CN114863886A - Display panel brightness correction method and device and display equipment - Google Patents
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- 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
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- 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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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Abstract
The application relates to a brightness correction method and device of a display panel and display equipment, wherein the method comprises the following steps: determining the initial brightness of each display partition in a display panel according to an image to be displayed, wherein the display panel comprises a plurality of display partitions; determining the average brightness of the display panel according to the initial brightness of each display partition; comparing the average brightness with the initial brightness of each display partition, and taking the display partition with the initial brightness lower than the average brightness as a target display partition; correcting the initial brightness of the target display partition to improve the display brightness of the target display partition, wherein when the initial brightness of any display partition is lower than the average brightness, the display partition is in a dark state at present, and the problem of image detail loss is solved.
Description
Technical Field
The present disclosure relates to the field of display panel technologies, and in particular, to a brightness correction method and apparatus for a display panel, and a display device.
Background
Liquid Crystal Displays (LCDs) are becoming the mainstream Display applications due to their advantages of light weight, high resolution, good color rendering, etc. However, the LCD has a problem of low image contrast. In a conventional LCD, an image is displayed with a backlight brightness controlled by controlling a transmittance of a Liquid Crystal (LC) cell, and the contrast difference of the image is mainly caused by that light is not completely blocked in a dark state. If a mini-LED (mini-light emitting diode) is used as a backlight, the problem of low image contrast can be improved. Although the display scheme is superior to a common LCD module, the resolution of the LED is lower than that of the LCD, when a dark field scene is displayed, the brightness of a dark scene area is adjusted to be very low, although the contrast is greatly improved, the details of an image are also lost, so that the display brightness is corrected, and the display effect is improved.
Disclosure of Invention
The application provides a brightness correction method and device of a display panel and display equipment, and aims to solve the problems that in the related art, display brightness is too low, image details are lost, and display effect is affected.
In a first aspect, the present application provides a brightness correction method for a display panel, the method including: determining the initial brightness of each display partition in a display panel according to an image to be displayed, wherein the display panel comprises a plurality of display partitions; determining the average brightness of the display panel according to the initial brightness of each display partition; comparing the average brightness with the initial brightness of each display partition, and taking the display partition with the initial brightness lower than the average brightness as a target display partition; and correcting the initial brightness of the target display partition, and improving the display brightness of the target display partition.
In some examples, modifying the initial brightness of the target display partition includes: and acquiring the maximum display brightness in all the display subareas, and correcting the initial brightness of the target display subarea according to the compensation coefficient and the maximum display brightness.
In some examples, determining an initial brightness for each display partition in the display panel from the image to be displayed includes: acquiring a gray scale distribution map of the image to be displayed; determining the brightness of each pixel in the display partition according to the gray scale distribution diagram; and acquiring the initial brightness of the display partition according to the brightness of each pixel in the display partition.
In some examples, obtaining the initial brightness of the display partition from the brightness of each pixel in the display partition includes: summing the brightness of each pixel in the display partition to obtain a total brightness value; and dividing the total brightness value by the number of the pixels in the display partition to obtain a brightness average value of the pixels in the display partition, and taking the brightness average value as the initial brightness of the display partition.
In some examples, obtaining the initial brightness of the display partition from the brightness of each pixel in the display partition includes: and carrying out root mean square on the brightness of all pixels in the display partition to obtain an average root brightness, and taking the average root brightness as the initial brightness of the display partition.
In some examples, after comparing the average luminance to the initial luminance for each display partition, the method further comprises: taking the display subarea with the initial brightness higher than the average brightness as a first target display subarea; and correcting the initial brightness of the first target display partition, and reducing the display brightness of the first target display partition.
In some examples, the pixel includes: red pixels, green pixels, blue pixels; or, the pixel includes: red pixels, green pixels, blue pixels, yellow pixels.
In a second aspect, the present application provides a brightness correction apparatus for a display panel; the display device comprises a determining module, a judging module and a display module, wherein the determining module is used for determining the initial brightness of each display partition in a display panel according to an image to be displayed, and the display panel comprises a plurality of display partitions; the determining module is further used for determining the average brightness of the display panel according to the initial brightness of each display partition; the comparison module is used for comparing the average brightness with the initial brightness of each display partition, and taking the display partition with the initial brightness lower than the average brightness as a target display partition; and the correction module is used for correcting the initial brightness of the target display partition and improving the display brightness of the target display partition.
In a third aspect, a display device is provided, which comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus; a memory for storing a computer program; a processor for implementing the steps of the method for correcting luminance of a display panel described in any one of the above when executing the program stored in the memory.
In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the steps of the brightness correction method for a display panel according to any one of the above.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
the brightness correction method for the display panel provided by the embodiment of the application comprises the following steps: determining the initial brightness of each display subarea in a display panel according to an image to be displayed, wherein the display panel comprises a plurality of display subareas; determining the average brightness of the display panel according to the initial brightness of each display partition; comparing the average brightness with the initial brightness of each display partition, and taking the display partition with the initial brightness lower than the average brightness as a target display partition; the initial brightness of any display partition is lower than the average brightness, the display partition is in a dark state at present, and the problem of image detail loss is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic basic flowchart of a brightness correction method of a display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic basic flowchart of a brightness correction method of a display panel according to a second embodiment of the present disclosure;
fig. 3 is a schematic diagram of a basic structure of a luminance correction apparatus of a display panel according to a third embodiment of the present application;
fig. 4 is a schematic structural diagram of a display device according to a fourth embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example one
In order to solve the problem in the related art that the display effect is affected by the brightness difference between adjacent pixel rows in the display panel and the bright and dark line phenomenon of the display panel, please refer to fig. 1, where fig. 1 is a method for correcting the brightness of the display panel provided by the embodiment of the present application, the method includes:
s101, determining the initial brightness of each display partition in a display panel according to an image to be displayed, wherein the display panel comprises a plurality of display partitions;
s102, determining the average brightness of the display panel according to the initial brightness of each display partition;
s103, comparing the average brightness with the initial brightness of each display partition, and taking the display partition with the initial brightness lower than the average brightness as a target display partition;
and S104, correcting the initial brightness of the target display partition, and improving the display brightness of the target display partition.
It should be understood that, the size and the resolution of the image to be displayed are not limited by the embodiment, meanwhile, the size and the resolution of the display panel are not limited as well, and in addition, the number of the display partitions in the display panel can be flexibly set by the relevant personnel, for example, 30 × 60 block display partitions in the display panel; for another example, there are 3200 block display partitions in the display panel. The number of pixels in each display partition is not limited and can be flexibly set by related personnel, and the number of pixels in a plurality of display partitions can be equal or unequal.
It should be understood that there is an initial brightness for each display partition within the display panel, and the initial brightness of the plurality of display partitions may be the same or different; the average brightness of the display panel can be obtained according to the initial brightness of all the display partitions, which will be described later and will not be described herein again.
The brightness correction method for the display panel provided by the embodiment comprises the following steps: determining the initial brightness of each display partition in a display panel according to an image to be displayed, wherein the display panel comprises a plurality of display partitions; determining the average brightness of the display panel according to the initial brightness of each display partition; comparing the average brightness with the initial brightness of each display partition, and taking the display partition with the initial brightness lower than the average brightness as a target display partition; the initial brightness of any display partition is lower than the average brightness, the display partition is in a dark state at present, and the problem of image detail loss is solved.
In some examples of this embodiment, modifying the initial brightness of the target display partition includes: and acquiring the maximum display brightness in all the display subareas, and correcting the initial brightness of the target display subarea according to the compensation coefficient and the maximum display brightness. Specifically, the display brightness of all the display partitions is compared to obtain the maximum display brightness Lmax, then the maximum display brightness is weighted through the compensation coefficient, the brightness obtained after weighting is added to the initial brightness of the target display brightness to obtain the corrected brightness, and further the brightness value of the target display partition is improved. The compensation coefficient can be flexibly set by related personnel, and preferably, the value range of the compensation coefficient is 0.25-0.35.
As described above, the maximum display brightness Lmax and the compensation coefficient TD in the display partition are obtained, the compensation brightness is obtained from the maximum display brightness Lmax and the compensation coefficient TD, and the compensation brightness and the initial brightness lint (n) of the target display partition are added by Lmax TD + lint (n) to obtain the corrected brightness lout (n).
In some examples of the present embodiment, determining the initial brightness of each display partition in the display panel according to the image to be displayed includes: acquiring a gray scale distribution map of the image to be displayed; displaying the brightness of each pixel in the partition according to the gray scale distribution diagram; and acquiring the initial brightness of the display partition according to the brightness of each pixel in the display partition. Specifically, after an image to be displayed is input, the color and the gray scale of the image to be displayed can be acquired, a gray scale distribution map corresponding to the image to be displayed can be acquired according to the gray scale, the gray scale corresponding to each pixel in the gray scale distribution map is used as the brightness corresponding to the pixel, the brightness corresponding to each pixel is further acquired, and the brightness of each display partition is calculated according to the brightness of each pixel; the present embodiment does not limit the method for obtaining the brightness corresponding to the pixel according to the data of the image to be displayed and the feature data, and can be flexibly set by the relevant personnel.
Bearing the above example, it is understood that the pixels therein include, but are not limited to: red light pixels, green light pixels, blue light pixels; or pixels include, but are not limited to: red light pixels, green light pixels, blue light pixels, white light pixels; or pixels include, but are not limited to: red pixels, green pixels, blue pixels, yellow pixels.
In some examples of this embodiment, obtaining the initial luminance of the display section from the luminance of each pixel in the display section includes: summing the brightness of each pixel in the display partition to obtain a total brightness value; and dividing the total brightness value by the number of the pixels in the display partition to obtain a brightness average value of the pixels in the display partition, and taking the brightness average value as the initial brightness of the display partition. Specifically, for example, m pixels exist in a certain display section of the display panel, the luminance of each pixel is acquired S1, S2, S3 … Sm, the luminance of each pixel is added to S1+ S2+ S3 … + Sm to obtain a total luminance value, then the total luminance value is divided by m to obtain a luminance average value, and the luminance average value is taken as the initial luminance of the display section.
In some examples of this embodiment, obtaining the initial luminance of the display section from the luminance of each pixel in the display section includes: and carrying out root mean square on all pixels in the display partition to obtain an average root brightness, and taking the average root brightness as the initial brightness of the display partition. Specifically, for example, m pixels exist in a certain display section of the display panel, the luminance S1, S2, S3 … Sm of each pixel is obtained, then (S1 × S1+ S2 × S2+ S3 × S3 … + Sm)/m is calculated and then the root luminance is obtained, and the root luminance is used as the initial luminance of the display section.
It should be appreciated that in some examples, after comparing the average luminance to the initial luminance for each display partition, the method further comprises: taking the display subarea with the initial brightness higher than the average brightness as a first target display subarea; correcting the initial brightness of the first target display partition, and reducing the display brightness of the first target display partition; it should be understood that if the initial brightness of a certain display partition is too high, there is also a problem of losing image details, and therefore, the problem of losing image details due to too high initial brightness can be avoided by reducing the brightness of the display partition with too high initial brightness.
In some examples, when a gray-scale distribution map of an image to be displayed is obtained, feature data corresponding to the image to be displayed can be calculated, where the feature data includes: and the gray-scale histogram can directly obtain the number corresponding to each brightness according to the gray-scale histogram, and further can more directly and quickly obtain the average brightness of the image to be displayed and the maximum brightness of the image to be displayed.
In some examples of this embodiment, after the initial brightness of each display partition is modified according to the average brightness, the method further includes: and performing display driving according to the corrected brightness of each display partition.
The brightness correction method for the display panel provided by the embodiment comprises the following steps: determining the initial brightness of each display partition in a display panel according to an image to be displayed, wherein the display panel comprises a plurality of display partitions; determining the average brightness of the display panel according to the initial brightness of each display partition; comparing the average brightness with the initial brightness of each display partition, and taking the display partition with the initial brightness lower than the average brightness as a target display partition; the initial brightness of any display partition is lower than the average brightness, the display partition is in a dark state at present, and the problem of image detail loss is solved.
Example two
For better understanding of the present invention, the present embodiment provides a more specific example to illustrate the present invention, and as shown in fig. 2, the present embodiment provides a brightness correction method for a display panel, which includes but is not limited to:
s201, inputting an image signal to be displayed;
firstly, inputting an image to be displayed, taking an 8-bit display, 1920 × 1080 image signals and 30 × 60 (1800) block display partitions as an example in the present example;
s202, extracting characteristic data;
storing the input image signal to be displayed in a memory, and extracting data (gray-scale distribution map) of the image to be displayed and corresponding characteristic data (gray-scale histogram information of the image signal to be displayed in each display partition in the present example);
s203, determining the initial brightness of each display partition;
determining the brightness of pixels in each display partition according to the data and the characteristic data of the input image, and determining the initial brightness of the display partition according to the brightness of the pixels in each display partition, specifically, determining the initial brightness of the display partition according to the following formula, wherein Sm is the brightness of the mth sub-pixel in the partition, and Lint (n) is the determined initial brightness of the nth partition);
(n=1,2,..1800)。
s204, brightness correction is carried out on the target display partition;
specifically, the initial brightness of each display partition determined in the above step is corrected by the following formula, where Iave is the average brightness of all display partitions, TD is the dark field compensation coefficient (the coefficient used in this embodiment is 0.3), Lmax is the maximum brightness of all partitions, and lout (n) is the brightness of the nth partition after correction, where if the initial brightness of a display partition is greater than the average brightness, the initial brightness of the display partition is directly output as the brightness after correction, and if the initial brightness of a display partition is lower than the average brightness, the initial brightness of the display partition is taken as the target display partition, and the target display partition is corrected by the following formula, so as to improve the brightness of the target display partition.
(n=1,2,..1800)
S205, outputting the corrected brightness and performing display driving;
and matching the modified brightness determined in the step with a Tcon signal, and finally displaying the image to be displayed on a display.
According to the brightness correction method of the display panel, the input characteristic data (average brightness, maximum brightness and gray-scale histogram) of the image to be displayed is extracted and analyzed, the LED initial intensity (Linit) of each backlight display partition is determined, the low gray-scale area of the image is analyzed through the characteristic data, the compensation intensity of the image is determined, the LED intensity of the backlight partitions is corrected through the algorithm of the scheme, the final LED intensity (Lout) is obtained, finally, the corrected backlight signal is matched with the Tcon signal to display the image on the display, the brightness of the display partitions is improved, the problem that the dark details of the image to be displayed are lost due to the fact that the brightness of the display partitions is too low is solved, and the display effect is improved.
EXAMPLE III
Based on the same concept, the present embodiment provides a brightness correction apparatus of a display panel, as shown in fig. 3;
the display control method comprises a determining module 1, wherein the determining module 1 is used for determining the initial brightness of each display partition in a display panel according to an image to be displayed, and the display panel comprises a plurality of display partitions;
the determining module 1 is further configured to determine an average brightness of the display panel according to the initial brightness of each display partition;
the comparison module 2 is used for comparing the average brightness with the initial brightness of each display partition, and taking the display partition with the initial brightness lower than the average brightness as a target display partition;
and the correction module 3 is used for correcting the initial brightness of the target display partition and improving the display brightness of the target display partition.
It should be understood that, each module of the brightness correction apparatus for a display panel provided in this embodiment can combine to implement each step of the brightness correction method for a display panel, so as to achieve the same technical effect as each step of the brightness correction method for a display panel, and is not described herein again.
The brightness correction device for a display panel provided by the embodiment comprises: the display device comprises a determining module, a judging module and a display module, wherein the determining module is used for determining the initial brightness of each display partition in a display panel according to an image to be displayed, and the display panel comprises a plurality of display partitions; the determining module is further used for determining the average brightness of the display panel according to the initial brightness of each display partition; the comparison module is used for comparing the average brightness with the initial brightness of each display partition, and taking the display partition with the initial brightness lower than the average brightness as a target display partition; the correction module is used for correcting the initial brightness of the target display partition and improving the display brightness of the target display partition, wherein when the initial brightness of any display partition is lower than the average brightness, the display partition is in a dark state currently, and the problem that the details of an image are lost exists.
Example four
As shown in fig. 4, an embodiment of the present application provides a display device, which includes a processor 111, a communication interface 112, a memory 113, and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 complete mutual communication through the communication bus 114,
a memory 113 for storing a computer program;
in an embodiment of the present application, when the processor 111 is configured to execute the program stored in the memory 113, the method for correcting the brightness of the display panel according to any one of the foregoing method embodiments includes: determining the initial brightness of each display partition in a display panel according to an image to be displayed, wherein the display panel comprises a plurality of display partitions; determining the average brightness of the display panel according to the initial brightness of each display partition; comparing the average brightness with the initial brightness of each display partition, and taking the display partition with the initial brightness lower than the average brightness as a target display partition; and correcting the initial brightness of the target display partition, and improving the display brightness of the target display partition.
The present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the brightness correction method for a display panel provided in any one of the foregoing method embodiments.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for modifying brightness of a display panel, the method comprising:
determining the initial brightness of each display partition in a display panel according to an image to be displayed, wherein the display panel comprises a plurality of display partitions;
determining the average brightness of the display panel according to the initial brightness of each display partition;
comparing the average brightness with the initial brightness of each display partition, and taking the display partition with the initial brightness lower than the average brightness as a target display partition;
and correcting the initial brightness of the target display partition, and improving the display brightness of the target display partition.
2. The method of claim 1, wherein the modifying the initial brightness of the target display partition comprises:
and acquiring the maximum display brightness in all the display subareas, and correcting the initial brightness of the target display subarea according to the compensation coefficient and the maximum display brightness.
3. The method for correcting brightness of a display panel according to any one of claims 1-2, wherein determining the initial brightness of each display partition in the display panel according to the image to be displayed comprises:
acquiring a gray scale distribution map of the image to be displayed;
determining the brightness of each pixel in the display partition according to the gray scale distribution diagram;
and acquiring the initial brightness of the display partition according to the brightness of each pixel in the display partition.
4. The method of claim 3, wherein obtaining the initial brightness of the display partition according to the brightness of each pixel in the display partition comprises:
summing the brightness of each pixel in the display partition to obtain a total brightness value;
and dividing the total brightness value by the number of the pixels in the display partition to obtain a brightness average value of the pixels in the display partition, and taking the brightness average value as the initial brightness of the display partition.
5. The method of claim 3, wherein obtaining the initial brightness of the display region according to the brightness of each pixel in the display region comprises:
and carrying out root mean square on the brightness of all pixels in the display partition to obtain an average root brightness, and taking the average root brightness as the initial brightness of the display partition.
6. The luminance correction method of a display panel according to claim 3, wherein after comparing the average luminance with the initial luminance of each display section, the method further comprises:
taking the display subarea with the initial brightness higher than the average brightness as a first target display subarea;
and correcting the initial brightness of the first target display partition, and reducing the display brightness of the first target display partition.
7. The luminance correction method of a display panel according to claim 3, wherein the pixel comprises: red pixels, green pixels, blue pixels; or the like, or, alternatively,
the pixel includes: red pixels, green pixels, blue pixels, yellow pixels.
8. A luminance correction apparatus for a display panel, comprising:
the display device comprises a determining module, a judging module and a display module, wherein the determining module is used for determining the initial brightness of each display partition in a display panel according to an image to be displayed, and the display panel comprises a plurality of display partitions;
the determining module is further used for determining the average brightness of the display panel according to the initial brightness of each display partition;
the comparison module is used for comparing the average brightness with the initial brightness of each display partition, and taking the display partition with the initial brightness lower than the average brightness as a target display partition;
and the correction module is used for correcting the initial brightness of the target display partition and improving the display brightness of the target display partition.
9. The luminance correction apparatus for a display panel according to claim 8, wherein correcting the initial luminance of the target display section comprises:
and acquiring the maximum display brightness in all the display subareas, and correcting the initial brightness of the target display subarea according to the compensation coefficient and the maximum display brightness.
10. The display equipment is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing the communication between the processor and the communication interface;
a memory for storing a computer program;
a processor for implementing the steps of the method for correcting luminance of a display panel according to any one of claims 1 to 7 when executing the program stored in the memory.
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