CN110992864B - Compensation method and compensation device of display panel and display device - Google Patents

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

Compensation method for display panel, compensation device and display device

technical field

The present invention relates to the field of display technology, and in particular, to a compensation method for a display panel, a compensation device and a display device.

Background technique

During the driving process of the display device, the TFT (Thin Film Transistor) of each row is controlled to be turned on under the control of the scanning signal, and then the data signal is transmitted to each row through the source line to charge the capacitor corresponding to the pixel point of each row. .

However, in actual use, due to the existence of RC loading on the panel, there will be attenuation in the process of data signal transmission to each row. At the same time, for a display panel with large size, high resolution or high refresh frequency, its RCloading is relatively large, and The refresh time decreases with the increase of the refresh frequency. If the GOE (Gate Output Enable) time is further subtracted, the actual charging time is shorter, so it is likely to cause insufficient charging and affect the display effect.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a compensation method, a compensation device and a display device for a display panel, so as to solve the problem that the display panel may be insufficiently charged due to the existence of RC loading and affect the display effect.

In order to solve the above-mentioned technical problems, the present invention is achieved in this way:

In a first aspect, an embodiment of the present invention provides a compensation method for a display panel, including the following steps:

Obtain the first display grayscale of the target pixel included in the input signal, and convert the first display grayscale into the second display grayscale according to the conversion relationship between the first display grayscale and the second display grayscale, wherein the The number of grayscales of the grayscale format corresponding to the second display grayscale is greater than the number of grayscales of the grayscale format corresponding to the first display grayscale;

The second display grayscale is converted into a third display grayscale through binary conversion and byte reduction, and the number of grayscales in the grayscale format corresponding to the third display grayscale is equal to the number of grayscales corresponding to the first display grayscale the number of gray levels in a gray level format, and the third display gray level is lower than the first display gray level;

Perform overdrive compensation on the target pixel based on the third display gray level to determine the gamma voltage of the target pixel.

Optionally, before the conversion of the first display grayscale to the second display grayscale, includes:

The first grayscale format is determined according to the grayscale number of the grayscale format corresponding to the first display grayscale, wherein the grayscale number of the first grayscale format is greater than the grayscale format corresponding to the first display grayscale The number of gray classes;

Keep the number of grayscales unchanged, and reduce the output range of the first grayscale format to obtain a second grayscale format;

The conversion relationship between the grayscale format corresponding to the first display grayscale and the second grayscale format is used as the conversion relationship between the first display grayscale and the second display grayscale.

Optionally, the number of grayscales of the grayscale format corresponding to the first display grayscale is 256 grayscales, the first grayscale format is an accurate color processing ACC format, and the grayscale of the first grayscale format is The number is 1024 grayscale.

Optionally, converting the second display grayscale into a third display grayscale through binary conversion and byte reduction, including:

Representing the second display gray scale as a twelve-bit binary value;

After removing the binary value of the twelve bits, four bits are obtained to obtain the binary value of eight bits;

The eight-bit binary value is converted into a decimal value as the third display gray scale.

Optionally, the determining the gamma voltage of the target pixel according to the compensation result includes:

When acquiring the first display grayscale as 255 grayscale, converting to the target grayscale corresponding to the third display grayscale;

Taking the gamma voltage corresponding to the first display grayscale as the 255 grayscale as the gamma voltage corresponding to the target grayscale;

Using the conversion relationship of the gamma voltages of all levels of gray levels to calculate the gamma voltages of all levels of gray levels corresponding to the third display gray level;

The number of gray levels when the display gray level of the target pixel is converted into the third display gray level is determined according to the overdrive compensation result, and is determined according to the calculated gamma voltages of all gray levels corresponding to the third display gray level Gamma voltage of the target pixel.

In a second aspect, an embodiment of the present invention provides a compensation device for a display panel, including:

The grayscale conversion module is used to obtain the first display grayscale of the target pixel included in the input signal, and convert the first display grayscale to the second display grayscale according to the conversion relationship between the first display grayscale and the second display grayscale displaying grayscales, wherein the number of grayscales of the grayscale format corresponding to the second display grayscale is greater than the number of grayscales of the grayscale format corresponding to the first display grayscale;

A grayscale conversion module, configured to convert the second display grayscale into a third display grayscale through hexadecimal conversion and byte reduction, where the number of grayscales in the grayscale format corresponding to the third display grayscale is equal to the the number of gray levels in a gray level format corresponding to the first display gray level, and the third display gray level is lower than the first display gray level;

The compensation module is configured to perform overdrive compensation on the target pixel based on the third display gray level to determine the gamma voltage of the target pixel.

Optionally, also include:

A grayscale number determination module, configured to determine a first grayscale format according to the grayscale number of the grayscale format corresponding to the first display grayscale, wherein the grayscale number of the first grayscale format is greater than the first grayscale format Display the number of gray levels in the gray level format corresponding to the gray level;

a scale-cutting module, configured to keep the number of gray-scales unchanged, and reduce the output range of the first gray-scale format to obtain a second gray-scale format;

A conversion relationship determination module, configured to use the conversion relationship between the grayscale format corresponding to the first display grayscale and the second grayscale format as the conversion relationship between the first display grayscale and the second display grayscale .

Optionally, the number of grayscales of the grayscale format corresponding to the first display grayscale is 256 grayscales, the first grayscale format is an accurate color processing ACC format, and the grayscale of the first grayscale format is The number is 1024 grayscale.

Optionally, the grayscale conversion module includes:

a first conversion submodule for representing the second display gray scale as a twelve-bit binary value;

Removing the submodule, for removing the back four bits of the twelve-bit binary value to obtain an eight-bit binary value;

The second conversion submodule is configured to convert the eight-bit binary value into a decimal value as the third display gray scale.

Optionally, the compensation module includes:

A grayscale acquisition sub-module, configured to acquire the target grayscale corresponding to the third display grayscale when the first display grayscale is 255 grayscale;

a voltage determination submodule, configured to use the gamma voltage corresponding to the first display grayscale as the 255 grayscale as the gamma voltage corresponding to the target grayscale;

a voltage calculation sub-module, configured to calculate the gamma voltages of all levels of gray levels corresponding to the third display gray level by using the conversion relationship of the gamma voltages of all levels of gray levels;

The compensation sub-module is used to determine the number of gray levels when the display gray level of the target pixel is converted into the third display gray level according to the overdrive compensation result, and according to the calculated third display gray level corresponding to each level of gray level The gamma voltage of the order determines the gamma voltage of the target pixel.

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 this embodiment of the present invention, the first display gray level is converted into a second display gray level, and then the second display gray level is converted into a third display gray level through binary conversion and byte reduction. In this way, the third display gray level The grayscale voltage value of the displayed grayscale is equal to the grayscale voltage value of the first displayed grayscale, since the total grayscale level of the first displayed grayscale is equal to the total grayscale level of the third displayed grayscale, and the third displayed grayscale It is lower than the first display gray level, so the actual gamma voltage can be increased by overvoltage driving the third display gray level, and the charging rate of the target pixel when displaying a high gray level can be improved, which helps to improve the display effect.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

FIG. 1 is a flowchart of a compensation method for a display panel provided by an embodiment of the present invention;

2 is a schematic diagram of a display state of a display panel according to an embodiment of the present invention;

3 is a schematic diagram of waveforms of scan signals and pixel gamma voltages in an embodiment of the present invention;

4 is a schematic diagram of a pixel gamma voltage in 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;

6 is another flowchart of a compensation method for a display panel provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a compensation device for a display panel according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be understood that, in the related art, each pixel of the display panel can be charged by overdriving compensation (OverDrivering) to improve the charging rate of the pixel. Overdriving compensation means that the actual gamma voltage is greater than the gamma voltage corresponding to the display gray scale.

Taking the grayscale format of the image as an example of 0 to 255 grayscale, the current grayscale of a pixel is 100 grayscale, and the next displayed grayscale is 150 grayscale, then the actual loaded gamma voltage may be 155 grayscale The corresponding gamma voltage can improve the charging rate of the pixel and shorten the charging time.

However, when displaying high gray levels, for example, if the gray level to be displayed by a certain pixel is 255 gray level, since a higher gray level voltage cannot be provided for the pixel, overdrive compensation cannot be performed for the pixel, which may cause the pixel The charging rate is insufficient, which may affect the display effect. That is to say, the technical solutions in the related art cannot effectively compensate the pixels with high display gray scales.

Embodiments of the present invention provide a compensation method for a display panel.

As shown in FIG. 1, in one embodiment, the compensation method of the display panel includes the following steps:

Step 101: Acquire a first display gray level of a target pixel included in an input signal, and convert the first display gray level into a second display gray level according to the conversion relationship between the first display gray level and the second display gray level.

In this embodiment, the number of grayscales of the grayscale format corresponding to the second display grayscale is greater than the number of grayscales of the grayscale format corresponding to the first display grayscale. Here, the number of grayscales refers to the total number of grayscales included in one grayscale format.

For example, a common grayscale format has a number of grayscales of 256, including a total of 256 grayscale levels from 0 to 255; for another example, in the related art, the grayscale number of a certain grayscale format is 4096, and the grayscale number of another grayscale format is 4096. The number of grayscales in the grayscale format is 16384, etc., and there is a certain conversion relationship between different grayscale formats.

In this embodiment, the first display gray scale is first converted into a gray scale format with a higher gray scale number, and the specific conversion method can refer to the related art, which is not further limited and described here.

In an optional specific implementation manner, the grayscale format of the first display grayscale is the commonly used 256 grayscale, and the grayscale format of the second display grayscale is ACC (Accurate Color Capture, accurate color processing), that is, the second grayscale format is ACC (Accurate Color Capture, accurate color processing). The number of gray levels displayed is 1024, including 0 to 1023, a total of 1024 gray levels, and the output range is 0 to 4092. Obviously, in actual implementation, the selected grayscale format is not limited to this.

Step 102 : Convert the second display gray scale to a third display gray scale through base conversion and byte reduction.

The display gray scale of the pixels can be converted into different expressions, such as binary expressions.

For example, 255 grayscale converted to binary is 11111111, and 1023 grayscale converted to binary is 1111111111.

After the base conversion is completed, the byte reduction process is further performed. It should be understood that after the byte reduction is performed, the number of gray levels of the third display gray level is equal to the number of gray levels of the first display gray level, that is, its gray level format is the same, the third display grayscale is lower than the first display grayscale due to the byte reduction process.

For example, in a specific implementation manner, the first display grayscale is 255 grayscale, and the corresponding second display grayscale is 1023 grayscale. After binary conversion and byte reduction, the obtained third display grayscale Below the first display grayscale, for example, it may be 245 grayscale.

Step 103: Perform overdrive compensation on the target pixel based on the third display gray level to determine the gamma voltage of the target pixel.

Since the obtained third display grayscale is lower than the first display grayscale, and its grayscale format is the same, even if the first display grayscale is 255 grayscale, the third display grayscale is not the maximum grayscale, for example, it may be 245 gray scales, in this way, the display panel can provide a higher gamma voltage to realize overdrive driving of the gray scale voltage required for the third display gray scale, so as to ensure that the charging rate meets the requirements.

In this embodiment of the present invention, the first display gray level is converted into a second display gray level, and then the second display gray level is converted into a third display gray level through binary conversion and byte reduction. In this way, the third display gray level The grayscale voltage value of the displayed grayscale is equal to the grayscale voltage value of the first displayed grayscale, since the total grayscale level of the first displayed grayscale is equal to the total grayscale level of the third displayed grayscale, and the third displayed grayscale It is lower than the first display gray level, so the actual gamma voltage can be increased by overvoltage driving the third display gray level, and the charging rate of the target pixel when displaying a high gray level can be improved, which helps to improve the display effect.

In an optional specific embodiment, before the above step 101, it further includes:

The first grayscale format is determined according to the grayscale number of the grayscale format corresponding to the first display grayscale, wherein the grayscale number of the first grayscale format is greater than the grayscale format corresponding to the first display grayscale The number of gray classes;

Keep the number of grayscales unchanged, and reduce the output range of the first grayscale format to obtain a second grayscale format;

The conversion relationship between the grayscale format corresponding to the first display grayscale and the second grayscale format is used as the conversion relationship between the first display grayscale and the second display grayscale.

The gray level number of the first display gray level is determined by the signal format input by the display panel, for example, the gray level corresponding to the above-mentioned 0 to 255 gray level is a gray level format of 256 levels.

The first grayscale format and the first grayscale format are used to determine the second display grayscale.

In this embodiment, the first target grayscale includes a total of 1024 grayscales from 0 to 1023 as an example for illustration. As shown in Table 1, the output range is from 0 to 4092.

Table 1: Grayscale output range corresponding to the first grayscale format

In this embodiment, the first gray-scale format is first cut to obtain a second gray-scale format,

Specifically, keep the number of gray levels unchanged, and then reduce the output range. For example, keep the number of gray levels unchanged from 0 to 1023, and then reduce the output range from 0 to 4092 to 0 to M, where M is less than 4092. A positive integer, the specific value of which can be selected according to the situation. As shown in Table 2, in this embodiment, M is 3568 as an example for illustration. In actual implementation, the value of M is not limited to this.

Table 2: Grayscale output range corresponding to the second grayscale format

In this way, the corresponding relationship between the first display grayscale and the second grayscale format is the corresponding relationship between the grayscale 0 to 255 and the output range of the second grayscale format from 0 to 3568. After the corresponding relationship is determined, the first display gray level can be converted into the second display gray level through the corresponding relationship. For example, in the case where the first display grayscale is 255 grayscale, the second display grayscale is converted to 3568.

Further, in an optional specific implementation manner, the above step 102 includes:

Representing the second display gray scale as a twelve-bit binary value;

After removing the binary value of the twelve bits, four bits are obtained to obtain the binary value of eight bits;

The eight-bit binary value is converted into a decimal value as the third display gray scale.

The above-mentioned first display gray level is 255 gray level, and the second display gray level obtained by conversion is 3568 as an example for illustration. As shown in FIG. 2 , FIG. 2 is a schematic diagram of the state of a display panel when the display grayscale of a local pixel is 255 grayscale.

As shown in Table 3, the second display grayscale is expressed as a binary value of 110111110000, and the eight-bit binary value obtained by removing the last four bits is 11011111, which is converted to a decimal value of 223, that is, the converted The binary value is 223 grayscales.

Table 3: Schematic representation of byte reduction

bit 12 11 10 9 8 7 6 5 4 3 2 1 Numerical value 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:

When acquiring the first display grayscale as 255 grayscale, converting to the target grayscale corresponding to the third display grayscale;

Taking the gamma voltage corresponding to the first display grayscale as the 255 grayscale as the gamma voltage corresponding to the target grayscale;

Using the conversion relationship of the gamma voltages of all levels of gray levels to calculate the gamma voltages of all levels of gray levels corresponding to the third display gray level;

The number of gray levels when the display gray level of the target pixel is converted into the third display gray level is determined according to the overdrive compensation result, and is determined according to the calculated gamma voltages of all gray levels corresponding to the third display gray level Gamma voltage of the target pixel.

Taking the first display grayscale as 255 grayscale and the third display grayscale corresponding to the conversion as 223 grayscale as an example in the above-mentioned specific embodiment, the gamma voltages are the same, that is, the third display grayscale is 223 grayscale. In the case of 255 gray levels, its gamma voltage is equal to the gamma voltage of the first display gray level of 255 gray levels.

Further, the gamma voltages of the gray levels corresponding to the third display gray level are calculated according to the gamma voltage value. After the gamma voltage of one gray level is determined, the gamma voltages of other gray levels can be calculated according to the corresponding relationship. Voltage, for example, the gamma voltages of other gray scales can be obtained according to the gamma 2.2 curve.

In this way, when the 255 grayscale in the first display grayscale is converted to the third display grayscale, it is 223 grayscale, so the converted third display grayscale can be further overdrive compensation, so as to further determine the required Gamma voltage to achieve overdrive for the target pixel to ensure that its charging rate meets the demand,

Please refer to FIG. 3 and FIG. 4. In FIG. 3, the curve with a lower pixel voltage value is a waveform diagram of the pixel gamma voltage without overdrive compensation, and the curve with a higher pixel voltage value is a waveform obtained by using the technical solution of this embodiment. The pixel gamma voltage waveform diagram after drive compensation, the difference between the two maximum values is the overdrive compensation value Vod.

In FIG. 4 , the left side is the corresponding relationship between the display gray level and the gamma voltage without overdrive compensation, and the right side is the display gray level and the gamma voltage after the overdrive compensation is performed using the technical solution of this embodiment. Correspondence between. The grayscale voltage corresponding to the 0 grayscale is the same, and the compensated 255 grayscale voltage is the corresponding gamma voltage of V1+Vod (positive polarity frame) or V18-Vod (negative polarity frame). Among them, V1 (positive polarity frame) or V18 (negative polarity frame) is the gamma voltage of the original 255 grayscale.

Please continue to refer to FIG. 3 and FIG. 4. It can be understood that, in the related art, if the display grayscale of a pixel is 255 grayscale, then the corresponding ACC result is 4092, and the result output by the frame rate control module is 255. The result of drive compensation is 255, and the final output of the control chip is 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 grayscale of a pixel is 255 grayscale, then the corresponding ACC result is 3568, the result outputted by the frame rate control module is 223, the result of overdrive compensation is 255, and the control The final output of the chip is 255 gray scales, and the corresponding gamma voltage is V1+Vod (positive polarity frame) or V18-Vod (negative polarity frame).

Please refer to Table 4 and Table 5 at the same time. In Table 4 and Table 5, the first row is the grayscale of the current row, and the left column is the next row of grayscales. The value determined according to the grayscale of each current row and the next row of grayscales is Overdrive voltage for the next row.

As shown in Table 4, in the related art, if the grayscale of the current row is 0 grayscale and the grayscale of the next row is 255 grayscale, the overdrive voltage that can be provided can only be the driving voltage corresponding to the 255 grayscale. Overdrive is not actually implemented, which may result in insufficient charging rate.

As shown in Table 5, after applying the technical solution of this embodiment, if the display grayscale of the current row is 0 grayscale, the display grayscale of the next row is 223 grayscale (the index value in the table is actually 224 grayscale) , then the actual overdrive voltage is the drive voltage corresponding to 255 grayscales, which is the above V1+Vod (positive polarity frame) or V18-Vod (negative polarity frame), which can realize overdrive to ensure the charging rate.

Table 4: Overdrive Drive 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 example

The above-mentioned overdrive compensation value Vod is the compensation amount determined according to the performance parameters of the display panel. If the charging rate of the display panel is higher, the overdrive compensation value will be smaller. The larger the overdrive compensation value is, the specific value can be measured by experiment or set according to experience.

For example, for a large-size, high-resolution or high-refresh-frequency display panel, the overdrive compensation value is set relatively large. On the contrary, for a small-size, low-resolution or low refresh rate display panel, the overdrive compensation value is set relatively large. The setting is relatively small.

As shown in FIG. 5 and FIG. 6 , the technical solution of this embodiment can be summarized as follows: during implementation, after the control module (TCON) obtains the input signal, that is, after obtaining the above-mentioned first display gray scale, the precise color processing module first performs processing The above-mentioned second display gray scale is obtained, and then the frame rate control module performs processing to obtain the above-mentioned third display gray scale.

Further, it is necessary to determine whether it is necessary to perform overdrive compensation on the target pixel. It should be understood that, in this embodiment, the technical solution of this embodiment can be applied to pixels with different display gray levels, but mainly for pixels with high display gray levels. , for example, in the 0 to 255 grayscale format, the pixels whose grayscale is 255 are displayed.

In a specific implementation manner, the overdrive compensation is mainly performed for pixels whose display gray level is greater than a preset gray level threshold.

In this embodiment, the setting of the preset gray-scale threshold should be set according to the actual situation of the display panel, mainly considering the possible impact of factors such as size and refresh frequency on the charging rate. If the charging rate of the display panel is higher, Then the preset grayscale threshold should be set 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, it may be necessary to set the The grayscale threshold is set to 250 grayscale.

If overdrive compensation needs to be performed on a pixel, the pixel needs to be overdriven based on the third display grayscale to obtain the required gamma voltage; if overdrive compensation is not required, the third display grayscale can be directly displayed Determine its gamma voltage.

Further, after the data signal is further decoded and digital-to-analog converted by the data module, the data is outputted to output the corresponding gamma voltage to the display panel. This process can refer to the related art and will not be repeated here.

Embodiments of the present invention further provide a compensation device 700 for a display panel.

As shown in FIG. 7 , the compensation device 700 of the display panel includes:

The grayscale conversion module 701 is used to obtain the first display grayscale of the target pixel included in the input signal, and convert the first display grayscale to the first display grayscale according to the conversion relationship between the first display grayscale and the second display grayscale. 2. Display grayscale, wherein the number of grayscales of the grayscale format corresponding to the second display grayscale is greater than the number of grayscales of the grayscale format corresponding to the first display grayscale;

The grayscale conversion module 702 is configured to convert the second display grayscale into a third display grayscale through hexadecimal conversion and byte reduction, and the number of grayscales in the grayscale format corresponding to the third display grayscale is equal to the specified number of grayscales. the number of gray levels in a gray level format corresponding to the first display gray level, and the third display gray level is lower than the first display gray level;

The compensation module 703 is used for overdrive compensation to perform overdrive compensation on the target pixel based on the third display gray level, so as to determine the gamma voltage of the target pixel.

Optionally, also include:

A grayscale number determination module, configured to determine a first grayscale format according to the grayscale number of the grayscale format corresponding to the first display grayscale, wherein the grayscale number of the first grayscale format is greater than the first grayscale format Display the number of gray levels in the gray level format corresponding to the gray level;

a scale-cutting module, configured to keep the number of gray-scales unchanged, and reduce the output range of the first gray-scale format to obtain a second gray-scale format;

A conversion relationship determination module, configured to use the conversion relationship between the grayscale format corresponding to the first display grayscale and the second grayscale format as the conversion relationship between the first display grayscale and the second display grayscale .

Optionally, the number of grayscales of the grayscale format corresponding to the first display grayscale is 256 grayscales, the first grayscale format is an accurate color processing ACC format, and the grayscale of the first grayscale format is The number is 1024 grayscale.

Optionally, the grayscale conversion module 702 includes:

a first conversion submodule for representing the second display gray scale as a twelve-bit binary value;

Removing the submodule, for removing the back four bits of the twelve-bit binary value to obtain an eight-bit binary value;

The second conversion submodule is configured to convert the eight-bit binary value into a decimal value as the third display gray scale.

Optionally, the compensation module 703 includes:

A grayscale acquisition sub-module, configured to acquire the target grayscale corresponding to the third display grayscale when the first display grayscale is 255 grayscale;

a voltage determination submodule, configured to use the gamma voltage corresponding to the first display grayscale as the 255 grayscale as the gamma voltage corresponding to the target grayscale;

a voltage calculation sub-module, configured to calculate the gamma voltages of all levels of gray levels corresponding to the third display gray level by using the conversion relationship of the gamma voltages of all levels of gray levels;

The compensation sub-module is used to determine the number of gray levels when the display gray level of the target pixel is converted into the third display gray level according to the overdrive compensation result, and according to the calculated third display gray level corresponding to each level of gray level The gamma voltage of the order determines the gamma voltage of the target pixel.

The compensation device 700 for a display panel and the display device provided by the embodiments of the present invention can implement the various processes in the foregoing method embodiments, which are not repeated here to avoid repetition.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should 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.

Images