screen and the brightness detection signal perceived by the brightness sensor are fused, and the backlight brightness of the display screen is automatically adjusted according to the fusion result.

[0098] In one possible design, a possible implementation of step S103a is shown in FIG. 4. FIG. 4 is a flowchart of another brightness control method provided by an embodiment of the present application. As shown in FIG. 4, the embodiment of the present application includes:

[0099] S201: Determine the brightness effective detection signal of the brightness sensor according to the brightness detection signal of the brightness sensor.

[0100] When detecting that the ambient brightness changes, for example, the ambient brightness can be continuously enhanced or continuously weakened, and the ambient brightness perceived by the brightness sensor is continuously enhanced or continuously weakened, so that the brightness effective detection signal needs to be determined from the brightness detection signal perceived by the brightness sensor during fusion calculation, and the brightness effective detection signal is used for fusion calculation.

[0101] In one possible design, the possible implementation of step S201 includes:

[0102] If the result of the judgment is yes, that is, the brightness detection signals sensed by the brightness sensor in the continuous preset times are all greater than the brightness detection signal sensed in the previous time, it indicates that the ambient brightness is continuously enhanced, and the continuously enhanced ambient brightness causes the brightness detection signal sensed by the brightness sensor in the preset times to continuously increase. Or, if the brightness detection signals sensed in the continuous preset times are all less than the brightness detection signal sensed in the previous time, it indicates that the ambient brightness is continuously weakened, and the continuously weakened ambient brightness causes the brightness detection signal sensed by the brightness sensor in the preset times to continuously decrease. Therefore, when the ambient brightness is continuously enhanced or continuously weakened, the brightness detection signal sensed by the brightness sensor in the preset time is determined as the effective brightness detection signal of the brightness sensor. Otherwise, if the result of the judgment is no, it indicates that the ambient brightness is not continuously enhanced or continuously weakened, and the preset brightness detection signal is used as the effective brightness detection signal of the brightness sensor for fusion calculation.

[0103] For example, the preset times are the maximum detection times (MaxNumcalAmbBri) of the continuously enhanced or continuously weakened ambient brightness, which is set to 8, for example. If the values of the brightness detection signals transmitted by the brightness sensor and sensed by the brightness sensor (LightSensor_Input) received by the electronic device in the continuous 8 times are all greater than the values received in the previous time, it is considered that the ambient brightness is continuously enhanced, and the value of the LightSensor_Input received in the eighth time is determined as the effective brightness detection signal of the brightness sensor.

[0104] Similarly, if the values of the LightSensor_Input received in the continuous 8 times are all less than the values in the previous time, it is considered that the ambient brightness is continuously weakened, and the value received in the eighth time is determined as the effective brightness detection signal.

[0105] The time interval between the continuous preset times can be set according to the actual working condition, for example, it can be set to 100 ms, indicating that the electronic device will receive the brightness detection signal sensed by the brightness sensor once every 100 ms.

[0106] In addition, if the brightness detection signal input by the brightness sensor cannot be obtained for a continuous time period such as 2 s, the preset brightness detection signal can be used instead of the effective brightness detection signal.

[0107] In some embodiments, the preset brightness detection signal, for example, LightSensor_Input=100 lux, can also be set according to the vehicle condition in the actual working condition, which is not limited in the embodiments of the present application.

[0108] S202: determining a target brightness signal of the display screen according to the effective brightness detection signal and the manually adjusted brightness signal through a brightness fusion algorithm.

[0109] After the effective brightness detection signal of the brightness sensor and the manually adjusted brightness signal are determined, the brightness fusion algorithm is used for fusion calculation to determine the target brightness signal of the display screen.

[0110] In some embodiments, the brightness fusion algorithm can be, for example, as shown in formula (1): PWM t1 = (A + (B-A) * Lightsensor_input t1 / (Transmissionrate * I max )) / L max_day (1)

[0111] Wherein, PWM t1 represents the target brightness signal, Lightsensor_input t1 is the effective brightness detection signal, A=L min_night +(L max_night -L min_night )*U, B=L min_day +(L max_day -L min_day )*U, U=(User_input / 15) Gamma_2 is the manually adjusted brightness signal, Gamma_2 is the exponent of (User_input / 15), and User_input represents the current manual brightness adjustment level.

[0112] The brightness fusion algorithm shown in formula (1) can be a fusion algorithm generated according to the screen adjustment parameters of the vehicle shown in Table 1 below, which can be obtained by real vehicle calibration,

[0113] The default values of the screen adjustment parameters in Table 1 are exemplary, and can be set according to actual conditions in actual working conditions.

[0114] Table 1

[0115] It should be noted that the brightness fusion algorithm provided by the embodiments of the present application includes but is not limited to the fusion algorithm shown in formula (1) as listed above, which can also be other algorithms that are positively correlated with the target brightness signal of the display screen through the effective brightness detection signal and the manually adjusted brightness signal, and the embodiments of the present application do not limit this.

[0116] S203: adjusting the backlight brightness of the display screen according to the target brightness signal.

[0117] After the target brightness signal of the display screen is determined, the backlight brightness of the display screen can be adjusted according to the target brightness signal, so as to realize the control of the backlight brightness of the display screen.

[0118] In some embodiments, the backlight brightness of the display screen can be adjusted according to the target brightness signal in a step-by-step manner, so that the backlight brightness adjustment process can be more smooth, and a better brightness adjustment experience is presented to the driver or passenger.

[0119] The step S103a described above describes that if the change of the ambient brightness is detected, the effective brightness detection signal of the brightness sensor needs to be determined according to the brightness detection signal of the brightness sensor, and then the target brightness signal of the display screen is calculated by the brightness fusion algorithm combined with the manually adjusted brightness signal, and the backlight brightness of the display screen is automatically adjusted according to the target brightness signal, so that the brightness control method provided by the embodiments of the present application can determine the target brightness signal of the display screen on the basis of the manual brightness adjustment level according to the change of the ambient brightness in the driving scene where the ambient brightness changes, and then the backlight brightness of the display screen is adaptively adjusted according to the target brightness signal. As shown in FIG. 5, the determined target brightness signal, i.e., the brightness curve, is different for different manual brightness adjustment levels, so as to ensure that the user obtains better visual comfort when the ambient brightness changes in the driving scene. It should be noted that only the brightness curves corresponding to part of the brightness levels in the brightness level range are shown in FIG. 5, such as the brightness curves corresponding to the manual brightness adjustment levels of brightness level 15 (User_input_15), brightness level 12 (User_input_12), brightness level 9 (User_input_9) and brightness level 6 (User_input_6).

[0120] S103b: If the change of the ambient brightness is not detected, the backlight brightness of the display screen is automatically adjusted according to the manually adjusted brightness signal and the current brightness detection signal of the brightness sensor.

[0121] If the change of the ambient brightness is not detected, the effective brightness detection signal does not need to be determined, and the current brightness detection signal of the brightness sensor is used for fusion calculation to adjust the backlight brightness of the display screen.

[0122] In a possible design, the possible implementation of the step S103b includes:

[0123] The electronic device obtains the current brightness detection signal sensed by the brightness sensor, and determines the target brightness signal of the display screen by the brightness fusion algorithm according to the manually adjusted brightness signal and the current brightness detection signal of the brightness sensor. The brightness fusion algorithm can be, for example, as shown in formula (1). It should be noted that when formula (1) is used for fusion calculation in this step, Lightsensor_input t1The current brightness detection signal of the brightness sensor. After the target brightness signal of the display screen is determined, the backlight brightness of the display screen can be adjusted according to the target brightness signal, so as to realize the control of the backlight brightness of the display screen.

[0124] The foregoing steps S103a and S103b describe the brightness control method when the brightness automatic adjustment function is in the open state. In some working conditions, the brightness automatic adjustment function can be in the closed state. When the brightness automatic adjustment function is in the closed state, the brightness control method provided in the embodiments of the present application is executed after the manual adjustment brightness signal corresponding to the current manual brightness adjustment level of the display screen is obtained.

[0125] S103c: automatically adjusting the backlight brightness of the display screen according to the manual adjustment brightness signal and the default brightness detection signal of the brightness sensor.

[0126] When the brightness automatic adjustment function is in the closed state, it means that the adjustment of the backlight brightness of the display screen is not affected by the ambient brightness of the driving scene. For example, the target brightness signal of the display screen in this working condition can be calculated according to the manual adjustment brightness signal and the default brightness detection signal of the brightness sensor by using the brightness fusion algorithm shown in the above formula (1), and then the backlight brightness of the display screen is adjusted according to the target brightness signal. When the brightness fusion algorithm shown in formula (1) is used for calculation, the default brightness detection signal of the brightness sensor can be obtained by setting L max_day and L max_night equal in formula (1), and L min_night and L min_day equal, so that the calculation result target brightness signal is not affected by the input quantity of the brightness sensor.

[0127] It can be known from the description of the above embodiments that the brightness control method provided by the embodiments of the present application is based on the brightness automatic adjustment function of the display screen and the adaptive adjustment of the backlight brightness of the display screen according to the change of the ambient brightness on the basis of supporting the manual brightness adjustment level. For example, when the brightness automatic adjustment function of the display screen is in the open state, if it is detected that the ambient brightness changes, the target brightness signal of the display screen is calculated according to the manual adjustment brightness signal corresponding to the current manual brightness adjustment level and the effective brightness detection signal determined based on the brightness detection signal of the brightness sensor, and then the backlight brightness of the display screen is adjusted according to the target brightness signal; if it is not detected that the ambient brightness changes, the target brightness signal of the display screen is calculated according to the manual adjustment brightness signal corresponding to the current manual brightness adjustment level and the current brightness detection signal of the brightness sensor, so as to adjust the backlight brightness of the display screen according to the target brightness signal. On the contrary, when the brightness automatic adjustment function of the display screen is in the closed state, the target brightness signal of the display screen is calculated according to the manual adjustment brightness signal corresponding to the manual brightness adjustment level and the default brightness detection signal of the brightness sensor, and then the backlight brightness of the display screen is adjusted according to the obtained target brightness signal. The manual brightness adjustment of the display screen and the ambient brightness perceived by the brightness sensor are fused to calculate the target brightness signal of better visual comfort to adjust the backlight brightness of the display screen. The target brightness signal can be adaptive to the ambient brightness, overcomes the defect of poor visual experience caused by the manual brightness level and the fixed automatic brightness calibration in the related art, improves the driving visual experience when the driving scene changes, ensures that the user obtains better visual comfort, and improves the driving experience.

[0128] In a possible design, in order to make the driver and passenger feel no brightness change caused by adjusting the backlight brightness of the display screen, the adjusting of the backlight brightness of the display screen according to the target brightness signal in the above embodiments can adopt a step-by-step manner as shown in FIG. 6. FIG. 6 is a flowchart of another brightness control method provided by the embodiments of the present application. As shown in FIG. 6, the embodiments of the present application include the following steps.

[0129] S301: Obtain the current brightness signal of the backlight brightness of the display screen.

[0130] S302: Determine the brightness adjustment signal of the control period based on the step control strategy according to the current brightness signal and the target brightness signal.

[0131] S303: Step-by-step adjust the backlight brightness of the display screen to the target brightness according to the brightness adjustment signal in the control period.

[0132] First, the current brightness signal of the backlight brightness of the display screen is acquired, wherein the current brightness signal and the target brightness signal of the backlight brightness are both represented by a pulse width modulation (PWM) value of a backlight control circuit of the display screen. Then, the brightness adjustment signal of the control period is determined according to the current brightness signal and the target brightness signal based on the step control strategy shown in the following formula (2): Display_PWM t = PWMcurrent t’ + (PWMtarget(t'+t_user)-PWMcurrent t’ )*((t-t') / t_user) (2)

[0133] wherein PWMcurrent t’ represents the current (before adjustment) PWM value, i.e., the current brightness signal, which is a known quantity, t' represents the current time, for example, 10:00:05.000, PWMtarget(t'+t_user) represents the final PWM value to be adjusted, i.e., the target brightness signal, and t_user is a default value, for example, 200 ms, representing the total control period.

[0134] Therefore, t = [t', t'+t_user], assuming t = [10:00:05.000, 10:00:05.200], for example, the preset control period is 50 ms, i.e., formula (2) is calculated once every 50 ms (which can be adjusted according to the actual vehicle debugging effect), and a step-by-step adjustment diagram as shown in FIG. 7 can be obtained.

[0135] Assuming PWMcurrent t’ = 30%, and the PWMtarget(t'+t_user) to be adjusted = 50%, the brightness adjustment signals in the control period are as follows:

[0136] Display_PWM(t'+50ms) = 30%+(50%-30%)*1 / 4 = 35%;

[0137] Display_PWM(t'+100ms) = 30%+(50%-30%)*2 / 4 = 40%;

[0138] Display_PWM(t'+150ms) = 30%+(50%-30%)*3 / 4 = 45%;

[0139] Display_PWM(t'+200ms) = 30%+(50%-30%)*4 / 4 = 50%.

[0140] further step by step adjusts the backlight brightness of the display screen to the target brightness according to the brightness adjustment signal corresponding to each control period. If the calculation result Display_PWM t ≥ 100%, then Display_PWM t = 100%.

[0141] The brightness control method provided in the embodiments of the present application step by step adjusts the backlight brightness of the display screen to the target brightness according to the target brightness signal obtained through fusion calculation, so that the driver and passenger can not feel the brightness change caused by the adjustment of the backlight brightness of the display screen in the sense, and the driving visual comfort is ensured.

[0142] Further, the brightness sensor described in the above embodiments can use the sensor provided by the display screen, instead of the sunlight sensor in the related art. In terms of hardware configuration, it is not necessary to configure the brightness sensor in all display screens, and all display screens in the cabin can share the same brightness sensor, such as the brightness sensor of the center display screen, so as to reduce the implementation cost of the whole vehicle. For some vehicles that need to add the automatic brightness adjustment function, it is not necessary to increase the sunlight sensor, wire harness, bus signal link and other related software implementation schemes of the whole vehicle.

[0143] In some embodiments, the brightness sensor can be arranged at a specific position of the display screen, such as the upper left corner or the upper right corner of the display screen, which does not affect the driving line of sight, and has the advantages of improving the stability of the function implementation, such as avoiding the influence of external dirt, and accurately detecting the brightness in the cabin, which is more suitable for the user's use scene. The sunlight sensor is generally arranged at the front windshield position, which may be blocked by dirt, resulting in inaccurate detection of the external environment brightness of the whole vehicle.

[0144] FIG. 8 is a structural schematic diagram of a brightness control device provided in an embodiment of the present application. As shown in FIG. 8, the brightness control device 400 provided in the embodiment of the present application comprises:

[0145] The acquisition module 401 is configured to acquire the current manual brightness adjustment level of the vehicle display screen, and obtain the corresponding manual adjustment brightness signal according to the current manual brightness adjustment level.

[0146] The judgment module 402 is configured to judge whether the automatic brightness adjustment function of the display screen is in an open state.

[0147] The adjustment module 403 is configured to, if it is determined that the automatic brightness adjustment function is in the open state, automatically adjust the backlight brightness of the display screen according to the manual adjustment brightness signal and the brightness detection signal of the brightness sensor when the environmental brightness is detected to change.

[0148] In a possible design, the adjusting module 403 is specifically configured to:

[0149] determine a valid brightness detection signal of the brightness sensor according to the brightness detection signal of the brightness sensor;

[0150] determine a target brightness signal of the display screen according to the valid brightness detection signal and the manually adjusted brightness signal through a brightness fusion algorithm;

[0151] adjust the backlight brightness of the display screen according to the target brightness signal.

[0152] The brightness fusion algorithm is a fusion algorithm generated according to screen adjustment parameters of the vehicle, and the screen adjustment parameters are obtained by real vehicle calibration.

[0153] In a possible design, the adjusting module 403 is further configured to:

[0154] determine whether the brightness detection signals sensed by the brightness sensor in the continuous preset times are all greater than or less than the brightness detection signal in the previous time;

[0155] if yes, determine the brightness detection signal sensed by the brightness sensor in the first preset time as the valid brightness detection signal;

[0156] The brightness detection signals sensed in the continuous preset times are all greater than the brightness detection signal in the previous time, and the ambient brightness continuously increases; and the brightness detection signals sensed in the continuous preset times are all less than the brightness detection signal in the previous time, and the ambient brightness continuously decreases.

[0157] In a possible design, if no ambient brightness change is detected, the adjusting module 403 is further configured to:

[0158] automatically adjust the backlight brightness of the display screen according to the manually adjusted brightness signal and the current brightness detection signal of the brightness sensor.

[0159] In a possible design, the adjusting module 403 is further configured to:

[0160] obtain a current brightness detection signal of the brightness sensor;

[0161] determine a target brightness signal of the display screen according to the manually adjusted brightness signal and the current brightness detection signal of the brightness sensor through a brightness fusion algorithm;

[0162] adjust the backlight brightness of the display screen according to the target brightness signal.

[0163] In a possible design, if it is determined that the brightness automatic adjustment function is in the off state, the adjusting module 403 is further configured to:

[0164] The back light brightness of the display screen is automatically adjusted according to the manually adjusted brightness signal and the default brightness detection signal of the brightness sensor.

[0165] In a possible design, the adjusting module 403 is specifically configured to:

[0166] obtain a current brightness signal of the back light brightness of the display screen;

[0167] determine a brightness adjustment signal of a control period based on a step control strategy according to the current brightness and the target brightness signal;

[0168] stepwise adjust the back light brightness of the display screen to the target brightness according to the brightness adjustment signal in the control period;

[0169] The current brightness signal and the target brightness signal are both represented by pulse width modulation values of a back light control circuit of the display screen.

[0170] In a possible design, the display screen comprises at least one of an instrument display screen, a central control display screen, a co-pilot display screen, a rear seat display screen and an armrest display screen of the vehicle.

[0171] In a possible design, the brightness sensor is located at the upper left corner or the upper right corner of the display screen.

[0172] In a possible design, the display screen is provided with an adjusting control, and the adjusting control is used to switch on and off the brightness adjustment function.

[0173] The brightness control apparatus provided in the embodiments of the present application can perform the corresponding steps of the brightness control method in the method embodiments, and the implementation principles and technical effects are similar, which will not be described herein again.

[0174] FIG. 9 is a structural schematic diagram of an electronic device provided in the embodiments of the present application. As shown in FIG. 9, the electronic device 500 can include a processor 501 and a memory 502 connected with the processor 501.

[0175] The memory 502 is configured to store a program. Specifically, the program can include program code, and the program code includes computer execution instructions.

[0176] The memory 502 can include a high-speed RAM memory, and can also include a non-volatile memory (NoN-volatile memory), for example, at least one disk memory.

[0177] The processor 501 is configured to execute the computer execution instructions stored in the memory 502, so as to implement the brightness control method described above.

[0178] The processor 501 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to perform the operations of the embodiments of the present application.

[0179] The memory 502 can be independent or integrated with the processor 501. When the memory 502 is independent of the processor 501, the electronic device 500 can further include:

[0180] The bus 503 is used to connect the processor 501 and the memory 502. The bus can be an industry standard architecture (ISA) bus, a peripheral component (PCI) bus, an extended industry standard architecture (EISA) bus, or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like, but does not mean that there is only one bus or one type of bus.

[0181] Optionally, in a specific implementation, if the memory 502 and the processor 501 are integrated on a chip, the memory 502 and the processor 501 can communicate through an internal interface.

[0182] The present application also provides a computer readable storage medium, which can include a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes, and the like. Specifically, the computer readable storage medium stores computer execution instructions, and the computer execution instructions are used for the method in the above embodiments.

[0183] The present application also provides a computer program product, which includes computer execution instructions, and the computer instructions are executed by the processor to implement the method in the above embodiments.

[0184] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0185] It is to be understood that the application is not limited to the precise construction herein disclosed and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the claims that follow.

Claims

1. A luminance control method characterized by, The method comprises: acquiring a current manual brightness adjustment level of a display screen of a vehicle, and obtaining a corresponding manual adjustment brightness signal according to the current manual brightness adjustment level; judging whether a brightness automatic adjustment function of the display screen is in an open state; if yes, automatically adjusting a backlight brightness of the display screen according to the manual adjustment brightness signal and a brightness detection signal of a brightness sensor when a change in ambient brightness is detected.

2. The luminance control method according to claim 1, wherein The automatic adjustment of the backlight brightness of the display screen according to the manual adjustment brightness signal and the brightness detection signal of the brightness sensor comprises: determining a brightness effective detection signal of the brightness sensor according to the brightness detection signal of the brightness sensor; determining a target brightness signal of the display screen according to the brightness effective detection signal and the manual adjustment brightness signal through a brightness fusion algorithm; adjusting the backlight brightness of the display screen according to the target brightness signal; wherein the brightness fusion algorithm is a fusion algorithm generated according to screen adjustment parameters of the vehicle, and the screen adjustment parameters are obtained by real vehicle calibration on the vehicle.

3. The luminance control method according to claim 2, wherein The determination of the brightness effective detection signal of the brightness sensor according to the brightness detection signal of the brightness sensor comprises: judging whether the brightness detection signals sensed by the brightness sensor in continuous preset times are all greater than or less than a previous brightness detection signal; if yes, determining the brightness detection signal sensed by the brightness sensor in the first preset time as the brightness effective detection signal; wherein when the brightness detection signals sensed in continuous preset times are all greater than the previous brightness detection signal, the ambient brightness continuously increases; and when the brightness detection signals sensed in continuous preset times are all greater than the previous brightness detection signal, the ambient brightness continuously decreases.

4. The luminance control method according to claim 1, wherein if no change in the ambient brightness is detected, the method further comprises: automatically adjusting the backlight brightness of the display screen according to the manual adjustment brightness signal and a current brightness detection signal of the brightness sensor.

5. The luminance control method according to claim 4, wherein The automatic adjustment of the backlight brightness of the display screen according to the manual adjustment brightness signal and the current brightness detection signal of the brightness sensor comprises: acquiring the current brightness detection signal of the brightness sensor; determining a target brightness signal of the display screen according to the manual adjustment brightness signal and the current brightness detection signal of the brightness sensor through a brightness fusion algorithm; adjusting the backlight brightness of the display screen according to the target brightness signal.

6. The luminance control method according to claim 1, wherein if it is determined that the brightness automatic adjustment function is in a closed state, the method further comprises: automatically adjusting the backlight brightness of the display screen according to the manual adjustment brightness signal and a default brightness detection signal of the brightness sensor.

7. The brightness control method according to any one of claims 2 to 6, characterized by, The adjustment of the backlight brightness of the display screen according to the target brightness signal comprises: acquiring a current brightness signal of the backlight brightness of the display screen; determining a brightness adjustment signal of a control period based on a step control strategy according to the current brightness signal and the target brightness signal; stepwise adjusting the backlight brightness of the display screen to a target brightness according to the brightness adjustment signal in the control period; The current brightness signal and the target brightness signal are both represented by a pulse width modulation value of a backlight control circuit of the display screen.

8. The luminance control method according to claim 7, wherein The display screen comprises at least one of an instrument display screen, a central control display screen, a co-pilot display screen, a rear seat display screen, and an armrest display screen of the vehicle.

9. The luminance control method of claim 1, wherein The brightness sensor is located at an upper left corner or an upper right corner of the display screen.

10. The luminance control method of claim 1, wherein An adjusting control is arranged on the display screen, and the adjusting control is used to switch between an open state and a closed state of the automatic brightness adjusting function.

11. A luminance control device, characterized by comprising: The method comprises the following steps: a first obtaining step of obtaining a current manual brightness adjusting level of a display screen of a vehicle, and obtaining a corresponding manual adjusting brightness signal according to the current manual brightness adjusting level; a judging step of judging whether an automatic brightness adjusting function of the display screen is in an open state; a first adjusting step of, if it is determined that the automatic brightness adjusting function is in the open state, automatically adjusting a backlight brightness of the display screen according to the manual adjusting brightness signal and a brightness detection signal of a brightness sensor when detecting that an ambient brightness has changed.

12. An electronic device, comprising: The method comprises the following steps: a processor, and a memory connected with the processor in communication; the memory stores computer execution instructions; the processor executes the computer execution instructions stored in the memory to implement the brightness control method according to any one of claims 1-10.

13. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by the processor to implement the brightness control method according to any one of claims 1-10.

14. A computer program product comprising computer execution instructions, which are executed by a processor to implement the brightness control method according to claims 1-10.

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