CN110992864B - Compensation method and compensation device of display panel and display device - Google Patents
Compensation method and compensation device of display panel and display device Download PDFInfo
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Abstract
The invention provides a compensation method, a compensation device and a display device of a display panel, wherein the compensation method of the display panel comprises the steps of obtaining a first display gray scale of a target pixel included in an input signal, and converting the first display gray scale into a second display gray scale according to the conversion relation between the first display gray scale and the second display gray scale; converting the second display gray scale into a third display gray scale through binary conversion and byte reduction, wherein the gray scale number of a gray scale format corresponding to the third display gray scale is equal to the gray scale number of a gray scale format corresponding to the first display gray scale, and the third display gray scale is lower than the first display gray scale; and performing overdrive compensation on a target pixel based on the third display gray scale to determine the gamma voltage of the target pixel. The embodiment of the invention can improve the actual gamma voltage through overvoltage driving, realize the improvement of the charging rate of the target pixel when displaying the high gray scale and contribute to improving the display effect.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a compensation method and a compensation apparatus for a display panel, and a display apparatus.
Background
In the driving process of the display device, the TFTs (Thin Film transistors) of each row are controlled to be turned on next time under the control of the scan signal, and then the data signal is transmitted to each row through the source line to charge the capacitors corresponding to the pixel points of each row.
However, in practical use, due to the existence of the panel RC loading, there is attenuation in the process of transmitting the data signals to each row, and meanwhile, for a display panel with a large size, a high resolution or a high refresh frequency, the RC loading itself is large, and the refresh time is reduced with the increase of the refresh frequency, and further the GOE (Gate Output Enable) time is subtracted, so that the actual charging time is shorter, which is likely to cause insufficient charging, and affect the display effect.
Disclosure of Invention
The embodiment of the invention provides a compensation method and a compensation device for a display panel and a display device, and aims to solve the problem that the display panel is possibly insufficiently charged due to RC loading and the display effect is influenced.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a compensation method for a display panel, including the following steps:
acquiring a first display gray scale of a target pixel included in an input signal, and converting the first display gray scale into a second display gray scale according to a conversion relation between the first display gray scale and the second display gray scale, wherein the gray scale level of a gray scale format corresponding to the second display gray scale is greater than the gray scale level of a gray scale format corresponding to the first display gray scale;
converting the second display gray scale into a third display gray scale through binary conversion and byte reduction, wherein the gray scale level of a gray scale format corresponding to the third display gray scale is equal to the gray scale level of a gray scale format corresponding to the first display gray scale, and the third display gray scale is lower than the first display gray scale;
and performing overdrive compensation on a target pixel based on the third display gray scale to determine the gamma voltage of the target pixel.
Optionally, before converting the first display gray scale into the second display gray scale, the method includes:
determining a first gray scale format according to the gray scale level of the gray scale format corresponding to the first display gray scale, wherein the gray scale level of the first gray scale format is greater than the gray scale level of the gray scale format corresponding to the first display gray scale;
keeping the gray scale level unchanged, and reducing the output range of the first gray scale format to obtain a second gray scale format;
and taking the conversion relation between the gray scale format corresponding to the first display gray scale and the second gray scale format as the conversion relation between the first display gray scale and the second display gray scale.
Optionally, a gray scale level of a gray scale format corresponding to the first display gray scale is 256 gray scales, the first gray scale format is an ACC format for accurate color processing, and the gray scale level of the first gray scale format is 1024 gray scales.
Optionally, the converting the second display gray scale into a third display gray scale by a binary conversion and a byte reduction includes:
representing the second display gray scale as a twelve-bit binary value;
removing four bits from the twelve-bit binary value to obtain an eight-bit binary value;
and converting the binary numerical value of eight bits into a decimal numerical value as the third display gray scale.
Optionally, the determining the gamma voltage of the target pixel according to the compensation result includes:
under the condition that the first display gray scale is 255 gray scales, converting the first display gray scale into a corresponding target gray scale when the first display gray scale is the third display gray scale;
taking the gamma voltage corresponding to the first display gray scale of 255 gray scales as the gamma voltage corresponding to the target gray scale;
calculating gamma voltages of all levels of gray scales corresponding to the third display gray scale by using the conversion relation of the gamma voltages of all levels of gray scales;
and determining the gray scale level when the display gray scale of the target pixel is converted into the third display gray scale according to the over-drive compensation result, and determining the gamma voltage of the target pixel according to the gamma voltage of each gray scale corresponding to the calculated third display gray scale.
In a second aspect, an embodiment of the present invention provides a compensation apparatus for a display panel, including:
the display device comprises a gray scale conversion module, a first display gray scale conversion module and a second display gray scale conversion module, wherein the gray scale conversion module is used for acquiring a first display gray scale of a target pixel included in an input signal and converting the first display gray scale into a second display gray scale according to a conversion relation between the first display gray scale and the second display gray scale, and the gray scale level of a gray scale format corresponding to the second display gray scale is larger than the gray scale level of a gray scale format corresponding to the first display gray scale;
the gray scale conversion module is used for converting the second display gray scale into a third display gray scale through carrying scale conversion and byte reduction, wherein the gray scale level of a gray scale format corresponding to the third display gray scale is equal to the gray scale level of a gray scale format corresponding to the first display gray scale, and the third display gray scale is lower than the first display gray scale;
and the compensation module is used for performing overdrive compensation on the target pixel based on the third display gray scale so as to determine the gamma voltage of the target pixel.
Optionally, the method further includes:
the gray scale level determining module is used for determining a first gray scale format according to the gray scale level of the gray scale format corresponding to the first display gray scale, wherein the gray scale level of the first gray scale format is greater than the gray scale level of the gray scale format corresponding to the first display gray scale;
the order chopping module is used for keeping the gray scale level unchanged and reducing the output range of the first gray scale format to obtain a second gray scale format;
and the conversion relation determining module is used for taking the conversion relation between the gray scale format corresponding to the first display gray scale and the second gray scale format as the conversion relation between the first display gray scale and the second display gray scale.
Optionally, a gray scale level of a gray scale format corresponding to the first display gray scale is 256 gray scales, the first gray scale format is an ACC format for accurate color processing, and the gray scale level of the first gray scale format is 1024 gray scales.
Optionally, the grayscale conversion module includes:
a first conversion submodule for expressing the second display gray scale as a binary value of twelve bits;
the removing submodule is used for removing the four bits after the twelve-bit binary value to obtain an eight-bit binary value;
and the second conversion submodule is used for converting the binary numerical value of eight bits into a decimal numerical value as the third display gray scale.
Optionally, the compensation module includes:
the gray scale obtaining submodule is used for obtaining a corresponding target gray scale when the first display gray scale is 255 gray scales and converting the first display gray scale into the third display gray scale;
the voltage determining submodule is used for taking the gamma voltage corresponding to the first display gray scale of 255 gray scales as the gamma voltage corresponding to the target gray scale;
the voltage calculation submodule is used for calculating gamma voltages of all levels of gray scales corresponding to the third display gray scale by using the conversion relation of the gamma voltages of all levels of gray scales;
and the compensation submodule is used for determining the gray scale level when the display gray scale of the target pixel is converted into the third display gray scale according to the over-drive compensation result, and determining the gamma voltage of the target pixel according to the gamma voltage of each gray scale corresponding to the calculated third display gray scale.
In a third aspect, an embodiment of the present invention further provides a display device, including the compensation device for a display panel described in any one of the above.
In the embodiment of the invention, the first display gray scale is converted into the second display gray scale, and then the second display gray scale is converted into the third display gray scale through binary conversion and byte reduction, so that the gray scale voltage value of the third display gray scale is equal to the gray scale voltage value of the first display gray scale, and as the gray scale total grade of the first display gray scale is equal to the gray scale total grade of the third display gray scale, and the third display gray scale is lower than the first display gray scale, the actual gamma voltage can be improved by performing overvoltage driving on the third display gray scale, thereby improving the charging rate of the target pixel when displaying the high gray scale and being beneficial to improving the display effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a flowchart illustrating a compensation method for a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a display state of the display panel according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of waveforms of scan signals and pixel gamma voltages according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a gamma voltage of a pixel according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating a compensation method for a display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a compensation apparatus of a display panel according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that, in the related art, the charging rate of the pixel may be increased by Over driving compensation (Over driving) for each pixel of the display panel, where the Over driving compensation means that an actual gamma voltage is greater than a gamma voltage corresponding to a display gray scale.
Taking the gray scale format of an image as 0 to 255 gray scales as an example, if the current gray scale of a certain pixel is 100 gray scales and the next display gray scale is 150 gray scales, the actually loaded gamma voltage may be the gamma voltage corresponding to 155 gray scales, so as to improve the charging rate of the pixel and shorten the charging time.
However, when displaying a high gray level, for example, if the gray level to be displayed by a certain pixel is 255 gray levels, since a higher gray level voltage cannot be provided for the pixel, the pixel cannot be overdriven and compensated, which may result in an insufficient charging rate of the pixel, thereby possibly affecting the display effect. That is, the related art solution cannot effectively compensate for the pixels with high display gray levels.
The embodiment of the invention provides a compensation method of a display panel.
As shown in fig. 1, in one embodiment, the compensation method of the display panel includes the following steps:
step 101: the method comprises the steps of obtaining a first display gray scale of a target pixel included in an input signal, and converting the first display gray scale into a second display gray scale according to the conversion relation between the first display gray scale and the second display gray scale.
In this embodiment, the gray scale level of the gray scale format corresponding to the second display gray scale is greater than the gray scale level of the gray scale format corresponding to the first display gray scale. Here, the gray scale level refers to a total level of gray scales included in one gray scale format.
For example, one common gray scale format has 256 gray scale levels, including 0 to 255 for a total of 256 gray scale levels; for example, in the related art, the gray scale level of one gray scale format is 4096, the gray scale level of the other gray scale format is 16384, and the like, and a certain conversion relationship exists between different gray scale formats.
In the present embodiment, the first display gray scale is first converted into a gray scale format with a higher gray scale level, and the specific conversion method can refer to the related art, which is not further limited and described herein.
In an alternative embodiment, the gray scale format of the first display gray scale is 256 commonly used gray scales, and the gray scale format of the second display gray scale is ACC (Accurate Color Capture), that is, the gray scale levels of the second display gray scale are 1024 levels, including 1024 gray scale levels in total from 0 to 1023, and the output range is from 0 to 4092. Obviously, the gray scale format is not limited to this.
Step 102: and converting the second display gray scale into a third display gray scale through a carry-to-carry conversion and byte reduction.
The display gray scale of the pixel can be converted into different expression modes, such as a binary expression mode.
For example, 255 gray scale is converted to 11111111 binary, and 1023 gray scale is converted to 1111111111 binary.
After the binary conversion is completed, the byte reduction process is further performed, and it should be understood that, after the byte reduction process is performed, the gray scale number of the third display gray scale is equal to that of the first display gray scale, i.e., the gray scale format thereof is the same, and the third display gray scale is lower than the first display gray scale due to the byte reduction process.
For example, in one embodiment, the first display gray level is 255 gray levels, the corresponding second display gray level is 1023 gray levels, and after the binary conversion and byte reduction, the third display gray level is lower than the first display gray level, such as 245 gray level.
Step 103: and performing overdrive compensation on a target pixel based on the third display gray scale to determine the gamma voltage of the target pixel.
Since the obtained third display gray scale is lower than the first display gray scale and has the same gray scale format, even if the first display gray scale is 255 gray scales, the third display gray scale is not the maximum gray scale, for example, the third display gray scale may be 245 gray scales, so that the display panel can provide a higher gamma voltage, realize the overdrive driving of the gray scale voltage required by the third display gray scale, and ensure that the charging rate meets the requirement.
In the embodiment of the invention, the first display gray scale is converted into the second display gray scale, and then the second display gray scale is converted into the third display gray scale through binary conversion and byte reduction, so that the gray scale voltage value of the third display gray scale is equal to the gray scale voltage value of the first display gray scale, and as the gray scale total grade of the first display gray scale is equal to the gray scale total grade of the third display gray scale, and the third display gray scale is lower than the first display gray scale, the actual gamma voltage can be improved by performing overvoltage driving on the third display gray scale, thereby improving the charging rate of the target pixel when displaying the high gray scale and being beneficial to improving the display effect.
In an optional specific embodiment, before the step 101, the method further includes:
determining a first gray scale format according to the gray scale level of the gray scale format corresponding to the first display gray scale, wherein the gray scale level of the first gray scale format is greater than the gray scale level of the gray scale format corresponding to the first display gray scale;
keeping the gray scale level unchanged, and reducing the output range of the first gray scale format to obtain a second gray scale format;
and taking the conversion relation between the gray scale format corresponding to the first display gray scale and the second gray scale format as the conversion relation between the first display gray scale and the second display gray scale.
The gray scale level of the first display gray scale is determined by the format of the signal input by the display panel, for example, the gray scale level corresponding to the gray scale from 0 to 255 is a gray scale format of 256 levels.
The first gray scale format and the first gray scale format are used for determining a second display gray scale.
In the embodiment, the first target gray levels include 1024 gray levels in total from 0 to 1023 as an example, and the output range is 0 to 4092 as shown in table 1.
Table 1: gray scale output range corresponding to the first gray scale format
In this embodiment, the first gray scale format is first processed by chopping to obtain the second gray scale format,
specifically, the gray scale level is kept unchanged, and then the output range is reduced, for example, the gray scale level is kept unchanged from 0 to 1023, then the output range is reduced from 0 to 4092 to 0 to M, M is a positive integer less than 4092, and the specific value can be selectively set according to the situation, as shown in table 2, in this embodiment, M is 3568 for example, but in practical implementation, the value of M is not limited thereto.
Table 2: gray scale output range corresponding to the second gray scale format
Thus, the correspondence relationship between the first display gray scale and the second gray scale format is the correspondence relationship between the gray scales of 0 to 255 and the output range of 0 to 3568 of the second gray scale format. After the corresponding relationship is determined, the first display gray scale can be converted into the second display gray scale through the corresponding relationship. For example, in the case where the first display gray scale is 255 gray scales, the second display gray scale is 3568.
Further, in an alternative embodiment, the step 102 includes:
representing the second display gray scale as a twelve-bit binary value;
removing four bits from the twelve-bit binary value to obtain an eight-bit binary value;
and converting the binary numerical value of the eight bits into a decimal numerical value as the third display gray scale.
The first display gray scale is 255 gray scales, and the second display gray scale obtained by conversion is 3568. As shown in fig. 2, fig. 2 is a schematic diagram illustrating a state of a display panel when a display gray scale of a local pixel is 255 gray scales.
As shown in Table 3, the second display gray is represented as a binary value of 110111110000, and the eight-bit binary value obtained by removing the next four bits is 11011111, which is converted to a decimal value of 223, that is, the binary value obtained by the conversion is 223 gray.
Table 3: byte reduction schematic table
| Bit | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| |
1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
Optionally, the determining the gamma voltage of the target pixel according to the compensation result includes:
under the condition that the first display gray scale is 255 gray scales, converting the first display gray scale into a corresponding target gray scale when the first display gray scale is the third display gray scale;
taking the gamma voltage corresponding to the first display gray scale of 255 as the gamma voltage corresponding to the target gray scale;
calculating gamma voltages of all levels of gray scales corresponding to the third display gray scale by using the conversion relation of the gamma voltages of all levels of gray scales;
and determining the gray scale level when the display gray scale of the target pixel is converted into the third display gray scale according to the over-drive compensation result, and determining the gamma voltage of the target pixel according to the gamma voltage of each gray scale corresponding to the calculated third display gray scale.
Taking the example that the first display gray scale is 255 gray scales and the corresponding third display gray scale is 223 gray scales in the above embodiment as an example, the gamma voltages are the same, that is, when the third display gray scale is 223 gray scales, the gamma voltage is equal to the gamma voltage of 255 gray scales for the first display gray scale.
Further, the gamma voltages of the respective gray scales corresponding to the third display gray scale are calculated according to the gamma voltage values, and after the gamma voltage of one gray scale is determined, the gamma voltages of other gray scales can be calculated according to the corresponding relationship, for example, the gamma voltages of the other gray scales can be obtained according to a gamma 2.2 curve.
Thus, when the 255 gray scale in the first display gray scale is converted into the 223 gray scale in the third display gray scale, the converted third display gray scale can be further overdriven and compensated, so that the gamma voltage required by the third display gray scale can be further determined, the overdrive driving of the target pixel is realized, the charging rate of the target pixel is ensured to meet the requirement,
referring to fig. 3 and 4, in fig. 3, a curve with a lower pixel voltage value is a pixel gamma voltage waveform without overdrive compensation, a curve with a higher pixel voltage value is a pixel gamma voltage waveform after overdrive compensation by using the technical solution of the present embodiment, and a difference between the maximum values of the two is an overdrive compensation value Vod.
In fig. 4, the left side shows the corresponding relationship between the display gray scale without the overdrive compensation and the gamma voltage, and the right side shows the corresponding relationship between the display gray scale after the overdrive compensation and the gamma voltage according to the technical solution of this embodiment. The gray scale voltages corresponding to the 0 gray scales are the same, and the compensated 255 gray scale voltage is the gamma voltage corresponding to V1+ Vod (positive polarity frame) or V18-Vod (negative polarity frame), wherein V1 (positive polarity frame) or V18 (negative polarity frame) is the gamma voltage of the original 255 gray scale.
With continued reference to fig. 3 and 4, it can be understood that, in the related art, if the display gray scale of a pixel is 255 gray scales, the corresponding ACC result is 4092, the frame rate control module outputs 255, the overdrive compensation result is 255, and the control chip finally outputs 255 gray scales, and the corresponding gamma voltage is V1 (positive polarity frame) or V18 (negative polarity frame).
In the technical solution of this embodiment, if the display gray scale of a pixel is 255 gray scales, the corresponding ACC result is 3568, the frame rate control module outputs 223 the result, the overdrive compensation result is 255, the control chip outputs 255 gray scales finally, and the corresponding gamma voltage is V1+ Vod (positive polarity frame) or V18-Vod (negative polarity frame).
Referring to tables 4 and 5, in tables 4 and 5, the first row is the gray level of the current row, the left row is the gray level of the next row, and the determined value according to the gray level of each current row and the gray level of the next row is the overdrive voltage of the next row.
As shown in table 4, in the related art, if the gray scale of the current row is 0 gray scale and the gray scale of the next row is 255 gray scale, the overdrive voltage can only be the driving voltage corresponding to 255 gray scale, and the overdrive driving is not actually implemented, which may result in insufficient charging rate.
As shown in table 5, after the technical solution of the present embodiment is applied, if the display gray scale of the current row is 0 gray scale and the display gray scale of the next row is 223 gray scale (the index value in the table is actually 224 gray scale), the actual overdrive voltage is the driving voltage corresponding to 255 gray scale, i.e. V1+ Vod (positive polarity frame) or V18-Vod (negative polarity frame), and overdrive can be implemented to ensure the charging rate.
Table 4: overdrive driving table in related art
| 0 | 16 | 32 | 48 | 64 | 80 | 96 | 112 | 128 | 144 | 160 | 176 | 192 | 208 | 224 | 240 | 255 | |
| 0 | 0 | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … |
| 16 | … | 16 | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … |
| 32 | … | … | 32 | … | … | … | … | … | … | … | … | … | … | … | … | … | … |
| 48 | … | … | … | 48 | … | … | … | … | … | … | … | … | … | … | … | … | … |
| 64 | … | … | … | … | 64 | … | … | … | … | … | … | … | … | … | … | … | … |
| 80 | … | … | … | … | … | 80 | … | … | … | … | … | … | … | … | … | … | … |
| 96 | … | … | … | … | … | … | 96 | … | … | … | … | … | … | … | … | … | … |
| 112 | … | … | … | … | … | … | … | 112 | … | … | … | … | … | … | … | … | … |
| 128 | … | … | … | … | … | … | … | … | 128 | … | … | … | … | … | … | … | … |
| 144 | … | … | … | … | … | … | … | … | … | 144 | … | … | … | … | … | … | … |
| 160 | … | … | … | … | … | … | … | … | … | … | 160 | … | … | … | … | … | … |
| 176 | … | … | … | … | … | … | … | … | … | … | … | 176 | … | … | … | … | … |
| 192 | … | … | … | … | … | … | … | … | … | … | … | … | 192 | … | … | … | … |
| 208 | … | … | … | … | … | … | … | … | … | … | … | … | … | 208 | … | … | … |
| 224 | … | … | … | … | … | … | … | … | … | … | … | … | … | … | 224 | … | … |
| 240 | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | 240 | … |
| 255 | 255 | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | 255 |
Table 5: overdrive drive table in this embodiment
The overdrive compensation value Vod is a compensation amount determined according to a performance parameter of the display panel, and is smaller if the charging rate of the display panel is higher, and is larger if the charging rate of the display panel is smaller, and may be measured through experiments or set empirically.
For example, the overdrive compensation value is set relatively large for a large-sized, high-resolution or high-refresh-frequency display panel, whereas the overdrive compensation value is set relatively small for a small-sized, low-resolution or low-refresh-frequency display panel.
As shown in fig. 5 and fig. 6, in implementation, after the control module (TCON) obtains the input signal, that is, after the first display gray scale is obtained, the accurate color processing module processes the input signal to obtain the second display gray scale, and then the frame rate control module processes the second display gray scale to obtain the third display gray scale.
Further, it is required to determine whether overdrive compensation is required for the target pixel, and it should be understood that, in this embodiment, the technical solution of this embodiment may be applied to pixels with different display gray scales, but mainly aims at pixels with high display gray scale, for example, pixels with a display gray scale of 255 in a 0 to 255 gray scale format.
In one embodiment, the overdrive compensation is mainly performed for pixels with display gray levels larger than a preset gray level threshold.
In this embodiment, the preset gray level threshold should be set according to the actual situation of the display panel, mainly considering the possible influence of factors such as size and refresh frequency on the charging rate, and if the charging rate of the display panel is higher, the preset gray level threshold should be set to be higher.
For example, the charging rate of a certain display panel is relatively high, and overdrive compensation is performed when the display gray scale is 255 gray scales; for another example, the charging rate of a certain display panel is relatively low, and it may be necessary to set the predetermined gray level threshold to 250 gray levels.
If the overdrive compensation is needed to be carried out on one pixel, the overdrive compensation is carried out on the pixel based on the third display gray scale to obtain the needed gamma voltage; if the overdrive compensation is not required, the gamma voltage can be directly determined at the third display gray scale.
Further, after the data signal is further subjected to data decoding and digital-to-analog conversion by the data module, data output is performed to output the corresponding gamma voltage to the display panel, which refers to the related art and is not described herein again.
The embodiment of the invention also provides a compensation device 700 of the display panel.
As shown in fig. 7, the compensation apparatus 700 of the display panel includes:
the gray scale conversion module 701 is used for acquiring a first display gray scale of a target pixel included in an input signal, and converting the first display gray scale into a second display gray scale according to a conversion relation between the first display gray scale and the second display gray scale, wherein the gray scale level of a gray scale format corresponding to the second display gray scale is greater than the gray scale level of the gray scale format corresponding to the first display gray scale;
a gray scale conversion module 702, configured to convert the second display gray scale into a third display gray scale through binary conversion and byte reduction, where a gray scale level of a gray scale format corresponding to the third display gray scale is equal to a gray scale level of a gray scale format corresponding to the first display gray scale, and the third display gray scale is lower than the first display gray scale;
the compensation module 703 is configured to perform overdrive compensation on the target pixel based on the third display gray scale to determine a gamma voltage of the target pixel.
Optionally, the method further includes:
the gray scale level determining module is used for determining a first gray scale format according to the gray scale level of the gray scale format corresponding to the first display gray scale, wherein the gray scale level of the first gray scale format is greater than the gray scale level of the gray scale format corresponding to the first display gray scale;
the order chopping module is used for keeping the gray scale level unchanged and reducing the output range of the first gray scale format to obtain a second gray scale format;
and the conversion relation determining module is used for taking the conversion relation between the gray scale format corresponding to the first display gray scale and the second gray scale format as the conversion relation between the first display gray scale and the second display gray scale.
Optionally, the gray scale level of the gray scale format corresponding to the first display gray scale is 256 gray scales, the first gray scale format is an ACC format for accurate color processing, and the gray scale level of the first gray scale format is 1024 gray scales.
Optionally, the grayscale conversion module 702 includes:
a first conversion sub-module for representing the second display gray scale as a binary value of twelve bits;
the removing submodule is used for removing the four bits after the twelve-bit binary value to obtain an eight-bit binary value;
and the second conversion submodule is used for converting the binary numerical value of eight bits into a decimal numerical value as the third display gray scale.
Optionally, the compensation module 703 includes:
the gray scale obtaining submodule is used for obtaining a corresponding target gray scale when the first display gray scale is 255 gray scales and converting the first display gray scale into the third display gray scale;
the voltage determination submodule is used for taking the gamma voltage corresponding to the first display gray scale of 255 as the gamma voltage corresponding to the target gray scale;
the voltage calculation submodule is used for calculating gamma voltages of all levels of gray scales corresponding to the third display gray scale by using the conversion relation of the gamma voltages of all levels of gray scales;
and the compensation submodule is used for determining the gray scale level when the display gray scale of the target pixel is converted into the third display gray scale according to the over-drive compensation result, and determining the gamma voltage of the target pixel according to the gamma voltage of each gray scale corresponding to the calculated third display gray scale.
The compensation device 700 and the display device of the display panel according to the embodiments of the present invention can implement the processes in the above method embodiments, and are not described herein again to avoid repetition.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A compensation method of a display panel is characterized by comprising the following steps:
acquiring a first display gray scale of a target pixel included in an input signal, and converting the first display gray scale into a second display gray scale according to a conversion relation between the first display gray scale and the second display gray scale, wherein the gray scale level of a gray scale format corresponding to the second display gray scale is greater than the gray scale level of a gray scale format corresponding to the first display gray scale;
converting the second display gray scale into a third display gray scale through binary conversion and byte reduction, wherein the gray scale level of a gray scale format corresponding to the third display gray scale is equal to the gray scale level of a gray scale format corresponding to the first display gray scale, and the third display gray scale is lower than the first display gray scale;
performing overdrive compensation on a target pixel based on the third display gray scale to determine a gamma voltage of the target pixel;
the converting the second display gray scale to a third display gray scale by a binary conversion and a byte reduction, comprising:
representing the second display gray scale as a twelve-bit binary value;
removing four bits from the twelve-bit binary value to obtain an eight-bit binary value;
and converting the binary numerical value of the eight bits into a decimal numerical value as the third display gray scale.
2. The compensation method as claimed in claim 1, wherein the step of converting the first display gray scale to the second display gray scale comprises:
determining a first gray scale format according to the gray scale level of the gray scale format corresponding to the first display gray scale, wherein the gray scale level of the first gray scale format is greater than the gray scale level of the gray scale format corresponding to the first display gray scale;
keeping the gray scale level unchanged, and reducing the output range of the first gray scale format to obtain a second gray scale format;
and taking the conversion relation between the gray scale format corresponding to the first display gray scale and the second gray scale format as the conversion relation between the first display gray scale and the second display gray scale.
3. The method as claimed in claim 2, wherein the gray scale level of the gray scale format corresponding to the first display gray scale is 256 gray scales, the first gray scale format is ACC format for precise color processing, and the gray scale level of the first gray scale format is 1024 gray scales.
4. The compensation method as claimed in claim 3, wherein the overdriving compensating the target pixel based on the third display gray scale to determine the gamma voltage of the target pixel comprises:
under the condition that the first display gray scale is 255 gray scales, converting the first display gray scale into a corresponding target gray scale when the first display gray scale is the third display gray scale;
taking the gamma voltage corresponding to the first display gray scale of 255 gray scales as the gamma voltage corresponding to the target gray scale;
calculating gamma voltages of all levels of gray scales corresponding to the third display gray scale by using the conversion relation of the gamma voltages of all levels of gray scales;
and determining the gray scale level when the display gray scale of the target pixel is converted into the third display gray scale according to the over-drive compensation result, and determining the gamma voltage of the target pixel according to the gamma voltage of each gray scale corresponding to the calculated third display gray scale.
5. A compensation apparatus for a display panel, comprising:
the display device comprises a gray scale conversion module, a first display gray scale conversion module and a second display gray scale conversion module, wherein the gray scale conversion module is used for acquiring a first display gray scale of a target pixel included in an input signal and converting the first display gray scale into a second display gray scale according to a conversion relation between the first display gray scale and the second display gray scale, and the gray scale level of a gray scale format corresponding to the second display gray scale is larger than the gray scale level of a gray scale format corresponding to the first display gray scale;
the gray scale conversion module is used for converting the second display gray scale into a third display gray scale through carrying scale conversion and byte reduction, wherein the gray scale level of a gray scale format corresponding to the third display gray scale is equal to the gray scale level of a gray scale format corresponding to the first display gray scale, and the third display gray scale is lower than the first display gray scale;
the compensation module is used for performing over-drive compensation on a target pixel based on the third display gray scale so as to determine the gamma voltage of the target pixel;
the gray scale conversion module comprises:
a first conversion sub-module for representing the second display gray scale as a binary value of twelve bits;
the removing submodule is used for removing the four bits after the twelve-bit binary value to obtain an eight-bit binary value;
and the second conversion submodule is used for converting the binary numerical value of eight bits into a decimal numerical value as the third display gray scale.
6. The compensation apparatus for a display panel according to claim 5, further comprising:
the gray scale level determining module is used for determining a first gray scale format according to the gray scale level of the gray scale format corresponding to the first display gray scale, wherein the gray scale level of the first gray scale format is greater than the gray scale level of the gray scale format corresponding to the first display gray scale;
the order chopping module is used for keeping the gray scale level unchanged and reducing the output range of the first gray scale format to obtain a second gray scale format;
and the conversion relation determining module is used for taking the conversion relation between the gray scale format corresponding to the first display gray scale and the second gray scale format as the conversion relation between the first display gray scale and the second display gray scale.
7. The compensation apparatus for a display panel according to claim 6, wherein the gray scale level of the gray scale format corresponding to the first display gray scale is 256 gray scales, the first gray scale format is ACC format for accurate color processing, and the gray scale level of the first gray scale format is 1024 gray scales.
8. The compensation apparatus of a display panel according to claim 7, wherein the compensation module comprises:
the gray scale obtaining submodule is used for obtaining a corresponding target gray scale when the first display gray scale is 255 gray scales and converting the first display gray scale into the third display gray scale;
the voltage determining submodule is used for taking the gamma voltage corresponding to the first display gray scale of 255 gray scales as the gamma voltage corresponding to the target gray scale;
the voltage calculation submodule is used for calculating gamma voltages of all levels of gray scales corresponding to the third display gray scale by using the conversion relation of the gamma voltages of all levels of gray scales;
and the compensation submodule is used for determining the gray scale level when the display gray scale of the target pixel is converted into the third display gray scale according to the over-drive compensation result, and determining the gamma voltage of the target pixel according to the gamma voltage of each gray scale corresponding to the calculated third display gray scale.
9. A display device characterized by comprising the compensation device of the display panel according to any one of claims 5 to 8.
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