Driving method and driving device of display panel and display device

Abstract

The invention discloses a driving method and a driving device of a display panel and a display device. The driving method comprises the following steps: acquiring a to-be-displayed gray scale of the display panel; when the display panel is in a screen-off display mode, determining a screen-off display compensation value corresponding to the to-be-displayed gray scale; wherein the screen-off display compensation values corresponding to at least part of gray scales are different; and driving the display panel to display a picture according to the gray scale to be displayed and the screen-off display compensation value. The invention provides a driving method and a driving device of a display panel and a display device, which can improve the problem of poor display effect of the display panel in a screen-off display mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a driving method, a driving device and a display device of a display panel. BACKGROUND

[0002] With the development of display technology, a display panel can be partially lighted in a screen-off state. This partial lighting display mode is referred to as an Always On Display (AOD) mode.

[0003] In the AOD mode, the display panel is only partially lighted, which can save power consumption relative to the entire display panel being lighted. However, in the AOD mode, the display panel has the problem of poor display effect. SUMMARY

[0004] The present application provides a driving method, a driving device and a display device of a display panel, which can improve the problem of poor display effect of the display panel in the AOD mode.

[0005] According to an aspect of the present application, a driving method of a display panel is provided, which comprises:

[0006] obtaining a to-be-displayed gray scale of the display panel;

[0007] determining an AOD compensation value corresponding to the to-be-displayed gray scale when the display panel is in an AOD mode; wherein the AOD compensation values corresponding to at least part of the gray scales are different;

[0008] driving the display panel to display a picture according to the to-be-displayed gray scale and the AOD compensation value.

[0009] Optionally, when the display panel is in the AOD mode, determining the AOD compensation value corresponding to the to-be-displayed gray scale comprises:

[0010] when the display panel is in the AOD mode and the to-be-displayed gray scale is less than a set gray scale threshold, determining the AOD compensation value corresponding to the to-be-displayed gray scale; wherein the set gray scale threshold is less than or equal to 64;

[0011] Optionally, the set gray scale threshold is less than or equal to 32.

[0012] Optionally, the smaller the value of a gray scale is, the greater the absolute value of the AOD compensation value corresponding to the gray scale is.

[0013] Optionally, when the display panel is in the AOD mode, determining the AOD compensation value corresponding to the to-be-displayed gray scale comprises:

[0014] When the display panel is in the screen-off display mode, determining the screen-off display compensation value corresponding to the grayscale to be displayed according to the grayscale to be displayed and the pre-stored screen-off display compensation values ​​corresponding to at least two different preset grayscales, or determining the screen-off display compensation value corresponding to the grayscale to be displayed according to the grayscale to be displayed and a pre-stored correspondence between grayscales and screen-off display compensation values;

[0015] Optionally, the screen off display compensation value and the grayscale satisfy the following relationship:

[0016] Y=aX 2 +bX+c, where X is the grayscale, Y is the screen-off display compensation value, and a, b, and c are all set constants;

[0017] Optionally, determining the screen off display compensation value corresponding to the grayscale to be displayed according to the grayscale to be displayed and the screen off display compensation values ​​corresponding to at least two different preset grayscales stored in advance includes:

[0018] When the grayscale to be displayed is equal to one of the at least two different preset grayscales, the screen-off display compensation value corresponding to the preset grayscale equal to the grayscale to be displayed is used as the screen-off display compensation value of the grayscale to be displayed; when the grayscale to be displayed is not equal to any of the at least two different preset grayscales, the screen-off display compensation value corresponding to the grayscale to be displayed is determined by an interpolation algorithm based on the grayscale to be displayed and the screen-off display compensation values ​​corresponding to at least two different preset grayscales stored in advance.

[0019] Optionally, the display panel includes at least three sub-pixels of different luminous colors, and the screen-off display compensation value includes a sub-compensation value corresponding to the sub-pixel of each luminous color;

[0020] The step of determining the screen-off display compensation value corresponding to the grayscale to be displayed when the display panel is in the screen-off display mode includes:

[0021] When the display panel is in the screen-off display mode, a sub-compensation value corresponding to the grayscale to be displayed is determined according to the grayscale to be displayed and the luminous color of the sub-pixel.

[0022] Optionally, the driving the display panel to display an image according to the grayscale to be displayed and the screen-off display compensation value includes:

[0023] determining initial driving data corresponding to the grayscale to be displayed in the screen-off display mode based on a correspondence between the grayscale to be displayed and the grayscale of the display panel in the normal display mode and driving data; determining first driving data corresponding to the grayscale to be displayed based on the initial driving data and the screen-off display compensation value; and driving the display panel to display an image based on the first driving data;

[0024] Alternatively, a compensation gray scale value is determined according to the to-be-displayed gray scale and the screen-off display compensation value, a second driving data corresponding to the compensation gray scale value is determined according to the compensation gray scale value and a correspondence between gray scales and driving data of the display panel in the normal display mode, and the display panel is driven to display a picture according to the second driving data.

[0025] Optionally, when the display panel is in the screen-off display mode, before the to-be-displayed gray scale is determined to correspond to the screen-off display compensation value according to the to-be-displayed gray scale, the method further includes:

[0026] The screen-off display compensation values corresponding to at least two different preset gray scales are determined, or a correspondence between gray scales and screen-off display compensation values is determined.

[0027] Optionally, the determination of the screen-off display compensation values corresponding to at least two different preset gray scales includes:

[0028] The display compensation value corresponding to the set gray scale of the display panel in the screen-off display mode is determined according to first display data and second display data, wherein the first display data is display data of the display panel in the normal display mode when the set gray scale is displayed under third driving data, and the second display data is display data of the display panel in the screen-off display mode when the set gray scale is displayed under the third driving data.

[0029] The compensation data group corresponding to the display panel is determined according to the set gray scale, the display compensation value corresponding to the set gray scale, and a compensation data set, wherein the compensation data set includes a plurality of compensation data groups, and each compensation data group includes screen-off display compensation values corresponding to at least two different preset gray scales.

[0030] Optionally, the determination of the compensation data group corresponding to the display panel according to the set gray scale, the display compensation value, and the compensation data set includes:

[0031] When the preset gray scale equal to the set gray scale is determined in the compensation data set, a screen-off display compensation value closest to the display compensation value is determined from a plurality of screen-off display compensation values corresponding to the preset gray scale, and a compensation data group in which the screen-off display compensation value closest to the display compensation value is located is determined as the compensation data group corresponding to the display panel.

[0032] Optionally, the first display data includes a first color coordinate value and a first display brightness, and the second display data includes a second color coordinate value and a second display brightness.

[0033] The determination of the display compensation value corresponding to the set gray scale of the display panel in the screen-off display mode according to the first display data and the second display data includes:

[0034] determining a first initial compensation value corresponding to the set gray scale in the screen-off display mode according to the first color coordinate value, the second color coordinate value, the first display brightness and the second display brightness;

[0035] adjusting the first initial compensation value, so that a difference between an actual color coordinate value corresponding to the finally adjusted first initial compensation value and a target color coordinate value corresponding to the set gray scale in the screen-off display mode is within a color coordinate setting range, and a difference between an actual display brightness corresponding to the finally adjusted first initial compensation value and a target display brightness corresponding to the set gray scale in the screen-off display mode is within a brightness setting range, and taking the finally adjusted first initial compensation value as a display compensation value corresponding to the set gray scale in the screen-off display mode; wherein the actual color coordinate value corresponding to the finally adjusted first initial compensation value is a color coordinate value of the display panel when displaying a picture in the screen-off display mode according to the finally adjusted first initial compensation value and the set gray scale; and the actual display brightness corresponding to the finally adjusted first initial compensation value is a brightness of the display panel when displaying a picture in the screen-off display mode according to the finally adjusted first initial compensation value and the set gray scale;

[0036] Optionally, the determining of the first initial compensation value corresponding to the set gray scale in the screen-off display mode according to the first color coordinate value, the second color coordinate value, the first display brightness and the second display brightness comprises:

[0037] determining the first initial compensation value corresponding to the set gray scale in the screen-off display mode according to a difference between the first color coordinate value and the second color coordinate value, and a difference between the first display brightness and the second display brightness.

[0038] Optionally, before the determining of the compensation data set corresponding to the display panel according to the set gray scale, the display compensation value and the compensation data set, the method further comprises:

[0039] determining the compensation data set;

[0040] Optionally, the determining of the compensation data set comprises:

[0041] determining a screen-off display compensation value corresponding to a different display gray scale of each display panel according to third display data and fourth display data of a plurality of different display panels; wherein the third display data comprises display data of each display panel when displaying a plurality of different gray scale bind points in the normal display mode, and the fourth display data comprises display data of each display panel when displaying a plurality of different gray scale bind points in the screen-off display mode;

[0042] The compensation values corresponding to the multiple gray scale binding points of the same display panel are taken as a compensation data group;

[0043] The compensation data set is determined according to the compensation data groups corresponding to the multiple different display panels;

[0044] Optionally, the third display data includes third color coordinate values and third display brightness, and the fourth display data includes fourth color coordinate values and fourth display brightness.

[0045] The compensation values corresponding to the multiple gray scale binding points of the same display panel are taken as a compensation data group;

[0046] In the same display panel, the second initial compensation values corresponding to each gray scale binding point in the screen-off display mode of the display panel are determined according to the third color coordinate values, the fourth color coordinate values, the third display brightness and the fourth display brightness corresponding to each gray scale binding point.

[0047] The second initial compensation values corresponding to each gray scale binding point are adjusted, so that the difference between the actual color coordinate values corresponding to the finally adjusted second initial compensation values and the target color coordinate values corresponding to the gray scale binding points in the screen-off display mode is within a color coordinate setting range, and the difference between the actual display brightness corresponding to the finally adjusted second initial compensation values and the target display brightness corresponding to the gray scale binding points in the screen-off display mode is within a brightness setting range, and the finally adjusted second initial compensation values are taken as the screen-off display compensation values corresponding to the gray scale binding points in the screen-off display mode. The actual color coordinate values corresponding to the finally adjusted second initial compensation values are color coordinate values when the display panel displays a picture in the screen-off display mode according to the finally adjusted second initial compensation values and the gray scale binding points. The actual display brightness corresponding to the finally adjusted second initial compensation values is the brightness when the display panel displays a picture in the screen-off display mode according to the finally adjusted second initial compensation values and the gray scale binding points.

[0048] According to another aspect of the present application, a driving device of a display panel is provided, which includes an acquisition module, a determination module and a driving module.

[0049] The acquisition module is used to acquire a to-be-displayed gray scale of the display panel.

[0050] The determination module is used to determine a screen-off display compensation value corresponding to the to-be-displayed gray scale when the display panel is in a screen-off display mode. At least part of the screen-off display compensation values corresponding to the gray scales are different.

[0051] The driving module is configured to drive the display panel to display a picture according to the to-be-displayed gray scale and the screen-off compensation value.

[0052] According to another aspect of the present application, a display device comprises a display panel and a driving device of the display panel according to any of the embodiments of the present application.

[0053] The embodiment of the present application provides a driving method of a display panel, which comprises the following steps: obtaining a to-be-displayed gray scale of the display panel; determining a screen-off compensation value corresponding to the to-be-displayed gray scale when the display panel is in a screen-off display mode; and driving the display panel to display a picture according to the to-be-displayed gray scale and the screen-off compensation value. The screen-off compensation value in the embodiment can compensate the to-be-displayed gray scale, so that the actual display brightness and the target display brightness of the sub-pixel are close to each other, and the actual color coordinate value and the target color coordinate value of the sub-pixel are close to each other under the driving of the final driving data determined according to the to-be-displayed gray scale and the screen-off compensation value, thereby improving the display effect of the display panel. In conclusion, the driving method of the display panel provided by the embodiment can improve the poor display effect of the display panel in the screen-off display mode.

[0054] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0056] Figure 1 is a flowchart of a driving method of a display panel according to an embodiment of the present application;

[0057] Figure 2 is a curve diagram of a corresponding relationship between a gray scale and a screen-off compensation value according to an embodiment of the present application;

[0058] Figure 3 is a flowchart of a driving method of a display panel according to another embodiment of the present application;

[0059] Figure 4 is a flowchart of a driving method of a display panel according to another embodiment of the present application;

[0060] Figure 5is a flowchart of another method for driving a display panel according to an embodiment of the present application;

[0061] Figure 6 is a flowchart of another method for driving a display panel according to an embodiment of the present application;

[0062] Figure 7 is a structural diagram of a driving device of a display panel according to an embodiment of the present application. DETAILED DESCRIPTION

[0063] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative efforts should fall within the protection scope of the present application.

[0064] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to the process, method, product, or device.

[0065] The inventor has found that the reason why the display panel has poor display effect in the screen-off display mode is that the display panel uses the correspondence between the gray scale and the driving data in the normal display mode to drive the display panel to display a picture in the screen-off display mode, that is, the display panel uses a set of correspondence between the gray scale and the driving data in the screen-off display mode and the normal display mode. In the screen-off display mode, using the driving data in the normal display mode has problems such as poor matching with the characteristics or voltage configuration of the display panel, resulting in problems such as color cast in the screen-off display mode and large deviation between the actual display brightness and the target display brightness, thereby causing the display panel to have poor display effect in the screen-off display mode.

[0066] It should be noted that the normal display mode is a display mode different from the screen-off display mode, and the normal display mode can be understood as a display mode in which the entire display panel is lit.

[0067] The embodiment provides a driving method of a display panel, and can solve the problem of poor display effect of the display panel in the screen-off display mode.

[0068] Figure 1 is a flowchart of a driving method of a display panel according to the embodiment of the application, referring to Figure 1 The driving method provided by the embodiment comprises the following steps.

[0069] S110, obtaining a to-be-displayed gray scale of the display panel.

[0070] Specifically, the to-be-displayed gray scale can be a gray scale to be displayed by the display panel. The to-be-displayed gray scale of the display panel is a gray scale in a to-be-displayed picture of the display panel.

[0071] S120, determining a screen-off display compensation value corresponding to the to-be-displayed gray scale when the display panel is in the screen-off display mode; wherein the screen-off display compensation values corresponding to at least part of the gray scales are different.

[0072] Specifically, each to-be-displayed gray scale has a corresponding screen-off display compensation value. The screen-off display compensation value can be a driving data value required to be compensated by initial driving data corresponding to the to-be-displayed gray scale, and can also be a gray scale value required to be compensated by the to-be-displayed gray scale.

[0073] The screen-off display compensation value can compensate the brightness and color coordinate value of the sub-pixel displaying the to-be-displayed gray scale in the screen-off display mode, so that the actual display brightness of the sub-pixel displaying the to-be-displayed gray scale after compensation is close to the target display brightness, and the actual color coordinate value is close to the target color coordinate value, thereby improving the display effect of the display panel in the screen-off display mode.

[0074] When the screen-off display compensation value is not used for compensation, the actual display brightness of different gray scales is different, the actual color coordinate value of different gray scales is also different, and the screen-off display compensation values required by different gray scales can be different. The embodiment sets the screen-off display compensation values corresponding to at least part of the gray scales to be different, and sets the screen-off display compensation value corresponding to different to-be-displayed gray scales, so that the actual color coordinate value displayed by different to-be-displayed gray scales under the compensation driving of the corresponding screen-off display compensation value is close to the target color coordinate value corresponding to the to-be-displayed gray scale, and the actual display brightness displayed by the to-be-displayed gray scale is close to the target display brightness corresponding to the to-be-displayed gray scale, thereby improving the display effect of the display panel in the screen-off display mode.

[0075] S130, driving the display panel to display a picture according to the to-be-displayed gray scale and the screen-off display compensation value.

[0076] Specifically, driving the display panel to display an image based on the grayscale to be displayed and the screen-off display compensation value may involve determining initial driving data corresponding to the grayscale to be displayed based on the grayscale to be displayed, determining final driving data for the grayscale to be displayed in the screen-off display mode based on the initial driving data and the screen-off display compensation value, and driving the display panel to display the image based on the final driving data. The initial driving data may be driving data corresponding to the grayscale to be displayed in the normal display mode, or may be driving data determined based on driving data corresponding to the grayscale to be displayed in the normal display mode. Additionally, driving the display panel to display an image based on the grayscale to be displayed and the screen-off display compensation value may involve determining a compensated grayscale value based on the screen-off display compensation value, determining a compensated grayscale based on the grayscale to be displayed and the compensated grayscale value, determining final driving data based on the compensated grayscale, and finally driving the display panel to display an image based on the final driving data. The final driving data may be driving data corresponding to the compensated grayscale in the normal display mode, or may be driving data determined based on driving data corresponding to the compensated grayscale in the normal display mode.

[0077] The present embodiment provides a method for driving a display panel, the method comprising: first obtaining the grayscale to be displayed of the display panel, then determining the screen-off display compensation value corresponding to the grayscale to be displayed when the display panel is in the screen-off display mode, and finally driving the display panel to display a picture according to the grayscale to be displayed and the screen-off display compensation value. The screen-off display compensation value in the present embodiment can compensate for the grayscale to be displayed, so that the actual display brightness displayed by the sub-pixel is close to its target display brightness and the actual color coordinate value displayed is close to the target color coordinate value when driven by the final driving data determined according to the grayscale to be displayed and the screen-off display compensation value, thereby improving the display effect of the display panel. In summary, the method for driving a display panel provided by the present embodiment can improve the problem of poor display effect of the display panel in the screen-off display mode.

[0078] Optionally, when the display panel is in the screen-off display mode, determining a screen-off display compensation value corresponding to a grayscale to be displayed includes: when the display panel is in the screen-off display mode and the grayscale to be displayed is less than a set grayscale threshold, determining the screen-off display compensation value corresponding to the grayscale to be displayed. Wherein, the set grayscale threshold is less than or equal to 64.

[0079] Specifically, the display panel can display grayscales in the range of 0 to 255. In the off-screen display mode, color shift is severe at low display grayscales, and the actual display brightness differs significantly from the target brightness. Therefore, this embodiment provides for compensation of the to-be-displayed grayscale when the to-be-displayed grayscale is less than 64. This ensures that the display effect in the off-screen display mode is improved while reducing the compensation amount and increasing the driving speed. Optionally, the grayscale threshold is set to be less than or equal to 32.

[0080] Specifically, when the display panel displays a gray scale of 32 or less in the screen-off display mode, color deviation and brightness deviation are relatively large. By compensating the gray scale of 32 or less, the display effect in the screen-off display mode can be improved, and the compensation amount can be further reduced, and the driving speed can be improved.

[0081] Optionally, the smaller the gray scale value is, the larger the absolute value of the screen-off display compensation value corresponding to the gray scale is.

[0082] Specifically, the inventors have found that the smaller the gray scale is, the more serious the color deviation in the screen-off display mode is, and the larger the brightness deviation is. By setting the smaller gray scale, the absolute value of the screen-off display compensation value is larger, so that the screen-off display compensation value can better compensate the color deviation and the brightness deviation in different gray scales, and the display effect of the display panel is improved.

[0083] Optionally, when the display panel is in the screen-off display mode, the screen-off display compensation value corresponding to the to-be-displayed gray scale is determined, including: when the display panel is in the screen-off display mode, the screen-off display compensation value corresponding to the to-be-displayed gray scale is determined according to the to-be-displayed gray scale and the screen-off display compensation values corresponding to at least two different preset gray scales which are stored in advance.

[0084] Specifically, when the display panel is in the screen-off display mode, the to-be-displayed gray scale can be searched in the different preset gray scales stored in the display device to find a preset gray scale equal to the to-be-displayed gray scale. After the preset gray scale equal to the to-be-displayed gray scale is found, the screen-off display compensation value corresponding to the preset gray scale equal to the to-be-displayed gray scale is taken as the screen-off display compensation value corresponding to the to-be-displayed gray scale. If no preset gray scale equal to the to-be-displayed gray scale is found, the screen-off display compensation value corresponding to the to-be-displayed gray scale can be determined by an interpolation algorithm according to the at least two different preset gray scales and the screen-off display compensation values corresponding to the different preset gray scales.

[0085] According to the embodiment, the screen-off display compensation value corresponding to the to-be-displayed gray scale is determined according to the to-be-displayed gray scale and the screen-off display compensation values corresponding to at least two different preset gray scales which are stored in advance. The display panel only needs to store the screen-off display compensation values corresponding to two or more preset gray scales, without occupying a large storage space of the display panel, thereby reducing the cost of the display panel.

[0086] Optionally, when the display panel is in the screen-off display mode, the screen-off display compensation value corresponding to the to-be-displayed gray scale is determined, including: the screen-off display compensation value corresponding to the to-be-displayed gray scale is determined according to the to-be-displayed gray scale and a corresponding relationship between the gray scale and the screen-off display compensation value which is stored in advance.

[0087] Specifically, the grayscale to be displayed is substituted into the correspondence between the pre-stored grayscale and the screen-off display compensation value to determine the screen-off display compensation value corresponding to the grayscale to be displayed. For example, if the correspondence between the pre-stored grayscale and the screen-off display compensation value is a linear equation, the grayscale to be displayed is substituted into the linear equation to determine the screen-off display compensation value; if the correspondence between the pre-stored grayscale and the screen-off display compensation value is a quadratic equation, the grayscale to be displayed is substituted into the quadratic equation to determine the screen-off display compensation value.

[0088] The correspondence between the grayscale and the screen-off display compensation value pre-stored in this embodiment determines the screen-off display compensation value corresponding to the grayscale to be displayed. The determined screen-off compensation value is more accurate, and can better compensate the display panel and improve the display effect of the display panel.

[0089] Optionally, the screen-off display compensation value and the grayscale satisfy the following relationship:

[0090] Y=aX 2 +bX+c, where X is the grayscale, Y is the screen-off display compensation value, and a, b, and c are all set constants.

[0091] Specifically, a, b, and c are all known. Once the grayscale to be displayed is determined, X = grayscale to be displayed can be substituted into Y = aX 2 +bX+c relationship, thereby determining the screen-off display compensation value Y. It can be seen that the method of determining the screen-off display compensation value in this embodiment is simple and is only related to the grayscale to be displayed. It can be applied to a variety of different display panels and can also quickly determine the screen-off display compensation value of the grayscale to be displayed, thereby improving the driving efficiency of the display panel.

[0092] Figure 2 is a curve diagram of the corresponding relationship between grayscale and screen-off display compensation value provided by an embodiment of the present invention, with reference to Figure 2 , Figure 2 Three sets of curves are shown, representing the relationship between grayscale and screen-off display compensation values: curve S1, curve S2, and curve S3. Each of these curves is a portion of a parabola. Any of curves S1-S3 can be stored based on the display panel's performance. The horizontal axis of each curve represents grayscale, and the vertical axis represents the screen-off display compensation value.

[0093] Optionally, the step of determining the off-screen display compensation value corresponding to the to-be-displayed gray scale according to the to-be-displayed gray scale and the pre-stored off-screen display compensation values corresponding to the at least two different preset gray scales comprises: when the to-be-displayed gray scale is equal to one of the at least two different preset gray scales, taking the off-screen display compensation value corresponding to the preset gray scale equal to the to-be-displayed gray scale as the off-screen display compensation value of the to-be-displayed gray scale; and when the to-be-displayed gray scale is not equal to any of the at least two different preset gray scales, determining the off-screen display compensation value corresponding to the to-be-displayed gray scale according to the to-be-displayed gray scale and the pre-stored off-screen display compensation values corresponding to the at least two different preset gray scales by using an interpolation algorithm.

[0094] Specifically, by storing a part of the off-screen display compensation values corresponding to the preset gray scales instead of storing all the off-screen display compensation values corresponding to the preset gray scales that can be displayed by the display panel, the storage space of the display device in which the display panel is located can be reduced, and the off-screen display compensation values corresponding to the preset gray scales that are not stored in the display device can be determined by using the stored off-screen display compensation values corresponding to the preset gray scales and the interpolation algorithm. It can be seen that the method for determining the off-screen display compensation value of the to-be-displayed gray scale is quick and simple, and has high accuracy, and the driving efficiency and display effect of the display panel can be improved.

[0095] Optionally, the display panel comprises at least three sub-pixels of different light-emitting colors, and the off-screen display compensation value comprises a sub-compensation value corresponding to each sub-pixel of a light-emitting color.

[0096] Specifically, the light-emitting color of the sub-pixel can be red, green or blue. For example, under the same to-be-displayed gray scale, the off-screen display compensation value comprises a sub-compensation value corresponding to a sub-pixel emitting red light, a sub-compensation value corresponding to a sub-pixel emitting blue light, and a sub-compensation value corresponding to a sub-pixel emitting green light.

[0097] Optionally, when the display panel is in the off-screen display mode, the step of determining the off-screen display compensation value corresponding to the to-be-displayed gray scale comprises: when the display panel is in the off-screen display mode, determining a sub-compensation value corresponding to the to-be-displayed gray scale according to the to-be-displayed gray scale and the light-emitting color of the sub-pixel.

[0098] Specifically, under the same to-be-displayed gray scale, the sub-compensation values required by the sub-pixels of different light-emitting colors can be different, and the sub-compensation value of the to-be-displayed gray scale is determined according to the light-emitting color of the sub-pixel in this embodiment, so that the compensation accuracy of the sub-compensation value to the sub-pixel can be improved, and the display effect of the display panel in the off-screen display mode can be further improved.

[0099] Optionally, Figure 3 is a flowchart of another driving method of a display panel according to an embodiment of the present application, and the driving method comprises the following steps: Figure 3 ​

[0100] S210, acquire a to-be-displayed gray scale of the display panel.

[0101] Specifically, the content of step S210 is the same as that of step S110, and the description of step S210 is detailed in the description of step S110, which will not be repeated here.

[0102] S220, when the display panel is in the screen-off display mode, determine a screen-off display compensation value corresponding to the to-be-displayed gray scale; wherein the screen-off display compensation values corresponding to at least part of the gray scales are different.

[0103] Specifically, the content of step S220 is the same as that of step S120, and the description of step S220 is detailed in the description of step S120, which will not be repeated here.

[0104] S230, determine the initial driving data corresponding to the to-be-displayed gray scale in the screen-off display mode according to the to-be-displayed gray scale and the correspondence between the gray scale and the driving data of the display panel in the normal display mode.

[0105] Specifically, when the to-be-displayed gray scale is determined, the driving data corresponding to the to-be-displayed gray scale is found in the correspondence between the gray scale and the driving data in the normal display mode according to the to-be-displayed gray scale, and the driving data is taken as the initial driving data corresponding to the to-be-displayed gray scale. The initial driving data is related to the gamma register value corresponding to the to-be-displayed gray scale.

[0106] S240, determine the first driving data corresponding to the to-be-displayed gray scale according to the initial driving data and the screen-off display compensation value.

[0107] Specifically, after the initial driving data is determined, the difference between the initial driving data and the screen-off display compensation value can be taken as the first driving data, and finally the display panel is driven to display the picture through the first driving data.

[0108] S250, drive the display panel to display the picture according to the first driving data.

[0109] The initial driving data in the embodiment is the driving data corresponding to the gray scale in the normal display mode, and it can be seen that the driving method provided in the embodiment can still guarantee the display effect of the display panel in the screen-off display mode using the correspondence between the gray scale and the driving data in the normal display mode. The driving method provided in the embodiment drives and compensates the to-be-displayed gray scale in the screen-off display mode, and the display panel can share a set of correspondence between the gray scale and the driving data in the screen-off display mode and the normal display mode, without the need to additionally set a different correspondence between the gray scale and the driving data for the screen-off display mode from the normal display mode, thereby reducing the debugging time length of the display panel before leaving the factory, reducing the manufacturing cost of the display panel, and improving the display effect of the display panel.

[0110] Optionally, Figure 4 is a flowchart of another driving method of a display panel according to an embodiment of the present application. With reference to Figure 4 The driving method provided in this embodiment includes the following steps:

[0111] S310, obtaining a to-be-displayed gray scale of the display panel.

[0112] Specifically, the content of step S310 is the same as that of step S110. For the description of step S310, please refer to the description of step S110, which will not be repeated here.

[0113] S320, determining a screen-off display compensation value corresponding to the to-be-displayed gray scale when the display panel is in a screen-off display mode; wherein the screen-off display compensation values corresponding to at least part of the gray scales are different.

[0114] Specifically, the content of step S320 is the same as that of step S120. For the description of step S320, please refer to the description of step S120, which will not be repeated here.

[0115] S330, determining a compensation gray scale value according to the to-be-displayed gray scale and the screen-off display compensation value.

[0116] Specifically, the compensation gray scale value can be determined according to the sum or difference of the to-be-displayed gray scale and the screen-off display compensation value.

[0117] S340, determining second driving data corresponding to the compensation gray scale value according to the compensation gray scale value and the correspondence between the gray scale and the driving data of the display panel in a normal display mode.

[0118] Specifically, the driving data corresponding to the gray scale equal to the compensation gray scale value is found in the correspondence between the gray scale and the driving data of the display panel in the normal display mode according to the compensation gray scale value, and the driving data is taken as the second driving data corresponding to the compensation gray scale value. Finally, the display panel is driven to display a picture by using the second driving data.

[0119] S350, driving the display panel to display a picture according to the second driving data.

[0120] The second driving data in this embodiment is the driving data corresponding to the grayscale in the normal display mode. It can be seen that the driving method provided by this embodiment can still ensure the display effect of the display panel by using the correspondence between the grayscale and driving data in the normal display mode in the screen-off display mode. The driving method provided by this embodiment performs drive compensation for the grayscale to be displayed in the screen-off display mode. The display panel can share a set of correspondences between grayscale and driving data in the screen-off display mode and the normal display mode, without having to set an additional correspondence between grayscale and driving data for the screen-off display mode that is different from that in the normal display mode. This reduces the debugging time of the display panel before shipment, reduces the manufacturing cost of the display panel, and improves the display effect of the display panel.

[0121] Optionally, when the display panel is in the screen-off display mode, before determining the screen-off display compensation value corresponding to the grayscale to be displayed based on the grayscale to be displayed, it also includes: determining the screen-off display compensation values ​​corresponding to at least two different preset grayscales, or determining the correspondence between the grayscale and the screen-off display compensation value.

[0122] Specifically, before determining the screen-off display compensation value corresponding to the grayscale to be displayed based on the grayscale to be displayed, the screen-off display compensation value corresponding to the preset grayscale, or the corresponding relationship between the grayscale and the screen-off display compensation value, is first determined and stored in the display panel. When the display panel is driven to display an image, the screen-off display compensation value can be directly determined based on the grayscale to be displayed, thereby improving the driving efficiency of the display panel.

[0123] Optional, Figure 5 is a flow chart of another method for driving a display panel according to an embodiment of the present invention, with reference to Figure 5 The driving method provided in this embodiment includes the following steps:

[0124] S410. Determine a display compensation value corresponding to a grayscale set by the display panel in the screen-off display mode based on first display data and second display data; wherein the first display data is display data under the third driving data when the display panel displays the set grayscale in the normal display mode, and the second display data is display data under the third driving data when the display panel displays the set grayscale in the screen-off display mode.

[0125] Specifically, the third driving data may be driving data for normal display mode. The display panel uses the third driving data when displaying the set grayscale in both the off-screen display mode and the normal display mode. This indicates that, in this embodiment, the display compensation value can be determined using the same set of grayscale-to-driving data correspondences. The display compensation value can be determined based on the difference between the first display data and the second display data. In the off-screen display mode, the actual display data when the subpixel is driven to display the set grayscale based on the determined display compensation value and the third driving data is close to the target display data.

[0126] S420, determine the compensation data set corresponding to the display panel according to the set gray scale, the display compensation value corresponding to the set gray scale, and the compensation data set; wherein the compensation data set includes a plurality of compensation data sets, and each compensation data set includes at least two different preset gray scales corresponding to the off-screen display compensation value.

[0127] Specifically, the plurality of preset gray scales in the plurality of compensation data sets can be equal. For example, the compensation data set can include three compensation data sets, and the plurality of preset gray scales in each compensation data set can be 1, 2, 4, 6, 8, 12, 16, 20, 24, 32, etc. One preset gray scale in each compensation data set corresponds to one off-screen display compensation value.

[0128] The preset gray scale equal to the set gray scale can be found in the compensation data set according to the set gray scale, and then the off-screen display compensation value closest to the display compensation value can be found in the plurality of off-screen display compensation values corresponding to the preset gray scale. The data compensation set in which the off-screen display compensation value closest to the display compensation value is located is determined as the off-screen display compensation value corresponding to the at least two different preset gray scales.

[0129] S430, obtain the to-be-displayed gray scale of the display panel.

[0130] Specifically, the content of step S430 is the same as that of step S110, and the description of step S430 is detailed in the description of step S110, which will not be repeated here.

[0131] S440, determine the off-screen display compensation value corresponding to the to-be-displayed gray scale when the display panel is in the off-screen display mode; wherein the off-screen display compensation values corresponding to at least part of the gray scales are different.

[0132] Specifically, the content of step S440 is the same as that of step S120, and the description of step S440 is detailed in the description of step S120, which will not be repeated here.

[0133] S450, drive the display panel to display a picture according to the to-be-displayed gray scale and the off-screen display compensation value.

[0134] Specifically, the content of step S450 is the same as that of step S130, and the description of step S450 is detailed in the description of step S130, which will not be repeated here.

[0135] Optionally, determining the compensation data set corresponding to the display panel according to the set gray scale, the display compensation value, and the compensation data set includes: when the preset gray scale equal to the set gray scale is determined in the compensation data set, determining the off-screen display compensation value closest to the display compensation value in the plurality of off-screen display compensation values corresponding to the preset gray scale, and determining the compensation data set in which the off-screen display compensation value closest to the display compensation value is located as the compensation data set corresponding to the display panel.

[0136] Specifically, the compensation data set can be shown in Table 1 as follows:

[0137] Table 1

[0138]

[0139] The compensation data set shown in Table 1 includes three groups of compensation data, Gain1, Gain2 and Gain3, and each group of compensation data includes the same preset gray scale. The compensation data group corresponding to the display panel can be determined as follows: taking the set gray scale as 8, the display compensation value as 17, g 15 = 14, g 25 = 8, and g 35 = 18 as an example, the display compensation value of 17 is the closest to g 35 , and g 35 is in the compensation data group Gain3, which is taken as the compensation data group corresponding to the display panel. Exemplarily, Figure 2 The three curves shown correspond to Gain1, Gain2 and Gain3 in Table 1 respectively, and each curve can be expressed as Y = aX 2 +bX+c, at least one of a, b and c of the curves corresponding to Gain1, Gain2 and Gain3 is different. After determining the compensation data group used by the display panel, the display panel stores at least two different preset gray scales corresponding to the off-screen display compensation value in the compensation data group, or stores the correspondence between the gray scale and the off-screen display compensation value in the display panel.

[0140] Optionally, the first display data includes a first color coordinate value and a first display brightness; and the second display data includes a second color coordinate value and a second display brightness.

[0141] Specifically, the color coordinate xy is a representation method based on the CIE 1931 chromaticity diagram, which is used to describe the position and characteristics of colors. The first color coordinate value is [X N , Y N ], and the second color coordinate value is [X A , Y A ].

[0142] Optionally, determining the display compensation value corresponding to the set gray scale in the off-screen display mode of the display panel according to the first display data and the second display data includes:

[0143] determining a first initial compensation value corresponding to the set gray scale in the off-screen display mode according to the first color coordinate value, the second color coordinate value, the first display brightness and the second display brightness;

[0144] The first initial compensation value is adjusted, so that a difference between an actual color coordinate value corresponding to the finally adjusted first initial compensation value and a target color coordinate value corresponding to the set gray scale in the screen-off display mode is within a color coordinate setting range, and a difference between an actual display brightness corresponding to the finally adjusted first initial compensation value and a target display brightness corresponding to the set gray scale in the screen-off display mode is within a brightness setting range, and the finally adjusted first initial compensation value is taken as a display compensation value corresponding to the set gray scale in the screen-off display mode; wherein the actual color coordinate value corresponding to the finally adjusted first initial compensation value is a color coordinate value of the display panel when displaying a picture in the screen-off display mode according to the finally adjusted first initial compensation value and the set gray scale; and the actual display brightness corresponding to the finally adjusted first initial compensation value is a brightness of the display panel when displaying a picture in the screen-off display mode according to the finally adjusted first initial compensation value and the set gray scale.

[0145] Specifically, before the display compensation value is obtained, an initial first initial compensation value is determined. The first initial compensation value determined according to the first color coordinate value, the second color coordinate value, the first display brightness and the second display brightness has a smaller difference from the required display compensation value, so that the debugging time for determining the display compensation value is reduced.

[0146] After the first initial compensation value is adjusted each time, the driving data is determined again according to the adjusted first initial compensation value and the preset gray scale, the display panel is driven to display through the determined driving data, the actual display data of the display panel is obtained again, if the actual display data is close to the target display data, the adjustment of the first initial compensation value is stopped, if the actual display data is too far from the target display data, the first initial compensation value is continuously adjusted until the actual display data is close to the target display data.

[0147] Optionally, the first initial compensation value corresponding to the set gray scale in the screen-off display mode is determined according to the first color coordinate value, the second color coordinate value, the first display brightness and the second display brightness, and the first initial compensation value corresponding to the set gray scale in the screen-off display mode is determined according to a difference between the first color coordinate value and the second color coordinate value and a difference between the first display brightness and the second display brightness.

[0148] Specifically, the first color coordinate value is denoted as [X N ,Y N ], the second color coordinate value is denoted as [X A ,Y A ], the difference between the first color coordinate value and the second color coordinate value is X x[1] ,Y Y[1] , wherein X N -X A =X x[1] , Y N-Y A = Y y[1] .

[0149] According to the difference between the first color coordinate value and the second color coordinate value, and the difference between the first display brightness and the second display brightness, the difference between the actual display data in the normal display mode and the actual display data in the screen-off display mode under the same set gray scale can be determined. When the difference is too large, the absolute value of the first initial compensation value can be appropriately increased. When the difference is small, the absolute value of the first initial compensation value can be appropriately reduced. The first initial compensation value determined according to the difference between the first color coordinate value and the second color coordinate value, and the difference between the first display brightness and the second display brightness, can reduce the number of debugging to determine the display compensation value.

[0150] Optionally, before determining the compensation data set corresponding to the display panel according to the set gray scale, the display compensation value and the compensation data set, the method further includes: determining the compensation data set.

[0151] Optionally, Figure 6 is a flowchart of another driving method of a display panel provided by an embodiment of the present application, and reference is made to Figure 6 The driving method provided by the embodiment includes the following steps:

[0152] S510, determining, according to third display data and fourth display data of a plurality of different display panels, a screen-off display compensation value corresponding to each display gray scale of each display panel; wherein the third display data includes display data of each display panel when displaying a plurality of different gray scale bind points in a normal display mode, and the fourth display data includes display data of each display panel when displaying a plurality of different gray scale bind points in a screen-off display mode.

[0153] Specifically, a plurality of different display panels can be selected first, which can include a display panel with serious color deviation when displaying a low gray scale in a screen-off display mode, a display panel with moderate color deviation, and a display panel with light color deviation. In this way, the compensation data set determined can include compensation data sets corresponding to the three types of display panels. When determining, according to the compensation data set, a screen-off display compensation value corresponding to at least two different preset gray scales of the display panel, a suitable compensation data set can be selected according to the color deviation of the display panel under the low gray scale, thereby improving the compensation effect of the compensation data set on the display panel. The third display data and the fourth display data corresponding to the same gray scale bind point are both driven under the same driving data, which is the driving data corresponding to the display gray scale in the normal display mode.

[0154] S520, taking the screen-off display compensation values corresponding to a plurality of gray scale bind points of the same display panel as a compensation data set.

[0155] Specifically, continuing to refer to Table 1, the g11 , g 12 …g 10 , g 21 , g 22 …g 20 , g 31 , g 32 …g 30 The off-screen display compensation values can be for multiple different display panels, and Gain1, Gain2, and Gain3 represent three different display panel corresponding data compensation groups.

[0156] S530, determining compensation data sets according to the compensation data groups corresponding to the multiple different display panels.

[0157] Specifically, after determining the compensation data group corresponding to each display panel, multiple compensation data groups can be combined to form a compensation data set.

[0158] S540, determining display compensation values corresponding to the set gray scale of the display panel in the off-screen display mode according to the first display data and the second display data; wherein the first display data is the display data of the display panel in the third driving data when displaying the set gray scale in the normal display mode, and the second display data is the display data of the display panel in the third driving data when displaying the set gray scale in the off-screen display mode.

[0159] Specifically, the content of step S540 is the same as that of step S410, and the description of step S540 is detailed in the description of step S410, which will not be repeated here.

[0160] S550, determining the compensation data group corresponding to the display panel according to the set gray scale, the display compensation value corresponding to the set gray scale, and the compensation data set; wherein the compensation data set includes multiple compensation data groups, and each compensation data group includes at least two off-screen display compensation values corresponding to different preset gray scales.

[0161] Specifically, the content of step S550 is the same as that of step S420, and the description of step S550 is detailed in the description of step S420, which will not be repeated here.

[0162] S560, obtaining the to-be-displayed gray scale of the display panel.

[0163] Specifically, the content of step S560 is the same as that of step S110, and the description of step S560 is detailed in the description of step S110, which will not be repeated here.

[0164] S570, determining the off-screen display compensation value corresponding to the to-be-displayed gray scale when the display panel is in the off-screen display mode; wherein the off-screen display compensation values corresponding to at least part of the gray scales are different.

[0165] Specifically, the content of step S570 is the same as that of step S120, and the description of step S570 is detailed in the description of step S120, which will not be repeated here.

[0166] S580, driving the display panel to display a picture according to the to-be-displayed gray scale and the screen-off display compensation value.

[0167] Specifically, the content of step S580 is the same as that of step S130, and the description of step S580 is detailed in the description of step S130, which will not be repeated here.

[0168] Optionally, the third display data includes a third color coordinate value and a third display brightness, and the fourth display data includes a fourth color coordinate value and a fourth display brightness.

[0169] Optionally, the screen-off display compensation value corresponding to each display gray scale of each display panel is determined according to the third display data and the fourth display data of the plurality of different display panels, including:

[0170] In the same display panel, the second initial compensation value corresponding to each gray scale binding point of the display panel in the screen-off display mode is determined according to the third color coordinate value, the fourth color coordinate value, the third display brightness and the fourth display brightness corresponding to each gray scale binding point.

[0171] The second initial compensation value corresponding to each gray scale binding point is adjusted, so that the difference between the actual color coordinate value corresponding to the finally adjusted second initial compensation value and the target color coordinate value corresponding to the gray scale binding point in the screen-off display mode is within the color coordinate setting range, and the difference between the actual display brightness corresponding to the finally adjusted second initial compensation value and the target display brightness corresponding to the gray scale binding point in the screen-off display mode is within the brightness setting range, and the finally adjusted second initial compensation value is taken as the screen-off display compensation value corresponding to the gray scale binding point in the screen-off display mode. The actual color coordinate value corresponding to the finally adjusted second initial compensation value is the color coordinate value of the display panel when displaying a picture in the screen-off display mode according to the finally adjusted second initial compensation value and the gray scale binding point. The actual display brightness corresponding to the finally adjusted second initial compensation value is the brightness of the display panel when displaying a picture in the screen-off display mode according to the finally adjusted second initial compensation value and the gray scale binding point.

[0172] Specifically, for each gray scale binding point of each display panel, the method of determining the second initial compensation value and the screen-off display compensation value can be the same. After determining the screen-off display compensation value corresponding to each gray scale binding point of each display panel in turn by the same method, the compensation data set can be obtained.

[0173] Taking the case of determining the off-screen display compensation value of the gray scale binding point 16 as an example, the third color coordinate value of the gray scale binding point 16 is denoted as [X N1 ,Y N1 ], the fourth color coordinate value is denoted as [X N2 ,Y N2 ], the third display brightness is denoted as L1, and the fourth display brightness is denoted as L2. A second initial compensation value gain0 is determined according to the difference between X N1 and X N2 , the difference between Y N1 and Y N2 , and the difference between L1 and L2. The value of gain0 is adjusted until the actual display data of the gray scale binding point 16 under the driving of G XX ' is within the set range of the target display data. Then, the last adjusted gain0 is taken as the off-screen display compensation value of the gray scale binding point 16, where G XX ' can be equal to G XX minus the difference of the adjusted gain0, and G XX is the driving data corresponding to the gray scale binding point 16 in the normal display mode.

[0174] Figure 7 is a structural schematic diagram of a display panel driving device provided by an embodiment of the present application. Referring to Figure 7 , the display panel driving device provided by the embodiment includes an acquisition module 210, a determination module 220, and a driving module 230. The acquisition module 210 is configured to acquire a to-be-displayed gray scale of a display panel. The determination module 220 is configured to determine an off-screen display compensation value corresponding to the to-be-displayed gray scale when the display panel is in an off-screen display mode. At least part of the off-screen display compensation values corresponding to different gray scales are different. The driving module 230 is configured to drive the display panel to display a picture according to the to-be-displayed gray scale and the off-screen display compensation value.

[0175] The display panel driving device provided by the embodiment includes an acquisition module, a determination module, and a driving module. The acquisition module is configured to acquire a to-be-displayed gray scale of a display panel. The determination module is configured to determine an off-screen display compensation value corresponding to the to-be-displayed gray scale when the display panel is in an off-screen display mode. The driving module is configured to drive the display panel to display a picture according to the to-be-displayed gray scale and the off-screen display compensation value. The off-screen display compensation value in the embodiment can compensate the to-be-displayed gray scale, so that the actual display brightness and the target display brightness of a sub-pixel are close to each other, and the actual color coordinate value and the target color coordinate value of the sub-pixel are close to each other when the sub-pixel is driven according to the final driving data determined according to the to-be-displayed gray scale and the off-screen display compensation value. Therefore, the display effect of the display panel is improved. In summary, the display panel driving device provided by the embodiment can improve the problem that the display effect of the display panel in the off-screen display mode is poor.

[0176] Optionally, the determination module is specifically used to determine the screen-off display compensation value corresponding to the grayscale to be displayed when the display panel is in the screen-off display mode and the grayscale to be displayed is less than a set grayscale threshold; wherein the set grayscale threshold is less than or equal to 64.

[0177] Optionally, the determination module is specifically used to determine the screen off display compensation value corresponding to the grayscale to be displayed based on the grayscale to be displayed and the screen off display compensation values ​​corresponding to at least two different preset grayscales stored in advance when the display panel is in the screen off display mode, or to determine the screen off display compensation value corresponding to the grayscale to be displayed based on the correspondence between the grayscale to be displayed and the pre-stored grayscale and the screen off display compensation value.

[0178] Optionally, the determination module is further specifically used to, when the grayscale to be displayed is equal to one of the preset grayscales of at least two different preset grayscales, use the screen off display compensation value corresponding to the preset grayscale equal to the grayscale to be displayed as the screen off display compensation value of the grayscale to be displayed; when the grayscale to be displayed is not equal to any of the preset grayscales of at least two different preset grayscales, determine the screen off display compensation value corresponding to the grayscale to be displayed by an interpolation algorithm based on the grayscale to be displayed and the screen off display compensation values ​​corresponding to at least two different preset grayscales stored in advance.

[0179] Optionally, the display panel includes at least three sub-pixels of different luminous colors, and the screen-off display compensation value includes a sub-compensation value corresponding to the sub-pixel of each luminous color;

[0180] The determination module is further specifically configured to determine the sub-compensation value corresponding to the grayscale to be displayed according to the grayscale to be displayed and the luminous color of the sub-pixel when the display panel is in the screen-off display mode.

[0181] Optionally, the driving module is specifically configured to determine initial driving data corresponding to the grayscale to be displayed in the screen-off display mode based on a correspondence between the grayscale to be displayed and the grayscale of the display panel in the normal display mode and the driving data; determine first driving data corresponding to the grayscale to be displayed based on the initial driving data and the screen-off display compensation value; and drive the display panel to display an image based on the first driving data;

[0182] Alternatively, the driving module is specifically used to determine the compensation grayscale value based on the grayscale to be displayed and the screen-off display compensation value, determine the second driving data corresponding to the compensation grayscale value based on the correspondence between the compensation grayscale value and the grayscale of the display panel in normal display mode and the driving data, and drive the display panel to display the picture according to the second driving data.

[0183] Optionally, the driving device of the display panel also includes a compensation value determination module; the compensation value determination module is used to determine the screen off display compensation values ​​corresponding to at least two different preset grayscales, or to determine the correspondence between the preset grayscale and the screen off display compensation value.

[0184] Optionally, the compensation value determination module comprises a first determination unit and a second determination unit.

[0185] The first determination unit is configured to determine the display compensation value corresponding to the set gray scale in the screen-off display mode according to the first display data and the second display data; the first display data is the display data of the display panel in the third driving data when displaying the set gray scale in the normal display mode, and the second display data is the display data of the display panel in the third driving data when displaying the set gray scale in the screen-off display mode; the second determination unit is configured to determine the compensation data set corresponding to the display panel according to the set gray scale, the display compensation value corresponding to the set gray scale, and the compensation data set; the compensation data set comprises a plurality of compensation data sets, and each compensation data set comprises the screen-off display compensation values corresponding to at least two different preset gray scales.

[0186] Optionally, the second determination unit is specifically configured to, when determining that the preset gray scale equal to the set gray scale is in the compensation data set, determine the screen-off display compensation value closest to the display compensation value from the screen-off display compensation values corresponding to the preset gray scale, and determine the compensation data set in which the screen-off display compensation value closest to the display compensation value is located as the compensation data set corresponding to the display panel.

[0187] Optionally, the first display data comprises a first color coordinate value and a first display brightness; and the second display data comprises a second color coordinate value and a second display brightness.

[0188] The first determination unit comprises a first determination subunit and a second determination subunit.

[0189] The first determination subunit is configured to determine the first initial compensation value corresponding to the set gray scale in the screen-off display mode according to the first color coordinate value, the second color coordinate value, the first display brightness, and the second display brightness.

[0190] The second determination subunit is configured to adjust the first initial compensation value, so that the difference between the actual color coordinate value corresponding to the finally adjusted first initial compensation value and the target color coordinate value corresponding to the set gray scale in the screen-off display mode is within the color coordinate setting range, and the difference between the actual display brightness corresponding to the finally adjusted first initial compensation value and the target display brightness corresponding to the set gray scale in the screen-off display mode is within the brightness setting range, and take the finally adjusted first initial compensation value as the display compensation value corresponding to the set gray scale in the screen-off display mode; the actual color coordinate value corresponding to the finally adjusted first initial compensation value is the color coordinate value when driving the display panel to display a picture in the screen-off display mode according to the finally adjusted first initial compensation value and the set gray scale; and the actual display brightness corresponding to the finally adjusted first initial compensation value is the brightness when driving the display panel to display a picture in the screen-off display mode according to the finally adjusted first initial compensation value and the set gray scale.

[0191] The first determining subunit is specifically configured to determine the first initial compensation value corresponding to the gray scale in the screen-off display mode according to the difference between the first color coordinate value and the second color coordinate value and the difference between the first display brightness and the second display brightness.

[0192] Optionally, the driving device further comprises a compensation relationship determining module; the compensation relationship determining module is configured to determine the compensation data set.

[0193] Optionally, the compensation relationship determining module comprises a third determining unit, a fourth determining unit and a fifth determining unit.

[0194] The third determining unit is configured to determine the screen-off display compensation value corresponding to each display gray scale of each display panel according to third display data and fourth display data of the plurality of different display panels; the third display data comprises display data of each display panel when displaying a plurality of different gray scale bind points in a normal display mode, and the fourth display data comprises display data of each display panel when displaying a plurality of different gray scale bind points in a screen-off display mode; the fourth determining unit is configured to take the screen-off display compensation values corresponding to a plurality of gray scale bind points of the same display panel as a compensation data group; and the fifth determining unit is configured to determine the compensation data set according to the compensation data groups corresponding to the plurality of different display panels.

[0195] Optionally, the third display data comprises a third color coordinate value and a third display brightness, and the fourth display data comprises a fourth color coordinate value and a fourth display brightness.

[0196] The third determining unit comprises a third determining subunit and a fourth determining subunit.

[0197] The third determining subunit is configured to determine, in the same display panel, the second initial compensation value corresponding to each gray scale bind point of the display panel in the screen-off display mode according to the third color coordinate value, the fourth color coordinate value, the third display brightness and the fourth display brightness corresponding to each gray scale bind point.

[0198] The fourth determining sub-unit is configured to adjust the second initial compensation value corresponding to each gray scale binding point, so that the difference between the actual color coordinate value corresponding to the finally adjusted second initial compensation value and the target color coordinate value of the gray scale binding point in the screen-off display mode is within the color coordinate setting range, and the difference between the actual display brightness corresponding to the finally adjusted second initial compensation value and the target display brightness of the gray scale binding point in the screen-off display mode is within the brightness setting range, and the finally adjusted second initial compensation value is taken as the screen-off display compensation value of the gray scale binding point in the screen-off display mode; wherein the actual color coordinate value corresponding to the finally adjusted second initial compensation value is a color coordinate value when the display panel displays a picture in the screen-off display mode according to the finally adjusted second initial compensation value and the gray scale binding point; and the actual display brightness corresponding to the finally adjusted second initial compensation value is a brightness when the display panel displays a picture in the screen-off display mode according to the finally adjusted second initial compensation value and the gray scale binding point.

[0199] The display panel driving device provided in the embodiment has corresponding beneficial effects of the display panel driving method provided in any embodiment of the present application, and the technical details are not described in the embodiment. For details, refer to the display panel driving method provided in any embodiment of the present application.

[0200] The display device provided in the embodiment also includes the display panel and the display panel driving device provided in any embodiment of the present application.

[0201] Specifically, the display device provided in the embodiment can be a wearable product, a computer, a mobile phone, an iPad, or the like.

[0202] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0203] The specific embodiments described above do not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A driving method of a display panel, characterized by, The method comprises: acquiring a to-be-displayed gray scale of the display panel; when the display panel is in an off-screen display mode, determining an off-screen display compensation value corresponding to the to-be-displayed gray scale; wherein the off-screen display compensation values corresponding to at least some gray scales are different; driving the display panel to display a picture according to the to-be-displayed gray scale and the off-screen display compensation value.

2. The driving method according to claim 1, wherein The step of determining the off-screen display compensation value corresponding to the to-be-displayed gray scale when the display panel is in the off-screen display mode comprises: when the display panel is in the off-screen display mode and the to-be-displayed gray scale is smaller than a set gray scale threshold, determining the off-screen display compensation value corresponding to the to-be-displayed gray scale; wherein the set gray scale threshold is smaller than or equal to 64; Preferably, the set gray scale threshold is smaller than or equal to 32. Preferably, the smaller the value of a gray scale is, the greater the absolute value of the off-screen display compensation value corresponding to the gray scale is.

3. The driving method according to claim 1, wherein The step of determining the off-screen display compensation value corresponding to the to-be-displayed gray scale when the display panel is in the off-screen display mode comprises: when the display panel is in the off-screen display mode, determining the off-screen display compensation value corresponding to the to-be-displayed gray scale according to the to-be-displayed gray scale and the off-screen display compensation values corresponding to at least two different preset gray scales stored in advance, or determining the off-screen display compensation value corresponding to the to-be-displayed gray scale according to the to-be-displayed gray scale and a preset corresponding relationship between gray scales and off-screen display compensation values. Preferably, the off-screen display compensation value and the gray scale satisfy the following relationship: Y = aX 2 +bX+c, where X is a gray scale, Y is an off-screen display compensation value, and a, b and c are all set constants. Preferably, the step of determining the off-screen display compensation value corresponding to the to-be-displayed gray scale according to the to-be-displayed gray scale and the off-screen display compensation values corresponding to at least two different preset gray scales stored in advance comprises: when the to-be-displayed gray scale is equal to one of the at least two different preset gray scales, taking the off-screen display compensation value corresponding to the preset gray scale equal to the to-be-displayed gray scale as the off-screen display compensation value of the to-be-displayed gray scale; when the to-be-displayed gray scale is not equal to any of the at least two different preset gray scales, determining the off-screen display compensation value corresponding to the to-be-displayed gray scale according to the to-be-displayed gray scale and the off-screen display compensation values corresponding to the at least two different preset gray scales by an interpolation algorithm.

4. The driving method according to claim 1, wherein The display panel comprises at least three sub-pixels of different light-emitting colors, and the off-screen display compensation value comprises a sub-compensation value corresponding to each light-emitting color of the sub-pixels. The step of determining the off-screen display compensation value corresponding to the to-be-displayed gray scale when the display panel is in the off-screen display mode comprises: when the display panel is in the off-screen display mode, determining the sub-compensation value corresponding to the to-be-displayed gray scale according to the to-be-displayed gray scale and the light-emitting colors of the sub-pixels.

5. The driving method according to claim 1, wherein the step of driving the display panel to display a picture according to the to-be-displayed gray scale and the off-screen display compensation value comprises: ​ According to the to-be-displayed gray scale and the correspondence between the gray scale and the driving data of the display panel in the normal display mode, initial driving data corresponding to the to-be-displayed gray scale in the screen-off display mode is determined; according to the initial driving data and the screen-off display compensation value, first driving data corresponding to the to-be-displayed gray scale is determined; and the display panel is driven to display a picture according to the first driving data. Alternatively, a compensation gray scale value is determined according to the to-be-displayed gray scale and the screen-off display compensation value, second driving data corresponding to the compensation gray scale value is determined according to the correspondence between the compensation gray scale value and the driving data of the display panel in the normal display mode, and the display panel is driven to display a picture according to the second driving data.

6. The driving method of claim 1 or 2, wherein, Before determining the screen-off display compensation value corresponding to the to-be-displayed gray scale according to the to-be-displayed gray scale when the display panel is in the screen-off display mode, the method further comprises: determining screen-off display compensation values corresponding to at least two different preset gray scales, or determining a correspondence between gray scales and screen-off display compensation values. Preferably, the determining of the screen-off display compensation values corresponding to the at least two different preset gray scales comprises: determining a display compensation value corresponding to a set gray scale of the display panel in the screen-off display mode according to first display data and second display data; wherein the first display data is display data of the display panel when displaying the set gray scale under third driving data in the normal display mode, and the second display data is display data of the display panel when displaying the set gray scale under the third driving data in the screen-off display mode; determining a compensation data group corresponding to the display panel according to the set gray scale, the display compensation value corresponding to the set gray scale, and a compensation data set; wherein the compensation data set comprises a plurality of compensation data groups, and each compensation data group comprises screen-off display compensation values corresponding to at least two different preset gray scales. Preferably, the determining of the compensation data group corresponding to the display panel according to the set gray scale, the display compensation value, and the compensation data set comprises: when the preset gray scale equal to the set gray scale is determined in the compensation data set, a screen-off display compensation value closest to the display compensation value is determined from a plurality of screen-off display compensation values corresponding to the preset gray scale, and a compensation data group in which the screen-off display compensation value closest to the display compensation value is located is determined as the compensation data group corresponding to the display panel.

7. The driving method according to claim 6, wherein The first display data comprises a first color coordinate value and a first display brightness, and the second display data comprises a second color coordinate value and a second display brightness. The determining of the display compensation value corresponding to the set gray scale of the display panel in the screen-off display mode according to the first display data and the second display data comprises: determining a first initial compensation value corresponding to the set gray scale in the screen-off display mode according to the first color coordinate value, the second color coordinate value, the first display brightness, and the second display brightness. The first display data comprises a first color coordinate value and a first display brightness, and the second display data comprises a second color coordinate value and a second display brightness. The determining of the display compensation value corresponding to the set gray scale of the display panel in the screen-off display mode according to the first display data and the second display data comprises: determining a first initial compensation value corresponding to the set gray scale in the screen-off display mode according to the first color coordinate value, the second color coordinate value, the first display brightness, and the second display brightness. adjusting the first initial compensation value, so that the actual color coordinate value corresponding to the finally adjusted first initial compensation value is within a color coordinate setting range from the target color coordinate value corresponding to the set gray scale in the screen-off display mode, and the actual display brightness corresponding to the finally adjusted first initial compensation value is within a brightness setting range from the target display brightness corresponding to the set gray scale in the screen-off display mode, and taking the finally adjusted first initial compensation value as the display compensation value corresponding to the set gray scale in the screen-off display mode; wherein the actual color coordinate value corresponding to the finally adjusted first initial compensation value is a color coordinate value of the display panel when displaying a picture in the screen-off display mode according to the finally adjusted first initial compensation value and the set gray scale; and the actual display brightness corresponding to the finally adjusted first initial compensation value is a brightness of the display panel when displaying a picture in the screen-off display mode according to the finally adjusted first initial compensation value and the set gray scale. Preferably, the first initial compensation value corresponding to the set gray scale in the screen-off display mode is determined according to the first color coordinate value, the second color coordinate value, the first display brightness and the second display brightness, and comprises: determining the first initial compensation value corresponding to the set gray scale in the screen-off display mode according to a difference between the first color coordinate value and the second color coordinate value, and a difference between the first display brightness and the second display brightness.

8. The driving method according to claim 6, wherein Before the compensation data set corresponding to the display panel is determined according to the set gray scale, the display compensation value and the compensation data set, the method further comprises: determining the compensation data set; Preferably, the compensation data set is determined by: determining the screen-off display compensation value corresponding to each display gray scale of each display panel according to third display data and fourth display data of a plurality of different display panels; wherein the third display data comprises display data of each display panel when displaying a plurality of different gray scale bind points in the normal display mode, and the fourth display data comprises display data of each display panel when displaying a plurality of different gray scale bind points in the screen-off display mode; taking the screen-off display compensation values corresponding to a plurality of gray scale bind points of the same display panel as a compensation data group; determining the compensation data set according to the compensation data groups corresponding to a plurality of different display panels; Preferably, the third display data comprises a third color coordinate value and a third display brightness, and the fourth display data comprises a fourth color coordinate value and a fourth display brightness. The screen-off display compensation value corresponding to each display gray scale of each display panel is determined according to the third display data and the fourth display data of a plurality of different display panels, and comprises: in the same display panel, determining a second initial compensation value corresponding to each gray scale bind point of the display panel in the screen-off display mode according to the third color coordinate value, the fourth color coordinate value, the third display brightness and the fourth display brightness corresponding to each gray scale bind point; adjusting the second initial compensation value corresponding to each of the gray scale binding points, so that the difference between the actual color coordinate value corresponding to the finally adjusted second initial compensation value and the target color coordinate value corresponding to the gray scale binding point in the screen-off display mode is within the color coordinate setting range, and the difference between the actual display brightness corresponding to the finally adjusted second initial compensation value and the target display brightness corresponding to the gray scale binding point in the screen-off display mode is within the brightness setting range, taking the finally adjusted second initial compensation value as the screen-off display compensation value corresponding to the gray scale binding point in the screen-off display mode; wherein the actual color coordinate value corresponding to the finally adjusted second initial compensation value is the color coordinate value when the display panel displays a picture in the screen-off display mode according to the finally adjusted second initial compensation value and the gray scale binding point; and the actual display brightness corresponding to the finally adjusted second initial compensation value is the brightness when the display panel displays a picture in the screen-off display mode according to the finally adjusted second initial compensation value and the gray scale binding point.

9. A driving device of a display panel, characterized by comprising: comprising: an acquisition module, a determination module and a driving module; the acquisition module is used to acquire a to-be-displayed gray scale of the display panel; the determination module is used to determine a screen-off display compensation value corresponding to the to-be-displayed gray scale when the display panel is in a screen-off display mode; wherein the screen-off display compensation values corresponding to at least part of the gray scales are different; the driving module is used to drive the display panel to display a picture according to the to-be-displayed gray scale and the screen-off display compensation value.

10. A display device, characterized by comprising: a display panel and a driving device of the display panel of claim 9.

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