CN112331124B - Display compensation method of display panel, display panel and display device - Google Patents
Display compensation method of display panel, display panel and display device Download PDFInfo
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Abstract
The embodiment of the invention discloses a display compensation method of a display panel, the display panel and a display device, wherein the display compensation method of the display panel comprises the steps of acquiring the current first refresh frequency of the display panel when the display panel displays a picture; acquiring a refresh frequency switching instruction, and calling corresponding transition compensation data according to the refresh frequency switching instruction and the first refresh frequency; and switching the refreshing frequency of the display panel, and compensating the display picture in the switching process by using the corresponding transition compensation data in the switching process. The technical scheme provided by the embodiment of the invention adopts the transition compensation data to perform frequency compensation when the refresh frequency is switched, thereby solving the problem of uneven display of the existing display device.
Description
Technical Field
The embodiment of the invention relates to the technical field of display panels, in particular to a display compensation method of a display panel, the display panel and a display device.
Background
With the development of display technology and the improvement of living standard of people, display devices are widely used, however, the existing display devices have the problem of uneven display.
Disclosure of Invention
The embodiment of the invention provides a display compensation method of a display panel, the display panel and a display device, and aims to solve the problem of uneven display of the conventional display device.
In order to realize the technical problem, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a display compensation method for a display panel, including:
when the display panel displays a picture, acquiring a current first refreshing frequency of the display panel;
acquiring a refresh frequency switching instruction, and calling corresponding transition compensation data according to the refresh frequency switching instruction and the first refresh frequency;
and switching the refreshing frequency of the display panel, and compensating the display picture in the switching process by using the corresponding transition compensation data in the switching process.
Further, when the display panel displays a picture, the step of acquiring the current first refresh frequency of the display panel further includes:
determining corresponding first refreshing compensation data according to the first refreshing frequency to compensate the display frame;
before the step of obtaining the current first refresh frequency of the display panel, the method further includes:
and when the display panel displays a picture by adopting a first refreshing frequency, pre-loading the transitional compensation data into a compensation module.
Further, after the refresh frequency of the display panel is switched, a second refresh frequency of the display panel is obtained, and corresponding second refresh compensation data is called according to the second refresh frequency to compensate the display frame.
Further, the first refresh compensation data is obtained by averaging the sub-refresh compensation data corresponding to each sub-pixel of the display panel at the first refresh frequency;
the second refresh compensation data is obtained by averaging the sub-refresh compensation data corresponding to each sub-pixel of the display panel at the second refresh frequency.
Further, the transition compensation data is determined by a mean of the first refresh compensation data and the second refresh compensation data.
Further, the first refresh frequency and the second refresh frequency are any one of 30Hz, 60Hz, 90Hz, 120Hz, or 144Hz and the first refresh frequency and the second refresh frequency are different.
In a second aspect, an embodiment of the present invention provides a display panel, including:
the frequency acquisition module is used for acquiring a current first refreshing frequency of the display panel when the display panel displays a picture;
the data calling module is used for acquiring a refresh frequency switching instruction and calling corresponding transition compensation data according to the refresh frequency switching instruction and the first refresh frequency;
the driving chip comprises a switching module and a compensation module, the switching module is used for switching the refreshing frequency of the display panel, and the compensation module is used for compensating the display picture in the switching process by using the corresponding transition compensation data in the switching process.
Further, the compensation module is further configured to pre-store the transition compensation data.
Further, the display panel further includes:
the memory is positioned on the flexible circuit board and used for prestoring compensation data;
the compensation data comprise transition compensation data and refresh compensation data corresponding to each refresh frequency of the display panel, and the refresh compensation data are used for compensating the display picture at the corresponding refresh frequency;
and the compensation module is also used for compensating the display picture under the corresponding refresh frequency by using the refresh compensation data under each refresh frequency of the corresponding display panel.
In a third aspect, an embodiment of the present invention provides a display device, including the display panel according to any of the second aspect.
The display compensation method of the display panel comprises the steps of obtaining a current first refresh frequency of the display panel when the display panel displays a picture; acquiring a refresh frequency switching instruction, and calling corresponding transition compensation data according to the refresh frequency switching instruction and the first refresh frequency; and switching the refreshing frequency of the display panel, and compensating the display picture in the switching process by using the corresponding transition compensation data in the switching process. The display compensation method of the display panel provided by the embodiment of the invention adopts the transition compensation data to perform frequency compensation when the refresh frequency is switched, thereby solving the problem of poor display compensation when the refresh frequency is switched.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention 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 for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a flowchart illustrating a display compensation method for a display panel according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a display compensation method for a display panel according to another embodiment of the present invention;
FIG. 3 is a flowchart illustrating a display compensation method for a display panel according to another embodiment of the present invention;
FIG. 4 is a flowchart illustrating a display compensation method for a display panel according to another embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method for compensating data transition of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background art, the conventional display device has a problem of display unevenness, and the inventors have found through research that the reason for this problem is that: the conventional display device has a plurality of different screen display frequencies, and the plurality of display frequencies are switched with each other when a screen is displayed. The existing brightness compensation method obtains display compensation data through a display picture of a certain display frequency, and all display frequencies are compensated by the display compensation data during display, so that the display pictures of certain display frequencies cannot be well compensated. Based on the above technical problem, the present embodiment proposes the following solutions:
fig. 1 is a flowchart of a display compensation method of a display panel according to an embodiment of the present invention. Referring to fig. 1, a display compensation method of a display panel provided in an embodiment of the present invention includes:
s101, when the display panel displays a picture, acquiring a current first refresh frequency of the display panel.
Specifically, the first refresh frequency may be any one of 30Hz, 60Hz, 90Hz, 120Hz, or 144 Hz.
S102, a refresh frequency switching instruction is obtained, and corresponding transition compensation data are called according to the refresh frequency switching instruction and the first refresh frequency.
Specifically, the refresh frequency switching instruction includes information of an m-th refresh frequency to which the display panel is to be switched, the m-th refresh frequency may be any one of 30Hz, 60Hz, 90Hz, 120Hz, or 144Hz, and the first refresh frequency and the m-th refresh frequency are different. The transition compensation data may be determined according to first refresh compensation data corresponding to the first refresh frequency and mth refresh compensation data corresponding to the mth refresh frequency. Wherein the transition compensation data may include first sub-transition compensation data, second sub-transition compensation data, … …, and m-1 th sub-transition compensation data; the first sub-transition compensation data is determined by first refresh compensation data and second refresh compensation data, the second sub-transition compensation data is determined by first refresh compensation data and third refresh compensation data, … …, and the m-1 sub-transition compensation data is determined by first refresh compensation data and m refresh compensation data, m is an integer greater than or equal to 2; the first refreshing compensation data comprises display compensation data when the display panel displays a picture by adopting a first refreshing frequency, the second refreshing compensation data comprises display compensation data when the display panel displays the picture by adopting a second refreshing frequency … …, and the mth refreshing compensation data comprises display compensation data when the display panel displays the picture by adopting a mth refreshing frequency; the number of the display compensation data in the ith sub-transition compensation data is less than the number of the display compensation data in the first refresh compensation data and less than the number of the display compensation data in the (i + 1) th refresh compensation data, wherein i is an integer greater than or equal to 1 and less than or equal to m-1.
The ith sub-transition compensation data is determined by the first refresh compensation data and the (i + 1) th refresh compensation data, for example, the compensation data of a certain sub-pixel at a certain gray scale is a at the first refresh frequency, the compensation data of the sub-pixel at the same gray scale is b at the second refresh frequency, the transition compensation data c may be an average value of a and b, or a and b may be given a certain weight according to the size of a and b, the frequency of use of the first refresh frequency and the second refresh frequency, and the like, and c is obtained by taking the weighted average value of a and b. The ith sub-transition compensation data is determined by the first refreshing compensation data and the (i + 1) th refreshing compensation data, so that the ith sub-transition compensation data can compensate the display picture with the first refreshing frequency to a certain extent and can also compensate the display picture with the (i + 1) th refreshing frequency to a certain extent.
In addition, the number of the display compensation data in the ith sub-transition compensation data is smaller than the number of the display compensation data in the first refreshing compensation data and smaller than the number of the display compensation data in the (i + 1) th refreshing compensation data, that is, the data volume of the transition compensation data is smaller, and the occupied space is smaller.
S103, switching the refreshing frequency of the display panel, and compensating the display picture in the switching process by using the corresponding transition compensation data in the switching process.
Specifically, when the display panel is switched from the first refresh frequency to the nth refresh frequency, the display picture can be compensated by adopting the n-1 st sub-transition compensation data, wherein n is a positive integer which is greater than or equal to 2 and less than or equal to m. Specifically, the (n-1) th sub-transition compensation data is determined by the first refresh compensation data and the (n) th refresh compensation data, that is, the (n-1) th sub-transition compensation data can compensate the first refresh frequency display image to a certain extent, and can also compensate the n-th refresh frequency display image to a certain extent.
Illustratively, the first refresh frequency may be 60Hz, the second refresh frequency may be 90Hz, the first refresh compensation data is 60Hz compensation data, the second refresh compensation data is 90Hz compensation data, the 60Hz compensation data includes display compensation data of a plurality of different gray scales when the display panel displays a picture with 60Hz, the 90Hz compensation data includes display compensation data of a plurality of different gray scales when the display panel displays a picture with 90Hz, and the first sub-transition compensation data is determined by the 60Hz compensation data and the 90Hz compensation data. The first sub-transition compensation data can compensate the 60Hz display picture to a certain extent and can also compensate the 90Hz display picture to a certain extent.
The display compensation method of the display panel provided by the embodiment obtains a current first refresh frequency of the display panel when the display panel displays a picture; calling corresponding transition compensation data according to the refresh frequency switching instruction and the first refresh frequency by acquiring the refresh frequency switching instruction; and switching the refreshing frequency of the display panel, and compensating the display picture in the switching process by using the corresponding transition compensation data in the switching process. And transition compensation data is adopted to carry out frequency compensation during refresh frequency switching, so that the problem of poor display compensation during the existing refresh frequency switching is solved.
Optionally, fig. 2 is a flowchart of another display compensation method for a display panel according to an embodiment of the present invention. On the basis of the foregoing embodiment, referring to fig. 2, a display compensation method for a display panel provided in an embodiment of the present invention includes:
s201, when the display panel displays a picture, acquiring a current first refreshing frequency of the display panel, and determining corresponding first refreshing compensation data according to the first refreshing frequency to compensate the display picture.
Specifically, the first refresh compensation data can accurately compensate the display frame at the first refresh frequency, and when the display device displays the display frame at the first refresh frequency, the driving chip of the display device can perform brightness compensation on the display frame at the first refresh frequency by reading the first refresh compensation data, so that accurate compensation of the display frame is realized, and the display effect of the display frame of the display panel at the first refresh frequency is improved.
S102, a refresh frequency switching instruction is obtained, and corresponding transition compensation data are called according to the refresh frequency switching instruction and the first refresh frequency.
S103, switching the refreshing frequency of the display panel, and compensating the display picture in the switching process by using the corresponding transition compensation data in the switching process.
Optionally, fig. 3 is a flowchart of a display compensation method for a display panel according to another embodiment of the present invention. On the basis of the above embodiments, referring to fig. 3, the display compensation method of the display panel provided by the embodiment of the present invention includes:
s301, when the display panel displays the picture by adopting the first refreshing frequency, the transitional compensation data is pre-loaded into the compensation module.
Specifically, the compensation module may be a random access memory (ROM), and when the picture is displayed at the first refresh frequency, because the number of the display compensation data in the ith sub-transition compensation data is smaller than the number of the display compensation data in the first refresh compensation data and smaller than the number of the display compensation data in the (i + 1) th refresh compensation data, that is, the data amount of the transition compensation data is smaller and the occupied space is smaller, the transition compensation data is preloaded into the ROM, so that the ROM does not occupy too much space, and when the first refresh frequency is switched to the nth refresh frequency, the nth-1 th sub-transition compensation data in the ROM can be directly read to compensate the display picture. The compensation effect of the display picture when the display panel is switched from the first refresh frequency to the nth refresh frequency is improved, and the display effect when the display panel is switched from the first refresh frequency to the nth refresh frequency is improved.
S101, when the display panel displays a picture, acquiring a current first refreshing frequency of the display panel.
S102, a refresh frequency switching instruction is obtained, and corresponding transition compensation data are called according to the refresh frequency switching instruction and the first refresh frequency.
S103, switching the refreshing frequency of the display panel, and compensating the display picture in the switching process by using the corresponding transition compensation data in the switching process.
Optionally, the n-1 th sub-transition compensation data is not only suitable for compensating the first refresh frequency display picture to a certain extent, but also suitable for compensating the nth refresh frequency display picture to a certain extent, when a Flash Memory (Flash Memory) of the display device has a small storage space, the transition compensation data can be stored in the Flash Memory only, and when the first refresh frequency display picture and the nth refresh frequency display picture are adopted, the n-1 th sub-transition compensation data can be adopted for picture compensation, so that the display uniformity is ensured, and meanwhile, the storage space of the display device is saved.
In addition, when the Flash Memory storage space of the display device is sufficient, the first refreshing compensation data and the second refreshing compensation data … … the mth refreshing compensation data can be stored in the Flash Memory storage space, the first refreshing compensation data is adopted for compensation before the frequency switching, the n-1 sub-transition compensation data is adopted for compensation in the initial stage of switching the first refreshing frequency to the nth refreshing frequency, meanwhile, the nth refreshing compensation data is loaded into the ROM, the nth refreshing compensation data is used for replacing the first refreshing compensation data, and the nth refreshing compensation data is adopted for compensation after the loading of the nth refreshing compensation data is completed.
Optionally, when the display panel displays the picture with the first refresh frequency, the display picture may be compensated with the pth sub-transition compensation data, where the pth sub-transition compensation data is determined by the pth +1 refresh compensation data and the first refresh compensation data, the pth +1 refresh frequency is a display frequency adopted by the display panel before the picture is displayed with the first refresh frequency or the pth +1 refresh frequency is a refresh frequency closest to the first refresh frequency, and p is a positive integer greater than or equal to 1 and less than or equal to m-1.
For example, when the compensation data of the display device is large and the space of the Flash Memory of the display device is small, which is difficult to satisfy the storage of a large amount of compensation data, only the transition compensation data may be stored in the Flash Memory. When the display device displays the picture by adopting the first refreshing frequency, the p-th sub-transition compensation data can be directly adopted for compensation. The pth sub-transition compensation data is determined by the pth +1 refresh compensation data and the first refresh compensation data, and the pth +1 refresh frequency is the refresh frequency adopted by the display panel before the display panel adopts the first refresh frequency to display the picture. After the p +1 th refresh frequency is switched to the first refresh frequency, the p-th sub-transition compensation data adopted during the frequency switching can be directly used, new compensation data do not need to be loaded, and the running space of the driving chip is saved. Illustratively, the first refresh frequency is 60Hz, the second refresh frequency is 90Hz, and the third refresh frequency is 120Hz, and if the refresh frequency adopted by the display panel before displaying the picture with the first refresh frequency of 60Hz is 120Hz, the p +1 th refresh frequency may be 120Hz.
The p +1 th refresh frequency may be a frequency closest to the first refresh frequency, and since the closer the refresh frequency is, the closer the degree of deviation of the screen is when the screen is displayed, the closer the refresh frequency is, the display compensation data of the refresh frequency is, and the compensation effect is better when the display screen is compensated by using the transition compensation data of the refresh frequency closest to the first refresh frequency and the first refresh frequency. Illustratively, if the display panel displays a picture with a first refresh frequency of 60Hz, the first refresh frequency of the three refresh frequencies is 60Hz, the second refresh frequency is 90Hz, the third refresh frequency is 120Hz, and the refresh frequency closest to the first refresh frequency of 60Hz is 90Hz, the p +1 th refresh frequency may be 90Hz, and the p-th sub-transition compensation data is determined by 90Hz compensation data and 60Hz compensation data.
Optionally, fig. 4 is a flowchart of a display compensation method of a display panel according to another embodiment of the present invention. On the basis of the foregoing embodiment, referring to fig. 4, a display compensation method for a display panel provided in an embodiment of the present invention includes:
s301, when the display panel displays the picture by adopting the first refreshing frequency, the transitional compensation data is pre-loaded into the compensation module.
S101, when the display panel displays a picture, acquiring a current first refresh frequency of the display panel.
S102, a refresh frequency switching instruction is obtained, and corresponding transition compensation data are called according to the refresh frequency switching instruction and the first refresh frequency.
S103, switching the refreshing frequency of the display panel, and compensating the display picture in the switching process by using the corresponding transition compensation data in the switching process.
S401, after the refresh frequency of the display panel is switched, acquiring a second refresh frequency of the display panel, and calling corresponding second refresh compensation data according to the second refresh frequency to compensate the display frame.
Specifically, when the display panel is switched from the first refresh frequency to the nth refresh frequency, the nth refresh compensation data is loaded into the ROM, and the first refresh compensation data is overwritten by the nth refresh compensation data. And after the loading of the nth refreshing compensation data is finished, compensating the display picture by adopting the nth refreshing compensation data.
In addition, when the display panel is switched from the first refresh frequency to the nth refresh frequency, the nth refresh compensation data is loaded into the random access memory, and when the space of the ROM is limited, the first refresh compensation data can be covered by the nth refresh compensation data. Because the display panel is switched from the first refresh frequency to the nth refresh frequency quickly, the loading of the nth refresh compensation data to the ROM needs a certain time, and the first refresh compensation data, the second refresh compensation data … … and the mth refresh compensation data occupy a large storage space, when the display panel adopts the first refresh frequency to display a picture, the transition compensation data occupying a small storage space can be loaded to the ROM in advance, and at the initial stage of switching from the first refresh frequency to the nth refresh frequency, the n-1 st sub-transition compensation data is directly adopted to compensate, and the display picture can be compensated well at the beginning of the frequency switching while occupying a small ROM space. And meanwhile, loading the nth refresh compensation data corresponding to the display picture with the nth refresh frequency into the ROM to replace the first refresh compensation data, so that only one type of compensation data with the refresh frequency and transition compensation data exist in the ROM, and when the nth refresh compensation data is loaded, compensating the display picture by adopting the nth refresh compensation data, thereby realizing accurate compensation of the display picture and improving the compensation effect of the display device.
In addition, when the nth refresh compensation data is loaded, transition compensation data corresponding to the nth refresh frequency may be loaded at the same time, and the transition compensation data may replace the transition compensation data corresponding to the first refresh frequency. Transition compensation data corresponding to the nth refresh frequency, that is, transition compensation data corresponding to the nth refresh frequency when the nth refresh frequency is switched with other refresh frequencies, for example, when n =2, transition compensation data corresponding to the second refresh frequency includes first transition compensation data determined by the second refresh compensation data and the first refresh compensation data, second transition compensation data determined by the second refresh compensation data and the third refresh compensation data, … …, and m-1 transition compensation data determined by the second refresh compensation data and the m-th refresh compensation data.
In addition, after the display panel is switched to the nth refresh frequency, the display picture can be compensated by continuously adopting the nth-1 sub-transition compensation data, or the compensation data of the refresh frequency closest to the nth refresh frequency and the sub-transition compensation data determined by the nth refresh compensation data can be loaded, the nth-1 refresh compensation data is replaced by the sub-transition compensation data, and the display picture of the nth refresh frequency is compensated by adopting the sub-transition compensation data.
Optionally, the transition compensation data is determined by a mean of the first refresh compensation data and the second refresh compensation data. Optionally, the first refresh compensation data is obtained by averaging sub refresh compensation data corresponding to each sub pixel of the display panel at a first refresh frequency; the second refresh compensation data is obtained by averaging sub-refresh compensation data corresponding to each sub-pixel of the display panel at the second refresh frequency.
Specifically, the i +1 th refresh compensation data is obtained by averaging the sub-refresh compensation data corresponding to each sub-pixel of the display panel at the i +1 th refresh frequency. The ith sub-transition compensation data is determined according to an average value of the first refresh compensation data and the (i + 1) th refresh compensation data. Since the transition compensation data may include first sub-transition compensation data, second sub-transition compensation data, … …, and m-1 th sub-transition compensation data; the first sub-transition compensation data is determined by the mean value of the first refreshing compensation data and the second refreshing compensation data, the ith sub-transition compensation data corresponding to the preset gray scale is determined according to the mean value of the first refreshing compensation data corresponding to the preset gray scale and the (i + 1) th refreshing compensation data corresponding to the preset gray scale, wherein i is an integer which is greater than or equal to 1 and less than or equal to m-1.
The preset gray scale can be any gray scale from 0 to 255, and a plurality of preset gray scales can be selected. For example, the preset gray scale may be 32 gray scales, and the first refresh compensation data corresponding to the preset gray scale is a difference between an actual display gray scale of each sub-pixel and the 32 gray scales when the frame is displayed at the first refresh frequency. The actual brightness of each sub-pixel under the 32 gray scale can be collected, and after the actually collected actual brightness of each sub-pixel is converted into the gray scale, the difference value between the gray scale corresponding to the actual brightness and the 32 gray scale is obtained.
The first refresh compensation data may include a compensation gray scale value of each sub-pixel at a plurality of different gray scales, and the i +1 th refresh compensation data may include a compensation gray scale value of each sub-pixel at a plurality of different gray scales. The ith sub-transition compensation data corresponding to the sub-pixel can be determined according to the average value of the first refreshing compensation data and the (i + 1) th refreshing compensation data corresponding to the same sub-pixel under the set gray scale. As the ith sub-transition compensation data is determined according to the first refreshing compensation data and the mean value of the (i + 1) th refreshing compensation data, the ith sub-transition compensation data can compensate the display picture with the first refreshing frequency to a certain extent, and the display picture with the (i + 1) th refreshing frequency can be compensated to a certain extent, and meanwhile, the calculation difficulty is reduced.
Optionally, fig. 5 is a flowchart of determining ith sub-transition compensation data in a display compensation method of a display panel according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 5, the ith sub-transition compensation data is determined by the following process:
s501, averaging the first refreshing compensation data and the (i + 1) th refreshing compensation data of each sub-pixel under the preset gray scale to obtain average compensation data of each sub-pixel under the preset gray scale.
For example, the preset gray level may be 35 gray levels, and the average compensation data of each sub-pixel at 35 gray levels is obtained by averaging the first refresh compensation data and the (i + 1) th frequency compensation data of each sub-pixel at 35 gray levels.
S502, determining the data which are larger than a first threshold value and the data which are smaller than a second threshold value in the average compensation data as the sub-transition compensation values of the preset gray scale.
Specifically, the brightness deviation of the sub-pixel with the average value of the first refresh compensation data and the ith refresh compensation data in the preset gray scale, which is larger than the first threshold value, and smaller than the second threshold value, is larger, and the compensation is performed on the sub-pixel, so that the display unevenness can be reduced to a larger extent. The data larger than the first threshold value and the data smaller than the second threshold value in the average compensation data are determined as the sub-transition compensation values, so that the data volume of the sub-transition compensation data can be reduced, the storage space occupied by the sub-transition compensation data is reduced, and the display unevenness is improved to a greater extent.
Alternatively, the first threshold may be determined according to the median of the compensation data greater than zero in the average compensation data, and the second threshold may be determined according to the median of the compensation data less than zero in the average compensation data.
Illustratively, the deviation of the median of the compensation data larger than zero in the average compensation data in the compensation data larger than zero is in the middle, the deviation of the median of the compensation data smaller than zero in the average compensation data in the compensation data smaller than zero is in the middle, and taking the median as the threshold value can greatly reduce the data amount of the sub-transition compensation data, reduce the storage space occupied by the sub-transition compensation data, and greatly improve the display unevenness. Taking the preset gray level as 35 gray level as an example, if the gray level values after the actual display luminance is converted into gray levels are 27, 28, 29, 29, 34, 36, 39, 40, 40, 45, 49, … … respectively, the difference values between the gray level corresponding to the actual display luminance and the gray level of the preset gray level 35 are: -8, -7, -6, -6, -1,4,5,5, 10, 14, … …, the median of the compensation data greater than zero in the average compensation data may be 5, the first threshold may be set to 5, the median of the compensation data less than zero in the average compensation data may be-6, and the second threshold may be set to-6. And determining the data larger than the first threshold value and the data smaller than the second threshold value in the average compensation data as the sub-transition compensation values of the preset gray scale, the sub-transition compensation values may include compensation values with large deviations such as-8, -7, 10, 14, and the like.
S503, determining the sub-transition compensation values of the plurality of preset gray scales as the ith sub-transition compensation data, wherein i is an integer which is greater than or equal to 1 and less than or equal to m-1.
Specifically, the ith sub-transition compensation data includes sub-transition compensation values of a plurality of preset gray scales, that is, the ith sub-transition compensation data can compensate the brightness of each sub-pixel at different gray scales. For example, taking the gray levels of 0 to 255 as an example, the sub-transition compensation values of a plurality of preset gray levels, such as the gray level of 0, the gray level of 32, the gray level of 64, and the gray level of 128, can be determined as the ith sub-transition compensation data.
The display compensation method of the display panel provided by the embodiment includes that when the display panel displays a picture by adopting a first refresh frequency, transition compensation data is pre-loaded into the random access Memory, when the display panel is switched from the first refresh frequency to an nth refresh frequency, n-1 sub-transition compensation data is adopted to compensate the display picture, because the n-1 sub-transition compensation data can compensate the display picture of the first refresh frequency to a certain extent, and can also compensate the display picture of the nth refresh frequency to a certain extent, when the display panel is switched from the first refresh frequency to the nth refresh frequency, the n-1 sub-transition compensation data can be directly adopted to compensate the display picture, and the data amount in the n-1 sub-transition compensation data is small, so that the space for too much space of a ROM and a Flash Memory cannot be occupied, therefore, the scheme of the embodiment improves the compensation effect of the display picture when the display panel is switched from the first refresh frequency to the nth refresh frequency, and saves the storage space of the display device.
Optionally, fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 6, a display panel 100 according to an embodiment of the present invention includes:
a frequency obtaining module 61, configured to obtain a current first refresh frequency of the display panel when the display panel displays a screen;
a data calling module 62, configured to obtain a refresh frequency switching instruction, and call corresponding transition compensation data according to the refresh frequency switching instruction and the first refresh frequency;
and the driving chip 63 comprises a switching module 631 and a compensation module 632, the switching module is used for switching the refresh frequency of the display panel, and the compensation module is used for compensating the display picture in the switching process by using the corresponding transition compensation data in the switching process.
In particular, the compensation module may include a random access memory (ROM). When the first refresh frequency is adopted to display the picture, the number of the display compensation data in the ith sub-transition compensation data is smaller than the number of the display compensation data in the first refresh compensation data and smaller than the number of the display compensation data in the (i + 1) th refresh compensation data, namely, the data volume of the transition compensation data is smaller and the occupied space is smaller, so that the transition compensation data is pre-loaded into the ROM, the excessive space of the ROM is not occupied, and when the first refresh frequency is switched to the nth refresh frequency, the (n-1) th sub-transition compensation data in the ROM can be directly read to compensate the display picture. The compensation effect of the display picture when the display panel is switched from the first refresh frequency to the nth refresh frequency is improved, and the display effect when the display panel is switched from the first refresh frequency to the nth refresh frequency is improved.
Optionally, the compensation module 632 is further configured to pre-store the transition compensation data.
Optionally, fig. 7 is a schematic structural diagram of another display panel provided in the embodiment of the present invention. On the basis of the above embodiment, referring to fig. 7, the display panel further includes:
a memory 71, which is located on the flexible circuit board and is used for pre-storing compensation data; the compensation data comprises transition compensation data and refresh compensation data corresponding to each refresh frequency of the display panel, and the refresh compensation data is used for compensating the display picture at the corresponding refresh frequency.
Specifically, the memory may be a flash memory (flash memory).
The compensation module 632 is further configured to compensate the display frame at the corresponding refresh frequency by using the refresh compensation data at each refresh frequency of the corresponding display panel.
Specifically, when the Flash Memory storage space of the display device is sufficient, the first refresh compensation data and the second refresh compensation data … …, the mth refresh compensation number may be stored in the Flash Memory storage space, the first refresh compensation data is used for compensation before the frequency switching, the nth-1 sub-transition compensation data is used for compensation at the initial stage when the first refresh frequency is switched to the nth refresh frequency, the nth refresh compensation data is loaded into the ROM, the nth refresh compensation data is used for replacing the first refresh compensation data, and the nth refresh compensation data is used for compensation after the nth refresh compensation data is loaded.
Optionally, fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention. On the basis of the foregoing embodiments, referring to fig. 8, a display device 200 according to an embodiment of the present invention includes the display panel 100 according to any of the above embodiments, and has the advantages of any of the above embodiments, which are not described herein again.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (9)
1. A display compensation method of a display panel is characterized by comprising the following steps: when the display panel displays a picture, acquiring a current first refreshing frequency of the display panel;
acquiring a refresh frequency switching instruction, and calling corresponding transition compensation data according to the refresh frequency switching instruction and the first refresh frequency;
switching the refresh frequency of the display panel, and compensating the display picture in the switching process by using the corresponding transition compensation data in the switching process;
before the step of obtaining the current first refresh frequency of the display panel, the method further includes:
when the display panel displays a picture by adopting a first refreshing frequency, the transitional compensation data is pre-loaded into a compensation module; the compensation module comprises a random access memory, and the pre-loading of the transitional compensation data into the compensation module comprises: pre-loading transition compensation data into the random access memory;
the transition compensation data can be determined according to first refresh compensation data corresponding to the first refresh frequency and mth refresh compensation data corresponding to the mth refresh frequency; wherein the transition compensation data may include first sub-transition compensation data, second sub-transition compensation data, … …, and m-1 th sub-transition compensation data; the first sub-transition compensation data is determined by first refresh compensation data and second refresh compensation data, the second sub-transition compensation data is determined by the first refresh compensation data and third refresh compensation data, … …, and the m-1 sub-transition compensation data is determined by the first refresh compensation data and the m refresh compensation data, m is an integer greater than or equal to 2; the first refresh compensation data comprises display compensation data when the display panel displays a picture by adopting the first refresh frequency, the second refresh compensation data comprises display compensation data when the display panel displays the picture by adopting the second refresh frequency … …, and the mth refresh compensation data comprises display compensation data when the display panel displays the picture by adopting the mth refresh frequency;
the number of the display compensation data in the ith sub-transition compensation data is less than the number of the display compensation data in the first refreshing compensation data and less than the number of the display compensation data in the (i + 1) th refreshing compensation data, wherein i is an integer which is greater than or equal to 1 and less than or equal to m-1;
when the display panel is switched from the first refresh frequency to the nth refresh frequency, compensating the display picture by adopting the n-1 sub-transition compensation data, wherein n is a positive integer which is greater than or equal to 2 and less than or equal to m;
the ith sub-transition compensation data is determined by the following process:
averaging the first refreshing compensation data and the (i + 1) th refreshing compensation data of each sub-pixel under the preset gray scale to obtain average compensation data of each sub-pixel under the preset gray scale;
determining the data which is larger than a first threshold value and the data which is smaller than a second threshold value in the average compensation data as the sub-transition compensation value of the preset gray scale; the first threshold value is determined according to the median of the compensation data which are larger than zero in the average compensation data, and the second threshold value is determined according to the median of the compensation data which are smaller than zero in the average compensation data;
and determining the sub-transition compensation values of a plurality of preset gray scales as the ith sub-transition compensation data.
2. The method according to claim 1, wherein the step of obtaining a current first refresh frequency of the display panel when the display panel displays a picture further comprises:
and determining corresponding first refreshing compensation data according to the first refreshing frequency to compensate the display picture.
3. The display compensation method according to claim 2, wherein after the refresh frequency of the display panel is switched, a second refresh frequency of the display panel is obtained, and corresponding second refresh compensation data is called according to the second refresh frequency to compensate the display frame.
4. The display compensation method of claim 3,
the first refreshing compensation data is obtained by averaging the sub refreshing compensation data corresponding to each sub-pixel of the display panel under the first refreshing frequency;
the second refresh compensation data is obtained by averaging the sub-refresh compensation data corresponding to each sub-pixel of the display panel at the second refresh frequency.
5. The display compensation method of claim 3, wherein the transition compensation data is determined by an average of the first refresh compensation data and the second refresh compensation data.
6. The display compensation method of claim 3, wherein the first refresh frequency and the second refresh frequency are any one of 30Hz, 60Hz, 90Hz, 120Hz, or 144Hz and the first refresh frequency and the second refresh frequency are not the same.
7. A display panel, comprising:
the frequency acquisition module is used for acquiring a current first refreshing frequency of the display panel when the display panel displays a picture;
the data calling module is used for acquiring a refresh frequency switching instruction and calling corresponding transition compensation data according to the refresh frequency switching instruction and the first refresh frequency; the transition compensation data can be determined according to first refresh compensation data corresponding to the first refresh frequency and mth refresh compensation data corresponding to the mth refresh frequency; wherein the transition compensation data may include first sub-transition compensation data, second sub-transition compensation data, … …, and m-1 th sub-transition compensation data; the first sub-transition compensation data is determined by first refresh compensation data and second refresh compensation data, the second sub-transition compensation data is determined by the first refresh compensation data and third refresh compensation data, … …, and the m-1 sub-transition compensation data is determined by the first refresh compensation data and the m refresh compensation data, m is an integer greater than or equal to 2; the first refresh compensation data comprises display compensation data when the display panel displays a picture by adopting the first refresh frequency, the second refresh compensation data comprises display compensation data when the display panel displays the picture by adopting the second refresh frequency … …, and the mth refresh compensation data comprises display compensation data when the display panel displays the picture by adopting the mth refresh frequency; the number of the display compensation data in the ith sub-transition compensation data is less than the number of the display compensation data in the first refreshing compensation data and less than the number of the display compensation data in the (i + 1) th refreshing compensation data, wherein i is an integer which is greater than or equal to 1 and less than or equal to m-1; the ith sub-transition compensation data is determined by the following process: averaging the first refreshing compensation data and the (i + 1) th refreshing compensation data of each sub-pixel under the preset gray scale to obtain average compensation data of each sub-pixel under the preset gray scale; determining the data which is larger than a first threshold value and the data which is smaller than a second threshold value in the average compensation data as the sub-transition compensation value of the preset gray scale; the first threshold value is determined according to the median of the compensation data which are larger than zero in the average compensation data, and the second threshold value is determined according to the median of the compensation data which are smaller than zero in the average compensation data; determining sub-transition compensation values of a plurality of preset gray scales as ith sub-transition compensation data;
the driving chip comprises a switching module and a compensation module, the switching module is used for switching the refreshing frequency of the display panel, and the compensation module is used for compensating the display picture in the switching process by using the corresponding transition compensation data in the refreshing frequency switching process; when the display panel is switched from the first refresh frequency to the nth refresh frequency, compensating the display picture by adopting the n-1 sub-transition compensation data, wherein n is a positive integer which is greater than or equal to 2 and less than or equal to m;
the compensation module is used for storing the transitional compensation data in the compensation module and pre-loading the transitional compensation data into the compensation module when the display panel displays a picture by adopting a first refreshing frequency; the compensation module includes a random access memory, and the preloading of the transient compensation data into the compensation module includes: pre-loading transition compensation data into the random access memory.
8. The display panel according to claim 7, further comprising:
the memory is positioned on the flexible circuit board, refreshing compensation data corresponding to each refreshing frequency of the display panel are prestored in the memory, and the compensation module is used for calling the refreshing compensation data to compensate the display picture under the corresponding refreshing frequency.
9. A display device characterized by comprising the display panel according to any one of claims 7 to 8.
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