Backlight adjusting method, device and system and display screen

Abstract

The invention provides a backlight adjustment method, device and system and a display screen, and the method comprises the steps: obtaining the current illuminance of the environment where the display screen is located, determining whether a backlight compensation condition is met or not based on a target adjustment coefficient and the current illuminance, determining the target adjustment coefficient based on a manual backlight adjustment value of the display screen, and if yes, determining that the backlight compensation condition is met. If yes, compensating a candidate backlight value under the current illuminance to obtain a target backlight value, and controlling a backlight source of the display screen to perform brightness adjustment based on the target backlight value, the candidate backlight value being determined based on a manual backlight adjustment value, and if not, controlling the backlight source of the display screen to perform brightness adjustment based on the candidate backlight value. Therefore, while the rationality of the backlight value of the display screen is ensured, the requirement of a user for the brightness of the display screen is met to the greatest extent.

Description

Technical Field

[0001] This application relates to the field of automatic control, and particularly to a backlight adjustment method, device, system and display screen. Background Art

[0002] For displays such as CMS (Camera Monitor System) streaming media rearview mirrors, the backlight value is usually automatically adjusted according to the illuminance value of the ambient light, so as to ensure the clarity and readability of the displayed content under different ambient light illuminances and provide a better visual experience.

[0003] Currently, the backlight of the display screen is usually adjusted according to the pre-set correspondence between the ambient light illuminance and the backlight value and the user's adjustment operation of the backlight value. It is difficult to ensure the rationality of the backlight value of the display screen while meeting the user's brightness requirements for the display screen. Summary of the Invention

[0004] To solve the above technical problems, this application provides a backlight adjustment method, device, system and display screen to solve the problem in the prior art that it is difficult to ensure the rationality of the backlight value of the display screen while meeting the user's brightness requirements for the display screen.

[0005] To achieve the above technical objectives, the embodiments of this application provide the following technical solutions:

[0006] In a first aspect, an embodiment of this specification provides a backlight adjustment method applied to a display screen. The method includes:

[0007] Obtain the current illuminance of the environment where the display screen is located;

[0008] Based on a target adjustment coefficient and the current illuminance, determine whether the backlight compensation condition is met. The target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen;

[0009] If it is met, compensate the candidate backlight value under the current illuminance to obtain a target backlight value, and control the backlight source of the display screen to adjust the brightness based on the target backlight value. The candidate backlight value is determined based on the manual backlight adjustment value;

[0010] If it is not met, control the backlight source of the display screen to adjust the brightness based on the candidate backlight value.

[0011] In an embodiment, the method for determining the target adjustment coefficient includes:

[0012] Based on the target illuminance and the initial correspondence between the ambient illuminance and the backlight value of the display screen, determine the initial backlight value of the display screen under the target illuminance; the target illuminance is the ambient illuminance corresponding to the manual backlight adjustment value;

[0013] Based on the difference between the manual backlight adjustment value and the initial backlight value, determine the target adjustment coefficient, and the target adjustment coefficient is positively correlated with the difference between the manual backlight adjustment value and the initial backlight value.

[0014] In one implementation, the determining whether the backlight compensation condition is satisfied based on the target adjustment coefficient and the current illuminance includes:

[0015] If the target adjustment coefficient is less than 0 and the current illuminance is greater than the target illuminance, it is determined that the backlight compensation condition is satisfied;

[0016] If the target adjustment coefficient is greater than or equal to 0, and / or the current illuminance is less than or equal to the target illuminance, it is determined that the backlight compensation condition is not satisfied.

[0017] In a second aspect, an embodiment of the present specification provides another backlight adjustment method, which is applied to a display screen, and the method includes:

[0018] Obtain the current illuminance of the environment where the display screen is located;

[0019] If it is determined that the backlight compensation condition is satisfied based on the target adjustment coefficient and the current illuminance, then compensate the candidate backlight value based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance, the target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen, the target illuminance is the ambient illuminance corresponding to the manual backlight adjustment value, the candidate backlight value is determined based on the current illuminance and the target correspondence, and the target correspondence is obtained by adjusting the initial correspondence between the ambient illuminance and the backlight value of the display screen based on the target adjustment coefficient;

[0020] Based on the target backlight value, control the backlight source of the display screen to perform brightness adjustment.

[0021] In one implementation, the compensating the candidate backlight value based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance includes:

[0022] Based on the target adjustment coefficient and the candidate backlight value, determine a correction coefficient;

[0023] Based on the correction coefficient, correct the difference between the current illuminance and the target illuminance to obtain a backlight compensation value;

[0024] Compensate the candidate backlight value based on the backlight compensation value to obtain the target backlight value of the display screen under the current illuminance.

[0025] In one implementation manner, determining the correction coefficient based on the target adjustment coefficient and the candidate backlight value includes:

[0026] Based on the candidate backlight value and the value range of the backlight value of the display screen in the target correspondence, determine the initial backlight level corresponding to the candidate backlight value;

[0027] Based on the magnitude relationship between the current illuminance and the predetermined illuminance, and the initial backlight level corresponding to the candidate backlight value, determine the target backlight level corresponding to the candidate backlight value;

[0028] Based on the target adjustment coefficient and the target backlight level corresponding to the candidate backlight value, determine the correction coefficient, where the correction coefficient is negatively correlated with the target adjustment coefficient, and the correction coefficient is positively correlated with the target backlight level.

[0029] In one implementation manner, determining the target backlight level corresponding to the candidate backlight value based on the magnitude relationship between the current illuminance and the predetermined illuminance, and the initial backlight level corresponding to the candidate backlight value includes:

[0030] If the current illuminance is greater than the predetermined illuminance, determine a backlight level compensation value based on the difference between the current illuminance and the predetermined illuminance, and compensate the initial backlight level corresponding to the candidate backlight value based on the backlight level compensation value to obtain the target backlight level corresponding to the candidate backlight value;

[0031] If the current illuminance is less than or equal to the predetermined illuminance, determine the initial backlight level corresponding to the candidate backlight value as the target backlight level corresponding to the candidate backlight value.

[0032] In one implementation manner, the method for determining the target correspondence includes:

[0033] Based on the target adjustment coefficient, adjust the backlight value corresponding to each environmental illuminance in the initial correspondence to obtain an initial backlight adjustment value corresponding to each environmental illuminance;

[0034] Based on the backlight value limit in the initial correspondence, perform a correction process on the initial backlight adjustment value corresponding to each environmental illuminance to obtain a target backlight adjustment value corresponding to each environmental illuminance;

[0035] Generate the target correspondence based on the target backlight adjustment values corresponding to the respective environmental illuminances.

[0036] In a third aspect, an embodiment of this specification provides a backlight adjustment device, which is applied to a display screen. The device includes:

[0037] A first processing module, configured to obtain the current illuminance of the environment where the display screen is located;

[0038] A second processing module, configured to determine whether the backlight compensation condition is satisfied based on a target adjustment coefficient and the current illuminance, where the target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen;

[0039] A third processing module, configured to, if the condition is satisfied, compensate the candidate backlight value under the current illuminance to obtain a target backlight value, and control the backlight of the display screen to perform brightness adjustment based on the target backlight value, where the candidate backlight value is determined based on the manual backlight adjustment value;

[0040] If the condition is not satisfied, control the backlight of the display screen to perform brightness adjustment based on the candidate backlight value.

[0041] In a fourth aspect, an embodiment of this specification provides another backlight adjustment device, which is applied to a display screen. The device includes:

[0042] A fourth processing module, configured to obtain the current illuminance of the environment where the display screen is located;

[0043] A fifth processing module, configured to, if it is determined that the backlight compensation condition is satisfied based on a target adjustment coefficient and the current illuminance, compensate the candidate backlight value based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance, where the target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen, the target illuminance is the environmental illuminance corresponding to the manual backlight adjustment value, the candidate backlight value is determined based on the current illuminance and the target correspondence, and the target correspondence is obtained by adjusting the initial correspondence between the environmental illuminance and the backlight value of the display screen based on the target adjustment coefficient;

[0044] A sixth processing module, configured to control the backlight of the display screen to perform brightness adjustment based on the target backlight value.

[0045] In a fifth aspect, an embodiment of this specification provides a backlight adjustment system, which is applied to a display screen. The backlight adjustment system includes a light collection module and a controller. The light collection module is configured to detect the current illuminance of the environment where the display screen is located;

[0046] The controller includes at least one processor and at least one memory. A computer program is stored in the memory. When the computer program is executed by the processor, the backlight adjustment method described in any one of the above is implemented.

[0047] In a sixth aspect, an embodiment of the present specification provides a display screen, which includes a backlight source and the backlight adjustment system described above.

[0048] In a seventh aspect, an embodiment of the present specification provides a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is run by a processor, the backlight adjustment method described in any one of the above is implemented.

[0049] In an eighth aspect, an embodiment of the present specification provides a computer program product or a computer program. The computer program product includes a computer program, and the computer program is stored in a computer-readable storage medium. A processor of the computer device reads the computer program from the computer-readable storage medium. When the processor executes the computer program, the backlight adjustment method described in any one of the above is implemented.

[0050] It can be seen from the above technical solutions that the embodiments of the present application provide a backlight adjustment method, device, system and display screen. This solution is applied to a display screen. On the one hand, by obtaining the current illuminance of the environment where the display screen is located, and determining whether the backlight compensation condition is satisfied based on the target adjustment coefficient and the current illuminance, the target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen. If it is satisfied, the candidate backlight value under the current illuminance is compensated to obtain the target backlight value, and the backlight source of the display screen is controlled to perform brightness adjustment based on the target backlight value. The candidate backlight value is determined based on the manual backlight adjustment value. If it is not satisfied, the backlight source of the display screen is controlled to perform brightness adjustment based on the candidate backlight value, so as to ensure the rationality of the backlight value of the display screen while maximizing the brightness requirements of the user for the display screen.

[0051] On the other hand, by obtaining the current illuminance of the environment where the display screen is located, if it is determined that the backlight compensation condition is met based on the target adjustment coefficient and the current illuminance, the candidate backlight value is compensated based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance, so as to control the backlight source of the display screen for brightness adjustment based on the target backlight value. Among them, the target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen, the target illuminance is the environmental illuminance corresponding to the manual backlight adjustment value, the candidate backlight value is determined based on the current illuminance and the target correspondence relationship, and the target correspondence relationship is obtained by adjusting the initial correspondence relationship between the environmental illuminance and the backlight value of the display screen based on the target adjustment coefficient. That is, the candidate backlight value is the backlight value determined according to the user's needs. Therefore, by compensating the candidate backlight value with the difference between the current illuminance and the target illuminance, it is possible to ensure the rationality of the backlight value of the display screen while maximizing the satisfaction of the user's brightness requirements for the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0053] Figure 1 It is a schematic flowchart of a backlight adjustment method provided for the embodiments of this specification.

[0054] Figure 2 It is a schematic flowchart of another backlight adjustment method provided for the embodiments of this specification.

[0055] Figure 3 It is a schematic structural diagram of a backlight adjustment device provided for the embodiments of this specification.

[0056] Figure 4 It is a schematic structural diagram of another backlight adjustment device provided for the embodiments of this specification.

[0057] Figure 5 It is a schematic structural diagram of a backlight adjustment system provided for the embodiments of this specification. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0058] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of this specification should have the ordinary meaning understood by those of ordinary skill in the art to which this specification belongs. The "first", "second" and similar terms used in the embodiments of this specification do not represent any order, quantity or importance, but are only used to avoid confusion of components.

[0059] Unless otherwise required by the context, throughout the specification, "a plurality of" means "at least two", and "comprising" is construed in an open, inclusive sense, i.e., "including, but not limited to". In the description of the specification, terms such as "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" are intended to indicate that specific features, structures, materials, or characteristics related to the embodiment or example are included in at least one embodiment or example of this specification. The schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0060] Next, the technical solutions in the embodiments of this specification will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all the embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this specification.

[0061] Overview

[0062] As described in the background art, display screens such as CMS streaming media rearview mirrors usually automatically adjust the backlight value according to the illuminance value of the ambient light, so as to ensure the clarity and readability of the displayed content and provide a better visual experience under different ambient light illuminances.

[0063] Currently, the backlight of the display screen is usually adjusted according to the pre-set correspondence between the ambient light illuminance and the backlight value and the user's adjustment operation of the backlight value. For example, during the process of adjusting the backlight value of the display screen according to the ambient light illuminance, an initial backlight value is usually determined according to the current illuminance of the environment and the correspondence, and the initial backlight value is adjusted according to the user's most recent adjustment operation of the backlight value, and the backlight value of the display screen is adjusted according to the adjusted backlight value. However, during the process of adjusting the initial backlight value according to the user's most recent adjustment operation of the backlight value, it is very easy to cause the adjusted backlight value to be unreasonable, so that it is difficult to ensure the reasonableness of the backlight value of the display screen on the premise of meeting the user's brightness requirement for the display screen, and further, it is impossible to ensure the clarity and readability of the content displayed on the display screen.

[0064] To solve the problem that it is difficult to ensure the rationality of the backlight value of a display screen while meeting the user's brightness requirements for the display screen in traditional methods, in the technical solution of this application, a backlight adjustment scheme is provided. This scheme obtains the current illuminance of the environment where the display screen is located, and determines whether the backlight compensation condition is met based on the target adjustment coefficient and the current illuminance. The target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen. If it is met, the candidate backlight value under the current illuminance is compensated to obtain the target backlight value, and the backlight source of the display screen is controlled to adjust the brightness based on the target backlight value. The candidate backlight value is determined based on the manual backlight adjustment value. If it is not met, the backlight source of the display screen is controlled to adjust the brightness based on the candidate backlight value, so as to be able to ensure the rationality of the backlight value of the display screen while maximizing the satisfaction of the user's brightness requirements for the display screen.

[0065] In addition, in the technical solution of this application, another backlight adjustment scheme is also provided. This scheme obtains the current illuminance of the environment where the display screen is located. If it is determined that the backlight compensation condition is met based on the target adjustment coefficient and the current illuminance, the candidate backlight value is compensated based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance, so as to control the backlight source of the display screen to adjust the brightness based on the target backlight value. Among them, the target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen, the target illuminance is the environmental illuminance corresponding to the manual backlight adjustment value, the candidate backlight value is determined based on the current illuminance and the target correspondence relationship, and the target correspondence relationship is obtained by adjusting the initial correspondence relationship between the environmental illuminance and the backlight value of the display screen based on the target adjustment coefficient. That is, the candidate backlight value is the backlight value determined according to the user's needs. Therefore, by compensating the candidate backlight value with the difference between the current illuminance and the target illuminance, it is possible to ensure the rationality of the backlight value of the display screen while maximizing the satisfaction of the user's brightness requirements for the display screen.

[0066] Based on the above inventive concept, the backlight adjustment method provided by the embodiments of this specification will be described exemplarily below.

[0067] Exemplary Method

[0068] The embodiments of this specification provide a backlight adjustment method, which is applied to a display screen, as Figure 1 shown, and this method includes:

[0069] S101. Obtain the current illuminance of the environment where the display screen is located.

[0070] Specifically, the display screen can be a control panel, or a display screen set on a terminal. The terminal can be a vehicle, a mobile phone, a tablet, a computer, a camera, etc. For example, the display screen can be a CMS streaming rearview mirror.

[0071] The current illuminance of the environment where the display screen is located, that is, the detected value of the illuminance of the environment where the display screen is located at the current moment. In implementation, an illumination acquisition module can be set to obtain the current illuminance of the environment where the display screen is located in real time through the illumination acquisition module.

[0072] S102. Determine whether the backlight compensation condition is satisfied based on the target adjustment coefficient and the current illuminance, where the target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen.

[0073] Specifically, the target adjustment coefficient can be determined based on the manual backlight adjustment value of the display screen, and is used to characterize the adjustment direction and adjustment amplitude of the user for the backlight value of the display screen on the basis of the initial correspondence between the ambient illuminance and the backlight value of the display screen. This initial correspondence can be a pre-set correspondence. For example, it can be a change curve of the backlight value with the ambient illuminance, or a mapping table. In the initial correspondence, the backlight value of the display screen increases as the ambient illuminance increases.

[0074] In implementation, the target adjustment coefficient can be determined according to the user's most recent manual backlight adjustment operation for the display screen. For example, in response to the manual backlight adjustment operation, the manual backlight adjustment value can be determined, and the target adjustment coefficient can be determined based on the difference between the manual backlight adjustment value and the initial backlight value. Thus, when the ambient illuminance changes, the backlight value of the display screen can be adjusted based on the target adjustment coefficient and the initial correspondence. It can be understood that when the display screen is powered off, the target adjustment coefficient can be memorized during power-off, or the target adjustment coefficient can not be memorized during power-off. That is, when the target adjustment coefficient is not memorized during power-off, after the display screen is started, the target adjustment coefficient does not exist, that is, the target adjustment coefficient is a null value. In addition, the target adjustment coefficients corresponding to different users can also be stored based on the user's login information, so as to meet the brightness requirements of different users for the display screen.

[0075] Among them, if the target adjustment coefficient does not exist, there is no need to judge whether the backlight compensation condition is satisfied. At this time, the target backlight value of the display screen under the current illuminance can be determined based on the current illuminance and the initial correspondence between the ambient illuminance and the backlight value of the display screen.

[0076] If the target adjustment coefficient exists, it is possible to further determine whether the backlight compensation condition is met based on the target adjustment coefficient and the current illuminance. Among them, whether the backlight compensation condition is met can indicate whether the candidate backlight value of the display screen under the current illuminance is reasonable. If it is reasonable, the backlight compensation condition is not met, that is, under the current illuminance, the candidate backlight value can ensure the clarity and readability of the content displayed on the display screen. If it is not reasonable, the backlight compensation condition is met, that is, under the current illuminance, the candidate backlight value cannot ensure the clarity and readability of the content displayed on the display screen.

[0077] In implementation, the candidate backlight value of the display screen under the current illuminance can be determined based on the manual backlight adjustment value. For example, the initial correspondence between the ambient illuminance and the backlight value of the display screen can be adjusted through the target adjustment coefficient to obtain the target correspondence. That is, the target correspondence is the correspondence between the ambient illuminance and the backlight value of the display screen obtained by adjusting the initial correspondence according to the user's manual backlight adjustment operation, and based on the current illuminance and this target correspondence, the candidate backlight value of the display screen under the current illuminance is determined.

[0078] S103. If it is satisfied, compensate the candidate backlight value under the current illuminance to obtain the target backlight value, and control the backlight source of the display screen to adjust the brightness based on the target backlight value. The candidate backlight value is determined based on the manual backlight adjustment value.

[0079] If it is not satisfied, control the backlight source of the display screen to adjust the brightness based on the candidate backlight value.

[0080] Specifically, if the backlight compensation condition is met, the candidate backlight value under the current illuminance can be compensated to obtain the target backlight value of the display screen under the current illuminance, and the backlight source of the display screen is controlled to adjust the brightness based on this target backlight value.

[0081] Among them, in the process of compensating the candidate backlight value under the current illuminance, the candidate backlight value under the current illuminance can be compensated based on the preset backlight compensation value, and can also be compensated based on the difference between the current illuminance and the target illuminance. The target illuminance is the ambient illuminance corresponding to the manual backlight adjustment value, that is, the detected value of the illuminance of the environment where the display screen is located during the user's most recent manual backlight adjustment of the display screen.

[0082] Optionally, in the process of compensating the candidate backlight value of the display screen at the current illuminance based on the difference between the current illuminance and the target illuminance, the backlight compensation value can be determined based on the difference between the current illuminance and the target illuminance, and the candidate backlight value of the display screen at the current illuminance can be compensated based on the backlight compensation value. Among them, the specific method for determining the backlight compensation value based on the difference between the current illuminance and the target illuminance can be set according to actual needs. For example, the difference between the current illuminance and the target illuminance can be corrected to obtain the backlight compensation value based on a correction coefficient. The correction coefficient can be a preset value, and can also be determined according to the target adjustment coefficient and / or the candidate backlight value. For example, the correction coefficient can be determined based on a predetermined correspondence relationship among the target adjustment coefficient, the candidate backlight value, and the correction coefficient. In addition, the correction coefficient can also be determined based on the difference between the current illuminance and the target illuminance and a predetermined correspondence relationship between the illuminance difference and the correction coefficient.

[0083] Thus, by compensating the candidate backlight value of the display screen at the current illuminance, it is possible to maximize the user's brightness requirement for the display screen while ensuring the clarity and readability of the content displayed on the display screen.

[0084] In addition, if the backlight compensation condition is not met, the backlight source of the display screen can be directly controlled to adjust the brightness based on the candidate backlight value of the display screen at the current illuminance, so as to adjust the backlight value of the display screen to the candidate backlight value, thereby maximizing the user's brightness requirement for the display screen while ensuring the clarity and readability of the content displayed on the display screen.

[0085] In implementation, in the process of controlling the backlight source of the display screen to adjust the brightness, the target PWM (Pulse Width Modulation) duty cycle of the backlight source can be determined according to the backlight value to which the display screen is to be adjusted, and the backlight source of the display screen can be controlled to adjust the brightness based on the target PWM duty cycle.

[0086] In a feasible implementation manner, the method for determining the target adjustment coefficient includes:

[0087] Based on the target illuminance and the initial correspondence relationship between the ambient illuminance and the backlight value of the display screen, determine the initial backlight value of the display screen under the target illuminance; the target illuminance is the ambient illuminance corresponding to the manual backlight adjustment value;

[0088] Based on the difference between the manual backlight adjustment value and the initial backlight value, determine the target adjustment coefficient, and the target adjustment coefficient is positively correlated with the difference between the manual backlight adjustment value and the initial backlight value.

[0089] Specifically, a brightness adjustment module can be set on the display screen. The brightness adjustment module can be a brightness adjustment button, or a brightness adjustment component such as a brightness adjustment progress bar set on the display interface of the display screen, and can be specifically set according to actual needs. The user can adjust the brightness of the display screen to a suitable brightness through the brightness adjustment module.

[0090] In implementation, in response to the user's manual backlight adjustment operation, a manual backlight adjustment value can be determined, and the ambient light intensity corresponding to the manual backlight adjustment value can be recorded. Moreover, the ambient light intensity corresponding to the manual backlight adjustment value can be used as the target light intensity.

[0091] Meanwhile, based on the target light intensity and the initial correspondence between the ambient light intensity and the backlight value of the display screen, the initial backlight value of the display screen under the target light intensity can be determined.

[0092] Among them, the difference between the manual backlight adjustment value and the initial backlight value can be obtained, and based on this difference, a target adjustment coefficient can be determined and stored. The target adjustment coefficient is positively correlated with this difference, that is, the larger this difference is, the larger the target adjustment coefficient is, and the smaller this difference is, the smaller the target adjustment coefficient is. Meanwhile, based on the target adjustment coefficient, the initial correspondence between the ambient light intensity and the backlight value of the display screen can be adjusted to obtain a target correspondence. Thus, when the ambient light intensity changes, based on this target correspondence and the real-time ambient light intensity, the candidate backlight value of the display screen under the corresponding ambient light intensity can be determined, so as to effectively meet the brightness requirements of different users for the display screen.

[0093] Optionally, in the process of determining the target adjustment coefficient based on the difference between the manual backlight adjustment value and the initial backlight value, the ratio of this difference to the initial backlight value can be used as the target adjustment coefficient.

[0094] In a feasible implementation manner, determining whether the backlight compensation condition is satisfied based on the target adjustment coefficient and the current light intensity includes:

[0095] If the target adjustment coefficient is less than 0 and the current light intensity is greater than the target light intensity, it is determined that the backlight compensation condition is satisfied;

[0096] If the target adjustment coefficient is greater than or equal to 0, and / or the current light intensity is less than or equal to the target light intensity, it is determined that the backlight compensation condition is not satisfied.

[0097] Specifically, if the target adjustment coefficient is less than 0, it indicates that the manual backlight adjustment value is less than the initial backlight value, that is, the user adjusts the backlight value of the display screen in the direction of decreasing brightness. At this time, the magnitude relationship between the current light intensity and the target light intensity can be further obtained.

[0098] Among them, if the current illuminance is greater than the target illuminance, it indicates that the environment has brightened. At this time, if the backlight value corresponding to the current illuminance in the target correspondence is used to adjust the backlight of the display screen, there is a risk that the display screen is too dark. Therefore, it can be determined that the backlight compensation condition is met, and by performing backlight compensation on the display screen, the rationality of the backlight value of the display screen can be effectively ensured, and then the clarity and readability of the content displayed on the display screen can be effectively improved.

[0099] If the current illuminance is equal to the target illuminance, it indicates that the current illuminance is the same as the ambient illuminance during the user's manual backlight adjustment process. At this time, the backlight value corresponding to the current illuminance in the target correspondence is the manually determined backlight adjustment value according to the user's manual backlight adjustment operation, which can meet the user's brightness requirement for the display screen, and there is no need for backlight compensation, that is, the backlight compensation condition is not met.

[0100] If the current illuminance is less than the target illuminance, it indicates that the environment has darkened. At this time, whether the user adjusts the backlight value of the display screen in the direction of decreasing brightness or increasing brightness during the manual backlight adjustment process, it will not cause the display screen to be too dark to affect the clarity and readability of the displayed content, and there is no need for backlight compensation, that is, the backlight compensation condition is not met.

[0101] In addition, if the target adjustment coefficient is equal to 0, it indicates that the manually adjusted backlight value is equal to the initial backlight value, that is, the user has not effectively adjusted the backlight value of the display screen. At this time, the target backlight value of the display screen can be determined according to the initial correspondence between the ambient illuminance and the backlight value of the display screen. Since this initial correspondence is pre-configured, there is no need for backlight compensation, that is, the backlight compensation condition is not met.

[0102] If the target adjustment coefficient is greater than 0, it indicates that the manually adjusted backlight value is greater than the initial backlight value, that is, the user adjusts the backlight value of the display screen in the direction of increasing brightness. Therefore, when the ambient illuminance changes, adjusting the backlight of the display screen according to the backlight value corresponding to the current illuminance in the target correspondence will not cause the display screen to be too dark, and there is no need for backlight compensation, that is, the backlight compensation condition is not met.

[0103] Therefore, through the method of the embodiment of the present application, while ensuring the clarity and readability of the content displayed on the display screen, the user's brightness requirement for the display screen can be maximally met.

[0104] The embodiment of this specification also provides another backlight adjustment method, which is applied to a display screen, as Figure 2 shown. This method includes:

[0105] S201. Obtain the current illuminance of the environment where the display screen is located.

[0106] Specifically, the display screen can be a control panel or a display screen set on a terminal such as a vehicle, a mobile phone, a tablet computer, a computer, a camera, etc. For example, the display screen can be a CMS streaming rearview mirror.

[0107] The current illuminance of the environment where the display screen is located, that is, the detected value of the illuminance of the environment where the display screen is located at the current moment. In implementation, an illuminance acquisition module can be set to obtain the current illuminance of the environment where the display screen is located in real time through the illuminance acquisition module.

[0108] S202. If it is determined that the backlight compensation condition is satisfied based on the target adjustment coefficient and the current illuminance, then compensate the candidate backlight value based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance. The target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen. The target illuminance is the environmental illuminance corresponding to the manual backlight adjustment value. The candidate backlight value is determined based on the current illuminance and the target correspondence. The target correspondence is obtained by adjusting the initial correspondence between the environmental illuminance and the backlight value of the display screen based on the target adjustment coefficient.

[0109] Specifically, in the process of determining the target backlight value of the display screen according to the current illuminance, it can be first determined whether there is a target adjustment coefficient. The target adjustment coefficient can be determined based on the manual backlight adjustment value of the display screen, and is used to characterize the adjustment direction and adjustment amplitude of the user for the backlight value of the display screen based on the initial correspondence between the environmental illuminance and the backlight value of the display screen. This initial correspondence can be a pre-set correspondence. For example, it can be a change curve of the backlight value with the environmental illuminance, or a mapping table. In the initial correspondence, the backlight value of the display screen increases as the environmental illuminance increases.

[0110] In implementation, the target adjustment coefficient can be determined according to the user's most recent manual backlight adjustment operation on the display screen. For example, in response to the manual backlight adjustment operation, the manual backlight adjustment value can be determined, and the target adjustment coefficient can be determined based on the difference between the manual backlight adjustment value and the initial backlight value. Thus, when the environmental illuminance changes, the backlight value of the display screen can be adjusted based on the target adjustment coefficient and the initial correspondence. It can be understood that when the display screen is powered off, the target adjustment coefficient can be power-off memorized, or the target adjustment coefficient can not be power-off memorized. That is, when the target adjustment coefficient is not power-off memorized, after the display screen is started, the target adjustment coefficient does not exist, that is, the target adjustment coefficient is a null value. In addition, the target adjustment coefficients corresponding to different users can also be stored based on the user's login information, so as to meet the brightness requirements of different users for the display screen.

[0111] Among them, if the target adjustment coefficient does not exist, the target backlight value of the display screen under the current illuminance can be determined based on the initial correspondence between the current illuminance and the backlight value of the display screen and the ambient illuminance.

[0112] If the target adjustment coefficient exists, it can be further determined whether the backlight compensation condition is satisfied based on the target adjustment coefficient and the current illuminance. Among them, whether the backlight compensation condition is satisfied can characterize whether the candidate backlight value of the display screen under the current illuminance is reasonable. If it is reasonable, the backlight compensation condition is not satisfied, that is, under the current illuminance, the candidate backlight value can ensure the clarity and readability of the content displayed on the display screen. If it is unreasonable, the backlight compensation condition is satisfied, that is, under the current illuminance, the candidate backlight value cannot ensure the clarity and readability of the content displayed on the display screen. The candidate backlight value of the display screen under the current illuminance is determined based on the current illuminance and the target correspondence. Among them, the initial correspondence between the ambient illuminance and the backlight value of the display screen can be adjusted by the target adjustment coefficient to obtain the target correspondence, that is, the target correspondence is the correspondence between the ambient illuminance and the backlight value of the display screen obtained by adjusting the initial correspondence according to the user's manual backlight adjustment operation.

[0113] In implementation, if the backlight compensation condition is not satisfied, the candidate backlight value of the display screen under the current illuminance can be directly used as the target backlight value of the display screen under the current illuminance.

[0114] If the backlight compensation condition is satisfied, the candidate backlight value of the display screen under the current illuminance can be compensated based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance. The target illuminance is the ambient illuminance corresponding to the manual backlight adjustment value, that is, the detected value of the illuminance of the environment where the display screen is located during the user's most recent manual backlight adjustment of the display screen.

[0115] Among them, in the process of compensating the candidate backlight value of the display screen under the current illuminance based on the difference between the current illuminance and the target illuminance, the backlight compensation value can be determined based on the difference between the current illuminance and the target illuminance, and the candidate backlight value of the display screen under the current illuminance can be compensated based on the backlight compensation value. The specific method for determining the backlight compensation value based on the difference between the current illuminance and the target illuminance can be set according to actual needs. For example, the difference between the current illuminance and the target illuminance can be corrected to obtain the backlight compensation value based on a correction coefficient. The correction coefficient can be a preset value, and can also be determined according to the target adjustment coefficient and / or the candidate backlight value. For example, the correction coefficient can be determined based on a predetermined correspondence relationship among the target adjustment coefficient, the candidate backlight value, and the correction coefficient. In addition, the correction coefficient can also be determined based on the difference between the current illuminance and the target illuminance and a predetermined correspondence relationship between the illuminance difference and the correction coefficient.

[0116] Thus, by compensating the candidate backlight value of the display screen under the current illuminance, while ensuring the rationality of the backlight value of the display screen, the brightness requirements of users for the display screen can be maximally met.

[0117] S203. Based on the target backlight value, control the backlight source of the display screen to perform brightness adjustment.

[0118] Specifically, after determining the target backlight value of the display screen under the current illuminance, the backlight source of the display screen can be controlled based on the target backlight value to perform brightness adjustment, so as to adjust the backlight value of the display screen to the target backlight value, thereby ensuring the clarity and readability of the content displayed on the display screen while maximally meeting the brightness requirements of users for the display screen.

[0119] In implementation, based on the target backlight value of the display screen under the current illuminance, the target PWM (Pulse Width Modulation) duty cycle of the backlight source can be determined, and based on the target PWM duty cycle, the backlight source of the display screen can be controlled to perform brightness adjustment.

[0120] It can be seen that the method of the embodiment of the present application obtains the current illuminance of the environment where the display screen is located. If it is determined that the backlight compensation condition is satisfied based on the target adjustment coefficient and the current illuminance, the candidate backlight value is compensated based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance, so as to control the backlight source of the display screen for brightness adjustment based on the target backlight value. Among them, the target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen, the target illuminance is the environmental illuminance corresponding to the manual backlight adjustment value, the candidate backlight value is determined based on the current illuminance and the target correspondence, and the target correspondence is obtained by adjusting the initial correspondence between the environmental illuminance and the backlight value of the display screen based on the target adjustment coefficient. That is, the candidate backlight value is the backlight value determined according to the user's needs. Therefore, compensating the candidate backlight value based on the difference between the current illuminance and the target illuminance can ensure the rationality of the backlight value of the display screen while maximizing the satisfaction of the user's brightness requirements for the display screen.

[0121] In a feasible implementation manner, the compensating the candidate backlight value based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance includes:

[0122] Determine a correction coefficient based on the target adjustment coefficient and the candidate backlight value;

[0123] Perform a correction process on the difference between the current illuminance and the target illuminance based on the correction coefficient to obtain a backlight compensation value;

[0124] Compensate the candidate backlight value based on the backlight compensation value to obtain the target backlight value of the display screen under the current illuminance.

[0125] Specifically, in the process of compensating the candidate backlight value based on the difference between the current illuminance and the target illuminance, a correction coefficient can be determined based on the target adjustment coefficient and the candidate backlight value. For example, the correction coefficient can be determined based on the target adjustment coefficient, the candidate backlight value, and the predetermined correspondence between the target adjustment coefficient and the candidate backlight value and the correction coefficient. The predetermined correspondence can be a function expression, a mapping table, a machine learning model, etc., and can be specifically set according to actual needs.

[0126] Among them, the correction coefficient can be negatively correlated with the target adjustment coefficient, that is, the larger the target adjustment coefficient, the smaller the correction coefficient, and vice versa, the smaller the target adjustment coefficient, the larger the correction coefficient, so as to effectively avoid the situation where the user adjusts the backlight value of the display screen in the direction of dimming, and the brightness of the display screen is too dim to ensure the clarity and readability of the content displayed on the display screen. At the same time, the correction coefficient can also be positively correlated with the candidate backlight value or the backlight level corresponding to the candidate backlight value, that is, the larger the candidate backlight value or the backlight level corresponding to the candidate backlight value, the higher the brightness that the display screen needs to display, and the larger the correction coefficient. Conversely, the smaller the candidate backlight value or the backlight level corresponding to the candidate backlight value, the lower the brightness that the display screen needs to display, and the smaller the correction coefficient, so as to effectively ensure the clarity and readability of the content displayed on the display screen.

[0127] In implementation, the difference between the current illuminance and the target illuminance can be corrected based on the correction coefficient to obtain a backlight compensation value. For example, the product of the correction coefficient and the difference between the current illuminance and the target illuminance can be used as the backlight compensation value.

[0128] Among them, the candidate backlight value can be compensated based on the backlight compensation value to obtain the target backlight value of the display screen under the current illuminance. For example, the backlight compensation value and the candidate backlight value of the display screen under the current illuminance can be summed, and the sum result can be used as the target backlight value of the display screen under the current illuminance. The target backlight value of the display screen under the current illuminance can also be determined based on the sum result and the backlight upper limit value of the display screen. For example, when the sum result is greater than or equal to the backlight upper limit value, the backlight upper limit value is determined as the target backlight value of the display screen under the current illuminance. When the sum result is less than the backlight upper limit value, the sum result is determined as the target backlight value of the display screen under the current illuminance.

[0129] Therefore, the embodiment of the present application determines the correction coefficient based on the target adjustment coefficient and the candidate backlight value, and corrects the difference between the current illuminance and the target illuminance based on the correction coefficient to obtain the backlight compensation value, so as to compensate the candidate backlight value based on the backlight compensation value to obtain the target backlight value of the display screen under the current illuminance, which can further improve the rationality of the obtained target backlight value after compensation. Furthermore, in the process of controlling the backlight source of the display screen based on the target backlight value for brightness adjustment, the clarity and readability of the content displayed on the display screen can be effectively improved.

[0130] In a feasible implementation manner, determining the correction coefficient based on the target adjustment coefficient and the candidate backlight value includes:

[0131] Based on the candidate backlight value and the value range of the backlight value of the display screen in the target correspondence, determine the initial backlight level corresponding to the candidate backlight value;

[0132] Determine a target backlight level corresponding to the candidate backlight value based on the magnitude relationship between the current illuminance and a predetermined illuminance, and the initial backlight level corresponding to the candidate backlight value;

[0133] Determine the correction coefficient based on the target adjustment coefficient and the target backlight level corresponding to the candidate backlight value, where the correction coefficient is negatively correlated with the target adjustment coefficient and the correction coefficient is positively correlated with the target backlight level.

[0134] Specifically, an interval of the backlight value of the display screen in the target correspondence relationship can be obtained. For example, the minimum backlight value and the maximum backlight value of the display screen in the target correspondence relationship can be used as the lower limit value and the upper limit value of the interval of the backlight value of the display screen in the target correspondence relationship, respectively.

[0135] In implementation, an initial backlight level corresponding to the candidate backlight value can be determined based on the candidate backlight value of the display screen under the current illuminance and the interval of the backlight value of the display screen in the target correspondence relationship. For example, the interval of the backlight value of the display screen in the target correspondence relationship can be divided into a predetermined number of sub-intervals, and each sub-interval corresponds to a backlight level. Thus, the candidate backlight value of the display screen under the current illuminance can be matched with each sub-interval, and the backlight level corresponding to the successfully matched sub-interval can be used as the initial backlight level corresponding to the candidate backlight value. It can be understood that the higher the backlight level, the larger the backlight value of the corresponding sub-interval.

[0136] Among them, a target backlight level corresponding to the candidate backlight value can be determined based on the magnitude relationship between the current illuminance and a predetermined illuminance, and the initial backlight level corresponding to the candidate backlight value. The predetermined illuminance can be the ambient illuminance corresponding to when the backlight value of the display screen reaches the backlight upper limit value in the initial correspondence relationship, that is, in the initial correspondence relationship, when the ambient illuminance is greater than or equal to the predetermined illuminance, the corresponding backlight value is the backlight upper limit value of the display screen.

[0137] For example, a target adjustment strategy can be determined based on a predetermined correspondence relationship between the magnitude relationship between the current illuminance and a predetermined illuminance and a backlight level adjustment strategy, and the initial backlight level corresponding to the candidate backlight value can be adjusted based on the target adjustment strategy to obtain the target backlight level corresponding to the candidate backlight value. The predetermined correspondence relationship between the magnitude relationship between the current illuminance and a predetermined illuminance and the backlight level adjustment strategy can be set according to actual needs, where the backlight level adjustment amount in the case where the current illuminance is greater than the predetermined illuminance can be greater than the backlight level adjustment amount in the case where the current illuminance is less than or equal to the predetermined illuminance.

[0138] During implementation, a correction factor can be determined based on the target adjustment factor and the target backlight level corresponding to the candidate backlight value. For example, the correction factor can be determined based on a predetermined correspondence relationship among the target adjustment factor, the target backlight level, and the correction factor. This predetermined correspondence relationship can be a function expression, a mapping table, a machine learning model, etc., and can be specifically set according to actual requirements, so as to quickly and accurately determine the correction factor.

[0139] Among them, the correction factor is negatively correlated with the target adjustment factor and positively correlated with the target backlight level. Thus, when the user adjusts the backlight value of the display screen in the direction of dimming, it can effectively compensate the candidate backlight value of the display screen under the current illuminance, and further effectively ensure the rationality of the obtained target backlight value.

[0140] Optionally, the predetermined correspondence relationship among the target adjustment factor, the target backlight level, and the correction factor can be as shown in Equation (1):

[0141] M = (1 - ΔL) * D t (1)

[0142] In the formula, M is the correction factor, ΔL is the target adjustment factor, and D t is the target backlight level.

[0143] In a feasible implementation manner, the determining of the target backlight level corresponding to the candidate backlight value based on the magnitude relationship between the current illuminance and the predetermined illuminance, and the initial backlight level corresponding to the candidate backlight value includes:

[0144] If the current illuminance is greater than the predetermined illuminance, a backlight level compensation value is determined based on the difference between the current illuminance and the predetermined illuminance, and the initial backlight level corresponding to the candidate backlight value is compensated based on the backlight level compensation value to obtain the target backlight level corresponding to the candidate backlight value;

[0145] If the current illuminance is less than or equal to the predetermined illuminance, the initial backlight level corresponding to the candidate backlight value is determined as the target backlight level corresponding to the candidate backlight value.

[0146] Specifically, when the current illuminance is greater than the predetermined illuminance, it indicates that as the ambient illuminance increases, the backlight value of the display screen determined according to the initial correspondence will no longer increase. Therefore, in the target correspondence obtained by adjusting the initial correspondence with the target adjustment coefficient, as the ambient illuminance increases, the backlight value of the display screen will no longer increase either. That is, when the user adjusts the backlight value of the display screen in the direction of darker brightness, the maximum backlight value of the display screen in the target correspondence will be less than the backlight upper limit value of the display screen, which is likely to cause the problem that the display screen is not sensitive to changes in ambient illuminance. Thus, in the case of a relatively large ambient illuminance, it is likely that the clarity and readability of the displayed content cannot be guaranteed due to the low brightness of the display screen.

[0147] At this time, the backlight level compensation value can be determined based on the difference between the current illuminance and the predetermined illuminance, and the initial backlight level corresponding to the candidate backlight value can be compensated based on the backlight level compensation value to obtain the target backlight level corresponding to the candidate backlight value. For example, the sum of the backlight level compensation value and the initial backlight level corresponding to the candidate backlight value can be determined as the target backlight level corresponding to the candidate backlight value. Thus, when the current illuminance is greater than the predetermined illuminance, compensating the candidate backlight value through the target backlight level can effectively avoid the situation where the clarity and readability of the displayed content cannot be guaranteed due to the low brightness of the display screen.

[0148] The backlight level compensation value can be positively correlated with the difference between the current illuminance and the predetermined illuminance, that is, the greater the difference between the current illuminance and the predetermined illuminance, the greater the backlight level compensation value, and the smaller the difference between the current illuminance and the predetermined illuminance, the smaller the backlight level compensation value.

[0149] Optionally, the method for determining the target backlight level corresponding to the candidate backlight value can be as shown in Equation (2):

[0150] D t =(L c -L p ) / 2000 + D i (2)

[0151] In the formula, D t is the target backlight level corresponding to the candidate backlight value, D i is the initial backlight level corresponding to the candidate backlight value, L c is the current illuminance, and L p is the predetermined illuminance.

[0152] When the current illuminance is less than or equal to the predetermined illuminance, it indicates that as the ambient illuminance increases, the backlight value of the display screen determined according to the initial correspondence will continuously increase. Thus, in the target correspondence obtained by adjusting the initial correspondence with the target adjustment coefficient, as the ambient illuminance increases, the backlight value of the display screen will also continuously increase. At this time, the initial backlight level corresponding to the candidate backlight value can be directly determined as the target backlight level corresponding to the candidate backlight value. Therefore, during the process of compensating the candidate backlight value according to the target backlight level, the rationality of the obtained target backlight value can be effectively guaranteed.

[0153] In a feasible implementation manner, the method for determining the target adjustment coefficient includes:

[0154] Based on the target illuminance and the initial correspondence, determine the initial backlight value of the display screen under the target illuminance;

[0155] Based on the difference between the manual backlight adjustment value and the initial backlight value, determine the target adjustment coefficient, and the target adjustment coefficient is positively correlated with the difference between the manual backlight adjustment value and the initial backlight value.

[0156] Specifically, a brightness adjustment module can be set on the display screen. The brightness adjustment module can be a brightness adjustment button, or a brightness adjustment component such as a brightness adjustment progress bar set on the display interface of the display screen, and can be specifically set according to actual requirements. Users can adjust the brightness of the display screen to a suitable brightness through the brightness adjustment module.

[0157] During implementation, in response to the user's manual backlight adjustment operation, determine the manual backlight adjustment value, record the ambient illuminance corresponding to the manual backlight adjustment value, and use the ambient illuminance corresponding to the manual backlight adjustment value as the target illuminance.

[0158] At the same time, based on the target illuminance and the initial correspondence between the ambient illuminance and the backlight value of the display screen, determine the initial backlight value of the display screen under the target illuminance.

[0159] Among them, the difference between the manual backlight adjustment value and the initial backlight value can be obtained, and the target adjustment coefficient is determined and stored based on this difference. The target adjustment coefficient is positively correlated with this difference, that is, the larger this difference is, the larger the target adjustment coefficient is, and the smaller this difference is, the smaller the target adjustment coefficient is. At the same time, based on the target adjustment coefficient, the initial correspondence between the ambient illuminance and the backlight value of the display screen can be adjusted to obtain the target correspondence. Thus, when the ambient illuminance changes, based on the target correspondence and the real-time ambient illuminance, the candidate backlight value of the display screen under the corresponding ambient illuminance can be determined, so as to effectively meet the brightness requirements of different users for the display screen.

[0160] Optionally, in the process of determining the target adjustment coefficient based on the difference between the manual backlight adjustment value and the initial backlight value, the ratio of the difference to the initial backlight value can be used as the target adjustment coefficient.

[0161] In a feasible implementation, the process of determining whether the backlight compensation condition is satisfied based on the target adjustment coefficient and the current illuminance includes:

[0162] If the target adjustment coefficient is less than 0 and the current illuminance is greater than the target illuminance, it is determined that the backlight compensation condition is satisfied;

[0163] If the target adjustment coefficient is greater than or equal to 0, and / or, the current illuminance is less than or equal to the target illuminance, it is determined that the backlight compensation condition is not satisfied.

[0164] Specifically, if the target adjustment coefficient is less than 0, it indicates that the manual backlight adjustment value is less than the initial backlight value, that is, the user adjusts the backlight value of the display screen in the direction of darker brightness. At this time, the magnitude relationship between the current illuminance and the target illuminance can be further obtained.

[0165] Among them, if the current illuminance is greater than the target illuminance, it indicates that the environment becomes brighter. At this time, if the backlight of the display screen is adjusted according to the backlight value corresponding to the current illuminance in the target correspondence relationship, there is a risk that the display screen is darker. Therefore, it can be determined that the backlight compensation condition is satisfied. Thus, by performing backlight compensation on the display screen, the rationality of the backlight value of the display screen can be effectively ensured, and further, the clarity and readability of the content displayed on the display screen can be effectively improved.

[0166] If the current illuminance is equal to the target illuminance, it indicates that the current illuminance is the same as the ambient illuminance during the user's manual backlight adjustment process. At this time, the backlight value corresponding to the current illuminance in the target correspondence relationship is the manual backlight adjustment value determined according to the user's manual backlight adjustment operation, which can meet the user's brightness requirement for the display screen and does not require backlight compensation, that is, the backlight compensation condition is not satisfied.

[0167] If the current illuminance is less than the target illuminance, it indicates that the environment becomes darker. At this time, whether the user adjusts the backlight value of the display screen in the direction of darker brightness or in the direction of brighter brightness during the manual backlight adjustment process, it will not cause the display screen to be too dark to affect the clarity and readability of the displayed content, and no backlight compensation is required, that is, the backlight compensation condition is not satisfied.

[0168] In addition, if the target adjustment coefficient is equal to 0, it indicates that the manual backlight adjustment value is equal to the initial backlight value, that is, the user has not effectively adjusted the backlight value of the display screen. At this time, the target backlight value of the display screen can be determined according to the initial correspondence between the ambient light intensity and the backlight value of the display screen. Since this initial correspondence is pre-configured, no backlight compensation is required, that is, the backlight compensation condition is not met.

[0169] If the target adjustment coefficient is greater than 0, it indicates that the manual backlight adjustment value is greater than the initial backlight value, that is, the user adjusts the backlight value of the display screen in the direction of increasing brightness. Therefore, when the ambient light intensity changes, the backlight of the display screen is adjusted according to the backlight value corresponding to the current light intensity in the target correspondence, which will not cause the display screen to be too dark, and thus no backlight compensation is required, that is, the backlight compensation condition is not met.

[0170] Therefore, through the method of the embodiment of the present application, it is possible to maximize the satisfaction of the user's brightness requirement for the display screen while ensuring the clarity and readability of the content displayed on the display screen.

[0171] In a feasible implementation manner, the method for determining the target correspondence includes:

[0172] Adjust the backlight values corresponding to the respective ambient light intensities in the initial correspondence based on the target adjustment coefficient to obtain the initial backlight adjustment values corresponding to the respective ambient light intensities;

[0173] Based on the backlight value limit in the initial correspondence, perform a correction process on the initial backlight adjustment values corresponding to the respective ambient light intensities to obtain the target backlight adjustment values corresponding to the respective ambient light intensities;

[0174] Generate the target correspondence based on the target backlight adjustment values corresponding to the respective ambient light intensities.

[0175] Specifically, after determining the target adjustment coefficient, for any ambient light intensity in the initial correspondence, the backlight value corresponding to the ambient light intensity in the initial correspondence can be adjusted based on the target adjustment coefficient to obtain the initial backlight adjustment value corresponding to the ambient light intensity.

[0176] Optionally, the method for adjusting the backlight value corresponding to the ambient light intensity in the initial correspondence based on the target adjustment coefficient to obtain the initial backlight adjustment value corresponding to the ambient light intensity can be as shown in Equation (3):

[0177] BV 2 =BV 1 *(1 + ΔL) (3)

[0178] In the formula, BV 2is the initial backlight adjustment value corresponding to the ambient light intensity, BV 1 is the backlight value corresponding to the ambient light intensity in the initial correspondence, and ΔL is the target adjustment coefficient.

[0179] The backlight value limits in the initial correspondence may include the backlight upper limit value of the display screen and the backlight lower limit value of the display screen.

[0180] In implementation, for any ambient light intensity in the initial correspondence, based on the backlight value limits in the initial correspondence, the initial backlight adjustment value corresponding to the ambient light intensity can be corrected. For example, the initial backlight adjustment value corresponding to the ambient light intensity can be compared with the backlight value limits. If the initial backlight adjustment value corresponding to the ambient light intensity is greater than the backlight upper limit value of the display screen, the backlight upper limit value of the display screen is determined as the target backlight adjustment value corresponding to the ambient light intensity. If the initial backlight adjustment value corresponding to the ambient light intensity is less than the backlight lower limit value of the display screen, the backlight lower limit value of the display screen is determined as the target backlight adjustment value corresponding to the ambient light intensity. If the initial backlight adjustment value corresponding to the ambient light intensity is less than or equal to the backlight upper limit value of the display screen and greater than or equal to the backlight lower limit value of the display screen, the initial backlight adjustment value corresponding to the ambient light intensity is determined as the target backlight adjustment value corresponding to the ambient light intensity, so as to ensure the effectiveness of the target backlight adjustment values corresponding to each ambient light intensity.

[0181] Thus, based on the target backlight adjustment values corresponding to each ambient light intensity, a target correspondence can be generated. For example, the target backlight adjustment values corresponding to each ambient light intensity can be fitted to obtain the target correspondence, so that the backlight of the display screen can be effectively adjusted according to the target correspondence.

[0182] Exemplary device

[0183] In an exemplary embodiment of the present specification, a backlight adjustment device is further provided, which is applied to a display screen, as Figure 3 shown, the device includes:

[0184] The first processing module 301 is configured to obtain the current light intensity of the environment where the display screen is located;

[0185] The second processing module 302 is configured to determine whether the backlight compensation condition is satisfied based on the target adjustment coefficient and the current light intensity, and the target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen;

[0186] The third processing module 303 is configured to, if satisfied, compensate the candidate backlight value at the current light intensity to obtain the target backlight value, and control the backlight source of the display screen to adjust the brightness based on the target backlight value, and the candidate backlight value is determined based on the manual backlight adjustment value;

[0187] If not satisfied, control the backlight of the display screen based on the candidate backlight value to perform brightness adjustment.

[0188] In a feasible implementation manner, the second processing module 302 is further configured to:

[0189] Based on the target illuminance and the initial correspondence between the ambient illuminance and the backlight value of the display screen, determine the initial backlight value of the display screen under the target illuminance; the target illuminance is the ambient illuminance corresponding to the manual backlight adjustment value;

[0190] Based on the difference between the manual backlight adjustment value and the initial backlight value, determine the target adjustment coefficient, and the target adjustment coefficient is positively correlated with the difference between the manual backlight adjustment value and the initial backlight value.

[0191] In a feasible implementation manner, the second processing module 302 is specifically configured to:

[0192] If the target adjustment coefficient is less than 0 and the current illuminance is greater than the target illuminance, it is determined that the backlight compensation condition is satisfied;

[0193] If the target adjustment coefficient is greater than or equal to 0, and / or, the current illuminance is less than or equal to the target illuminance, it is determined that the backlight compensation condition is not satisfied.

[0194] In an exemplary embodiment of this specification, another backlight adjustment device is further provided, which is applied to a display screen, as Figure 4 shown, the device includes:

[0195] A fourth processing module 401, configured to obtain the current illuminance of the environment where the display screen is located;

[0196] A fifth processing module 402, configured to, if it is determined that the backlight compensation condition is satisfied based on the target adjustment coefficient and the current illuminance, compensate the candidate backlight value based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance, the target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen, the target illuminance is the ambient illuminance corresponding to the manual backlight adjustment value, the candidate backlight value is determined based on the current illuminance and the target correspondence, and the target correspondence is obtained by adjusting the initial correspondence between the ambient illuminance and the backlight value of the display screen based on the target adjustment coefficient;

[0197] A sixth processing module 403, configured to control the backlight of the display screen to perform brightness adjustment based on the target backlight value.

[0198] In a feasible implementation manner, the fifth processing module 402 is specifically configured to:

[0199] Determine a correction coefficient based on the target adjustment coefficient and the candidate backlight value;

[0200] Perform correction processing on the difference between the current illuminance and the target illuminance based on the correction coefficient to obtain a backlight compensation value;

[0201] Compensate the candidate backlight value based on the backlight compensation value to obtain the target backlight value of the display screen under the current illuminance.

[0202] In a feasible implementation manner, the fifth processing module 402 is specifically configured to:

[0203] Determine an initial backlight level corresponding to the candidate backlight value based on the candidate backlight value and the value range of the backlight value of the display screen in the target correspondence;

[0204] Determine the target backlight level corresponding to the candidate backlight value based on the magnitude relationship between the current illuminance and a predetermined illuminance and the initial backlight level corresponding to the candidate backlight value;

[0205] Determine the correction coefficient based on the target adjustment coefficient and the target backlight level corresponding to the candidate backlight value, where the correction coefficient is negatively correlated with the target adjustment coefficient and the correction coefficient is positively correlated with the target backlight level.

[0206] In a feasible implementation manner, the fifth processing module 402 is specifically configured to:

[0207] If the current illuminance is greater than the predetermined illuminance, determine a backlight level compensation value based on the difference between the current illuminance and the predetermined illuminance, and compensate the initial backlight level corresponding to the candidate backlight value based on the backlight level compensation value to obtain the target backlight level corresponding to the candidate backlight value;

[0208] If the current illuminance is less than or equal to the predetermined illuminance, determine the initial backlight level corresponding to the candidate backlight value as the target backlight level corresponding to the candidate backlight value.

[0209] In a feasible implementation manner, the fifth processing module 402 is further configured to:

[0210] Determine an initial backlight value of the display screen under the target illuminance based on the target illuminance and the initial correspondence;

[0211] Determine the target adjustment coefficient based on the difference between the manual backlight adjustment value and the initial backlight value, where the target adjustment coefficient is positively correlated with the difference between the manual backlight adjustment value and the initial backlight value.

[0212] In a feasible implementation, the fifth processing module 402 is specifically configured to:

[0213] If the target adjustment coefficient is less than 0 and the current illuminance is greater than the target illuminance, it is determined that the backlight compensation condition is satisfied;

[0214] If the target adjustment coefficient is greater than or equal to 0, and / or, the current illuminance is less than or equal to the target illuminance, it is determined that the backlight compensation condition is not satisfied.

[0215] In a feasible implementation, the fifth processing module 402 is further configured to:

[0216] Adjust the backlight values corresponding to the respective ambient illuminances in the initial correspondence based on the target adjustment coefficient to obtain the initial backlight adjustment values corresponding to the respective ambient illuminances;

[0217] Based on the backlight value limits in the initial correspondence, perform a correction process on the initial backlight adjustment values corresponding to the respective ambient illuminances to obtain the target backlight adjustment values corresponding to the respective ambient illuminances;

[0218] Generate the target correspondence based on the target backlight adjustment values corresponding to the respective ambient illuminances.

[0219] The backlight adjustment device provided in this embodiment belongs to the same inventive concept as the backlight adjustment method provided in the above embodiments of the present application, and can execute the backlight adjustment method provided in any of the above embodiments of the present application, and has the corresponding functional modules and beneficial effects for executing the backlight adjustment method. For technical details not described in detail in this embodiment, reference may be made to the specific processing content of the backlight adjustment method provided in the above embodiments of the present application, which will not be elaborated here.

[0220] Exemplary Device

[0221] In an exemplary embodiment of this specification, a backlight adjustment system is further provided, which is applied to a display screen, as Figure 5 shown, the backlight adjustment system includes a light intensity acquisition module 501 and a controller 502, and the light intensity acquisition module 501 is used to detect the current illuminance of the environment where the display screen is located;

[0222] The controller 502 includes at least one processor and at least one memory. A computer program is stored in the memory, and when the computer program is executed by the processor, it implements the backlight adjustment method described in any of the above embodiments.

[0223] In an exemplary embodiment of this specification, a display screen is further provided. The display screen includes a backlight source and the backlight adjustment system described in the above embodiment.

[0224] Exemplary Computer Program Product and Storage Medium

[0225] In addition to the above methods and devices, the backlight adjustment method provided in the embodiments of this specification may also be a computer program product, which includes computer program instructions. When the computer program instructions are run by a processor, the processor is caused to execute the steps of the backlight adjustment method according to various embodiments of this specification described in the "exemplary method" section above of this specification.

[0226] The computer program product can be written in any combination of one or more programming languages for programming code to perform the operations of the embodiments of this specification. The programming languages include object-oriented programming languages such as Java, C++, etc., and also include conventional procedural programming languages such as the "C" language or similar programming languages.

[0227] In addition, the embodiments of this specification further provide a computer-readable storage medium, on which a computer program is stored. The computer program is executed by a processor to perform the steps of the backlight adjustment method according to various embodiments of this specification described in the "exemplary method" section above of this specification.

[0228] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the embodiments provided in this specification can include non-volatile and / or volatile memories. Non-volatile memories can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memories can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0229] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0230] The above-described embodiments merely represent several implementation manners of this specification. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the solutions provided by the embodiments of this specification. It should be noted that for those of ordinary skill in the art, without departing from the concept of this specification, several modifications and improvements can still be made, and these all belong to the protection scope of this specification. Therefore, the protection scope of the patent of this specification should be subject to the appended claims.

Claims

1. A backlight adjustment method, characterized in that: Applied to a display screen, the method comprises: Obtaining the current illuminance of the environment in which the display screen is located; Determining whether a backlight compensation condition is met based on a target adjustment coefficient and the current illuminance, wherein the target adjustment coefficient is determined based on a manual backlight adjustment value of the display screen; If satisfied, the candidate backlight value under the current illumination is compensated to obtain a target backlight value, and the backlight source of the display screen is controlled to adjust the brightness based on the target backlight value, wherein the candidate backlight value is determined based on the manual backlight adjustment value; If not satisfied, the backlight source of the display screen is controlled to adjust the brightness based on the candidate backlight value.

2. The method according to claim 1, characterized in that The method for determining the target adjustment coefficient includes: Based on the target illuminance and the initial corresponding relationship between the ambient illuminance and the backlight value of the display screen, determining the initial backlight value of the display screen at the target illuminance; the target illuminance is the ambient illuminance corresponding to the manual backlight adjustment value; The target adjustment coefficient is determined based on the difference between the manual backlight adjustment value and the initial backlight value, and the target adjustment coefficient is positively correlated with the difference between the manual backlight adjustment value and the initial backlight value.

3. The method according to claim 2, characterized in that The determining whether a backlight compensation condition is met based on the target adjustment coefficient and the current illuminance includes: If the target adjustment coefficient is less than 0, and the current illuminance is greater than the target illuminance, it is determined that the backlight compensation condition is met; If the target adjustment coefficient is greater than or equal to 0, and / or the current illuminance is less than or equal to the target illuminance, it is determined that the backlight compensation condition is not met.

4. A backlight adjustment method, characterized in that: Applied to a display screen, the method comprises: Obtaining the current illuminance of the environment in which the display screen is located; If it is determined based on the target adjustment coefficient and the current illuminance that the backlight compensation condition is met, the candidate backlight value is compensated based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance, the target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen, the target illuminance is the ambient light illuminance corresponding to the manual backlight adjustment value, the candidate backlight value is determined based on the current illuminance and a target corresponding relationship, and the target corresponding relationship is obtained by adjusting the initial corresponding relationship between the ambient light illuminance and the backlight value of the display screen based on the target adjustment coefficient; Based on the target backlight value, the backlight source of the display screen is controlled to adjust the brightness.

5. The method according to claim 4, characterized in that The compensating the candidate backlight value based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance includes: Determining a correction coefficient based on the target adjustment coefficient and the candidate backlight value; Correcting the difference between the current illuminance and the target illuminance based on the correction coefficient to obtain a backlight compensation value; The candidate backlight value is compensated based on the backlight compensation value to obtain a target backlight value of the display screen under the current illumination.

6. The method according to claim 5, characterized in that The determining of the correction coefficient based on the target adjustment coefficient and the candidate backlight value includes: Determining an initial backlight level corresponding to the candidate backlight value based on the candidate backlight value and a value interval of the backlight value of the display screen in the target corresponding relationship; Determining a target backlight level corresponding to the candidate backlight value based on a magnitude relationship between the current illuminance and the predetermined illuminance and an initial backlight level corresponding to the candidate backlight value; The correction coefficient is determined based on the target adjustment coefficient and the target backlight level corresponding to the candidate backlight value, wherein the correction coefficient is negatively correlated with the target adjustment coefficient and positively correlated with the target backlight level.

7. The method according to claim 6, characterized in that The determining, based on the magnitude relationship between the current illuminance and the predetermined illuminance and the initial backlight level corresponding to the candidate backlight value, a target backlight level corresponding to the candidate backlight value comprises: If the current light illumination is greater than the predetermined light illumination, a backlight level compensation value is determined based on the difference between the current light illumination and the predetermined light illumination, and an initial backlight level corresponding to the candidate backlight value is compensated based on the backlight level compensation value to obtain a target backlight level corresponding to the candidate backlight value; If the current illuminance is less than or equal to the predetermined illuminance, the initial backlight level corresponding to the candidate backlight value is determined as the target backlight level corresponding to the candidate backlight value.

8. The method according to any one of claims 4 to 7, characterized in that: The method for determining the target correspondence relationship includes: Adjusting the backlight value corresponding to each of the ambient light illuminations in the initial corresponding relationship based on the target adjustment coefficient to obtain an initial backlight adjustment value corresponding to each of the ambient light illuminations; Based on the backlight value limit in the initial corresponding relationship, the initial backlight adjustment value corresponding to each of the ambient light illuminations is corrected to obtain the target backlight adjustment value corresponding to each of the ambient light illuminations; The target correspondence relationship is generated based on the target backlight adjustment value corresponding to each of the ambient light illuminations.

9. A backlight adjustment device, characterized in that: Applied to a display screen, the device comprises: A first processing module, used for obtaining the current light intensity of the environment where the display screen is located; A second processing module, configured to determine whether a backlight compensation condition is met based on a target adjustment coefficient and the current illuminance, wherein the target adjustment coefficient is determined based on a manual backlight adjustment value of the display screen; A third processing module is configured to compensate the candidate backlight value under the current illumination to obtain a target backlight value, and control the backlight source of the display screen to adjust the brightness based on the target backlight value, if the condition is satisfied, wherein the candidate backlight value is determined based on the manual backlight adjustment value; If not satisfied, the backlight source of the display screen is controlled to adjust the brightness based on the candidate backlight value.

10. A backlight adjustment device, characterized in that: Applied to a display screen, the device comprises: A fourth processing module, used to obtain the current light intensity of the environment in which the display screen is located; a fifth processing module, for compensating the candidate backlight value based on the difference between the current illuminance and the target illuminance to obtain the target backlight value of the display screen under the current illuminance if it is determined that the backlight compensation condition is met based on the target adjustment coefficient and the current illuminance, wherein the target adjustment coefficient is determined based on the manual backlight adjustment value of the display screen, the target illuminance is the ambient light illuminance corresponding to the manual backlight adjustment value, the candidate backlight value is determined based on the current illuminance and a target corresponding relationship, and the target corresponding relationship is obtained by adjusting the initial corresponding relationship between the ambient light illuminance and the backlight value of the display screen based on the target adjustment coefficient; The sixth processing module is used to control the backlight source of the display screen to adjust the brightness based on the target backlight value.

11. A backlight adjustment system, characterized in that: Applied to a display screen, the backlight adjustment system includes a light acquisition module and a controller, and the light acquisition module is used to detect the current light intensity of the environment in which the display screen is located; The controller includes at least one processor and at least one memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the backlight adjustment method according to any one of claims 1 to 8 is implemented.

12. A display screen, characterized in that: The display screen includes a backlight source and a backlight adjustment system as claimed in claim 11.

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