WO2020191615A1

WO2020191615A1 - Display driving method and display device

Info

Publication number: WO2020191615A1
Application number: PCT/CN2019/079681
Authority: WO
Inventors: 郭星灵; 张肖; 周锦杰
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2020-10-01
Also published as: CN113316812A

Abstract

Disclosed is a display driving method, comprising the steps: obtaining multiple gray-scale data corresponding to all pixels in a display panel in one frame of picture, and respectively calculating average gray-scale values of all the gray-scale data corresponding to color pixels; respectively performing compensation adjustment on each gray-scale data in the color pixels according to the average gray-scale values so as to obtain adjusted gray-scale data corresponding to the all pixels; outputting the adjusted gray-scale data to display the one frame of picture. The present invention further provides a display device that can execute the display driving method.

Description

Display driving method and display device

Technical field

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

Background technique

An existing Organic Light-Emitting Diode (OLED) display device image display uses image data data combined with a light-emitting drive voltage (Electroluminescent Voltage Device, ELVDD) to drive the OLEDs in a plurality of pixel units to emit light in a current drive manner. Generally, ELVDD is provided by a power driver (Power IC) that is located outside the display area. However, since the power supply driver is only arranged on one side of the display area, the distance between each pixel unit in the display area and the power supply driver is not exactly the same, resulting in that the light-emitting driving voltage ELVDD provided to each pixel unit is not exactly the same. The brightness varies with the distance from the power driver, resulting in uneven brightness in the display area, resulting in poor image effects displayed by the display panel and affecting the user's visual experience.

Summary of the invention

To solve the above-mentioned problems, embodiments of the present invention disclose a display device with better display effect and a display driving method thereof.

An embodiment of the present invention discloses a display driving method, which includes the following steps:

Acquire multiple grayscale data corresponding to all pixels in the display panel in one frame of picture, and calculate the average grayscale value of all grayscale data corresponding to each color pixel;

Performing compensation adjustment on each gray-scale data in each color pixel according to the average gray-scale values to obtain adjusted gray-scale data corresponding to all the pixels;

Outputting the adjusted grayscale data to display the one frame of picture.

One embodiment of the present invention discloses a display device including a display panel and a display driver, the display driver is used to provide at least one frame of picture data to the display panel to perform image display, and the display driver includes at least a dynamic brightness compensation unit , The brightness dynamic compensation unit is used to execute the aforementioned display driving method.

The display driving method provided by the embodiment of the invention adjusts the image grayscale data according to the compensation factor, and overcomes the occurrence of the brightness of each grayscale of the screen and the ideal gamma brightness when the screen is displayed normally after adjusting the gamma in the early stage of the display panel. The phenomenon of drift enables the brightness of each gray scale of the display panel to display ideal gamma brightness that conforms to the optical characteristics of the human eye during normal display, ensuring uniform gray scale brightness transition and improving the optical quality of the display panel.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.

FIG. 1 is a functional block diagram of a display device in an embodiment of the invention;

FIG. 2 is a schematic diagram of the circuit structure of the pixel unit shown in FIG. 1;

Fig. 3 is a functional block diagram of the brightness dynamic compensation unit shown in Fig. 1;

FIG. 4 is a schematic diagram of the flow of dynamic brightness compensation performed by the brightness dynamic compensation unit shown in FIG. 1;

FIG. 5 is a schematic diagram of gray-scale voltage divisions corresponding to a single color pixel unit in a frame of picture;

FIG. 6 is a coordinate relationship diagram of each grayscale data and compensation factor in a frame of image;

FIG. 7 is a coordinate relationship diagram of gray-scale voltage information and brightness in image data;

Fig. 8 is a schematic flow chart of the steps of presetting and setting the compensation factor shown in Fig. 4;

Figure 9 shows the correspondence between grayscale data and brightness values;

Figure 10 is a graph of the relationship between brightness and drive current;

Figure 11 is a graph of the relationship between drive current and drive voltage;

FIG. 12 is a schematic flowchart of the steps of obtaining adjustment grayscale data in a modified embodiment of the present invention;

FIG. 13 is a coordinate diagram of the relationship between the gray scale data and the gamma register value and the adjusted gray scale data in the process of obtaining the adjusted gray scale data.

detailed description

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

Please refer to FIG. 1, which is a functional block diagram of a display device in an embodiment of the present invention. As shown in FIG. 1, the display device 100 includes a display panel 10 and a data driver 20. The data driver 20 is electrically connected to the display panel 10 for receiving externally provided image data to be displayed to the display panel 10.

Specifically, the display area of the display panel 10 is provided with a plurality of pixel units P arranged in a matrix. In this embodiment, the display panel 10 is an OLED display panel, and the specific circuit structure of the pixel unit P is shown in FIG. 2. The pixel unit P includes a driving transistor T and a light emitting unit LU. The gate of the driving transistor is used to receive image data. The image data in this embodiment is RGB Data, which can also be characterized by the gate driving voltage Vg or Vdata, and the source of the driving transistor is used to receive the driving voltage (Electroluminescent Voltage Device) ELVDD The drain of the driving transistor T is connected to the anode of the light-emitting unit LU, and the cathode of the light-emitting unit LU is electrically connected to the ground reference voltage ELVSS. The driving transistor T controls the current flowing through the light-emitting unit LU through the cooperation of the image data and the driving voltage ELVDD, thereby accurately controlling the light-emitting brightness of the light-emitting unit LU.

In order to realize color display, the pixel units P arranged in a matrix include a first color pixel unit (not labeled), a second color pixel unit (not labeled), and a third color pixel unit (not labeled), for example , The resolution of the display panel 10 is 2560*1440, and then there are 2560*1440 (3,686,400) first color pixel units; 2560*1440 second color pixel units; 2560*1440 third color pixel units.

Among them, the first color pixel unit, the second color pixel unit, and the third color pixel unit can be mixed into a fourth color after they emit light according to the image data data and the driving voltage ELVDD.

Please continue to refer to FIG. 1, the data driver 20 includes a data receiving unit 21, a data uniformity adjustment unit 22, a brightness dynamic compensation unit 23, a data latch unit 24, a gamma correction and data conversion unit 25, and a data buffer, which are sequentially and electrically connected. With output unit 26.

Wherein, the data receiving unit 21 is configured to receive image data data of at least one frame of picture. In this example, the image data data of one frame of picture is one frame of picture including grayscale data corresponding to the first color pixel unit, the second color pixel unit, and the third color pixel unit. That is to say, the image data data includes gray-scale data corresponding to all first-color pixel units, gray-scale data corresponding to all second-color pixel units, and gray-scale data corresponding to all third-color pixel units. In other words, the image data data contains 2560*1440 grayscale data corresponding to the first color pixel unit, 2560*1440 grayscale data corresponding to the second color pixel unit, and 2560*1440 grayscale data corresponding to the second color pixel unit. Grayscale data of the unit.

In this embodiment, the first color is red, the second color is green, and the third color is blue. By adjusting the content and intensity of the light emitted by the first color, the second color, and the third color to perform the image display, the light of the white fourth color can be obtained by mixing.

The data uniformity adjustment unit 22 is configured to perform uniformization processing (Dc-Mura processing) on the image data, thereby preventing abnormal phenomena such as flickering of the image data when the display panel 10 performs image display.

The brightness dynamic compensation unit 23 is configured to perform brightness compensation for the image data data. In this embodiment, the need to perform brightness compensation is because the driving voltage ELVDD provided by the driving power chip PIC to each pixel unit P in the display panel 10 causes a voltage drop due to the presence of resistance during the transmission process, and when the image data Data is matched The driving current generated when the driving voltage ELVDD drives the pixel unit P decreases, which in turn causes the brightness of the pixel unit P to decrease.

The data latch unit 24 is used to latch the image data data for which brightness compensation has been performed to ensure the consistency of data transmission.

The gamma correction and data conversion unit 25 is used for performing gamma correction and digital-to-analog conversion on the image data data, that is, converting the image data of a digital signal into an analog voltage signal.

The data buffer and output unit 26 is used to buffer the image data data converted into an analog voltage signal and output to each pixel unit in the display panel 10.

Please refer to FIG. 3, which is a functional block diagram of the brightness dynamic compensation unit 23 shown in FIG.

As shown in FIG. 3, the brightness dynamic compensation unit 23 includes a temporary storage unit 231, an image data statistics unit 232, a compensation calculation unit 233, and a compensation factor storage unit 234.

The temporary storage unit 231 is used to temporarily store image data for one frame of screen.

The image data statistics unit 232 is configured to perform statistical analysis on the image data of one frame of picture, specifically, to count the grayscale data of each single color pixel in the image data data of one frame of picture, that is, to count the first color separately The gray scale data of the pixel unit, the gray scale data of the second color pixel unit, and the gray scale data of the third color pixel unit.

Preferably, the image data statistical unit 232 also calculates the corresponding average gray scale value for the statistically calculated image data of each color pixel. For example, the first average grayscale value corresponding to the first color pixel unit, the second average grayscale value corresponding to the second color pixel unit, and the third average grayscale value corresponding to the third color pixel unit are calculated.

The compensation factor storage unit 234 is configured to preset and store the compensation factor of each grayscale data.

The compensation calculation unit 233 performs dynamic brightness compensation on the image data data according to the compensation factor, and outputs the image data data after the dynamic brightness compensation to the data latch unit 24.

Please refer to FIG. 4, which is a schematic flowchart of the dynamic brightness compensation performed by the brightness dynamic compensation unit 23 shown in FIG. 1 on the image data data. As shown in Figure 4:

Step 401: Obtain multiple grayscale data corresponding to all pixel units in a frame of picture, and calculate an average grayscale value of all grayscale data corresponding to each color pixel unit.

Specifically, as shown in FIG. 5, it is a schematic diagram of the division of grayscale data corresponding to one color pixel unit in a frame of picture, wherein the average grayscale value Gaj of the grayscale data corresponding to the color pixel unit. Wherein, j is a natural number, and j≦4, and this step 401 can be performed by the image data statistics unit 232.

For example, the average gray scale value corresponding to the first color display unit is: the sum of the gray scale data corresponding to all the first color pixel units ÷ 3,686,400 (2560*1440); the average gray scale corresponding to the second color display unit The value is: the sum of the grayscale data corresponding to all the second color pixel units ÷ 3,686,400 (2560*1440); the average grayscale value corresponding to the first color display unit is: the sum of the grayscale data corresponding to all the third color pixel units And ÷ 3,686,400 (2560*1440).

Step 402: Perform compensation adjustment on each grayscale data in each color pixel according to the average grayscale values to obtain adjusted grayscale data corresponding to all pixels in the one frame of picture.

Step 403: Output the plurality of adjusted grayscale data to the display panel 10 to display the one frame of picture.

Specifically, the grayscale data of the corresponding color pixel unit is adjusted according to the average grayscale value corresponding to each color pixel unit, so as to obtain the adjusted grayscale data of each color pixel unit, that is, to obtain dynamic brightness adjustment The image data data' of each pixel in the next frame of the picture.

In an example, the step of respectively performing compensation adjustment on each grayscale data in each color pixel according to the respective compensation factors to obtain the adjusted grayscale data corresponding to all pixels in the one frame includes:

For any one of the color pixel units, the compensation factor corresponding to each gray level data is executed according to the difference between the average gray level value Gaj corresponding to the color pixel unit and each gray level data in the color pixel unit Adjust to obtain an adjustment compensation factor corresponding to each gray-scale data, and then perform adjustment for each gray-scale data according to the adjustment and compensation factor to obtain adjusted gray-scale data. Of course, the adjustment compensation factor is also stored in the compensation factor storage unit 234.

Wherein, the compensation and adjustment of each gray-scale data in each color pixel according to the average gray-scale value mainly includes the respective offsets according to the offset of each gray-scale data in each color pixel with respect to the corresponding average gray-scale value. Make compensation adjustments. In other words, first determine the offset of each grayscale data in each color pixel relative to the corresponding average grayscale value, and correct the compensation factor of each grayscale data according to the offset, and then according to the corrected The compensation factor is adjusted for each grayscale data.

The correction of the compensation factor of each grayscale data according to the offset may include: multiplying the offset by the compensation factor of each grayscale data to obtain an adjusted compensation value.

The adjustment of each gray scale data according to the corrected compensation factor may include: adding the adjusted compensation value to the corresponding gray scale data to obtain the adjusted gray scale data.

Specifically, the step of obtaining and adjusting grayscale data includes:

Step 4031: Obtain the compensation factor Ki of any grayscale data of any color pixel, where i is a natural number and 1≤i≤255. For example, each gray scale data of 0-255 gray scales in each color pixel unit and its corresponding compensation factor are stored in a table form in advance.

For the first color pixel unit, the compensation factor of each gray level data in all gray level data corresponding to the first color pixel unit is obtained by querying according to the aforementioned table.

Preferably, the compensation factor Ki of any grayscale data of any color pixel includes:

The gray scale data of the first color pixel corresponds to the compensation factor of each gray scale in the 0-255 gray scale, the gray scale data of the second color pixel corresponds to the compensation factor of each gray scale in the 0-255 gray scale, The compensation factor of each gray scale in the gray scale of 0-255 corresponding to the gray scale data of the third color pixel.

Step 4032: Obtain the difference between any grayscale data and the average grayscale value corresponding to any one color pixel.

Step 4033: Multiply the difference value by the compensation factor Kaj corresponding to the grayscale data to obtain an adjustment compensation factor corresponding to any one of the grayscale data.

Step 4034: Add the any gray-scale data and the adjustment compensation factor corresponding to the any gray-scale data to obtain the adjusted gray-scale data.

Preferably, when the gray scale data corresponding to each pixel is greater than the average gray scale value, the adjustment compensation factor is correspondingly obtained as a negative number, and when the gray scale data corresponding to each pixel is less than the average gray scale value, For the order value, the corresponding adjustment compensation factor is obtained as a positive number. This effectively prevents the image data larger than the average grayscale value from being overcompensated, and prevents the image data smaller than the average grayscale value from being overcompensated.

Specifically, for example, as shown in FIG. 6, it is a coordinate relationship diagram of each grayscale data and compensation factor in a frame of image. For the grayscale data corresponding to the first color pixel unit, the average grayscale value is 128. The compensation factor corresponding to the average gray scale is K ₁₂₈ , then, for the gray scale data corresponding to the 255 gray scale, the corresponding compensation factor is K ₂₅₅ , and the difference between the 255 gray scale and the average gray scale value 128 is 127, then The adjustment compensation factor corresponding to 255 gray scale is -127*K ₂₅₅ ; for the gray scale data corresponding to 36 gray scale, the corresponding compensation factor is K ₃₆ , and the difference between it and the average gray scale value 128 is 92, then The adjustment compensation factor corresponding to 36 gray levels is 92*K ₃₆ .

Preferably, the adjustment and compensation factors of all grayscale data corresponding to each color pixel unit are obtained, and the multiple adjustment and compensation factors are fitted into corresponding curves according to the relationship of grayscale data from small to large.

Please refer to Figure 7, which is the coordinate relationship between the gray scale data Gray and the brightness Lv in the image data. As shown in Figure 7, after adjustment, the actual brightness curve corresponding to the input gray scale data is adjusted to the ideal brightness curve. Thus, the image data corresponding to one frame of the image in the display area has uniform brightness when displayed. Step 403 can be performed by the compensation calculation unit 233.

Preferably, this embodiment further includes the step of pre-calculating and storing the compensation factor of each grayscale data.

Specifically, please refer to FIG. 8, which is a schematic flowchart of the steps of pre-setting and setting the compensation factor shown in FIG. 4. As shown in Figure 8:

Step 801: Determine the brightness difference between the actual brightness and the ideal brightness of each gray scale of 0-255 gray scales in each color pixel under the preset gamma coefficient.

Specifically, according to the target brightness corresponding to the preset gamma coefficient, the brightness values Lv corresponding to the first color pixel, the second color pixel, and the third color pixel are adjusted in a single color, and the first color brightness adjustment values Lvr and the first color brightness adjustment value Lvr and the The second color brightness adjustment value Lvg and the third color brightness adjustment value Lvb. Wherein, the first color pixel and the third color pixel are displayed and mixed to obtain a fourth color, and the brightness adjustment value corresponding to the fourth color is Lvr+Lvg+Lvb.

In this example, the default gamma coefficient is Gamma2.2. That is, corresponding to Gamma2.2, separately adjust the grayscale data corresponding to the first color pixel, the second color pixel, and the third color pixel.

Then, the first brightness detection value Lvw when the fourth color corresponding to 0-255 gray levels is displayed is detected. Further, the fourth color is calculated according to the accumulation of weight coefficients of the first color pixel, the second color pixel, and the third color brightness values according to a preset ratio when the brightness of the fourth color is displayed. The first color pixel, the second color pixel, and the third color light respectively correspond to the first color pixel separation calculation value, the second color pixel separation calculation value, and the third color pixel separation calculation value.

Preferably, the preset ratio corresponding to the first color pixel, the second color pixel, and the third color brightness value is 0.3:0.6:0.1.

Finally, the difference between the first color brightness adjustment value and the first color pixel separation calculation value is calculated to obtain the first color brightness difference value, and the second color brightness adjustment value and the second color pixel separation calculation value are calculated to obtain the first color brightness adjustment value. The second color brightness difference is, and the difference between the third color brightness adjustment value and the third color pixel separation calculation value is calculated to obtain the third color brightness difference. Wherein, in this embodiment, the brightness difference includes the first color brightness difference, the second color brightness difference, and the third color brightness difference.

Please refer to Figure 9, which is the corresponding relationship between the gray scale data Gray and the brightness value Lv. As shown in Figure 9, the debug value curve and the test value curve do not overlap, so it corresponds to each color pixel unit and each gray scale data There is a certain difference between the debug value and the test value.

Step 802: Calculate the driving current difference corresponding to the brightness difference.

Specifically, the first difference drive current, the second difference drive current, and the third difference drive current corresponding to the first color brightness difference, the second color brightness difference, and the third color brightness difference. Wherein, in this embodiment, the driving current difference includes a first difference driving current, a second difference driving current, and a third difference driving current.

Specifically, as shown in FIG. 10, it is a graph of the relationship between brightness and driving current. According to the relationship between brightness value and driving current, Lv=k*I, k is the relationship coefficient, and the brightness value is converted into driving current.

Step 803: Calculate the driving voltage difference corresponding to the driving current difference.

Specifically, the corresponding first difference drive voltage, second difference drive voltage, and third difference drive current are calculated according to the first difference drive current, the second difference drive current, and the third difference drive current. Value drive voltage. Wherein, in this embodiment, the driving voltage difference includes a first difference driving voltage, a second difference driving voltage, and a third difference driving voltage.

Specifically, as shown in FIG. 11, it is a graph of the relationship between the driving current Ids and the driving voltage Vgs, where the driving current Ids is the current flowing through the light-emitting unit OLED, and the driving voltage Vgs is the gate and source of the driving transistor. The voltage difference between.

Step 804: Calculate the compensation factor according to the driving voltage difference.

Specifically, the relationship coefficient K between the first differential drive voltage, the second differential drive voltage, and the third differential drive voltage and the gray scale of 0-255 is calculated, and the relationship coefficient K is used as the Compensation factor.

Please refer to FIG. 12, which is a schematic flow diagram of the step of obtaining and adjusting grayscale data in a modified embodiment of the present invention. As shown in FIG. 12, specifically, each of the average grayscale values corresponds to The step of performing compensation adjustment for each grayscale data in each color pixel includes: step 1201, obtaining a compensation voltage Va corresponding to an average grayscale value of any color pixel.

Specifically, the compensation voltage Va of each gray scale in the 0-255 gray scale will be preset and saved, for example, in the form of a table, the compensation voltage Va corresponding to each gray scale in the 0-255 gray scale corresponding to each color pixel unit The voltage Va is saved. In this embodiment, the compensation voltage is stored in the compensation factor storage unit 234. Then, each average gray scale value can also be queried from the table to obtain the corresponding compensation voltage Vaj.

Step 1202: Calculate the compensation gamma register value Kt corresponding to the compensation voltage Va.

Step 1203: Obtain the first gamma register value of each gray level of 0-255 gray levels corresponding to the preset gamma coefficient.

Among them, the gamma register of each gray scale in the 0-255 gray scale can be preset according to the gamma voltage that needs to be output, that is, a gray scale corresponding to a first gamma register value for each gray scale is preset -Register value table or gray scale-register value curve.

Step 1204: Add the compensation gamma register value Kt and the first gamma register value of each gray scale of 0-255 gray scale to obtain the second corresponding to each gray scale of 0-255 gray scale. Gamma register value.

Specifically, the first gamma register value corresponding to each gray level of 0-255 gray levels in the gray level-register value table and the compensation gamma register value are combined to obtain a new gray level-register value table Or the gray scale-register value curve, and then obtain the second gamma register value corresponding to each gray scale.

Step 1205: Adjust the grayscale data in any one color pixel according to the corresponding relationship between the second gamma register value and the grayscale data, and obtain the adjusted grayscale data. That is, according to the correction register value, the gamma register value with the greatest similarity is searched, and the gray level corresponding to the gamma register value with the greatest similarity is used as the adjusted gray level data.

Specifically, adjusting the grayscale data in any one color pixel according to the corresponding relationship between the second gamma register value and the grayscale data and obtaining the adjusted grayscale data further includes:

Reading the second gamma register value corresponding to each grayscale data;

Find the first gamma register value with the smallest difference from the second gamma register value, and use the grayscale data corresponding to the first gamma register value as the adjusted grayscale data corresponding to the second gamma register value , And update the adjusted gray scale data and the second gamma register value to the gray scale data and register value mapping table.

The calculating the compensation gamma register value Kt corresponding to the compensation voltage includes:

Calculate the difference VGMAH-VGMAL between the maximum gamma voltage value VGMAH and the minimum gamma voltage value VGMAL under the preset gamma coefficient.

The ratio of the difference value to the preset length value is calculated to obtain the step length information Vstep=(VGMAH-VGMAL)/1023 of the gamma voltage corresponding to the single color pixel. The ratio of the compensation voltage to the step information is calculated to obtain the adjustment compensation register value Kt, that is, Kt=Va/Vstep.

Specifically, please refer to FIG. 13, which is a graph of the relationship between the grayscale data and the gamma register value and the adjusted grayscale data in the process of obtaining the adjusted and compensated grayscale data. Before adjusting the gamma register value, 128 grayscale The corresponding register value is 400; when the compensation register value is 15, the correction gamma register value corresponding to 128 gray scales is 415; then, the gamma register value adjacent to the correction gamma register value 415 with the smallest difference is 420, The gamma register value 420 corresponds to 129 gray levels. Therefore, the 128 gray levels in the image data are adjusted to 129 gray levels and the 129 gray levels are used as the adjusted gray level data.

The embodiment of the present invention provides a display device and a display driving method thereof, which dynamically adjusts brightness according to grayscale data, effectively ensuring the accuracy of picture transmission, and also ensuring the consistency of the voltage drop generated by the external circuit of the display panel 10 when different pictures are transmitted. Since the driving voltage has the same voltage drop (IR drop) in each gray scale, it ensures that the driving voltage of the organic light-emitting end of the display panel is consistent, that is, the source voltage (Vs) is consistent, thereby ensuring the accurate display of the monochrome image and improving The display effect. In addition, since the consistency of the driving voltage is ensured, when the Gamma debugging operation is performed on the display panel, the voltage drop will not change and the screen display will not be deviated.

The above are the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered This is the protection scope of the present invention.

Claims

A display driving method is characterized by comprising the steps:

Acquire multiple grayscale data corresponding to all pixels in the display panel in one frame of picture, and calculate the average grayscale value of all grayscale data corresponding to each color pixel;

Performing compensation adjustment on each gray-scale data in each color pixel according to the average gray-scale values to obtain adjusted gray-scale data corresponding to all the pixels;

Outputting the adjusted grayscale data to display the one frame of picture.
The display driving method according to claim 1, wherein the compensation adjustment is performed on each gray scale data in each color pixel according to the average gray scale value, comprising: according to each gray scale data in each color pixel Compensation and adjustment are performed respectively relative to the offset of the corresponding average gray scale value.
The display driving method according to claim 2, wherein the compensation adjustment is performed according to the offset of each gray scale data in each color pixel relative to the corresponding average gray scale value, comprising:

Determine the offset of each grayscale data in each color pixel relative to the corresponding average grayscale value;

Correct the compensation factor of each grayscale data according to the offset;

Adjust each gray scale data according to the corrected compensation factor.
The display driving method according to claim 3, wherein the correction of the compensation factor of each gray scale data according to the offset includes:

The offset is multiplied by the compensation factor of each grayscale data to obtain the adjusted compensation value.
The display driving method according to claim 4, wherein the adjustment of each grayscale data according to the corrected compensation factor comprises:

The adjusted compensation value is added to the corresponding gray-scale data to obtain the adjusted gray-scale data.
The display driving method according to claim 1, wherein the compensation adjustment for each gray-scale data in each color pixel according to the average gray-scale value comprises:

Obtain the compensation factor of any grayscale data of any color pixel;

Acquiring the difference between the grayscale data and the average grayscale value corresponding to the color pixel;

Multiply the difference by the compensation factor corresponding to the grayscale data to obtain the adjustment compensation factor corresponding to the grayscale data;

The grayscale data and the adjustment compensation factor are added to obtain the adjusted grayscale data.
The display driving method according to claim 6, wherein:

When the grayscale data is greater than the average grayscale value, the adjustment compensation factor correspondingly obtained is a negative number;

When the grayscale data is less than the average grayscale value, the adjustment compensation factor is correspondingly obtained as a positive number.
8. The display driving method according to claim 7, wherein:

The one frame of picture includes gray scale data of the first color pixel, gray scale data of the second color pixel, and gray scale data of the third color pixel;

The compensation factor of any grayscale data in the grayscale data corresponding to any one color pixel includes:

The first color pixel corresponds to a compensation factor of each gray scale of 0-255 gray scale;

The second color pixel corresponds to a compensation factor of each gray scale of 0-255 gray scale;

The third color pixel corresponds to a compensation factor of each gray scale of 0-255 gray scale.
8. The display driving method according to claim 8, wherein the display driving method further comprises the steps of:

The compensation factor of each of the 0-255 gray levels corresponding to the first color pixel, the second color pixel, and the third color pixel is calculated and stored in advance.
The display driving method according to claim 9, wherein calculating the compensation factor of any one of the gray-scale data corresponding to the pixel of any one color comprises:

Under the preset gamma coefficient, determine the brightness difference between the actual brightness of each gray scale in the 0-255 gray scale in each color pixel and the ideal brightness;

Calculating a driving current difference corresponding to the brightness difference;

Calculating the driving voltage difference corresponding to the driving current difference;

The compensation factor is calculated according to the driving voltage difference.
10. The display driving method according to claim 10, wherein the actual brightness and the ideal brightness of each gray scale of 0-255 gray scales in each color pixel are determined under the preset gamma coefficient The steps of the brightness difference also include:

According to the target brightness corresponding to the preset gamma coefficient, adjust the brightness values corresponding to the first color pixel, the second color pixel, and the third color pixel in a single color, and obtain the first color brightness debugging value and the second color brightness debugging respectively Value and the third color brightness debugging value;

Detect the first brightness detection value when the fourth color light corresponding to each gray level in the 0-255 gray level is displayed, and the light emitted by the first color pixel, the second color pixel, and the third color pixel are mixed into the first color pixel Four-color light;

According to the display brightness of the fourth color pixel as the accumulation of the weight coefficients of the first color pixel, the second color pixel, and the third color brightness value according to a preset ratio, the first color in the fourth color is calculated. A first color pixel separation calculation value, a second color pixel separation calculation value, and a third color pixel separation calculation value corresponding to the color pixel, the second color pixel, and the third color pixel respectively;

Calculate the difference between the first color brightness adjustment value and the first color pixel separation calculation value to obtain the first color brightness difference value, and calculate the second color brightness adjustment value and the second color pixel separation calculation value to obtain the second color Brightness difference, calculating the difference between the third color brightness adjustment value and the third color pixel separation calculation value to obtain the third color brightness difference.
The display driving method according to claim 11, wherein:

The step of calculating the driving current difference value corresponding to the brightness difference value further includes:

Calculating the corresponding first difference driving current, second difference driving current, and third difference driving current according to the first color brightness difference, the second color brightness difference, and the third color brightness difference;

The step of calculating the driving voltage difference corresponding to the driving current difference further includes:

Calculate the corresponding first difference drive voltage, second difference drive voltage, and third difference drive voltage according to the first difference drive current, the second difference drive current, and the third difference drive current .
11. The display driving method of claim 12, wherein the step of calculating the compensation factor according to the driving voltage difference further comprises:

Calculate the relationship coefficients between the first differential drive voltage, the second differential drive voltage, and the third differential drive voltage and each gray scale of 0-255 gray scales, and use the relationship coefficients as the The compensation factor.
The display driving method according to claim 1, wherein said performing compensation adjustment for each gray-scale data in each color pixel corresponding to each of the average gray-scale values respectively comprises:

Obtain the compensation voltage of the average grayscale value corresponding to any color pixel;

Calculating a compensation gamma register value corresponding to the compensation voltage;

Obtaining the first gamma register value of each gray level of 0-255 gray levels corresponding to the preset gamma coefficient;

Add the compensation gamma register value and the first gamma register value of each gray level in the 0-255 gray level to obtain the second gamma corresponding to each gray level in the 0-255 gray level Register value

Adjust the grayscale data in any one color pixel according to the corresponding relationship between the second gamma register value and the grayscale data, and obtain the adjusted grayscale data.
15. The display driving method of claim 14, wherein the obtaining the adjusted grayscale data according to the correspondence between the second gamma register value and grayscale data further comprises:

Reading the second gamma register value corresponding to each gray level;

Find the first gamma register value with the smallest difference from the second gamma register value, and use the grayscale data corresponding to the first gamma register value as the adjusted grayscale data corresponding to the second gamma register value , And update the adjusted gray scale data and the second gamma register value to the gray scale data and register value mapping table.
15. The display driving method according to claim 15, wherein setting a compensation factor of any one of the grayscale data corresponding to the pixel of any one color comprises:

Under the preset gamma coefficient, determine the brightness difference between the actual brightness of each gray scale of 0-255 gray scales in each color pixel and the ideal brightness;

Calculating a driving current difference corresponding to the brightness difference;

Calculate the driving voltage difference corresponding to the driving current difference, and use the driving voltage difference as the compensation voltage corresponding to the compensation factor.
The display driving method according to claim 16, wherein the actual brightness and the ideal brightness of each gray scale of 0-255 gray scales in each color pixel are determined under the preset gamma coefficient The steps of the brightness difference also include:

According to the target brightness corresponding to the preset gamma coefficient, adjust the brightness values corresponding to the first color pixel, the second color pixel, and the third color pixel in a single color, and obtain the first color brightness debugging value, the second color brightness debugging value, and The third color brightness adjustment value;

Detect the first brightness detection value when the fourth color light corresponding to each gray level in the 0-255 gray level is displayed, and the light emitted by the first color pixel, the second color pixel, and the third color pixel are mixed into the first color pixel Four-color light;

According to the display brightness of the fourth color pixel as the accumulation of the weight coefficients of the first color pixel, the second color pixel, and the third color brightness value according to a preset ratio, the first color in the fourth color is calculated. The first color pixel separation calculation value, the second color pixel separation calculation value, and the third color pixel separation calculation value corresponding to the color pixel, the second color pixel, and the third color brightness respectively;

Calculate the difference between the first color brightness adjustment value and the first color pixel separation calculation value to obtain the first color brightness difference value, and calculate the second color brightness adjustment value and the second color pixel separation calculation value to obtain the second color Brightness difference, calculating the difference between the third color brightness adjustment value and the third color pixel separation calculation value to obtain the third color brightness difference.
The display driving method according to claim 17, wherein:

The step of calculating the driving current difference value corresponding to the brightness difference value further includes:

A first difference driving current, a second difference driving current, and a third difference driving current corresponding to the first color brightness difference, the second color brightness difference, and the third color brightness difference;

The step of calculating the driving voltage difference corresponding to the driving current difference further includes:

Calculate the corresponding first difference drive voltage, second difference drive voltage, and third difference drive voltage according to the first difference drive current, the second difference drive current, and the third drive difference current .
The display driving method according to claim 13 or 17, wherein the preset gamma coefficient is Gamma2.2, the first color is red, the second color is green, and the third color is It is blue, and the fourth color is white.
A display device, characterized by comprising a display panel and a display driver, the display driver is used to provide at least one frame of picture data to the display panel to perform image display, the display driver includes at least a brightness dynamic compensation unit, the The brightness dynamic compensation unit is used to implement the display driving method according to any one of claims 1-19.
17. The display device according to claim 20, wherein the dynamic brightness compensation unit comprises a temporary storage unit, an image data statistics unit, and a compensation calculation unit, wherein:

The temporary storage unit is used to temporarily store data corresponding to the image data of the one frame of picture;

The image data statistics unit is used to obtain multiple grayscale data corresponding to all pixels in the display panel in a frame of picture, and calculate the average grayscale value of all grayscale data corresponding to each color pixel;

The compensation calculation unit is used to calculate the adjusted grayscale data.