CN109658864B - Display panel display processing method and display processing device - Google Patents
Display panel display processing method and display processing device Download PDFInfo
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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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 embodiment of the application provides a display panel, which records the display voltage and the display brightness of each sub-pixel; generating a relation curve of the display voltage and the brightness of each sub-pixel according to the display voltages, and calculating the relation curve of the display voltage and the average brightness; mapping the relation curve of each sub-pixel to the relation curve of the display voltage and the average brightness through a corresponding coefficient; storing the corresponding coefficient of each sub-pixel and the relation curve of the display voltage and the average brightness into a driving chip; and sending the display data to a driving chip, calling the corresponding coefficient and the relation curve of the display voltage and the average brightness, processing and transmitting the processed display data to a display panel. The method and the device can eliminate mura of each gray scale, and can improve image display effect in low-brightness and high-brightness modes.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of display technologies, and in particular, to a display processing method and a display processing apparatus for a display panel.
[ background of the invention ]
With the long-term development of display technologies, consumers have higher and higher requirements on display effects of display devices, consumers cannot accept poor display of display panels, such as mura (moire), currently, three methods for solving the poor display are mainly 1, compensation methods of a TFT circuit, a more complex pixel circuit is often required to be designed to compensate threshold deviation of a TFT tube, a complex circuit structure increases difficulty in implementation on a process and limits the area of a light emitting region, so that high PPI cannot be achieved, 2, external voltage and current compensation, a peripheral circuit is required to be designed to monitor voltage or current of pixels, and a panel is required to be matched internally to pull out signals for monitoring, so that complexity of the circuit is increased, a narrow frame is achieved, 3, the existing optical compensation schemes are based on gray scale to adjust uneven light emission among pixels, while the existing optical compensation schemes are relative concepts for a driving chip (Driver IC) and an O L ED display device, the display devices rely on relationship among gray scale curves, the relationship among the gray scale curves set by gamma (gamma) is not favorable for adjusting the gray scale, the gray scale curves are not favorable, the gray scale correction parameters are not favorable for correcting the gray scale curves, the gray scale curves stored in advance, the gray scale correction parameters are not favorable, the gray scale correction parameters, such as no more than the gray scale correction methods, the gray scale correction parameters are not favorable for correcting the gray scale correction of the gray scale display devices, the gray scale circuits, the gray scale correction of the gray scale circuits.
[ summary of the invention ]
In view of the above, embodiments of the present invention provide a processing method and a processing apparatus for a display panel, so as to solve the above technical problems.
In one aspect, the present application discloses a display processing method of a display panel, which provides a plurality of display voltages to the display panel; recording the display voltage and the display brightness of each sub-pixel; generating a relation curve of the display voltage and the brightness of each sub-pixel according to the display voltages, and calculating the relation curve of the display voltage and the average brightness; mapping the relation curve of each sub-pixel to the relation curve of the display voltage and the average brightness through a corresponding coefficient; storing the corresponding coefficient of each sub-pixel and the relation curve of the display voltage and the average brightness into a driving chip; and sending the display data to a driving chip, calling the corresponding coefficient and the relation curve of the display voltage and the average brightness, processing and transmitting the processed display data to a display panel.
In an embodiment of the present application, the displaying gray scale range of the display panel is 0 to n gray scales, the generating a relationship curve between the display voltage and the brightness of each sub-pixel according to the plurality of display voltages, and the calculating the relationship curve between the display voltage and the average brightness specifically includes: generating a relation curve of display voltage and brightness of each sub-pixel according to at least k gray scale voltages, wherein k is the largest positive integer less than or equal to 0.3 x (n + 1); the 0-n/3 gray scale comprises a gray scale voltages; the n/3 to 2n/3 gray scales comprise b gray scale voltages; the 2 n/3-n gray scales comprise c gray scale voltages; a is the largest positive integer less than or equal to 0.45 k; b is the largest positive integer less than or equal to 0.3 k; c is k-a-b. Calculating a relation curve of the display voltage and the average brightness; the average brightness is an average value of brightness of each sub-pixel under a corresponding display voltage.
In an embodiment of the present application, the displaying gray scale range of the display panel is 0 to n gray scales, the generating a relationship curve between the display voltage and the brightness of each sub-pixel according to the plurality of display voltages, and the calculating the relationship curve between the display voltage and the average brightness specifically includes: generating a relation curve of the display voltage and the brightness of each sub-pixel according to at least n +1 gray scale voltages, and calculating the relation curve of the display voltage and the average brightness; the average brightness is an average value of brightness of each sub-pixel under a corresponding display voltage.
In one embodiment of the present application, each of the sub-pixels is numbered, and the relationship curve between the display voltage and the brightness of each of the sub-pixels is Ln＝fn(vi) Wherein n represents the number of the sub-pixel, i represents the corresponding gray scale voltage, and the relationship curve between the display voltage and the average brightness of each sub-pixel is Lmean＝fmean(vi) Wherein mean represents the average value of said sub-pixels, iRepresenting a gray level.
In one embodiment of the present application, the relationship curve is one of a polynomial, a logarithmic function, an exponential function, a trigonometric function, or a concentrated combination thereof.
In an embodiment of the present application, the mapping the relationship curve of each sub-pixel to the relationship curve of the display voltage and the average luminance through the corresponding coefficient specifically includes: by corresponding coefficient knCorresponding relation f between display voltage and brightness of the sub-pixeln(vi) Is mapped as f (k)n，fmean(vi))。
In one embodiment of the present application, fn(vi)＝an*vi+bn，fmean(vi)＝amean*vi+bmean(ii) a The mapping of the relationship curve of each sub-pixel to the relationship curve of the display voltage and the average luminance through the corresponding coefficient specifically includes: by corresponding coefficient anAnd bnWill f isn(vi) Is mapped as f (a)n，bn，fmean(vi))。
In one embodiment of the present application, by corresponding coefficient anAnd bnMapping the gray scale voltage v of the sub-pixel to (a)mean*v+bmean-bn)/an。
In an embodiment of the present application, the storing the relationship curve between the corresponding coefficient of each sub-pixel and the display voltage and the average luminance into the driving chip specifically includes: the corresponding coefficient knAnd the curve f of the display voltage versus the average brightnessmean(vi) And storing the data into the driving chip.
In an embodiment of the present application, the recording the display voltage and the display luminance of each sub-pixel specifically includes: and recording the display brightness corresponding to the sub-pixels by using optical acquisition equipment when each display voltage is provided.
In another aspect, the present application provides a display processing apparatus of a display panel, including: a gray scale providing unit: the gray scale providing unit is used for providing a plurality of display voltages to the display panel; a recording unit: the recording unit is used for recording the display voltage and the display brightness of each sub-pixel; a generation unit: the generating unit is used for generating a relation curve between the display voltage and the brightness of each sub-pixel according to the display voltages and calculating the relation curve between the display voltage and the average brightness; a mapping unit: mapping the relation curve of each sub-pixel to the relation curve of the display voltage and the average brightness through a corresponding coefficient; a storage unit: the storage unit is used for storing the corresponding coefficient of each sub-pixel and the relation curve of the display voltage and the average brightness to a driving chip; a drive unit: and the driving unit is used for sending display data into a driving chip, calling the corresponding coefficient and the relation curve of the display voltage and the average brightness, processing the relation curve and transmitting the processed relation curve to the display panel.
The relation between the display voltage and the average brightness is generated by recording the relation curve between the display voltage and the display brightness of each sub-pixel. And mapping the relation curve of each sub-pixel to the relation between the display officer and the average brightness through the corresponding coefficient. And finally, calling a relation curve of the coefficient, the display voltage and the average brightness. The processing method of the display panel directly relates the display voltage and the brightness. The mura of each gray scale can be eliminated, and the image display effect can be improved in both low-brightness and high-brightness modes. And the memory space is small, the IC resource is less, and the feasibility of the scheme is greatly improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a display panel processing method according to an embodiment of the present application;
FIG. 2 is a graph illustrating a relationship between display voltage and brightness according to an embodiment of the present application;
FIG. 3 is a schematic diagram of storing corresponding coefficients according to an embodiment of the present application;
FIG. 4 is a diagram illustrating a relationship between a preset display voltage and an actual display voltage according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a display panel processing apparatus of an embodiment of the present application;
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In addition, the coefficients stored in the existing optical compensation scheme are parameters to be corrected, because none of the correction parameters of different gray scales are different, a storage chip (flash IC) can store the correction parameters of 0 to 255 gray scales, so that the method usually stores specific correction parameters of the gray scales, and the rest of the gray scales are obtained by interpolation, and the coefficient obtained by the method is often not high in accuracy, and the final compensation coefficient effect has deviation.
The application provides a display processing method of a display panel, which can eliminate mura, has small stored data amount and is suitable for various display modes. The image display effect can be improved in both the high luminance and low luminance modes.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a display panel processing method according to an embodiment of the present application;
the display processing method of the display panel provided by the embodiment comprises the following steps:
s1 providing multiple display voltages to the display panel, wherein the display voltages refer to data voltages, O L ED display panel is usually current driven, driving current Ids k (PVDD-Vdata)2When the whole display panel displays white, each sub-pixel inputs the same gray scale voltage, theoretically, the brightness is equal, and uniform white is displayed.
S2: recording the display voltage and the display brightness of each sub-pixel; recording the display voltage and the display brightness of each sub-pixel specifically includes: and recording the display brightness corresponding to the sub-pixels by using optical acquisition equipment when each display voltage is provided. For example: and inputting display voltage to the display panel by using an external device, and simultaneously acquiring and storing the brightness of each sub-pixel by using the CCD camera. The display voltage is directly supplied to the display panel, and the display voltage and the display brightness of each sub-pixel are recorded. The display voltage is directly linked to the actual brightness. Rather than gray scale and brightness, thus avoiding the prior art dependence on gray scale, voltage. The relationship between the brightness and the other components causes inaccurate compensation when the brightness changes. For example: the maximum luminance is set at 25nit in the night mode, that is, the luminance of 255 gradations does not exceed 25nit in the 8-bit display panel. Whereas in the outdoor high brightness display mode the maximum brightness may require 500 nit. The compensation values for the high and low luminance modes are different in practice. In the prior art, inaccurate compensation occurs when compensation is performed according to gray scale. Correction parameters are needed if this situation is compensated for. However, each gray level needs to be corrected, and correction parameters are needed, and each gray level may need different correction parameters corresponding to different luminance patterns. The existing memory chip can not store so many correction parameters, and adopts a difference algorithm. But this also presents the problem of deviations after compensation. The present application directly relates display voltage to brightness, avoiding the relationship with gray scale, and thus avoiding the above problems.
S3: generating a relation curve of the display voltage and the brightness of each sub-pixel according to the display voltages, and calculating the relation curve of the display voltage and the average brightness;
s4: mapping the relation curve of each sub-pixel to the relation curve of the display voltage and the average brightness through a corresponding coefficient;
s5: storing the corresponding coefficient of each sub-pixel and the relation curve of the display voltage and the average brightness into a driving chip; the number of sub-pixels of the display panel is in the millions, and the memory chip cannot store the relation curve of each sub-pixel. For example: taking a display panel with 1920 × 1080 resolution as an example, the display panel includes 1920 × 1080 × 2 ═ 4147200 subpixels. Each relation curve occupies a large number of bytes, an existing storage chip cannot store four million relation curves, the calculation process for calling the relation curves is slower, and consumption of chip resources is larger. The method and the device generate a relation curve of the display line voltage and the average brightness, and map the relation curve of each sub-pixel to the relation curve of the display voltage and the average brightness through corresponding coefficients. Only the corresponding coefficients of the sub-pixels and the corresponding curves of the display voltage and the average brightness need to be stored, so that the space occupied by the storage chip is greatly reduced.
S6: and sending the display data to a driving chip, calling the corresponding coefficient and the relation curve of the display voltage and the average brightness, processing and transmitting the processed display data to a display panel. In this embodiment, only the relation curve between the corresponding coefficient of each sub-pixel and the display voltage and the average luminance is called, and compared with the relation curve between the display voltage and the luminance of each sub-pixel, the calling speed can be faster, and the macro-scale is reflected that the processing speed is wider and the display delay is lower.
Furthermore, the display panel displays the gray scales within the range of 0 to n, and the generated display voltage and brightness relation curve can include gray scale voltages of all gray scales and also can include gray scale voltages of part of gray scales. When all the gray scale voltages and the brightness are used to generate the relationship curve, it takes a long time to generate the curve, resulting in a decrease in efficiency. As in the previous example, 4147200 subpixels in the panel are required to generate a display voltage versus luminance curve. If each sub-pixel generates a relationship curve for 1ms, the total generation time is increased by 1.15h, which may significantly reduce efficiency. In order to improve the efficiency of generating the curve, generating a relationship curve between the display voltage and the brightness of each sub-pixel according to the plurality of display voltages, and calculating the relationship curve between the display voltage and the average brightness specifically includes:
generating a relation curve of display voltage and brightness of each sub-pixel according to at least k gray scale voltages, wherein k is the largest positive integer less than or equal to 0.3 x (n + 1); the 0-n/3 gray scale comprises a gray scale voltages; the n/3 to 2n/3 gray scales comprise b gray scale voltages; the 2 n/3-n gray scales comprise c gray scale voltages; a is the largest positive integer less than or equal to 0.45 k; b is the largest positive integer less than or equal to 0.3 k; c is k-a-b.
Calculating a relation curve of the display voltage and the average brightness; the average brightness is an average value of brightness of each sub-pixel under a corresponding display voltage. The gray scale voltage refers to a display voltage corresponding to the gray scale. For example, a gray scale voltage of 3.2v means that a display voltage corresponding to 255 gray scales is 3.2 v.
Since the luminance corresponding to the low gray scale voltage is relatively low, and the influence of the luminance fluctuation on the corresponding relationship is relatively large, the low gray scale needs to generate a relationship curve according to more low gray scale voltages and luminances. For example: the 10 gray level corresponds to 30nit, the 200 gray level corresponds to 300nit, the brightness deviation of the same 3nit is 10% of the fluctuation of the 10 gray level, and the 200 gray level is only 1%. Therefore, the display voltage and brightness relation curve can improve the accuracy of the obtained display voltage and brightness relation curve according to more data under low gray scale without increasing the total data.
For example: and generating a relation curve of the display voltage and the brightness of each sub-pixel according to the 10 gray scale voltages. Selecting 5 gray scale voltages as display voltages at 0-85 gray scales and recording the display brightness; selecting 3 gray scale voltages as display voltages at 86-170 gray scales and recording the display brightness; selecting 2 gray scale voltages from 171 to 255 gray scales as display gray scales and recording the display brightness. Thus, a total of 10 display voltages and corresponding display luminances were recorded. On the premise of not increasing the number of recording points, the precision of obtaining a relation curve between the display voltage and the brightness is greatly increased, and the precision of display processing is improved.
In another embodiment of the present application, the displaying gray scale range of the display panel is 0 to n gray scales, the generating a relationship curve between the display voltage and the luminance of each sub-pixel according to the plurality of display voltages, and the calculating the relationship curve between the display voltage and the average luminance specifically includes: generating a relation curve of the display voltage and the brightness of each sub-pixel according to at least n +1 gray scale voltages, and calculating the relation curve of the display voltage and the average brightness; the average brightness is an average value of brightness of each sub-pixel under a corresponding display voltage.
Different from the previous embodiment, since the present embodiment is directed to different customer requirements, the gray scale voltages according to different gray scales are selected to generate the relationship curve of the display voltage and the brightness. Unlike typical consumer product customers, cost and mass production efficiencies may be traded for display color accuracy for professional customers of images and film. Therefore, all the gray scale voltages of the 0-n gray scales can be used as display voltages, the corresponding display brightness under each display voltage is recorded, and the relation curve of the display voltage and the brightness of each sub-pixel is obtained, so that the obtained curve is more accurate, and the compensation of the display panel is more accurate.
In another embodiment of the present application,
numbering each sub-pixel of the display panel;
the relationship curve between the display voltage and the brightness of each sub-pixel is Ln＝fn(vi) Wherein n represents the number of the sub-pixel, and i represents the corresponding gray scale voltage;
the relationship curve between the display voltage of each sub-pixel and the average brightness is Lmean＝fmean(vi) Wherein mean represents an average value of each of the sub-pixels, and i represents a corresponding gray scale voltage; since the display voltages input to the sub-pixels are the same, the average luminance corresponding to each display voltage is the average value of the sub-pixels after the luminance is summed at the display voltage, and then the relationship curve between the display voltage and the average luminance can be obtained according to the average value and the display voltage.
The display panel at least comprises three sub-pixels with different colors, and the relation curve of the display voltage and the average brightness at least comprises three curves; the sub-pixels with different colors correspond to different display voltage-average brightness relation curves. The display panel generally needs to include at least R, G, B subpixels of three colors to realize a full-color display. Because the corresponding relationship between the luminance of the sub-pixels with different colors and the gray scale voltage is different, the luminance of the blue sub-pixel under the same display voltage is lower than the luminance of the red sub-pixel, and the gray scale voltage and the luminance step value between the gray scales are different, the relationship curve between the display voltage and the average luminance of the sub-pixels with different colors is set to be different, which is beneficial to improving the color accuracy of the sub-pixels with different colors.
After obtaining the relationship curve between the display voltage and the brightness of each sub-pixel and the relationship curve between the display voltage and the average brightness, the relationship curve of each sub-pixel needs to be mapped to the relationship curve between the display voltage and the average brightness through a corresponding coefficient. With continuing reference to FIGS. 3 and 4, FIG. 3 is a schematic diagram of one embodiment of the present application storing corresponding coefficients; FIG. 4 is a diagram illustrating a relationship between a preset display voltage and an actual display voltage according to an embodiment of the present application;
the mapping of the relationship curve of each sub-pixel to the relationship curve of the display voltage and the average luminance through the corresponding coefficient specifically includes:
by corresponding coefficient knCorresponding relation f between display voltage and brightness of the sub-pixeln(vi) Is mapped as f (k)n，fmean(vi) Wherein f) ismean(vi) Showing the display voltage versus average brightness. The mapping is defined as passing any gray scale voltage vi for any sub-pixel through a relation curve f between display voltage and average brightnessmean(vi) And corresponding coefficient knThe actual display voltage required for the sub-pixel to display to average brightness is derived.
Optionally, the relation curve is one of a polynomial, a logarithmic function, an exponential function, and a trigonometric function, or a centralized combination.
Taking a first-order polynomial as an example, the relationship curve of the display voltage and the brightness of the sub-pixel is fn(vi)＝an*vi+bn，fmean(vi)＝amean*vi+bmean；
The mapping of the relationship curve of each sub-pixel to the relationship curve of the display voltage and the average luminance through the corresponding coefficient specifically includes:
by corresponding coefficient anAnd bnWill f isn(vi) Is mapped as f (a)n，bn，fmean(vi))。
The mapping referred to herein means that the coefficient a can be mappednAnd bnAnd displaying the relationship curve f between the gray scale and the average brightnessmean(vi) And mapping the display voltage of the gray scale to be displayed into an actual display voltage.
Specifically, when the relation curve of the display voltage and the average brightness is fmean(vi)＝amean*vi+bmeanWhen passing through the corresponding coefficient anAnd bnMapping the display voltage v of the target gray scale of the sub-pixel to an actual display voltage (a)mean*v+bmean-bn)/an。
Referring to fig. 3 and 4, the corresponding coefficient k of each sub-pixel is shownghWhere g denotes a row and h denotes a column, the corresponding coefficient k of each sub-pixelghComprises agh，bghAnd the corresponding relation f of display voltage and average brightnessmean(vi) And storing the data in a memory chip. And, the display voltage v of the target gray scale is adjustedghMapped to the actual display voltage vgh'. Taking the above linear function as an example, vgh’＝(amean*vgh+bmean-bn)/an。
Further, storing the relationship between the corresponding coefficient of each sub-pixel and the display voltage and the average luminance in a driving chip specifically includes: the corresponding coefficient knAnd the curve f of the display voltage versus the average brightnessmean(vi) And storing the data into the driving chip.
In another embodiment of the present application, please refer to fig. 2, fig. 2 is a graph illustrating a relationship between a display voltage and a luminance according to an embodiment of the present application;
the display voltage of the sub-pixel is fitted to the average luminance as a quadratic function.
In this embodiment, gray scales 31, 63, 95, 128, 224, and 255 are selected, and display voltages of these gray scales are input to the display panel. Taking the red sub-pixel as an example,
first, each sub-pixel of the selected gray scale of the present embodiment is lit using the same Vdata, and the gray scale voltage matrix is denoted as V, V [ V _ R31V _ R63V _ R95V _ R128V _ R224V _ R255] ([ 5.22074.93234.64404.34663.48163.2022 ]
Recording the display voltage and the display brightness of each sub-pixel; the CCD is photographed to obtain the brightness corresponding to each sub-pixel, and the brightness set of different gray scales of each pixel is recorded, for example, 1 row and 1 column of R pixels:
L＝[L_R31(1,1) L_R63(1,1) L_R95(1,1) L_R128(1,1) L_R224(1,1) L_R255(1,1)]＝[4.3080 16.8144 43.4010 85.4760 273.0870 305.0100]
calculating the average brightness of all pixels of each gray scale:
Lmean＝[L_meanR31 L_meanR63 L_meanR95 L_meanR128 L_meanR224 L_meanR255]＝[5.9505 22.6143 55.3383 105.7620 400.7970 544.5198]
the following table is derived from the above data
Generating a relationship curve of display voltage and brightness of each sub-pixel according to the display voltages, calculating the relationship curve of the display voltage and average brightness, generating a relationship curve of (1,1) sub-pixel voltage and brightness using L and v, f (1,1) ═ 48.28 v 2-566 v +1637, generating a relationship curve of target voltage and brightness using L mean and vmean＝131.3*v^2-1370*v+3582。
Mapping the relation curve of each sub-pixel to the relation curve of the display voltage and the average brightness through the corresponding coefficient, (1,1) mapping the corresponding coefficients 48.28, -566 and 1637 of the sub-pixels to L mean, storing the corresponding coefficients of each sub-pixel and the relation curve of the display voltage and the average brightness to a driving chip, sending the display data to the driving chip, calling the corresponding coefficients and the relation curve of the display voltage and the average brightness, processing and transmitting the processed display data to a display panel.
Demura is intended to equalize the luminance unevenness of the panel sub-pixels under the same Vdata by compensation, and the present embodiment sets the target luminance to the average luminance LmeanWhen the input voltage of the (1,1) sub-pixel is v, and when the preset voltage of the preset gray scale is v11, in order to ensure that the brightness reaches the target brightness, the relation curve f of the corresponding coefficients 48.28, -566 and 1637 and the average brightness is neededmean131.3 x v 2-1370 x v +3582 yields the relationship: 48.28 v11 ' ^2-566 v11 ' +1637 ^ 131.3 v11^2-1370 v11+3582, and the IC calculates the relational expression to find the corresponding v11 ' and displays the actual voltage. This allows the color of each sub-pixel to be adjusted to the target brightness, resulting in a uniform display.
The application also discloses a display processing device of the display panel. Referring to fig. 5, fig. 5 is a schematic diagram of a display panel processing apparatus according to an embodiment of the present application;
the display processing apparatus includes:
the gradation providing unit 103: the gray scale providing unit is used for providing a plurality of display voltages to the display panel;
the recording unit 101: the recording unit is used for recording the display voltage and the display brightness of each sub-pixel;
the generation unit 1021: the generating unit is used for generating a relation curve between the display voltage and the brightness of each sub-pixel according to the display voltages and calculating the relation curve between the display voltage and the average brightness;
the mapping unit 1022: mapping the relation curve of each sub-pixel to the relation curve of the display voltage and the average brightness through a corresponding coefficient;
the storage unit 104: the storage unit is used for storing the corresponding coefficient of each sub-pixel and the relation curve of the display voltage and the average brightness to a driving chip;
the driving unit 105: and the driving unit is used for sending display data into a driving chip, calling the corresponding coefficient and the relation curve of the display voltage and the average brightness, processing the relation curve and transmitting the processed relation curve to the display panel.
Firstly, after the display voltage required to be provided to the display panel is selected by an operator, the gray scale providing unit 103 provides a plurality of display voltages to the display panel 1000; the recording unit 101 records the display voltage supplied to each sub-pixel and tests the luminance of each sub-pixel by the recording unit while supplying the display voltage. The relationship curve between the display voltage and the luminance of each sub-pixel is generated by the generation unit 1021 according to the recorded display voltage and luminance of each sub-pixel. The generating unit 1021 may be a computer, and obtains the corresponding relationship curve by software fitting. The generating unit also needs to calculate the average brightness corresponding to each display voltage, and then calculates to obtain a relationship curve between the display voltage and the average brightness. Each sub-pixel is then mapped to a display voltage versus average luminance curve by the mapping unit 1022 through a corresponding coefficient. And the correlation coefficient and the display voltage versus average luminance are transferred to the storage unit 104, and the storage unit 104 stores only the correlation coefficient and the display voltage versus average luminance for each sub-pixel. Finally, in the process of displaying on the display panel 1000, the driving unit 105 calls the corresponding coefficients of the sub-pixels and the relationship curve between the display voltage and the average brightness, and the processed coefficients are transmitted to the display panel 1000.
The display processing device of the display panel has the advantages that the data size required to be processed is small, the stored data size is small, and the compensation is accurate.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (11)
1. A display processing method of a display panel is characterized in that,
providing a plurality of display voltages to the display panel;
recording the display voltage and the display brightness of each sub-pixel;
generating a relation curve of the display voltage and the brightness of each sub-pixel according to the display voltages, and calculating the relation curve of the display voltage and the average brightness;
mapping the relation curve of each sub-pixel to the relation curve of the display voltage and the average brightness through a corresponding coefficient;
storing the corresponding coefficient of each sub-pixel and the relation curve of the display voltage and the average brightness into a driving chip;
and sending the display data to a driving chip, calling the corresponding coefficient and the relation curve of the display voltage and the average brightness, processing and transmitting the processed display data to a display panel.
2. The display processing method of the display panel according to claim 1,
the display panel displays gray scales ranging from 0 to n,
generating a relationship curve between the display voltage and the brightness of each sub-pixel according to the plurality of display voltages, and calculating the relationship curve between the display voltage and the average brightness specifically comprises:
generating a relation curve of display voltage and brightness of each sub-pixel according to at least k gray scale voltages, wherein k is the largest positive integer less than or equal to 0.3 x (n + 1); the 0-n/3 gray scale comprises a gray scale voltages; the n/3 to 2n/3 gray scales comprise b gray scale voltages; the 2 n/3-n gray scales comprise c gray scale voltages; a is the largest positive integer less than or equal to 0.45 k; b is the largest positive integer less than or equal to 0.3 k; c is k-a-b;
calculating a relation curve of the display voltage and the average brightness; the average brightness is an average value of brightness of each sub-pixel under a corresponding display voltage.
3. The display processing method of the display panel according to claim 1,
the display panel displays gray scales ranging from 0 to n,
generating a relationship curve between the display voltage and the brightness of each sub-pixel according to the plurality of display voltages, and calculating the relationship curve between the display voltage and the average brightness specifically comprises:
generating a relation curve between the display voltage and the brightness of each sub-pixel according to at least n +1 gray scale voltages,
calculating a relation curve of the display voltage and the average brightness; the average brightness is an average value of brightness of each sub-pixel under a corresponding display voltage.
4. The display processing method of the display panel according to claim 2 or 3,
numbering each of the sub-pixels;
the relationship curve between the display voltage and the brightness of each sub-pixel is Ln＝fn(vi) Wherein n represents the number of the sub-pixel, and i represents the corresponding gray scale;
the relationship between the display voltage and the average luminance of each of the sub-pixels is Lmean＝fmean(vi) Wherein mean represents an average value of said each of said sub-pixels; the display panel at least comprises three sub-pixels with different colors, and the relation curve of the display voltage and the average brightness at least comprises three curves; the sub-pixels with different colors correspond to different display voltage-average brightness relation curves.
5. The display processing method of the display panel according to claim 4,
the relation curve is one or a centralized combination of a polynomial, a logarithmic function, an exponential function and a trigonometric function.
6. The display processing method of a display panel according to claim 4,
the mapping of the relationship curve of each sub-pixel to the relationship curve of the display voltage and the average luminance through the corresponding coefficient specifically includes:
by corresponding coefficient knCorresponding relation f between display voltage and brightness of the sub-pixeln(vi) Is mapped as f (k)n，fmean(vi))。
7. The display processing method of the display panel according to claim 6,
fn(vi)＝an*vi+bn，fmean(vi)＝amean*vi+bmean；
the mapping of the relationship curve of each sub-pixel to the relationship curve of the display voltage and the average luminance through the corresponding coefficient specifically includes:
by corresponding coefficient anAnd bnWill f isn(vi) Is mapped as f (a)n，bn，fmean(vi))。
8. The display processing method of the display panel according to claim 7,
by corresponding coefficient anAnd bnMapping the gray scale voltage v of the sub-pixel to (a)mean*v+bmean-bn)/an。
9. The display processing method of the display panel according to claim 6,
the storing the relationship curve between the corresponding coefficient of each sub-pixel and the display voltage and the average brightness to the driving chip specifically includes:
the corresponding coefficient knAnd the curve f of the display voltage versus the average brightnessmean(vi) And storing the data into the driving chip.
10. The display processing method of the display panel according to claim 1,
the recording of the display voltage and the display brightness of each sub-pixel specifically includes: and recording the display brightness corresponding to the sub-pixels by using optical acquisition equipment when each display voltage is provided.
11. A display processing apparatus of a display panel, comprising:
a gray scale providing unit: the gray scale providing unit is used for providing a plurality of display voltages to the display panel;
a recording unit: the recording unit is used for recording the display voltage and the display brightness of each sub-pixel;
a generation unit: the generating unit is used for generating a relation curve between the display voltage and the brightness of each sub-pixel according to the display voltages and calculating the relation curve between the display voltage and the average brightness;
a mapping unit: mapping the relation curve of each sub-pixel to the relation curve of the display voltage and the average brightness through a corresponding coefficient;
a storage unit: the storage unit is used for storing the corresponding coefficient of each sub-pixel and the relation curve of the display voltage and the average brightness to a driving chip;
a drive unit: and the driving unit is used for sending display data into a driving chip, calling the corresponding coefficient and the relation curve of the display voltage and the average brightness, processing the relation curve and transmitting the processed relation curve to the display panel.
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| CN110619836B (en) * | 2019-10-31 | 2022-08-05 | Oppo广东移动通信有限公司 | Display screen processing method and device, storage medium and electronic equipment |
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