CN111210777A - Backlight brightness adjusting method and device, electronic equipment and machine-readable storage medium - Google Patents
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Abstract
The disclosure relates to a backlight brightness adjusting method, a backlight brightness adjusting device, an electronic device and a machine readable storage medium. The backlight brightness adjusting method comprises the following steps: acquiring an image brightness value of an image to be displayed; acquiring a target brightness value of backlight brightness of a display screen according to a preset image brightness value and a target brightness value; and adjusting the current backlight brightness of the display screen based on the target brightness value. Thus, in the embodiment, the backlight brightness of the display screen is adjusted to be matched with the image brightness value, so that the user can read or watch the image more clearly, and the problem that the user cannot see the image clearly or is dazzling is avoided.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a backlight brightness adjustment method and apparatus, an electronic device, and a machine-readable storage medium.
Background
Currently, mobile terminals allow a user to manually adjust the backlight brightness of their display screen so that the backlight brightness of the display screen matches the environment. In dim situations, the backlight brightness of the display screen is adjusted to be the lowest and remains unchanged in any environment, and the display screen is called a night light screen.
However, in the night-light mode, if the gray scale of the media file displayed on the display screen is low, the user cannot see the media file clearly, and the user may be dazzled when the gray scale of the media file is high, which may also affect the reading of the user.
Disclosure of Invention
The present disclosure provides a backlight brightness adjusting method, apparatus, electronic device, and machine-readable storage medium to solve the deficiencies of the related art.
According to a first aspect of the embodiments of the present disclosure, there is provided a backlight brightness adjustment method, including:
acquiring an image brightness value of an image to be displayed;
acquiring a target brightness value of backlight brightness of a display screen according to a preset image brightness value and a target brightness value;
and adjusting the current backlight brightness of the display screen based on the target brightness value.
Optionally, the image to be displayed adopts an RGB format, an HSV space format, or a YUV space format.
Optionally, the acquiring an image brightness value of the image to be displayed includes:
under the condition that the image to be displayed is in an HSV (hue, saturation, value) space format or a YUV space format, acquiring the brightness value of each pixel in the image to be displayed;
and determining an average brightness value of the image to be displayed based on the brightness value of each pixel, wherein the average brightness value is the brightness value of the image.
Optionally, the relationship between the image brightness value and the target brightness value exhibits a negative correlation.
Optionally, the relationship between the image brightness value and the target brightness value shows a step decrease, and a plurality of continuous image brightness values correspond to the same target brightness value; or,
the relationship between the image brightness value and the target brightness value exhibits a negative linear correlation.
Optionally, adjusting the current backlight brightness of the display screen based on the target brightness value comprises:
acquiring a difference value between the target brightness value and the current backlight brightness;
and if the difference exceeds a preset difference threshold, continuously adjusting the current backlight brightness according to a preset step length until the current backlight brightness is equal to the target brightness value.
According to a second aspect of the embodiments of the present disclosure, there is provided a backlight luminance adjusting apparatus including:
the brightness value acquisition module is used for acquiring the image brightness value of the image to be displayed;
the backlight value acquisition module is used for acquiring a target brightness value of backlight brightness of the display screen according to a preset image brightness value and a target brightness value;
and the backlight value adjusting module is used for adjusting the current backlight brightness of the display screen based on the target brightness value.
Optionally, the image to be displayed adopts an RGB format, an HSV space format, or a YUV space format.
Optionally, the brightness value obtaining module includes:
the pixel brightness value acquisition unit is used for acquiring the brightness value of each pixel in the image to be displayed under the condition that the image to be displayed is in an HSV (hue saturation value) space format or a YUV (luminance value) space format;
an image brightness value obtaining unit, configured to determine an average brightness value of the image to be displayed based on a brightness value of each pixel, where the average brightness value is the image brightness value.
Optionally, the relationship between the image brightness value and the target brightness value exhibits negative correlation, including step-down, and multiple continuous image brightness values correspond to the same target brightness value; alternatively, a negative linear correlation.
Optionally, the backlight value adjusting module includes:
a backlight difference value obtaining unit for obtaining a difference value between the target luminance value and the current backlight luminance;
and the backlight value adjusting unit is used for continuously adjusting the current backlight brightness according to a preset step length until the current backlight brightness is equal to the target brightness value when the difference value exceeds a preset difference value threshold value.
According to a third aspect of the embodiments of the present disclosure, there is provided an electronic apparatus including:
a processor;
a memory for storing the processor-executable instructions;
the processor is connected to the memory via a communication bus and is configured to execute executable instructions in the memory to implement the steps of the method of the first aspect.
According to a fourth aspect of embodiments of the present disclosure, there is provided a machine-readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the method of the first aspect.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
according to the embodiment of the disclosure, the target brightness value of the backlight brightness of the display screen can be obtained by obtaining the image brightness value of the image to be displayed and then according to the image brightness value and the preset relationship between the image brightness value and the target brightness value; and then, adjusting the current backlight brightness of the display screen based on the target brightness value. Thus, in the embodiment, the backlight brightness of the display screen is adjusted to be matched with the image brightness value, so that the user can read or watch the image more clearly, and the problem that the user cannot see the image clearly or is dazzling is avoided.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1(a) is a schematic diagram when a luminance value of an image to be displayed is low in the related art;
fig. 1(b) is a schematic diagram when the luminance value of an image to be displayed is high in the related art;
FIG. 2 is a flow chart illustrating a backlight brightness adjustment method according to an exemplary embodiment;
FIG. 3 is a schematic diagram illustrating a process for obtaining luminance values of an image according to an exemplary embodiment;
FIG. 4(a) is a graph illustrating a relationship of a negative linear correlation according to an exemplary embodiment;
FIG. 4(b) is a graph illustrating an inverse-proportional correlation relationship, according to an exemplary embodiment;
FIG. 4(c) is a stepped-down relationship shown in accordance with an exemplary embodiment;
FIG. 4(d) is another stepped-down relationship shown in accordance with an exemplary embodiment;
FIG. 5(a) is an effect diagram after adjusting the backlight brightness based on the image to be displayed shown in FIG. 1 (a);
FIG. 5(b) is an effect diagram after adjusting the backlight brightness based on the image to be displayed shown in FIG. 1 (b);
fig. 6 to 7 are block diagrams illustrating a backlight luminance adjusting apparatus according to an exemplary embodiment;
FIG. 8 is a block diagram illustrating an electronic device in accordance with an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of devices consistent with certain aspects of the present disclosure as recited in the claims below.
Currently, mobile terminals allow a user to manually adjust the backlight brightness of their display screen so that the backlight brightness of the display screen matches the environment. In dim situations, the backlight brightness of the display screen is adjusted to be the lowest and remains unchanged in any environment, and the display screen is called a night light screen.
However, in the night-light mode, referring to fig. 1(a), if the gray scale of the media file displayed on the display screen is low, the user cannot see the media file clearly; referring to fig. 1(b), when the gray level of the media file is relatively high, the media file is more dazzling and the reading of the user is also affected.
In order to solve the above problems, the embodiments of the present disclosure provide a backlight brightness adjustment method, which may be applied to an electronic device provided with a display screen, such as a smart phone, a tablet computer, a control terminal, and the like, and the conception is that the backlight brightness may be matched with an image brightness value of an image to be displayed by adjusting the backlight brightness to a target brightness value, so that the backlight brightness may be correspondingly increased when the image brightness value of the image to be displayed is low, and the image brightness value may be increased, which is beneficial to clearly viewing the image to be displayed; and correspondingly reducing the backlight brightness when the image brightness value of the image to be displayed is higher, so that the image brightness value is lowered, dazzling light in the process of reading the image to be displayed is avoided, and the use experience is improved.
Some embodiments of the disclosed embodiments are described in detail below with reference to the drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Fig. 2 is a flowchart illustrating a backlight brightness adjustment method according to an exemplary embodiment, and referring to fig. 2, a backlight brightness adjustment method includes:
and 201, acquiring an image brightness value of an image to be displayed.
In practical application, based on the working principle of the display, each pixel point in each frame of image to be displayed corresponds to a brightness value. The brightness value is strongly related to the opening degree of the pixel point, namely, the brightness value is large if the opening degree of the pixel point is large, and the brightness value is small if the opening degree of the pixel point is small. Taking the display as an example of a liquid crystal display, the opening degree of the pixel point is strongly related to the liquid crystal rotation angle of the position of the pixel point, namely, if the liquid crystal rotation angle is large, more backlight is transmitted, and the brightness value of the pixel point is large; when the rotation angle of the liquid crystal is small, the transmitted backlight is less, and the brightness value of the pixel point is small.
In this embodiment, the processor in the electronic device may use the content, such as text, video, etc., that needs to be displayed in the next frame as the image to be displayed. And the processor can acquire the brightness value of each pixel point in the image brightness value, so as to obtain the image brightness value of the image to be displayed, wherein the image brightness value can reflect the brightness value of the image to be displayed. The scheme for obtaining the brightness value of the image will be described in the following embodiments, which will not be explained herein.
And 202, acquiring a target brightness value of the backlight brightness of the display screen according to the image brightness value based on a preset relationship between the image brightness value and the target brightness value.
In this embodiment, the relationship between the image brightness value and the target brightness value may be preset in the electronic device. The relationship can be obtained by counting a large number of image brightness values and target brightness values, and can also be obtained by empirical values. In one embodiment, the relationship between the image brightness value and the target brightness value exhibits a negative correlation.
In an embodiment, the processor calls a relationship between an image brightness value and a target brightness value, and the target brightness value of the backlight brightness can be obtained according to the image brightness value.
And 203, adjusting the current backlight brightness of the display screen based on the target brightness value.
In this embodiment, the processor in the electronic device adjusts the current backlight brightness of the display screen based on the target brightness value. The processor can increase or decrease the backlight penetrating the image to be displayed by adjusting the backlight brightness to be increased or decreased, so that the backlight is matched with the image to be displayed, and the problem of over-dark or over-bright is avoided.
Therefore, in the embodiment of the present disclosure, the target brightness value of the backlight brightness of the display screen may be obtained by obtaining the image brightness value of the image to be displayed and then according to the image brightness value and the preset relationship between the image brightness value and the target brightness value; and then, adjusting the current backlight brightness of the display screen based on the target brightness value. Thus, in the embodiment, the backlight brightness of the display screen is adjusted to be matched with the image brightness value, so that the user can read or watch the image more clearly, and the problem that the user cannot see the image clearly or is dazzling is avoided.
Fig. 2 is a flowchart illustrating a backlight brightness adjustment method according to an exemplary embodiment, and referring to fig. 2, a backlight brightness adjustment method includes:
and 201, acquiring an image brightness value of an image to be displayed.
In this embodiment, in the process of displaying the media file, if the media file is an image or a video, the processor in the electronic device may process the media file into a video frame stream for caching, and then display the video frame stream frame by frame from the cache in sequence, where each video frame is used as a frame of image to be displayed; if the media file is a text, the processor in the electronic device may process the text into a plurality of text units, each text unit is a content to be displayed at one time, and the content of each text unit and the template constitute a frame of image to be displayed.
In practical application, the working principle of the display is that each pixel point in each frame of image to be displayed corresponds to a brightness value. The brightness value is strongly related to the opening degree of the pixel point, namely, the brightness value is large if the opening degree of the pixel point is large, and the brightness value is small if the opening degree of the pixel point is small. Taking the display as an example of a liquid crystal display, the opening degree of the pixel point is strongly related to the liquid crystal rotation angle of the position of the pixel point, namely, if the liquid crystal rotation angle is large, more backlight is transmitted, and the brightness value of the pixel point is large; when the rotation angle of the liquid crystal is small, the transmitted backlight is less, and the brightness value of the pixel point is small.
In this embodiment, a processor in the electronic device reads an image to be displayed from a cache. Since the image to be displayed is composed of a plurality of pixels, the processor can acquire the brightness value of each pixel. Since the image to be displayed may take different formats, such as at least one of: RGB format, HSV space format, or YUV space format. Therefore, the manner of acquiring the brightness value by the processor in this embodiment may include the following manners:
in a first manner, referring to fig. 3, after the processor acquires the image to be displayed, the format of the image to be displayed is detected (corresponding to step 301), and if the image to be displayed adopts the RGB format, the processor converts the image to be displayed from the RGB format into the HSV spatial format or the YUV spatial format (corresponding to step 302), and then acquires the luminance value of each pixel (corresponding to step 303).
In a second mode, with reference to fig. 3, after the processor obtains the image to be displayed, the format of the image to be displayed is detected (corresponding to step 301), and if the image to be displayed adopts an HSV spatial format or a YUV spatial format, the processor may directly obtain the luminance value of each pixel (corresponding to step 303).
In this embodiment, the processor in the electronic device may determine an average brightness value of the image to be displayed based on the brightness value of each pixel, where the average brightness value is an image brightness value (corresponding to step 304), and the image brightness value may reflect the brightness value of the image to be displayed.
In one embodiment, the processor may calculate the sum of the luminance values of all pixels, and then divide the sum of the luminance values by the number of pixels to obtain the average luminance value.
In another embodiment, the processor may obtain a sum of luminance values of pixels at a specified position in the image to be displayed, and then divide the sum of luminance values by the number of pixels at the specified position to obtain an average luminance value. Wherein the designated location is a location that is capable of characterizing the brightness of the image to be displayed, such as interlaced select pixels, pixels within an artificially designated area, and the like.
It should be noted that, a skilled person may select a scheme for obtaining the brightness value of the image according to a specific scene, and in the case that the brightness value reflecting the image to be displayed can be obtained, the corresponding scheme falls within the protection scope of the present disclosure.
And 202, acquiring a target brightness value of the backlight brightness of the display screen according to the image brightness value based on a preset relationship between the image brightness value and the target brightness value.
In this embodiment, the relationship between the image brightness value and the target brightness value may be preset in the electronic device. The relationship can be obtained by counting a large number of image brightness values and target brightness values, and can also be obtained by empirical values. In one embodiment, the relationship between the image brightness value and the target brightness value exhibits a negative correlation.
In one embodiment, the relationship between the image brightness value and the target brightness value may be a one-to-one mapping relationship, and accordingly, the negative correlation may be a negative linear correlation, and fig. 4(a) shows a relationship curve of the negative linear correlation; or the negative correlation is an inverse proportional correlation, and fig. 4(b) shows a relationship curve of the inverse proportional correlation.
In another embodiment, the relationship between the image brightness value and the target brightness value may also be a many-to-one mapping relationship, and accordingly, the negative correlation may be a step-down, where a plurality of consecutive image brightness values correspond to the same target brightness value, and fig. 4(c) shows a step-down relationship curve.
In yet another embodiment, the relationship between the image brightness value and the target brightness value may be a one-to-many mapping relationship, and fig. 4(d) shows the corresponding relationship curve.
Of course, the skilled person may also select a suitable relationship between the image brightness value and the target brightness value according to a specific scene, and the relationship is not limited herein.
And 203, adjusting the current backlight brightness of the display screen based on the target brightness value.
In this embodiment, the processor in the electronic device adjusts the current backlight brightness of the display screen based on the target brightness value. It should be noted that, the processor may increase or decrease the backlight penetrating through the image to be displayed by adjusting to increase the backlight brightness or decrease the backlight brightness, so as to visually increase or decrease the image brightness of the image to be displayed, thereby avoiding the problem of too dark or too bright.
For example, continuing with fig. 1(a) as an example, the processor increases the backlight brightness by adjusting the current backlight brightness, so as to increase the light passing through the image to be displayed, and accordingly increase the image brightness value of the image to be displayed, and the effect is shown in fig. 5 (a). Thus, the user can clearly read the image to be displayed.
For another example, continuing with fig. 1(b) as an example, the processor decreases the backlight brightness by adjusting the current backlight brightness, so as to reduce the light passing through the image to be displayed, and accordingly decrease the image brightness value of the image to be displayed, which has the effect shown in fig. 5 (b). Therefore, the user can see the softer image to be displayed, and the dazzling problem is avoided.
Therefore, in the embodiment of the present disclosure, the target brightness value of the backlight brightness of the display screen may be obtained by obtaining the image brightness value of the image to be displayed and then according to the image brightness value and the preset relationship between the image brightness value and the target brightness value; and then, adjusting the current backlight brightness of the display screen based on the target brightness value. Like this, through the corresponding increase of the backlight luminance of adjustment display screen or reduce image brightness value in this embodiment, make the image of waiting to display behind the image brightness value more clear, softer to avoid the user to appear unable clear image or dazzling problem, be favorable to promoting the user and read the experience.
The present disclosure provides a backlight brightness adjusting apparatus, fig. 6 is a block diagram illustrating a backlight brightness adjusting apparatus according to an exemplary embodiment, referring to fig. 6, a backlight brightness adjusting apparatus 600 includes:
a brightness value obtaining module 601, configured to obtain an image brightness value of an image to be displayed;
a backlight value obtaining module 602, configured to obtain a target luminance value of backlight luminance of a display screen according to an image luminance value based on a preset relationship between the image luminance value and the target luminance value;
a backlight value adjusting module 603, configured to adjust the current backlight brightness of the display screen based on the target brightness value.
In an embodiment, the image to be displayed adopts an RGB format, an HSV space format, or a YUV space format.
Fig. 7 is a block diagram illustrating a backlight brightness adjusting apparatus according to an exemplary embodiment, and referring to fig. 7, on the basis of the backlight brightness adjusting apparatus 600 illustrated in fig. 6, the brightness value obtaining module 601 includes:
a pixel brightness value obtaining unit 701, configured to obtain a brightness value of each pixel in the image to be displayed when the image to be displayed is in an HSV spatial format or a YUV spatial format;
an image brightness value obtaining unit 702, configured to determine an average brightness value of the image to be displayed based on the brightness value of each pixel, where the average brightness value is the image brightness value.
In one embodiment, the relationship between the image brightness value and the target brightness value exhibits negative correlation, including step-down, where multiple consecutive image brightness values correspond to the same target brightness value; alternatively, a negative linear correlation.
It can be understood that the backlight brightness adjusting device provided in the embodiments of the present disclosure corresponds to the backlight brightness adjusting method, and specific contents may refer to the contents of each embodiment of the method, which are not described herein again.
FIG. 8 is a block diagram illustrating an electronic device in accordance with an example embodiment. For example, the electronic device 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant or server, and so forth.
Referring to fig. 8, electronic device 800 may also include one or more of the following components: processing component 902, memory 804, power component 806, multimedia component 808, audio component 804, input/output (I/O) interface 812, sensor component 814, communication component 816, and image capture component 818.
The processing component 802 generally operates the entirety of the electronic device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802. In interacting, processor 820 may read executable instructions from memory 804 to implement: steps of the method shown in fig. 2 to 5(a) and 5 (b).
The memory 804 is configured to store various types of data to support operations at the electronic device 800. Examples of such data include instructions for any application or method operating on the electronic device 800, contact data, phonebook data, messages, pictures, videos, and so forth.
The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 806 provides power to the various components of the electronic device 800. The power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 800.
The multimedia component 808 includes a screen that provides an output interface between the electronic device 800 and the target object. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a target object. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or sliding action, but also detect the duration and pressure associated with the touch or operation.
The audio component 804 is configured to output and/or input audio signals. For example, the audio component 804 may include a Microphone (MIC) configured to receive external audio signals when the electronic device 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, the audio component 804 also includes a speaker for outputting audio signals.
The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc.
The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the electronic device 800. For example, the sensor assembly 814 may detect an open/closed state of the electronic device 800, the relative positioning of components, such as a display and keypad of the electronic device 800, the sensor assembly 814 may also detect a change in the position of the electronic device 800 or one of the components, the presence or absence of a target object in contact with the electronic device 800, orientation or acceleration/deceleration of the electronic device 800, and a change in the temperature of the electronic device 800. In this embodiment, the sensor assembly 814 may also include an array of dots in the back cover for sensing user operation.
The communication component 816 is configured to facilitate wired or wireless communication between the electronic device 800 and other devices. The electronic device 800 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the electronic device 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components.
In an exemplary embodiment, a non-transitory machine-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the electronic device 800 is also provided. For example, the non-transitory machine-readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like. Wherein the instructions when executed may implement: steps of the method shown in fig. 2 to 5(a) and 5 (b).
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (13)
1. A backlight brightness adjusting method is characterized by comprising the following steps:
acquiring an image brightness value of an image to be displayed;
acquiring a target brightness value of backlight brightness of a display screen according to a preset image brightness value and a target brightness value;
and adjusting the current backlight brightness of the display screen based on the target brightness value.
2. The backlight brightness adjustment method according to claim 1, wherein the image to be displayed adopts an RGB format, an HSV space format, or a YUV space format.
3. The backlight brightness adjustment method according to claim 2, wherein obtaining an image brightness value of an image to be displayed comprises:
under the condition that the image to be displayed is in an HSV (hue, saturation, value) space format or a YUV space format, acquiring the brightness value of each pixel in the image to be displayed;
and determining an average brightness value of the image to be displayed based on the brightness value of each pixel, wherein the average brightness value is the brightness value of the image.
4. The backlight brightness adjustment method according to claim 1, wherein the relationship between the image brightness value and the target brightness value exhibits a negative correlation.
5. The backlight brightness adjustment method according to claim 4, wherein the relationship between the image brightness value and the target brightness value shows a step-down, and a plurality of consecutive image brightness values correspond to the same target brightness value; or,
the relationship between the image brightness value and the target brightness value exhibits a negative linear correlation.
6. The backlight brightness adjustment method according to claim 1, wherein adjusting the current backlight brightness of the display screen based on the target brightness value comprises:
acquiring a difference value between the target brightness value and the current backlight brightness;
and if the difference exceeds a preset difference threshold, continuously adjusting the current backlight brightness according to a preset step length until the current backlight brightness is equal to the target brightness value.
7. A backlight luminance adjusting apparatus, comprising:
the brightness value acquisition module is used for acquiring the image brightness value of the image to be displayed;
the backlight value acquisition module is used for acquiring a target brightness value of backlight brightness of the display screen according to a preset image brightness value and a target brightness value;
and the backlight value adjusting module is used for adjusting the current backlight brightness of the display screen based on the target brightness value.
8. The backlight brightness adjusting apparatus according to claim 7, wherein the image to be displayed adopts an RGB format, an HSV space format, or a YUV space format.
9. The backlight brightness adjusting apparatus according to claim 8, wherein the brightness value obtaining module comprises:
the pixel brightness value acquisition unit is used for acquiring the brightness value of each pixel in the image to be displayed under the condition that the image to be displayed is in an HSV (hue saturation value) space format or a YUV (luminance value) space format;
an image brightness value obtaining unit, configured to determine an average brightness value of the image to be displayed based on a brightness value of each pixel, where the average brightness value is the image brightness value.
10. The backlight brightness adjustment apparatus according to claim 7, wherein the relationship between the image brightness value and the target brightness value exhibits negative correlation, including step-down, and a plurality of consecutive image brightness values correspond to the same target brightness value; alternatively, a negative linear correlation.
11. The backlight brightness adjusting apparatus according to claim 7, wherein the backlight value adjusting module comprises:
a backlight difference value obtaining unit for obtaining a difference value between the target luminance value and the current backlight luminance;
and the backlight value adjusting unit is used for continuously adjusting the current backlight brightness according to a preset step length until the current backlight brightness is equal to the target brightness value when the difference value exceeds a preset difference value threshold value.
12. An electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
the processor is connected with the memory through a communication bus and is configured to execute the executable instructions in the memory to realize the steps of the method of any one of claims 1 to 6.
13. A machine-readable storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the method of any one of claims 1 to 6.
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