CN114927109B - Backlight source control method and device, display equipment and storage medium - Google Patents
Backlight source control method and device, display equipment and storage medium Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
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- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The application discloses a backlight source control method, a device, display equipment and a storage medium, wherein the method comprises the following steps: acquiring current brightness information of a screen; determining a brightness value of a backlight area corresponding to the screen according to the current brightness information of the screen, and calculating an average brightness value according to the brightness value of the backlight area; acquiring a reference brightness value determined in a preset period, and performing deviation calculation on the average brightness value according to the reference brightness value to obtain a brightness deviation value; and adjusting the backlight brightness of the backlight area in the target period according to the brightness deviation value. The application can dynamically detect and adjust the backlight brightness of the display equipment, improves the accuracy of backlight adjustment and ensures that the screen display effect is better.
Description
Technical Field
The present application relates to the field of backlight display technologies, and in particular, to a backlight control method, a device, a display apparatus, and a storage medium.
Background
Most of the current LCD displays use Cold Cathode Fluorescent Lamp (CCFL) backlight or LED static backlight, which causes energy waste and dynamic blur due to the difficulty in controlling CCFL brightness and slow response speed. The effect of the LED static backlight is good, but the energy consumption is serious, in addition, the contrast of an image is reduced due to the constant brightness backlight, the display effect is not ideal, and a user needs to face an excessively bright or excessively dark picture for a long time in the use process, so that visual fatigue is caused, the existing display equipment cannot dynamically detect and adjust the brightness of the backlight after being started, the accuracy of the backlight adjusting mode of the display equipment is insufficient, and the screen display effect is poor.
Disclosure of Invention
In a first aspect, the present application provides a backlight control method, including:
acquiring current brightness information of a screen;
determining a brightness value of a backlight area corresponding to the screen according to the current brightness information of the screen, and calculating an average brightness value according to the brightness value of the backlight area;
acquiring a reference brightness value determined in a preset period, and performing deviation calculation on the average brightness value according to the reference brightness value to obtain a brightness deviation value;
and adjusting the backlight brightness of the backlight area in the target period according to the brightness deviation value.
Preferably, the determining the luminance value of the backlight area corresponding to the screen according to the current luminance information of the screen, and calculating the average luminance value according to the luminance value of the backlight area includes:
determining pixel data of each display area in the screen;
determining current brightness information of the display area according to the pixel data of the display area, and determining a backlight area corresponding to the display area;
calculating a brightness value corresponding to the backlight area according to the current brightness information of the display area;
and carrying out average calculation on the brightness value of the backlight area to determine an average brightness value.
Preferably, the predetermined period includes a first period and a second period; the obtaining the reference brightness value determined in the preset period, and performing deviation calculation on the average brightness value according to the reference brightness value, so as to obtain a brightness deviation value comprises the following steps:
acquiring a first reference brightness value of the first period and a second reference brightness value of the second period;
calculating a first difference between the first reference luminance value and the average luminance value and a second difference between the second reference luminance value and the average luminance value according to the first reference luminance value and the second reference luminance value;
and calculating the first difference value and the second difference value to determine the brightness deviation value.
Preferably, the brightness deviation value is calculated by the following formula:
wherein w is more than or equal to 2,K and is the brightness deviation value, n is the number of the first reference brightness value and the second reference brightness value, and X t For the first reference brightness value, V t And P is the average brightness value for the second reference brightness value.
Preferably, the method further comprises:
acquiring first brightness information of the backlight area and second brightness information of the screen;
calculating the relation between the first brightness information and the second brightness information according to the first brightness information and the second brightness information so as to determine the adjustment strategy of the backlight area;
and adjusting the current brightness value of the backlight area according to the adjustment strategy.
Preferably, the determining, according to the first luminance information and the second luminance information, a relationship between the first luminance information and the second luminance information to obtain the adjustment policy of the backlight area includes:
calculating a proportional relationship between the first brightness value and the second brightness information according to the first brightness information and the second brightness information;
when the proportional relation is larger than a preset value, determining that the adjustment strategy of the backlight area is a first adjustment strategy;
and when the proportional relation is smaller than or equal to a preset value, determining the adjustment strategy of the backlight area as a second adjustment strategy.
Preferably, the adjusting the current brightness value of the backlight area according to the adjustment policy includes:
when the adjustment strategy of the backlight area is a first adjustment strategy, determining a corresponding screen brightness value and screen display duration according to the second brightness information, and adjusting the backlight area according to the screen brightness value and the screen display duration;
and when the adjustment strategy of the backlight area is a second adjustment strategy, determining a corresponding backlight brightness value according to the first brightness information, and adjusting the backlight area according to the backlight brightness value and the screen display duration.
In a second aspect, an embodiment of the present application provides a backlight control apparatus, including:
the acquisition module is used for acquiring current brightness information of the screen;
the determining module is used for determining the brightness value of the backlight area corresponding to the screen according to the current brightness information of the screen, and calculating an average brightness value according to the brightness value of the backlight area;
the calculation module is used for obtaining a reference brightness value determined in a preset period, and carrying out deviation calculation on the average brightness value according to the reference brightness value so as to obtain a brightness deviation value;
and the adjusting module is used for adjusting the backlight brightness of the backlight area in the target period according to the brightness deviation value.
In a third aspect, an embodiment of the present application provides a display device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the steps of the backlight control method described above are implemented when the processor executes the computer program.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of a backlight control method as described above.
The scheme of the application at least comprises the following beneficial effects:
the application provides a backlight control method, which comprises the steps of firstly obtaining current brightness information of a screen; determining a brightness value of a backlight area corresponding to the screen according to the current brightness information of the screen, and calculating an average brightness value according to the brightness value of the backlight area; then obtaining a reference brightness value determined in a preset period, and carrying out deviation calculation on the average brightness value according to the reference brightness value to obtain a brightness deviation value; and finally, adjusting the backlight brightness of the backlight area in the target period according to the brightness deviation value. Therefore, the backlight brightness of the display equipment can be dynamically detected and adjusted, the accuracy of backlight adjustment is improved, and the screen display effect is better.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an overall flow chart of a backlight control method according to an embodiment of the present application;
FIG. 2 is a schematic diagram of another flow chart of a backlight control method according to an embodiment of the present application;
fig. 3 is a block diagram of a backlight control device according to an embodiment of the present application;
fig. 4 is a block diagram of a display device according to an embodiment of the present application.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms first, second, third and the like in the description and in the claims of the application and in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the term "include" and any variations thereof is intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
The following embodiments of the present application will be described by way of example with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present application provides a backlight control method, including:
s10, acquiring current brightness information of a screen.
In this embodiment, the screen may be an LCD screen, and the screen may be displayed by RGB pixels of the image, where the RGB pixels also include corresponding luminance information, and the luminance information of the current RGB pixels of the screen may be obtained and analyzed, so that the luminance information of the screen at the current time may be determined; when the current brightness information of the screen is acquired, the current brightness information of the screen can be acquired through the light sensor, and when different scenes such as a bright scene, a dark scene and the like are displayed on the screen, the screen can correspond to the different brightness information, for example, the brightness corresponding to the bright scene is higher, the corresponding color temperature value is larger, the brightness corresponding to the dark scene is lower, and the corresponding color temperature is lower; it can be understood that when the backlight of different screens is adjusted and tested, the backlight of different screens can be adjusted later after the current brightness information of the screens is acquired and analyzed because the display effect of the different screens is different.
S20, determining the brightness value of the backlight area corresponding to the screen according to the current brightness information of the screen, and calculating an average brightness value according to the brightness value of the backlight area.
In this embodiment, different areas of the screen may display different scenes, the backlight area may be composed of a plurality of LED backlight sources, and may correspond to different areas of the screen for display, and in the process that the backlight sources correspond to the screen for display, the brightness value of the backlight may be reduced or increased along with the different areas of the screen, so that the display effect of the screen image is better; when the backlight areas are controlled, the sectional brightness control can be performed from the transverse direction and the sectional brightness control can be performed from the longitudinal direction, the average brightness value is calculated for the brightness value of each backlight area by determining the brightness values of a plurality of backlight areas, and then the brightness of each backlight area can be adjusted later; the brightness value may be a plurality of brightness values obtained for a certain time period, for example, each second of the image displayed by the screen contains 5 frames of still images, so that the brightness value of the backlight area can determine 5 different brightness values for the 5 frames of still images, and further determine the average brightness value of each backlight area; in an alternative embodiment, a plurality of luminance values may be determined from the entire backlight area, and an average luminance value of the entire backlight area may be calculated.
Specifically, determining the luminance value of the backlight area corresponding to the screen according to the current luminance information of the screen, and calculating the average luminance value according to the luminance value of the backlight area includes: determining pixel data of a display area aiming at each display area in a screen; determining current brightness information of the display area according to pixel data of the display area, and determining a backlight area corresponding to the display area; calculating a brightness value corresponding to the backlight area according to the current brightness information of the display area; and carrying out average calculation on the brightness value of the backlight area to determine an average brightness value.
In this embodiment, when determining the current brightness information of the screen, since the screen has a plurality of different display areas, by calculating the pixel data of each display area, the pixel data may be represented as a combination of a plurality of pixels, for example, horizontal 2048 pixels and vertical 1080 pixels, and the pixel data of the display area may be determined to be 2211840 pixels, and by performing brightness signal recognition on the pixel data of the different display areas, the current brightness information of the screen is determined; it can be understood that when determining the current brightness information of each display area, the backlight area can display backlight corresponding to different display areas, so that after calculating the brightness value of each backlight area, the average brightness value of each backlight area is determined, and the brightness of the backlight area can be adjusted according to the average brightness value, so that better screen display effect can be ensured through backlight.
S30, acquiring a reference brightness value determined in a preset period, and performing deviation calculation on the average brightness value according to the reference brightness value to obtain a brightness deviation value.
In this embodiment, the predetermined period includes a first period and a second period, the first period and the second period may be two periods before the current time, and the first period and the second period may be two continuous time periods after the screen is turned on, that is, the average brightness value of the backlight area may be calculated after the current brightness of the screen is analyzed after the screen is turned on; the reference brightness value may be an average brightness value calculated in the first period or the second period, and in the process of adjusting the backlight area, the reference brightness value in the predetermined period is used as a reference, and deviation calculation is performed on the average brightness value determined in the current time, so that a brightness deviation value between the backlight brightness generated from the predetermined period to the current time in the backlight area can be determined; the first period, the second period and the current time can be three continuous seconds, different average brightness values can be correspondingly calculated every second, and the brightness deviation value can be determined by carrying out deviation calculation on the reference brightness value and the average brightness value of the current time, so that whether the backlight area needs to be adjusted or not can be determined according to the brightness deviation value.
Specifically, the obtaining the reference luminance value determined in the predetermined period, and performing a deviation calculation on the average luminance value according to the reference luminance value, so as to obtain a luminance deviation value includes: acquiring a first reference brightness value of a first period and a second reference brightness value of a second period; calculating a first difference between the first reference luminance value and the average luminance value and a second difference between the second reference luminance value and the average luminance value according to the first reference luminance value and the second reference luminance value; and calculating the first difference value and the second difference value to determine a brightness deviation value.
Wherein the brightness deviation value is calculated by the following formula:
wherein,w is more than or equal to 2,K and is a brightness deviation value, n is the number of the first reference brightness value and the second reference brightness value, and X t For the first reference brightness value, V t For the second reference luminance value, P is the average luminance value.
In this embodiment, the first reference luminance value represents a value obtained by performing an average calculation on luminance values displayed by a multi-frame image in a backlight area in a first period, the second reference luminance value represents a value obtained by performing an average calculation on luminance values displayed by a multi-frame image in a second period, and after determining the first reference luminance value and the second reference luminance value, a first difference value and a second difference value are calculated according to the above formula, and meanwhile, a luminance deviation value is determined, so that an adjustment mode of the backlight area can be determined by the luminance deviation value; the backlight area is adjusted through the brightness deviation value, so that the brightness value can be adjusted to be proper, the screen is prevented from being in an excessively bright or excessively dark scene for a long time, and the adjustment is more balanced and accurate.
And S40, adjusting the backlight brightness of the backlight area in the target period according to the brightness deviation value.
In this embodiment, the target period may be expressed as a certain time after the current time, for example, 1 second after the current time, after determining the brightness deviation value, by determining whether the brightness deviation value is greater than a preset brightness threshold, when the brightness deviation value is greater than the preset brightness threshold, the brightness of the backlight area may be reduced or increased according to the brightness deviation value; when the brightness value is smaller than a preset brightness threshold value, the backlight area can be enabled to adjust the corresponding backlight brightness according to the preset frequency; thus, the brightness of the backlight area can be more accurately adjusted and more balanced during display.
It can be understood that after the screen is turned on, the brightness of the screen can be increased or decreased along with the screen, and when it is determined that the brightness deviation value of the backlight area is smaller than the preset brightness threshold, the backlight brightness of the backlight area can be controlled to be correspondingly decreased or increased according to a predetermined frequency when the decrease or increase of the brightness of the screen is detected, for example, the predetermined frequency can be adjusted by 10nit/ms, and after the brightness of the backlight area is adjusted, the brightness of the backlight area can be more similar to the brightness of the screen, so that the display effect is improved.
In an alternative embodiment, the method provided in the embodiment of the present application further includes:
101. acquiring first brightness information of a backlight area and second brightness information of a screen;
102. calculating the relation between the first brightness information and the second brightness information according to the first brightness information and the second brightness information so as to determine the adjustment strategy of the backlight area;
103. and adjusting the current brightness value of the backlight area according to the adjustment strategy.
In this embodiment, the first luminance information includes a luminance value and a display duration of the backlight area, and the second luminance information includes a luminance value and a display duration of the screen; when different scenes are displayed on the screen, when the brightness of the backlight is always kept at the same brightness value, the energy consumption of the backlight is relatively high, so that the adjustment strategy of the backlight area can be determined by detecting the current brightness information of the screen; after determining the display time periods of different pictures in the screen, the adjustment strategy may indicate that the backlight area adopts a predetermined frequency to reduce or increase the brightness within the display time period, for example, the display time period of an a picture in the screen is 2 seconds, and then the backlight area may adjust the backlight brightness to match with the a picture within 2 seconds at the predetermined frequency.
Optionally, determining the relationship between the first luminance information and the second luminance information according to the first luminance information and the second luminance information to obtain the adjustment strategy of the backlight area includes: calculating a proportional relationship between the first brightness value and the second brightness information according to the first brightness information and the second brightness information; when the proportion relation is larger than a preset value, determining an adjusting strategy of the backlight area as a first adjusting strategy; and when the proportional relation is smaller than or equal to a preset value, determining the adjustment strategy of the backlight area as a second adjustment strategy.
In this embodiment, the proportion calculation may be performed by the first luminance information of the backlight area and the second luminance information of the screen, so that a proportion relation between the first luminance information and the second luminance information may be determined, where the preset value may be 1, and when the proportion relation is greater than 1, the first luminance information of the backlight area is greater than the second luminance information of the screen, so that an adjustment policy for the backlight area is determined to be a first adjustment policy; when the ratio relation is less than or equal to 1, the first brightness information representing the backlight area is less than or equal to the second brightness information of the screen, and therefore the adjustment strategy of the backlight area is determined to be the second adjustment strategy.
Preferably, adjusting the current brightness value of the backlight area according to the adjustment strategy comprises: when the adjustment strategy of the backlight area is the first adjustment strategy, determining a corresponding screen brightness value and screen display duration according to the second brightness information, and adjusting the backlight area according to the screen brightness value and the screen display duration; when the adjustment strategy of the backlight area is the second adjustment strategy, determining a corresponding backlight brightness value according to the first brightness information, and adjusting the backlight area according to the backlight brightness value and the screen display duration.
In this embodiment, when it is determined that the backlight area adopts the first adjustment policy, the luminance value of the backlight area may be adjusted according to the screen luminance value, and meanwhile, the display duration of the backlight area may correspond to the screen display duration, and when it is determined that the backlight area adopts the second adjustment policy, backlight display may be performed according to the backlight luminance value and the screen display duration; the backlight area can switch the brightness of the backlight along with different pictures of the screen in the display process, so that the energy consumption is reduced, and the overall display effect can be improved.
In an alternative embodiment, the display duration of the backlight area may also be set according to a proportion relation, and when the proportion relation is greater than a preset value, the display duration of the backlight area is calculated according to the proportion relation, so that it may be determined that the display duration of the backlight area is reduced, and when the proportion relation is less than the preset value, the display duration of the backlight area is calculated according to the proportion relation, so that it may be determined that the display duration of the backlight area is increased, and therefore, the display duration of the backlight area may be dynamically adjusted.
The application provides a backlight control method, which comprises the steps of firstly obtaining a current brightness signal of a screen; determining a brightness value corresponding to the backlight area and the screen according to the current brightness information of the screen, and calculating an average brightness value according to the brightness value of the backlight area; then obtaining a reference brightness value determined in a preset period, and carrying out deviation calculation on the average brightness value according to the reference brightness value to obtain a brightness deviation value; and finally, adjusting the backlight brightness of the backlight area in the target period according to the brightness deviation value. Therefore, the backlight brightness of the display equipment can be dynamically detected and adjusted, the accuracy of backlight adjustment is improved, and the screen display effect is better.
In a second aspect, an embodiment of the present application provides a backlight control apparatus 10, including:
an obtaining module 11, configured to obtain current brightness information of a screen;
a determining module 12, configured to determine a luminance value of the backlight area corresponding to the screen according to the current luminance information of the screen, and calculate an average luminance value according to the luminance value of the backlight area;
a calculation module 13, configured to obtain a reference luminance value determined in a predetermined period, and perform deviation calculation on an average luminance value according to the reference luminance value, so as to obtain a luminance deviation value;
and the adjusting module 14 is used for adjusting the backlight brightness of the backlight area in the target period according to the brightness deviation value.
The backlight control device 10 provided by the application firstly obtains the current brightness information of a screen; determining a brightness value corresponding to the backlight area and the screen according to the current brightness information of the screen, and calculating an average brightness value according to the brightness value of the backlight area; then obtaining a reference brightness value determined in a preset period, and carrying out deviation calculation on the average brightness value according to the reference brightness value to obtain a brightness deviation value; and finally, adjusting the backlight brightness of the backlight area in the target period according to the brightness deviation value. Therefore, the backlight brightness of the display equipment can be dynamically detected and adjusted, the accuracy of backlight adjustment is improved, and the screen display effect is better.
It should be noted that, the backlight control apparatus 10 provided in the embodiment of the present application is an apparatus corresponding to the above-mentioned backlight control method, all embodiments of the above-mentioned backlight control method are applicable to the backlight control apparatus 10, and the embodiments of the above-mentioned backlight control apparatus 10 have the steps corresponding to the above-mentioned backlight control method in the corresponding modules, so that the same or similar beneficial effects can be achieved, and in order to avoid excessive repetition, excessive redundant description is not performed on each module in the backlight control apparatus 2.
As shown in fig. 4, the embodiment of the present application further provides a display device 20, including a memory 202, a processor 201, and a computer program stored in the memory 202 and executable on the processor 201, where the processor 201 implements the steps of the above-mentioned backlight control method when executing the computer program.
Specifically, the processor 201 is configured to call a computer program stored in the memory 202, and execute the following steps:
acquiring current brightness information of a screen;
according to the current brightness information of the screen, determining a brightness value corresponding to the backlight area and the screen, and calculating an average brightness value according to the brightness value of the backlight area;
acquiring a reference brightness value determined in a preset period, and performing deviation calculation on the average brightness value according to the reference brightness value to obtain a brightness deviation value;
and adjusting the backlight brightness of the backlight area in the target period according to the brightness deviation value.
Optionally, the determining, by the processor 201, a luminance value of the backlight area corresponding to the screen according to the current luminance information of the screen, and calculating an average luminance value according to the luminance value of the backlight area includes:
determining pixel data of a display area aiming at each display area in a screen;
determining current brightness information of the display area according to pixel data of the display area, and determining a backlight area corresponding to the display area;
calculating a brightness value corresponding to the backlight area according to the current brightness information of the display area;
and carrying out average calculation on the brightness value of the backlight area to determine an average brightness value.
Optionally, the predetermined period includes a first period and a second period; the obtaining of the reference luminance value determined in the predetermined period and the performing the deviation calculation on the average luminance value according to the reference luminance value performed by the processor 201 to obtain the luminance deviation value includes:
acquiring a first reference brightness value of a first period and a second reference brightness value of a second period;
calculating a first difference between the first reference luminance value and the average luminance value and a second difference between the second reference luminance value and the average luminance value according to the first reference luminance value and the second reference luminance value;
and calculating the first difference value and the second difference value to determine a brightness deviation value.
Optionally, the brightness deviation value is calculated by the following formula:
wherein w is more than or equal to 2,K and is the brightness deviation value, n is the number of the first reference brightness value and the second reference brightness value, and X t For the first reference brightness value, V t For the second reference luminance value, P is the average luminance value.
Optionally, the method executed by the processor 201 further includes:
acquiring first brightness information of a backlight area and second brightness information of a screen;
determining a relation between the first brightness information and the second brightness information according to the first brightness information and the second brightness information to obtain a regulation strategy of the backlight area;
and adjusting the current brightness value of the backlight area according to the adjustment strategy.
Optionally, determining, by the processor 201, a relationship between the first luminance information and the second luminance information according to the first luminance information and the second luminance information, to obtain the adjustment policy of the backlight area includes:
calculating a proportional relationship between the first brightness value and the second brightness information according to the first brightness information and the second brightness information;
when the proportion relation is larger than a preset value, determining an adjusting strategy of the backlight area as a first adjusting strategy;
and when the proportional relation is smaller than or equal to a preset value, determining the adjustment strategy of the backlight area as a second adjustment strategy.
Optionally, the adjusting the current brightness value of the backlight area according to the adjustment policy performed by the processor 201 includes:
when the adjustment strategy of the backlight area is the first adjustment strategy, determining a corresponding screen brightness value and screen display duration according to the second brightness information, and adjusting the backlight area according to the screen brightness value and the screen display duration;
when the adjustment strategy of the backlight area is the second adjustment strategy, determining a corresponding backlight brightness value according to the first brightness information, and adjusting the backlight area according to the backlight brightness value and the screen display duration.
That is, in the embodiment of the present application, the steps of the above-mentioned backlight control method are implemented when the processor 201 of the display device 20 executes the computer program, so that the backlight brightness of the display device can be dynamically detected and adjusted, the accuracy of backlight adjustment is improved, and the screen display effect is better.
It should be noted that, since the steps of the above-described backlight control method are implemented when the processor 201 of the display device 20 executes the computer program, all embodiments of the above-described backlight control method are applicable to the display device 20, and the same or similar advantages can be achieved.
The computer readable storage medium provided in the embodiments of the present application stores a computer program, and when the computer program is executed by a processor, the computer program implements each process of the backlight control method or the application-side backlight control method provided in the embodiments of the present application, and can achieve the same technical effect, so that repetition is avoided, and no further description is given here.
Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM) or the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the application, and all equivalent structural changes made by the specification and drawings of the present application or direct/indirect application in other related technical fields are included in the scope of the present application.
Claims (9)
1. A backlight control method, comprising:
acquiring current brightness information of a screen;
determining a brightness value of a backlight area corresponding to the screen according to the current brightness information of the screen, and calculating an average brightness value according to the brightness value of the backlight area;
acquiring a reference brightness value determined in a preset period, and performing deviation calculation on the average brightness value according to the reference brightness value to obtain a brightness deviation value;
adjusting the backlight brightness of the backlight area in the target period according to the brightness deviation value;
the predetermined period includes a first period and a second period; the obtaining the reference brightness value determined in the preset period, and performing deviation calculation on the average brightness value according to the reference brightness value, so as to obtain a brightness deviation value comprises the following steps:
acquiring a first reference brightness value of the first period and a second reference brightness value of the second period;
calculating a first difference between the first reference luminance value and the average luminance value and a second difference between the second reference luminance value and the average luminance value according to the first reference luminance value and the second reference luminance value; the first reference brightness value is obtained by carrying out average calculation on the brightness values of the multi-frame image display in a first period of the backlight area, and the second reference brightness value is obtained by carrying out average calculation on the brightness values of the multi-frame image display in a second period of the backlight area;
and calculating the first difference value and the second difference value to determine the brightness deviation value.
2. The backlight control method according to claim 1, wherein determining a luminance value of a backlight area corresponding to the screen according to current luminance information of the screen, and calculating an average luminance value according to the luminance value of the backlight area comprises:
determining pixel data of each display area in the screen;
determining current brightness information of the display area according to the pixel data of the display area, and determining a backlight area corresponding to the display area;
calculating a brightness value corresponding to the backlight area according to the current brightness information of the display area;
and carrying out average calculation on the brightness value of the backlight area to determine an average brightness value.
3. The backlight control method according to claim 1, wherein the brightness deviation value is calculated by the following formula:
wherein w is more than or equal to 2,K and is the brightness deviation value, n is the number of the first reference brightness value and the second reference brightness value, and X t For the first reference brightness value, V t And P is the average brightness value for the second reference brightness value.
4. The backlight control method according to claim 1, characterized in that the method further comprises:
acquiring first brightness information of the backlight area and second brightness information of the screen;
calculating the relation between the first brightness information and the second brightness information according to the first brightness information and the second brightness information so as to determine the adjustment strategy of the backlight area;
and adjusting the current brightness value of the backlight area according to the adjustment strategy.
5. The method of claim 4, wherein determining a relationship between the first luminance information and the second luminance information according to the first luminance information and the second luminance information to obtain the adjustment strategy of the backlight area comprises:
calculating a proportional relationship between the first brightness information and the second brightness information according to the first brightness information and the second brightness information;
when the proportional relation is larger than a preset value, determining that the adjustment strategy of the backlight area is a first adjustment strategy;
and when the proportional relation is smaller than or equal to a preset value, determining the adjustment strategy of the backlight area as a second adjustment strategy.
6. The backlight control method of claim 5, wherein adjusting the current brightness value of the backlight area according to the adjustment strategy comprises:
when the adjustment strategy of the backlight area is a first adjustment strategy, determining a corresponding screen brightness value and screen display duration according to the second brightness information, and adjusting the backlight area according to the screen brightness value and the screen display duration;
and when the adjustment strategy of the backlight area is a second adjustment strategy, determining a corresponding backlight brightness value according to the first brightness information, and adjusting the backlight area according to the backlight brightness value and the screen display duration.
7. A backlight control apparatus, comprising:
the acquisition module is used for acquiring current brightness information of the screen;
the determining module is used for determining the brightness value of the backlight area corresponding to the screen according to the current brightness information of the screen, and calculating an average brightness value according to the brightness value of the backlight area;
the calculation module is used for obtaining a reference brightness value determined in a preset period, and carrying out deviation calculation on the average brightness value according to the reference brightness value so as to obtain a brightness deviation value;
the adjusting module is used for adjusting the backlight brightness of the backlight area in the target period according to the brightness deviation value;
the predetermined period includes a first period and a second period; the computing module is specifically configured to:
acquiring a first reference brightness value of the first period and a second reference brightness value of the second period;
calculating a first difference between the first reference luminance value and the average luminance value and a second difference between the second reference luminance value and the average luminance value according to the first reference luminance value and the second reference luminance value; the first reference brightness value is obtained by carrying out average calculation on the brightness values of the multi-frame image display in a first period of the backlight area, and the second reference brightness value is obtained by carrying out average calculation on the brightness values of the multi-frame image display in a second period of the backlight area;
and calculating the first difference value and the second difference value to determine the brightness deviation value.
8. A display device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the backlight control method according to any one of claims 1 to 6 when the computer program is executed.
9. A computer-readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the steps of the backlight control method according to any one of claims 1 to 6.
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