CN111433841B - Mura compensation method for display panel, computer readable storage medium and display device - Google Patents
Mura compensation method for display panel, computer readable storage medium and display device Download PDFInfo
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Abstract
A Mura compensation method of a display panel, a computer readable medium and a display device are provided, the Mura compensation method of the display panel comprises the following steps: (S100) acquiring the relative brightness value of each sub-pixel of the display panel under a preset gray scale to obtain a relative brightness matrix; (S200) obtaining a relative gray scale matrix through the relative brightness matrix; (S300) obtaining an amplified gray-scale matrix through the relative gray-scale matrix; (S400) obtaining a compensation gray scale through the amplification gray scale matrix; (S500) compensating the display panel according to the compensation gray scale. The Mura compensation method of the display panel enables the compensation of the display panel to be more accurate, the calculation efficiency to be faster, various display panels can be used, and the practicability is higher.
Description
Technical Field
The invention belongs to the technical field of display driving, and particularly relates to a Mura compensation method of a display panel, a computer-readable storage medium and a display device.
Background
An Organic Light-Emitting Diode (OLED) is also called an Organic electroluminescent display or an Organic Light-Emitting semiconductor. The OLED display technology has the advantages of self-luminescence, wide viewing angle, almost infinite contrast, low power consumption, extremely high reaction speed and the like. Mura means spots and stains, and generally means spots and marks of uneven brightness on an OLED display panel or a liquid crystal panel, and the spots and the marks bring uneven feeling to human vision. The Mura defects of the OLED display panel or the liquid crystal panel are from many sources, and are generated from each link of the display panel manufacturing process. The elimination or compensation of the Mura phenomenon is a technical problem that needs to be solved in order to obtain a clearer and more uniform display effect for the OLED display panel or the liquid crystal panel.
Disclosure of Invention
In view of this, the present invention provides a method for effectively and rapidly generating a Mura compensation value, so as to ensure uniform brightness of a display panel and improve the quality of the display panel. The specific technical scheme is as follows.
A Mura compensation method of a display panel comprises the following steps:
acquiring the relative brightness value of each sub-pixel of the display panel under a preset gray scale to obtain a relative brightness matrix;
obtaining a relative gray scale matrix through the relative brightness matrix;
obtaining an amplified gray scale matrix through the relative gray scale matrix;
obtaining a compensation gray scale through the amplified gray scale matrix;
and compensating the display panel according to the compensation gray scale.
Preferably, the "obtaining a relative gray-scale matrix by the relative luminance matrix" includes:
and obtaining a double-type relative gray scale matrix by performing inverse Gamma operation on the relative brightness matrix.
Preferably, the formula of the inverse Gamma operation is as follows:
wherein the gary represents a relative gray scale matrix and the lumiance represents a relative luminance matrix.
Preferably, the "obtaining the amplified grayscale matrix by the relative grayscale matrix" includes:
and amplifying the relative gray scale matrix to a preset gray scale interval, and taking an integer to obtain an amplified gray scale matrix.
Preferably, the method for amplifying the relative gray-scale matrix to the preset gray-scale interval includes:
multiplying the relative gray scale matrix by a magnification factor to magnify the relative gray scale matrix, the magnification factor being greater than 1.
Preferably, the amplifying the relative gray-scale matrix to a preset gray-scale interval includes:
and amplifying the relative gray scale matrix by a preset multiple to amplify the relative gray scale matrix to a preset gray scale interval.
Preferably, the step of amplifying the relative gray-scale matrix by a preset multiple to amplify the relative gray-scale matrix within a preset gray-scale interval includes:
amplifying the relative gray scale matrix to obtain an nth relative gray scale matrix, wherein n is an integer;
obtaining an nth gray scale average value according to each relative gray scale value in the nth relative gray scale matrix;
judging whether the value of the nth gray scale average value is the same as that of the preset gray scale; if the gray scales are the same, the nth relative gray scale matrix is a preset gray scale; if not, the relative gray scale matrix is continuously amplified until the n +1 th gray scale average value of each relative gray scale value in the n +1 th relative gray scale matrix is the same as the value of the preset gray scale.
Preferably, the "obtaining the compensation gray scale by the amplification gray scale matrix" includes:
obtaining a background gray value through the amplified gray matrix;
obtaining a compensation value through the amplified gray scale matrix and the background gray scale value;
and setting a compensation factor, and obtaining a compensation gray scale through the compensation factor and the compensation value.
Preferably, the "obtaining the background gray-scale value by the enlarged gray-scale matrix" includes:
and calculating the background gray value by a statistical method on the basis of the amplified gray-scale matrix.
Preferably, the calculating the background gray-scale value by a statistical method based on the enlarged gray-scale matrix includes:
and calculating the gray value with the highest occurrence frequency in the amplified gray-scale matrix by a statistical method, namely the gray value with the highest occurrence frequency is the background gray value.
Preferably, the "obtaining a compensation value through the amplification gray scale matrix and the background gray scale value" includes:
and subtracting the amplified gray scale matrix from the background gray scale value to obtain the compensation value.
Preferably, the setting method of the compensation factor is a dichotomy.
Preferably, the "and obtaining the compensation gray scale by the compensation factor and the compensation value" includes:
and multiplying the compensation value by the compensation factor to obtain the compensation gray scale.
Preferably, the "compensating the display panel according to the compensation gray scale" includes:
inputting the compensation gray scale to a display panel for displaying;
judging whether the compensated display panel reaches a preset compensation finishing gray scale or not; if the compensation finishing gray scale is not reached, returning to the previous step to reset the compensation factor; and if the compensation finishing gray scale is reached, finishing.
Preferably, the judging whether the compensated display panel reaches a preset compensation finishing gray scale includes:
obtaining a compensation brightness value of each sub-pixel of the display panel after compensation to obtain a compensation brightness matrix;
calculating the brightness value with the highest frequency of occurrence in the compensation brightness matrix through a statistical method according to the compensation brightness matrix to obtain a standard brightness value;
obtaining a first compensation proportion according to the standard brightness value and the compensation brightness matrix;
judging whether the first compensation proportion is larger than a preset proportion or not, and if the first compensation proportion is larger than the preset proportion, indicating that the compensated display panel reaches a preset compensation finishing gray scale; and if the first compensation proportion is smaller than the preset proportion, the compensated display panel does not reach the preset compensation finishing gray scale.
Preferably, the judging whether the compensated display panel reaches a preset compensation finishing gray scale includes:
obtaining a compensation brightness value of each sub-pixel of the display panel after compensation to obtain a compensation brightness matrix;
obtaining a compensation gray-scale matrix through the compensation brightness matrix;
calculating a gray scale value with the highest frequency of occurrence in the compensation gray scale matrix through a statistical method according to the compensation gray scale matrix to obtain a standard gray scale value;
obtaining a second compensation proportion according to the standard gray scale value and the compensation gray scale matrix;
judging whether the second compensation proportion is larger than a preset proportion or not, and if the second compensation proportion is larger than the preset proportion, indicating that the compensated display panel reaches a preset compensation finishing gray scale; and if the first compensation proportion is smaller than the preset proportion, the compensated display panel does not reach the preset compensation finishing gray scale.
The present invention also provides a computer-readable storage medium storing a Mura compensation program for a display panel, wherein the program when executed performs: the display panel Mura compensation method of any one of the above.
The invention also provides a display device, which comprises a memory and a processor, wherein the memory stores a Mura compensation program for a display panel, and the processor reads the Mura compensation program from the memory to execute any one of the Mura compensation methods for the display panel.
The invention has the beneficial effects that: the Mura compensation method of the display panel enables the compensation of the display panel to be more accurate, the calculation efficiency to be higher, the Mura compensation method can be suitable for various display panels, and the practicability is high.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a flowchart of a Mura compensation method for a display panel according to an embodiment of the present invention.
FIG. 2 is a flow chart of "amplifying the relative gray-scale matrix by a predetermined multiple to amplify the relative gray-scale matrix to a predetermined gray-scale interval" according to the present invention.
FIG. 3 is a flow chart of "obtaining a compensation gray scale by the amplified gray scale matrix" according to the present invention.
FIG. 4 is a flowchart of "compensating the display panel according to the compensation gray scale" according to the present invention.
Fig. 5 is a flowchart of a first method for determining whether the compensated display panel reaches a preset compensation ending gray scale according to the present invention.
Fig. 6 is a flowchart of a second method for determining whether the compensated display panel reaches a preset compensation ending gray scale according to the present invention.
Fig. 7 is a schematic view of a display device according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," and the like in the description and in the claims, and in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, an embodiment of the present invention provides a Mura compensation method for a display panel, including steps S100, S200, S300, S400, and S500, and the detailed steps are as follows.
Step S100, obtaining a relative luminance value of each sub-pixel of the display panel at a preset gray scale to obtain a relative luminance matrix.
In step S100, the relative luminance value of each sub-pixel at the preset gray level can be obtained by the luminance obtaining device. The brightness acquiring device includes, but is not limited to, a Charge Coupled Device (CCD) camera. The CCD camera shoots image information of the display panel under a preset gray scale, and then the relative brightness value is obtained according to the image information. The relative brightness value comprises a relative brightness value of each sub-pixel, and a relative brightness matrix is obtained by forming the relative brightness value of each sub-pixel.
The "preset gray scale" in step S100 includes, but is not limited to, any gray scale from 0 to 255, taking the preset gray scale as 80 as an example, i.e. the gray scale of the display panel is set to 80, and then the brightness obtaining device is used to obtain the relative brightness value of each sub-pixel at the 80 gray scale.
And S200, obtaining a relative gray scale matrix through the relative brightness matrix.
In a further embodiment, the step S200 of obtaining the relative gray-scale matrix through the relative luminance matrix is to obtain a double-type relative gray-scale matrix through inverse Gamma operation on the relative luminance matrix. The formula of the inverse Gamma operation is as follows:
wherein the gary represents a relative gray level matrix and the lumiance represents a relative brightnessA degree matrix. Since the luminance values in the relative luminance matrix include a decimal, the value of the relative gray-scale matrix after the inverse Gamma operation is also a decimal and a decimal of a double type, wherein the double type has high representation accuracy.
And step S300, obtaining an amplified gray-scale matrix through the relative gray-scale matrix. The relative gray scale matrix is of a double type, which has a decimal with higher precision. In this step, the precision can be improved by amplifying the relative gray-scale matrix with higher precision and then taking an integer, and the compensation for the display panel is more precise.
In a further embodiment, the obtaining of the amplified gray-scale matrix through the relative gray-scale matrix includes amplifying the relative gray-scale matrix to a preset gray-scale interval, and taking an integer to obtain the amplified gray-scale matrix. The preset gray scale interval refers to an interval range which can enable the mura compensation precision of the display panel to be high and the error to be small. According to different display requirements of various display panels, the preset gray scale interval can be flexibly set to meet the requirements of different display panels.
In a further embodiment, the amplifying method for amplifying the relative gray-scale matrix to the preset gray-scale interval is to multiply the relative gray-scale matrix by an amplification factor to amplify the relative gray-scale matrix, wherein the amplification factor is greater than 1. Preferably, the amplification factor is a numerical value capable of ensuring that the amplified gray-scale matrix is not distorted and data is not lost. If the amplification factor is too small, the data distortion phenomenon can be caused because the relative gray scale matrix is not amplified sufficiently, and if the amplification factor is too large, the data loss phenomenon can be caused because the relative gray scale matrix is amplified excessively. It is understood that the amplification factor may be the same or different for each amplification. Taking the amplification factor as 1.1 as an example, the amplification factor is multiplied by 1.1 every time the relative gray scale matrix is amplified. Or amplifying by the amplification factor of 1.1 for the first time and amplifying by the amplification factor of 1.05 for the second time until the requirements are met.
In a further embodiment, the "amplifying the relative gray-scale matrix to a preset gray-scale interval" may be amplifying the relative gray-scale matrix by a preset multiple to amplify the relative gray-scale matrix to the preset gray-scale interval. The preset multiple refers to the multiple relation between the finally obtained amplified preset gray scale interval and the relative gray scale matrix.
Referring to fig. 2, in a further embodiment, the step of "enlarging the relative gray-scale matrix by a predetermined multiple to enlarge the relative gray-scale matrix within a predetermined gray-scale interval" includes steps S310, S320 and S330. The detailed procedure is as follows.
Step S310, amplifying the relative gray scale matrix to obtain an nth relative gray scale matrix, wherein n is an integer. Preferably, the relative gray-scale matrix is amplified by multiplying the relative gray-scale matrix by an amplification factor. It can be understood that one amplified relative gray scale matrix is obtained every time amplification is performed, that is, the relative gray scale matrix after the first amplification is recorded as the 1 st relative gray scale matrix, and after the amplification factor is adjusted for the nth time, the relative gray scale matrix after the nth amplification is recorded as the nth relative gray scale matrix.
Step S320, obtaining an nth gray scale average value according to each relative gray scale value in the nth relative gray scale matrix. Specifically, each relative gray scale value in the nth relative gray scale matrix is added, and then divided by the counted number to obtain the nth gray scale average value.
Step S330, judging whether the value of the nth gray scale average value is the same as the value of the preset gray scale. If the gray scales are the same, the nth corresponding gray scale matrix is a preset gray scale. If not, the relative gray scale matrix is continuously amplified until the n +1 th gray scale average value of each relative gray scale value in the n +1 th relative gray scale matrix is the same as the value of the preset gray scale. Taking the preset gray scale as 80 as an example, when the average value of the nth gray scale is 80, the nth relative gray scale matrix can be determined as the preset gray scale.
And S400, obtaining a compensation gray scale through the amplification gray scale matrix.
Referring to fig. 3, in a further embodiment, the step of obtaining the compensated gray scale by the enlarged gray scale matrix includes steps S410, S420 and S430. The detailed procedure is as follows.
And step S410, obtaining a background gray value through the amplified gray-scale matrix. The "obtaining the background gray-scale value by the amplified gray-scale matrix" may be based on the amplified gray-scale matrix, and the background gray-scale value is calculated by a statistical method. The step of calculating the background gray value by using the amplified gray-scale matrix as the basis may be a step of calculating a gray value with the highest occurrence frequency in the amplified gray-scale matrix by using a statistical method, that is, the gray value with the highest occurrence frequency is the background gray value. For example, counting the values in the obtained amplified grayscale matrix to obtain the highest frequency of occurrence of the value with the grayscale value of 80, then the grayscale value of 80 is taken as the background grayscale value in this embodiment. Generally, the value of the preset gray level appearing in the display panel is relatively high.
Step S420, obtaining a compensation value through the amplified gray-scale matrix and the background gray-scale value. The "obtaining the compensation value through the amplified gray-scale matrix and the background gray-scale value" may be to subtract the amplified gray-scale matrix from the background gray-scale value to obtain the compensation value.
Step S430, setting a compensation factor, and obtaining a compensation gray scale through the compensation factor and the compensation value. The setting method of the compensation factor may be a dichotomy.
In a further embodiment, the step of obtaining the compensation gray scale through the compensation factor and the compensation value may be to multiply the compensation value by the compensation factor to obtain the compensation gray scale.
And S500, compensating the display panel according to the compensation gray scale.
Referring to FIG. 4, in a further embodiment, the "compensating the display panel according to the compensation gray scale" includes steps S510 and S520. The detailed procedure is as follows.
Step S510, inputting the compensated gray scale to a display panel for displaying. And at the moment, the gray scale displayed by the final display panel is obtained after the defective display panel is superposed and compensated with the gray scale.
Step S520, determining whether the compensated display panel reaches a preset compensation ending gray scale. If the compensation finishing gray scale is not reached, returning to the previous step to reset the compensation factor. And if the compensation finishing gray scale is reached, finishing.
The method of resetting the compensation factor is a dichotomy, which is exemplified below. Assuming that the selectable interval of the compensation factor is 0-1, if the compensation factor is set to 0.5 for the first time in step S430 and the compensation value is offset, the final compensation gray scale is 0.5. Inputting the value of 0.5offset of compensation gray scale to the display panel for compensation, judging whether the display panel after the first compensation reaches the preset end compensation gray scale, if the end compensation gray scale is not reached, returning to the previous step for resetting the compensation factor, and selecting the interval of 0.5-1 when the second dichotomy is adopted because the compensation factor is not reached when the first compensation factor is set to 0.5, and setting the value of the compensation factor for the second time to be the intermediate value of 0.5 and 1, namely setting the second compensation factor to be 0.75. And then continuing to compensate the display panel by using the compensation gray scale of which the second compensation gray scale is offset by 0.75, and if the display panel after the second compensation does not reach the preset end compensation gray scale, continuing to adopt the bisection method and setting a third compensation factor to be 0.875 by using 0.75-1 as a bisection interval. If the compensated display panel is compensated by the compensation gray scale of the second compensation gray scale of 0.75, the compensated display panel is found to exceed the preset end compensation gray scale, the interval of 0.5-0.75 is selected when the compensation factor adopts the dichotomy, and the value of the third compensation factor is set to be 0.625. And so on until the appropriate compensation factor is set.
The calculation speed can be effectively improved by adopting the dichotomy. And the requirements for the display effect are different under different use conditions according to different display panels, and the compensation factors can be flexibly set according to different requirements for the display effect so as to meet and be suitable for different display panels.
Referring to FIG. 5, in a further embodiment, a first method for determining whether the compensated display panel reaches a predetermined compensation ending gray level includes steps S521-I, S522-I, S523-I, and S524-I. The detailed procedure is as follows.
And step S521-I, acquiring the compensated brightness value of each sub-pixel of the display panel after compensation to obtain a compensation brightness matrix.
And S522-I, calculating the brightness value with the highest frequency of occurrence in the compensation brightness matrix by a statistical method according to the compensation brightness matrix to obtain a standard brightness value. The standard brightness value is the brightness value with the highest frequency of occurrence in the compensation brightness matrix.
And S523-I, obtaining a first compensation proportion according to the standard brightness value and the compensation brightness matrix. And counting the number of all the brightness values in the compensation brightness matrix, and recording as A1. And counting the number of the standard brightness values in the compensation brightness matrix, and recording as B1. And dividing the number of the standard brightness values by the number of all the brightness values in the compensation brightness matrix to obtain a ratio B1/A1, wherein the ratio B1/A1 is a first compensation ratio. The higher the first compensation ratio indicates that the distribution of luminance values in the compensated luminance matrix is more concentrated and appears sharper in the luminance distribution curve.
Step 524-I, determining whether the first compensation ratio is greater than a preset ratio, and if the first compensation ratio is greater than the preset ratio, indicating that the compensated display panel reaches a preset compensation finishing gray scale. And if the first compensation proportion is smaller than the preset proportion, the compensated display panel does not reach the preset compensation finishing gray scale. Assuming that the preset proportion of the display panel is 0.95, when the first compensation proportion is greater than 0.95, the display panel reaches a preset end compensation gray scale. And if the first compensation proportion is less than 0.95, the display panel does not reach the preset compensation finishing gray scale. It can be understood that, because different display panels have different requirements on the display effect under different use conditions, the preset ratio can be flexibly set according to the different requirements on the display effect, so as to meet and adapt to different display panels.
Referring to FIG. 6, in a further embodiment, a second method for determining whether the compensated display panel reaches a predetermined compensation ending gray level includes steps S521-II, S522-II, S523-II, S524-II, and S525-II. The detailed procedure is as follows.
And step S521-II, acquiring the compensated brightness value of each sub-pixel of the display panel after compensation to obtain a compensated brightness matrix.
And S522-II, obtaining a compensation gray-scale matrix through the compensation brightness matrix.
And S523-II, calculating a gray scale value with the highest frequency of occurrence in the compensation gray scale matrix by a statistical method according to the compensation gray scale matrix to obtain a standard gray scale value. The standard gray scale value is the gray scale value with the highest occurrence frequency in the compensation gray scale matrix.
And step 524-II, obtaining a second compensation proportion according to the standard gray-scale value and the compensation gray-scale matrix. And counting the number of all gray scale values in the compensation gray scale matrix, and marking as A2. And counting the number of the standard gray scale values in the compensation gray scale matrix, and recording as B2. And dividing the number of the standard gray-scale values by the number of all gray-scale values in the compensation gray-scale matrix to obtain a ratio B2/A2, wherein the ratio B2/A2 is a second compensation proportion. The higher the second compensation ratio is, the more concentrated the gray scale value distribution in the compensation gray scale matrix is, the sharper the gray scale value distribution curve is.
And step S525-II, judging whether the second compensation proportion is larger than a preset proportion, and if the second compensation proportion is larger than the preset proportion, indicating that the compensated display panel reaches a preset compensation finishing gray scale. And if the first compensation proportion is smaller than the preset proportion, the compensated display panel does not reach the preset compensation finishing gray scale. Assuming that the preset ratio of the display panel is 0.95, when the second compensation ratio is greater than 0.95, the display panel reaches a preset end compensation gray scale. And if the second compensation proportion is less than 0.95, the display panel does not reach the preset compensation finishing gray scale. It can be understood that, because different display panels have different requirements on the display effect under different use conditions, the preset ratio can be flexibly set according to the different requirements on the display effect, so as to meet and adapt to different display panels.
The present invention also provides a computer readable storage medium storing a Mura compensation program for a display panel, wherein the program, when executed, performs the display panel Mura compensation method of any one of the above embodiments.
The invention also provides a display device, which comprises a memory and a processor, wherein the memory stores the Mura compensation program for the display panel, and the processor reads the Mura compensation program from the memory to execute the Mura compensation method of the display panel of the embodiment.
Referring to fig. 7, a schematic diagram of a possible structure of the display device according to the above embodiment is provided. The display device 100 includes: memory 101, processor 102, communication interface 103, and bus 104. The processor 102 reads the program from the memory 101 to execute the Mura compensation method of the display panel according to the above embodiment. The memory 101, the processor 102 and the communication interface 103 may be connected to each other through a bus 104; bus 104 may be a peripheral component interconnect standard bus or an extended industry standard architecture bus or the like. The bus 104 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 7, but this is not intended to represent only one bus or type of bus.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory or a random access memory.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are exemplary embodiments and that no single embodiment is necessarily required by the invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module.
The integrated units, if implemented in the form of software program modules and sold or used as stand-alone products, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a memory and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned memory comprises: u disk, ROM, RAM, removable hard disk, magnetic or optical disk, etc. for storing program codes.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash memory disks, read-only memory, random access memory, magnetic or optical disks, and the like.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (14)
1. A Mura compensation method of a display panel is characterized by comprising the following steps:
acquiring the relative brightness value of each sub-pixel of the display panel under a preset gray scale to obtain a relative brightness matrix;
obtaining a double-type relative gray scale matrix through inverse Gamma operation of the relative brightness matrix;
amplifying to a preset gray scale interval through the relative gray scale matrix, and taking an integer to obtain an amplified gray scale matrix;
obtaining a background gray value through the amplified gray matrix;
obtaining a compensation value through the amplified gray scale matrix and the background gray scale value;
setting a compensation factor, and obtaining a compensation gray scale through the compensation factor and the compensation value;
inputting the compensation gray scale to a display panel for displaying;
judging whether the compensated display panel reaches a preset compensation finishing gray scale or not; if the compensation finishing gray scale is not reached, returning to the previous step to reset the compensation factor; and if the compensation finishing gray scale is reached, finishing.
2. The display panel Mura compensation method of claim 1, wherein the inverse Gamma operation has a formula:
wherein the gary represents a relative gray scale matrix and the lumiance represents a relative luminance matrix.
3. The Mura compensation method of claim 1, wherein the enlarging method for enlarging to a preset gray scale interval by the relative gray scale matrix comprises:
multiplying the relative gray scale matrix by a magnification factor to magnify the relative gray scale matrix, the magnification factor being greater than 1.
4. The Mura compensation method of claim 1, wherein the enlarging to a preset gray scale interval by the relative gray scale matrix comprises:
and amplifying the relative gray scale matrix by a preset multiple to amplify the relative gray scale matrix to a preset gray scale interval.
5. The Mura compensation method of claim 4, wherein the step of "magnifying the relative gray scale matrix by a preset multiple to within a preset gray scale interval" comprises:
amplifying the relative gray scale matrix to obtain an nth relative gray scale matrix, wherein n is an integer;
obtaining an nth gray scale average value according to each relative gray scale value in the nth relative gray scale matrix;
judging whether the value of the nth gray scale average value is the same as that of the preset gray scale; if the gray scales are the same, the nth relative gray scale matrix is a preset gray scale; if not, the relative gray scale matrix is continuously amplified until the n +1 th gray scale average value of each relative gray scale value in the n +1 th relative gray scale matrix is the same as the value of the preset gray scale.
6. The Mura compensation method for display panel of claim 1, wherein the obtaining the background gray level value by the enlarged gray level matrix comprises:
and calculating the background gray value by a statistical method on the basis of the amplified gray-scale matrix.
7. The Mura compensation method of claim 6, wherein the calculating the background gray level value by a statistical method based on the enlarged gray level matrix comprises:
and calculating the gray value with the highest occurrence frequency in the amplified gray-scale matrix by a statistical method, namely the gray value with the highest occurrence frequency is the background gray value.
8. The Mura compensation method for display panel of claim 1, wherein the obtaining the compensation value through the enlarged gray scale matrix and the background gray scale value comprises:
and subtracting the amplified gray scale matrix from the background gray scale value to obtain the compensation value.
9. The display panel Mura compensation method of claim 1, wherein the compensation factor is set by a dichotomy.
10. The Mura compensation method of claim 1, wherein the step of obtaining the compensated gray scale by the compensation factor and the compensation value comprises:
and multiplying the compensation value by the compensation factor to obtain the compensation gray scale.
11. The Mura compensation method of claim 1, wherein the determining whether the compensated display panel reaches a preset end compensation gray level comprises:
obtaining a compensation brightness value of each sub-pixel of the display panel after compensation to obtain a compensation brightness matrix;
calculating the brightness value with the highest frequency of occurrence in the compensation brightness matrix through a statistical method according to the compensation brightness matrix to obtain a standard brightness value;
obtaining a first compensation proportion according to the standard brightness value and the compensation brightness matrix;
judging whether the first compensation proportion is larger than a preset proportion or not, and if the first compensation proportion is larger than the preset proportion, indicating that the compensated display panel reaches a preset compensation finishing gray scale; and if the first compensation proportion is smaller than the preset proportion, the compensated display panel does not reach the preset compensation finishing gray scale.
12. The Mura compensation method of claim 1, wherein the determining whether the compensated display panel reaches a preset end compensation gray level comprises:
obtaining a compensation brightness value of each sub-pixel of the display panel after compensation to obtain a compensation brightness matrix;
obtaining a compensation gray-scale matrix through the compensation brightness matrix;
calculating a gray scale value with the highest frequency of occurrence in the compensation gray scale matrix through a statistical method according to the compensation gray scale matrix to obtain a standard gray scale value;
obtaining a second compensation proportion according to the standard gray scale value and the compensation gray scale matrix;
judging whether the second compensation proportion is larger than a preset proportion or not, and if the second compensation proportion is larger than the preset proportion, indicating that the compensated display panel reaches a preset compensation finishing gray scale; and if the second compensation proportion is smaller than the preset proportion, the compensated display panel does not reach the preset compensation finishing gray scale.
13. A computer-readable storage medium storing a Mura compensation program for a display panel, wherein the program when executed performs: a display panel Mura compensation method according to any one of claims 1 to 12.
14. A display device, comprising a memory storing a Mura compensation program for a display panel and a processor reading the Mura compensation program from the memory to perform the Mura compensation method of the display panel according to any one of claims 1 to 12.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/115723 WO2019113791A1 (en) | 2017-12-12 | 2017-12-12 | Method, computer readable storage medium, and display device for display panel mura compensation |
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| CN111433841B true CN111433841B (en) | 2021-06-11 |
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| US10666292B2 (en) * | 2017-11-02 | 2020-05-26 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Compressing method of a grayscale compensation table of an OLED display panel |
| CN108877740B (en) | 2018-07-25 | 2020-09-22 | 昆山国显光电有限公司 | Method and device for acquiring Mura compensation data, computer equipment and storage medium |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101315745A (en) * | 2007-05-28 | 2008-12-03 | 统宝光电股份有限公司 | Image display system and its moire defect elimination method |
| CN103680449A (en) * | 2013-12-17 | 2014-03-26 | Tcl集团股份有限公司 | Method and device for removing liquid crystal displayer mura |
| CN106097954A (en) * | 2016-07-21 | 2016-11-09 | 武汉精测电子技术股份有限公司 | A kind of method and system repairing plane display module Mura defect |
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| US20100013750A1 (en) * | 2008-07-18 | 2010-01-21 | Sharp Laboratories Of America, Inc. | Correction of visible mura distortions in displays using filtered mura reduction and backlight control |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315745A (en) * | 2007-05-28 | 2008-12-03 | 统宝光电股份有限公司 | Image display system and its moire defect elimination method |
| CN103680449A (en) * | 2013-12-17 | 2014-03-26 | Tcl集团股份有限公司 | Method and device for removing liquid crystal displayer mura |
| CN106097954A (en) * | 2016-07-21 | 2016-11-09 | 武汉精测电子技术股份有限公司 | A kind of method and system repairing plane display module Mura defect |
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