CN110648627B - Mura phenomenon compensation method, compensation device, display device and electronic equipment - Google Patents
Mura phenomenon compensation method, compensation device, display device and electronic equipment Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—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]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
Abstract
The invention discloses a Mura phenomenon compensation method, a compensation device, a display device and electronic equipment. The method comprises the following steps: acquiring an input gray-scale value of each pixel; remapping the input gray scale values of the pixels, and reducing all the input gray scale values to obtain remapped gray scale values; and calculating compensation parameters by a Demura compensation method, and performing Mura compensation on each pixel based on the remapping gray-scale values. The Mura phenomenon compensation method, the compensation device, the display device and the electronic equipment can better compensate high-gray-scale pictures and avoid gray-scale confusion.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a Mura phenomenon compensation method, a compensation apparatus, a display apparatus, and an electronic device.
Background
An OLED (Organic Light-Emitting Diode) has been increasingly used in high-performance display as a current type Light-Emitting device. Because of its self-luminous property, it possesses the advantages of high contrast, ultralight and thin, and can be bent, etc. compared with LCD display technology.
Mura is a common undesirable phenomenon in OLED display technology, and is mainly caused by the characteristic difference of each TFT due to the immaturity of the TFT process. Demura is a compensation method aiming at mura defect and is divided into internal compensation and external compensation: the internal compensation adopts the characteristic difference of the compensation pixel circuit to the compensation TFT; the external compensation detects the difference of each pixel by optical or electrical means and compensates it by changing the driving voltage.
At present, the commonly adopted Demura compensation method is to shoot a plurality of gray-scale pictures by a high-resolution and high-precision CCD camera, further analyze and display the color distribution characteristics of pixels in the pictures according to data collected by the camera, and identify Mura according to an algorithm; and generating Demura data according to a corresponding Demura compensation algorithm of the Mura data level, namely performing Mura compensation on the Mura compensation data.
However, the inventor of the present application has found that when the conventional Demura compensation method is used for compensation, if the frame is a high gray scale frame, for example, a pixel itself is close to the 255 gray scale, the compensated gray scale value may exceed the 255 gray scale, and for these data, the conventional algorithm is uniformly used as the 255 gray scale processing, and the compensation method does not achieve a good compensation effect, and even a gray scale confusion phenomenon may occur.
Disclosure of Invention
In view of the above, an embodiment of the invention provides a Mura compensation method, a compensation device, a display device and an electronic apparatus, which can better compensate a high gray scale image and avoid the occurrence of gray scale aliasing.
In view of the above object, a first aspect of an embodiment of the present invention provides a Mura phenomenon compensation method, including:
acquiring an input gray-scale value of each pixel;
remapping the input gray scale values of the pixels, and reducing all the input gray scale values to obtain remapped gray scale values;
and calculating compensation parameters by a Demura compensation method, and performing Mura compensation on each pixel based on the remapping gray-scale values.
Optionally, the reducing all the input gray-scale values to obtain remapped gray-scale values includes:
and according to a preset proportional parameter, reducing all the input gray scale values in an equal proportion to obtain the remapped gray scale values, wherein the proportional parameter is less than 1.
Optionally, the obtaining the remapped gray scale value by scaling down all the input gray scale values in equal proportion further includes: increasing the number of bits of the number of data bits to represent the fractional portion of the remapped grayscale value.
Optionally, the method for obtaining the proportional parameter includes:
calculating the brightness difference value of the first pixel and the second pixel;
calculating a difference m of input gray-scale values of the first pixel and the second pixel according to the brightness value difference;
a scaling parameter, Remap, is calculated, where Remap ═ n-m)/n, where n represents the highest grayscale value.
Optionally, an algorithm formula of the Demura compensation method is as follows:
Gray_out＝Gray_in*Remap*Gain+Offset
wherein, Gray _ out represents an output Gray level value, Gray _ in represents an input Gray level value, Remap represents a proportional parameter, Gray _ in × Remap represents a Remap Gray level value obtained by remapping the input Gray level value, Gray represents a compensation multiple, and Offset represents a compensation amount.
Optionally, the reducing all the input gray-scale values to obtain remapped gray-scale values further includes:
and converting the input gray scale value into the remapped gray scale value according to a preset comparison table, wherein the digit of the data bit number of the remapped gray scale value is greater than the digit of the data bit number of the input gray scale value.
Optionally, when converting the input gray scale value into the remapped gray scale value, the method further includes: the highest gray scale of the remapping gray scale is smaller than the full gray scale, and the lowest gray scale value of the remapping gray scale is larger than 0 gray scale.
A second aspect of an embodiment of the present invention provides a Mura phenomenon compensation apparatus, including:
the acquisition module is used for acquiring the input gray-scale value of each pixel;
a remapping module, configured to remap the input gray-scale values of the pixels, and reduce all the input gray-scale values to obtain remapped gray-scale values;
the compensation module is used for calculating compensation parameters through a Demura compensation method and performing Mura compensation on each pixel based on the remapping gray-scale values;
optionally, the remapping module is further configured to implement: and according to a preset proportional parameter, reducing all the input gray scale values in an equal proportion to obtain the remapped gray scale values, wherein the proportional parameter is less than 1.
Optionally, the method for obtaining the proportional parameter includes:
calculating the brightness difference value of the first pixel and the second pixel;
calculating a difference m of input gray-scale values of the first pixel and the second pixel according to the brightness value difference;
a scaling parameter, Remap, is calculated, where Remap ═ n-m)/n, where n represents the highest grayscale value.
Optionally, an algorithm formula of the Demura compensation method is as follows:
Gray_out＝Gray_in*Remap*Gain+Offset
wherein, Gray _ out represents an output Gray level value, Gray _ in represents an input Gray level value, Remap represents a proportional parameter, Gray _ in × Remap represents a Remap Gray level value obtained by remapping the input Gray level value, Gray represents a compensation multiple, and Offset represents a compensation amount.
Optionally, the remapping module is further configured to implement: and converting the input gray scale value into the remapped gray scale value according to a preset comparison table, wherein the digit of the data bit number of the remapped gray scale value is greater than the digit of the data bit number of the input gray scale value.
A third aspect of an embodiment of the present invention provides a display apparatus comprising a Mura phenomenon compensation apparatus as claimed in any one of the preceding claims.
A fourth aspect of an embodiment of the present invention provides an electronic device, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the Mura phenomenon compensation method according to any one of the preceding claims.
As can be seen from the above, the Mura phenomenon compensation method, the compensation device, the display device and the electronic device provided by the present invention reduce all the input gray scale values, so that the gray scale values of the high gray scale pixels which are already close to the full gray scale value can be reduced, the gray scale difference between the high gray scale pixels and the full gray scale value is increased, and more space is reserved for the next Mura compensation. Therefore, the probability that the high-gray-scale pixels become full gray-scale values after compensation can be greatly reduced or even eliminated, so that the pixels with originally distinguished gray-scale values still have distinction after compensation, the phenomenon that gray scales are overlapped in a high-gray-scale area and then are mixed up is avoided, and the Mura compensation effect is improved.
Drawings
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1a is a schematic diagram illustrating a gray level agglomeration phenomenon;
FIG. 1b is a schematic diagram illustrating a gray level non-agglomeration phenomenon;
FIG. 2 is a flow chart of a Mura phenomenon compensation method according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a comparison of normalized luminance between the compensation method of the present application and the conventional compensation method;
FIG. 4 is a schematic illustration of a remapping for a scale parameter of 239/255 according to an embodiment of the invention;
FIG. 5 is a preset look-up table according to an embodiment of the present invention;
FIG. 6 is a schematic flow chart illustrating a compensation method according to an embodiment of the present invention;
FIG. 7a is a table of uniformity test data for Mura compensation without remapping;
FIG. 7b is a table of uniformity test data for Mura compensation after remapping according to an embodiment of the present invention;
FIG. 8a is a schematic diagram illustrating the effect of no compensation;
FIG. 8b is a schematic diagram illustrating the effect of only using the Demura compensation method for compensation;
FIG. 8c is a schematic diagram illustrating the compensation effect of the compensation method according to the embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a Mura phenomenon compensation apparatus according to an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The essence of the Demura compensation method is to compensate the brightness non-uniformity caused by the TFT process level by changing the size of the gray data (gray data). However, the inventor of the present application found that, taking the data of 1-255 grayscales as an example, for a high grayscale image, the grayscale values of some pixels already approach 255 grayscales, for example, the grayscale values of 245 grayscales and 255 grayscales are 255 grayscales after compensation, and it is impossible to distinguish between bright and dark areas, as shown in fig. 1a and 1b, in this case, the data compensated by the compensation parameter may exceed 255 grayscales. However, since the 255 gray level is already the maximum value of the gray data, the current algorithm treats these pixels as 255 gray levels collectively. However, for some pixels with different original gray scale values and high gray scale values, the compensated gray scale values are all 255 gray scales, and the compensated gray scale values are indistinguishable, so that the high gray scale image may have gray scale confusion and gray scale agglomeration after compensation, and the compensation effect is poor.
It can be seen that the conventional Demura compensation method cannot effectively compensate the high gray scale pixels, so that Mura compensation of the OLED display panel cannot be effectively realized.
For the above reasons, a first aspect of the embodiments of the present invention provides a Mura phenomenon compensation method, as shown in fig. 2, the method including:
And 103, calculating compensation parameters by a Demura compensation method, and performing Mura compensation on each pixel based on the remapping gray-scale values.
According to the Mura phenomenon compensation method, all input gray-scale values are reduced, so that the gray-scale values of the high-gray-scale pixels which are close to the full gray-scale values originally can be reduced, the gray-scale difference between the high-gray-scale pixels and the full gray-scale values is increased, and more space is reserved for the next Mura compensation. Therefore, the probability that the high-gray-scale pixels become full gray-scale values after compensation can be greatly reduced or even eliminated, so that the pixels with originally distinguished gray-scale values still have distinction after compensation, the phenomenon that gray scales are overlapped in a high-gray-scale area and then are mixed up is avoided, and the Mura compensation effect is improved.
As shown in FIG. 3, in the high gray level pixel region of the 240-255 gray level, the normalized luminance of the non-remapped portion is very close, and the region is very easy to have the phenomenon of gray level overlap, further causing gray level confusion; the remapped areas have obvious difference in normalized brightness, the gray scales of the areas are not overlapped, and meanwhile, enough space is reserved for the next Mura compensation.
In some optional embodiments, the scaling down all of the input gray scale values to obtain remapped gray scale values in step 102 includes: and according to a preset proportional parameter, reducing all the initial gray scale values in an equal proportion to obtain the remapped gray scale values, wherein the proportional parameter is less than 1. In this embodiment, after all the input gray scale values are obtained, the input gray scale values are reduced according to preset proportional parameters to obtain remap gray scale values, so that after the input gray scale values which are originally close to the full gray scale values are reduced, the difference between the input gray scale values and the full gray scale values is further increased, and a sufficient space is reserved for performing Mura compensation by using a Demura compensation method subsequently, so that the gray scale values of pixels with different gray scale values before compensation are still different after Mura compensation, thereby avoiding the gray scale confusion phenomenon, and having a better compensation effect compared with the existing Demura compensation method.
Optionally, the obtaining the remapped gray scale value by scaling down all the input gray scale values in equal proportion further includes: increasing the number of bits of the number of data bits to represent the fractional portion of the remapped grayscale value. The remapped gray scale value obtained by scaling down the input gray scale value according to the preset scale parameter may have a decimal, for example, for 0-255 gray scales, the number of bits of the data of the input gray scale value is 8 bits, and after the remapped gray scale value is multiplied by the scale parameter smaller than 1, a decimal part may exist, and at this time, if the 8 bits are still used for representing, the decimal part needs to be deleted, which still may cause that part of pixels with different input gray scale values originally have the same remapped gray scale value after remapping, so that in order to ensure the precision of the data, the number of bits of the data is increased to represent the decimal part of the remapped gray scale value, for example, 2 bits are increased to represent the decimal part of the remapped gray scale value, thereby ensuring that the occurrence of the gray scale confusion phenomenon is avoided.
In other alternative embodiments, the scaling parameter may be a predetermined parameter, and in a specific embodiment, as shown in FIG. 4, when 256 gray scale data having a gray scale value of 8 bits is inputted, the scaling parameter Remap is set to 239/255. Thus, after remapping, Demura compensation is carried out, and the output gray level value does not exceed 255, so that the gray level condensation phenomenon caused by Demura compensation can be avoided, and meanwhile, the Uniformity (LRU) of the gray level condensation phenomenon is improved.
Optionally, the method for obtaining the proportional parameter may also include:
step 201, calculating a luminance difference between the first pixel and the second pixel. In a specific embodiment, the first pixel may be a pixel located in a central region of the screen, the second pixel may be a pixel with a lowest luminance value, the luminance values of the first pixel and the second pixel are obtained, and a difference value of the luminance values is taken as a luminance value difference value.
Step 202, calculating a difference m between the input gray-scale values of the first pixel and the second pixel according to the difference between the luminance values. And calculating the difference m of the input gray-scale values of the first pixel and the second pixel according to the corresponding relation between the brightness value and the gray-scale value.
In step 203, a scaling parameter Remap is calculated, where Remap ═ n-m)/n, where n represents the highest grayscale value. When the input gray level is 256 gray levels, the highest gray level n is 255, i.e., Remap is (255-m)/255.
In this embodiment, the first pixel and the second pixel are not limited to the pixel located in the central area of the screen and the pixel with the lowest brightness value, and other pixels may be selected according to the requirement to calculate the brightness value difference, for example, two pixels with the highest and the lowest brightness values may be selected, or the pixels in the preset area may be selected. In addition, the range of the proportion parameter Remap can be flexibly selected according to the characteristics of different products, so that the actual requirements of different products can be met, the optimal compensation effect of each product can be achieved, and the display quality of the display panel and the production yield of a production line are improved.
Optionally, the formula of the Demura compensation method in step 103 is as follows:
Gray_out＝Gray_in*Remap*Gain+Offset
wherein, Gray _ out represents an output Gray level value, Gray _ in represents an input Gray level value, Remap represents a proportional parameter, Gray _ in × Remap represents a Remap Gray level value obtained by remapping the input Gray level value, Gray represents a compensation multiple, and Offset represents a compensation amount.
After remapping the input gray scale value, performing Mura compensation by using a Demura compensation method, specifically comprising: and (3) using a high-precision and high-resolution CCD camera to photograph the display screen, obtaining a picture, obtaining Mura data after certain processing, and calculating compensation parameters through a Demura algorithm. And then, compensating the display data by adopting the calculated compensation parameters to finally achieve the compensation effect of demura, so that the image quality display is better, uniform and real.
In other optional embodiments, the scaling down all of the input gray scale values to obtain remapped gray scale values in step 102 further includes: converting the input gray scale value into the remapped gray scale value according to a preset comparison table, wherein the number of bits of the remapped gray scale value is greater than the number of bits of the input gray scale value; meanwhile, the highest gray scale of the order remapping gray scale is smaller than the full gray scale, and the lowest gray scale value of the remapping gray scale is larger than 0 gray scale. As shown in fig. 5, which is a preset mapping table according to the embodiment of the present invention, the Input Gray level value (Input Gray) of the Gray levels 0-255 is remapped to the remapped Gray level value of 12 bits of the Gray levels 132-3956. In the present embodiment, the lowest gray scale value 0 gray scale of the 8-bit gray scales is not directly mapped to the 0 gray scale of the 12-bit gray scales, but mapped to the 132 gray scale; similarly, the 255 gray scale is not directly remapped to the 4095 gray scale, but remapped to the 3956 gray scale, so that a certain space is reserved in the highest gray scale region and the lowest gray scale region for subsequent Mura compensation by using a Demura compensation method, and the phenomenon of gray scale confusion caused by the fact that all high gray scale pixels in the compensated output gray scale value are full gray scale values is avoided. Optionally, the input gray scale value may also be remapped to a gray scale with other bits according to the comparison table, which is not limited to 12 bits, and the specific remapping relationship is not limited to that shown in fig. 5, and the remapping relationship may also be adjusted according to actual needs.
In the above embodiment, the input gray scale value may be remapped by a software method, and the remapped data is input to the IC for processing; the data remapping may be directly added to the IC and the remapping may be directly performed in the IC. As shown in fig. 5, in a specific embodiment, an input gray scale value of 10 bits is remapped to be a remapped gray scale value of 12 bits, then Mura compensation is performed by using a Demura compensation method, and then 12 bits of data are processed by using methods such as Spatial Dither (Spatial Dither), Frame Rate Control (FRC), or Truncation (Truncation), so as to obtain 8 bits of gray scale data required by the system.
FIGS. 7a and 7b are graphs comparing uniformity test data for Mura compensation using the Demura compensation method. The horizontal columns represent different display screens with serial numbers of 28-35, the vertical columns represent P1-P9 pixels on the same display screen, and data in the table represent brightness values. Fig. 7a is test data of the Mura compensation directly performed by the Demura compensation method, and fig. 7b is test data of the Mura compensation performed by the Demura compensation method after remapping by the compensation method of the present invention. The comparison of the two results shows that the uniformity of the compensation method is 80% -87% without the compensation method, but the uniformity of the compensation method can reach 95% -97% after the compensation method is adopted, and therefore the Mura phenomenon compensation method can greatly improve the uniformity of the brightness of the display screen and provide better display effect for users.
Fig. 8a is a display screen without Demura compensation, fig. 8b is a display screen with only Demura compensation, and fig. 8c is a display screen with compensation by the compensation method of the present invention.
A second aspect of an embodiment of the present invention provides a Mura phenomenon compensation apparatus, as shown in fig. 9, the apparatus including:
and the obtaining module 11 is configured to obtain an input gray-scale value of each pixel.
A remapping module 12, configured to remap the input gray-scale values of the pixels, and reduce all the input gray-scale values to obtain remapped gray-scale values.
And the compensation module 13 is used for calculating compensation parameters by a Demura compensation method and performing Mura compensation on each pixel based on the remapping gray-scale values.
Optionally, the remapping module 12 is further configured to: and according to a preset proportional parameter, reducing all the input gray scale values in an equal proportion to obtain the remapped gray scale values, wherein the proportional parameter is less than 1. Therefore, after the input gray scale value which is originally close to the full gray scale value is reduced, the difference value between the input gray scale value and the full gray scale value is further increased, and enough space is reserved for the subsequent Mura compensation by adopting a Demura compensation method, so that the gray scale values of pixels with different gray scale values before compensation are still different after the Mura compensation is carried out, and the phenomenon of gray scale confusion is avoided.
Wherein, the remapping module 12 is further configured to implement, when all the input gray-scale values are reduced in equal proportion to obtain the remapping gray-scale value: increasing the number of bits of the data bits to represent the fractional part of the remapped gray-scale value, thereby ensuring the precision of the data and improving the compensation effect.
Optionally, the method for obtaining the proportional parameter in the remapping module 12 includes:
calculating the brightness difference value of the first pixel and the second pixel;
calculating a difference m of input gray-scale values of the first pixel and the second pixel according to the brightness value difference;
a scaling parameter, Remap, is calculated, where Remap ═ n-m)/n, where n represents the highest grayscale value. When the input gray level is 256 gray levels, the highest gray level n is 255, i.e., Remap is (255-m)/255.
Optionally, the arithmetic formula of the Demura compensation method in the compensation module 13 is as follows:
Gray_out＝Gray_in*Remap*Gain+Offset
wherein, Gray _ out represents an output Gray level value, Gray _ in represents an input Gray level value, Remap represents a proportional parameter, Gray _ in × Remap represents a Remap Gray level value obtained by remapping the input Gray level value, Gray represents a compensation multiple, and Offset represents a compensation amount.
Optionally, the reducing all the input gray-scale values in the remapping module 12 to obtain the remapped gray-scale values further includes: and converting the input gray scale value into the remapped gray scale value according to a preset comparison table, wherein the digit of the data bit number of the remapped gray scale value is greater than the digit of the data bit number of the input gray scale value. Wherein, when converting the input gray scale value into the remapped gray scale value, the method further comprises: the maximum gray scale of the remapping gray scale is smaller than the full gray scale, and the minimum gray scale value of the remapping gray scale is larger than 0 gray scale, so that certain space is reserved in the maximum gray scale region and the minimum gray scale region for subsequent Mura compensation by adopting a Demura compensation method, and the phenomenon of gray scale confusion caused by the fact that all high gray scale pixels in the compensated output gray scale value are full gray scale values is avoided.
The apparatus of the foregoing embodiment is used to implement the corresponding method in the foregoing embodiment, and has the same beneficial effects as the corresponding method embodiment, which are not described herein again.
A third aspect of the embodiments of the invention provides a display apparatus, as shown in fig. 10, the display apparatus 400 includes the Mura phenomenon compensation apparatus 300 according to any of the embodiments, and further includes a controller 401 (e.g., a timing controller T-con), a data driver 402, a gate driver 403, and a display panel 404. For example, the compensation device 300 is disposed in the controller 401, and outputs the compensated display data signal to the data driver 402 under the control of the controller 401.
A fourth aspect of the embodiments of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the Mura phenomenon compensation method as described in any of the above when executing the program. Fig. 11 is a schematic diagram of a hardware structure of an embodiment of the apparatus for performing the Mura phenomenon compensation method according to the present invention.
As shown in fig. 11, the apparatus includes:
one or more processors 901 and a memory 902, where one processor 901 is taken as an example in fig. 11.
The apparatus for performing the data recommendation method may further include: an input device 903 and an output device 904.
The processor 901, the memory 902, the input device 903 and the output device 904 may be connected by a bus or other means, and fig. 11 illustrates the connection by a bus as an example.
The memory 902, which is a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the Mura phenomenon compensation method in the embodiment of the present application (for example, the obtaining module 11, the remapping module 12, and the compensation module 13 shown in fig. 9). The processor 901 executes various functional applications of the server and data processing, i.e., implements the Mura phenomenon compensation method of the above-described method embodiment, by running the non-volatile software program, instructions, and modules stored in the memory 1002.
The memory 902 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the Mura phenomenon compensation apparatus, and the like. Further, the memory 902 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, memory 902 may optionally include memory located remotely from processor 901, which may be connected to the member user behavior monitoring device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 903 may receive input numeric or character information and generate key signal inputs related to user settings and function control of the Mura phenomenon compensation device. The output device 904 may include a display device such as a display screen.
The one or more modules are stored in the memory 902 and, when executed by the one or more processors 901, perform the Mura phenomenon compensation method of any of the method embodiments described above. The technical effect of the embodiment of the device for executing the Mura phenomenon compensation method is the same as or similar to that of any method embodiment.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (12)
1. A Mura phenomenon compensation method, comprising:
acquiring an input gray-scale value of each pixel;
remapping the input gray scale values of the pixels, and reducing all the input gray scale values to obtain remapped gray scale values;
calculating compensation parameters by a Demura compensation method, and performing Mura compensation on each pixel based on the remapping gray-scale values;
the reducing all of the input gray scale values to obtain remapped gray scale values comprises: according to a preset proportion parameter, reducing all the input gray scale values in an equal proportion to obtain the remapped gray scale values;
the method for acquiring the proportional parameters comprises the following steps: calculating the brightness difference value of the first pixel and the second pixel; calculating a difference m of input gray-scale values of the first pixel and the second pixel according to the brightness value difference; a scaling parameter, Remap, is calculated, Remap = (n-m)/n, where n represents the highest grayscale value.
2. The method of claim 1, wherein the scaling parameter is less than 1.
3. The method of claim 2, wherein scaling all of the input gray scale values down to obtain the remapped gray scale values further comprises: increasing the number of bits of the number of data bits to represent the fractional portion of the remapped grayscale value.
4. The method of claim 1, wherein the Demura compensation method has an algorithm formula of:
Gray_out=Gray_in*Remap*Gain+Offset
wherein, Gray _ out represents an output Gray level value, Gray _ in represents an input Gray level value, Remap represents a proportional parameter, Gray _ in × Remap represents a Remap Gray level value obtained by remapping the input Gray level value, Gray represents a compensation multiple, and Offset represents a compensation amount.
5. The method of claim 1, wherein the scaling down all of the input grayscale values to obtain remapped grayscale values further comprises:
and converting the input gray scale value into the remapped gray scale value according to a preset comparison table, wherein the digit of the data bit number of the remapped gray scale value is greater than the digit of the data bit number of the input gray scale value.
6. The method of claim 5, wherein converting the input gray scale value to the remapped gray scale value further comprises: the highest gray scale of the remapping gray scale is smaller than the full gray scale, and the lowest gray scale value of the remapping gray scale is larger than 0 gray scale.
7. A Mura phenomenon compensation apparatus, comprising:
the acquisition module is used for acquiring the input gray-scale value of each pixel;
a remapping module, configured to remap the input gray-scale values of the pixels, and reduce all the input gray-scale values to obtain remapped gray-scale values;
the compensation module is used for calculating compensation parameters through a Demura compensation method and performing Mura compensation on each pixel based on the remapping gray-scale values;
the remapping module is further configured to implement: according to a preset proportion parameter, reducing all the input gray scale values in an equal proportion to obtain the remapped gray scale values;
the method for acquiring the proportional parameters comprises the following steps: calculating the brightness difference value of the first pixel and the second pixel; calculating a difference m of input gray-scale values of the first pixel and the second pixel according to the brightness value difference; a scaling parameter, Remap, is calculated, Remap = (n-m)/n, where n represents the highest grayscale value.
8. The apparatus of claim 7, wherein the scaling parameter is less than 1.
9. The apparatus of claim 7, wherein the Demura compensation method has an algorithm formula of:
Gray_out=Gray_in*Remap*Gain+Offset
wherein, Gray _ out represents an output Gray level value, Gray _ in represents an input Gray level value, Remap represents a proportional parameter, Gray _ in × Remap represents a Remap Gray level value obtained by remapping the input Gray level value, Gray represents a compensation multiple, and Offset represents a compensation amount.
10. The apparatus of claim 7, wherein the remapping module is further configured to implement: and converting the input gray scale value into the remapped gray scale value according to a preset comparison table, wherein the digit of the data bit number of the remapped gray scale value is greater than the digit of the data bit number of the input gray scale value.
11. A display device comprising a Mura phenomenon compensation device according to any one of claims 7 to 10.
12. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the Mura phenomenon compensation method according to any one of claims 1-6 when executing the program.
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| CN113140186B (en) * | 2021-04-22 | 2022-11-01 | 武汉华星光电半导体显示技术有限公司 | Display panel compensation method and display device |
| CN113160090B (en) * | 2021-05-14 | 2024-01-09 | 深圳精智达技术股份有限公司 | Image correction method and device |
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| CN114639346B (en) * | 2022-04-20 | 2023-07-21 | 武汉天马微电子有限公司 | Mura compensation method, apparatus, device, storage medium and computer program product |
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