CN115188346A - Brightness compensation method of display module and display module - Google Patents
Brightness compensation method of display module and display module Download PDFInfo
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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Abstract
The invention provides a brightness compensation method of a display module and the display module; the method can determine the optimal compensation value according to the compensation brightness change of each region of the displayed picture of the display module under different compensation values, can realize the optimal compensation value of the dark band between COFs corresponding to all COFs only by collecting the pictures for at most four times, realizes the automatic determination of the compensation value, reduces the requirement on manpower, breaks through the limitation that the dark band between COFs can not be compensated on line, and relieves the technical problem that the dark band between COFs can not be compensated on line in the existing display module.
Description
Technical Field
The invention relates to the technical field of display, in particular to a brightness compensation method of a display module and the display module.
Background
The problem of dark bands among multiple COFs (Chip On Film) is a persistent problem which plagues TFT-LCD (Thin Film Transistor Liquid Crystal Display) panels and is caused by the non-uniform charging rate due to Fan-out resistance difference in the COFs.
Aiming at the problems, currently, professional technicians are required to manually try to perform display compensation on display sub-regions corresponding to COFs, the method depends on manual judgment, and the efficiency is low.
Therefore, an improvement is needed to solve the technical problem of the conventional multi-COF display module that the dark bands between the COFs cannot be compensated online.
Disclosure of Invention
The invention provides a brightness compensation method of a display module and the display module, which are used for solving the technical problem that a dark band between COFs (chip on film) of the conventional display module cannot be compensated on line.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the embodiment of the invention provides a brightness compensation method of a display module, which is applied to the display module, wherein the display module comprises a display panel and a plurality of chip on films which are electrically connected with the display panel, a display area of the display panel comprises a plurality of display subareas, and each chip on film drives the corresponding display subarea, and the method comprises the following steps:
s1, according to a picture of the display panel shot by a camera, identifying a first area of a plurality of display sub-areas and acquiring an initial compensation value of the first area, wherein the plurality of display sub-areas comprise the first area and a second area, and the initial brightness of the first area is smaller than that of the second area;
s2, performing first compensation on the display area according to a preset maximum compensation value;
s3, acquiring first compensation brightness of the first area and the second area according to the picture of the display panel after the first compensation, which is shot by the camera, and judging whether to perform subsequent compensation according to a comparison result of the first compensation brightness of the first area and the second area;
wherein, S3 includes: s30, when the first compensation brightness of the first area is larger than the first compensation brightness of the second area, performing second compensation on the display area according to a second compensation value related to the maximum compensation value and the initial compensation value;
s4, acquiring second compensation brightness of the first area and the second area according to the picture of the display panel after the second compensation, which is shot by the camera, and performing third compensation on the display area by using a third compensation value according to a comparison result of the second compensation brightness of the first area and the second area;
and S5, acquiring third compensation brightness of the first area and the second area according to the picture of the display panel after the third compensation shot by the camera, and determining a final compensation value according to a comparison result of the third compensation brightness of the first area and the second area and the initial brightness of the first area and the second area.
In the brightness compensation method of the display module according to the embodiment of the present invention, the second compensation value is an average value of the maximum compensation value and the initial compensation value.
In the brightness compensation method of the display module according to the embodiment of the present invention, the S4 includes:
s40, when the second compensation brightness of the first region is less than the second compensation brightness of the second region, the third compensation value is related to the second compensation value and the maximum compensation value.
In the brightness compensation method of the display module according to the embodiment of the present invention, the third compensation value is an average value of the second compensation value and the maximum compensation value.
In the brightness compensation method of a display module provided in the embodiment of the present invention, the S4 includes:
s41, when the second compensation brightness of the first region is greater than the second compensation brightness of the second region, and the brightness waveform corresponding to the second compensation brightness of the first region and the second region is smoother than the brightness waveform corresponding to the first compensation brightness of the first region and the second region, the third compensation value is related to the second compensation value and the initial compensation value.
In the brightness compensation method of the display module provided in the embodiment of the present invention, the third compensation value is an average value of the second compensation value and the initial compensation value.
In the brightness compensation method of the display module according to the embodiment of the present invention, the S5 includes:
s50, when the brightness waveforms corresponding to the third compensation brightness of the first and second areas are smoother than the brightness waveforms corresponding to the initial brightness of the first and second areas, the final compensation value is the third compensation value.
In the brightness compensation method of the display module according to the embodiment of the present invention, the S5 includes:
s51, when the brightness waveforms corresponding to the third compensated luminances of the first and second areas are steeper than the brightness waveforms corresponding to the initial luminances of the first and second areas, the final compensation value is: and the initial compensation value, the maximum compensation value, and the compensation value corresponding to the most gentle brightness waveform in the brightness waveforms of the first area and the second area corresponding to the first compensation value and the second compensation value.
In the brightness compensation method for a display module provided in the embodiment of the present invention, the S3 further includes:
s31, when the first compensation brightness of the first region is smaller than the first compensation brightness of the second region, and the brightness waveforms corresponding to the first compensation brightness of the first region and the second region are smoother than the brightness waveforms corresponding to the initial brightness of the first region and the second region, taking the maximum compensation value as a final compensation value.
Further, an embodiment of the present invention further provides a display module, where the display module includes a display panel and a plurality of flip-chip mounted films electrically connected to the display panel, a display area of the display panel includes a plurality of display sub-areas, and each of the flip-chip mounted films drives a corresponding display sub-area; the COF memory has the final compensation value obtained by the method.
The beneficial effects of the invention are as follows: the invention provides a brightness compensation method of a display module and the display module; the brightness compensation method of the display module is applied to the display module, the display module comprises a display panel and a plurality of chip on films which are electrically connected with the display panel, the display area of the display panel comprises a plurality of display subareas, and each chip on film drives the corresponding display subarea, and the method comprises the following steps: s1, according to a picture of the display panel shot by a camera, identifying a first area of a plurality of display sub-areas and acquiring an initial compensation value of the first area, wherein the plurality of display sub-areas comprise the first area and a second area, and the initial brightness of the first area is smaller than that of the second area; s2, performing first compensation on the display area according to a preset maximum compensation value; s3, acquiring first compensation brightness of the first area and the second area according to the picture of the display panel after the first compensation shot by the camera, and judging whether to perform subsequent compensation according to a comparison result of the first compensation brightness of the first area and the second area; wherein, S3 includes: s30, when the first compensation brightness of the first area is larger than the first compensation brightness of the second area, performing second compensation on the display area according to a second compensation value related to the maximum compensation value and the initial compensation value; s4, acquiring second compensation brightness of the first area and the second area according to the picture of the display panel after the second compensation, which is shot by the camera, and performing third compensation on the display area by using a third compensation value according to a comparison result of the second compensation brightness of the first area and the second area; and S5, acquiring third compensation brightness of the first area and the second area according to a picture of the display panel after third compensation shot by the camera, and determining a final compensation value according to a comparison result of the third compensation brightness of the first area and the second area and the initial brightness of the first area and the second area. The embodiment of the invention provides a compensation method for a dark band between COFs (chip on film) of a multi-COF (chip on film) display module, which can determine an optimal compensation value according to compensation brightness changes of all areas of a displayed picture of the display module under different compensation values, can realize the optimal compensation value of the dark band between COFs (chip on film) corresponding to at most four picture acquisitions, realizes the automatic determination of the compensation value, reduces the requirement on manpower, breaks through the limitation that the dark band between COFs cannot be compensated on line, and relieves the technical problem that the dark band between COFs cannot be compensated on line in the conventional display module.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1a and fig. 1b are schematic structural diagrams of a display module according to an embodiment of the present invention;
FIG. 2 is a schematic flowchart illustrating a luminance compensation method according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a brightness compensation method according to an embodiment of the present invention;
FIG. 4 is a schematic flowchart illustrating a luminance compensation method according to another embodiment of the present invention;
fig. 5 to 8 are schematic images according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Aiming at the technical problem that the hidden tape between COFs of the conventional multi-COF display module cannot be compensated online, the embodiment of the invention can be relieved.
The display module according to the present application will now be described with reference to fig. 1a and 1 b.
As shown in fig. 1a, the display module according to the present application includes a display panel 10 and a plurality of flip-chip films 20 electrically connected to the display panel 10, a display area AA of the display panel 10 includes a plurality of display sub-areas S, and each of the flip-chip films 20 drives the corresponding display sub-area S (as shown in fig. 6, the display area includes 6 display sub-areas S).
As shown in fig. 1b, the Fan-out (Fan-out) signal lines in each display sub-area S have different resistances, which results in non-uniform charging rates of sub-pixels in different columns, and further dark bands as shown in fig. 5 occur: when the same gray scale voltage is written into all the display sub-regions S, some regions are bright (the region corresponding to the signal line has a smaller resistance in the fan-out region, i.e. the second region S2 hereinafter), and other regions are dark (the region corresponding to the signal line has a larger resistance in the fan-out region, i.e. the first region S1 hereinafter), and these dark bands need to be compensated, so as to make the picture displayed by the display panel 10 as uniform as possible.
In order to solve the above problem, the present application provides a brightness compensation method for a display module, and specifically, the brightness compensation method for a display module provided by the present application is applied to the display module shown in fig. 1a, and as shown in fig. 2, the method includes the following steps:
s1, according to a picture of the display panel shot by a camera, identifying a first area of a plurality of display sub-areas and acquiring an initial compensation value of the first area, wherein the plurality of display sub-areas comprise the first area and a second area, and the initial brightness of the first area is smaller than that of the second area.
In an embodiment, at time t1, the display module operates with the initial compensation value to display a pure color image at a certain gray level, and a camera is used to capture an image displayed on the display panel, as shown in fig. 5, a dark band appears at this time, in fig. 5, different gray shades represent different luminances, and a gray shade in a certain area represents a high luminance in the corresponding area, otherwise, a gray shade in a certain area represents a low luminance in the corresponding area. At this time, the plurality of display sub-regions S in fig. 6 corresponding to fig. 5 are divided into a first region S1 and a second region S2 according to the difference of the initial brightness, and the initial brightness of the first region is smaller than the initial brightness of the second region.
Because the brightness intensity is difficult to directly reflect the difference, other embodiments of the present application quantize the brightness intensity (convert the actual brightness value and the maximum brightness value to obtain the gray-scale brightness, which is an arbitrary value between 0 and 255, or between 0 and 127, or between 0 and 511) to obtain a gray-scale-position variation curve w shown in fig. 6, and it can be visually seen from the curve w that the brightness of the picture displayed by the display panel periodically alternates between dark and bright with the change of the position (horizontal axis), and the variation curves of each display sub-region are different.
And S2, performing first compensation on the display area according to a preset maximum compensation value.
And S3, acquiring first compensation brightness of the first area and the second area according to the picture of the display panel after the first compensation shot by the camera, and judging whether to perform subsequent compensation according to a comparison result of the first compensation brightness of the first area and the second area.
In an embodiment, at time t2, each COF in the display module operates at the maximum compensation value corresponding to the display sub-area to display the pure color picture, a camera is used to capture the picture displayed by the display panel, and first compensation brightness (gray scale brightness and other brightness values of each first area and second area after first compensation) of each first area and second area is obtained, and then whether to perform subsequent compensation is determined according to a comparison result of the first compensation brightness of the first area and the second area.
Wherein, S3 includes: s30, when the first compensation brightness of the first area is larger than the first compensation brightness of the second area, performing second compensation on the display area according to a second compensation value related to the maximum compensation value and the initial compensation value; or, S31, when the first compensation brightness of the first region is smaller than the first compensation brightness of the second region, and the brightness waveforms corresponding to the first compensation brightness of the first region and the second region are smoother than the brightness waveforms corresponding to the initial brightness of the first region and the second region, setting the maximum compensation value as a final compensation value.
In one embodiment, the second compensation value is an average of the maximum compensation value and the initial compensation value. The embodiment can ensure better compensation effect while reducing the calculation amount.
In an embodiment, with reference to fig. 6, the picture collected in step S2 (the picture at time t 2) is quantized to obtain a change curve of the first compensation brightness root position, and the change curve is compared with the curve shown in fig. 6 to obtain a comparison curve shown in fig. 7.
As shown in fig. 7, the first compensated luminance curve may show 3 curves as shown in fig. 7: curve a, curve b, curve c; for a display sub-area where a curve a or a curve b appears, directly executing step S31 to take the maximum compensation value as a final compensation value, where the first compensation brightness conforming to the first area is less than the first compensation brightness of the second area, and brightness waveforms corresponding to the first compensation brightness of the first area and the second area are gentler than brightness waveforms corresponding to the initial brightness of the first area and the second area; and directly executing the step S30 for the display subarea with the curve c according to the scene that the first compensation brightness of the first area is larger than the first compensation brightness of the second area, and performing second compensation on the display area according to a second compensation value related to the maximum compensation value and the initial compensation value.
And S4, acquiring second compensation brightness of the first area and the second area according to the picture of the display panel after the second compensation shot by the camera, and performing third compensation on the display area by using a third compensation value according to a comparison result of the second compensation brightness of the first area and the second area.
Wherein, S4 includes: s40, when the second compensation brightness of the first region is less than the second compensation brightness of the second region, the third compensation value is related to the second compensation value and the maximum compensation value; or, S41, when the second compensation brightness of the first region is greater than the second compensation brightness of the second region, and the brightness waveforms corresponding to the second compensation brightness of the first region and the second region are smoother than the brightness waveforms corresponding to the first compensation brightness of the first region and the second region, the third compensation value is related to the second compensation value and the initial compensation value.
In an embodiment, in a scenario corresponding to S40, the third compensation value is an average value of the second compensation value and the maximum compensation value; and in the scenario corresponding to S41, the third compensation value is an average value of the second compensation value and the initial compensation value. Similarly, the embodiment can ensure better compensation effect while reducing the calculation amount.
In an embodiment, at time t3, each COF in the display module operates with the second compensation value corresponding to the display sub-area to display the pure color image, the camera is used to capture the image displayed by the display panel, and the second compensation brightness (the brightness values such as gray scale brightness and the like of each of the first area and the second area after the second compensation) of each of the first area and the second area is obtained, and then the step is executed.
In an embodiment, with reference to fig. 7, the picture collected in step S4 (the picture at time t 3) is quantized to obtain a change curve of the second compensation brightness root position, and the change curve is compared with the curve shown in fig. 7 to obtain a comparison curve shown in fig. 8.
As shown in fig. 8, the second curve of the compensated luminance may have 2 curves as shown in fig. 8: curve d and curve e; directly executing step S40 for a sub-display area where a curve d appears, in a scene where the second compensation brightness in accordance with the first area is less than the second compensation brightness in the second area, where the third compensation value is related to the second compensation value and the maximum compensation value, and performing third compensation on the sub-display area by using the third compensation value; and for a display sub-area with a curve e, directly executing step S41 in a scene where the second compensation brightness corresponding to the second compensation brightness of the first area is greater than the second compensation brightness of the second area, and the brightness waveforms corresponding to the second compensation brightness of the first area and the second area are smoother relative to the brightness waveforms corresponding to the first compensation brightness of the first area and the second area, where the third compensation value is related to the second compensation value and the initial compensation value, and performing a third compensation on the display area according to the third compensation value.
And S5, acquiring third compensation brightness of the first area and the second area according to the picture of the display panel after the third compensation shot by the camera, and determining a final compensation value according to a comparison result of the third compensation brightness of the first area and the second area and the initial brightness of the first area and the second area.
Wherein, S5 includes: s50, when the brightness waveforms corresponding to the third compensation brightness of the first and second regions are smoother than the brightness waveforms corresponding to the initial brightness of the first and second regions, the final compensation value is the third compensation value; or, S51, when the brightness waveforms corresponding to the third compensated luminances of the first and second regions are steeper than the brightness waveforms corresponding to the initial luminances of the first and second regions, the final compensation value is: and the initial value, the maximum compensation value, and the compensation value corresponding to the most gentle brightness waveform in the brightness waveforms of the first area and the second area corresponding to the first compensation value and the second compensation value.
In an embodiment, at time t4, each COF in the display module operates with the third compensation value corresponding to the display sub-area to display the pure color image, a camera is used to capture the image displayed by the display panel, and third compensation brightness (brightness values such as gray scale brightness and the like of each of the first area and the second area after the third compensation) of each of the first area and the second area is obtained, and then the step is executed.
In an embodiment, referring to fig. 8, the picture (the picture at the time t 4) acquired in step S5 is quantized to obtain a third curve of variation of the compensation brightness and the position (the curve is similar to the other curves, so a schematic diagram is not shown, and reference may be made to the curves in the other figures), and the third curve is compared with the curve shown in fig. 8.
If the comparison result shows that: the brightness waveforms corresponding to the third compensation brightness of the first and second areas are gentler than the brightness waveforms corresponding to the initial brightness of the first and second areas, and at this time, step S50 is performed to determine the final compensation value as the third compensation value; or, the brightness waveform corresponding to the third compensation brightness representing the first and second areas is steeper than the brightness waveform corresponding to the initial brightness of the first and second areas, in this case, step S51 is performed, and the final compensation value is: the initial compensation value, the maximum compensation value, and the compensation value corresponding to the gentlest brightness waveform in the brightness waveforms of the first area and the second area corresponding to the first compensation value and the second compensation value may be determined according to the visual comparison of the curves in the several previous figures.
To sum up, the embodiment of the application provides a dark band compensation method between COFs of a multi-COF display module, the method can determine the optimal compensation value according to the compensation brightness change of each region of the displayed picture of the display module under different compensation values, the optimal compensation value of the dark band between COFs corresponding to all COFs can be achieved only by collecting the pictures for four times at most, the automatic determination of the compensation value is achieved, the requirement on labor is reduced, the limitation that the dark band between COFs cannot be compensated on line is broken through, and the technical problem that the dark band between COFs cannot be compensated on line in the existing display module is solved.
The embodiment shown in fig. 2 is illustrated with the first and second areas in the display sub-area as separate compensation areas, and now with the scenario in which the display sub-area is compensated as a whole.
As shown in fig. 3, in this scenario, the method is used to perform management burning on the compensation parameters of the display device; the display device comprises a display panel and at least two circuit boards electrically connected to the display panel, wherein the circuit boards are provided with driving chips, the display panel comprises at least two display areas, and the display areas correspond to the driving chips; the management method comprises the steps of managing and burning compensation parameters of the display device; the display device comprises a display panel and at least two circuit boards electrically connected to the display panel, wherein the circuit boards are provided with driving chips, the display panel comprises at least two display areas, and the display areas correspond to the driving chips; the method comprises the following steps:
s301, controlling each driving chip in the display device to display a detection pattern at a first moment based on the initial gray scale compensation value of the corresponding display area.
S302, a camera acquires display content of the display device at the first time to obtain a first pattern, that is, a picture shown in fig. 5, and performs quantization processing on the first pattern to obtain a first quantized pattern, that is, a picture shown in fig. 6.
And S303, controlling each driving chip in the display device to display the detection pattern at a second moment based on the maximum gray scale compensation value of the corresponding display area.
S304, acquiring the display content of the display device at the second moment through the camera to obtain a second pattern, and performing quantization processing on the second pattern to obtain a second quantized pattern.
S305, determining an actual compensation value of each display area according to a comparison result of the first quantization pattern and the second quantization pattern.
And S306, burning the actual compensation value of each display area to the driving chip corresponding to each display area.
In one embodiment, determining the actual compensation value of each display area according to the comparison result of the first quantization pattern and the second quantization pattern includes:
comparing the first gray scale position curve (shown in the schematic diagram of fig. 6) of each display area in the first quantization pattern with the second gray scale position curve (shown in the schematic diagram of fig. 7) of each display area in the second quantization pattern to obtain the relative position of the first curve of each display area;
determining the display area (namely the area corresponding to the curve a and the curve b in the figure 7) of which the relative position of the first curve represents the non-inverted gray scale position curve as a first display area, and determining the other display areas as a second display area (namely the area corresponding to the curve c in the figure 7);
and determining the maximum gray scale compensation value of each first display area as the actual compensation value of each first display area.
In one embodiment, the steps of the previous embodiment further comprise:
controlling a driving chip corresponding to each second display area in the display device to display the detection pattern at a third moment based on the first gray scale compensation value of the corresponding display area; the first gray scale compensation value is determined according to the initial gray scale compensation value and the maximum gray scale compensation value;
acquiring the display content of the display device at the third moment through the camera to obtain a third pattern, and performing quantization processing on the third pattern to obtain a third quantized pattern;
obtaining a schematic diagram shown in fig. 8 according to a comparison result of the first quantized pattern, the second quantized pattern, and the third quantized pattern, and determining a third display area and a fourth display area in each second display area;
controlling the driving chip corresponding to each third display area in the display device to display the detection pattern at a fourth time based on the second gray scale compensation value of the corresponding display area, and controlling the driving chip corresponding to each fourth display area in the display device to display the detection pattern at the fourth time based on the third gray scale compensation value of the corresponding display area;
acquiring the display content of the display device at the fourth moment through the camera to obtain a fourth pattern, and performing quantization processing on the fourth pattern to obtain a fourth quantized pattern;
and determining the actual compensation value of each second display area according to the comparison result of the first quantization pattern and the fourth quantization pattern.
In an embodiment, determining a third display area and a fourth display area in each of the second display areas according to a comparison result of the first quantization pattern, the second quantization pattern and the third quantization pattern includes:
comparing the first gray scale position curve of each second display area in the first quantization pattern, the second gray scale position curve of each second display area in the second quantization pattern and the third gray scale position curve of each second display area in the third quantization pattern to obtain the relative position of the second curve of each second display area;
and determining the second display area, in which the second curve relative position represents that the third gray-scale position curve is close to the first gray-scale position curve (curve w), as a third display area (an area corresponding to curve d in fig. 8), and determining the other second display areas as fourth display areas (an area corresponding to curve e in fig. 8).
In one embodiment, the second gray scale compensation value is determined according to the first gray scale compensation value and the maximum gray scale compensation value, and the third gray scale compensation value is determined according to the first gray scale compensation value and the initial gray scale compensation value.
In an embodiment, determining an actual compensation value of each of the second display regions according to a comparison result of the first quantization pattern and the fourth quantization pattern includes:
comparing the waveform flat parameters of the first gray scale position curves of the second display areas in the first quantization patterns with the waveform flat parameters of the fourth gray scale position curves of the second display areas in the fourth quantization patterns to obtain a waveform flat comparison result; the waveform flat parameters comprise flat degree and the like;
determining the second display area with the gentle waveform comparison result representing that the fourth gray-scale position curve is gentler than the first gray-scale position curve as a fifth display area, and determining other second display areas as sixth display areas;
and determining the second gray scale compensation value or the third gray scale compensation value of each fifth display area at the fourth moment as the actual compensation value of each fifth display area.
In one embodiment, the steps of the previous embodiment further comprise:
determining a target quantization pattern with the most gentle waveform flat parameter corresponding to each sixth display area from the first quantization pattern, the second quantization pattern, the third quantization pattern and the fourth quantization pattern according to the waveform flat parameter of the first gray-scale position curve of each sixth display area in the first quantization pattern, the waveform flat parameter of the second gray-scale position curve of each sixth display area in the second quantization pattern, the waveform flat parameter of the third gray-scale position curve of each sixth display area in the third quantization pattern and the waveform flat parameter of the fourth gray-scale position curve of each sixth display area in the fourth quantization pattern;
and determining the gray scale compensation value corresponding to the target quantization pattern of each sixth display area as the actual compensation value of each sixth display area.
In one embodiment, the detection pattern comprises a plurality of patterns of different gray levels and/or different single colors comprising at least one of red, blue and green. The embodiment can complete the correction of the multi-gray scale interval of the multi-color sub-pixel.
In one embodiment, the application further provides a management system for the compensation parameters of the display device, which is used for managing and burning the compensation parameters of the display device; the display device comprises a display panel and at least two circuit boards electrically connected to the display panel, wherein the circuit boards are provided with driving chips, the display panel comprises at least two display areas, and the display areas correspond to the driving chips; the management system comprises a host and a camera, wherein the host comprises a control module, a processing module and a burning module, and the management system comprises the following components:
the control module is used for controlling each driving chip in the display device to display a detection pattern at a first moment based on the initial gray scale compensation value of the corresponding display area;
the processing module is used for acquiring the display content of the display device at the first moment to obtain a first pattern, and performing quantization processing on the first image to obtain a first quantized pattern;
the control module is further used for controlling each driving chip in the display device to display the detection pattern at a second moment based on the maximum gray scale compensation value of the corresponding display area;
the processing module is further configured to acquire display content of the display device at the second moment to obtain a second pattern, and perform quantization processing on the second image to obtain a second quantized pattern;
the processing module is further configured to determine an actual compensation value of each display area according to a comparison result of the first quantization pattern and the second quantization pattern;
the burning module is used for burning the actual compensation value of each display area to the driving chip corresponding to each display area.
In an embodiment, the present application further provides a display device, which includes a display panel and at least two circuit boards electrically connected to the display panel, where the circuit boards are provided with driving chips, the display panel includes at least two display areas, the display areas correspond to the driving chips, the driving chips store actual compensation values for compensating dark bands between the circuit boards, and the actual compensation values are obtained by the foregoing method.
In an embodiment, the present application further provides a display module, where the display module includes a display panel and a plurality of flip-chip films electrically connected to the display panel, a display area of the display panel includes a plurality of display sub-areas, and each of the flip-chip films drives a corresponding display sub-area; the flip-chip storage has the final compensation value obtained by the method.
Now, the present application is further described with reference to a scenario, as shown in fig. 4, the compensation method provided by the present application includes the following steps:
step1: a camera is used to take a heavy load picture and identify the dark tape area between COFs as follows. And carrying out quantization according to the picture result.
In this embodiment, each COF region has an initial compensation value, which is calculated
After this step is performed, the initial picture shown in fig. 5 is obtained, and after quantization, the variation curve shown in fig. 6 is obtained.
Step2: for the first compensation, the upper limit value of the corresponding area is written into the control chip (Tcon) of the COF and is counted as
And shooting a heavy-load picture by using a camera, identifying a dark band area between COFs, and quantizing according to a picture result.
After this step is performed, the variation curve shown in fig. 7 is obtained. In fig. 7, curves a and b appear, illustrating that this region cannot be further optimized,
the compensation value of the area is obtained; when curve c appears, step3 compensation is required.
Step3: the second compensation, writing the mean value of the initial value and the upper limit value of the corresponding area into the Tcon, and counting as
And taking a picture and quantizing the data.
After the step is executed, the curve shown in fig. 8 is obtained, that is, only the curve d and the curve e appear after the second compensation, when the curve d appears, setp5 is executed, and when the curve e appears, shep4 is executed.
Step4: third compensation, writing initial value sum of corresponding region into Tcon
Is a mean value of
Step5: third time of compensation, writing corresponding region into Tcon
The mean value of the value and the upper limit value (maximum compensation value) is calculated as
Step6: the camera takes a picture, performs data quantization, and compares the data with the initial data.
The step is mainly to compare the initial waveform with the improved waveform, determine whether the improved waveform is flat, if not, call the best result in the compensation period as a parameter (namely an actual compensation value), and if so, take the value used in the third compensation as a parameter.
According to the above embodiments:
the invention provides a brightness compensation method of a display module and the display module; the brightness compensation method of the display module is applied to the display module, the display module comprises a display panel and a plurality of chip on films which are electrically connected with the display panel, the display area of the display panel comprises a plurality of display subareas, and each chip on film drives the corresponding display subarea, and the method comprises the following steps: s1, according to a picture of the display panel shot by a camera, identifying a first area of a plurality of display sub-areas and acquiring an initial compensation value of the first area, wherein the plurality of display sub-areas comprise the first area and a second area, and the initial brightness of the first area is smaller than that of the second area; s2, performing first compensation on the display area according to a preset maximum compensation value; s3, acquiring first compensation brightness of the first area and the second area according to the picture of the display panel after the first compensation, which is shot by the camera, and judging whether to perform subsequent compensation according to a comparison result of the first compensation brightness of the first area and the second area; wherein, S3 includes: s30, when the first compensation brightness of the first area is larger than the first compensation brightness of the second area, performing second compensation on the display area according to a second compensation value related to the maximum compensation value and the initial compensation value; s4, according to the picture of the display panel after the second compensation, which is shot by the camera, second compensation brightness of the first area and the second area is obtained, and third compensation is carried out on the display area through a third compensation value according to a comparison result of the second compensation brightness of the first area and the second area; and S5, acquiring third compensation brightness of the first area and the second area according to the picture of the display panel after the third compensation shot by the camera, and determining a final compensation value according to a comparison result of the third compensation brightness of the first area and the second area and the initial brightness of the first area and the second area. The embodiment of the invention provides a compensation method for a dark band between COFs (chip on film) of a multi-COF (chip on film) display module, which can determine an optimal compensation value according to compensation brightness changes of all areas of a displayed picture of the display module under different compensation values, can realize the optimal compensation value of the dark band between COFs (chip on film) corresponding to at most four picture acquisitions, realizes the automatic determination of the compensation value, reduces the requirement on manpower, breaks through the limitation that the dark band between COFs cannot be compensated on line, and relieves the technical problem that the dark band between COFs cannot be compensated on line in the conventional display module.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A brightness compensation method of a display module is applied to a display module, the display module comprises a display panel and a plurality of chip on films which are electrically connected with the display panel, the display area of the display panel comprises a plurality of display subareas, each chip on film drives the corresponding display subarea, and the method comprises the following steps:
s1, according to a picture of the display panel shot by a camera, identifying a first area of a plurality of display sub-areas and acquiring an initial compensation value of the first area, wherein the plurality of display sub-areas comprise the first area and a second area, and the initial brightness of the first area is smaller than that of the second area;
s2, performing first compensation on the display area according to a preset maximum compensation value;
s3, acquiring first compensation brightness of the first area and the second area according to the picture of the display panel after the first compensation shot by the camera, and judging whether to perform subsequent compensation according to a comparison result of the first compensation brightness of the first area and the second area;
wherein, S3 includes: s30, when the first compensation brightness of the first area is larger than the first compensation brightness of the second area, performing second compensation on the display area according to a second compensation value related to the maximum compensation value and the initial compensation value;
s4, acquiring second compensation brightness of the first area and the second area according to the picture of the display panel after the second compensation, which is shot by the camera, and performing third compensation on the display area by using a third compensation value according to a comparison result of the second compensation brightness of the first area and the second area;
and S5, acquiring third compensation brightness of the first area and the second area according to a picture of the display panel after third compensation shot by the camera, and determining a final compensation value according to a comparison result of the third compensation brightness of the first area and the second area and the initial brightness of the first area and the second area.
2. The method of claim 1, wherein the second compensation value is an average of the maximum compensation value and the initial compensation value.
3. The method of claim 1, wherein the S4 comprises:
s40, when the second compensation brightness of the first region is less than the second compensation brightness of the second region, the third compensation value is related to the second compensation value and the maximum compensation value.
4. The method of claim 3, wherein the third compensation value is an average of the second compensation value and the maximum compensation value.
5. The method according to claim 1, wherein the S4 comprises:
s41, when the second compensation brightness of the first region is greater than the second compensation brightness of the second region, and the brightness waveforms corresponding to the second compensation brightness of the first and second regions are smoother than the brightness waveforms corresponding to the first compensation brightness of the first and second regions, the third compensation value is related to the second compensation value and the initial compensation value.
6. The method of claim 5, wherein the third compensation value is an average of the second compensation value and the initial compensation value.
7. The method according to claim 1, wherein the S5 comprises:
s50, when the brightness waveforms corresponding to the third compensation brightness of the first and second areas are smoother than the brightness waveforms corresponding to the initial brightness of the first and second areas, the final compensation value is the third compensation value.
8. The method according to claim 1, wherein the S5 comprises:
s51, when the brightness waveforms corresponding to the third compensated luminances of the first and second areas are steeper than the brightness waveforms corresponding to the initial luminances of the first and second areas, the final compensation value is: and the initial compensation value, the maximum compensation value, and the compensation value corresponding to the most gentle brightness waveform in the brightness waveforms of the first area and the second area corresponding to the first compensation value and the second compensation value.
9. The method of claim 1, wherein the S3 further comprises:
s31, when the first compensation brightness of the first region is smaller than the first compensation brightness of the second region, and the brightness waveforms corresponding to the first compensation brightness of the first region and the second region are smoother than the brightness waveforms corresponding to the initial brightness of the first region and the second region, taking the maximum compensation value as a final compensation value.
10. A display module is characterized by comprising a display panel and a plurality of chip on films electrically connected to the display panel, wherein the display area of the display panel comprises a plurality of display sub-areas, and each chip on film drives the corresponding display sub-area; the chip on film memory has a final compensation value obtained by the method according to any one of claims 1 to 9.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100328339A1 (en) * | 2009-06-30 | 2010-12-30 | Cho Joo Woan | Display Apparatus and Method of Driving the Same |
| US20140210841A1 (en) * | 2011-06-28 | 2014-07-31 | Hisense Hiview Tech Co., Ltd. | Method, device and system for compensating brightness of a liquid crystal module |
| CN106328079A (en) * | 2016-08-25 | 2017-01-11 | 深圳市华星光电技术有限公司 | Image brightness compensation method |
| CN107657932A (en) * | 2017-11-17 | 2018-02-02 | 深圳市华星光电半导体显示技术有限公司 | The gray scale compensation data detection method of liquid crystal display panel |
| CN108831393A (en) * | 2018-06-27 | 2018-11-16 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display panel Mura compensation optimizing method and optimization system |
| EP3561803A1 (en) * | 2018-04-27 | 2019-10-30 | Samsung Display Co., Ltd. | Degradation compensator, display device having the same, and method for compensating image data of the display device |
| CN111048053A (en) * | 2020-01-03 | 2020-04-21 | Tcl华星光电技术有限公司 | Liquid crystal display device and driving method thereof |
| CN113257167A (en) * | 2021-05-13 | 2021-08-13 | Tcl华星光电技术有限公司 | Display picture compensation method |
| US20210358406A1 (en) * | 2018-05-02 | 2021-11-18 | Boe Technology Group Co., Ltd. | Optical compensation method and device, display device, display method and storage medium |
| CN113963658A (en) * | 2020-07-21 | 2022-01-21 | Oppo广东移动通信有限公司 | Brightness compensation method, brightness data determination method, device and chip |
| KR20220027012A (en) * | 2020-08-26 | 2022-03-07 | 삼성전자주식회사 | Electronic device adjusting quality of display device and operating method thereof |
-
2022
- 2022-07-27 CN CN202210892210.0A patent/CN115188346B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100328339A1 (en) * | 2009-06-30 | 2010-12-30 | Cho Joo Woan | Display Apparatus and Method of Driving the Same |
| US20140210841A1 (en) * | 2011-06-28 | 2014-07-31 | Hisense Hiview Tech Co., Ltd. | Method, device and system for compensating brightness of a liquid crystal module |
| CN106328079A (en) * | 2016-08-25 | 2017-01-11 | 深圳市华星光电技术有限公司 | Image brightness compensation method |
| CN107657932A (en) * | 2017-11-17 | 2018-02-02 | 深圳市华星光电半导体显示技术有限公司 | The gray scale compensation data detection method of liquid crystal display panel |
| EP3561803A1 (en) * | 2018-04-27 | 2019-10-30 | Samsung Display Co., Ltd. | Degradation compensator, display device having the same, and method for compensating image data of the display device |
| US20210358406A1 (en) * | 2018-05-02 | 2021-11-18 | Boe Technology Group Co., Ltd. | Optical compensation method and device, display device, display method and storage medium |
| CN108831393A (en) * | 2018-06-27 | 2018-11-16 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display panel Mura compensation optimizing method and optimization system |
| US20210118394A1 (en) * | 2018-06-27 | 2021-04-22 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Mura compensation optimization method and system for liquid crystal display panel |
| CN111048053A (en) * | 2020-01-03 | 2020-04-21 | Tcl华星光电技术有限公司 | Liquid crystal display device and driving method thereof |
| CN113963658A (en) * | 2020-07-21 | 2022-01-21 | Oppo广东移动通信有限公司 | Brightness compensation method, brightness data determination method, device and chip |
| KR20220027012A (en) * | 2020-08-26 | 2022-03-07 | 삼성전자주식회사 | Electronic device adjusting quality of display device and operating method thereof |
| CN113257167A (en) * | 2021-05-13 | 2021-08-13 | Tcl华星光电技术有限公司 | Display picture compensation method |
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