CN112700746B - Brightness adjusting method of display device, terminal device and storage medium - Google Patents
Brightness adjusting method of display device, terminal device and storage medium Download PDFInfo
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- CN112700746B CN112700746B CN202011644530.1A CN202011644530A CN112700746B CN 112700746 B CN112700746 B CN 112700746B CN 202011644530 A CN202011644530 A CN 202011644530A CN 112700746 B CN112700746 B CN 112700746B
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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Abstract
The invention discloses a brightness adjusting method of display equipment, which comprises the following steps: under each reference gray scale value, acquiring the actual primary color brightness of each display light source in the display equipment; acquiring the average primary color brightness of a display screen of the display equipment under the target gray scale value; determining the target primary color brightness of each gray level value according to the average primary color brightness and the target gray level value; under each gray scale value, determining a mapping gray scale value of each display light source according to the actual primary color brightness, the reference gray scale value and the target primary color brightness of each display light source at each reference gray scale value; and acquiring a display gray scale value of the display screen, and correcting each display light source according to a mapping gray scale value corresponding to the display gray scale value of each display light source, so that each display light source is lightened according to the target primary color brightness corresponding to the display gray scale value, wherein the gray scale value comprises the display gray scale value. The invention also provides a display device and a readable storage medium. The method of the invention improves the brightness display uniformity of the display screen.
Description
Technical Field
The present invention relates to the field of display screen technologies, and in particular, to a brightness adjustment method for a display device, and a storage medium.
Background
In recent years, the LED display screen has been widely used in areas such as urban transportation junction stations and commercial buildings due to its characteristics of high brightness, bright color, good visibility, large size, etc. Due to the limitation of factors such as LED production process, materials, technology and cost, the produced LED lamp has certain brightness difference, the LED lamp is particularly obvious for LED lamps of different production batches, and a display screen formed by splicing LEDs has the phenomenon of uneven brightness and the like, so that the display effect of the LED screen is influenced.
The above is only for the purpose of assisting understanding of the technical solution of the present invention, and does not represent an admission that the above is the prior art.
Disclosure of Invention
The invention mainly aims to provide a brightness adjusting method of a display device, the display device and a readable storage medium, and aims to solve the problem that the display effect of the display screen is influenced due to uneven brightness display of the display screen.
In order to achieve the above object, the present invention provides a brightness adjusting method for a display device, the brightness adjusting method for a display pen comprising:
acquiring the actual primary color brightness of each display light source in the display equipment under each reference gray scale value;
acquiring the average primary color brightness of a display screen of the display equipment under the target gray scale value;
determining target primary color brightness under each gray scale value according to the average primary color brightness and the target gray scale value;
under each gray scale value, determining a mapping gray scale value of each display light source according to the actual primary color brightness, the reference gray scale value and the target primary color brightness of each display light source under each reference gray scale value;
and acquiring a display gray scale value of the display screen, and correcting each display light source according to the mapping gray scale value of each display light source corresponding to the display gray scale value so as to enable each display light source to be lightened according to the target primary color brightness corresponding to the display gray scale value, wherein the gray scale value comprises the display gray scale value.
Optionally, the step of obtaining the average primary color brightness of the display screen of the display device under the target gray-scale value includes:
acquiring the average primary color brightness of the display screen of the display equipment in each display sub-area under the target gray scale value;
the step of determining the target primary color brightness under each gray scale value according to the average primary color brightness and the target gray scale value comprises:
acquiring the minimum average primary color brightness in the average primary color brightness of each display sub-region;
and determining the target primary color brightness under each gray-scale value according to the minimum average primary color brightness and the target gray-scale value.
Optionally, the step of determining the target primary color brightness at each gray level according to the minimum average primary color brightness and the target gray level includes:
acquiring a primary color brightness interval value of the display sub-area corresponding to the minimum average primary color brightness;
determining a brightness correction coefficient according to the primary color brightness interval value;
determining the target primary color brightness under the target gray-scale value according to the minimum average primary color brightness and the brightness correction coefficient;
and determining the target primary color brightness of each gray scale value according to the target gray scale value and the target primary color brightness.
Optionally, the step of determining the target primary color brightness at each gray level according to the average primary color brightness and the target gray level includes:
acquiring a primary color brightness interval value of the display equipment;
determining a brightness correction coefficient according to the primary color brightness interval value;
determining the target primary color brightness under the target gray scale value according to the average primary color brightness and the brightness correction coefficient;
and determining the target primary color brightness of each gray-scale value according to the target primary color brightness and the target gray-scale value.
Optionally, the step of determining the target primary color brightness of each gray level value according to the target primary color brightness and the target gray level value includes:
generating a first brightness gray scale mapping line according to the target primary color brightness and the target gray scale value;
and determining the target primary color brightness of each gray scale value according to the first brightness gray scale mapping line.
Optionally, the step of determining, at each of the gray scale values, a mapping gray scale value of each of the display light sources according to the actual primary color brightness, the reference gray scale value and the target primary color brightness of each of the display light sources at each of the reference gray scale values includes:
generating a second brightness gray scale mapping line of each display light source according to the actual primary color brightness of each display light source at each reference gray scale value and the reference gray scale value;
and under each gray scale value, determining the mapping gray scale value of each display light source according to the second brightness gray scale mapping line of each display light source and the target primary color brightness of the display light source at each gray scale value.
Optionally, before the step of correcting each display light source according to the mapping gray-scale value corresponding to the display gray-scale value of each display light source so that each display light source is lit according to the brightness of the target primary color corresponding to the display gray-scale value, the method includes:
writing mapping gray-scale values corresponding to the target primary color brightness of each gray-scale value of each display light source into the display equipment;
the step of correcting each display light source according to the mapping gray scale value corresponding to the display gray scale value of each display light source comprises:
acquiring the mapping gray scale value corresponding to the display gray scale value of each display light source;
correcting the display light source according to the mapping gray scale value corresponding to the display gray scale value
Optionally, the step of generating a first luminance grayscale mapping line according to the target grayscale value and the target primary luminance includes:
and generating the first brightness gray scale linear mapping line according to the target gray scale value, the target primary color brightness and the preset parameters.
Further, to achieve the above object, the present invention also provides a display apparatus comprising: a memory, a processor and a brightness adjustment program of a display device stored in the memory and operable on the processor, the brightness adjustment program of the display device implementing the steps of the brightness adjustment method of the display device as described above when executed by the processor.
Further, to achieve the above object, the present invention also provides a readable storage medium storing a luminance adjustment program of a display device, which when executed by the processor, implements the respective steps of the luminance adjustment method of the display device as described above.
The invention provides a brightness adjusting method of a display device, which comprises the steps of determining the average primary color brightness of a display screen of the display device under a target gray scale value, determining the target primary color brightness corresponding to the display screen under each gray scale value according to the target gray scale value and the average primary color brightness under the target gray scale value, and in order to ensure that each display light source on the display screen can be displayed under the same gray scale value by the target primary color brightness, determining the mapping gray scale value corresponding to the target primary color brightness of each display light source under each gray scale value through each reference gray scale value, the obtained actual primary color brightness of each display light source under each reference gray scale value and the target primary color brightness required to be reached by the display light source, namely, when the display gray scale value of the display screen is the first gray scale value, in order to enable each display light source in the display screen to be lightened by the target primary color brightness corresponding to the first gray scale value, the first gray scale value corresponding to the display brightness of each display light source under the first gray scale value is obtained, and the uniformity of each display light source is further improved by correcting the first display gray scale value corresponding to the gray scale value of each display light source under the first gray scale value.
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Fig. 1 is a block diagram of a display device according to various embodiments of a brightness adjustment method for a display device according to the present invention;
FIG. 2 is a flowchart illustrating a brightness adjustment method for a display device according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the luminance of a primary color corresponding to a display screen of the luminance adjustment method of a display device according to the present invention under a reference gray scale value;
FIG. 4 is a reference diagram illustrating a first embodiment of a brightness adjustment method for a display device according to the present invention for determining brightness of a target primary color at each gray level;
FIG. 5 is a flowchart illustrating a brightness adjustment method for a display device according to a second embodiment of the present invention;
FIG. 6 is a flowchart illustrating a brightness adjustment method for a display device according to a third embodiment of the present invention;
FIG. 7 is a flowchart illustrating a brightness adjustment method for a display device according to a fourth embodiment of the present invention;
FIG. 8 is a reference diagram illustrating the generation of a second luminance grayscale map line for each of the display light sources;
FIG. 9 is a reference schematic diagram illustrating the determination of a mapped gray scale value for each display light source;
fig. 10 is a flowchart illustrating a fifth embodiment of a brightness adjustment method for a display device according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "part", or "unit" used to indicate elements are used only for facilitating the description of the present invention, and have no particular meaning in themselves. Thus, "module", "component" or "unit" may be used mixedly.
The display device is a terminal device with a display screen, wherein the terminal device with the display screen may include terminals such as a mobile phone, a tablet computer, a notebook computer, a palm top computer, a Personal Digital Assistant (PDA), and a Portable Media Player (PMP).
It will be appreciated by those skilled in the art that the construction according to an embodiment of the invention can also be applied to fixed type terminal devices with display screens, such as display screens applied to areas of urban transportation terminal stations, commercial buildings, etc., in addition to elements used specifically for mobile purposes.
Referring to fig. 1, fig. 1 is a block diagram of a display device according to various embodiments of a brightness adjustment method of the display device of the present invention, where the display device may include: memory 101, processor 102, and display unit 103. It will be understood by those skilled in the art that the block diagram of the display device shown in fig. 1 does not constitute a limitation of the display device, and that the display device may include more or less components than those shown, or some components may be combined, or a different arrangement of components.
The memory 101 stores therein an operating system and a brightness adjustment program for the display device. The processor 102 is a control center of the display device, and the processor 102 executes the brightness adjustment program of the display device stored in the memory 101 to implement the steps of the brightness adjustment method embodiments of the display device of the present invention. The Display unit 103 includes a Display panel, which may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like, for displaying an image. Alternatively, the display unit 103 may be integrated with a touch panel, and when the touch panel detects a touch operation of a finger thereon or nearby, the touch panel transmits the touch operation to the processor 102 to determine the type of the touch event, and then the processor 102 correspondingly implements a function according to the type of the touch event.
Based on the structural block diagram of the display device, various embodiments of the brightness adjusting method of the display device of the present invention are proposed.
Referring to fig. 2, fig. 2 is a flowchart illustrating a brightness adjustment method of a display device according to a first embodiment of the present invention. In this embodiment, the brightness adjustment method of the display device includes the steps of:
step S10, acquiring the actual primary color brightness of each display light source in the display equipment under each reference gray scale value;
it should be noted that, in the practical application process, due to the difference of each display light source such as an LED lamp in the display screen, even if the display screen is based on the same gray scale value, the brightness of each display light source on the display screen is not all the same, which causes the uneven display brightness when the display screen is lighted, and especially, for the display screens of different production batches, due to the limitation of factors such as the production process, materials, technology and cost of the display screen, the produced display light sources have a certain brightness difference, and the display screen spliced by the display light sources has the uneven brightness, which affects the display effect of the display screen.
The gray scale value is used to represent the brightness of the brightness, and the number of the gray scale value is generally 256, which is 0 to 255. The gray scale values include reference gray scale values, and the reference gray scale values are gray scale values used for obtaining the actual primary color brightness of each display light source in the display device, wherein the number of the reference gray scale values is at least three gray scale values in the gray scale values, and the reference gray scale values may be preset, for example, gray scales with gray scale values of 64, 128, and 255 may be selected as the reference gray scale values.
It should be noted that each pixel point on the display screen is composed of three color points of red, green and blue, each pixel point on the display screen corresponds to each display light source, and the actual primary color brightness of each display light source in the display device is obtained, which can be understood as obtaining the actual primary color brightness of each pixel point in the display device, where each pixel point corresponds to three color points of red, green and blue, and the actual primary color brightness of each pixel point includes red primary color brightness, green primary color brightness and blue primary color brightness. Referring to fig. 3, fig. 3 is a schematic diagram of primary color luminance corresponding to a reference gray scale value of a display screen of a luminance adjustment method of a display device of the present invention, which can be used to illustrate that when the display screen is divided into a plurality of display sub-regions, the primary color luminance corresponding to each reference gray scale value of one of the display sub-regions is extracted, where d is the display screen, a/b/c is respectively used to represent a red channel, a green channel, and a blue channel corresponding to the same display sub-region in the display screen, and R1/R2/R3 respectively represent different reference gray scale values.
The actual primary color brightness of each pixel point in the display screen can be acquired by setting a camera at each reference gray scale value, wherein the actual primary color brightness of each pixel point can also be acquired by an imaging luminance meter, an industrial camera or a brightness sensor, and the like, which is not limited in this embodiment.
Step S20, obtaining the average primary color brightness of a display screen of the display equipment under the target gray scale value;
the target gray scale value may be any one of gray scale values 0 to 255, or may be any one of reference gray scale values, and the determination of the target gray scale value may be set in advance.
Under the condition of obtaining the target gray scale value, the average primary color brightness of the display screen of the display equipment can be determined according to the actual primary color brightness of each pixel point and the total number of the pixel points of the display screen on the basis of obtaining the actual primary color brightness of each pixel point in the display screen, for example, the actual primary color brightness of each pixel point is summed to obtain the actual primary color total brightness of all the pixel points, then the ratio of the actual primary color total brightness to the total number of the pixel points is obtained, and the ratio is used as the average primary color brightness of the display screen; the average primary color brightness of the display screen may also be obtained by directly detecting the whole display screen through the primary color brightness detection device, which is not limited in this embodiment.
It is to be understood that the corresponding actual primary luminances include a red primary luminance, a green primary luminance, and a blue primary luminance, and the average primary luminance includes a red average primary luminance, a green average primary luminance, and a blue average primary luminance.
Step S30, determining target primary color brightness under each gray-scale value according to the average primary color brightness and the target gray-scale value;
in an actual application process, before determining the target primary color brightness at each gray scale value, gamma and white balance calibration may be performed on the display device, so that the Gamma calibration is in a linear state or a non-linear state.
Determining target primary color brightness under each gray scale value according to the average primary color brightness and the target gray scale value, determining target primary color brightness under each gray scale value according to the average primary color brightness, a brightness correction coefficient and the target gray scale value, wherein the brightness correction coefficient can be used for correcting the average primary color brightness of the display screen under the target gray scale value to obtain the target primary color brightness of the display screen under the target gray scale value, determining the target primary color brightness corresponding to the display screen under the target gray scale value, and calculating the target primary color brightness of the display screen under each gray scale value based on the fact that the gray scale value and the primary color brightness are calibrated into a linear state through Gamma, as can refer to fig. 4, fig. 4 is a reference schematic diagram for determining the target primary color brightness under each gray scale value in the first embodiment of the brightness adjustment method of the display device of the present invention, L3_ a is the average primary color brightness corresponding to the target gray scale value, and L3_ t is the target primary color brightness corresponding to the target gray scale value.
It should be noted that the brightness correction coefficient is set to determine the average primary color brightness of the display screen at the target gray scale value based on the total primary color brightness of all the pixels in the display screen and the total number of the pixels, and under the same target gray scale value, because of the difference of the original display light sources corresponding to each pixel, the brightness displayed by the display light sources corresponding to each pixel is not uniform, that is, based on the reference brightness at the target gray scale value, the actual brightness of some display light sources at the target gray scale value is greater than the reference brightness, and the actual brightness of some display light sources at the target gray scale value is less than or equal to the reference brightness, in order to avoid that the brightness of the target primary color corresponding to the target gray scale value is too high, and the brightness of the entire display screen cannot be uniformly displayed due to the limitation of the displayed brightness caused by the difference of the display light sources of the display screen portion, after the average primary color brightness is corrected by setting the brightness correction coefficient, the target primary color brightness of the display screen at the target gray scale value is determined, it can be understood that the correction coefficient is greater than zero and less than 1, and the brightness of the correction coefficient can be determined by the target gray scale value of the display brightness of each display screen at the target gray scale value.
Step S40, under each gray scale value, determining a mapping gray scale value of each display light source according to the actual primary color brightness, the reference gray scale value and the target primary color brightness of each display light source under each reference gray scale value;
determining a mapping gray-scale value of each display light source under each gray-scale value according to the actual primary color brightness, the reference gray-scale value and the target primary color brightness of each display light source under each reference gray-scale value, and generating a second brightness gray-scale mapping ray of each display light source according to the actual primary color brightness and the reference gray-scale value of each display light source under each reference gray-scale value; and determining the mapping gray scale value of each display light source according to the second brightness gray scale mapping line of each display light source and the target primary color brightness of the display light source at each gray scale value.
Further, the mapping gray scale value of each display light source is determined according to the second brightness gray scale mapping line of each display light source and the target primary color brightness of the display light source at each gray scale value, which may be determining the target primary color brightness corresponding to the display light source at the reference gray scale value from the target primary color brightness of the display light source at each gray scale value, determining the mapping gray scale value corresponding to each display light source at the reference gray scale value according to the second brightness gray scale mapping line of each display light source and the target primary color brightness corresponding to the display light source at the reference gray scale value, and indirectly determining the mapping gray scale value of each display light source at each gray scale value according to the mapping gray scale value of each display light source at the reference gray scale value and the reference gray scale value.
And S50, acquiring a display gray scale value of the display screen, and correcting each display light source according to the mapping gray scale value of each display light source corresponding to the display gray scale value so as to enable each display light source to be lightened according to the target primary color brightness corresponding to the display gray scale value, wherein the gray scale value comprises the display gray scale value.
Based on the fact that the display light source corresponding to each pixel point on the display screen displays uneven brightness due to the difference of the display light source corresponding to each pixel point originally under the same gray scale value, the obtained mapping gray scale value of each display light source on the display screen under each gray scale value can be obtained.
In the technical scheme disclosed in this embodiment, by determining the average primary color brightness of the display screen of the display device at the target gray-scale value, and determining the target primary color brightness corresponding to the display screen at each gray-scale value according to the target gray-scale value and the average primary color brightness at the target gray-scale value, in order to ensure that each display light source on the display screen can be displayed at the target primary color brightness at the same gray-scale value, it is determined that each display light source is required to reach the mapped gray-scale value corresponding to the target primary color brightness at each gray-scale value by using each reference gray-scale value, that is, when the display gray-scale value of the display screen is the first gray-scale value, in order to make each display light source in the display screen light at the target primary color brightness corresponding to the first gray-scale value, the mapped gray-scale value corresponding to the first gray-scale value of each display light source in the display screen is obtained, and the brightness of each display light source at the first gray-scale value corresponding to the first gray-scale value is corrected, so that the brightness of each display light source at the target gray-scale value corresponding to the gray-scale value is displayed at the gray-scale value, the gray-scale value of each display light source is displayed at the first gray-scale value, the uniformity of the display screen is improved.
Referring to fig. 5, fig. 5 is a flowchart illustrating a brightness adjustment method of a display device according to a second embodiment of the present invention. In this embodiment, the step S20 obtains the average primary color brightness of the display screen of the display device under the target gray scale value, and includes:
step S21, obtaining the average primary color brightness of the display screen of the display device in each display sub-area under the target gray scale value;
in the practical application process, the large display screen applied to the areas such as the urban transportation terminal, the commercial building and the like is often formed by splicing a plurality of display sub-screens, and it can be understood that when the plurality of display sub-screens are not display screens produced in the same batch, due to the limitation of the production process, materials, technology, cost and other factors of the display sub-screens, a certain luminance and chrominance difference exists between different produced display sub-screens, and in addition, even if the display sub-screens produced in the same production batch, due to the difference between the display light sources corresponding to the pixels on the display sub-screens, a certain luminance and chrominance difference may also exist between the display light sources on the display sub-screens, compared with the average luminance of the whole display screen of the display device in the first embodiment, the display screen may be divided into a plurality of display sub-areas in this embodiment, where the display sub-areas may be display sub-screens forming the display screens, or may be unit areas of the preset divided display screens, and are not limited thereto.
Under the condition of obtaining the target gray-scale value, the average primary color brightness of the display screen of the display device in each display sub-region can be determined according to the actual primary color total brightness of each display sub-region and the total number of pixel points in each display sub-region on the basis of obtaining the actual primary color total brightness of all pixel points in each display sub-region in the display screen and the total number of pixel points in each display sub-region. Alternatively, when the display sub-regions are display sub-screens, the primary color brightness detection device may directly detect each display sub-region to obtain the average primary color brightness of each display sub-region. Optionally, the target gray level value may be the highest gray level value, i.e., 255. Step S30, determining the target primary color brightness at each gray level according to the average primary color brightness and the target gray level includes:
step S31, obtaining the minimum average primary color brightness in the average primary color brightness of each display subarea;
and step S32, determining the target primary color brightness under each gray scale value according to the minimum average primary color brightness and the target gray scale value.
In this embodiment, the purpose of dividing the display screen into a plurality of display sub-regions is to obtain the average primary color luminance of each display sub-region in the display screen by subdividing the entire display screen, so as to determine the minimum average primary color luminance in each display sub-region in the entire display screen, that is, to ensure that the luminance displayed by the entire display screen is uniform, the minimum average primary color luminance of each display sub-region in the entire display screen is determined, so as to more accurately evaluate the luminance reference of the entire display screen, the minimum average primary color luminance is used as the reference primary color luminance of the entire display screen, and the target primary color luminance of the entire display screen under the target gray level value is determined according to the reference primary color luminance.
On the basis of obtaining the average primary color brightness of each display sub-area, the minimum average primary color brightness in the average primary color brightness of each display sub-area can be directly obtained, and the target primary color brightness under each gray level value is determined according to the minimum average primary color brightness and the target gray level value.
As an optional implementation manner, the step S32 of determining the target primary color brightness at each gray-scale value according to the minimum average primary color brightness and the target gray-scale value includes:
acquiring a primary color brightness interval value of the display sub-area corresponding to the minimum average primary color brightness;
determining a brightness correction coefficient according to the primary color brightness interval value;
determining the target primary color brightness under the target gray-scale value according to the minimum average primary color brightness and the brightness correction coefficient;
and determining the target primary color brightness of each gray scale value according to the target gray scale value and the target primary color brightness.
It should be noted that the minimum average primary color luminance may be used as a luminance reference for evaluating the entire display screen, and the target primary color luminance at the target gray scale value is determined according to the luminance reference, that is, the minimum average primary color luminance, so that the display light sources corresponding to the pixel points in the display screen may be lit at the target gray scale value with the target primary color luminance, the luminance displayed by the entire display screen is uniform, and the display effect of the display screen is improved.
In addition, the brightness correction coefficient is set to determine the average primary color brightness of the display screen at the target gray-scale value based on the total primary color brightness of all the pixel points in the display screen and the total number of the pixel points, and under the same target gray-scale value, due to the difference of the display light sources corresponding to the original pixel points, the brightness displayed by the display light sources corresponding to the pixel points is not uniform, that is, based on the reference brightness under the target gray-scale value, the actual brightness of some display light sources under the target gray-scale value is greater than the reference brightness, and the actual brightness of some display light sources under the target gray-scale value is less than or equal to the reference brightness, in order to avoid the problem that the brightness of the target primary color corresponding to the target gray-scale value is too high, and the brightness of the entire display screen cannot be uniformly displayed due to the limitation of the brightness caused by the difference of the display light sources of the display screen portion, after the brightness correction coefficient is set to correct the average primary color brightness, the brightness correction coefficient is set to determine the target primary color brightness corresponding to the target gray-scale value, it can be understood that the brightness correction coefficient can be a coefficient greater than zero and less than 1, and the brightness correction coefficient can be determined by the brightness of the target gray-scale value of each display interval of the target gray-scale value.
For the convenience of understanding of this embodiment, it is assumed that the display screen d is divided into 4 display sub-areas, the selected reference gray-scale values R1/R2/R3 are 64, 128 and 255 respectively, and the determined target gray-scale value is 255. It should be noted that, calibration such as Gamma and white balance may be performed on the display screen first, so that the Gamma calibration is in a linear state.
Corresponding to the step S21, obtaining average primary color brightness of the display screen of the display device in each display sub-region under the target gray scale value;
the average primary color brightness of the 4 display sub-regions R/G/B of the display screen under the target gray-scale value 255 is obtained, that is, the average primary color brightness of the 4 display sub-regions R (red channel) under the target gray-scale value 255 is obtained, the average primary color brightness of the 4 display sub-regions G (green channel) under the target gray-scale value 255 is obtained, and the average primary color brightness of the 4 display sub-regions B (blue channel) under the target gray-scale value 255 is obtained, for convenience of description, the average primary color brightness of the 4 display sub-regions R (red channel) under the target gray-scale value 255 is obtained as a specific example, and the target primary color brightness of each gray-scale value is determined according to the average primary color brightness and the target gray-scale value in the description step S30.
Corresponding to step S31, obtaining a minimum average primary color luminance among the average primary color luminances of the respective display sub-regions;
based on the average primary color brightness of the 4 display sub-regions R (red channels) under the target gray-scale value 255, the minimum average primary color brightness among the average primary color brightness of the 4 display sub-regions is obtained, and it is assumed that the display sub-region corresponding to the minimum average primary color brightness obtained by comparing the average primary color brightness of the 4 display sub-regions is the region where the box 1 in the display screen is located.
Corresponding to step S32, the target primary color luminance at each gray level is determined according to the minimum average primary color luminance and the target gray level.
And determining each gray level value, namely target primary color brightness of 0-255 according to the minimum average primary color brightness of the area of the box body 1 in the display screen and the target gray level value 255. Specifically, referring to fig. 4, L3_ a is an average primary color luminance corresponding to the target gray scale value, L3_ t is a target primary color luminance corresponding to the target gray scale value, the target primary color luminance at the target gray scale value is determined according to the average primary color luminance at the target gray scale value, the target primary color luminance at the target gray scale value can be determined according to the minimum average primary color luminance and the luminance correction coefficient, and a value obtained by multiplying the minimum average primary color luminance by the luminance correction coefficient is used as the target primary color luminance. The brightness correction coefficient is used for correcting the average primary color brightness of the display screen at the target gray-scale value to obtain the target primary color brightness of the display screen at the target gray-scale value, and optionally, the brightness correction coefficient takes a value of 0.85. Further, the target primary color brightness under the target gray scale value is determined according to the average primary color brightness of the target gray scale value, and a linear mapping line between the gray scale value and the target primary color brightness corresponding to the gray scale value is generated to determine the target primary color brightness under each gray scale value, so that the target primary color brightness of the display screen d under each gray scale value under R (red channel) is actually obtained.
Similarly, the specific implementation process is the same for obtaining the average primary color brightness of the 4 display sub-regions R (red channels) at the target gray-scale value 255, and the target primary color brightness of the display screen d at each gray-scale value of G (green channels) or B (blue channels) is further obtained based on obtaining the average primary color brightness of the 4 display sub-regions G (green channels) or B (blue channels) at the target gray-scale value 255, which is not limited in this implementation.
It can be understood that, no matter the display screen is in the R (red channel), the G (green channel), or the B (blue channel), under the same gray scale value, the display screen has a unique target primary color brightness, that is, the R (red channel), the G (green channel), and the B (blue channel) have unique target primary color brightness respectively, and the target primary color brightness is finally determined by the display screen under the gray scale value, so that each display light source of the display screen is lit up by the target primary color brightness corresponding to the gray scale value under the gray scale value, and the display uniformity of the display screen brightness is improved.
Compared with the first embodiment, in the technical scheme disclosed in this embodiment, the display screen is divided into a plurality of display sub-regions to subdivide the whole display screen, the average primary color brightness of each display sub-region in the display screen is obtained to determine the minimum average primary color brightness of each display sub-region in the whole display screen, the brightness reference of the whole display screen is more accurately evaluated through the minimum average primary color brightness, the target primary color brightness of the whole display screen under the target gray-scale value is determined through the minimum average primary color brightness, the target primary color brightness of the display screen under each gray-scale value can be conveniently determined by adapting to the brightness reference of the whole display screen, the purpose of improving the brightness uniformity of the whole display screen is achieved, the target primary color brightness under the target gray-scale value is determined according to the minimum average primary color brightness and the brightness correction coefficient, the limitation of the displayed brightness caused by the self-difference of the display light source of the display screen part can be avoided, the purpose of making the brightness display of the whole display screen uniform can be achieved, the target primary color brightness can be more accurately determined by setting the brightness correction coefficient to correct the average primary color brightness, and the target gray-scale value of the display screen is more accurately determined.
Referring to fig. 6, fig. 6 is a flowchart illustrating a brightness adjustment method for a display device according to a third embodiment of the present invention. In this embodiment, the step S30 of determining the target primary color brightness at each gray level according to the average primary color brightness and the target gray level includes:
step S33, obtaining a primary color brightness interval value of the display device;
step S34, determining a brightness correction coefficient according to the primary color brightness interval value;
step S35, determining the target primary color brightness under the target gray scale value according to the average primary color brightness and the brightness correction coefficient;
and step S36, determining the target primary color brightness of each gray-scale value according to the target primary color brightness and the target gray-scale value.
The primary color brightness interval value refers to a brightness value corresponding to a brightness interval determined by the primary color brightness of the display light source corresponding to each pixel point in the display device, and it can be understood that the lower limit value of the primary color brightness interval value is the minimum primary color brightness of the display light source corresponding to the pixel point in the display device, and the upper limit value of the primary color brightness interval value is the maximum primary color brightness of the display light source corresponding to the pixel point in the display device.
Determining a brightness correction coefficient according to the primary color brightness interval value, wherein the corresponding relation between the primary color interval value and the brightness correction coefficient can be preset and can be represented by a relational expression between the primary color interval value and the brightness correction coefficient, and the one-to-one corresponding relation between the primary color interval value and the brightness correction coefficient can also be directly set; the difference between the upper limit and the lower limit of the primary color brightness interval value may also be obtained, and the brightness correction coefficient is determined according to the difference, which is not limited in this embodiment.
Determining target primary color brightness under a target gray-scale value according to the average primary color brightness and a brightness correction coefficient, determining target primary color brightness of each gray-scale value according to the target primary color brightness and the target gray-scale value, wherein the brightness correction coefficient can be used for correcting the average primary color brightness of a display screen under the target gray-scale value to obtain the target primary color brightness of the display screen under the target gray-scale value, determining the target primary color brightness corresponding to the display screen under the target gray-scale value, and calculating the target primary color brightness of the display screen under each gray-scale value based on the fact that the gray-scale value and the primary color brightness are calibrated into a linear state through Gamma.
As an alternative embodiment, the step S36 of determining the target primary luminance of each of the gray-scale values according to the target primary luminance and the target gray-scale value includes:
generating a first brightness gray scale mapping line according to the target primary color brightness and the target gray scale value;
and determining the target primary color brightness of each gray scale value according to the first brightness gray scale mapping line.
Referring to fig. 4, G3 is a target gray scale value, L3_ a is an average primary color luminance corresponding to the target gray scale value, and L3_ t is a target primary color luminance corresponding to the target gray scale value. Based on the fact that the Gamma correction is in a linear state, a first brightness gray scale mapping line generated according to the brightness of the target primary color and the target gray scale value is in a linear function relationship, and optionally, the slope of the first brightness gray scale mapping line is 1. On the basis of determining the first brightness gray scale mapping line, namely knowing the gray scale value and the primary color brightness, the target primary color brightness of each gray scale value can be determined according to the first brightness gray scale mapping line.
Optionally, the step of generating a first luminance grayscale mapping line according to the target primary luminance and the target grayscale value includes: and generating a first brightness gray scale mapping line according to the target gray scale value, the target primary color brightness and the preset parameter. The preset parameter may be understood as a slope of the first luminance gray scale mapping line, and optionally, the preset parameter is 1, so as to know the target primary color luminance of the display screen at each gray scale value.
In the technical scheme disclosed in this embodiment, the target primary color brightness at the target gray-scale value is determined according to the average primary color brightness and the brightness correction coefficient, so that the problem that the brightness of the whole display screen cannot be uniformly displayed due to too high target primary color brightness corresponding to the target gray-scale value and limitation of the displayed brightness caused by self-difference of a display light source of the display screen can be avoided, the target primary color brightness corresponding to the display screen at the target gray-scale value can be more accurately determined by setting the brightness correction coefficient to correct the average primary color brightness, and the target primary color brightness of the display screen at each gray-scale value can be more accurately determined.
Referring to fig. 7, fig. 7 is a flowchart illustrating a fourth embodiment of a brightness adjustment method for a display device according to the present invention. In this embodiment, the step S40 of determining, at each of the gray scale values, a mapping gray scale value of each of the display light sources according to the actual primary color luminance, the reference gray scale value and the target primary color luminance of each of the display light sources at each of the reference gray scale values includes:
step S41, generating a second brightness gray scale mapping line of each display light source according to the actual primary color brightness of each display light source at each reference gray scale value and the reference gray scale value;
step S42, under each gray scale value, determining a mapping gray scale value of each display light source according to the second brightness gray scale mapping line of each display light source and the target primary color brightness of the display light source at each gray scale value.
The second brightness gray scale mapping line of each display light source is generated by the actual primary color brightness of each reference gray scale value of each display light source and the reference gray scale value, so that the actual corresponding relation between each gray scale value of each display light source on the display screen and the brightness of the gray scale value is fed back really through the second brightness gray scale mapping line. It should be noted that, the larger the number of values obtained by referring to the gray scale values is, the more accurate the actual corresponding relationship between each gray scale value of each display light source and the brightness of the gray scale value is. Referring to fig. 8, fig. 8 is a schematic reference diagram illustrating the generation of the second luminance grayscale map of each of the display light sources. Wherein, L1/L2/L3 in the figure can be regarded as the corresponding actual primary color brightness value under the different gray scale values of each LED lamp.
And determining the mapping gray scale value of each display light source according to the second brightness gray scale mapping line of each display light source and the target primary color brightness of the display light source at each gray scale value under each gray scale value, and in fact, on the basis of generating the second brightness gray scale mapping line of each display light source based on fig. 8, deducing the corresponding actual mapping gray scale value when the actual brightness of the display light source is the target primary color brightness by adopting an interpolation mode for the target primary color brightness of each gray scale value, thereby determining the corresponding relation among the gray scale value of each display light source, the target primary color brightness and the mapping gray scale value. Referring to fig. 9, fig. 9 is a reference diagram illustrating the determination of the mapping gray-scale values of each display light source, wherein L1_ t/L2_ t/L3_ t is a target luminance value corresponding to different gray-scale layers, and G1/G2/G3 are reference gray-scale values corresponding to the reference gray-scale values, and the mapping gray-scales corresponding to each reference gray-scale value of each display light source can be found by the interpolation method, which is G1_ t/G2_ t/G3_ t, respectively.
Further, the step S42 determining the mapped gray scale value of each display light source according to the second luminance gray scale mapping line of each display light source and the target primary luminance of the display light source at each gray scale value includes: determining target primary color brightness corresponding to the display light source under the reference gray scale value from the target primary color brightness of the display light source under each gray scale value, and determining a mapping gray scale value corresponding to each display light source under the reference gray scale value according to the second brightness gray scale mapping line of each display light source and the target primary color brightness corresponding to the display light source under the reference gray scale value;
and indirectly determining the mapping gray-scale value of each display light source under each gray-scale value according to the mapping gray-scale value of each display light source under the reference gray-scale value and the reference gray-scale value.
For example, the reference gray-scale values are G1/G2/G3, the mapping gray-scale values under the reference gray-scale values are A1/A2/A3, if the gray-scale values G4 different from the reference gray-scale values are determined, the region between the reference gray-scale values where G4 is located can be determined, and if G4 is a gray-scale value greater than G1 and less than G2, the mapping gray-scale value A4 corresponding to the gray-scale value G4 can be obtained through the linear relationship formed between (G1, A1) and (G2, A2). In the technical scheme disclosed in this embodiment, based on the same gray scale value, such as the current display gray scale value of the display screen, and due to the difference between the display light sources corresponding to the original pixels, the displayed brightness of the display light source corresponding to each pixel on the display screen is not uniform, and the obtained mapping gray scale value of each display light source on the display screen at each gray scale value is obtained, which can be regarded as substantially determining the corresponding relationship among the gray scale value of each display light source, the target primary color brightness and the mapping gray scale value, it can be understood that, at the same gray scale value, each display light source corrects the brightness of the display light source by using the mapping gray scale value corresponding to the gray scale value, so that each display light source is lit at the target primary color brightness corresponding to the gray scale value, the brightness of the display screen is uniform, and the display effect of the display screen is improved.
Referring to fig. 10, fig. 10 is a flowchart illustrating a fifth embodiment of a brightness adjustment method for a display device according to the present invention. In this embodiment, the step S50 of correcting each display light source according to the mapping gray-scale value corresponding to the display gray-scale value of each display light source so that each display light source is before being turned on according to the brightness of the target primary color corresponding to the display gray-scale value includes:
step S60, writing the mapping gray scale value corresponding to the target primary color brightness of each gray scale value of each display light source into the display equipment;
in step S50, the step of correcting each display light source according to the mapping gray-scale value corresponding to the display gray-scale value of each display light source includes:
step S51, acquiring the mapping gray scale value corresponding to the display gray scale value of each display light source;
and S52, correcting the display light source according to the mapping gray-scale value corresponding to the display gray-scale value.
The mapping gray scale value corresponding to the target primary color brightness of each gray scale value of each display light source is written into the display equipment, namely the corresponding relation between each gray scale value of each display light source and the mapping gray scale value of the gray scale value can be written into the display equipment, and the corresponding relation can be written into a chip which controls the lighting of the display light source corresponding to each pixel point in the display screen in the display equipment through a serial port, a network port and a local area network.
Based on the corresponding relationship between each gray scale value of each display light source in the display screen and the mapping gray scale value of the gray scale value written in the display device, in order to make the display brightness of the whole display screen uniform and improve the display effect of the display screen, the mapping gray scale value corresponding to the display gray scale value of each display light source is obtained based on the current display gray scale value of the display screen, and the display light source is corrected according to the mapping gray scale value corresponding to the display gray scale value, in essence, the mapping gray scale value of each display light source on the display screen at the display gray scale value is obtained, so that each display light source corrects the brightness of the display light source by adopting the mapping gray scale value corresponding to the display gray scale value, and each display light source is lighted by the target primary color brightness corresponding to the display gray scale value. Wherein the gray scale value comprises a display gray scale value.
In the technical scheme disclosed in this embodiment, the mapping gray-scale value corresponding to the target primary color brightness of each gray-scale value of each display light source is written into the display device, that is, the corresponding relationship between each gray-scale value of each display light source and the mapping gray-scale value of the gray-scale value can be written into the display device, so that based on the current display gray-scale value of the display screen, each display light source corrects the brightness of the display light source by using the corresponding mapping gray-scale value under the display gray-scale value, so that each display light source is lit up with the target primary color brightness corresponding to the display gray-scale value, the display brightness of the whole display screen is uniform, and the display effect of the display screen is improved.
The invention also provides a display device, which comprises a memory, a processor and a brightness adjusting program of the display device, wherein the brightness adjusting program of the display device is stored in the memory and can run on the processor, and the brightness adjusting method program of the display device realizes the steps of the brightness adjusting method of the display device when being executed by the processor.
The present invention further provides a storage medium, in which a brightness adjustment program of a display device is stored, and when being executed by a processor, the brightness adjustment program of the display device implements the steps of the brightness adjustment method of the display device in any of the above embodiments.
In the embodiments of the terminal and the storage medium provided by the present invention, all technical features of the embodiments of the brightness adjustment method for the display device are included, and the contents of expansion and explanation of the specification are substantially the same as those of the embodiments of the brightness adjustment method for the display device, and are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or system comprising the element.
The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a mobile terminal (such as a mobile phone, a computer, a server, a controlled terminal, or a network device) to execute the method of each embodiment of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.
Claims (9)
1. A brightness adjustment method of a display device, the brightness adjustment method of the display device comprising:
under each reference gray scale value, acquiring the actual primary color brightness of each display light source in the display equipment;
acquiring the average primary color brightness of a display screen of the display equipment under the target gray scale value;
acquiring a primary color brightness interval value of the display equipment;
determining a brightness correction coefficient according to the primary color brightness interval value;
determining the target primary color brightness under the target gray-scale value according to the average primary color brightness and the brightness correction coefficient;
determining the target primary color brightness of each gray level value according to the target primary color brightness and the target gray level value;
under each gray scale value, determining a mapping gray scale value of each display light source according to the actual primary color brightness, the reference gray scale value and the target primary color brightness of each display light source under each reference gray scale value;
and acquiring a display gray scale value of the display screen, and correcting each display light source according to the mapping gray scale value of each display light source corresponding to the display gray scale value so as to enable each display light source to be lightened according to the target primary color brightness corresponding to the display gray scale value, wherein the gray scale value comprises the display gray scale value.
2. The method for adjusting brightness of a display device according to claim 1, wherein the step of obtaining an average primary color brightness of a display screen of the display device at a target gray-scale value comprises:
acquiring the average primary color brightness of the display screen of the display equipment in each display sub-area under the target gray scale value;
the step of determining the target primary color brightness at each gray level value according to the average primary color brightness and the target gray level value comprises:
acquiring the minimum average primary color brightness in the average primary color brightness of each display sub-region;
and determining the target primary color brightness under each gray-scale value according to the minimum average primary color brightness and the target gray-scale value.
3. The method for adjusting brightness of a display device according to claim 2, wherein said step of determining a target primary brightness at each of said gray scale values based on said minimum average primary brightness and said target gray scale values comprises:
acquiring a primary color brightness interval value of the display sub-area corresponding to the minimum average primary color brightness;
determining a brightness correction coefficient according to the primary color brightness interval value;
determining the target primary color brightness under the target gray-scale value according to the minimum average primary color brightness and the brightness correction coefficient;
and determining the target primary color brightness of each gray scale value according to the target gray scale value and the target primary color brightness.
4. The method for adjusting brightness of a display device according to claim 1, wherein said step of determining a target primary brightness for each of said gray-scale values based on said target primary brightness and said target gray-scale values comprises:
generating a first brightness gray scale mapping line according to the target primary color brightness and the target gray scale value;
and determining the target primary color brightness of each gray scale value according to the first brightness gray scale mapping line.
5. The luminance adjustment method of a display device according to claim 1, wherein the step of determining the mapped gray-scale value of each of the display light sources at each of the gray-scale values based on the actual primary color luminance, the reference gray-scale value, and the target primary color luminance of each of the display light sources at each of the reference gray-scale values comprises:
generating a second brightness gray scale mapping line of each display light source according to the actual primary color brightness of each display light source at each reference gray scale value and the reference gray scale value;
and under each gray scale value, determining the mapping gray scale value of each display light source according to the second brightness gray scale mapping line of each display light source and the target primary color brightness of the display light source at each gray scale value.
6. The method for adjusting brightness of a display device according to claim 1, wherein the step of correcting each of the display light sources according to the mapping gray-scale value corresponding to the display gray-scale value of each of the display light sources so that each of the display light sources is illuminated according to the brightness of the target primary color corresponding to the display gray-scale value comprises:
writing mapping gray-scale values corresponding to the target primary color brightness of each gray-scale value of each display light source into the display equipment;
the step of correcting each display light source according to the mapping gray scale value corresponding to the display gray scale value of each display light source comprises:
acquiring the mapping gray-scale value corresponding to the display gray-scale value of each display light source;
and correcting the display light source according to the mapping gray-scale value corresponding to the display gray-scale value.
7. The method for adjusting brightness of a display device according to claim 4, wherein the step of generating a first brightness grayscale mapping line according to the target grayscale value and the target primary brightness comprises:
and generating the first brightness gray scale linear mapping line according to the target gray scale value, the target primary color brightness and preset parameters.
8. A display device, characterized in that the display device comprises: a memory, a processor and a brightness adjustment program for a display device stored in the memory and executable on the processor, the brightness adjustment program for a display device implementing the steps of the brightness adjustment method for a display device according to any one of claims 1 to 7 when executed by the processor.
9. A storage medium, characterized in that the storage medium has stored thereon a brightness adjustment program of a display device, which when executed by a processor implements the steps of the brightness adjustment method of the display device according to any one of claims 1 to 7.
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