CN113593501B - Mura compensation method and compensation device of display panel and display device - Google Patents
Mura compensation method and compensation device of display panel and display device Download PDFInfo
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- CN113593501B CN113593501B CN202110864318.4A CN202110864318A CN113593501B CN 113593501 B CN113593501 B CN 113593501B CN 202110864318 A CN202110864318 A CN 202110864318A CN 113593501 B CN113593501 B CN 113593501B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
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Abstract
The invention discloses a mura compensation method and a mura compensation device of a display panel and a display device. The mura compensation method of the display panel comprises the steps of obtaining screen brightness data under a preset gray scale; the screen brightness data comprises main display area brightness data and auxiliary display area brightness data; searching invalid brightness data in the brightness data of the auxiliary display area; resetting the invalid luminance data to preset luminance data; according to the reset auxiliary display area brightness data and the main display area brightness data, reducing the reset auxiliary display area brightness data; and performing demura compensation according to the reduced brightness data of the auxiliary display area. The technical scheme of the invention solves the problem that the auxiliary display area has uneven display when the conventional display panel displays.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a mura compensation method and a mura compensation device for a display panel and a display device.
Background
Along with the development of display technology and the improvement of the living standard of people, the requirement on the display effect of the display panel is higher and higher, and the problem of uneven display exists in the auxiliary display area of the existing display panel when the auxiliary display area displays, so that the user experience is influenced.
Disclosure of Invention
The embodiment of the invention provides a mura compensation method and a mura compensation device of a display panel and a display device, and aims to solve the problem that a secondary display area of an existing display panel is uneven in display.
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 mura compensation method for a display panel, including:
acquiring screen brightness data under a preset gray scale; the screen brightness data comprises main display area brightness data and auxiliary display area brightness data;
searching invalid brightness data in the brightness data of the auxiliary display area;
resetting the invalid brightness data to preset brightness data;
reducing the reset auxiliary display area brightness data according to the reset auxiliary display area brightness data and the reset main display area brightness data;
and performing demura compensation according to the reduced brightness data of the auxiliary display area.
Optionally, the preset luminance data is equal to an average value of effective luminance data of the set sub-pixels; wherein the set sub-pixels comprise n × m sub-pixels around the sub-pixel corresponding to the invalid luminance data; n m is an integer greater than or equal to 2.
Optionally, before searching for invalid luminance data in the luminance data of the secondary display area, the method further includes:
and dividing the brightness data of the auxiliary display area into effective brightness data and ineffective brightness data according to the comparison result of the brightness data of the auxiliary display area and a preset threshold value.
Optionally, the dividing, according to the comparison result between the luminance data of the secondary display area and a preset threshold, the luminance data of the secondary display area into effective luminance data and ineffective luminance data includes:
if the brightness data of the auxiliary display area is smaller than a first preset threshold value, the brightness data of the auxiliary display area is invalid brightness data; the preset threshold comprises a first preset threshold and a second preset threshold; the second preset threshold is greater than the first preset threshold;
and if the brightness data of the auxiliary display area is larger than a second preset threshold value, the brightness data of the auxiliary display area is effective brightness data.
Optionally, resetting the invalid luminance data to preset luminance data includes:
resetting the average value of the effective brightness data of n × m sub-pixels taking the sub-pixel corresponding to the ineffective brightness data as the center as the brightness data of the sub-pixel corresponding to the ineffective brightness data.
Optionally, the effective luminance data is distributed in the setting sub-pixels.
Optionally, the number of n × m sub-pixels around the sub-pixel corresponding to different invalid luminance data is different.
Optionally, the reducing the reset sub-display area luminance data according to the reset sub-display area luminance data and the reset main-display area luminance data includes:
and according to the ratio of the average value of the reset auxiliary display area brightness data to the average value of the main display area effective brightness data, reducing the reset auxiliary display area brightness data in an equal proportion.
In a second aspect, an embodiment of the present invention provides a mura compensation apparatus for a display panel, including:
the data acquisition module is used for acquiring screen brightness data under a preset gray scale; the screen brightness data comprise main display area brightness data and auxiliary display area brightness data;
the query module is used for searching invalid brightness data in the brightness data of the auxiliary display area;
the data refreshing module is used for resetting the invalid brightness data to preset brightness data;
the data adjusting module is used for reducing the reset auxiliary display area brightness data according to the reset auxiliary display area brightness data and the reset main display area brightness data;
and the compensation module is used for performing demura compensation according to the reduced brightness data of the auxiliary display area.
In a third aspect, an embodiment of the present invention further provides a display device, including: a display panel and a mura compensation device of the display panel of the second aspect.
The mura compensation method of the display panel provided by the embodiment of the invention resets the invalid brightness data to the preset brightness data, reduces the reset auxiliary display area brightness data according to the reset auxiliary display area brightness data and the main display area brightness data, and performs the demura compensation according to the reduced auxiliary display area brightness data, thereby realizing the resetting of the invalid brightness data in the auxiliary display area brightness data to the valid brightness data, so that the brightness data of the auxiliary display area is closer to the brightness data of the main display area, and performs the demura compensation on the sub-pixels of the main display area and the auxiliary display area according to the reduced auxiliary display area brightness data, the compensation precision is higher, the compensation effect of the reset set sub-pixels is closer to the compensation effect of the valid brightness data of the auxiliary display area, and the compensation effect of the sub-pixels corresponding to each valid brightness data of the auxiliary display area is better, the display uniformity of the display panel is improved, and the problem that the display is uneven when the auxiliary display area of the conventional display panel is displayed is solved.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be 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 description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings may be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a flowchart of a mura compensation method of a display panel according to an embodiment of the present invention;
FIG. 3 is a flowchart of another mura compensation method for a display panel according to an embodiment of the present invention;
FIG. 4 is a flowchart of a mura compensation method of a display panel according to an embodiment of the present invention;
FIG. 5 is a flowchart of a mura compensation method of a display panel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating distribution of sub-pixels of a mura compensation method for a display panel according to an embodiment of the present invention;
FIG. 7 is a flowchart of a mura compensation method of a display panel according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a mura compensation apparatus of a display panel according to an embodiment of the present invention;
fig. 9 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 panel has uneven display during display, and the inventor has found that the reason for this problem is that the sub-display area such as UDC is provided with a camera module and needs high transmittance, the luminance data of the sub-display area contains about 75% of invalid luminance data, the value of the invalid luminance data is very low, about 10% to 20% of the valid luminance data, and since the driving chip IC of the conventional display device cannot filter the invalid luminance data of the sub-display area such as the under-screen camera display technology (UDC), the invalid luminance data with low value induces the demura algorithm of the IC to generate a high compensation amount, so as to perform luminance compensation on the sub-display area, thereby causing abnormal display effect of the display device. When the existing display panel carries out display compensation, the mura problem of the main display area can be compensated, and the problem of uneven display still exists in the auxiliary display area when the auxiliary display area is displayed.
Based on the above technical problem, the present embodiment proposes the following solutions:
fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention. Referring to fig. 1, since the sub-display area 11 such as UDC is provided with the camera module, high transmittance is required, the luminance data of the sub-display area 11 contains about 75% of invalid luminance data, the value of the invalid luminance data is very low, which is about 10% to 20% of the valid luminance data, the sub-pixels corresponding to the invalid luminance data account for about 75% of all the sub-pixels of the sub-display area 11, the sub-pixels corresponding to the valid luminance data account for about 25% of all the sub-pixels of the sub-display area 11, and the valid luminance data of the sub-display area 11 needs to be set higher than the luminance data corresponding to the sub-pixels of the main display area 12. It should be noted that fig. 1 only illustrates the case where the sub display area is U-shaped, and the sub display area may be rectangular, circular, or the like as needed, and is not limited herein.
Fig. 2 is a flowchart of a mura compensation method of a display panel according to an embodiment of the present invention. Referring to fig. 2, the mura compensation method for a display panel according to an embodiment of the present invention includes:
s101, acquiring screen brightness data under a preset gray scale; the screen brightness data comprises main display area brightness data and auxiliary display area brightness data.
Specifically, the screen brightness data under a preset gray scale can be obtained by taking a picture and the like, the preset gray scale can be any one or more gray scales from 1 to 255, and for example, the preset gray scale can be 255 gray scales to obtain the screen brightness data.
S102, searching invalid brightness data in the brightness data of the auxiliary display area.
Specifically, from the first row to the last row, each row may sequentially search for invalid luminance data in the luminance data of the sub-display region from left to right, and the searched invalid luminance data of each sub-pixel may be in one-to-one correspondence with each sub-pixel.
S103, resetting the invalid brightness data to preset brightness data.
Optionally, the preset luminance data is equal to an average value of effective luminance data of the set sub-pixels; wherein the set sub-pixels comprise n × m sub-pixels around the sub-pixel corresponding to the invalid luminance data; n m is an integer greater than or equal to 2.
Specifically, the sub-pixels include n × m sub-pixels around the sub-pixel corresponding to the invalid luminance data, and the sub-pixel corresponding to the invalid luminance data may be located at the center position of the n × m sub-pixels or other positions except the center position. The brightness data of the sub-pixels corresponding to the reset invalid brightness data are equal to the mean value of the valid brightness data of the set sub-pixels, so that the valid brightness data in the set sub-pixels can be jointly fitted to the brightness data of the sub-pixels corresponding to the reset invalid brightness data, the brightness data of the sub-pixels in the auxiliary display area are all valid brightness data, and the uniformity of the brightness data of the sub-pixels in the auxiliary display area is good.
S104, reducing the reset auxiliary display area brightness data according to the reset auxiliary display area brightness data and the reset main display area brightness data.
Specifically, since the brightness data of each sub-pixel of the reset sub-display area is effective brightness data, the brightness data of the reset sub-display area is reduced according to the brightness data of the reset sub-display area and the brightness data of the main display area, and the brightness data of each sub-pixel of the sub-display area can be consistent with the brightness data of the main display area, so that the brightness data of the reduced sub-display area is closer to the brightness data of the main display area.
And S105, performing demura compensation according to the reduced brightness data of the auxiliary display area.
Specifically, the driving chip analyzes the luminance data of the main display area and the luminance data of the reduced auxiliary display area, calculates a compensation value under a preset gray scale aiming at mura, performs demura compensation according to the compensation value, ensures that the display consistency of the main display area and the auxiliary display area is better after demura compensation, ensures that the compensation effect of each sub-pixel is better, and better compensates the display unevenness of the display panel. On the other hand, the difference of the brightness data of the main display area and the auxiliary display area is solved through the preprocessing of the brightness data, the special setting and processing of the auxiliary display area UDC in the driving chip part are not needed, and the cost of the driving chip is reduced.
It should be noted that the sub display area may include a transparent area and a transition area, and when the sub display area may include the transparent area and the transition area, the mura compensation method of the display panel according to the embodiment of the present invention may improve the problem of uneven display at the boundary between the transparent area and the transition area of the sub display area.
The mura compensation method for the display panel provided by the embodiment resets the invalid luminance data to the preset luminance data. And reducing the brightness data of the reset auxiliary display area according to the brightness data of the reset auxiliary display area and the brightness data of the main display area, and performing demura compensation according to the reduced brightness data of the auxiliary display area, so that the invalid brightness data in the brightness data of the auxiliary display area is reset into the valid brightness data, and the brightness data of the auxiliary display area is closer to the brightness data of the main display area. According to the reduced brightness data of the auxiliary display area, demura compensation is carried out on the sub-pixels of the main display area and the auxiliary display area, the compensation precision is higher, the compensation effect of the reset set sub-pixels is close to that of the effective brightness data of the auxiliary display area, the compensation effect of the sub-pixels corresponding to each effective brightness data of the auxiliary display area is better, the display uniformity of the display panel is improved, and the problem that the display is uneven in the auxiliary display area of the existing display panel during display is solved.
Optionally, fig. 3 is a flowchart of another mura compensation method for a display panel according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 3, the mura compensation method for a display panel provided in the embodiment of the present invention includes:
s101, acquiring screen brightness data under a preset gray scale; the screen brightness data comprises main display area brightness data and auxiliary display area brightness data.
S201, dividing the brightness data of the auxiliary display area into effective brightness data and ineffective brightness data according to the comparison result of the brightness data of the auxiliary display area and a preset threshold value.
Specifically, the preset threshold may be set according to needs, for example, the preset threshold is equal to the average value of the luminance data of the main display area, or 1.5 times or 2 times of the average value of the luminance data of the main display area. If the brightness data of the auxiliary display area is larger than or equal to a preset threshold value, judging the brightness data of the auxiliary display area to be effective brightness data; and if the brightness data of the auxiliary display area is smaller than the preset threshold value, judging that the brightness data of the auxiliary display area is invalid brightness data.
It should be noted that the preset threshold may be set as needed, and the preset threshold may be only to distinguish the invalid luminance data from the valid luminance data, which is not limited herein.
S102, searching invalid brightness data in the brightness data of the auxiliary display area.
S103, resetting the invalid brightness data to preset brightness data.
And S104, reducing the reset auxiliary display area brightness data according to the reset auxiliary display area brightness data and the main display area brightness data.
And S105, performing demura compensation according to the reduced brightness data of the auxiliary display area.
Optionally, fig. 4 is a flowchart of a mura compensation method of a display panel according to another embodiment of the present invention. On the basis of the above embodiments, referring to fig. 4, the mura compensation method for a display panel provided by the embodiment of the invention includes:
s101, acquiring screen brightness data under a preset gray scale; the screen brightness data comprises main display area brightness data and auxiliary display area brightness data.
S301, if the brightness data of the auxiliary display area is smaller than a first preset threshold value, the brightness data of the auxiliary display area is invalid brightness data; wherein the preset threshold comprises a first preset threshold.
Specifically, the setting can quickly determine the invalid brightness data in the brightness data of the auxiliary display area, and the invalid brightness data is not easily interfered by the valid brightness data of the display area, so that the accuracy is better. Optionally, the first preset threshold is equal to 0.6 times of the average of the effective brightness data of the main display area.
S302, if the brightness data of the auxiliary display area is larger than a second preset threshold value, the brightness data of the auxiliary display area is effective brightness data; the preset threshold value further comprises a second preset threshold value; the second preset threshold is greater than the first preset threshold.
Specifically, the effective brightness data in the brightness data of the auxiliary display area can be determined quickly by the arrangement, the interference of the effective brightness data of the display area is not easy to occur, and the distinguishing accuracy of the effective brightness data and the invalid brightness data is further improved. Optionally, the second preset threshold is equal to 2 times of the average of the effective brightness data of the main display area.
S102, searching invalid brightness data in the brightness data of the auxiliary display area.
And S103, resetting the invalid brightness data to preset brightness data.
S104, reducing the reset auxiliary display area brightness data according to the reset auxiliary display area brightness data and the reset main display area brightness data.
And S105, performing demura compensation according to the reduced brightness data of the auxiliary display area.
Optionally, fig. 5 is a flowchart of a mura compensation method of a display panel according to another embodiment of the present invention. On the basis of the above embodiments, referring to fig. 5, the mura compensation method for a display panel provided by the embodiment of the invention includes:
s101, acquiring screen brightness data under a preset gray scale; the screen brightness data comprises main display area brightness data and auxiliary display area brightness data.
S201, dividing the brightness data of the auxiliary display area into effective brightness data and ineffective brightness data according to the comparison result of the brightness data of the auxiliary display area and a preset threshold value.
S102, searching invalid brightness data in the brightness data of the auxiliary display area.
S401, resetting the mean value of the effective luminance data of n × m sub-pixels centering on the sub-pixel corresponding to the ineffective luminance data to the luminance data of the sub-pixel corresponding to the ineffective luminance data.
Specifically, the arrangement is such that the display center of the n × m sub-pixels is located in the sub-pixels corresponding to the invalid luminance data, the luminance data of the sub-pixels corresponding to the invalid luminance data is reset to the average value of the effective luminance data of the n × m sub-pixels centered on the sub-pixels corresponding to the invalid luminance data, so that the luminance data of the sub-pixels corresponding to the reset invalid luminance data is closer to the effective luminance data of the set sub-pixels, more accurate effective luminance data is provided for the calculation of the subsequent compensation value, and the display effect of the display panel is further improved.
And S104, reducing the reset auxiliary display area brightness data according to the reset auxiliary display area brightness data and the main display area brightness data.
And S105, performing demura compensation according to the reduced brightness data of the auxiliary display area.
Optionally, the value ranges of m and n may be: m is more than or equal to 3 and less than or equal to 5, and n is more than or equal to 3 and less than or equal to 5.
Specifically, the set sub-pixels include n × m sub-pixels around the sub-pixel corresponding to the invalid luminance data, that is, the set sub-pixels include 3 × 3 sub-pixels, 3 × 4 sub-pixels, 3 × 5 sub-pixels, 4 × 3 sub-pixels, 4 × 4 sub-pixels, 4 × 5 sub-pixels, or 5 × 5 sub-pixels around the sub-pixel corresponding to the invalid luminance data. For example, when the first invalid luminance data is reset as needed, the setting sub-pixel may include 3 × 3 sub-pixels around the sub-pixel corresponding to the first invalid luminance data, and when the second invalid luminance data is compensated, the setting sub-pixel may include 3 × 3 sub-pixels or 4 × 4 sub-pixels around the sub-pixel corresponding to the second invalid luminance data, and the luminance data of the sub-pixel corresponding to the reset invalid luminance data may be equal to the average value of the valid luminance data of the setting sub-pixel.
By setting m to be more than or equal to 3 and less than or equal to 5 and n to be more than or equal to 3 and less than or equal to 5, the number of the setting sub-pixels corresponding to the sub-pixels corresponding to each ineffective brightness data is small, the number of the effective brightness data of the setting sub-pixels needing to be calculated is small, on one hand, the algorithm difficulty is reduced, on the other hand, the compensation effect of the ineffective brightness data of the auxiliary display area is prevented from being influenced by the large number of the setting sub-pixels, and the display panel is ensured to have a good compensation effect.
Optionally, fig. 6 is a schematic distribution diagram of the setting sub-pixels of the mura compensation method for the display panel according to the embodiment of the present invention. On the basis of the above embodiment, referring to fig. 6, the effective luminance data is arranged dispersedly in the set sub-pixels.
Specifically, referring to fig. 6, the 31 th row, the 32 th row, the 33 th row, the MA th column, the MB th column, and the MC th column are used to indicate the distribution of the set subpixels, and fig. 6 exemplarily shows a schematic diagram of the set subpixels centered on the subpixel MB32 having invalid luminance data equal to 0.407767, where m is 3 and n is 3 for the set subpixels MB31 having valid luminance data equal to 5.037236, MA33 having valid luminance data equal to 4.97824, and MC33 having valid luminance data equal to 5.076104 are dispersedly arranged. This arrangement can reduce the problem of display unevenness due to the aggregation of the respective effective luminance data.
Optionally, the number of n × m sub-pixels around the sub-pixel corresponding to different invalid luminance data is different.
Specifically, the specific values of n and m can be adjusted as required during calculation, so that the calculation difficulty of the invalid luminance data compensation is reduced, and the compensation effect of the invalid luminance data in the auxiliary display area is improved.
Optionally, fig. 7 is a flowchart of a mura compensation method of a display panel according to another embodiment of the present invention. On the basis of the above embodiment, referring to fig. 7, the mura compensation method for a display panel provided in the embodiment of the present invention includes:
s101, acquiring screen brightness data under a preset gray scale; the screen brightness data comprises main display area brightness data and auxiliary display area brightness data.
S201, dividing the brightness data of the auxiliary display area into effective brightness data and ineffective brightness data according to the comparison result of the brightness data of the auxiliary display area and a preset threshold value.
S102, searching invalid brightness data in the brightness data of the auxiliary display area.
S103, resetting the invalid brightness data to preset brightness data.
S501, according to the ratio of the average value of the reset auxiliary display area brightness data to the average value of the main display area effective brightness data, reducing the reset auxiliary display area brightness data in an equal proportion.
Specifically, the brightness data of each sub-pixel of the reset sub-display area are effective brightness data, the brightness data of the reset sub-display area is reduced in equal proportion according to the ratio of the average value of the brightness data of the reset sub-display area to the average value of the effective brightness data of the main display area, the brightness data of each sub-pixel of the sub-display area and the brightness data of the main display area can be consistent as much as possible, the reduced brightness data of the sub-display area is closer to the brightness data of the main display area, the compensation effect of the reset set sub-pixel is closer to the compensation effect of the effective brightness data of the sub-display area, the compensation precision is higher, the compensation effect of the sub-pixel corresponding to each effective brightness data of the sub-display area is better, and the display uniformity of the display panel is further improved.
And S105, performing demura compensation according to the reduced brightness data of the auxiliary display area.
Fig. 8 is a schematic structural diagram of a mura compensation apparatus of a display panel according to an embodiment of the present invention. On the basis of the above embodiments, referring to fig. 8, an embodiment of the present invention provides a mura compensation apparatus for a display panel, including:
a data obtaining module 51, configured to obtain screen brightness data at a preset gray scale; the screen brightness data comprises main display area brightness data and auxiliary display area brightness data;
the query module 52 is configured to search invalid luminance data in the luminance data of the secondary display area;
a data refreshing module 53, configured to reset the invalid luminance data to preset luminance data;
a data adjusting module 54, configured to reduce the reset sub-display region luminance data according to the reset sub-display region luminance data and main display region luminance data;
and the compensation module 55 is configured to perform demura compensation according to the reduced sub-display area brightness data.
The mura compensation device of the display panel provided by the embodiment comprises a data acquisition module, an inquiry module, a data refreshing module, a data adjusting module and a compensation module, wherein the data acquisition module is used for acquiring screen brightness data under a preset gray scale; the screen brightness data comprises main display area brightness data and auxiliary display area brightness data; searching invalid brightness data in the brightness data of the auxiliary display area through a query module; resetting the invalid luminance data to preset luminance data through a data updating module, wherein the preset luminance data may be equal to an average value of the valid luminance data of the set sub-pixels, for example; reducing the reset brightness data of the auxiliary display area through a data adjusting module 54 according to the reset brightness data of the auxiliary display area and the reset brightness data of the main display area; and performing demura compensation according to the reduced brightness data of the auxiliary display area by the compensation module, resetting invalid brightness data in the brightness data of the auxiliary display area to effective brightness data, enabling the brightness data of the auxiliary display area to be closer to the brightness data of the main display area, performing demura compensation according to the reduced brightness data of the auxiliary display area, and enabling the compensation effect of the reset set sub-pixels to be closer to the compensation effect of the effective brightness data of the auxiliary display area.
Fig. 9 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. 9, a display device 200 according to an embodiment of the present invention includes a display panel 300 and the mura compensation device 100 of the display panel according to any of the above embodiments, and the advantageous effects of the mura compensation device 100 of the display panel according to any of the above embodiments are not repeated herein. The display device 200 may include a mobile terminal such as a mobile phone and a wearable device.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles 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 greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A mura compensation method of a display panel, comprising:
acquiring screen brightness data under a preset gray scale; the screen brightness data comprises main display area brightness data and auxiliary display area brightness data;
searching invalid brightness data in the brightness data of the auxiliary display area;
resetting the invalid brightness data to preset brightness data; the preset brightness data is equal to the mean value of the effective brightness data of the set sub-pixels;
according to the reset brightness data of the auxiliary display area and the reset brightness data of the main display area, reducing the reset brightness data of the auxiliary display area so as to enable the brightness data of each sub-pixel of the auxiliary screen display area to be consistent with the brightness data of the main display area; wherein the main display area brightness data comprises main display area effective brightness data;
and performing demura compensation according to the reduced brightness data of the auxiliary display area.
2. The mura compensation method of the display panel according to claim 1, wherein,
the setting sub-pixel comprises n × m sub-pixels around the sub-pixel corresponding to the invalid brightness data; n m is an integer greater than or equal to 2.
3. The mura compensation method for a display panel according to claim 1, further comprising, before said searching for invalid luminance data in luminance data of said sub-display area:
and dividing the brightness data of the auxiliary display area into effective brightness data and ineffective brightness data according to the comparison result of the brightness data of the auxiliary display area and a preset threshold value.
4. The mura compensation method of claim 3 wherein the dividing the sub-display area luminance data into effective luminance data and ineffective luminance data according to the comparison of the sub-display area luminance data with a preset threshold comprises:
if the brightness data of the auxiliary display area is smaller than a first preset threshold value, the brightness data of the auxiliary display area is invalid brightness data; the preset threshold comprises a first preset threshold and a second preset threshold; the second preset threshold is greater than the first preset threshold;
and if the brightness data of the auxiliary display area is larger than a second preset threshold value, the brightness data of the auxiliary display area is effective brightness data.
5. The mura compensation method of the display panel according to claim 1, wherein resetting the ineffective luminance data to preset luminance data comprises:
and resetting the average value of the effective brightness data of the n-m sub-pixels taking the sub-pixel corresponding to the ineffective brightness data as the center as the brightness data of the sub-pixel corresponding to the ineffective brightness data.
6. The mura compensation method of a display panel according to claim 2,
the effective brightness data are distributed in the setting sub-pixels in a scattered mode.
7. The mura compensation method of a display panel according to claim 1,
the number of n × m sub-pixels around the sub-pixel corresponding to different invalid luminance data is different.
8. The mura compensation method of claim 1 wherein the reducing the reset sub-display luminance data according to the reset sub-display luminance data and main display luminance data comprises:
and according to the ratio of the average value of the reset auxiliary display area brightness data to the average value of the main display area effective brightness data, reducing the reset auxiliary display area brightness data in an equal proportion.
9. A mura compensation apparatus of a display panel, comprising:
the data acquisition module is used for acquiring screen brightness data under a preset gray scale; the screen brightness data comprise main display area brightness data and auxiliary display area brightness data;
the query module is used for searching invalid brightness data in the brightness data of the auxiliary display area;
the data refreshing module is used for resetting the invalid brightness data to preset brightness data; the preset brightness data is equal to the mean value of the effective brightness data of the set sub-pixels;
the data adjusting module is used for reducing the reset brightness data of the auxiliary display area according to the reset brightness data of the auxiliary display area and the reset brightness data of the main display area so as to enable the brightness data of each sub-pixel of the auxiliary screen display area to be consistent with the brightness data of the main display area; wherein the main display area brightness data comprises main display area effective brightness data;
and the compensation module is used for performing demura compensation according to the reduced brightness data of the auxiliary display area.
10. A display device, comprising: a display panel and a mura compensation apparatus of the display panel of claim 9.
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| WO2013035635A1 (en) * | 2011-09-07 | 2013-03-14 | シャープ株式会社 | Image display device and image display method |
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| CN107591134B (en) * | 2017-08-16 | 2020-08-04 | 深圳创维－Rgb电子有限公司 | MURA phenomenon compensation method, television and computer readable storage medium |
| CN108648722B (en) * | 2018-05-14 | 2021-01-22 | 京东方科技集团股份有限公司 | Brightness compensation method and device |
| CN108877631B (en) * | 2018-07-25 | 2021-09-10 | 昆山国显光电有限公司 | Mura compensation method and device for display screen, computer equipment and storage medium |
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| CN111816113A (en) * | 2020-07-29 | 2020-10-23 | 昆山工研院新型平板显示技术中心有限公司 | Brightness compensation method, device and equipment of display panel |
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