Display control method of display panel and display device

Abstract

The application provides a display control method of a display panel and a display device. The display device comprises a display panel, a picture signal input module and a control module electrically connected with the display panel. The display panel comprises a plurality of sub-pixels. The control method of the display panel generates actual charging time of the plurality of sub-pixels according to the relationship between a first refresh frequency and a plurality of reference refresh frequencies and a plurality of reference charging times of the input picture signal, realizes display of the display panel, and makes the display effect of the display panel displaying the same brightness picture remain the same under different first refresh frequencies, thereby improving the flicker problem of the display panel caused by brightness difference when the display panel switches between high refresh frequency and low refresh frequency.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a display control method for a display panel and a display device. Background Technology

[0002] Gaming displays and commercial displays typically feature a variable refresh rate (Freesync function), which adjusts the screen's refresh rate according to the displayed content. However, changes in the refresh rate can cause flickering issues on the display panel. Summary of the Invention

[0003] This invention provides a display control method and display device for a display panel, which can improve the flickering problem of display panels with variable refresh rates.

[0004] This invention provides a display control method for a display panel, used to control the display panel, which includes a plurality of sub-pixels; the control method for the display panel includes:

[0005] Obtain the first refresh rate of the input screen signal;

[0006] Based on the first refresh frequency and the relationship between multiple reference refresh frequencies and multiple reference charging times, the actual charging time of multiple sub-pixels is generated, and control signals are generated based on the actual charging time of multiple sub-pixels and transmitted to the display panel to display the image.

[0007] Optionally, in some embodiments of the present invention, before the step of acquiring the first refresh frequency of the input screen signal, the method further includes: storing the relationship between a plurality of the reference refresh frequencies and a plurality of the reference charging times.

[0008] The multiple reference charging times refer to the multiple charging times corresponding to the display panel displaying the same brightness image at multiple reference refresh rates.

[0009] Optionally, in some embodiments of the present invention, the plurality of reference charging times are the plurality of charging times corresponding to the display panel displaying a screen with the same brightness having a first brightness and a screen with the same brightness having a second brightness at the plurality of reference refresh frequencies. The first brightness is different from the second brightness.

[0010] Optionally, in some embodiments of the present invention, the reference refresh frequency includes a plurality of binding point refresh frequencies and a plurality of other refresh frequencies, wherein at least two of the binding point refresh frequencies and the other refresh frequencies located between the at least two binding point refresh frequencies have a linear relationship with the corresponding charging time.

[0011] Optionally, in some embodiments of the present invention, when the display panel displays the same brightness image with the first brightness, the grayscale value corresponding to the plurality of sub-pixels is 127; when the display panel displays the same brightness image with the second brightness, the grayscale value corresponding to the plurality of sub-pixels is 255.

[0012] Optionally, in some embodiments of the present invention, the display panel has a plurality of second refresh frequencies, the plurality of second refresh frequencies having a minimum refresh frequency and a maximum refresh frequency; wherein, the plurality of point-binding refresh frequencies include the minimum refresh frequency and the maximum refresh frequency.

[0013] Optionally, in some embodiments of the present invention, the number of the plurality of binding point refresh frequencies is greater than or equal to 3.

[0014] The present invention also provides a display device, including a display panel, a screen signal input module, and a control module.

[0015] The display panel includes multiple sub-pixels; the image signal input module is used to provide an input image signal, the input image signal having a first refresh rate; the control module is electrically connected between the image signal input module and the multiple sub-pixels of the display panel, the control module is used to generate the actual charging time of the multiple sub-pixels according to the first refresh rate and the relationship between multiple reference refresh rates and multiple reference charging times, and transmit control signals to the display panel according to the actual charging time of the multiple sub-pixels, so that the display panel displays an image.

[0016] Optionally, in some embodiments of the present invention, the control module includes: a timing controller, configured to detect the first refresh frequency of the input screen signal, and retrieve the charging time corresponding to the display brightness of the plurality of sub-pixels according to the first refresh frequency.

[0017] Optionally, in some embodiments of the present invention, the control module further includes a power management chip and a driver chip. The power management chip is electrically connected between the timing controller and the display panel; the driver chip is electrically connected between the timing controller and the display panel. The power management chip and the driver chip are used to generate the control signal according to the charging time retrieved by the timing controller, and the plurality of sub-pixels are charged according to the control signal for the corresponding charging time to display the image.

[0018] This invention provides a display control method and a display device for a display panel. The display panel includes multiple sub-pixels. The control method includes: acquiring a first refresh rate of an input screen signal; generating actual charging times for multiple sub-pixels based on the first refresh rate and the relationship between multiple reference refresh rates and multiple reference charging times; and generating control signals based on the actual charging times of the multiple sub-pixels and transmitting them to the display panel to display the screen. The display device includes a display panel, a screen signal input module electrically connected to the display panel, and a control module. By generating actual charging times for multiple sub-pixels based on the first refresh rate of the input screen signal and the relationship between multiple reference refresh rates and multiple reference charging times, the display panel can achieve display functionality. This ensures that the display effect of the same brightness screen can be maintained at different first refresh rates, thereby improving the flickering problem caused by brightness differences when the display panel switches between high and low refresh rates. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram showing the duration variation of the vertical blanking interval at different refresh rates in the existing technology;

[0021] Figure 2 This is a flowchart of a display control method provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram comparing the vertical blanking interval duration at different refresh rates provided by embodiments of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the display device provided in an embodiment of the present invention. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0025] Specifically, such as Figure 1 This diagram illustrates the variation in the duration of the vertical blanking interval at different refresh rates in existing technologies. Normal Refresh Rate and Lower Refresh Rate correspond to high and low refresh rates, respectively; Frame N represents the Nth frame of the displayed image; Active Frame represents the displayed frame; Vblank represents the vertical blanking interval; and UI represents Unit. In existing display devices using Freesync mode, the refresh rate is typically adjusted by changing the duration of the vertical blanking interval (i.e., the duration of the vertical blanking interval at a low refresh rate is greater than that at a high refresh rate. For example, at a refresh rate of 240Hz, the duration of the vertical blanking interval is 45UI. At a refresh rate of 60Hz, if the display panel uses Freesync mode, the duration of the vertical blanking interval is 3420UI, which is significantly longer than that of a display panel using Freesync mode). However, the longer the vertical blanking interval, the greater the leakage current of the sub-pixel, and the greater the brightness variation of the sub-pixel. When the display panel rapidly switches between high and low refresh rates, the human eye will perceive a noticeable flickering phenomenon due to the large brightness changes of the displayed image.

[0026] Therefore, this application provides a display control method for a display panel and a display device, which can improve the brightness difference problem caused by uneven leakage current at different refresh rates in Freesync mode, that is, it can improve the screen flicker problem of the display panel when displaying with a variable refresh rate.

[0027] Figure 2This is a flowchart of a display control method provided in an embodiment of the present invention. The present invention provides a display control method for a display panel, the display panel including a plurality of sub-pixels. The control method for the display panel includes:

[0028] Obtain the first refresh rate of the input screen signal.

[0029] Based on the first refresh frequency and the relationship between multiple reference refresh frequencies and multiple reference charging times, the actual charging time of multiple sub-pixels is generated, and control signals are generated based on the actual charging time of multiple sub-pixels and transmitted to the display panel to display the image.

[0030] Optionally, the first refresh frequency of the input screen signal is equal to any one of the plurality of second refresh frequencies of the display panel.

[0031] By utilizing the relationship between multiple reference refresh frequencies and multiple reference charging times, the actual charging time corresponding to the display brightness of multiple sub-pixels at the first refresh frequency is obtained, thereby enabling the multiple sub-pixels to charge according to the actual charging time, and realizing the display of the display panel.

[0032] Furthermore, since the actual charging time of the multiple sub-pixels is obtained based on the relationship between the multiple reference refresh frequencies and the multiple reference charging times, as well as the first refresh frequency, the multiple sub-pixels charge according to the corresponding multiple actual charging times at different first refresh frequencies. This ensures that when the display panel displays an image of the same brightness at different first refresh frequencies, the display effect remains consistent, thereby improving the flickering problem caused by brightness differences when the display panel switches between high and low refresh frequencies.

[0033] Optionally, before the step of acquiring the first refresh frequency of the input screen signal, the method further includes: storing the relationship between a plurality of the reference refresh frequencies and a plurality of the reference charging times.

[0034] The multiple reference charging times refer to the multiple charging times corresponding to the display panel displaying the same brightness image at multiple reference refresh rates.

[0035] Optionally, the relationship between the plurality of reference refresh frequencies and the plurality of reference charging times can be stored in the form of a lookup table.

[0036] Optionally, since the charging time for each of the sub-pixels differs when the display panel displays images of different brightness levels, to simplify the program, the charging time for certain brightness images can be adjusted and stored to ensure that the brightness of the same image displayed by the display panel at different refresh rates tends to be consistent. Specifically, the multiple reference charging times are the multiple charging times corresponding to the display panel displaying the same image with a first brightness B1 and the same image with a second brightness B2 at multiple reference refresh rates. The first brightness B1 is different from the second brightness B2.

[0037] Optionally, the charging time corresponding to multiple sub-pixels at different refresh rates can be debugged and stored using the AMD FreeSync certification test screen. Specifically, the display panel can display a 127-grayscale image and a 255-grayscale image. That is, when the display panel displays the same brightness image with the first brightness B1, the grayscale value corresponding to multiple sub-pixels is 127; when the display panel displays the same brightness image with the second brightness B2, the grayscale value corresponding to multiple sub-pixels is 255.

[0038] Optionally, since the display panel has multiple second refresh frequencies, and the first refresh frequency is the same as any of the second refresh frequencies, to save software resources, multiple bound-point refresh frequencies fb can be selected from the multiple second refresh frequencies. The charging time corresponding to the multiple bound-point refresh frequencies is adjusted and stored. Then, based on the charging time obtained corresponding to the bound-point refresh frequencies, a linear interpolation method is used to obtain the charging time corresponding to the remaining second refresh frequencies. This allows multiple sub-pixels to be charged according to the corresponding charging time at the first refresh frequency, so that the brightness of the display panel displaying the same brightness image tends to be consistent at different refresh frequencies. Specifically, the reference refresh frequency includes multiple bound-point refresh frequencies fb and multiple other refresh frequencies. At least two of the bound-point refresh frequencies fb and the other refresh frequencies located between the at least two bound-point refresh frequencies fb have a linear relationship with the corresponding charging time.

[0039] Optionally, the number of the plurality of binding point refresh frequencies is greater than or equal to 2. Specifically, the plurality of second refresh frequencies have a minimum refresh frequency fmin and a maximum refresh frequency fmax. The plurality of binding point refresh frequencies fb include the minimum refresh frequency fmin and the maximum refresh frequency fmax, so that the charging time corresponding to other refresh frequencies can be obtained using linear interpolation based on the charging time obtained at the binding point refresh frequency fb.

[0040] Furthermore, the number of the plurality of binding point refresh frequencies fb is greater than or equal to 3. Specifically, the plurality of binding point refresh frequencies fb also includes any second refresh frequency between the minimum refresh frequency fmin and the maximum refresh frequency fmax.

[0041] The more refresh rate units (FBs) used, the more times the charging time needs to be adjusted, and the more software resources are consumed. Conversely, fewer FBs may result in inconsistent display performance across different refresh rates. Therefore, the selection of the number of FBs must consider product requirements and software resources. The number of FBs can be determined by grouping frequency bands based on the actual product specifications to optimize the display panel's performance. For example, if the second refresh rate range for the Freesync mode is 60Hz to 240Hz, then 11 FBs can be selected from this range. These FBs can be selected as 60Hz, 78Hz, 96Hz, 114Hz, 132Hz, 150Hz, 168Hz, 186Hz, 204Hz, 222Hz, and 240Hz.

[0042] Understandably, we can first test the product data before grouping, and then select the refresh frequency fb for targeted grouping and segmentation, and then conduct actual testing and debugging of the closed loop.

[0043] Taking the display panel in Freesync mode with a second refresh rate ranging from 60Hz to 240Hz as an example, the display control method provided in this application will be illustrated.

[0044] First, select multiple bound refresh frequencies (fb) from a range of secondary refresh frequencies ranging from 60Hz to 240Hz. For example, select 11 bound refresh frequencies (fb) from the range of secondary refresh frequencies ranging from 60Hz to 240Hz. The bound refresh frequencies (fb) can be selected as 60Hz, 78Hz, 96Hz, 114Hz, 132Hz, 150Hz, 168Hz, 186Hz, 204Hz, 222Hz, and 240Hz.

[0045] Subsequently, at different point-binding refresh rates (fb), the display panel is made to display an image with the same brightness level of the first brightness level B1. For example, this can be achieved at 11 different point-binding refresh rates (fb). Achieving this at different point-binding refresh rates (fb) requires adjusting the charging time of multiple sub-pixels. It can be understood that achieving this at different point-binding refresh rates (fb) means displaying an image with a brightness level close to the first brightness level B1.

[0046] Then, the charging time (i.e., reference charging time) corresponding to the display panel achieving the same brightness image with the first brightness B1 under different binding refresh frequencies fb will be stored.

[0047] Then, at different point refresh rates fb, the display panel displays the same brightness image with the second brightness B2; and the charging time (i.e. reference charging time) corresponding to the display panel displaying the same brightness image with the second brightness B2 at different point refresh rates fb is stored.

[0048] Then, using the charging time corresponding to multiple refresh frequencies fb as a benchmark, the charging time (i.e., reference charging time) corresponding to multiple other refresh frequencies is calculated through linear interpolation, thus obtaining the relationship between multiple reference refresh frequencies and multiple reference charging times. This relationship is then stored using a lookup table. The storage format is shown in the table below:

[0049] fb / Hz fmax f1 f2 f3 f4 f5 f6 f7 f8 f9 fmin Charging time / UI A11 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 B1 / nits N11 N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 B2 / nits M11 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10

[0050] Where f1 to f9 represent the refresh rate of the bound point, and the values ​​of f1 to f9 are not equal; the values ​​of A1 to A11 can be partially equal or completely unequal; the values ​​of N1 to N11 can be equal; the values ​​of M1 to M11 can be equal; the charging time corresponding to enabling the display panel to display the same brightness image with the first brightness B1 can be equal to the charging time corresponding to enabling the display panel to display the same brightness image with the second brightness B2, so as to save software resources.

[0051] Finally, after detecting the first refresh rate of the input screen signal, the charging time (i.e., the actual charging time) corresponding to the first refresh rate is obtained according to the stored lookup table, and a control signal is generated and transmitted to the display panel, so that multiple sub-pixels are charged according to the actual charging time to realize the display of the screen.

[0052] like Figure 3This is a schematic diagram comparing the vertical blanking interval duration at different refresh rates provided by embodiments of the present invention. Wherein, V display represents the duration of the display panel showing the image. Figure 3 It can be seen that at different refresh rates, the brightness of the same image displayed on the display panel can remain consistent, resulting in no brightness difference after frequency conversion. The duration of the vertical blanking interval Vblank is determined by the sum of the number of sub-pixels (Vp) in a vertical column and the spacing (blank) between sub-pixels (Vtt = Vp + blank), the frame rate (Fr), and the refresh rate (f). That is, the vertical blanking interval duration equals Vtt * Fr / f - blank; for example, the vertical blanking interval duration is equal to 1125 * 240 / f - 1080.

[0053] Because the vertical blanking interval Vblank corresponding to a low refresh rate is longer than that corresponding to a high refresh rate, the leakage time of sub-pixels in the display panel is longer, resulting in a greater fluctuation in the brightness of the display panel. If the display control method provided in this application is adopted, during initial debugging, the charging time corresponding to multiple second refresh rates is set to A; then, multiple bound refresh rates fb are selected, and the charging time corresponding to these bound refresh rates fb is adjusted to make the brightness of the display panel when displaying the same brightness image more consistent. Other refresh rates are linearly interpolated based on the charging time corresponding to the bound refresh rate fb, forming a lookup table. Finally, the data in the lookup table is retrieved according to the input image signal having a first refresh rate, causing multiple sub-pixels to charge according to their corresponding charging times. This reduces the leakage difference between high and low refresh rates, thereby making the brightness of the display panel more consistent for high and low refresh rates, achieving the goal of improving the flickering problem of display panels using Freesync mode.

[0054] Figure 4 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. The present invention also provides a display device, including a display panel 100, a screen signal input module 200, and a control module 300.

[0055] The display panel 100 includes a plurality of sub-pixels. Optionally, the display panel includes a self-emissive display panel, a passively emissive display panel, etc.

[0056] The screen signal input module 200 is used to provide an input screen signal, which has a first refresh rate. Optionally, the screen signal input module 200 includes a graphics card, a graphics processor, etc. Optionally, the screen signal input module 200 is electrically connected to the control module 300, and the screen signal input module 200 outputs a data enable signal (DE) to the control module 300, and the control module 300 detects the first refresh rate of the input screen signal based on the data enable signal.

[0057] The control module 300 is electrically connected between the screen signal input module 200 and the multiple sub-pixels of the display panel 100. The control module 300 is used to generate the actual charging time of the multiple sub-pixels according to the first refresh frequency and the relationship between the multiple reference refresh frequencies and the multiple reference charging times, and to transmit control signals to the display panel according to the actual charging time of the multiple sub-pixels so that the display panel displays the screen.

[0058] Optionally, the control module 300 includes a timing controller 301. The timing controller 301 is used to detect the first refresh frequency of the input screen signal and retrieve the charging time corresponding to the display brightness of the plurality of sub-pixels according to the first refresh frequency.

[0059] Optionally, the relationship between the plurality of reference refresh frequencies and the plurality of reference charging times can be stored in the timing controller 301 in the form of a lookup table. The relationship between the plurality of reference refresh frequencies and the plurality of reference charging times can be obtained by the control module 300 according to the steps in the display control method described above, and will not be repeated here.

[0060] Optionally, the control module 300 further includes a power management chip 302 and a driver chip 303. The power management chip 302 is electrically connected between the timing controller 301 and the display panel 100; the driver chip 303 is electrically connected between the timing controller 301 and the display panel 100. The power management chip 302 and the driver chip 303 are used to generate the control signal according to the charging time retrieved by the timing controller 301, and the plurality of sub-pixels are charged according to the control signal for the corresponding charging time to display the image.

[0061] Optionally, the timing controller 301 can output clock signals CKH / CKL to the power management chip 302, so that the power management chip 302 generates clock signals CK1 to CK8 according to the clock signals CKH / CKL. The timing controller 301 outputs a trigger pulse (TP) to the driver chip 303, indicating that a data signal is input to the display panel 100. The clock signals CK1 to CK8 output by the power management chip 302, in conjunction with the trigger pulse output by the driver chip 303, cause each row of sub-pixels to be charged according to the corresponding charging time, thereby realizing the display of the screen on the display panel.

[0062] Understandably, the display device includes portable display devices (such as laptops, mobile phones, etc.), fixed terminals (such as desktop computers, televisions, etc.), monitoring devices (such as fitness trackers, thermometers, monitors, etc.).

[0063] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A display control method for a display panel, used to control the display panel, characterized in that, The display panel includes multiple sub-pixels; the control method for the display panel includes: The first refresh rate of the input screen signal is obtained; the first refresh rate is equal to any one of the plurality of second refresh rates of the display panel; Based on the first refresh frequency and the relationship between multiple reference refresh frequencies and multiple reference charging times, the actual charging time of multiple sub-pixels is generated, and a control signal is generated based on the actual charging time of multiple sub-pixels and transmitted to the display panel to display the image; Before the step of acquiring the first refresh frequency of the input screen signal, the method further includes: storing the relationship between a plurality of reference refresh frequencies and a plurality of reference charging times; wherein, the plurality of reference charging times are the plurality of charging times corresponding to the display panel displaying a screen with the same brightness having a first brightness and a screen with the same brightness having a second brightness at the plurality of reference refresh frequencies; the first brightness and the second brightness are different; When the display panel displays an image with the same brightness having the first brightness, the grayscale value corresponding to the multiple sub-pixels is 127; when the display panel displays an image with the same brightness having the second brightness, the grayscale value corresponding to the multiple sub-pixels is 255; the reference refresh rate includes multiple point-binding refresh rates and multiple other refresh rates; The multiple reference charging times were obtained based on the following steps: Select one of the multiple binding point refresh frequencies from the plurality of second refresh frequencies; The charging time corresponding to displaying the same brightness image with the first brightness on the display panel under different binding refresh frequencies is stored as the first brightness and the reference charging time corresponding to different binding refresh frequencies. The charging time corresponding to displaying the same brightness image with the second brightness on the display panel under different binding refresh frequencies is stored as the second brightness and the reference charging time corresponding to different binding refresh frequencies. Based on the reference charging time corresponding to the first brightness and different binding refresh frequencies, and the reference charging time corresponding to the second brightness and different binding refresh frequencies, the reference charging time corresponding to the first brightness and the plurality of other refresh frequencies, and the reference charging time corresponding to the second brightness and the plurality of other refresh frequencies are calculated by linear interpolation.

2. The display control method according to claim 1, characterized in that, The refresh frequencies of at least two of the binding points and the other refresh frequencies located between the at least two binding point refresh frequencies have a linear relationship with the corresponding charging time.

3. The display control method according to claim 2, characterized in that, The display panel has multiple second refresh rates, each of which has a minimum refresh rate and a maximum refresh rate; wherein the multiple point-binding refresh rates include the minimum refresh rate and the maximum refresh rate.

4. The display control method according to claim 2, characterized in that, The number of refresh frequencies of the multiple binding points is greater than or equal to 3.

5. A display device, characterized in that, include: The display panel includes multiple sub-pixels; A screen signal input module is used to provide an input screen signal, wherein the input screen signal has a first refresh rate; The first refresh rate is equal to any one of the plurality of second refresh rates of the display panel; A control module is electrically connected between the image signal input module and multiple sub-pixels of the display panel. The control module is used to acquire a first refresh frequency of the input image signal, generate actual charging times for multiple sub-pixels based on the first refresh frequency and the relationship between multiple reference refresh frequencies and multiple reference charging times, and transmit control signals to the display panel based on the actual charging times of the multiple sub-pixels to enable the display panel to display an image. Before acquiring the first refresh frequency of the input image signal, the control module is also used to: store the relationship between the multiple reference refresh frequencies and the multiple reference charging times; wherein, the multiple reference charging times are the charging times corresponding to the display panel displaying an image with the same brightness (a first brightness) and an image with the same brightness (a second brightness) at the multiple reference refresh frequencies; wherein, the first brightness and the second brightness are different; when the display panel displays an image with the same brightness (a first brightness), the grayscale value corresponding to the multiple sub-pixels is 127; when the display panel displays an image with the same brightness (a second brightness), the grayscale value corresponding to the multiple sub-pixels is 255; the reference refresh frequencies include multiple point-binding refresh frequencies and multiple other refresh frequencies. The multiple reference charging times are obtained by the control module performing the following steps: Select one of the multiple binding point refresh frequencies from the plurality of second refresh frequencies; The charging time corresponding to displaying the same brightness image with the first brightness on the display panel under different binding refresh frequencies is stored as the first brightness and the reference charging time corresponding to different binding refresh frequencies. The charging time corresponding to displaying the same brightness image with the second brightness on the display panel under different binding refresh frequencies is stored as the second brightness and the reference charging time corresponding to different binding refresh frequencies. Based on the reference charging time corresponding to the first brightness and different binding refresh frequencies, and the reference charging time corresponding to the second brightness and different binding refresh frequencies, the reference charging time corresponding to the first brightness and the plurality of other refresh frequencies, and the reference charging time corresponding to the second brightness and the plurality of other refresh frequencies are calculated by linear interpolation.

6. The display device according to claim 5, characterized in that, The control module includes: A timing controller is used to detect the first refresh frequency of the input screen signal and retrieve the charging time corresponding to the display brightness of the plurality of sub-pixels according to the first refresh frequency.

7. The display device according to claim 6, characterized in that, The control module also includes: A power management chip is electrically connected between the timing controller and the display panel; The driver chip is electrically connected between the timing controller and the display panel; The power management chip and the driver chip are used to generate the control signal according to the charging time retrieved by the timing controller, and the multiple sub-pixels are charged according to the control signal for the corresponding charging time to display the image.

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