CN117351889A - Data voltage compensation method, data voltage compensation device and display device - Google Patents

Data voltage compensation method, data voltage compensation device and display device Download PDF

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Publication number
CN117351889A
CN117351889A CN202311413689.6A CN202311413689A CN117351889A CN 117351889 A CN117351889 A CN 117351889A CN 202311413689 A CN202311413689 A CN 202311413689A CN 117351889 A CN117351889 A CN 117351889A
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China
Prior art keywords
data signal
area
display panel
value
defect area
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CN202311413689.6A
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Chinese (zh)
Inventor
禹旺
周井雄
刘洋
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Xiamen Tianma Display Technology Co Ltd
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Xiamen Tianma Display Technology Co Ltd
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Priority to CN202311413689.6A priority Critical patent/CN117351889A/en
Publication of CN117351889A publication Critical patent/CN117351889A/en
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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
    • 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]
    • 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
    • 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
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping

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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 present disclosure relates to a data voltage compensation method, a data voltage compensation device and a display device, the method comprising: acquiring an image to be displayed and a defect area of the display panel; the defect area is positioned in the display area of the display panel; projecting the defect area to the image to be displayed to obtain a target gray value of the defect area; determining an initial data signal corresponding to the defect area when the display panel displays the image to be displayed; a data signal compensation value is determined based on the initial data signal and the target gray value. The method can reduce the probability of bad conditions such as bright lines or dark lines and the like of the OLED display panel when the image is displayed, and improve the display quality of the display panel.

Description

Data voltage compensation method, data voltage compensation device and display device
Technical Field
The disclosure relates to the technical field of display, and in particular relates to a data voltage compensation method, a data voltage compensation device and a display device.
Background
An OLED (Organic Light-Emitting Diode) display panel is one of the key points of competition in the current stage of screen display industry.
In the process of image display of the OLED display panel, due to the fact that the signal transmission line has a resistor, PVDD signals and source signals transmitted by the organic light emitting diodes are attenuated on the signal transmission line, and finally PVDD signals and source signals received by the organic light emitting diodes at different positions are different, so that coupling effects between the PVDD signals and the source signals at different positions are different, and bright lines or dark lines appear on the OLED display panel. The appearance of bright lines or dark lines may seriously affect the display quality of the display panel.
Disclosure of Invention
In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a data voltage compensation method, a data voltage compensation device and a display device.
In a first aspect, the present disclosure provides a data voltage compensation method applied to a display panel including a display area, the method comprising:
acquiring an image to be displayed and a defect area of the display panel; the defect area is positioned in the display area of the display panel;
projecting the defect area to the image to be displayed to obtain a target gray value of the defect area;
determining an initial data signal corresponding to the defect area when the display panel displays the image to be displayed;
a data signal compensation value is determined based on the initial data signal and the target gray value.
In a second aspect, the present disclosure also provides a data voltage compensation apparatus applied to a display panel including a display region, the apparatus comprising:
the acquisition module is used for acquiring an image to be displayed and a defect area of the display panel; the defect area is positioned in the display area of the display panel;
the target gray level determining module is used for projecting the defect area to the image to be displayed to obtain a target gray level value of the defect area;
the initial data signal determining module is used for determining initial data signals corresponding to the defect areas when the display panel displays the image to be displayed;
and the compensation value determining module is used for determining a data signal compensation value based on the initial data signal and the target gray value.
In a third aspect, the present disclosure also provides a display device including the data voltage compensation device as described above.
In a fourth aspect, the present disclosure also provides a display apparatus, including: a processor and a memory;
the processor is operable to perform the steps of any of the methods described above by invoking a program or instruction stored in the memory.
In a fifth aspect, the present disclosure also provides a computer-readable storage medium storing a program or instructions that cause a computer to perform the steps of any of the methods described above.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
the technical scheme provided by the embodiment of the disclosure obtains the image to be displayed and the defect area of the display panel through setting; the defect area is positioned in the display area of the display panel; projecting the defect area to an image to be displayed to obtain a target gray value of the defect area; determining an initial data signal corresponding to a defect area when the display panel displays an image to be displayed; based on the initial data signal and the target gray value, the data signal compensation value is determined, so that the data signal compensation value can be determined according to the image to be displayed, the data signal can be compensated, the probability of bad conditions such as bright lines or dark lines and the like of the OLED display panel during image display can be reduced, and the display quality of the display panel is improved. In addition, for the problem that the same defect exhibits different gray scale inaccuracy when different display images are displayed, since the technical solution provided by the embodiments of the present disclosure is to determine the data signal compensation value according to the image to be displayed, this means that the data signal compensation value determined for different images to be displayed is different. The data signal compensation value is adapted to the image to be displayed. If the data signal compensation value is a dynamically changing value, not a constant value, from the point of view that the image displayed on the display panel is continuously switched over time. The method can accurately compensate the data signal for each image to be displayed, and further achieve the purpose of better display quality no matter what image is displayed by the display panel.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a flow chart of a data voltage compensation method according to an embodiment of the present disclosure;
fig. 2-4 are schematic structural views of several display panels according to embodiments of the present disclosure;
FIG. 5 is a flowchart of another data voltage compensation method according to an embodiment of the present disclosure;
fig. 6-7 are schematic structural views of several other display panels according to embodiments of the present disclosure;
FIG. 8 is a block diagram illustrating a data voltage compensation apparatus according to an embodiment of the present disclosure;
fig. 9 is a schematic hardware structure of a display device according to an embodiment of the disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.
Fig. 1 is a flowchart of a data voltage compensation method according to an embodiment of the disclosure. Fig. 2-4 are schematic structural diagrams of several display panels according to embodiments of the present disclosure. The execution time of the data voltage compensation method is before the display panel displays the image to be displayed. The data voltage compensation method is applied to the OLED display panel. Referring to fig. 2 to 4, the display panel includes a display area 10, and the display area 10 includes a plurality of light emitting units 11 arranged in an array. The plurality of light emitting cells 11 arranged in an array constitute a plurality of light emitting cell rows and a plurality of light emitting cell columns. In this application, a display panel refers to a display panel having a defect. Defects are mainly represented by bright lines, dark lines or forming a specific pattern irrelevant to an image to be displayed on a display panel when the image is displayed.
Referring to fig. 1, the data voltage compensation method includes:
s110, acquiring an image to be displayed and a defect area of a display panel; the defect area is located in a display area of the display panel.
The image to be displayed is an image that needs to be displayed on the display panel but is not displayed. For example, if the current display panel is displaying the nth frame image of a certain video, the image to be displayed is an image after the nth frame image, such as the (n+1) th frame image.
The defective region of the display panel may be, for example, a region in which defects such as a gradation (or referred to as a gray scale) display failure may occur during the image display. In practice, defects may appear as bright lines, dark lines or form a specific pattern that is independent of the image to be displayed on the display panel when the image is displayed.
The number of defective areas included in a display panel is not limited. Illustratively, in fig. 2, the display panel includes 2 defect regions 20, and in fig. 3 and 4, the display panel includes 1 defect region 20.
In practice, the defective area may appear anywhere in the display area of the display panel. In addition, if the same display panel includes a plurality of defect regions, the shape and size of the different defect regions may be the same or different.
The display panel may have a defect for various reasons, which is not limited in the present application. In practice, the defect of the display panel may be caused by imperfect manufacturing process or errors, and may be caused by different attenuation conditions of the PVDD signal and/or the source signal at different positions, so that the coupling effect between the PVDD signal and the source signal at different positions is different.
In practice, there are various methods for obtaining the defective area of the display panel, which are not limited in this application. Exemplary, a method of acquiring a defective area of a display panel includes: and reading the defect record in the defect set to obtain a defect area of the display panel.
The defect set may be a set of defect records obtained by testing the display panel in advance. Optionally, the defect set comprises at least one defect record, which may be, for example, information describing a specific location of the defect area in the display panel. Illustratively, the defect record includes a correspondence of the defect region to at least one of a row of light emitting cells, a column of light emitting cells, and a light emitting cell in the display panel. Illustratively, a defect entry indicates that a defective area corresponds to the 23-25 row of light-emitting cells of the display panel, meaning that the defective bit area intersects the area occupied by the 23-25 row of light-emitting cells of the display panel. In other words, at least part of the light emitting cells in the 23 th to 25 th light emitting cell rows are located in the defective region.
Specifically, after the display panel is manufactured, the display panel is controlled to display different test images. In the process of displaying different test images on the display panel, detecting a display area of the display panel by using a Charge-coupled Device (CCD) sensor; obtaining a defect record based on the detection result; the defect record is added to the defect set. The reason for this is that in practice, when different display images are displayed, the same defect may exhibit different degrees of gray scale inaccuracy. For example, the light emitting cells in some defective areas may be more severely defective in gray scale display inaccuracy during the black-to-white switching process or the white-to-black switching process, and may appear as a distinct bright line or dark line. However, in the switching process of other colors, the condition of inaccurate gray scale display is light, and no obvious bright line or dark line is displayed.
S120, projecting the defect area to the image to be displayed to obtain a target gray value of the defect area.
The OLED display panel includes a plurality of light emitting cells arranged in an array. When an image to be displayed is displayed, each light emitting unit corresponds to one pixel in the image to be displayed, and the light emitting unit luminance can be controlled by controlling the current. The higher the gray value of the pixel, the higher the luminance of the light emitting unit. The aim of displaying the image to be displayed is finally achieved by controlling the brightness of each light-emitting unit respectively.
Since the display panel does not display the image to be displayed for the whole period of time in which the present method is performed, "projecting the defective area to the image to be displayed" is essentially determining the pixels corresponding to the defective area in the image to be displayed.
There are various specific implementation methods for "projecting the defective area onto the image to be displayed", which are not limited in this application. Exemplary, the specific implementation method of "projecting the defect area to the image to be displayed" includes: and determining the pixels corresponding to the defect area in the image to be displayed according to the positions of the defect area in the display area and the corresponding relation between the light emitting units and the pixels in the image to be displayed. Optionally, determining a light emitting unit located in the defect area according to the position of the defect area in the display area; determining a target pixel in an image to be displayed; the target pixel is a pixel corresponding to the light emitting unit located in the defective region; the target pixel is determined as a pixel corresponding to the defective region.
The target gray value may be, for example, a gray value to be displayed in order to display the image to be displayed with a better effect.
In some cases, the defective area corresponds to a plurality of target pixels, and thus the gray value of each target pixel in the defective area is taken as the target gray value of the defective area. I.e. the target gray values of the defect area are multiple.
It should be noted that, for the defective region, the target gray value is an ideal value, because in the OLED display panel, the data voltage (also referred to as a data signal in this application) functions to control the brightness of each light emitting unit. In the case where the data voltage compensation is not performed, if the data voltage for rendering the target gray value is inputted to the light emitting unit in the defective area, the actual gray value of the defective area is not equal to the target gray value due to the presence of the defect.
S130, determining initial data signals corresponding to the defect areas when the display panel displays the image to be displayed.
The initial data signal may be, for example, a data signal parsed from the image to be displayed, which should be applied to the light emitting unit regardless of the presence of a defect of the display panel.
In some cases, the defective area includes a plurality of light emitting units, and thus the initial data signal of each light emitting unit in the defective area is taken as the initial data signal corresponding to the defective area. I.e., the initial data signal corresponding to the defective area is plural.
If the display panel has no defect, the gray scale presented by the light emitting unit is a target gray scale value under the action of the initial data signal. However, since the display panel has a defect, the gray level represented by the light emitting unit in the defective area is not a target gray level value but an actual gray level value under the effect of the initial data signal.
And S140, determining a data signal compensation value based on the initial data signal and the target gray value.
If the compensation is aimed at performing accurate compensation, at the time of implementing this step, for any one light-emitting unit, the data signal compensation value corresponding to that light-emitting unit is determined using its initial data signal and target gray value.
If the compensation purpose is to perform rough compensation, when the step is implemented, initial data signals of a plurality of light emitting units in the defect area can be processed to obtain a first processing result; and processing the target gray values of the plurality of light emitting units in the defect area to obtain a second processing result. A data signal compensation value is then determined based on the first processing result and the second processing result. The first processing result may be considered as a statistical result of all initial data signals corresponding to the defective area, and illustratively, the first processing result is an average value of initial data signals corresponding to at least part of the light emitting units located in the defective area. The second processing result can be regarded as the statistical result of all target gray values corresponding to the defect area. Illustratively, the second processing result is an average value of target gray values of at least part of the light emitting cells located in the defective region. This may reduce the complexity of determining the data signal compensation value.
The specific implementation method of this step will be described in detail below by taking rough compensation as an example.
Illustratively, the method for implementing the step includes: after the initial data signal is input in the defect area in advance, determining the actual gray value of the defect area; a data signal compensation value is determined based on the actual gray value and the target gray value.
Since the compensation purpose is to make rough compensation, here the actual gray values of the defective areas are also statistical values.
The meaning of "estimated" is that, since the display panel does not display the image to be displayed at the time of executing the step, the actual gray value is not obtained by detecting the gray value of the light emitting unit of the defective area in the process of displaying the image to be displayed by the display panel.
Specific implementation methods of "predicting the actual gray value of the defective area after inputting the initial data signal into the defective area" are various, and the present application is not limited thereto.
Optionally, "estimating the actual gray value of the defective area after inputting the initial data signal in the defective area" includes: determining a reference data signal (herein "reference data signal", i.e. "first processing result" mentioned in the foregoing) based on an initial data signal corresponding to at least part of the light emitting cells located in the defective area; based on the reference data signal, an actual gray value of the defective area is determined.
The reference data signal is a result of calculating initial data signals corresponding to the plurality of light emitting units in the defect area. The present application is not limited as to how the reference data signal is specifically determined. Illustratively, a maximum value of the initial data signal corresponding to at least a portion of the light emitting cells located in the defective region is taken as the reference data signal.
Alternatively, an average value of initial data signals corresponding to at least part of the light emitting cells located in the defective region is taken as the reference data signal. By the arrangement, accidental factors can be reduced sufficiently, and the accuracy of the determined data signal compensation value is improved.
Subsequently, optionally, determining the actual gray value of the defective area based on the reference data signal comprises: acquiring a corresponding relation set of the defect area; the defect area corresponding relation set comprises the corresponding relation between the data signal and the gray value; inquiring a gray value corresponding to the reference data signal in the defect area correspondence set; and taking the inquired gray value corresponding to the reference data signal as the actual gray value of the defect area.
Optionally, the defect region correspondence relation set is pre-constructed before the defect region correspondence relation set is acquired. The method for constructing the defect area correspondence relation set may include: after the display panel is manufactured and the defect set corresponding to the display panel is obtained, testing is conducted on the defect area pointed by each defect record in the defect set. In the testing process, different data signals are input to the light-emitting units in the defect area, gray values presented by the light-emitting units under the action of the data signals are detected, and the corresponding relation between the data signals and the gray values is obtained. And adding the corresponding relation between the plurality of data signals and the gray scale values to the corresponding relation set of the defect area. In this way, a set of correspondence relationships for each defective area can be obtained.
When the gray value corresponding to the reference data signal is inquired in the defect area corresponding relation set, the data signals of the corresponding relations in the reference data signal and the defect area corresponding relation set are directly matched, and the gray value in the corresponding relation in the matching is used as the actual gray value of the defect area.
Alternatively, determining the actual gray value of the defective area based on the reference data signal includes: acquiring a functional relation between a data signal corresponding to the defect area and a gray value; and inputting the reference data signal into a functional relation between the data signal corresponding to the defect area and the gray value to obtain the actual gray value of the defect area.
Optionally, before the functional relationship between the data signal corresponding to the defective area and the gray value is obtained, the functional relationship between the data signal corresponding to the defective area and the gray value is constructed. The specific method for constructing the functional relation between the data signal corresponding to the defect area and the gray value can comprise the following steps: after the display panel is manufactured and the defect set corresponding to the display panel is obtained, testing is conducted on the defect area pointed by each defect record in the defect set. In the testing process, different data signals are input to the light-emitting units in the defect area, gray values presented by the light-emitting units under the action of the data signals are detected, and the corresponding relation between the data signals and the gray values is obtained. Based on the correspondence between the plurality of data signals and the gray value, a functional relationship between the data signals corresponding to the defective area and the gray value is obtained.
By setting the functional relation between the data signal corresponding to the defect area or the data signal corresponding to the defect area and the gray value, the actual gray value of the defect area is estimated, the purpose of rapidly and accurately estimating the actual gray value can be realized, and the speed and the accuracy of the data signal compensation value obtained later can be improved.
The "determining the data signal compensation value based on the actual gray value and the target gray value" may specifically include: and acquiring a compensation value recommendation table, wherein the compensation value recommendation table comprises a plurality of recommendation records. The recommended record comprises the corresponding relation of the gray value before compensation, the gray value after compensation and the recommended compensation value; matching the actual gray value with the gray value before compensation in each recommended record, and matching the target gray value with the gray value after compensation in each recommended record; and taking the recommended compensation value in the recommended record matched with the actual gray value and the target gray value simultaneously as a data signal compensation value.
Similarly, before the compensation value recommendation table is acquired, the compensation value recommendation table is constructed. The method for constructing the compensation value recommendation table can comprise the following steps: after the display panel is manufactured and the defect set corresponding to the display panel is obtained, testing is conducted on the defect area pointed by each defect record in the defect set. In the testing process, a first preset data signal is input to a light-emitting unit in a defect area, and the gray value presented by the light-emitting unit under the action of the first preset data signal is detected; and then adjusting the first preset data signal input by the light emitting unit to change the first preset data signal into a second preset data signal. And detecting the gray value displayed by the adjusted light-emitting unit. Taking the gray value presented by the light-emitting unit under the action of the first preset data signal as a gray value before compensation, taking the gray value presented by the light-emitting unit under the action of the second preset data signal as a gray value after compensation, and taking the difference value between the second preset data signal and the first preset data signal as a recommended compensation value to obtain a recommended record; the recommended record is added to the offset value recommendation table.
According to the technical scheme, the image to be displayed and the defect area of the display panel are acquired through setting; the defect area is positioned in the display area of the display panel; projecting the defect area to an image to be displayed to obtain a target gray value of the defect area; determining an initial data signal corresponding to a defect area when the display panel displays an image to be displayed; based on the initial data signal and the target gray value, the data signal compensation value is determined, so that the data signal compensation value can be determined according to the image to be displayed, the data signal can be compensated, the probability of bad conditions such as bright lines or dark lines and the like of the OLED display panel during image display can be reduced, and the display quality of the display panel is improved. In addition, since the above-described technical solution is to determine the data signal compensation value according to the image to be displayed, it means that the data signal compensation value determined for different images to be displayed is different, for the problem that the same defect exhibits a different degree of gray scale inaccuracy when different displayed images are displayed. The data signal compensation value is adapted to the image to be displayed. If the data signal compensation value is a dynamically changing value, not a constant value, from the point of view that the image displayed on the display panel is continuously switched over time. The method can accurately compensate the data signal for each image to be displayed, and further achieve the purpose of better display quality no matter what image is displayed by the display panel.
Further, after S140, the method further includes: determining a final data signal of each light emitting unit in the light emitting unit row corresponding to the defect area; the final data signal of the light emitting unit is the superposition result of the initial data signal and the data signal compensation value of the light emitting unit; and in the process of displaying the image to be displayed, when scanning to the light-emitting unit row corresponding to the defect area, loading the final data signal to the corresponding light-emitting unit.
The final data signal of the light emitting unit is illustratively the sum of the initial data signal of the light emitting unit and the data signal compensation value.
Further, a region occupied by the light emitting unit using the data signal compensation value in displaying the image to be displayed is defined as a compensated region. In practice, optionally, the compensated area at least partially coincides with the defective area. Specifically, the compensated region and the defective region are completely overlapped, and the areas and the shapes are the same. Alternatively, the area of the compensated area is larger than the area of the defect area, and the defect area is located within the compensated area. Alternatively, the area of the compensated area is smaller than the area of the defect area, and the compensated area is located within the defect area. Illustratively, referring to fig. 4, the defective area is located within the light emitting cell row of the 1 st-3 rd last row of the display panel, and the compensated area 40 is the area occupied by the light emitting cell row of the 1 st-3 rd last row of the display panel.
It should be noted that, in the above scheme, if the defect area includes N light emitting units, the reference data signal is determined using initial data signals of M light emitting units of the N light emitting units; essentially, a part of the light units in the defective area is selected as a representative, and the actual gray value of the defective area is determined by examining the initial data signal of the light units as a representative, which is arranged to reduce the complexity of determining the actual gray value. In practice, the representative light emitting units may be light emitting units in different rows, light emitting units in different columns, or neither rows nor columns. Wherein N and M are positive integers, and N > M.
Fig. 5 is a flowchart of another data voltage compensation method according to an embodiment of the present disclosure.
Fig. 5 is a specific example of fig. 1. Referring to fig. 5, the data voltage compensation method includes:
s210, acquiring an image to be displayed, a defect area of a display panel and a background area corresponding to the defect area; the defect area is positioned in the display area of the display panel; the background area is positioned in the display area of the display panel; the background region surrounds the defect region; or the minimum distance between the background area and the defect area is smaller than a preset distance value.
The background area is an area associated with the defective area, located at the periphery of the defective area, and can serve as a background for the defective area.
The preset distance value is a parameter for measuring whether an area can be regarded as a background area corresponding to the defective area. The specific value of the preset distance value is not limited. The preset distance value is exemplified by the size of 2 light emitting cells in the row direction (or column direction) of the light emitting cell array.
Illustratively, referring to fig. 6, the area where the solid coil is formed is the defective area 20, and the background area 30 is the portion of the virtual coil that remains after the defective area 20 is removed. Referring to fig. 7, the background region 30 does not intersect with the defect region 20, and the minimum distance between the background region 30 and the defect region 20 is less than the set distance threshold.
It should be noted that, in practice, the background area may be a non-defective area. Alternatively, the background area may be a defective area. The present application is not limited in this regard.
If the background area is a defective area, in some scenes, the influence of the defect in the background area on the display quality can be considered to be light, and when the method provided by the application is adopted to determine the data signal compensation value, the influence caused by the defect in the background area is not considered.
S220, projecting the defect area to the image to be displayed, and obtaining a target gray value of the defect area.
S230, projecting the background area to the image to be displayed to obtain a target brightness value of the background area.
The method of projecting the background area onto the image to be displayed is similar to the method of projecting the defect area onto the image to be displayed, and will not be described here.
The target brightness value is resolved from the image to be displayed, and if the image to be displayed is displayed with a better display effect, the background area should show the brightness value.
S240, determining initial data signals corresponding to the defect areas when the display panel displays the image to be displayed.
S250, determining an initial brightness value of a background area when the display panel displays an image to be displayed.
In the case that the background area is not considered to have defects, the data signal which should be applied to the background area can be obtained by analyzing the image to be displayed, and the initial brightness value is the actual brightness value of the background area after the data signal is applied to the background area.
The initial luminance value is an estimated result. The method of determining the initial brightness value of the background area is similar to the method of determining the actual gray value of the defective area, and will not be repeated here.
If the background area is a defect-free area, the initial brightness value of the background area is the same as the target brightness value of the background area. If the background area is a defective area, the initial brightness value of the background area is different from the target brightness value of the background area.
S260, determining a data signal compensation value based on the target gray value, the target luminance value, the initial data signal, and the initial luminance value.
Since the visual effect presented by the same light emitting unit at the same gray value is different when the background brightness is different. The data signal compensation value is determined by setting the target gray level value, the target brightness value, the initial data signal and the initial brightness value, so that the influence of the background brightness on the visual effect presented by the light-emitting unit is fully considered substantially, and the final display panel is ensured to have a better display effect.
It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present invention is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present invention. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present invention.
Fig. 8 is a block diagram of a data voltage compensation device according to an embodiment of the present disclosure. The data voltage compensation device is applied to a display panel, and the display panel comprises a display area.
Referring to fig. 8, the apparatus includes:
an obtaining module 310, configured to obtain an image to be displayed and a defect area of the display panel; the defect area is positioned in the display area of the display panel;
the target gray level determining module 320 is configured to project the defect area to the image to be displayed, so as to obtain a target gray level value of the defect area;
an initial data signal determining module 330, configured to determine an initial data signal corresponding to the defect area when the display panel displays the image to be displayed;
the compensation value determining module 340 is configured to determine a data signal compensation value based on the initial data signal and the target gray value.
Further, the compensation value determining module 340 is configured to:
estimating an actual gray value of the defect area after the initial data signal is input into the defect area;
and determining a data signal compensation value based on the actual gray value and the target gray value.
Further, the defect area comprises a plurality of light emitting units, and the initial data signal corresponding to the defect area comprises initial data signals of the light emitting units in the defect area;
the compensation value determining module 340 is configured to:
determining a reference data signal based on an initial data signal corresponding to at least part of the light emitting units located in the defective area;
and determining an actual gray value of the defect area based on the reference data signal.
Further, the compensation value determining module 340 is configured to:
and taking an average value of initial data signals corresponding to at least part of the light emitting units located in the defect area as a reference data signal.
Further, the compensation value determining module 340 is configured to:
acquiring a corresponding relation set of the defect area; the defect area corresponding relation set comprises the corresponding relation between the data signal and the gray value;
inquiring a gray value corresponding to the reference data signal in the defect area corresponding relation set;
and taking the queried gray value corresponding to the reference data signal as the actual gray value of the defect area.
Further, the apparatus further comprises a background determination module for:
determining a background area corresponding to the defect area; the background area is positioned in the display area of the display panel; the background region surrounds the defect region; or the minimum distance between the background area and the defect area is smaller than a preset distance value;
projecting the background area to the image to be displayed to obtain a target brightness value of the background area;
determining an initial brightness value of the background area when the display panel displays the image to be displayed;
the data signal compensation value determining module 340 is configured to:
and determining a data signal compensation value based on the target gray value, the target brightness value, the initial data signal and the initial brightness value.
Further, the apparatus further includes a loading module 350, configured to: determining a final data signal of each light emitting unit in the light emitting unit row corresponding to the defect region after determining a data signal compensation value based on the initial data signal and the target gray value; the final data signal of the light emitting unit is the superposition result of the initial data signal of the light emitting unit and the data signal compensation value;
and in the process of displaying the image to be displayed, when scanning to the light-emitting unit row corresponding to the defect area, loading a final data signal to the corresponding light-emitting unit.
The device disclosed in the above embodiment can implement the flow of the method disclosed in the above method embodiments, and has the same or corresponding beneficial effects. In order to avoid repetition, the description is omitted here.
Fig. 9 is a schematic hardware structure of a display device provided in an embodiment of the present disclosure, where, as shown in fig. 9, the display device may be a device with a display screen, such as a mobile phone, a PAD, a television, and the like, and the display device includes:
one or more processors 301, one processor 301 being illustrated in fig. 9;
a memory 302;
the display device may further include: an input device 303 and an output device 304.
The processor 301, memory 302, input device 303 and output device 304 in the display device may be connected by a bus or other means, for example in fig. 9 by a bus connection.
The memory 302 serves as a non-transitory computer readable storage medium that can be used to store software programs, computer executable programs, and modules, such as program instructions/modules corresponding to the data voltage compensation method in the embodiments of the present disclosure. The processor 301 executes various functional applications of the server and data processing, i.e., implements the data voltage compensation method of the above-described method embodiment, by running software programs, instructions, and modules stored in the memory 302.
Memory 302 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created according to the use of the display device, and the like. In addition, memory 302 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 302 may optionally include memory located remotely from processor 301, which may be connected to the terminal device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 303 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the display device. The output device 304 may include a display device such as a display screen.
The disclosed embodiments also provide a computer-readable storage medium storing a program or instructions that when executed by a computer cause the computer to perform a data voltage compensation method, the method comprising:
acquiring an image to be displayed and a defect area of the display panel; the defect area is positioned in the display area of the display panel;
projecting the defect area to the image to be displayed to obtain a target gray value of the defect area;
determining an initial data signal corresponding to the defect area when the display panel displays the image to be displayed;
a data signal compensation value is determined based on the initial data signal and the target gray value.
Optionally, the computer executable instructions, when executed by the computer processor, may also be used to perform the technical solution of the data voltage compensation method provided by any embodiment of the present disclosure.
From the above description of embodiments, it will be apparent to those skilled in the art that the present disclosure may be implemented by means of software and necessary general purpose hardware, but may of course also be implemented by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present disclosure may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk, or an optical disk of a computer, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the embodiments of the present disclosure.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. A data voltage compensation method, wherein the data voltage compensation method is applied to a display panel, the display panel including a display area, the method comprising:
acquiring an image to be displayed and a defect area of the display panel; the defect area is positioned in the display area of the display panel;
projecting the defect area to the image to be displayed to obtain a target gray value of the defect area;
determining an initial data signal corresponding to the defect area when the display panel displays the image to be displayed;
a data signal compensation value is determined based on the initial data signal and the target gray value.
2. The method of claim 1, wherein the determining a data signal compensation value based on the initial data signal and the target gray value comprises:
estimating an actual gray value of the defect area after the initial data signal is input into the defect area;
and determining a data signal compensation value based on the actual gray value and the target gray value.
3. The method of claim 2, wherein the defective area includes a plurality of light emitting cells therein, and the initial data signal corresponding to the defective area includes an initial data signal of each of the light emitting cells located in the defective area;
the predicting determining the actual gray value of the defect area after the initial data signal is input into the defect area comprises the following steps:
determining a reference data signal based on an initial data signal corresponding to at least part of the light emitting units located in the defective area;
and determining an actual gray value of the defect area based on the reference data signal.
4. A method according to claim 3, wherein said determining a reference data signal based on an initial data signal corresponding to at least part of the light emitting cells located in said defective area comprises:
and taking an average value of initial data signals corresponding to at least part of the light emitting units located in the defect area as a reference data signal.
5. A method according to claim 3, wherein said determining an actual gray value of said defective area based on said reference data signal comprises:
acquiring a corresponding relation set of the defect area; the defect area corresponding relation set comprises the corresponding relation between the data signal and the gray value;
inquiring a gray value corresponding to the reference data signal in the defect area corresponding relation set;
and taking the queried gray value corresponding to the reference data signal as the actual gray value of the defect area.
6. The method as recited in claim 1, further comprising:
determining a background area corresponding to the defect area; the background area is positioned in the display area of the display panel; the background region surrounds the defect region; or the minimum distance between the background area and the defect area is smaller than a preset distance value;
projecting the background area to the image to be displayed to obtain a target brightness value of the background area;
determining an initial brightness value of the background area when the display panel displays the image to be displayed;
the determining a data signal compensation value based on the initial data signal and the target gray value includes:
and determining a data signal compensation value based on the target gray value, the target brightness value, the initial data signal and the initial brightness value.
7. The method of claim 1, wherein after determining a data signal compensation value based on the initial data signal and the target gray value, further comprising:
determining a final data signal of each light emitting unit in the light emitting unit row corresponding to the defect area; the final data signal of the light emitting unit is the superposition result of the initial data signal of the light emitting unit and the data signal compensation value;
and in the process of displaying the image to be displayed, when scanning to the light-emitting unit row corresponding to the defect area, loading a final data signal to the corresponding light-emitting unit.
8. A data voltage compensation device, wherein the data voltage compensation device is applied to a display panel, the display panel including a display area, the device comprising:
the acquisition module is used for acquiring an image to be displayed and a defect area of the display panel; the defect area is positioned in the display area of the display panel;
the target gray level determining module is used for projecting the defect area to the image to be displayed to obtain a target gray level value of the defect area;
the initial data signal determining module is used for determining initial data signals corresponding to the defect areas when the display panel displays the image to be displayed;
and the compensation value determining module is used for determining a data signal compensation value based on the initial data signal and the target gray value.
9. A display device comprising the data voltage compensation device of claim 9.
10. A display device, comprising: a processor and a memory;
the processor is adapted to perform the steps of the method according to any of claims 1 to 7 by invoking a program or instruction stored in the memory.
11. A computer readable storage medium storing a program or instructions for causing a computer to perform the steps of the method according to any one of claims 1 to 7.
CN202311413689.6A 2023-10-27 2023-10-27 Data voltage compensation method, data voltage compensation device and display device Pending CN117351889A (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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