Display device, display brightness adjustment method, storage medium, and program product

Abstract

The embodiment of the invention belongs to the display technology, and provides a display device, a display brightness adjusting method, a storage medium and a program product. The method comprises the following steps: controlling the backlight brightness of a display screen by adopting a first mapping relation between an average pixel level APL value of the display screen and the backlight brightness; according to the APL value of the display screen and a preset APL value, determining whether to use a second mapping relation between the APL value of the display screen and the backlight brightness; if yes, adopting a second mapping relation to control the backlight brightness of the display screen, the backlight brightness of the display screen corresponding to the APL value smaller than the preset APL value in the second mapping relation and the first mapping relation is different. The service life of the backlight assembly can be prolonged.

Description

Technical Field

[0001] Embodiments of the present application relate to display technology. More specifically, it relates to a display device, a display brightness adjustment method, a storage medium, and a program product. Background Art

[0002] Mini-LED display screens are widely used in display devices such as smart TVs. With the development of display screen technology, the brightness that current mini-LED display screens can achieve is getting higher and higher. However, the greater the brightness of the mini-LED display screen, the higher the temperature of the backlight components such as the panel and diffusion plate of the display device, thereby reducing the service life of the above-mentioned backlight components. Summary of the Invention

[0003] Exemplary embodiments of the present application provide a display device, a display brightness adjustment method, a storage medium, and a program product, which can improve the service life of the backlight components.

[0004] In a first aspect, the present application provides a display device, which includes:

[0005] A display screen for image display;

[0006] A processor connected to the display screen, configured to:

[0007] Perform backlight brightness control of the display screen using a first mapping relationship between the average pixel level APL value of the display screen and the backlight brightness;

[0008] Determine whether to use a second mapping relationship between the APL value of the display screen and the backlight brightness according to the APL value of the display screen and a preset APL value;

[0009] If so, perform backlight brightness control of the display screen using the second mapping relationship; the second mapping relationship is different from the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship.

[0010] In some embodiments, if the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship is higher than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship, then performing the backlight brightness control of the display screen using the first mapping relationship between the average pixel level APL value of the display screen and the backlight brightness includes:

[0011] In response to a power-on instruction, perform backlight brightness control of the display screen using the first mapping relationship;

[0012] Alternatively, when the APL value changes from less than the preset APL value to greater than or equal to the preset APL value, and the backlight brightness control of the display screen is performed using the second mapping relationship for a first preset duration, the backlight brightness control of the display screen is performed using the first mapping relationship.

[0013] In some embodiments, determining whether to use the second mapping relationship between the APL value of the display screen and the backlight brightness according to the APL value of the display screen and the preset APL value includes:

[0014] When the APL value changes from greater than or equal to the preset APL value to less than the preset APL value, and is less than the preset APL value for a second preset duration, it is determined to use the second mapping relationship.

[0015] In some embodiments, if the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship is lower than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship, then performing the backlight brightness control of the display screen using the first mapping relationship between the average pixel level (APL) value of the display screen and the backlight brightness includes:

[0016] When the APL value changes from greater than or equal to the preset APL value to less than the preset APL value, and is less than the preset APL value for a second preset duration, the backlight brightness control of the display screen is performed using the first mapping relationship.

[0017] In some embodiments, determining whether to use the second mapping relationship between the APL value of the display screen and the backlight brightness according to the APL value of the display screen and the preset APL value includes:

[0018] When the APL value changes from less than the preset APL value to greater than or equal to the preset APL value, and the backlight brightness control of the display screen is performed using the first mapping relationship for a first preset duration, it is determined to use the second mapping relationship.

[0019] In some embodiments, if the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship is higher than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship, then performing the backlight brightness control of the display screen using the second mapping relationship includes:

[0020] Determining a first backlight brightness corresponding to the APL value of the display screen using the first mapping relationship, and determining a second backlight brightness corresponding to the APL value of the display screen using the second mapping relationship;

[0021] Perform smoothing filtering on the first backlight brightness and the second backlight brightness to obtain at least one brightness value between the first backlight brightness and the second backlight brightness;

[0022] Perform backlight brightness control of the display screen according to the at least one brightness value.

[0023] In some embodiments, the backlight brightness of the display screen corresponding to the APL value greater than or equal to the preset APL value in the second mapping relationship is the same as that in the first mapping relationship.

[0024] In a second aspect, the present application provides a display brightness adjustment method, and the method includes:

[0025] Perform backlight brightness control of the display screen by using a first mapping relationship between the average pixel level (APL) value of the display screen and the backlight brightness;

[0026] Determine whether to use a second mapping relationship between the APL value of the display screen and the backlight brightness according to the APL value of the display screen and the preset APL value;

[0027] If so, perform backlight brightness control of the display screen by using the second mapping relationship; the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship is different from that in the first mapping relationship.

[0028] In a third aspect, the present application provides a computer-readable storage medium, on which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the method described in the second aspect is implemented.

[0029] In a fourth aspect, the present application provides a computer program product, including a computer program, and when the computer program is executed by a processor, the method described in the second aspect is implemented.

[0030] For the display device, display brightness adjustment method, storage medium and program product provided by the present application, the processor of the display device can use the first mapping relationship between the APL value of the display screen and the backlight brightness to control the backlight brightness of the display screen, and based on the APL value of the display screen and the preset APL value, determine whether to use the second mapping relationship between the APL of the display screen and the backlight brightness to control the backlight brightness of the display screen. Through the above method, the processor can switch the mapping relationship used for backlight brightness control based on the APL value of the display screen, realize the adjustment of the backlight brightness of the display screen, reduce the possibility of overheating of the backlight component of the display device, and improve the service life of the backlight component in the display device. Description of the Drawings

[0031] To more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the related art. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic structural diagram of a backlight system of a display device;

[0033] Figure 2 It is a schematic flowchart of a display brightness adjustment method provided by the present application;

[0034] Figure 3 It is a schematic curve diagram of a first mapping relationship and a second mapping relationship provided by the present application;

[0035] Figure 4 It is a schematic structural diagram of a display brightness adjustment device provided by the present application. Detailed implementation manners

[0036] To make the objectives, implementation manners, and advantages of the present application clearer, the following will clearly and completely describe the exemplary implementation manners of the present application with reference to the accompanying drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0037] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the subsequent described implementation manners, rather than intending to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood in their ordinary and general meanings.

[0038] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not be exclusive of inclusion. For example, a product or device including a series of components does not necessarily have to be limited to those clearly listed components, but may include other components not clearly listed or inherent to these products or devices.

[0039] The display device provided by the implementation manners of the present application can have various implementation forms. For example, it can be a smart TV, a laser projection device, a monitor, an electronic bulletin board, an electronic table, etc.

[0040] Exemplarily, Figure 1 It is a schematic structural diagram of a backlight system of a display device. For example, Figure 1Taking the backlight system shown as an example, during the hybrid dimming process, the picture quality processing chip can obtain the video stream to be displayed and process the video stream. The picture quality processing chip can divide the processed video stream into image data and backlight data, which are respectively used to light up the screen (for example, the picture quality processing chip can transmit the image data to the TCON so that the TCON can light up the screen according to the image data) and the backlight panel.

[0041] For the backlight part, the picture quality processing chip can determine the average pixel level (APL) value of each partition of the backlight panel according to the backlight data, and the average value of the APL values of each partition of the backlight panel (which can be simply referred to as the average APL value). Then, the picture quality processing chip can send the APL value of each partition of the backlight panel and the average APL value to the microcontroller unit (MCU). The MCU can determine the current value and PWM signal of each partition according to the average APL value, the APL value of each partition, and the pre-stored peak brightness curve, and send the current value and PWM signal of each partition to the backlight controller (BCON). The BCON can send the current value and PWM signal of each partition to the driving chip on the lamp board (that is, the backlight panel), so that the driving chip can light up the lamp board according to the current value and PWM signal of each partition, realizing hybrid dimming based on current and PWM signal.

[0042] With the development of mini light emitting diode (mini-LED) liquid crystal displays (in some embodiments, mini-LEDs can also be called micro LEDs), in order to provide users with a better visual effect experience, the brightness of current mini-LED liquid crystal displays is getting higher and higher. However, the greater the brightness of the mini-LED display, the higher the temperature of the panel, diffusion plate and other backlight components in the backlight assembly of the display, which may in turn reduce the service life of the above backlight components.

[0043] Considering the above problems existing in the existing display devices, therefore, the present application proposes a method for adjusting the brightness of a display device to avoid overheating of the backlight components of the display device and improve the service life of the backlight components in the display device. The execution subject of this method can be the display device or the processor of the display device (such as the above MCU).

[0044] Taking the processor of the display device as the execution subject of the display brightness adjustment method provided in this application as an example, the technical solution of this application will be described in detail in combination with specific embodiments. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0045] Figure 2 It is a schematic flowchart of a display brightness adjustment method provided in this application. As Figure 2 shown, the method may include the following steps:

[0046] S101. Use the first mapping relationship between the average pixel level (APL) value of the display screen and the backlight brightness to control the backlight brightness of the display screen.

[0047] Taking the example that the display screen includes multiple display partitions, the APL value of the above display screen may be the average value of the APL values of all display areas included in the display screen. Exemplarily, the above first mapping relationship may be determined by the user through offline experiments and pre-stored in the processor. Exemplarily, the user may, for example, through offline experiments, determine the mapping relationship between the white window percentage of the display screen and the backlight brightness. Among them, each white window percentage may correspond to an APL value.

[0048] It should be understood that this application does not limit how the display device determines the APL value of the display screen and how to use the above first mapping relationship to control the backlight brightness of the display screen. Optionally, after obtaining a frame of image, the display device may determine the APL value of the display screen corresponding to the frame of image by any existing method for determining the APL value of the display screen. Then, the processor of the display device may, for example, determine the backlight brightness through the APL value and control the backlight panel of the display screen to be lit according to the backlight brightness.

[0049] S102. Determine whether to use the second mapping relationship between the APL value of the display screen and the backlight brightness according to the APL value of the display screen and the preset APL value.

[0050] In some embodiments, the above preset APL value may be determined based on the operating temperature of at least one backlight component of the display device. Through the above method, the condition for the processor of the display device to switch the mapping relationship is related to the operating temperature of the backlight component. That is to say, it realizes determining whether to switch the above first mapping relationship and the second mapping relationship based on the operating temperature of the backlight component, thereby avoiding the influence of excessive backlight brightness on the operating temperature of the backlight component and improving the accuracy of the adjustment of the backlight brightness. Exemplarily, the user may determine the APL critical value of the display screen that will cause the operating temperature of the backlight component to be too high through offline experiments as the preset APL value.

[0051] Among them, the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship is different from that in the first mapping relationship. For example, the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship can be lower than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship. Or, the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship can also be higher than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship.

[0052] Taking the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship being higher than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship as an example, Figure 3 This is a schematic diagram of the curves of a first mapping relationship and a second mapping relationship provided by this application. Among them, as Figure 3 shown in the horizontal axis can be used to represent the white window percentage of the display screen corresponding to the APL value of the display screen. As Figure 3 shown in the vertical axis can be used to represent the backlight brightness. In some embodiments, as Figure 3 shown, the backlight brightness of the display screen corresponding to the APL value greater than or equal to the preset APL value in the second mapping relationship can be the same as that in the first mapping relationship.

[0053] S103. If it is determined to use the second mapping relationship between the APL value of the display screen and the backlight brightness, then the second mapping relationship is adopted to control the backlight brightness of the display screen.

[0054] It should be understood that this application does not limit how the processor of the display device uses the above second mapping relationship to control the backlight brightness of the display screen.

[0055] Optionally, after the processor uses the second mapping relationship to control the backlight brightness of the display screen, it can continue to determine whether to switch to using the first mapping relationship between the APL value of the display screen and the backlight brightness to control the backlight brightness of the display screen according to the APL value of the display screen and the preset APL value.

[0056] If the processor of the display device determines not to use the second mapping relationship between the APL value of the display screen and the backlight brightness according to the APL value of the display screen and the preset APL value, optionally, the processor can continue to use the above first mapping relationship to control the backlight brightness of the display screen, for example.

[0057] In some embodiments, the backlight brightness of the display screen corresponding to the APL values greater than or equal to the preset APL value in the second mapping relationship is the same as that in the first mapping relationship. Through the above method, the reuse of the first mapping relationship and the second mapping relationship can be improved, the number of changes in the backlight brightness during the high and low brightness switching can be reduced, and thus the user experience can be improved.

[0058] Alternatively, the backlight brightness of the display screen corresponding to the APL values greater than or equal to the preset APL value in the second mapping relationship may also be different.

[0059] In this embodiment, the processor of the display device may adopt the first mapping relationship between the APL value of the display screen and the backlight brightness to control the backlight brightness of the display screen, and based on the APL value of the display screen and the preset APL value, determine whether to use the second mapping relationship between the APL and the backlight brightness of the display screen to control the backlight brightness of the display screen. Through the above method, the processor can switch the mapping relationship used for backlight brightness control based on the APL value of the display screen, realizing the adjustment of the backlight brightness of the display screen, reducing the possibility of overheating of the backlight component of the display device, and improving the service life of the backlight component in the display device.

[0060] The following details how the processor uses the first mapping relationship between the average pixel level (APL) value of the display screen and the backlight brightness to control the backlight brightness of the display screen:

[0061] Taking the case where the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship is higher than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship as an example, as a possible implementation, the processor may respond to the power-on instruction and use this first mapping relationship to control the backlight brightness of the display screen. Because "the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship is higher than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship", the display device can directly use the first mapping relationship to control the backlight brightness after power-on, that is, the display device initially displays images at a higher brightness, improving the display effect and thus the user experience.

[0062] Optionally, the processor may first receive the above power-on instruction and then respond to the power-on instruction. It should be understood that this application does not limit how the processor receives the above power-on instruction.

[0063] As another possible implementation, when the above APL value changes from less than the preset APL value to greater than or equal to the preset APL value, and the backlight brightness control of the display screen is carried out using the above second mapping relationship for the first preset duration, the processor may use the above first mapping relationship to control the backlight brightness of the display screen.

[0064] That is to say, after the display device switches to using the second mapping relationship to control the backlight brightness of the display screen, it can continue to judge the size relationship between the APL value and the preset APL value. When the APL value changes from less than the preset APL value to greater than or equal to the preset APL value, it indicates that the backlight brightness corresponding to this APL value will not cause the working temperature of the backlight component to be too high; when the backlight brightness control of the display screen is carried out using the above second mapping relationship for the first preset duration, it indicates that after the first preset, the temperature of the backlight component has dropped to a suitable temperature and will not cause the backlight component to overheat. Therefore, through the above method, when the backlight component has cooled down and the backlight brightness will not cause the temperature of the backlight component to overheat, the first mapping relationship is switched to control the backlight brightness of the display screen, so that the display device can avoid overheating of the backlight component while displaying a higher backlight brightness, and improve the service life of the backlight component.

[0065] Optionally, the above first preset duration can be determined by the user through offline experiments and stored in the processor of the display device in advance.

[0066] In this implementation manner, in some embodiments, the processor of the display device may determine to use the above second mapping relationship when the APL value of the above display screen changes from greater than or equal to the preset APL value to less than the preset APL value and remains less than the preset APL value for the second preset duration. If the APL value changes from greater than or equal to the preset APL value to less than the preset APL value and remains less than the preset APL value for the second preset duration, it indicates that the display device has been operating at a relatively high display brightness for the second preset duration, which may cause the working temperature of the backlight component of the display device to be relatively high. Therefore, by switching to the second mapping relationship, since the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship is less than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship, the backlight brightness of the display device can be reduced, so that the display device performs backlight display at a lower brightness, avoiding the possibility of overheating of the backlight component caused by too high brightness.

[0067] Optionally, the above second preset duration can be determined by the user through offline experiments and stored in the processor of the display device in advance.

[0068] Taking the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the above first mapping relationship being lower than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship as an example, as a possible implementation manner, the processor may, when the APL value changes from being greater than or equal to the preset APL value to being less than the preset APL value and the state of being less than the preset APL value lasts for a second preset duration, use the first mapping relationship to control the backlight brightness of the display screen.

[0069] Through the above method, since the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship is lower than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship, when switching to using the first mapping relationship to control the backlight brightness of the display screen, the backlight brightness of the display screen can be reduced, thus achieving the reduction of the temperature of the backlight component.

[0070] In this implementation manner, in some embodiments, the processor may determine to use the second mapping relationship when the APL value changes from being less than the preset APL value to being greater than or equal to the preset APL value and the control of the backlight brightness of the display screen using the above first mapping relationship lasts for a first preset duration.

[0071] Through the above method, when the backlight component has cooled down and the backlight brightness will not cause the temperature of the backlight component to overheat, the second mapping relationship is switched to control the backlight brightness of the display screen, enabling the display device to display at a relatively high backlight brightness while avoiding overheating of the backlight component and improving the service life of the backlight component.

[0072] As a possible implementation manner, the display device may also perform smoothing filtering during the brightness change process to improve the smoothness of the brightness change process, avoid sudden brightness changes, and thus improve the user experience. For example, taking the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship being higher than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship as an example, as a possible implementation manner, after determining to use the second mapping relationship between the APL value and the backlight brightness of the display screen according to the APL value of the display screen and the preset APL value, the display device may use the first mapping relationship to determine the first backlight brightness corresponding to the APL value of the display screen, and use the second mapping relationship to determine the second backlight brightness corresponding to the APL value of the display screen.

[0073] Then, the processor of the display device may perform smooth filtering on the first backlight brightness and the second backlight brightness to obtain at least one brightness value between the first backlight brightness and the second backlight brightness. Optionally, the processor of the display device may perform smooth filtering on the first backlight brightness and the second backlight brightness by filtering methods such as mean filtering to obtain at least one brightness value between the first backlight brightness and the second backlight brightness.

[0074] After the above-mentioned smoothing filtering, the processor of the display device can control the backlight brightness of the display screen according to the at least one brightness value. Optionally, the processor of the display device can control the backlight brightness of the display screen according to the time sequence of each brightness value for any brightness value of the at least one brightness value, so as to achieve smooth changes in the backlight brightness.

[0075] In this embodiment, by smoothing and filtering the first backlight brightness and the second backlight brightness, the display device can smoothly reduce the brightness when reducing the first backlight brightness to the second backlight brightness, thereby improving the user experience.

[0076] Still as Figure 3 Taking the first mapping relationship and the second mapping relationship shown in as an example, it is assumed that the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship is higher than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship, such as Figure 3 As shown in the figure, when the APL value is less than the preset APL value (for example, 64, equivalent to Figure 3 When the white window is about 25% as shown in , the peak brightness curve can be divided into two levels (i.e., the first mapping relationship and the second mapping relationship).

[0077] The display device can respond to the power-on command and use the first mapping relationship to control the backlight brightness of the display screen. When the APL value is continuously less than the preset APL value and the time exceeds the estimated time (such as the second preset time length mentioned above), the curve switches to the low gear, that is, it is determined to use the second mapping relationship to control the backlight brightness of the display screen. When the low gear time exceeds the estimated time (such as the first preset time length mentioned above) and the APL is greater than the estimated value, it switches back to the high gear, that is, it switches back to the first mapping relationship to control the backlight brightness of the display screen. For example, with Figure 3 For example, when the machine is turned on, the curve is high. When the APL value is less than 64 for more than 5 minutes, the curve switches to low. When the low-speed value exceeds 5 minutes and the APL value is greater than 64, the curve switches back to high.

[0078] ​The above-mentioned first preset duration, second preset duration, and preset APL value can be determined through offline experiments, so that when the APL value is greater than the intersection point, the temperature at which the backlight continuously operates will not exceed the maximum operating temperature of all components, thereby increasing the service life of the backlight module.

[0079] During the process of switching from the first mapping relationship to the second mapping relationship, when the brightness is decreasing, mean filtering can be performed to prevent discomfort caused by a sudden decrease in brightness, improving the user experience. When switching from the second mapping relationship to the first mapping relationship, as Figure 3 shown, the backlight brightness corresponding to the APL values greater than the preset APL value in the first mapping relationship and the second mapping relationship is the same. Therefore, when switching from the second mapping relationship to the first mapping relationship, the backlight brightness remains unchanged. Therefore, when switching the second mapping relationship to the first mapping relationship, mean filtering is not required.

[0080] In this embodiment, the backlight brightness corresponding to the APL values greater than the preset APL value in the first mapping relationship and the second mapping relationship can be the same, increasing the reuse of the peak brightness curve. Therefore, the display device can only be perceived when switching from high brightness to low brightness, and is not perceived when switching from low brightness to high brightness, reducing the number of sudden changes in backlight brightness during high and low gear switching, improving the user experience and ensuring high brightness display and avoiding excessive temperature of the backlight module.

[0081] Figure 4 This is a schematic structural diagram of a display brightness adjustment device provided by the present application. As Figure 4 shown, the device includes: a first control module 21, a determination module 22, and a second control module 23. Among them,

[0082] The first control module 21 is used to control the backlight brightness of the display screen by using the first mapping relationship between the average pixel level APL value of the display screen and the backlight brightness.

[0083] The determination module 22 is used to determine whether to use the second mapping relationship between the APL value of the display screen and the backlight brightness according to the APL value of the display screen and the preset APL value.

[0084] The second control module 23 is used to control the backlight brightness of the display screen by using the second mapping relationship when it is determined to use the second mapping relationship between the APL value of the display screen and the backlight brightness. Among them, the backlight brightness of the display screen corresponding to the APL values less than the preset APL value in the second mapping relationship is different from that in the first mapping relationship.

[0085] Taking the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship being higher than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship as an example, optionally, the first control module 21 is specifically configured to, in response to a power-on instruction, control the backlight brightness of the display screen using the first mapping relationship. Or, the first control module 21 is specifically configured to, when the APL value changes from less than the preset APL value to greater than or equal to the preset APL value and the backlight brightness of the display screen is controlled using the second mapping relationship for a first preset duration, control the backlight brightness of the display screen using the first mapping relationship.

[0086] Optionally, the determination module 22 is specifically configured to determine to use the second mapping relationship when the APL value changes from greater than or equal to the preset APL value to less than the preset APL value and remains less than the preset APL value for a second preset duration.

[0087] Taking the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship being lower than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship as an example, optionally, the first control module 21 is specifically configured to control the backlight brightness of the display screen using the first mapping relationship when the APL value changes from greater than or equal to the preset APL value to less than the preset APL value and remains less than the preset APL value for a second preset duration.

[0088] Optionally, the determination module 22 is specifically configured to determine to use the second mapping relationship when the APL value changes from less than the preset APL value to greater than or equal to the preset APL value and the backlight brightness of the display screen is controlled using the first mapping relationship for a first preset duration.

[0089] Taking the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the first mapping relationship being higher than the backlight brightness of the display screen corresponding to the APL value less than the preset APL value in the second mapping relationship as an example, optionally, the second control module 23 is specifically configured to determine a first backlight brightness corresponding to the APL value of the display screen using the first mapping relationship, and determine a second backlight brightness corresponding to the APL value of the display screen using the second mapping relationship; perform smoothing filtering on the first backlight brightness and the second backlight brightness to obtain at least one brightness value between the first backlight brightness and the second backlight brightness; and control the backlight brightness of the display screen according to the at least one brightness value.

[0090] Optionally, the backlight brightness of the display screen corresponding to the APL value greater than or equal to the preset APL value in the second mapping relationship is the same as that in the first mapping relationship.

[0091] The display brightness adjustment device provided in this application is used to execute the display brightness adjustment method embodiments executed by the foregoing electronic device, and its implementation principle and technical effects are similar, which will not be elaborated here.

[0092] This application also provides a computer-readable storage medium, which may include: various media that can store program codes such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs. Specifically, program instructions are stored in this computer-readable storage medium, and the program instructions are used for the methods in the foregoing embodiments.

[0093] This application also provides a program product, which includes execution instructions stored in a readable storage medium. At least one control module of the display device can read the execution instructions from the readable storage medium, and the at least one control module executes the execution instructions to enable the display device to implement the display brightness adjustment method provided by the above various embodiments.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, rather than to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application.

[0095] For the sake of convenience of explanation, the above description has been made in combination with specific implementation manners. However, the above exemplary discussion is not intended to be exhaustive or to limit the implementation manners to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above implementation manners are for better explaining the principles and actual applications, so that those skilled in the art can better use the implementation manners and various different variations of the implementation manners suitable for specific use considerations.

Claims

1. A display device, characterized in that: The display device comprises: A display screen, used for displaying images; A processor connected to the display screen is configured to: The backlight brightness of the display screen is controlled by using a first mapping relationship between an average pixel level APL value of the display screen and backlight brightness; Determining whether to use a second mapping relationship between the APL value of the display screen and backlight brightness according to the APL value of the display screen and a preset APL value; If so, the second mapping relationship is used to control the backlight brightness of the display screen; the backlight brightness of the display screen corresponding to the APL value smaller than the preset APL value in the second mapping relationship is different from that in the first mapping relationship.

2. The display device according to claim 1, characterized in that If the backlight brightness of the display screen corresponding to the APL value smaller than the preset APL value in the first mapping relationship is higher than the backlight brightness of the display screen corresponding to the APL value smaller than the preset APL value in the second mapping relationship, then the backlight brightness of the display screen is controlled by using the first mapping relationship between the average pixel level APL value of the display screen and the backlight brightness, including: In response to a power-on instruction, using the first mapping relationship to control the backlight brightness of the display screen; Alternatively, when the APL value changes from less than the preset APL value to greater than or equal to the preset APL value, and the backlight brightness control of the display screen using the second mapping relationship continues for a first preset time period, the backlight brightness control of the display screen is performed using the first mapping relationship.

3. The display device according to claim 2, characterized in that The determining whether to use the second mapping relationship between the APL value of the display screen and the backlight brightness according to the APL value of the display screen and the preset APL value includes: When the APL value changes from being greater than or equal to the preset APL value to being less than the preset APL value, and is less than the preset APL value for a second preset time period, it is determined to use the second mapping relationship.

4. The display device according to claim 1, characterized in that If the backlight brightness of the display screen corresponding to the APL value smaller than the preset APL value in the first mapping relationship is lower than the backlight brightness of the display screen corresponding to the APL value smaller than the preset APL value in the second mapping relationship, then the backlight brightness of the display screen is controlled by using the first mapping relationship between the average pixel level APL value of the display screen and the backlight brightness, including: When the APL value changes from being greater than or equal to the preset APL value to being less than the preset APL value and being less than the preset APL value for a second preset time period, the first mapping relationship is used to control the backlight brightness of the display screen.

5. The display device according to claim 4, characterized in that The determining whether to use the second mapping relationship between the APL value of the display screen and the backlight brightness according to the APL value of the display screen and the preset APL value includes: When the APL value changes from less than the preset APL value to greater than or equal to the preset APL value, and the backlight brightness control of the display screen using the first mapping relationship continues for a first preset time period, it is determined to use the second mapping relationship.

6. The display device according to any one of claims 1 to 3, characterized in that: If the backlight brightness of the display screen corresponding to the APL value smaller than the preset APL value in the first mapping relationship is higher than the backlight brightness of the display screen corresponding to the APL value smaller than the preset APL value in the second mapping relationship, the backlight brightness of the display screen is controlled by using the second mapping relationship, including: Determine a first backlight brightness corresponding to the APL value of the display screen by using the first mapping relationship, and determine a second backlight brightness corresponding to the APL value of the display screen by using the second mapping relationship; Performing smoothing filtering on the first backlight brightness and the second backlight brightness to obtain at least one brightness value between the first backlight brightness and the second backlight brightness; The backlight brightness of the display screen is controlled according to the at least one brightness value.

7. The display device according to any one of claims 1 to 5, characterized in that: The backlight brightness of the display screen corresponding to the APL value greater than or equal to the preset APL value in the second mapping relationship is the same as that in the first mapping relationship.

8. A display brightness adjustment method, characterized in that: The method comprises: The backlight brightness of the display screen is controlled by using a first mapping relationship between an average pixel level APL value of the display screen and the backlight brightness; Determining whether to use a second mapping relationship between the APL value of the display screen and backlight brightness according to the APL value of the display screen and a preset APL value; If so, the second mapping relationship is used to control the backlight brightness of the display screen; the backlight brightness of the display screen corresponding to the APL value smaller than the preset APL value in the second mapping relationship is different from that in the first mapping relationship.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the method of claim 8 is implemented.

10. A computer program product, characterized in that The invention comprises a computer program, which implements the method of claim 8 when being executed by a processor.

Images