CN116564226A - Preprocessing method of data to be compensated, picture compensation method and related equipment - Google Patents

Preprocessing method of data to be compensated, picture compensation method and related equipment Download PDF

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Publication number
CN116564226A
CN116564226A CN202310692083.4A CN202310692083A CN116564226A CN 116564226 A CN116564226 A CN 116564226A CN 202310692083 A CN202310692083 A CN 202310692083A CN 116564226 A CN116564226 A CN 116564226A
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sub
data
pixels
area
brightness data
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吕晓娣
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics Co Ltd
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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]
    • G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/04—Maintaining the quality of display appearance

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention provides a preprocessing method of data to be compensated, a picture compensation method and related equipment. The preprocessing method of the data to be compensated comprises the following steps: acquiring first brightness data of a plurality of sub-pixels in a display panel when a picture to be compensated with gray scale smaller than or equal to a preset gray scale is displayed; determining a first part of sub-pixels and a second part of sub-pixels from the plurality of sub-pixels, adjusting the first brightness data of the first part of sub-pixels to be second brightness data, and adjusting the first brightness data of the second part of sub-pixels to be third brightness data; the second brightness data is larger than the first brightness data, and the third brightness data is smaller than the first brightness data. By adopting the scheme of the invention, more reasonable compensation data can be obtained when Mura compensation is carried out, and better compensation effect is achieved.

Description

Preprocessing method of data to be compensated, picture compensation method and related equipment
Technical Field
The invention relates to a preprocessing method of data to be compensated, a picture compensation method and related equipment, and belongs to the technical field of display.
Background
OLED (Organic Light-Emitting Diode) has a series of advantages of self-luminescence, wide viewing angle, light weight, thinness, high brightness, low power consumption, quick response and the like, so that the OLED display panel becomes a very popular display device at home and abroad, and has wide application prospect.
In the current OLED display panel, mura (uneven display) problems occur during light-emitting display due to the process, materials and the like, thereby affecting the use experience of users. This problem is more pronounced especially in scenes with low brightness pictures. At present, a Demura algorithm is generally adopted to compensate a display picture, but the compensation effect on the Mura in a scene of a low-brightness picture is poor.
Disclosure of Invention
The invention provides a picture compensation method, a picture compensation device, picture compensation equipment and a display device, which are used for solving the problem that the display device has obvious Mura in a scene of a low-brightness picture.
In a first aspect, an embodiment of the present invention provides a method for preprocessing data to be compensated, which is applied to a compensation algorithm for compensating a display screen of a display panel, where the method includes;
acquiring first brightness data of a plurality of sub-pixels in a display panel when a picture to be compensated with gray scale smaller than or equal to a preset gray scale is displayed;
determining a first part of sub-pixels and a second part of sub-pixels from the plurality of sub-pixels, adjusting the first brightness data of the first part of sub-pixels to be second brightness data, and adjusting the first brightness data of the second part of sub-pixels to be third brightness data; wherein the second luminance data is larger than the first luminance data, and the third luminance data is smaller than the first luminance data.
Optionally, the determining the first part of sub-pixels and the second part of sub-pixels from the plurality of sub-pixels includes:
determining the area where each sub-pixel is located; the display area of the display panel is divided into a first area, a second area and a third area in advance, the first area corresponds to an area where an acquisition device for acquiring the brightness data is located, the second area is located at the edge of the display area of the display panel, and the third area is located between the first area and the second area;
the sub-pixels located in the third region are determined as first partial sub-pixels, and the sub-pixels located in the second region are determined as second partial sub-pixels.
Optionally, the determining the first part of sub-pixels and the second part of sub-pixels from the plurality of sub-pixels includes:
comparing the first brightness data of each sub-pixel with the corresponding reference brightness data;
the sub-pixels of which the first luminance data is greater than the corresponding reference luminance data are determined as first partial sub-pixels, and the sub-pixels of which the first luminance data is less than the corresponding reference luminance data are determined as second partial sub-pixels.
Optionally, the determining the first part of sub-pixels and the second part of sub-pixels from the plurality of sub-pixels includes:
determining the area where each sub-pixel is located, and comparing the first brightness data of each sub-pixel with the corresponding reference brightness data; the display area of the display panel is divided into a first area, a second area and a third area in advance, the first area corresponds to an area where an acquisition device for acquiring the brightness data is located, the second area is located at the edge of the display area of the display panel, and the third area is located between the first area and the second area;
determining a sub-pixel which is positioned in the third area and has first brightness data which is larger than or equal to corresponding reference brightness data and a sub-pixel which is positioned in the first area and has first brightness data which is larger than corresponding reference brightness data as a first part of sub-pixels, and determining a sub-pixel which is positioned in the second area and has first brightness data which is smaller than or equal to corresponding reference brightness data and a sub-pixel which is positioned in the first area and has first brightness data which is smaller than corresponding reference brightness data as a second part of sub-pixels;
Calculating difference degree data of sub-pixels which are positioned in the third area and the first brightness data are smaller than the corresponding reference brightness data to obtain first difference degree data, and calculating difference degree data of sub-pixels which are positioned in the second area and the first brightness data are larger than the corresponding reference brightness data to obtain second difference degree data; the difference degree data is an absolute value of a difference value between a proportion of the brightness data relative to the corresponding reference brightness data and a preset adjustment proportion;
determining the sub-pixels of which the first difference degree data is smaller than preset difference data and the sub-pixels of which the second difference degree data is larger than or equal to the preset difference data as first partial sub-pixels, and determining the sub-pixels of which the first difference degree data is larger than or equal to the preset difference data and the sub-pixels of which the second difference degree data is smaller than the preset difference data as second partial sub-pixels.
Optionally, the reference luminance data corresponding to any one sub-pixel includes: the average value of the first luminance data of all the sub-pixels having the same color and displaying the same gray scale as the sub-pixel.
Optionally, the adjusting the first luminance data of the first portion of the sub-pixels to the second luminance data and the first luminance data of the second portion of the sub-pixels to the third luminance data includes:
Calculating the product of the first brightness data and the first adjustment proportion of the first part of sub-pixels to obtain second brightness data, and calculating the product of the first brightness data and the second adjustment proportion of the second part of sub-pixels to obtain third brightness data; the first adjustment ratio is greater than 1, and the second adjustment ratio is less than 1.
Optionally, the method further comprises:
the sub-pixels located in the first region are determined as third partial sub-pixels, and the first luminance data of the third partial sub-pixels is maintained unchanged.
In a second aspect, an embodiment of the present invention further provides a picture compensation method, where the method includes:
acquiring the second brightness data and the third brightness data which are processed by the preprocessing method of the data to be compensated in any one of the first aspect;
and calculating the compensation data of the first part of sub-pixels based on the second brightness data, calculating the compensation data of the second part of sub-pixels based on the third brightness data, and compensating the picture to be compensated based on the compensation data.
In a third aspect, an embodiment of the present invention further provides a processing device, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the method for preprocessing data to be compensated according to any one of the first aspect or the steps of the method for picture compensation according to the second aspect.
In a fourth aspect, an embodiment of the present invention further provides a display apparatus, which includes the processing device according to the third aspect.
In the preprocessing method, the picture compensation method and the related equipment for the data to be compensated, when the gray scale of the picture to be compensated is smaller than or equal to the preset gray scale, the first brightness data of a plurality of sub-pixels in the display panel are obtained; determining a first part of sub-pixels and a second part of sub-pixels from the plurality of sub-pixels; the first brightness data of the first part of the sub-pixels are adjusted to be larger second brightness data, the first brightness data of the second part of the sub-pixels are adjusted to be smaller third brightness data, and therefore the difference between the brightness data of different sub-pixels can be enlarged, the contrast ratio of brightness and darkness can be improved, mura details are better reflected, and more reasonable compensation data can be obtained through matching when compensation data are calculated in the follow-up steps, and better compensation effect is achieved.
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. Furthermore, these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
FIG. 1 is a flow chart of a method for preprocessing data to be compensated according to an embodiment of the present invention;
FIG. 2 is a schematic view illustrating the area division of a display area of a display panel according to an embodiment of the invention;
FIG. 3 is a flow chart of a specific implementation method of step S102 in the method shown in FIG. 1;
FIG. 4 is a flowchart of a frame compensation method according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a preprocessing device for data to be compensated according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a picture compensation device according to an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The following embodiments and features of the embodiments may be combined with each other without conflict.
Summary of the application
In an OLED display panel, due to the limitation of factors such as process and materials, different sub-pixels have different brightness when displaying light under the same voltage and current, which results in Mura (irregular bright and dark spots or bright and dark stripes, i.e. uneven display) in an actual display screen, and the Mura problem is particularly obvious in a scene of a low-brightness screen, thereby affecting the use experience of users. In view of this, display panel manufacturers usually use Demura algorithm to compensate for Mura in the display screen to improve the display effect.
The main current compensation method adopts a Demura algorithm to carry out optical compensation, and the principle is as follows: the brightness data of each sub-pixel when actually emitting light is collected through optical collection equipment such as a camera, and then compensation data of each sub-pixel is calculated by adopting a Demura algorithm according to the difference of the brightness data, so that different brightness compensation is carried out on each sub-pixel, and the brightness of final display is consistent.
In practice, due to limitations of the sub-pixels, when the Demura algorithm compensates the brightness by using a fixed compensation coefficient, the compensation effect on the low-brightness image is poor, so that in some schemes, the compensation coefficient for the low-brightness gray scale is specially set, and the final compensation data is calculated by multiplying power and amplifying or shrinking, however, in practical application, the compensation effect is still relatively poor.
In order to solve the problems, the invention provides a compensation scheme, which better embodies Mura details by carrying out special two-polarization processing on brightness data under a low-brightness picture, thereby matching more reasonable compensation data when calculating the compensation data and achieving better compensation effect. The specific implementations are described below without limitation by way of several examples or embodiments.
Exemplary method
Referring to fig. 1, an embodiment of the present invention provides a method for preprocessing data to be compensated. The preprocessing method of the data to be compensated can be applied to a compensation algorithm for compensating the display picture of the display panel, so that the finally calculated compensation data is more reasonable, and a better compensation effect is achieved. As shown in fig. 1, the preprocessing method of the data to be compensated in this embodiment includes the following steps:
step S101: and acquiring first brightness data of a plurality of sub-pixels in the display panel when the display gray level is smaller than or equal to a preset gray level of a picture to be compensated.
Specifically, the scheme of the embodiment is mainly used for compensating Mura in a display picture under low gray scale (i.e. low brightness, brightness is positively correlated with gray scale), so when the scheme is actually applied, the range of the current display gray scale can be firstly determined when the compensation is performed by adopting a Demura algorithm, when the display gray scale is larger than a preset gray scale, the current display is indicated to be a high gray scale picture, and at the moment, compensation data can be calculated by adopting a conventional Demura algorithm; when the displayed gray level is less than or equal to the preset gray level, the display is a low gray level picture which needs special compensation treatment. The specific value of the preset gray level can be set according to actual needs, for example, for a common dividing mode of 0-255 gray levels, the value of the preset gray level can be 10, 15, 20 … … or 50, etc. In practical application, the device can be preset when leaving a factory, and can also allow a user to adjust by himself.
In addition, an acquisition device such as an optical camera may be preset in a display device for displaying a picture to be compensated, or an external acquisition device may be used, and then when Mura compensation is required, the current brightness data of each sub-pixel is acquired by using the acquisition device. When the display gray level is smaller than or equal to the preset gray level, the brightness data acquired by the acquisition equipment is the first brightness data corresponding to each sub-pixel. These first luminance data may be stored in a memory as raw data that is preprocessed in a subsequent step.
Step S102: and determining a first part of sub-pixels and a second part of sub-pixels from the plurality of sub-pixels, adjusting the first brightness data of the first part of sub-pixels to be second brightness data, and adjusting the first brightness data of the second part of sub-pixels to be third brightness data. The second brightness data is larger than the first brightness data, and the third brightness data is smaller than the first brightness data.
Specifically, when displaying low gray scale, the overall brightness of the display device is low, and the brightness difference of different sub-pixels is also small, so when calculating the compensation data according to the conventional compensation algorithm, the compensation data corresponding to different sub-pixels is similar, and the difference between Mura brightness and darkness cannot be effectively compensated. In this regard, in this step, a first partial subpixel and a second partial subpixel are determined from a plurality of subpixels, and then the first luminance data of the first partial subpixel is increased to second luminance data, and the first luminance data of the second partial subpixel is decreased to third luminance data. Therefore, the difference of the brightness data of the two types of sub-pixels can be enlarged, namely the two types of sub-pixels have more obvious brightness difference, so that the details of Mura are highlighted, and more reasonable compensation data can be obtained through subsequent calculation.
In some embodiments, when the first part of the sub-pixels and the second part of the sub-pixels are determined from the plurality of sub-pixels, the determination may be performed according to differences between different areas of the display panel in actual use.
More specifically, in one embodiment, first, considering that in an actual display device, when the collecting device collects luminance data in a region corresponding to itself, no significant calculation error is generated due to an algorithm for correcting image distortion, and the obtained luminance data approaches to real data, therefore, this partial region may be divided into separate regions as a first region, and the first luminance data of the sub-pixels of the first region may be maintained unchanged in a subsequent processing step. Secondly, considering that the special-shaped areas of the display device, such as blind holes, fillets, gaps and the like, are generally positioned at the edge of the display area, the special-shaped structures of the special-shaped areas can increase the error of the acquired brightness data, and the positions are relatively far away from the acquisition equipment, so that the image distortion is serious, and therefore, a relatively obvious calculation error can be generated due to an algorithm for correcting the image distortion; also, mura is relatively more noticeable at the edge positions of most display devices, and thus, this partial region is divided into separate regions as a second region so that a special compensation process is performed for this region. In addition, the region between the first region and the second region is divided into a third region, and the first luminance data of the sub-pixels of the third region is processed differently from the second region in a subsequent processing step, for example, in the case of decreasing the first luminance data of the second region, the first luminance data of the third region may be increased so as to enlarge the difference in luminance data of the sub-pixels in the third region and the second region.
For example, referring to fig. 2, in one embodiment, a display area of a display panel is divided into a first region R1, a second region R2, and a third region R3 as illustrated. The areas R1, R2 and R3 can all perform image display, and the first area corresponds to the position of the collecting device and is located in the central area of the display area (in order to facilitate the collecting device to collect the first brightness data of the sub-pixels at each position of the display area, the collecting device generally considers to be arranged in the central area of the display area); the second areas are positioned at four edge positions of the display area and correspond to the special-shaped areas of the display panel; the region between the first region and the second region serves as a third region.
Through the above region division, in step S102, when determining the first part of sub-pixels and the second part of sub-pixels from the plurality of sub-pixels, the sub-pixels located in the second region may be determined as the first part of sub-pixels, that is, the first luminance data of the sub-pixels in the second region may be reduced, so that the compensation data of the region may be increased, and the compensation effect may be improved; meanwhile, the sub-pixels in the third area are determined to be the second partial sub-pixels, namely the first brightness data of the sub-pixels in the third area are increased, so that the difference between the brightness data of the sub-pixels in the second area and the brightness data of the sub-pixels in the third area can be increased, and the follow-up calculation is facilitated, and more reasonable compensation data can be obtained. In addition, the sub-pixels in the first area can be determined as the third part of sub-pixels, and the first brightness data of the third part of sub-pixels can be maintained unchanged because the brightness data corresponding to the first area is relatively close to reality, and then the compensation data of the third part of sub-pixels can be calculated directly based on the first brightness data of the third part of sub-pixels, and the compensation to-be-compensated picture is compensated based on the compensation data of the third part of sub-pixels.
In still other embodiments, when determining the first portion of sub-pixels and the second portion of sub-pixels from the plurality of sub-pixels in step S102, another implementation may further include: comparing the first brightness data of each sub-pixel with the corresponding reference brightness data; the sub-pixels of which the first luminance data is greater than the corresponding reference luminance data are determined as first partial sub-pixels, and the sub-pixels of which the first luminance data is less than the corresponding reference luminance data are determined as second partial sub-pixels.
In particular, as previously mentioned, the purpose of this step is to expand the difference in luminance data of the first part of the sub-pixels and the second part of the sub-pixels, i.e. to make the two types of sub-pixels more distinct in brightness. Therefore, in addition to the implementation in the foregoing embodiment (the first portion sub-pixel and the second portion sub-pixel are determined according to the difference in different areas of the display panel in actual use), in this embodiment, the first portion sub-pixel and the second portion sub-pixel may be determined according to the difference in the original first luminance data of each sub-pixel, specifically, the sub-pixel whose first luminance data is greater than the corresponding reference luminance data, that is, the relatively bright sub-pixel is determined as the first portion sub-pixel, and at the same time, the sub-pixel whose first luminance data is smaller than the corresponding reference luminance data, that is, the relatively dark sub-pixel is determined as the second portion sub-pixel, so that the difference in luminance data of the first portion sub-pixel and the second portion sub-pixel can be respectively expanded and contracted in the subsequent steps so that the difference in luminance data of the two types of sub-pixels can be expanded. And for the sub-pixels of which the first brightness data is just equal to the corresponding reference brightness data, the sub-pixels can be determined as the third part of sub-pixels, the first brightness data of the third part of sub-pixels can be kept unchanged, the compensation data of the third part of sub-pixels can be calculated directly based on the first brightness data of the third part of sub-pixels, and the picture to be compensated is compensated based on the compensation data of the third part of sub-pixels.
In practice, the ratio of the first luminance data to the reference luminance data of each sub-pixel may be calculated, and for sub-pixels with a ratio greater than 1, the sub-pixels with a ratio less than 1 are the first portion of sub-pixels, and for sub-pixels with a ratio less than 1, the second portion of sub-pixels.
In some embodiments, the reference luminance data corresponding to any one of the sub-pixels includes: the average value of the first luminance data of all the sub-pixels having the same color and displaying the same gray scale as the sub-pixel.
Specifically, in practice, when the compensation data is calculated, the display panel is first controlled to display a solid-color picture (e.g., a solid-red picture corresponding to 10 gray levels) with the same gray level, and then the first brightness data of all the sub-pixels that emit light are collected. Ideally, the first luminance data of the sub-pixels should be identical, but in reality, some of the sub-pixels will have relatively high luminance and some of the sub-pixels will have relatively low luminance for various reasons, and these luminance differences will be Mura after being captured by human eyes.
Therefore, in this embodiment, when the luminance data is collected and preprocessed, the first luminance data of all the subpixels with the same color under the current display gray scale can be obtained, and the average value of the first luminance data is calculated and used as the reference luminance data of the subpixels with the same color under the current display gray scale. In this case, that is, the sub-pixels whose first luminance data is larger than the average value of the luminance data are regarded as brighter sub-pixels, and the sub-pixels whose first luminance data is smaller than the average value of the luminance data are regarded as darker sub-pixels.
In other embodiments, the reference luminance data corresponding to any one of the sub-pixels may be a predetermined fixed value. Specifically, since the luminance data and the gray scale are positively correlated, for each gray scale value smaller than or equal to the preset gray scale, the fixed luminance data corresponding thereto can be directly and individually set as the corresponding reference luminance data. For example, the reference luminance data may be set to lum1 for the gray level a1, lum2 for the gray level a2, and so on.
Of course, it will be appreciated that other manners of determining the reference luminance data may be used, so long as the first portion of the sub-pixels and the second portion of the sub-pixels can be determined conveniently according to the size of the first luminance data, which is not limited.
In addition, in step S102, when determining the first portion of the sub-pixels and the second portion of the sub-pixels, the two methods of the foregoing two embodiments may be combined.
For example, in some embodiments, when determining the first portion of the sub-pixels and the second portion of the sub-pixels from the plurality of sub-pixels in step S102, as shown in fig. 3, the specific process may include the following steps:
step S1021: determining the area where each sub-pixel is located, and comparing the first brightness data of each sub-pixel with the corresponding reference brightness data.
The display area of the display panel may be divided into a first area, a second area and a third area in advance in the manner of the foregoing embodiment, that is, the first area corresponds to an area where the collecting device for collecting luminance data is located, the second area is located at an edge of the display area of the display panel, and the third area is located between the first area and the second area. And then determining the area where each sub-pixel is located based on the area.
In addition, the reference luminance data may also be determined by using the scheme of the foregoing embodiment, for example, an average value of the first luminance data of each color sub-pixel under the current display gray scale may be used as the reference luminance data corresponding to the color sub-pixel under the current display gray scale.
Step S1022: the sub-pixels which are positioned in the third area and have the luminance data larger than or equal to the corresponding reference luminance data and the sub-pixels which are positioned in the first area and have the first luminance data larger than the corresponding reference luminance data are determined as first partial sub-pixels, and the sub-pixels which are positioned in the second area and have the luminance data smaller than or equal to the corresponding reference luminance data and the sub-pixels which are positioned in the first area and have the first luminance data smaller than the corresponding reference luminance data are determined as second partial sub-pixels.
Specifically, according to the description of the foregoing embodiment, the first luminance data of the sub-pixels located in the third region needs to be enlarged while the first luminance data of the sub-pixels whose first luminance data is larger than the corresponding reference luminance data also needs to be enlarged, and therefore, for the sub-pixels located in the third region and the sub-pixels whose first luminance data is larger than the corresponding reference luminance data, the adjustment manners of their luminance data agree, and therefore, the sub-pixels satisfying both conditions can be determined as the first partial sub-pixels. Similarly, for the sub-pixels located in the second region and the sub-pixels whose first luminance data is smaller than the corresponding reference luminance data, the adjustment manners of their luminance data are identical (the corresponding luminance data all need to be reduced), so that the sub-pixels satisfying both conditions can be determined as the second partial sub-pixels.
In addition, for the sub-pixels located in the third region but having the first luminance data equal to the corresponding reference luminance data, in order to enlarge the luminance difference between the sub-pixels, it may be divided into the first partial sub-pixels. Similarly, for the sub-pixels located in the second region but the first luminance data is equal to the corresponding reference luminance data, in order to enlarge the luminance difference between the sub-pixels, it may be divided into the second partial sub-pixels.
In addition, for the sub-pixels located in the first region and having the first luminance data larger than the corresponding reference luminance data, in order to enlarge the luminance difference between the sub-pixels, the sub-pixels may be divided into the first partial sub-pixels. Similarly, for the sub-pixels located in the first region and having the first luminance data smaller than the corresponding reference luminance data, in order to enlarge the luminance difference between the sub-pixels, the sub-pixels may be divided into the second partial sub-pixels.
Step S1023: calculating difference degree data of sub-pixels which are positioned in the third area and the first brightness data are smaller than the corresponding reference brightness data to obtain first difference degree data, and calculating difference degree data of sub-pixels which are positioned in the second area and the first brightness data are larger than the corresponding reference brightness data to obtain second difference degree data; the difference degree data is an absolute value of a difference value between a ratio of the first brightness data relative to the corresponding reference brightness data and a preset adjustment ratio.
Specifically, the adjustment manners of the sub-pixels located in the third area and the sub-pixels of which the first luminance data is smaller than the corresponding reference luminance data are inconsistent, so that for the sub-pixels located in the third area but of which the first luminance data is smaller than the corresponding reference luminance data, a conflict exists when determining the first part of sub-pixels and the second part of sub-pixels according to the two manners of the foregoing embodiments; similarly, for the sub-pixels located in the second region but having the first luminance data greater than the corresponding reference luminance data, there is a conflict in determining the first portion of sub-pixels and the second portion of sub-pixels in two ways according to the foregoing embodiment. Thus, for these sub-pixels where there is a conflict, it is necessary to further determine whether they should be the first part sub-pixels or the second part sub-pixels.
The rule in this embodiment is to calculate the difference degree data of such sub-pixels, specifically, the absolute value of the difference between the ratio of the first luminance data to the corresponding reference luminance data and the preset adjustment ratio. The formula is as follows:
wherein x represents difference degree data, lum 1 First luminance data representing a subpixel, lum 0 Representing reference luminance data, ratio i Indicating a preset adjustment ratio. Wherein, the ratio of the adjustment is preset i Representing the adjustment ratio when adjusting the brightness dataIn the process, the adjustment is performed according to the adjustment proportion i The value is ratio 1 ，ratio 1 > 1; when->In the process, the adjustment is reduced according to the adjustment proportion i The value is ratio 2 ，ratio 2 < 1. In general, ratio 1 May be set to about 1.02 ratio 2 The gray level value may be set to about 0.98, specifically, may be adjusted according to an actual gray level value, and is not limited to two decimal places.
The difference degree data x may be a parameter indicating the magnitude of the adjustment amount when the first luminance data is adjusted to the second luminance data or to the third luminance data in accordance with the magnitude relation between the first luminance data and the corresponding reference luminance data.
Generally, when the adjustment amount is larger, it is more reasonable to determine the first part of sub-pixels and the second part of sub-pixels according to the size relation between the first brightness data and the corresponding reference brightness data, because the error of the result is relatively smaller after the actual parameter calculation is performed in this way; when the determination is made according to the region in which the sub-pixels are located, the error of the result of determining the first portion of sub-pixels and the second portion of sub-pixels is relatively large because the process of dividing the second region and the third region itself has relatively large errors. However, when the first part of sub-pixels and the second part of sub-pixels are determined according to the region where the sub-pixels are located, the processing speed is significantly faster, so that when the adjustment amount is small, the processing time can be shortened by adopting a region division manner, and even if an error exists, the processing time can be within an acceptable range.
Step S1024: the sub-pixels of which the first difference degree data is smaller than the preset difference data and the sub-pixels of which the second difference degree data is larger than or equal to the preset difference data are determined to be the first partial sub-pixels, and the sub-pixels of which the first difference degree data is larger than or equal to the preset difference data and the sub-pixels of which the second difference degree data is smaller than the preset difference data are determined to be the second partial sub-pixels.
Wherein the preset difference data is a preset parameter, such as at a ratio 1 Set to about 1.02 ratio 2 When the preset difference data is set to about 0.98, the preset difference data may be set to about 0.05. Of course, the specific value of the preset difference data can be adjusted according to actual needs. Generally, the larger the specific value setting of the preset difference data, the faster the actual processing speed, but the larger the error of the result.
Specifically, according to the foregoing principle, since the parameter of the difference degree data x may characterize the magnitude of the adjustment amount when the luminance data is adjusted according to the magnitude relation of the first luminance data and the corresponding reference luminance data, and when the adjustment amount is large, it is more reasonable to determine the first partial sub-pixel and the second partial sub-pixel according to the magnitude relation of the first luminance data and the corresponding reference luminance data, this step corresponds to determining the first partial sub-pixel and the second partial sub-pixel according to the magnitude relation of the first luminance data and the corresponding reference luminance data when the adjustment amount is large, and determining the first partial sub-pixel and the second partial sub-pixel according to the region in which the sub-pixel is located when the adjustment amount is small.
After determining the first and second sub-pixels, the luminance data of the two sub-pixels needs to be further adjusted to enlarge the difference in luminance data between the sub-pixels.
In some embodiments, the specific process of adjusting the first luminance data of the first portion of the sub-pixels to the second luminance data and the first luminance data of the second portion of the sub-pixels to the third luminance data includes: calculating the product of the first brightness data of the first partial sub-pixels and the first adjustment proportion to obtain the firstAnd calculating the product of the first brightness data and the second adjustment proportion of the second part of sub-pixels to obtain third brightness data. Wherein the first adjustment ratio is the ratio described above 1 Which is greater than 1, the second adjustment ratio is the ratio described above 2 It is less than 1.
The first luminance data of the first part of sub-pixels and the second part of sub-pixels can be conveniently adjusted to proper values by means of proportional adjustment, so that the difference of the luminance data between the sub-pixels is enlarged.
It is to be understood that, in particular, in addition to directly calculating the product of the first luminance data and the first adjustment ratio or the second adjustment ratio, other reasonable adjustment manners, such as summing with a set adjustment amount, etc., may be adopted or combined, so long as the difference between the luminance data between the sub-pixels can be enlarged, which is not limited.
Through the preprocessing scheme, the difference between the brightness data of different sub-pixels can be enlarged, so that the contrast of brightness and darkness can be improved, mura details are better reflected, more reasonable compensation data can be obtained by matching when the compensation data are calculated later, and a better compensation effect is achieved.
On the basis of the scheme, the embodiment of the invention also provides a picture compensation method. Referring to fig. 4, fig. 4 is a flowchart illustrating a picture compensation method according to an embodiment of the invention. As shown in fig. 4, the picture compensation method of the present embodiment includes the steps of:
step S201: second luminance data and third luminance data of the sub-pixels are acquired. The second luminance data and the third luminance data are obtained by processing the data to be compensated by the preprocessing method of any embodiment.
Step S202: and calculating the compensation data of the first part of sub-pixels based on the second brightness data, calculating the compensation data of the second part of sub-pixels based on the third brightness data, and compensating the picture to be compensated based on the compensation data.
In the step, the compensation data of each sub-pixel is calculated based on the brightness data adjusted in the step, and as the difference between the brightness data of different sub-pixels is enlarged in the adjustment process, the contrast of brightness and darkness can be improved, mura details are better reflected, and more reasonable compensation data can be obtained by matching when the compensation data is calculated, so that a better compensation effect is achieved.
The process of calculating the compensation data may be implemented by using an existing Demura compensation algorithm, which is not described herein.
Exemplary apparatus
Referring to fig. 5, fig. 5 is a schematic structural diagram of a preprocessing device for data to be compensated according to an embodiment of the present invention. As shown in fig. 5, the picture compensation apparatus provided by the embodiment of the present invention includes: an acquisition module 300 and an adjustment module 310; wherein, the liquid crystal display device comprises a liquid crystal display device,
the obtaining module 300 is configured to obtain first luminance data of a plurality of sub-pixels in the display panel when displaying a frame to be compensated with a gray level less than or equal to a preset gray level;
the adjustment module 310 is configured to determine a first portion of sub-pixels and a second portion of sub-pixels from the plurality of sub-pixels, adjust first luminance data of the first portion of sub-pixels to second luminance data, and adjust first luminance data of the second portion of sub-pixels to third luminance data; the second luminance data is larger than the first luminance data, and the third luminance data is smaller than the first luminance data.
According to the preprocessing device for the data to be compensated, provided by the invention, the sub-pixels in the low-gray-scale (namely, less than or equal to the preset gray-scale) picture are distinguished, and the first brightness data of different sub-pixels are adjusted to enlarge the difference between the brightness data of different sub-pixels, so that the contrast ratio of brightness and darkness can be improved, mura details can be better reflected, more reasonable compensation data can be obtained by matching when the compensation data is calculated, and a better compensation effect is achieved.
In some embodiments, the adjustment module 310 is specifically configured to, when determining the first portion of the sub-pixels and the second portion of the sub-pixels from the plurality of sub-pixels: determining the area where each sub-pixel is located; determining the sub-pixels located in the third region as first partial sub-pixels, and determining the sub-pixels located in the second region as second partial sub-pixels; the display area of the display panel is divided into a first area, a second area and a third area in advance, the first area corresponds to an area where the acquisition equipment for acquiring brightness data is located, the second area is located at the edge of the display area of the display panel, and the third area is located between the first area and the second area.
In some embodiments, the adjustment module 310 is specifically configured to, when determining the first portion of the sub-pixels and the second portion of the sub-pixels from the plurality of sub-pixels: comparing the first brightness data of each sub-pixel with the corresponding reference brightness data; the sub-pixels of which the first luminance data is greater than the corresponding reference luminance data are determined as first partial sub-pixels, and the sub-pixels of which the first luminance data is less than the corresponding reference luminance data are determined as second partial sub-pixels.
In some embodiments, the adjustment module 310 is specifically configured to, when determining the first portion of the sub-pixels and the second portion of the sub-pixels from the plurality of sub-pixels: determining the area where each sub-pixel is located, and comparing the first brightness data of each sub-pixel with the corresponding reference brightness data; determining a sub-pixel which is positioned in the third area and has the first brightness data larger than or equal to the corresponding reference brightness data and a sub-pixel which is positioned in the first area and has the first brightness data larger than the corresponding reference brightness data as a first partial sub-pixel, and determining a sub-pixel which is positioned in the second area and has the first brightness data smaller than or equal to the corresponding reference brightness data and a sub-pixel which is positioned in the first area and has the first brightness data smaller than the corresponding reference brightness data as a second partial sub-pixel; calculating difference degree data of sub-pixels which are positioned in the third area and the first brightness data are smaller than the corresponding reference brightness data to obtain first difference degree data, and calculating difference degree data of sub-pixels which are positioned in the second area and the first brightness data are larger than the corresponding reference brightness data to obtain second difference degree data; determining sub-pixels of which the first difference degree data is smaller than preset difference data and sub-pixels of which the second difference degree data is larger than or equal to the preset difference data as first partial sub-pixels, and determining sub-pixels of which the first difference degree data is larger than or equal to the preset difference data and sub-pixels of which the second difference degree data is smaller than the preset difference data as second partial sub-pixels; the display area of the display panel is divided into a first area, a second area and a third area in advance, wherein the first area corresponds to an area where the acquisition equipment for acquiring brightness data is located, the second area is positioned at the edge of the display area of the display panel, and the third area is positioned between the first area and the second area; the difference degree data is the absolute value of the difference value between the proportion of the first brightness data relative to the corresponding reference brightness data and the preset adjustment proportion.
In some embodiments, the reference luminance data corresponding to any one of the sub-pixels includes: the average value of the first luminance data of all the sub-pixels having the same color and displaying the same gray scale as the sub-pixel.
In some embodiments, the adjustment module 310 is specifically configured to, when adjusting the first luminance data of the first portion of the sub-pixels to the second luminance data and the first luminance data of the second portion of the sub-pixels to the third luminance data: calculating the product of the first brightness data and the first adjustment proportion of the first part of sub-pixels to obtain second brightness data, and calculating the product of the first brightness data and the second adjustment proportion of the second part of sub-pixels to obtain third brightness data; the first adjustment ratio is greater than 1 and the second adjustment ratio is less than 1.
In some embodiments, the adjustment module 310 is further configured to: the sub-pixels located in the first region are determined as the third partial sub-pixels, and the first luminance data of the third partial sub-pixels is maintained unchanged.
For specific limitations of the preprocessing apparatus for the data to be compensated, reference may be made to the above limitation of the preprocessing method for the data to be compensated, and no further description is given here. The respective modules in the above-described picture compensation apparatus may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In addition, referring to fig. 6, fig. 6 is a schematic structural diagram of a picture compensation device according to an embodiment of the invention. As shown in fig. 6, the picture compensation apparatus provided by the embodiment of the present invention includes: an acquisition module 300, an adjustment module 310, and a compensation module 320; the acquiring module 300 and the adjusting module 310 may be the acquiring module 300 and the adjusting module 310 of the embodiment shown in fig. 5, respectively. The compensation module 320 is at least configured to: the compensation data of the first part of sub-pixels is calculated based on the second brightness data processed by the adjusting module 310, and the compensation data of the second part of sub-pixels is calculated based on the third brightness data processed by the adjusting module 310, and the picture to be compensated is compensated based on the compensation data.
Since the picture compensation apparatus of this embodiment includes the corresponding modules of the preprocessing apparatus for data to be compensated of any of the foregoing embodiments. Therefore, when the compensation data is calculated, more reasonable compensation data can be obtained by matching, and a better compensation effect is achieved.
Exemplary processing device and display apparatus
The embodiments of the present invention also provide a processing device including a processor, a memory, and a computer program stored on the memory and executable on the processor, the computer program implementing the steps of preprocessing data to be compensated or the steps of a picture compensation method as any one of the exemplary method sections when executed by the processor. The processing device may be a processing chip disposed inside the display device or a stand-alone device communicatively coupled to the display device.
On the basis, the embodiment of the invention also provides a display device which comprises the processing equipment. The display device may be a smart phone or tablet computer or the like.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present invention should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present invention belongs. The terms "first," "second," and the like, as used in embodiments of the present invention, do not denote any order, quantity, or importance, but rather are used to avoid intermixing of components.
Throughout this specification, unless the context requires otherwise, the term "comprise" is to be construed in an open, inclusive sense, i.e. as "comprising, but not limited to. In the description of the present specification, the terms "one embodiment," "some embodiments," "example embodiments," "examples," "particular examples," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Claims (10)

1. A method for preprocessing data to be compensated, which is applied to a compensation algorithm for compensating a display picture of a display panel, the method comprising:
acquiring first brightness data of a plurality of sub-pixels in a display panel when a picture to be compensated with gray scale smaller than or equal to a preset gray scale is displayed;
determining a first part of sub-pixels and a second part of sub-pixels from the plurality of sub-pixels, adjusting the first brightness data of the first part of sub-pixels to be second brightness data, and adjusting the first brightness data of the second part of sub-pixels to be third brightness data; wherein the second luminance data is larger than the first luminance data, and the third luminance data is smaller than the first luminance data.
2. The method of claim 1, wherein determining the first portion of subpixels and the second portion of subpixels from the plurality of subpixels comprises:
determining the area where each sub-pixel is located; the display area of the display panel is divided into a first area, a second area and a third area in advance, the first area corresponds to an area where an acquisition device for acquiring the brightness data is located, the second area is located at the edge of the display area of the display panel, and the third area is located between the first area and the second area;
The sub-pixels located in the third region are determined as first partial sub-pixels, and the sub-pixels located in the second region are determined as second partial sub-pixels.
3. The method of claim 1, wherein determining the first portion of subpixels and the second portion of subpixels from the plurality of subpixels comprises:
comparing the first brightness data of each sub-pixel with the corresponding reference brightness data;
the sub-pixels of which the first luminance data is greater than the corresponding reference luminance data are determined as first partial sub-pixels, and the sub-pixels of which the first luminance data is less than the corresponding reference luminance data are determined as second partial sub-pixels.
4. The method of claim 1, wherein determining the first portion of subpixels and the second portion of subpixels from the plurality of subpixels comprises:
determining the area where each sub-pixel is located, and comparing the first brightness data of each sub-pixel with the corresponding reference brightness data; the display area of the display panel is divided into a first area, a second area and a third area in advance, the first area corresponds to an area where an acquisition device for acquiring the brightness data is located, the second area is located at the edge of the display area of the display panel, and the third area is located between the first area and the second area;
Determining a sub-pixel which is positioned in the third area and has first brightness data which is larger than or equal to corresponding reference brightness data and a sub-pixel which is positioned in the first area and has first brightness data which is larger than corresponding reference brightness data as a first part of sub-pixels, and determining a sub-pixel which is positioned in the second area and has first brightness data which is smaller than or equal to corresponding reference brightness data and a sub-pixel which is positioned in the first area and has first brightness data which is smaller than corresponding reference brightness data as a second part of sub-pixels;
calculating difference degree data of sub-pixels which are positioned in the third area and the first brightness data are smaller than the corresponding reference brightness data to obtain first difference degree data, and calculating difference degree data of sub-pixels which are positioned in the second area and the first brightness data are larger than the corresponding reference brightness data to obtain second difference degree data; the difference degree data is an absolute value of a difference value between a ratio of the first brightness data relative to the corresponding reference brightness data and a preset adjustment ratio;
determining the sub-pixels of which the first difference degree data is smaller than preset difference data and the sub-pixels of which the second difference degree data is larger than or equal to the preset difference data as first partial sub-pixels, and determining the sub-pixels of which the first difference degree data is larger than or equal to the preset difference data and the sub-pixels of which the second difference degree data is smaller than the preset difference data as second partial sub-pixels.
5. The method of claim 3 or 4, wherein the reference luminance data corresponding to any one of the sub-pixels includes: the average value of the first luminance data of all the sub-pixels having the same color and displaying the same gray scale as the sub-pixel.
6. The method of claim 1, wherein adjusting the first luminance data of the first portion of subpixels to the second luminance data and the first luminance data of the second portion of subpixels to the third luminance data comprises:
calculating the product of the first brightness data and the first adjustment proportion of the first part of sub-pixels to obtain second brightness data, and calculating the product of the first brightness data and the second adjustment proportion of the second part of sub-pixels to obtain third brightness data; the first adjustment ratio is greater than 1, and the second adjustment ratio is less than 1.
7. The method according to claim 2, wherein the method further comprises:
the sub-pixels located in the first region are determined as third partial sub-pixels, and the first luminance data of the third partial sub-pixels is maintained unchanged.
8. A picture compensation method, comprising:
Acquiring the second luminance data and the third luminance data processed by the preprocessing method of the data to be compensated according to any one of claims 1 to 7;
and calculating the compensation data of the first part of sub-pixels based on the second brightness data, calculating the compensation data of the second part of sub-pixels based on the third brightness data, and compensating the picture to be compensated based on the compensation data.
9. A processing device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program realizing the steps of the pre-processing method of data to be compensated according to any one of claims 1 to 7 or the steps of the picture compensation method according to claim 8 when being executed by the processor.
10. A display device comprising the processing apparatus of claim 9.
CN202310692083.4A 2023-06-12 2023-06-12 Preprocessing method of data to be compensated, picture compensation method and related equipment Pending CN116564226A (en)

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