CN114495847B - Backlight brightness control method and device, server and storage medium - Google Patents
Backlight brightness control method and device, server and storage medium Download PDFInfo
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- CN114495847B CN114495847B CN202210159856.8A CN202210159856A CN114495847B CN 114495847 B CN114495847 B CN 114495847B CN 202210159856 A CN202210159856 A CN 202210159856A CN 114495847 B CN114495847 B CN 114495847B
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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
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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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
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
Abstract
The embodiment of the application provides a backlight brightness control method, a device, a server and a storage medium. The method comprises the steps of firstly, obtaining target backlight set values corresponding to a plurality of display partitions in a display panel, and then determining equivalent backlight intensity values corresponding to any pixel unit according to the target backlight set values; meanwhile, according to the equivalent backlight intensity value corresponding to the pixel unit, calculating to obtain the energy consumption corresponding to the pixel unit, and according to the specific numerical value of the target backlight set value corresponding to the pixel unit when the energy consumption is minimum, adjusting the backlight corresponding to the pixel unit according to the numerical value of the target backlight set value, so that the energy consumption of the display panel is minimum. The influence of all the backlight sources on the backlight brightness of the pixel units is considered, and meanwhile, the numerical value of the corresponding target backlight set value when the energy consumption is the lowest can be reversely determined according to the energy consumption, so that the brightness of the backlight sources can be adjusted according to the numerical value of the target backlight set value, and the energy consumption of the display panel can be reduced.
Description
Technical Field
The application relates to the field of display panels, in particular to a backlight brightness control method, a device, a server and a storage medium.
Background
To enhance the display effect, a segmented backlight or local dimming (local dimming) technique is currently used in LCD (Liquid Crystal Display) to increase the contrast ratio. This method divides the backlight of the LCD into different areas, and turns on when the display gray level of a certain area is greater than 0 (the lighting degree is determined by the backlight setting value), and turns off the backlight of the area when displaying black.
In the existing method, only the gray scale influence of the corresponding image of the partition is considered when the backlight set value is calculated, the influence of the adjacent backlight is considered when the backlight set value is calculated subsequently, the total backlight brightness is higher (energy consumption), the LCD pixel control voltage adopting negative liquid crystal is reduced (energy saving), and the LCD pixel control voltage adopting positive liquid crystal is increased (energy consumption). In combination, a high backlight brightness may result in a high power consumption for a negative LCD and a high power consumption for a positive LCD. In addition, the higher backlight brightness can also cause temperature rise, especially if the brightness of the image to be displayed is changed severely, the backlight brightness of certain subareas can be excessively large, larger temperature difference is generated, and the energy consumption is higher.
Disclosure of Invention
The application aims to provide a backlight brightness control method, a device, a server and a storage medium, and aims to solve the problem that in the prior art, the backlight brightness is overlarge, and the energy consumption is high due to the fact that a large temperature difference is generated.
In a first aspect, an embodiment of the present application provides a method for controlling brightness of a backlight, where the backlight is used to control display brightness of a display panel, the display panel includes a plurality of display partitions, each display partition in the plurality of display partitions includes at least one pixel unit, and backlight intensities corresponding to each pixel unit are different; the method comprises the following steps: the method comprises the following steps:
obtaining target backlight set values corresponding to the display partitions respectively, and obtaining a plurality of target backlight set values;
calculating an equivalent backlight intensity value corresponding to a target pixel unit in the at least one pixel unit according to the target backlight set values;
calculating a target energy consumption function corresponding to the target pixel unit according to the equivalent backlight intensity value;
determining the numerical value of the target backlight set value according to the target energy consumption function;
and adjusting the brightness of the backlight source according to the numerical value of the target backlight set value.
In one possible embodiment, any display partition in the plurality of display partitions is taken as a target display partition;
the obtaining the target backlight set values corresponding to the display partitions respectively to obtain a plurality of target backlight set values includes:
Obtaining pixel gray scale values corresponding to all pixel units in the target display partition respectively so as to obtain a pixel gray scale value set;
determining a backlight statistic value corresponding to the target display partition according to the pixel gray-scale value set;
determining a target backlight set value corresponding to the target display partition according to the backlight statistic value;
wherein the pixel gray-scale value set, the backlight statistic and the target backlight set value are all a plurality of; the target display partition corresponds to a defined set of pixel gray scale values, a defined backlight statistic and a defined target backlight setting.
In a possible embodiment, the determining, according to the set of pixel gray-scale values, a backlight statistic corresponding to the target display partition includes:
and determining the backlight statistic value corresponding to the target display partition by using a preset histogram cumulative distribution function.
In a possible embodiment, the determining, according to the backlight statistic, a target backlight setting value corresponding to the target display partition includes:
acquiring a corresponding relation between a preset backlight set value and the backlight statistic value;
and judging the backlight intensity range of the backlight statistic value to determine a target backlight set value corresponding to the target display partition according to the corresponding relation.
In a possible embodiment, the calculating, according to the equivalent backlight intensity value, a target energy consumption function corresponding to the target pixel unit includes:
calculating a compensation backlight intensity value corresponding to the target pixel unit according to the equivalent backlight intensity value;
and obtaining a target energy consumption function corresponding to the target pixel unit according to a preset initial energy consumption function, the compensation backlight intensity value and the equivalent backlight intensity value.
In a possible embodiment, the preset initial energy consumption function includes a first energy consumption function and a second energy consumption function;
the obtaining a target energy consumption function corresponding to the target pixel unit according to a preset initial energy consumption function, the compensation backlight intensity value and the equivalent backlight intensity value comprises the following steps:
obtaining a third energy consumption function corresponding to the equivalent backlight intensity value according to the first energy consumption function and the equivalent backlight intensity value;
obtaining a fourth energy consumption function corresponding to the compensation backlight intensity value according to the second energy consumption function and the compensation backlight intensity value;
the target energy consumption function includes the third energy consumption function and the fourth energy consumption function.
In a possible embodiment, the determining the magnitude of the value of the target backlight setting according to the target energy consumption function includes:
performing partial derivative on the target energy consumption function to obtain a partial derivative function corresponding to the target energy consumption function;
determining the numerical value of a target backlight set value corresponding to the target pixel unit according to the partial derivative function;
the value of the target backlight set value is the backlight set value corresponding to the time when the target energy consumption function is minimum.
In a second aspect, an embodiment of the present application provides a backlight brightness control device, where the backlight is configured to control display brightness of a display panel, where the display panel includes a plurality of display partitions, each display partition in the plurality of display partitions includes at least one pixel unit, and backlight intensities corresponding to each pixel unit are different; the device comprises:
the acquisition module is used for acquiring target backlight set values corresponding to the display partitions respectively to obtain a plurality of target backlight set values;
the first calculation module is used for calculating an equivalent backlight intensity value corresponding to a target pixel unit in the at least one pixel unit according to the target backlight set values;
The second calculation module is used for calculating a target energy consumption function corresponding to the target pixel unit according to the equivalent backlight intensity value;
the third calculation module is used for determining the numerical value of the target backlight set value corresponding to the target pixel unit according to the condition that the value of the target energy consumption function is minimum;
and the adjusting module is used for adjusting the brightness of the backlight source according to the numerical value of the target backlight set value.
In a third aspect, an embodiment of the present application provides a server, including:
one or more processors;
a memory; and
one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement a backlight brightness control method as claimed in any one of the above.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium having stored thereon a computer program to be loaded by a processor to perform the steps in the backlight brightness control method as described in any one of the above.
The embodiment of the application provides a backlight brightness control method, a device, a server and a storage medium. The method comprises the steps of firstly, obtaining target backlight set values corresponding to a plurality of display partitions in a display panel, and then determining equivalent backlight intensity values corresponding to any pixel unit according to the target backlight set values; meanwhile, according to the equivalent backlight intensity value corresponding to the pixel unit, calculating to obtain the energy consumption corresponding to the pixel unit, and according to the specific numerical value of the target backlight set value corresponding to the pixel unit when the energy consumption is minimum, adjusting the backlight corresponding to the pixel unit according to the numerical value of the target backlight set value, so that the energy consumption of the display panel is minimum. The influence of all the backlight sources on the backlight brightness of the pixel units is considered, and meanwhile, the numerical value of the corresponding target backlight set value when the energy consumption is the lowest can be reversely determined according to the energy consumption, so that the brightness of the backlight sources can be adjusted according to the numerical value of the target backlight set value, and the energy consumption of the display panel can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a backlight brightness control system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an embodiment of a backlight brightness function according to the present application;
FIG. 3 is a flowchart illustrating an embodiment of a method for controlling brightness of a backlight source according to an embodiment of the present application;
FIG. 4 is a flowchart illustrating an embodiment of determining an initial backlight setting according to an embodiment of the present application;
FIG. 5 is a flowchart of an embodiment of a calculation energy consumption function according to the present application;
FIG. 6 is a schematic diagram of an embodiment of a backlight brightness control device according to the present application;
fig. 7 is a schematic structural diagram of a server according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. 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 fall within the scope of the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described as "exemplary" in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
It should be noted that, because the method of the embodiment of the present application is executed in the electronic device, the processing objects of each electronic device exist in the form of data or information, for example, time, which is substantially time information, it can be understood that in the subsequent embodiment, if the size, the number, the position, etc. are all corresponding data, so that the electronic device can process the data, which is not described herein in detail.
The embodiment of the application provides a backlight brightness control method, a device, a server and a storage medium, and the method, the device, the server and the storage medium are respectively described in detail below.
Referring to fig. 1, fig. 1 is a schematic view of a scene of a backlight brightness control system according to an embodiment of the application, where the backlight brightness control system may include an electronic device 100, and a backlight brightness control device, such as the electronic device in fig. 1, is integrated in the electronic device 100.
In the embodiment of the present application, the electronic device 100 may be an independent server, or may be a server network or a server cluster formed by servers, for example, the electronic device 100 described in the embodiment of the present application includes, but is not limited to, a computer, a network host, a single network server, a plurality of network server sets, or a cloud server formed by a plurality of servers. Wherein the Cloud server is composed of a large number of computers or web servers based on Cloud Computing (Cloud Computing).
It will be appreciated by those skilled in the art that the application environment shown in fig. 1 is merely an application scenario of the present application, and is not limited to the application scenario of the present application, and other application environments may further include more or fewer electronic devices than those shown in fig. 1, for example, only 1 electronic device is shown in fig. 1, and it will be appreciated that the backlight brightness control system may further include one or more other servers, which is not limited herein.
In addition, as shown in fig. 1, the backlight brightness control system may further include a storage unit 200 for storing data.
It should be noted that, the schematic view of the scene of the backlight brightness control system shown in fig. 1 is only an example, and the backlight brightness control system and the scene described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided by the embodiments of the present application, and as one of ordinary skill in the art can know, along with the evolution of the backlight brightness control system and the appearance of the new service scene, the technical solution provided by the embodiments of the present application is equally applicable to similar technical problems.
First, in an embodiment of the present application, a backlight brightness control method is provided, where an execution body of the backlight brightness control method is a backlight brightness control device, and the backlight brightness control device is applied to an electronic device, and the backlight brightness control method includes: obtaining target backlight set values corresponding to the display partitions respectively, and obtaining a plurality of target backlight set values; calculating an equivalent backlight intensity value corresponding to a target pixel unit in at least one pixel unit according to the target backlight set values; calculating a target energy consumption function corresponding to the target pixel unit according to the equivalent backlight intensity value; determining the numerical value of the target backlight set value according to the target energy consumption function; and adjusting the brightness of the backlight source according to the numerical value of the target backlight set value.
In an embodiment of the present application, the backlight is used to control the display brightness of the display panel, and the display panel generally includes a plurality of display partitions, and a plurality of backlights. Each display partition in the plurality of display partitions comprises at least one pixel unit, and the backlight intensity corresponding to each pixel unit is different; and theoretically the backlight intensity of each pixel cell would be affected by multiple backlights in the display panel.
As shown in fig. 2, an embodiment of the backlight brightness function according to the present application is shown. In the embodiment of the application, for the light generated by one lamp bead on the backlight source, the light finally reaching the pixel unit is attenuated due to the structures such as the optical film layer and the like and the increase of the distance between the pixel unit and the lamp bead. The intensity of light is shown in fig. 2, and the whole body shows a tendency of high middle and low periphery. Wherein, the abscissa is the distance between the pixel unit and the lamp bead, and the ordinate is the intensity of light.
In the embodiment of the present application, a light intensity distribution function f=f (r) is defined, f being any function satisfying the following conditions:
f(0)＝1
f(+∞)＝0
f′(r)<0
wherein r is the distance from the pixel unit to the lamp bead, f' (r) is the derivative of f (r), and a derivative smaller than zero represents f (r) as a decreasing function. After selecting a functional form of f, the parameters of the function can be determined by measuring the light intensity distribution of a lamp bead.
As shown in fig. 3, a flowchart of an embodiment of a method for controlling brightness of a backlight source according to an embodiment of the present application may include:
31. and obtaining target backlight set values corresponding to the display partitions respectively to obtain a plurality of target backlight set values.
When a picture is normally displayed on the display panel, the gray scale value corresponding to the pixel unit is affected by the backlight sources, which results in an increase in energy consumption of the pixel unit. In the embodiment of the application, a target backlight set value is set, and the target backlight set value is the corresponding backlight set value when the energy consumption of the pixel unit is the lowest; the pixel unit is driven by the target backlight set value, so that the minimum energy consumption of the pixel unit can be ensured under the premise of considering the influence of a plurality of backlight sources.
In the embodiment of the application, the display panel is divided into a plurality of different display partitions, each display partition comprises at least one pixel unit, and the target backlight set value corresponding to each display partition is different. Therefore, the target backlight set value corresponding to each of the display partitions can be obtained, so that each display partition can display a picture according to the target backlight set value corresponding to each display partition. Since the display section is plural, the target backlight setting value is plural. One display section corresponds to one target backlight setting value.
As shown in fig. 4, a flowchart of an embodiment of determining a target backlight setting value according to an embodiment of the present application may include:
41. and obtaining pixel gray scale values corresponding to all pixel units in the target display partition respectively to obtain a pixel gray scale value set.
In an ideal case, one pixel unit can be used as one display partition, and the target backlight set value corresponding to each display partition (i.e. each pixel unit) is calculated respectively, but such calculation amount is too large to be suitable for actual calculation of the backlight set value of the display panel.
In an actual display panel, a plurality of pixel units are generally divided into the same display partition, and a target backlight setting value corresponding to the display partition is obtained as a target backlight setting value corresponding to all the pixel units in the display partition.
Thus, in an embodiment of the present application, the backlight intensities corresponding to all the pixel units in a display area need to be considered to determine the target backlight setting value corresponding to the display area.
Specifically, any display partition in the plurality of display partitions is taken as a target partition, and pixel gray scale values corresponding to all pixel units in the target display partition are obtained, so that a pixel gray scale value set corresponding to the target display partition is obtained. The obtained pixel gray-scale value sets actually have a plurality of sets, and one display partition corresponds to one determined pixel gray-scale value set.
42. And determining backlight statistic values corresponding to the target display partition according to the pixel gray-scale value set.
According to the embodiment of the application, the backlight statistical value corresponding to each display partition can be determined according to the pixel gray scale value set corresponding to each display partition.
In some embodiments, a preset histogram cumulative distribution function (Cumulative Distribution Function, CDF) may be utilized to determine the backlight statistics corresponding to the target display partition. Specifically, a gray-scale value average value of pixel units of an image to be displayed in a target display partition range can be calculated and used as a backlight statistic value corresponding to the target display partition.
In other embodiments of the present application, other methods may be used to determine the backlight statistics corresponding to the target display partition, which is not limited herein.
43. And determining a target backlight set value corresponding to the target display partition according to the backlight statistic value.
After determining the backlight statistic value corresponding to the target display partition, the target backlight set value corresponding to the target display partition can be further determined according to the backlight statistic value.
Specifically, a corresponding relation between a preset backlight set value and a backlight statistic value can be obtained; and judging the backlight intensity range in which the backlight statistic value is positioned, so as to determine a target backlight set value corresponding to the target display partition according to the corresponding relation.
In particular, in some embodiments the target backlight setting may be determined using a method of piecewise displacement. Taking four backlight sources as examples, the four backlight sources can provide 16 grades of adjustable backlight intensities, and the backlight set value takes integer multiples of 16 in the interval of 0-240 and corresponds to 16 different backlight intensities respectively. At this time, the target backlight set value may be determined by performing the segment displacement according to the backlight statistic value:
wherein BS (i) is a backlight statistic and B L (i) Setting a value for a target backlight; the X rounding represents a rounding down operation. The above embodiment is a correspondence between the initial backlight setting value and the backlight statistics value, and when the backlight statistics value BS (i) is in different ranges, the corresponding backlight statistics values are different. In other embodiments, the backlight statistics and the backlight setting values may be other corresponding relationships, which are not limited herein.
32. And calculating an equivalent backlight intensity value corresponding to the target pixel unit in at least one pixel unit according to the target backlight set values.
In the above embodiment, the target backlight setting value corresponding to each display partition is obtained, and a plurality of target backlight setting values are obtained. Because the pixel units in one determined display partition are interfered by the backlight sources corresponding to other display partitions when displaying the picture, the equivalent backlight intensity value corresponding to the target pixel unit is required to be calculated according to a plurality of target backlight set values in the embodiment of the application.
It should be noted that, in the embodiment of the present application, the target pixel unit is not related to the target display area, and the target pixel unit may be a pixel unit in the target display area or may not be a pixel unit in the target display area.
33. And calculating a target energy consumption function corresponding to the target pixel unit according to the equivalent backlight intensity value.
34. And determining the numerical value of the target backlight set value according to the target energy consumption function value.
35. And adjusting the brightness of the backlight source according to the numerical value of the target backlight set value.
After determining the equivalent backlight intensity value corresponding to the target pixel unit, the energy consumption corresponding to the pixel unit can be further determined. The embodiment of the application hopes that the energy consumption corresponding to the target pixel unit is the lowest so as to avoid generating larger temperature difference and influencing the picture display; and simultaneously, a great amount of resource waste is avoided.
The energy consumption obtained by calculation in the embodiment of the application is actually a function related to the energy consumption, and the minimum energy consumption can be set so as to determine the target backlight set value corresponding to the target pixel unit when the energy consumption is minimum according to the function of the energy consumption; and adjusting the backlight brightness according to the target backlight set value so that the target pixel unit can display a picture according to the target backlight set value.
The embodiment of the application provides a backlight brightness control method, which comprises the steps of firstly obtaining target backlight set values corresponding to a plurality of display partitions in a display panel, and then determining equivalent backlight intensity values corresponding to any pixel unit according to the target backlight set values; meanwhile, according to the equivalent backlight intensity value corresponding to the pixel unit, calculating to obtain the energy consumption corresponding to the pixel unit, and according to the specific numerical value of the target backlight set value corresponding to the pixel unit when the energy consumption is minimum, adjusting the backlight corresponding to the pixel unit according to the numerical value of the target backlight set value, so that the energy consumption of the display panel is minimum. The influence of all the backlight sources on the backlight brightness of the pixel units is considered, and meanwhile, the numerical value of the corresponding target backlight set value when the energy consumption is the lowest can be reversely determined according to the energy consumption, so that the brightness of the backlight sources can be adjusted according to the numerical value of the target backlight set value, and the energy consumption of the display panel can be reduced.
As shown in fig. 5, a flowchart of an embodiment of the present application for calculating an energy consumption function may include:
51. and calculating a compensation backlight intensity value corresponding to the target pixel unit according to the equivalent backlight intensity value.
Specifically, in the embodiment of the present application, since the pixel unit cannot display according to the actual backlight intensity due to various reasons when the pixel unit actually displays the screen, compensation is required for the pixel unit.
In the embodiment of the present application, the compensated backlight intensity value corresponding to the target pixel unit may be a difference between the backlight intensity actually required to be displayed by the pixel unit and the equivalent backlight intensity value. Specifically, the backlight intensity actually required to be displayed by the pixel unit may be subtracted from the equivalent backlight intensity value corresponding to the pixel unit.
It should be noted that, when the gray-scale values corresponding to all the pixel units in each display area are obtained, the pixel gray-scale values corresponding to each pixel unit are already obtained; in actual display, the pixel gray-scale value and the backlight intensity corresponding to the pixel unit are also corresponding in practice. Therefore, the pixel gray scale value corresponding to the pixel unit is obtained, which is actually equivalent to the obtained backlight intensity corresponding to the pixel unit and actually required to be displayed.
52. And obtaining a target energy consumption function corresponding to the target pixel unit according to the preset initial energy consumption function, the compensation backlight intensity value and the equivalent backlight intensity value.
Since the backlight intensity corresponding to the pixel unit actually includes the compensated backlight intensity value and the equivalent backlight intensity value, both the compensated backlight intensity value and the equivalent backlight intensity value actually generate energy consumption.
Thus in an embodiment of the application, the preset initial energy consumption function actually comprises a first energy consumption function and a second energy consumption function. According to the first energy consumption function and the equivalent backlight intensity value, a third energy consumption function corresponding to the equivalent backlight intensity value can be obtained; and obtaining a fourth energy consumption function corresponding to the compensated backlight intensity value according to the compensated backlight intensity value and the second energy consumption function.
The target energy consumption corresponding to the target pixel unit actually comprises the energy consumption generated by the compensation backlight intensity value corresponding to the target pixel unit and the energy consumption generated by the equivalent backlight intensity value corresponding to the target pixel unit. Namely, the target energy consumption function corresponding to the target pixel unit comprises the following steps: compensating the third energy consumption function corresponding to the backlight intensity value and the fourth energy consumption function generated by the equivalent backlight intensity value.
After the target energy consumption function is determined, the energy consumption generated by the target pixel unit in normal display of the picture can be calculated according to the target energy consumption function.
In an embodiment of the present application, determining the value of the target backlight setting value corresponding to the target pixel unit when the energy consumption is minimum may include:
performing partial derivative on the target energy consumption function to obtain a partial derivative function corresponding to the target energy consumption function; and determining the numerical value of the target backlight set value corresponding to the target pixel unit according to the partial derivative function. The value of the target backlight set value is the backlight set value corresponding to the time when the target energy consumption function is minimum.
Specifically, the target energy consumption function obtained in the embodiment of the application is actually a function including a backlight set value, in the embodiment of the application, the target backlight set value with the lowest energy consumption is taken as an unknown quantity, and the target energy consumption function is subjected to deviation so as to obtain a deviation function corresponding to the target energy consumption function. And setting the energy consumption as the minimum value, and solving the optimal backlight set value according to the partial derivative function.
In the embodiment of the application, the target backlight set value when the energy consumption is the lowest can be set as X, and the X is taken as a known quantity, so that the equivalent backlight intensity and the target energy consumption function are obtained through calculation, wherein the target energy consumption function is a function related to X. And then, calculating a partial derivative function of the energy consumption function by using a mathematical algorithm, and determining the specific numerical value corresponding to X when the energy consumption is lowest, thus obtaining the specific numerical value of the target backlight set value.
In one embodiment of the application, B D (j) For the image to be displayed, the corresponding backlight intensity (or pixel gray level value) is needed when the jth pixel unit is displayed, and the pixel unit B corresponding to the ith display partition D (j) Is set as<B D (j)> i . J is 1, 2 … J, and J is the total number of pixel units, I is 1, 2 … I, and I is the number of display sections. In the embodiment of the application, the backlight statistical value of the display partition is calculated as B according to the backlight intensities corresponding to the pixel units S (i) A. The application relates to a method for producing a fibre-reinforced plastic composite Assuming that the statistical method is denoted by g, it can be obtained:
B s (i)＝g((B D (j)) i )
in the application, the backlight statistical value B corresponding to each display partition is required to be calculated S (i) Thus backlight statistic B S (i) A plurality of the water treatment devices. After obtaining the backlight statistics, the backlight device corresponding to the display partition is also required to be obtained according to the backlight statisticsConstant B L (i) A. The application relates to a method for producing a fibre-reinforced plastic composite Assuming the method is denoted as h, one can obtain:
B L (i)＝(B S (i))
meanwhile, the influence of the backlight sources in other display partitions on the pixel units in the current display partition needs to be considered, so that the equivalent backlight intensity value B corresponding to each pixel unit is calculated eq (j) The method can obtain the following steps:
the above equation for calculating the equivalent backlight intensity value considers the effect of all backlight partitions on the backlight intensity of the pixel cell. Lambda is the attenuation coefficient of the light, because there is a fixed proportion of attenuation of the light emitted by the beads through the optical film layer to the display panel, and in the embodiment of the application, the fixed proportion of attenuation is lambda. r is (r) kj Representing the distance from the jth pixel cell to the light bead in the kth display partition. And B is L (k) I.e. the backlight setting value of the kth backlight partition.
The equivalent backlight intensity value corresponding to the pixel unit determined in the above embodiment, because the pixel unit needs to control the liquid crystal to compensate the pixel unit, the compensation backlight intensity value corresponding to the pixel unit needs to be determined, which may be:
δ j ＝B D (j)-B eq (j)
wherein B is D (j) Namely, the j-th pixel unit needs corresponding backlight intensity (or pixel gray scale value) during normal display; b (B) eq (j) The equivalent backlight intensity value corresponding to the j-th pixel unit is obtained. The difference value of the two is the compensation backlight intensity value which needs to be compensated for the jth pixel unit.
Combining the formulas, in the ith display area, can obtain:
wherein, the liquid crystal display device comprises a liquid crystal display device,<δ j > i the value of the j-th pixel unit is shown in the i-th display area.
The above formula can be further expressed as:
wherein g -1 And -1 the inverse functions of g and h are shown, respectively. Accumulating the above formula from i=1 to I, then there is:
the above formula can be further derived:
at this time, assume that the equivalent backlight intensity value is B L (i) The corresponding energy consumption is W B (B L (i) Control of liquid crystal production delta j Corresponding energy consumption W when compensating backlight intensity value δ (δ j ) The total energy consumption corresponding to the pixel unit is:
that is, the total energy consumption corresponding to the pixel units in the embodiment of the application is the sum of the energy consumption generated by the equivalent backlight intensity value and the energy consumption generated by the compensation backlight intensity value.
Substituting delta into the formula j The method can obtain the following steps:
the formula is the target energy consumption function corresponding to the pixel unit, if the target back corresponding to the pixel unit is to be determinedAnd obtaining a corresponding partial derivative function by solving the partial derivative of the formula for the light set value. Meanwhile, as the target backlight set value is the backlight set value corresponding to the minimum energy consumption, when the energy consumption W takes the minimum value, the W is opposite to the B L (i) Should be 0.
Since i=1, 2 … I in the above formula, I partial derivatives can be obtained: i are:
according to the above I formulas, when the energy consumption W is the lowest, the target backlight set values corresponding to the different display partitions, namely the I target backlight set values, can be obtained.
That is, in the embodiment of the present application, when determining the target backlight setting value corresponding to the target pixel unit by using the partial derivative function corresponding to the target energy consumption function, the target backlight setting values corresponding to all the backlight partitions are obtained at the same time, and the target backlight setting value corresponding to each of the backlight partitions is used as the target backlight setting value corresponding to all the pixel units in the corresponding backlight partition.
The embodiment of the application also provides a backlight brightness control device. The backlight source is used for controlling the display brightness of the display panel, the display panel comprises a plurality of display partitions, each display partition in the display partitions comprises at least one pixel unit, and the backlight intensity corresponding to each pixel unit is different; and taking any pixel unit as a target pixel unit. As shown in fig. 6, an embodiment of a backlight brightness control device according to an embodiment of the present application is shown, which may include:
the obtaining module 601 is configured to obtain target backlight setting values corresponding to the multiple display regions, so as to obtain multiple target backlight setting values.
The first calculating module 602 is configured to calculate an equivalent backlight intensity value corresponding to a target pixel unit in at least one pixel unit according to the target backlight set values.
The second calculating module 603 is configured to calculate a target energy consumption function corresponding to the target pixel unit according to the equivalent backlight intensity value.
A third calculation module 604, configured to determine a numerical value of the target backlight setting according to the target energy consumption function.
The adjusting module 605 is configured to adjust the brightness of the backlight source according to the value of the target backlight setting value.
The backlight brightness control device provided by the embodiment of the application firstly obtains target backlight set values corresponding to a plurality of display partitions in a display panel, and then determines equivalent backlight intensity values corresponding to any pixel units according to the target backlight set values; meanwhile, according to the equivalent backlight intensity value corresponding to the pixel unit, calculating to obtain the energy consumption corresponding to the pixel unit, and according to the specific numerical value of the target backlight set value corresponding to the pixel unit when the energy consumption is minimum, adjusting the backlight corresponding to the pixel unit according to the numerical value of the target backlight set value, so that the energy consumption of the display panel is minimum. The influence of all the backlight sources on the backlight brightness of the pixel units is considered, and meanwhile, the numerical value of the corresponding target backlight set value when the energy consumption is the lowest can be reversely determined according to the energy consumption, so that the brightness of the backlight sources can be adjusted according to the numerical value of the target backlight set value, and the energy consumption of the display panel can be reduced.
In some embodiments, any of the plurality of display partitions is targeted for a display partition. The acquisition module 601 may also be configured to: obtaining pixel gray scale values corresponding to all pixel units in a target display partition respectively so as to obtain a pixel gray scale value set; determining a backlight statistic value corresponding to the target display partition according to the pixel gray level value set; and determining a target backlight set value corresponding to the target display partition according to the backlight statistic value.
Wherein the pixel gray-scale value set, the backlight statistic value and the target backlight set value are all a plurality of; the target display partition corresponds to a defined set of pixel gray scale values, a defined backlight statistic and a defined target backlight setting.
In some embodiments, the acquisition module 601 may also be configured to: and determining the backlight statistic value corresponding to the target display partition by using a preset histogram cumulative distribution function.
In some embodiments, the first computing module 602 may also be configured to: acquiring a corresponding relation between a preset backlight set value and a backlight statistic value; and judging the backlight intensity range in which the backlight statistic is positioned, so as to determine a target backlight set value corresponding to the target display partition according to the backlight intensity range in which the backlight statistic is positioned.
In some embodiments, the second computing module 603 may also be configured to: calculating a compensation backlight intensity value corresponding to the target pixel unit according to the equivalent backlight intensity value; obtaining a target energy consumption function corresponding to a target pixel unit according to a preset initial energy consumption function, a compensation backlight intensity value and an equivalent backlight intensity value; and calculating the energy consumption corresponding to the target pixel unit according to the target energy consumption function.
In some embodiments, the preset initial energy consumption function includes a first energy consumption function and a second energy consumption function. The second calculation module 603 may also be configured to: obtaining a third energy consumption function corresponding to the equivalent backlight intensity value according to the first energy consumption function and the equivalent backlight intensity value; obtaining a fourth energy consumption function corresponding to the compensated backlight intensity value according to the second energy consumption function and the compensated backlight intensity value; the target energy consumption function includes a third energy consumption function and a fourth energy consumption function.
In some embodiments, the third computing module 604 may also be configured to: performing partial derivative on the target energy consumption function to obtain a partial derivative function corresponding to the target energy consumption function; and determining the numerical value of the target backlight set value corresponding to the target pixel unit according to the partial derivative function.
The value of the target backlight set value is the backlight set value corresponding to the time when the target energy consumption function is minimum.
The embodiment of the application also provides electronic equipment, which integrates any one of the backlight brightness control devices provided by the embodiment of the application. As shown in fig. 7, a schematic diagram of a server according to an embodiment of the present application is shown, specifically:
the electronic device may include one or more processing cores 'processors 701, one or more computer-readable storage media's memory 702, power supply 703, and input unit 704, among other components. It will be appreciated by those skilled in the art that the electronic device structure shown in the figures is not limiting of the electronic device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. Wherein:
the processor 701 is a control center of the electronic device, connects various parts of the entire electronic device using various interfaces and lines, and performs various functions of the electronic device and processes data by running or executing software programs and/or modules stored in the memory 702, and calling data stored in the memory 702, thereby performing overall monitoring of the electronic device. Optionally, processor 701 may include one or more processing cores; preferably, the processor 701 may integrate an application processor and a modem processor, wherein the application processor primarily handles operating systems, user interfaces, applications, etc., and the modem processor primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 701.
The memory 702 may be used to store software programs and modules, and the processor 701 executes various functional applications and data processing by executing the software programs and modules stored in the memory 702. The memory 702 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data created according to the use of the electronic device, etc. In addition, the memory 702 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 702 may also include a memory controller to provide access to the memory 702 by the processor 701.
The electronic device further comprises a power supply 703 for powering the various components, preferably the power supply 703 is logically connected to the processor 701 by a power management system, whereby the functions of managing charging, discharging, and power consumption are performed by the power management system. The power supply 703 may also include one or more of any component, such as a direct current or alternating current power supply, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, etc.
The electronic device may further comprise an input unit 704, which input unit 704 may be used for receiving input digital or character information and generating keyboard, mouse, joystick, optical or trackball signal inputs in connection with user settings and function control.
Although not shown, the electronic device may further include a display unit or the like, which is not described herein. In particular, in this embodiment, the processor 701 in the electronic device loads executable files corresponding to the processes of one or more application programs into the memory 702 according to the following instructions, and the processor 701 executes the application programs stored in the memory 702, so as to implement various functions as follows:
obtaining target backlight set values corresponding to the display partitions respectively, and obtaining a plurality of target backlight set values; calculating an equivalent backlight intensity value corresponding to a target pixel unit in at least one pixel unit according to the target backlight set values; calculating a target energy consumption function corresponding to the target pixel unit according to the equivalent backlight intensity value; determining the numerical value of the target backlight set value according to the target energy consumption function; and adjusting the brightness of the backlight source according to the numerical value of the target backlight set value.
Those of ordinary skill in the art will appreciate that all or a portion of the steps of the various methods of the above embodiments may be performed by instructions, or by instructions controlling associated hardware, which may be stored in a computer-readable storage medium and loaded and executed by a processor.
To this end, an embodiment of the present application provides a computer-readable storage medium, which may include: read Only Memory (ROM), random access Memory (RAM, random Access Memory), magnetic or optical disk, and the like. The computer program is stored thereon and loaded by the processor to perform the steps of any one of the backlight brightness control methods provided by the embodiments of the present application. For example, the loading of the computer program by the processor may perform the steps of:
obtaining target backlight set values corresponding to the display partitions respectively, and obtaining a plurality of target backlight set values; calculating an equivalent backlight intensity value corresponding to a target pixel unit in at least one pixel unit according to the target backlight set values; calculating a target energy consumption function corresponding to the target pixel unit according to the equivalent backlight intensity value; determining the numerical value of the target backlight set value according to the target energy consumption function; and adjusting the brightness of the backlight source according to the numerical value of the target backlight set value.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and the portions of one embodiment that are not described in detail in the foregoing embodiments may be referred to in the foregoing detailed description of other embodiments, which are not described herein again.
In the implementation, each unit or structure may be implemented as an independent entity, or may be implemented as the same entity or several entities in any combination, and the implementation of each unit or structure may be referred to the foregoing method embodiments and will not be repeated herein.
The specific implementation of each operation above may be referred to the previous embodiments, and will not be described herein.
The above describes in detail a method, an apparatus, a server and a storage medium for controlling backlight brightness provided by the embodiments of the present application, and specific examples are applied to illustrate the principles and implementations of the present application, where the above description of the embodiments is only for helping to understand the method and core ideas of the present application; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the present description should not be construed as limiting the present application in summary.
Claims (9)
1. The backlight brightness control method is characterized in that the backlight is used for controlling the display brightness of a display panel, the display panel comprises a plurality of display partitions, each display partition comprises at least one pixel unit, and the backlight intensity corresponding to each pixel unit is different; the method comprises the following steps:
obtaining target backlight set values corresponding to the display partitions respectively, and obtaining a plurality of target backlight set values;
calculating an equivalent backlight intensity value corresponding to a target pixel unit in the at least one pixel unit according to the target backlight set values;
calculating a target energy consumption function corresponding to the target pixel unit according to the equivalent backlight intensity value;
determining the numerical value of the target backlight set value according to the target energy consumption function;
adjusting the brightness of the backlight source according to the numerical value of the target backlight set value;
and calculating a target energy consumption function corresponding to the target pixel unit according to the equivalent backlight intensity value, wherein the target energy consumption function comprises the following components:
calculating a compensation backlight intensity value corresponding to the target pixel unit according to the equivalent backlight intensity value;
and obtaining a target energy consumption function corresponding to the target pixel unit according to a preset initial energy consumption function, the compensation backlight intensity value and the equivalent backlight intensity value.
2. The backlight brightness control method according to claim 1, wherein any display partition among the plurality of display partitions is taken as a target display partition;
the obtaining the target backlight set values corresponding to the display partitions respectively to obtain a plurality of target backlight set values includes:
obtaining pixel gray scale values corresponding to all pixel units in the target display partition respectively so as to obtain a pixel gray scale value set;
determining a backlight statistic value corresponding to the target display partition according to the pixel gray-scale value set;
determining a target backlight set value corresponding to the target display partition according to the backlight statistic value;
wherein the pixel gray-scale value set, the backlight statistic and the target backlight set value are all a plurality of; the target display partition corresponds to a defined set of pixel gray scale values, a defined backlight statistic and a defined target backlight setting.
3. The method of claim 2, wherein determining the backlight statistics corresponding to the target display region according to the set of pixel gray scale values comprises:
and determining the backlight statistic value corresponding to the target display partition by using a preset histogram cumulative distribution function.
4. The method of claim 2, wherein determining a target backlight setting value corresponding to the target display partition according to the backlight statistic comprises:
acquiring a corresponding relation between a preset backlight set value and the backlight statistic value;
and judging the backlight intensity range of the backlight statistic value to determine a target backlight set value corresponding to the target display partition according to the corresponding relation.
5. The method according to claim 1, wherein the preset initial power consumption function includes a first power consumption function and a second power consumption function;
the obtaining a target energy consumption function corresponding to the target pixel unit according to a preset initial energy consumption function, the compensation backlight intensity value and the equivalent backlight intensity value comprises the following steps:
obtaining a third energy consumption function corresponding to the equivalent backlight intensity value according to the first energy consumption function and the equivalent backlight intensity value;
obtaining a fourth energy consumption function corresponding to the compensation backlight intensity value according to the second energy consumption function and the compensation backlight intensity value;
the target energy consumption function includes the third energy consumption function and the fourth energy consumption function.
6. The method of claim 5, wherein determining the magnitude of the target backlight setting value according to the target energy consumption function comprises:
performing partial derivative on the target energy consumption function to obtain a partial derivative function corresponding to the target energy consumption function;
determining the numerical value of a target backlight set value corresponding to the target pixel unit according to the partial derivative function;
the value of the target backlight set value is the backlight set value corresponding to the time when the target energy consumption function is minimum.
7. The backlight brightness control device is characterized in that the backlight is used for controlling the display brightness of a display panel, the display panel comprises a plurality of display partitions, each display partition comprises at least one pixel unit, and the backlight intensity corresponding to each pixel unit is different; the device comprises:
the acquisition module is used for acquiring target backlight set values corresponding to the display partitions respectively to obtain a plurality of target backlight set values;
the first calculation module is used for calculating an equivalent backlight intensity value corresponding to a target pixel unit in the at least one pixel unit according to the target backlight set values;
The second calculation module is used for calculating a target energy consumption function corresponding to the target pixel unit according to the equivalent backlight intensity value;
the third calculation module is used for determining the numerical value of the target backlight set value according to the target energy consumption function;
the adjusting module is used for adjusting the brightness of the backlight source according to the numerical value of the target backlight set value;
the second calculating module is configured to calculate a compensated backlight intensity value corresponding to the target pixel unit according to the equivalent backlight intensity value;
and obtaining a target energy consumption function corresponding to the target pixel unit according to a preset initial energy consumption function, the compensation backlight intensity value and the equivalent backlight intensity value.
8. A server, the server comprising:
one or more processors;
a memory; and
one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the backlight brightness control method of any one of claims 1 to 6.
9. A computer-readable storage medium, having stored thereon a computer program, the computer program being loaded by a processor to perform the steps in the backlight brightness control method of any one of claims 1 to 6.
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