CN115547232A - Brightness compensation method and brightness compensation device of display panel - Google Patents

Brightness compensation method and brightness compensation device of display panel Download PDF

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Publication number
CN115547232A
CN115547232A CN202110738488.8A CN202110738488A CN115547232A CN 115547232 A CN115547232 A CN 115547232A CN 202110738488 A CN202110738488 A CN 202110738488A CN 115547232 A CN115547232 A CN 115547232A
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brightness
light
under
target
gray scale
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Inventor
张东豪
钱先锐
张金刚
黄飞
黄亚东
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Chengdu Vistar Optoelectronics Co Ltd
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Chengdu Vistar Optoelectronics Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G—PHYSICS
    • 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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention discloses a brightness compensation method and a brightness compensation device of a display panel, wherein the brightness compensation method of the display panel comprises the following steps: acquiring the brightness of each light-emitting device in the display panel under at least two preset gray scales; determining target brightness of the light-emitting devices under different preset gray scales according to the brightness of each light-emitting device; and compensating the light-emitting brightness of the display panel according to the target brightness under different preset gray scales. The embodiment of the invention obtains the target brightness under different preset gray scales based on the brightness of each light-emitting device under at least two preset gray scales, adjusts the brightness of each light-emitting device under the current gray scale to the target brightness corresponding to the current gray scale, and improves the display uniformity of the display panel.

Description

Brightness compensation method and brightness compensation device for display panel
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a brightness compensation method and a brightness compensation device of a display panel.
Background
With the rapid development of electronic devices, users have higher and higher requirements for displaying images of electronic devices, so that the image display of electronic devices is receiving more and more attention in the industry.
At present, display panels of electronic devices, especially Micro-LED (Micro light emitting diode) display panels, are rapidly emerging due to their high contrast and long life cycle. However, there are many problems to be solved before the actual mass production, and one of them is the Mura (brightness non-uniformity) problem.
Disclosure of Invention
The invention provides a brightness compensation method and a brightness compensation device of a display panel, which are used for improving the Mura phenomenon of the display panel, improving the uniformity of the brightness of the whole display panel and improving the display effect of the display panel.
In a first aspect, an embodiment of the present invention provides a method for compensating brightness of a display panel, including:
acquiring the brightness of each light-emitting device in the display panel under at least two preset gray scales;
determining target brightness of the light-emitting devices under different preset gray scales according to the brightness of each light-emitting device;
and compensating the light-emitting brightness of the display panel according to the target brightness under the different preset gray scales.
Optionally, the determining the target brightness of the light emitting device under the different preset gray scales according to the brightness of each light emitting device includes:
calculating the brightness average value under a preset gray scale according to the brightness of each light-emitting device under the preset gray scale, and taking the brightness average value as the target brightness under the preset gray scale;
and calculating the brightness average value under the other preset gray scale according to the brightness of each light-emitting device under the other preset gray scale, and taking the brightness average value as the target brightness under the other preset gray scale until the target brightness under at least two preset gray scales is determined.
Optionally, the compensating the luminance of the display panel according to the target luminance under the different preset grayscales includes:
compensating the brightness of each light-emitting device according to the target brightness under the preset gray scale;
and compensating the light-emitting brightness of all gray scales of the display panel according to the target brightness of at least two preset gray scales.
Optionally, the compensating the luminance of each light emitting device according to the target luminance under a preset gray scale includes:
and adjusting the brightness of each light-emitting device under the preset gray scale to the target brightness under the preset gray scale.
Optionally, a relation between the luminance of the preset gray scale and the target luminance corresponding to the preset gray scale is as follows:
Y 1 ＝A 1 X 1 +B 1 wherein Y is 1 Target brightness of a predetermined gray scale, X 1 A brightness corresponding to a predetermined gray scale 1 And B 1 Is a first compensation factor.
Optionally, the compensating the luminance of all gray scales of the display panel according to the target luminance under at least two preset gray scales includes:
acquiring target brightness under all gray scales according to the target brightness under at least two preset gray scales;
and compensating the light-emitting brightness of all the gray scales of the display panel according to the target brightness of all the gray scales.
Optionally, the obtaining the target brightness of all gray scales according to the target brightness of at least two preset gray scales includes:
and fitting the target brightness of all gray scales according to the target brightness of at least two preset gray scales.
Optionally, when the preset gray scales are two, the relationship between the target brightness of any gray scale and the corresponding gray scale is: y is 2 ＝A 2 X 2 +B 2 Wherein, Y 2 Target luminance at any gray level, X 2 To correspond to gray scale, A 2 And B 2 Is a second compensation coefficient;
when the preset isWhen the gray scales are three, the relation between the target brightness of any gray scale and the corresponding gray scale is as follows: y is 3 ＝A 3 X 3 2 +B 3 X 3 +C 3 Wherein, Y 3 Target luminance, X, of any gray level 3 To correspond to gray scale, A 3 、B 3 And C 3 Is a second compensation factor.
In a second aspect, an embodiment of the present invention further provides a brightness compensation apparatus for a display panel, where the brightness compensation apparatus includes:
the device comprises a light-emitting brightness acquisition module, a light-emitting brightness acquisition module and a light-emitting brightness acquisition module, wherein the light-emitting brightness acquisition module is used for acquiring the light-emitting brightness of each light-emitting device in the display panel under at least two preset gray scales;
the target brightness determining module is used for determining the target brightness of each light-emitting device under different preset gray scales according to the brightness of each light-emitting device;
and the compensation module is used for compensating the light-emitting brightness of the display panel according to the target brightness under the different preset gray scales.
Optionally, the target brightness determining module includes:
the average value obtaining unit is used for calculating the brightness average value under a preset gray scale according to the brightness of each light-emitting device under the preset gray scale and taking the brightness average value as the target brightness under the preset gray scale;
the average value obtaining unit is further configured to calculate a luminance average value under another preset gray scale according to the luminance of each light emitting device under another preset gray scale, and use the luminance average value as the target luminance under another preset gray scale until the target luminance under at least two preset gray scales is determined.
The embodiment of the invention provides a brightness compensation method and a brightness compensation device of a display panel, wherein the brightness compensation method of the display panel comprises the following steps: acquiring the brightness of each light-emitting device in the display panel under at least two preset gray scales; determining target brightness of the light-emitting devices under different preset gray scales according to the brightness of each light-emitting device; and compensating the light-emitting brightness of the display panel according to the target brightness under different preset gray scales. The embodiment of the invention obtains the target brightness under different preset gray scales based on the brightness of each luminescent device under at least two preset gray scales, and adjusts the brightness of each luminescent device under the current gray scale to the target brightness corresponding to the current gray scale, thereby not only improving the uniformity of the brightness in a certain display area, but also improving the uniformity of the brightness among different areas, further improving the uniformity of the brightness of the whole display panel, improving the Mura phenomenon of the display panel and improving the display effect of the display panel.
Drawings
FIG. 1 is a flowchart illustrating a method for compensating brightness of a display panel according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a brightness compensation method for a display panel according to another embodiment of the present invention;
FIG. 3 is a flowchart illustrating a brightness compensation method for a display panel according to another embodiment of the present invention;
FIG. 4 is a flowchart illustrating a brightness compensation method for a display panel according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a luminance compensation apparatus of a display panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As described in the background art, the display panel, especially the Micro-LED display panel, has a problem of non-uniform display during displaying, and the inventor researches and discovers that the above problems occur because of the poor individuality of the LED chiplets, the bonding difference between the LEDs and the backplane, the batch transfer difference, the pixel circuit difference and the aging difference of the backplane, and the like, which cause the display panel to have a problem of non-uniform brightness, thereby reducing the display effect of the display panel.
For the above reasons, an embodiment of the present invention provides a method for compensating luminance of a display panel, and fig. 1 is a flowchart of the method for compensating luminance of a display panel according to the embodiment of the present invention, where the embodiment is applicable to a case of compensating luminance of a display panel, and the method may be executed by a luminance compensation apparatus, and specifically includes the following steps:
s01: and acquiring the brightness of each light-emitting device in the display panel under at least two preset gray scales.
Specifically, the preset gray scales are preset display gray scales, the number of the preset gray scales is greater than or equal to two, and exemplarily, the number of the preset gray scales may be two. Optionally, one of the preset gray levels may be a maximum gray level of the display. When the display gray scale of the display panel is 0-255 gray scale, 255 gray scale is the maximum gray scale displayed. Under the maximum gray scale, the brightness of the light-emitting device is maximum, the brightness value of the light-emitting device is easy to obtain, and the error of the obtained brightness value can be reduced.
The display panel comprises a plurality of pixel structures, each pixel structure can comprise at least one sub-pixel structure, and each sub-pixel structure corresponds to a light-emitting device. The light emitting devices in the display panel may include various kinds, for example, red, blue, and green light emitting devices, thereby realizing a display of various colors. For example, when the display panel is a Micro-LED display panel, and when the Micro-LED display panel is manufactured, a substrate on which LEDs are formed is different from a substrate on which a driving circuit is formed, so that after the LEDs are manufactured, a plurality of LEDs need to be transferred onto the substrate on which the driving circuit is formed through a transfer device, and the number of transfer stations in the transfer device, which can be used for transferring the LEDs, is limited, so that only a certain number of LEDs can be transferred each time, all the LEDs need to be transferred onto the substrate on which the driving circuit is formed through multiple transfer operations, the transfer operations of different batches may cause differences between the transferred LEDs and the transferred LEDs of different batches, and the batch transfer differences are expressed as brightness differences between fixed areas, that is, brightness differences between different areas may exist in the Micro-LED display panel due to the transfer differences each time.
The luminance of each light emitting device in the display panel at the preset gray scale refers to the luminance of the light emitting device when the light emitting device is lit at the preset gray scale. In the driving chip of the display panel, the gray scales correspond to the light-emitting brightness in a one-to-one correspondence manner, the light-emitting brightness corresponds to the data voltage in a one-to-one correspondence manner, and the light-emitting brightness of the light-emitting device in the display panel under the preset gray scale, namely the light-emitting brightness of the light-emitting device when the data voltage corresponding to the preset gray scale is provided for the light-emitting device in the display panel, is preset.
When the light emitting brightness under different preset gray scales is obtained, the current display gray scale of the display panel can be set as a preset gray scale, the light emitting brightness of each light emitting device under one preset gray scale is obtained, after the brightness of each light emitting device under the current gray scale is obtained, the display panel is lightened under another preset gray scale, the light emitting brightness of each light emitting device under another preset gray scale is obtained, and the like is carried out until the light emitting brightness of the light emitting devices under all the preset gray scales is obtained.
The light emitting brightness of the light emitting device in this embodiment may be acquired by an optical device, such as a ccd camera.
S02: and determining the target brightness of the light-emitting devices under different preset gray scales according to the brightness of each light-emitting device.
Specifically, in the present embodiment, when determining the target luminance according to the emission luminance at a gray level, the emission luminance has a mapping relationship with the target luminance, and according to the mapping relationship, the target luminance can be determined by the emission luminance. For example, the mapping relationship between the target luminance and the light emission luminance may be such that the target luminance is an average value of the light emission luminances. It should be noted that this is only an example, in other embodiments, the light-emitting luminance and the target luminance may have other mapping relationships, and this embodiment is not limited in detail here.
It should be noted that a predetermined gray level corresponds to a target brightness. When there are two preset gray levels in this embodiment, two target luminances can be obtained, and so on.
S03: and compensating the light-emitting brightness of the display panel according to the target brightness under different preset gray scales.
Specifically, under a preset gray scale, the brightness of the light emitting device is adjusted to the target brightness corresponding to the gray scale, under another preset gray scale, the brightness of the light emitting device is adjusted to the target brightness corresponding to the other preset gray scale, the uniformity of the brightness of the light emitting in the same display area is improved, the uniformity of the brightness of the light emitting between different areas is improved, the non-uniformity of the brightness of the light emitting between different areas caused by batch transfer difference is improved, the uniformity of the brightness of the light emitting of the whole display panel is improved, the Mura phenomenon of the display panel is improved, and the display effect of the display panel is improved.
The embodiment provides a brightness compensation method of a display panel, which comprises the following steps: acquiring the brightness of each light-emitting device in the display panel under at least two preset gray scales; determining target brightness of the light-emitting device under different preset gray scales according to the brightness; and compensating the light-emitting brightness of the display panel according to the target brightness under different preset gray scales. The embodiment obtains the target brightness under different preset gray scales based on the brightness of each light-emitting device under at least two preset gray scales, and adjusts the brightness of each light-emitting device under the current gray scale to the target brightness corresponding to the current gray scale, so that the brightness uniformity of the light-emitting device in a certain display area can be improved, the brightness uniformity among different areas can be improved, the brightness uniformity of the whole display panel is improved, the Mura phenomenon of the display panel is improved, and the display effect of the display panel is improved.
Fig. 2 is a flowchart of another brightness compensation method for a display panel according to an embodiment of the present invention, and referring to fig. 2, optionally, the brightness compensation method includes:
s10: and acquiring the brightness of each light-emitting device in the display panel under at least two preset gray scales.
Specifically, step S01 of the above example can be referred to for implementation of step S10.
S21: and calculating the brightness average value under the preset gray scale according to the brightness of each light-emitting device under the preset gray scale, and taking the brightness average value as the target brightness under the preset gray scale.
Specifically, the display gray scale of the display panel is set as a first preset gray scale, the display panel is lightened under the first preset gray scale, the luminance of each light-emitting device at the moment is obtained, the luminance average value is obtained according to the luminance of each light-emitting device, and the average value is used as the target luminance corresponding to the first preset gray scale.
S22: and calculating the brightness average value under the other preset gray scale according to the brightness of each light-emitting device under the other preset gray scale, and taking the brightness average value as the target brightness under the other preset gray scale until the target brightness under at least two preset gray scales is determined.
Specifically, after the target brightness corresponding to the first preset gray scale is obtained, the display panel is lightened under the second preset gray scale to obtain the brightness of each light-emitting device under the second gray scale, the brightness average value is obtained according to the brightness of each light-emitting device, and the average value is used as the target brightness corresponding to the second preset gray scale. And when the preset gray scales comprise a plurality of preset gray scales, repeating the step S22, continuously setting the display gray scale of the display panel to be another preset gray scale, acquiring the brightness of each light-emitting device under the other preset gray scale, calculating the average value of the brightness according to the brightness of each light-emitting device, and determining the target brightness corresponding to the other preset gray scale until the target brightness of all the preset gray scales is determined.
S30: and compensating the light-emitting brightness of the display panel according to the target brightness under different preset gray scales.
Specifically, step S03 of the above embodiment can be referred to in the implementation of step S30.
Fig. 3 is a flowchart of another brightness compensation method for a display panel according to an embodiment of the present invention, and referring to fig. 3, optionally, the brightness compensation method for a display panel includes:
s100: and acquiring the brightness of each light-emitting device in the display panel under at least two preset gray scales.
Specifically, step S01 of the above embodiment can be referred to in the implementation of step S100.
S210: and calculating the brightness average value under the preset gray scale according to the brightness of each light-emitting device under the preset gray scale, and taking the brightness average value as the target brightness under the preset gray scale.
Specifically, step S21 of the above embodiment can be referred to for implementation of step S210.
S220: and calculating the brightness average value under another preset gray scale according to the brightness of each light-emitting device under another preset gray scale, and taking the brightness average value as the target brightness under another preset gray scale until the target brightness under at least two preset gray scales is determined.
Specifically, step S22 of the above embodiment can be referred to for the implementation of step S220.
S310: and compensating the brightness of each light-emitting device according to the target brightness under a preset gray scale.
Optionally, the brightness of each light emitting device at a preset gray scale is adjusted to the target brightness at the preset gray scale.
When the brightness of each light-emitting device is adjusted to the target brightness under a preset gray scale, the brightness of each light-emitting device can be adjusted by adjusting the data voltage of each light-emitting device, so that the brightness of each light-emitting device is adjusted to the target brightness. Under a preset gray scale, the brightness of each light-emitting device is adjusted to the target brightness, so that the brightness compensation of a single light-emitting device is realized, the problem of uneven display brightness of the display panel caused by individual difference of the light-emitting devices and bonding difference between the light-emitting devices and the back plate is solved, and the display uniformity of the display panel is ensured.
Optionally, the relationship between the luminance of the preset gray scale and the target luminance corresponding to the preset gray scale is as follows:
Y 1 ＝A 1 X 1 +B 1 wherein Y is 1 Target brightness, X, for a predetermined gray level 1 A brightness corresponding to a predetermined gray scale 1 And B 1 Is a first compensation factor.
For example, a preset gray scale may be 255 gray scales, the display panel is turned on at 255 gray scales to obtain the luminance of each light emitting device, the average value of the luminances of all the light emitting devices is calculated, and the average value is used as the luminance of all the light emitting devicesThe target brightness is 255 grayscales. Illustratively, the target luminance is 120, and at 255 grayscales, the luminance of the first light emitting device is 118, and then the relation is Y 1 ＝X 1 +2, the luminance of the second light emitting device is 119, and then the relation is Y 1 ＝X 1 +1, i.e., the relationship between the emission luminance and the target luminance, is: y is 1 ＝X 1 +B 1 When there are M light emitting devices, (M is the number of light emitting devices), M B can be obtained 1 And as the first compensation coefficient, it is worth noting that the first compensation coefficient is a set of coefficients.
Or, when the target brightness is 120 at 255 gray levels, the brightness of the first light emitting device is 118, and the relation is Y 1 ＝1.017X 1 When the luminance of the second light emitting device is 119, the relation is Y 1 ＝1.008X 1 Namely, the relationship between the light-emitting brightness and the target brightness is: y is 1 ＝A 1 X 1 When there are M light emitting devices, M A can be obtained 1 And as a first compensation factor.
And optionally, the storage module is a register and is used for performing brightness compensation on each light-emitting device according to the stored first compensation coefficient when the display panel is subsequently displayed, so that the brightness compensation of a single light-emitting device is realized, the problem of uneven brightness caused by the self difference of the light-emitting device and the bonding difference between the light-emitting device and the back plate is solved, and the uniformity of the display brightness when the display panel displays is ensured.
S320: and compensating the light-emitting brightness of all gray scales of the display panel according to the target brightness under at least two preset gray scales.
And obtaining target brightness under all gray scales according to the target brightness under at least two preset gray scales, and then adjusting the brightness of each light-emitting device to the target brightness corresponding to the gray scale under each gray scale to perform brightness compensation under all gray scales. The brightness compensation under all gray scales can improve the uniformity of the brightness of the light in a certain display area and the uniformity of the brightness of the light in different areas, thereby improving the uniformity of the brightness of the whole display panel, improving the Mura phenomenon of the display panel and improving the display effect of the display panel.
Fig. 4 is a flowchart of another brightness compensation method for a display panel according to an embodiment of the present invention, and referring to fig. 4, optionally, the brightness compensation method for the display panel includes:
s101: and acquiring the brightness of each light-emitting device in the display panel under at least two preset gray scales.
Specifically, step S01 of the above example can be referred to for implementation of step S101.
S211: and calculating the brightness average value under the preset gray scale according to the brightness of each light-emitting device under the preset gray scale, and taking the brightness average value as the target brightness under the preset gray scale.
Specifically, step S21 of the above example can be referred to for implementation of step S211.
S221: and calculating the brightness average value under the other preset gray scale according to the brightness of each light-emitting device under the other preset gray scale, and taking the brightness average value as the target brightness under the other preset gray scale until the target brightness under at least two preset gray scales is determined.
Specifically, step S22 of the above embodiment can be referred to for implementation of step S221.
S311: and compensating the brightness of each light-emitting device according to the target brightness under a preset gray scale.
Specifically, step S310 of the above embodiment can be referred to for implementation of step S311.
S321: and acquiring the target brightness of all gray scales according to the target brightness of at least two preset gray scales.
Optionally, the target brightness under all gray scales is fitted according to the target brightness under at least two preset gray scales.
Optionally, when the preset gray scales are two, the relationship between the target brightness of any gray scale and the corresponding gray scale is: y is 2 ＝A 2 X 2 +B 2 Wherein Y is 2 Target luminance, X, of any gray level 2 To correspond to gray scale, A 2 And B 2 Is the second compensation factor.
For example, when the number of the preset gray scales is two, the gray scale value of the first preset gray scale is G1, the target brightness calculated under the first preset gray scale is L1, the gray scale value of the second preset gray scale is G2, and the target brightness calculated under the second preset gray scale is L2, then a relational expression Y representing the relationship between the gray scales and the target brightness can be fitted according to the two sets of data points (G1, L1) and (G2, L2) 2 ＝A 2 X 2 +B 2 And obtaining the target brightness corresponding to each gray scale according to the fitted relational expression.
Optionally, when the preset gray scales are three, the relationship between the target brightness of any gray scale and the corresponding gray scale is: y is 3 ＝A 3 X 3 2 +B 3 X 3 +C 3 Wherein Y is 3 Is the target brightness of any gray scale, X is the corresponding gray scale, A 3 、B 3 And C 3 Is the second compensation factor.
For example, when the number of the preset gray scales is three, the gray scale value of the first preset gray scale is G1, the target brightness calculated under the first preset gray scale is L1, the gray scale value of the second preset gray scale is G2, the target brightness calculated under the second preset gray scale is L2, the gray scale value of the third preset gray scale is G3, and the target brightness calculated under the third preset gray scale is L3, a relational expression Y representing a relation between the gray scales and the target brightness may be fitted according to the three groups of data points (G1, L1), (G2, L2), and (G3, L3) 3 ＝A 3 X 3 2 +B 3 X 3 +C 3 And obtaining the target brightness corresponding to each gray scale according to the fitted relational expression.
In other embodiments, when the number of the preset gray scales is four, the fitted relation is Y 4 ＝A 4 X 4 3 +B 4 X 4 2 +C 4 X 4 +D 4 When the number of the preset gray scales is N, the fitted relation is Y N ＝A N X N-1 +B N X N N-2 +C N X N N-3 +…D N X N +E N (ii) a Wherein A is 4 、B 4 、C 4 、D 4 Is the second compensation coefficient, or A N 、B N 、C N 、D N 、E N Is the second compensation factor.
S322: and compensating the light emitting brightness of all the gray scales of the display panel according to the target brightness of all the gray scales.
After the target brightness of each gray scale is obtained, the compensation coefficient of each light-emitting device can be obtained according to the light-emitting brightness of each light-emitting device and the target brightness corresponding to the gray scale under each gray scale, so that a group of compensation coefficients can be obtained, the compensation coefficients can be transmitted to a compensation module for storage, and when the display panel performs subsequent picture display, brightness compensation is performed according to the compensation coefficients, so that the uniformity of the light-emitting brightness of the light-emitting devices in a certain display area can be improved, the uniformity of the light-emitting brightness among different areas can also be improved, the uniformity of the light-emitting brightness of the whole display panel is improved, the Mura phenomenon of the display panel is improved, and the display effect of the display panel is improved.
Fig. 5 is a schematic structural diagram of a brightness compensation apparatus for a display panel according to an embodiment of the present invention, and referring to fig. 5, optionally, the brightness compensation apparatus for a display panel includes:
the light emitting brightness obtaining module 100 is configured to obtain light emitting brightness of each light emitting device in the display panel under at least two preset gray scales.
And the target brightness determining module 200 is configured to determine the target brightness of the light emitting devices at different preset gray scales according to the light emitting brightness of each light emitting device.
The compensation module 300 is configured to compensate the light emitting brightness of the display panel according to the target brightness under different preset gray scales.
The target brightness determining module of the embodiment obtains target brightness under different preset gray scales based on the brightness of each light emitting device under at least two preset gray scales, and the compensation module adjusts the brightness of each light emitting device under the current gray scale to the target brightness corresponding to the current gray scale, so that the brightness uniformity of the brightness of the light emitting devices in a certain display area can be improved, the brightness uniformity among different areas can be improved, the brightness uniformity of the whole display panel is improved, the Mura phenomenon of the display panel is improved, and the display effect of the display panel is improved.
Optionally, the target brightness determining module includes:
the average value obtaining unit is used for calculating the brightness average value under the preset gray scale according to the brightness of each light-emitting device under the preset gray scale and taking the brightness average value as the target brightness under the preset gray scale;
the average value obtaining unit is further configured to calculate a luminance average value under another preset gray scale according to the luminance of each light emitting device under another preset gray scale, and use the luminance average value as the target luminance under another preset gray scale until the target luminance under at least two preset gray scales is determined.
Optionally, the compensation module includes:
the first sub-compensation unit is used for compensating the light-emitting brightness of each light-emitting device according to the target brightness under a preset gray scale.
Specifically, the first sub-compensation unit is used for adjusting the brightness of each light-emitting device under a preset gray scale to a target brightness under the preset gray scale.
Optionally, the relationship between the luminance of the preset gray scale and the target luminance corresponding to the preset gray scale is as follows:
Y 1 ＝A 1 X 1 +B 1 wherein, Y 1 Target brightness, X, for a predetermined gray level 1 A brightness corresponding to a predetermined gray scale 1 And B 1 Is a first compensation factor.
And the second sub-compensation unit is used for compensating the light-emitting brightness of all the gray scales of the display panel according to the target brightness under at least two preset gray scales.
Optionally, the second sub-compensation unit includes:
and the fitting unit is used for acquiring the target brightness of all gray scales according to the target brightness of at least two preset gray scales.
Specifically, the fitting unit may be configured to fit the target brightness in all the gray scales according to the target brightness in at least two preset gray scales.
Optionally, when the preset gray scales are two, the relationship between the target brightness of any gray scale and the corresponding gray scale is: y is 2 ＝A 2 X 2 +B 2 Wherein Y is 2 Target luminance at any gray level, X 2 To correspond to gray scale, A 2 And B 2 Is the second compensation factor.
Optionally, when the number of the preset gray scales is three, the relationship between the target brightness of any gray scale and the corresponding gray scale is as follows: y is 3 ＝A 3 X 3 2 +B 3 X 3 +C 3 Wherein Y is 3 Target luminance at any gray level, X 3 To correspond to gray levels, A 3 、B 3 And C 3 Is the second compensation factor.
And the brightness compensation unit is used for compensating the light emitting brightness of all the gray scales of the display panel according to the target brightness of all the gray scales.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.

Claims (10)

1. A method for compensating brightness of a display panel, comprising:
acquiring the brightness of each light-emitting device in the display panel under at least two preset gray scales;
determining target brightness of the light-emitting devices under different preset gray scales according to the brightness of each light-emitting device;
and compensating the light-emitting brightness of the display panel according to the target brightness under the different preset gray scales.
2. The method for compensating brightness of a display panel according to claim 1, wherein said determining the target brightness of the light emitting devices at different preset gray scales according to the brightness of each light emitting device comprises:
calculating the brightness average value under a preset gray scale according to the brightness of each light-emitting device under the preset gray scale, and taking the brightness average value as the target brightness under the preset gray scale;
and calculating the brightness average value under another preset gray scale according to the brightness of each light-emitting device under another preset gray scale, and using the brightness average value as the target brightness under another preset gray scale until the target brightness under at least two preset gray scales is determined.
3. The method as claimed in claim 1 or 2, wherein the compensating the luminance of the display panel according to the target luminance at the different preset grayscales comprises:
compensating the brightness of each light-emitting device according to the target brightness under the preset gray scale;
and compensating the light-emitting brightness of all gray scales of the display panel according to the target brightness of at least two preset gray scales.
4. The method as claimed in claim 3, wherein the compensating the luminance of each of the light emitting devices according to the target luminance at a predetermined gray level comprises:
and adjusting the brightness of each light-emitting device under the preset gray scale to the target brightness under the preset gray scale.
5. The method as claimed in claim 4, wherein the relationship between the luminance of the predetermined gray scale and the target luminance corresponding to the predetermined gray scale is:
Y 1 ＝A 1 X 1 +B 1 wherein Y is 1 Target brightness, X, for a predetermined gray level 1 A brightness corresponding to a predetermined gray scale 1 And B 1 Is a first compensation factor.
6. The method as claimed in claim 3, wherein the compensating the luminance of all the grayscales of the display panel according to the target luminance at least two preset grayscales comprises:
obtaining target brightness under all gray scales according to the target brightness under at least two preset gray scales;
and compensating the light-emitting brightness of all the gray scales of the display panel according to the target brightness of all the gray scales.
7. The method of claim 6, wherein the obtaining the target brightness at all gray levels according to the target brightness at least two preset gray levels comprises:
and fitting the target brightness under all the gray scales according to the target brightness under at least two preset gray scales.
8. The method as claimed in claim 7, wherein when the predetermined number of gray levels is two, the relationship between the target brightness of any gray level and the corresponding gray level is: y is 2 ＝A 2 X 2 +B 2 Wherein Y is 2 Target luminance at any gray level, X 2 To correspond to gray levels, A 2 And B 2 Is a second compensation coefficient;
when the preset gray scales are three, the target brightness of any gray scaleThe relationship with the corresponding gray scale is: y is 3 ＝A 3 X 3 2 +B 3 X 3 +C 3 Wherein Y is 3 Target luminance, X, of any gray level 3 To correspond to gray scale, A 3 、B 3 And C 3 Is a second compensation factor.
9. A luminance compensation apparatus of a display panel, comprising:
the luminance obtaining module is used for obtaining the luminance of each light-emitting device in the display panel under at least two preset gray scales;
the target brightness determining module is used for determining the target brightness of each light-emitting device under different preset gray scales according to the brightness of each light-emitting device;
and the compensation module is used for compensating the light-emitting brightness of the display panel according to the target brightness under the different preset gray scales.
10. The luminance compensation apparatus of a display panel according to claim 9, wherein the target luminance determining module comprises:
the average value obtaining unit is used for calculating the brightness average value under a preset gray scale according to the brightness of each light-emitting device under the preset gray scale and taking the brightness average value as the target brightness under the preset gray scale;
the average value obtaining unit is further configured to calculate an average value of the brightness in another preset gray scale according to the brightness of each light emitting device in another preset gray scale, and use the average value as the target brightness in another preset gray scale until the target brightness in at least two preset gray scales is determined.
CN202110738488.8A 2021-06-30 2021-06-30 Brightness compensation method and brightness compensation device of display panel Pending CN115547232A (en)

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CN202110738488.8A CN115547232A (en) 2021-06-30 2021-06-30 Brightness compensation method and brightness compensation device of display panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110738488.8A CN115547232A (en) 2021-06-30 2021-06-30 Brightness compensation method and brightness compensation device of display panel

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Publication Number Publication Date
CN115547232A true CN115547232A (en) 2022-12-30

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