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 each sub-pixel of the display panel; determining driving data corresponding to the gray scale to be displayed in the local peak brightness mode; wherein the sub-pixels comprise a first preset light-emitting color sub-pixel, and when a to-be-displayed gray scale of the first preset light-emitting color sub-pixel is greater than or equal to a first preset gray scale, driving data corresponding to the to-be-displayed gray scale is the same; and according to the driving data corresponding to the to-be-displayed gray scale, driving the sub-pixel to display the to-be-displayed gray scale in the local peak brightness mode. On the basis of not changing the circuit, the screen body material and the data voltage range, the local peak brightness requirement is met, the cost is low, the consumed time is short, meanwhile, the data voltage range does not need to be adjusted, the panel temperature of the light-emitting area can be reduced, and the panel reliability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of display panels, and in particular to a display panel driving method, a driving device and a display device. Background Art

[0002] With the development of display technology, people have higher and higher requirements on display panels. However, existing display panels have the problem that the local peak brightness (APL, Area Part Lightness) cannot meet the requirements. Summary of the invention

[0003] The present invention provides a display panel driving method, a driving device and a display device, which can meet the APL requirements without changing the circuit, the screen material and the data voltage range of the DDIC, with low cost and less time consumption. At the same time, since there is no need to increase the data voltage range, the panel temperature of the light-emitting area can be reduced, thereby improving the panel reliability.

[0004] According to one aspect of the present invention, a method for driving a display panel is provided, the driving method comprising:

[0005] Obtaining the grayscale to be displayed of each sub-pixel of the display panel;

[0006] Determine driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the subpixel includes a first preset luminous color subpixel, and when the grayscale to be displayed of the first preset luminous color subpixel is greater than or equal to the first preset grayscale, the driving data corresponding to the grayscale to be displayed are the same;

[0007] The sub-pixels are driven to display the gray scale to be displayed in a local peak brightness mode according to the driving data corresponding to the gray scale to be displayed.

[0008] Further, the driving data includes a driving voltage;

[0009] When the grayscale to be displayed of the first preset luminescent color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel;

[0010] Optionally, the sub-pixel includes a driving transistor and a light-emitting unit, and the driving transistor is used to provide a driving current for the light-emitting unit;

[0011] The driving transistor is a P-type driving transistor. When the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel.

[0012] Furthermore, the first preset gray scale is smaller than the maximum gray scale of the display panel.

[0013] Further, the sub-pixel includes a second preset luminous color sub-pixel, and when the grayscale to be displayed of the second preset luminous color sub-pixel is greater than or equal to the second preset grayscale, the driving data corresponding to the grayscale to be displayed is the same and equal to the driving data corresponding to the maximum brightness of the second preset luminous color sub-pixel;

[0014] Optionally, the sub-pixel includes a third preset luminous color sub-pixel, and when the grayscale to be displayed of the third preset luminous color sub-pixel is greater than or equal to the third preset grayscale, the driving data corresponding to the grayscale to be displayed of each sub-pixel is the same and equal to the driving data corresponding to the maximum brightness of the third preset luminous color sub-pixel;

[0015] Optionally, the luminous efficiency of the third preset luminous color sub-pixel is higher than the luminous efficiency of the second preset luminous color sub-pixel, and the luminous efficiency of the second preset luminous color sub-pixel is higher than the luminous efficiency of the first preset luminous color sub-pixel;

[0016] The second preset grayscale is greater than or equal to the first preset grayscale, and the third preset grayscale is greater than or equal to the second preset grayscale;

[0017] Optionally, the first preset light-emitting color sub-pixel includes a blue sub-pixel, the second preset light-emitting color sub-pixel includes a red sub-pixel, and the third preset light-emitting color sub-pixel includes a green sub-pixel.

[0018] Furthermore, when the grayscale to be displayed of the first preset luminous color sub-pixel is less than the first preset grayscale, the driving data corresponding to different grayscales to be displayed are different;

[0019] Optionally, determining driving data corresponding to a grayscale to be displayed in a local peak brightness mode includes:

[0020] When the grayscale to be displayed of the first preset luminescent color sub-pixel is less than the first preset grayscale, the driving data corresponding to the grayscale to be displayed of the first preset luminescent color sub-pixel is determined according to the driving data of the first preset luminescent color sub-pixel corresponding to the binding point grayscale stored in the display panel;

[0021] Optionally, determining driving data corresponding to a grayscale to be displayed in a local peak brightness mode includes:

[0022] When the grayscale to be displayed of the first preset luminescent color sub-pixel is less than the first preset grayscale, the driving data corresponding to the grayscale to be displayed of the first preset luminescent color sub-pixel is determined by interpolation according to the driving data of the first preset luminescent color sub-pixel corresponding to at least two different binding point grayscales stored in the display panel;

[0023] Optionally, the driving data of the first preset luminous color sub-pixel corresponding to the binding point grayscale is determined according to the target brightness of the binding point grayscale, and the target brightness of the binding point grayscale is determined according to the target peak brightness of the local peak brightness mode.

[0024] Furthermore, when the grayscale to be displayed of the second preset luminous color sub-pixel is smaller than the second preset grayscale, the driving data corresponding to different grayscales to be displayed are different;

[0025] Optionally, determining driving data corresponding to a grayscale to be displayed in a local peak brightness mode includes:

[0026] When the grayscale to be displayed of the second preset luminescent color sub-pixel is less than the second preset grayscale, the driving data corresponding to the grayscale to be displayed of the second preset luminescent color sub-pixel is determined according to the driving data of the second preset luminescent color sub-pixel corresponding to the binding point grayscale stored in the display panel;

[0027] Optionally, determining driving data corresponding to a grayscale to be displayed in a local peak brightness mode includes:

[0028] When the grayscale to be displayed of the second preset luminescent color sub-pixel is less than the second preset grayscale, the driving data corresponding to the grayscale to be displayed of the second preset luminescent color sub-pixel is determined by interpolation according to the driving data of the second preset luminescent color sub-pixel corresponding to at least two different binding point grayscales stored in the display panel;

[0029] Optionally, when the grayscale to be displayed of the third preset luminous color sub-pixel is less than the third preset grayscale, the driving data corresponding to different grayscales to be displayed are different;

[0030] Optionally, determining driving data corresponding to a grayscale to be displayed in a local peak brightness mode includes:

[0031] When the grayscale to be displayed of the third preset luminescent color sub-pixel is less than the third preset grayscale, the driving data corresponding to the grayscale to be displayed of the third preset luminescent color sub-pixel is determined according to the driving data of the third preset luminescent color sub-pixel corresponding to the binding point grayscale stored in the display panel;

[0032] Optionally, determining driving data corresponding to a grayscale to be displayed in a local peak brightness mode includes:

[0033] When the grayscale to be displayed of the third preset luminescent color sub-pixel is less than the third preset grayscale, the driving data corresponding to the grayscale to be displayed of the third preset luminescent color sub-pixel is determined by interpolation according to the driving data of the third preset luminescent color sub-pixel corresponding to at least two different binding point grayscales stored in the display panel;

[0034] Optionally, driving data of the second preset luminous color sub-pixel and the third preset luminous color sub-pixel corresponding to the binding point grayscale are determined according to the target brightness of the binding point grayscale, and the target brightness of the binding point grayscale is determined according to the target peak brightness of the local peak brightness mode.

[0035] Furthermore, under different picture refresh frequencies, the driving data corresponding to the same grayscale to be displayed in the local peak brightness mode is the same.

[0036] According to another aspect of the present invention, there is provided a driving device for a display panel, the driving device comprising:

[0037] A grayscale acquisition module to be displayed, used for acquiring the grayscale to be displayed of each sub-pixel of the display panel;

[0038] A driving data determination module, used to determine driving data corresponding to a grayscale to be displayed in a local peak brightness mode; wherein the subpixel includes a first preset luminous color subpixel, and when the grayscale to be displayed of the first preset luminous color subpixel is greater than or equal to the first preset grayscale, the driving data corresponding to the grayscale to be displayed are the same;

[0039] The driving module is used to drive the sub-pixel to display the gray scale to be displayed in a local peak brightness mode according to the driving data corresponding to the gray scale to be displayed.

[0040] Further, the driving data includes a driving voltage;

[0041] When the grayscale to be displayed of the first preset luminescent color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the maximum driving voltage or the minimum driving voltage of the display panel;

[0042] Optionally, the sub-pixel includes a driving transistor and a light-emitting unit, and the driving transistor is used to provide a driving current for the light-emitting unit;

[0043] The driving transistor is a P-type driving transistor. When the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel.

[0044] According to another aspect of the present invention, a display device is provided. The display device includes a display panel and a driving device for the display panel as described in any of the above embodiments.

[0045] The driving method of the display panel provided by the embodiment of the present invention sets the driving data corresponding to the grayscale to be displayed to be the same when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, and the driving data corresponding to the grayscale to be displayed is the driving data corresponding to the maximum brightness of the first preset luminous color sub-pixel. Therefore, when the grayscale to be displayed is greater than or equal to the first preset grayscale, the luminous brightness of the first preset luminous color sub-pixel is the maximum luminous brightness, and the mixed brightness of the light emitted by the first preset luminous color sub-pixel and other luminous color sub-pixels is large, close to APL. Compared with the prior art of adjusting VGSP, increasing the channel width-to-length ratio of the driving transistor, increasing the gate capacitance of the driving transistor or reducing the data writing time of the light-emitting device to achieve APL, the embodiment of the present invention can meet the APL requirements without changing the circuit, screen material and the data voltage range of DDIC, with low cost and less time. At the same time, since there is no need to increase the data voltage range, the panel temperature of the luminous area can be reduced, thereby improving the panel reliability.

[0046] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 is a flow chart of a method for driving a display panel provided according to an embodiment of the present invention;

[0049] Figure 2 is a flow chart of another display panel driving method provided according to an embodiment of the present invention;

[0050] Figure 3 is a flow chart of another method for driving a display panel provided according to an embodiment of the present invention;

[0051] Figure 4 is a flow chart of another display panel driving method provided according to an embodiment of the present invention;

[0052] Figure 5 is a flow chart of another display panel driving method provided according to an embodiment of the present invention;

[0053] Figure 6is a flow chart of another method for driving a display panel provided according to an embodiment of the present invention;

[0054] Figure 7 is a schematic structural diagram of a driving device for a display panel provided according to an embodiment of the present invention;

[0055] Figure 8 is a schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0057] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0058] As mentioned in the background technology, it is easy for existing display panels to have a situation where the local peak brightness cannot meet the demand, affecting the final display effect of the display panel. The inventors found through research that the reason for this problem is that due to factors such as transmittance, polarizer transmittance, pixel luminous efficiency, and display driver chip (Display Drive Intergrated Circuit, DDIC) data voltage output capability, the APL cannot achieve a higher brightness. For example, when a higher APL is required, due to the low luminous efficiency of one / some light-emitting devices, the DDIC is required to provide a lower data voltage, and the minimum data voltage provided by the DDIC cannot meet the luminous requirements of one / some light-emitting devices, resulting in the APL of the display panel being unable to achieve a higher brightness.

[0059] In the prior art, the following methods are generally used to improve APL: taking the blue light-emitting device as an example, since the data voltage of the blue light-emitting device is the lowest, the APL requirement can be met by reducing the minimum data voltage VGSP that can be provided by DDIC; the required data voltage of the blue light-emitting device can also be increased by increasing the width-to-length ratio of the channel of the driving transistor of the blue light-emitting device, thereby achieving the required APL; the APL requirement can also be met by increasing the gate capacitance of the driving transistor of the blue light-emitting device and increasing the data voltage required for the blue light-emitting device; the required APL can also be achieved by reducing the data writing time of the blue light-emitting device, but the above methods are costly and time-consuming.

[0060] Based on the above problems, an embodiment of the present invention provides a method for driving a display panel. Figure 1 is a flow chart of a method for driving a display panel according to an embodiment of the present invention, with reference to Figure 1 , the driving methods include:

[0061] S110 , obtaining a grayscale to be displayed of each sub-pixel of the display panel.

[0062] The display panel includes a plurality of sub-pixels, and the plurality of sub-pixels may have at least three different luminous colors. Exemplarily, the display panel includes at least a blue sub-pixel, a green sub-pixel, and a red sub-pixel. The grayscale to be displayed is the grayscale that the sub-pixel is about to display.

[0063] S120, determining driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a first preset luminous color sub-pixel, and when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving data corresponding to the grayscale to be displayed are the same.

[0064] Wherein, the driving data includes a driving voltage or a register value corresponding to the driving voltage, and the local peak brightness mode can be understood as a mode in which a specific area in the display panel needs to reach the highest brightness. The first preset grayscale is less than the maximum grayscale of the display panel. The first preset luminous color sub-pixel is a sub-pixel with low luminous efficiency in the display panel. The first preset luminous color sub-pixel may include at least one sub-pixel with low luminous efficiency in the display panel. Exemplarily, the first preset luminous color sub-pixel may include a sub-pixel with low luminous efficiency, or may include two or more sub-pixels with low luminous efficiency, and the driving data provided by the DDIC cannot make the brightness of the first preset luminous color sub-pixel reach the required brightness. Exemplarily, the first preset luminous color sub-pixel includes a blue sub-pixel. The display panel also includes other luminous color sub-pixels, and the driving data provided by the DDIC can meet the brightness requirements of other luminous color sub-pixels. The grayscale to be displayed is less than the first preset grayscale, and each grayscale to be displayed corresponds to different driving data.

[0065] Specifically, when the grayscale to be displayed of the first preset luminous color sub-pixel in the sub-pixel is set to be greater than or equal to the first preset grayscale, the driving data corresponding to the grayscale to be displayed is the same, then the display brightness of each grayscale to be displayed greater than the first preset grayscale of the first preset luminous color sub-pixel is the maximum brightness of the first preset luminous color sub-pixel. When it is necessary to display the peak brightness, the first preset luminous color sub-pixel displays the maximum brightness, and the luminous brightness of other luminous color sub-pixels can be driven according to the driving data corresponding to the required luminous brightness. The brightness after the luminous brightness of the first preset luminous color sub-pixel and the luminous brightness of other luminous color sub-pixels are mixed is relatively large, close to the APL, and can basically meet the APL requirements.

[0066] S130 , driving the sub-pixels to display the gray scale to be displayed in a local peak brightness mode according to the driving data corresponding to the gray scale to be displayed.

[0067] Specifically, in the local peak brightness mode, the driving data corresponding to the grayscale to be displayed is input into the driving circuit corresponding to the first preset luminous color sub-pixel to drive the first preset luminous color sub-pixel to emit light.

[0068] The driving method of the display panel provided by the embodiment of the present invention sets the driving data corresponding to the grayscale to be displayed to be the same when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, and the driving data corresponding to the grayscale to be displayed is the driving data corresponding to the maximum brightness of the first preset luminous color sub-pixel. Therefore, when the grayscale to be displayed is greater than or equal to the first preset grayscale, the luminous brightness of the first preset luminous color sub-pixel is the maximum luminous brightness, and the mixed brightness of the light emitted by the first preset luminous color sub-pixel and other luminous color sub-pixels is large, close to APL. Compared with the prior art of adjusting VGSP, increasing the channel width-to-length ratio of the driving transistor, increasing the gate capacitance of the driving transistor or reducing the data writing time of the light-emitting device to achieve APL, the embodiment of the present invention can meet the APL requirements without changing the circuit, screen material and the data voltage range of DDIC, with low cost and less time. At the same time, since there is no need to increase the data voltage range, the panel temperature of the luminous area can be reduced, thereby improving the panel reliability.

[0069] The present embodiment is based on the above embodiment and optimizes the above embodiment, specifically S120, determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a first preset luminous color sub-pixel, and when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving data corresponding to the grayscale to be displayed is the same, is optimized as follows: determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a first preset luminous color sub-pixel, and the driving data includes a driving voltage; when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel. Figure 2 is a flowchart of another display panel driving method provided according to an embodiment of the present invention, referring to Figure 2 , the optimized display panel driving method includes:

[0070] S210 , obtaining a grayscale to be displayed of each sub-pixel of the display panel.

[0071] Specifically, this step has the same function as step S110 and will not be described in detail here.

[0072] S220, determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a first preset luminous color sub-pixel, and the driving data includes a driving voltage; when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel.

[0073] Specifically, if the brightness of the first preset luminous color sub-pixel gradually increases as the driving voltage gradually decreases, when the grayscale to be displayed is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is equal to the minimum driving voltage of the display panel.

[0074] When the grayscale to be displayed is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel, the luminous brightness of the first preset luminous color sub-pixel is the maximum luminous brightness, and other luminous color sub-pixels can be driven according to the driving voltage corresponding to the required luminous brightness. The mixed brightness of the light emitted by the first preset luminous color sub-pixel and the other luminous color sub-pixels is closer to APL.

[0075] S230 , driving the sub-pixels to display the gray scale to be displayed in a local peak brightness mode according to the driving data corresponding to the gray scale to be displayed.

[0076] Specifically, this step has the same function as step S130 and will not be described in detail here.

[0077] The driving method of the display panel provided by the embodiment of the present invention sets the driving voltage corresponding to the grayscale to be displayed to be the same when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, and the driving voltage corresponding to the grayscale to be displayed is the minimum driving voltage of the display panel. Therefore, when the grayscale to be displayed is greater than or equal to the first preset grayscale, the luminous brightness of the first preset luminous color sub-pixel is the maximum luminous brightness, and the mixed brightness of the light emitted by the first preset luminous color sub-pixel and other luminous color sub-pixels is large, close to APL. Compared with the prior art of adjusting VGSP, increasing the channel width-to-length ratio of the driving transistor, increasing the gate capacitance of the driving transistor or reducing the data writing time of the light-emitting device to achieve APL, the embodiment of the present invention can meet the APL requirements without changing the circuit, screen material and data voltage range of DDIC, with low cost and less time. At the same time, since there is no need to increase the data voltage range, the panel temperature of the luminous area can be reduced, thereby improving the panel reliability.

[0078] The present embodiment is based on the above embodiment and optimizes the above embodiment, specifically, S220, determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a first preset luminous color sub-pixel, and the driving data includes a driving voltage; when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel, is optimized as follows: determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a driving transistor and a light-emitting unit, and the driving transistor is used to provide a driving current for the light-emitting unit; the driving transistor is a P-type driving transistor, and when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel. Figure 3 is a flowchart of another display panel driving method provided according to an embodiment of the present invention, referring to Figure 3 , the optimized display panel driving method includes:

[0079] S310 , obtaining a grayscale to be displayed of each sub-pixel of the display panel.

[0080] Specifically, this step has the same function as step S210 and will not be described in detail here.

[0081] S320, determining driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a driving transistor and a light-emitting unit, the driving transistor is used to provide a driving current for the light-emitting unit; the driving transistor is a P-type driving transistor, and when the grayscale to be displayed of the first preset light-emitting color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel.

[0082] Specifically, when the driving transistor is a P-type driving transistor, the smaller the driving voltage is, the higher the luminous brightness of the first preset luminous color sub-pixel is.

[0083] S330 , driving the sub-pixel to display the gray scale to be displayed in a local peak brightness mode according to the driving data corresponding to the gray scale to be displayed.

[0084] Specifically, this step has the same function as step S230 and will not be described in detail here.

[0085] The driving method of the display panel provided by the embodiment of the present invention sets the driving voltage corresponding to the grayscale to be displayed to be the same when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, and the driving voltage corresponding to the grayscale to be displayed is the minimum driving voltage of the display panel. Therefore, when the grayscale to be displayed is greater than or equal to the first preset grayscale, the luminous brightness of the first preset luminous color sub-pixel is the maximum luminous brightness, and the mixed brightness of the light emitted by the first preset luminous color sub-pixel and other luminous color sub-pixels is large, close to APL. Compared with the prior art of adjusting VGSP, increasing the channel width-to-length ratio of the driving transistor, increasing the gate capacitance of the driving transistor or reducing the data writing time of the light-emitting device to achieve APL, the embodiment of the present invention can meet the APL requirements without changing the circuit, screen material and data voltage range of DDIC, with low cost and less time. At the same time, since there is no need to increase the data voltage range, the panel temperature of the luminous area can be reduced, thereby improving the panel reliability.

[0086] Furthermore, the first preset gray scale is smaller than the maximum gray scale of the display panel.

[0087] Specifically, if the maximum grayscale of the display panel is 255 grayscale, the first preset grayscale is a grayscale less than 255, exemplarily, the first preset grayscale is 247 grayscale, and the driving data corresponding to each grayscale between 247 grayscale and 255 grayscale are all driving data corresponding to the maximum luminous brightness of the first luminous color sub-pixel, and the luminous brightness of the first luminous color sub-pixel is the maximum luminous brightness.

[0088] The present embodiment is based on the above embodiment and optimizes the above embodiment. After the step of "determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a first preset luminous color sub-pixel, and when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving data corresponding to the grayscale to be displayed is the same", the step of "determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a second preset luminous color sub-pixel, and when the grayscale to be displayed of the second preset luminous color sub-pixel is greater than or equal to the second preset grayscale, the driving data corresponding to the grayscale to be displayed is the same and equal to the driving data corresponding to the maximum brightness of the second preset luminous color sub-pixel" is added. Figure 4 is a flowchart of another display panel driving method provided according to an embodiment of the present invention, referring to Figure 4 , the optimized display panel driving method includes:

[0089] S410 , obtaining a grayscale to be displayed of each sub-pixel of a display panel.

[0090] Specifically, this step has the same function as step S110 and will not be described in detail here.

[0091] S421, determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a first preset luminous color sub-pixel, and when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving data corresponding to the grayscale to be displayed are the same.

[0092] Specifically, this step has the same function as step S120 and will not be described in detail here.

[0093] S422. Determine the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein, the sub-pixel includes a second preset luminous color sub-pixel, and when the grayscale to be displayed of the second preset luminous color sub-pixel is greater than or equal to the second preset grayscale, the driving data corresponding to the grayscale to be displayed is the same and equal to the driving data corresponding to the maximum brightness of the second preset luminous color sub-pixel.

[0094] Specifically, when the grayscale to be displayed of the second preset luminous color sub-pixel is greater than or equal to the second preset grayscale, the driving data corresponding to the grayscale to be displayed is the same, then the display brightness of each grayscale to be displayed of the second preset luminous color sub-pixel that is greater than the second preset grayscale is the maximum brightness of the second preset luminous color sub-pixel.

[0095] When it is necessary to display peak brightness, the first preset luminous color sub-pixel and the second preset luminous color sub-pixel both display maximum brightness, which can increase the mixed brightness of light emitted by the first preset luminous color sub-pixel, the second preset luminous color sub-pixel and other luminous color sub-pixels, that is, further increase the maximum brightness of the display panel, make the maximum brightness closer to APL, and meet APL requirements.

[0096] S430 , driving the sub-pixels to display the gray scale to be displayed in a local peak brightness mode according to the driving data corresponding to the gray scale to be displayed.

[0097] Specifically, this step has the same function as step S130 and will not be described in detail here.

[0098] The driving method of the display panel provided by the embodiment of the present invention sets the grayscale to be displayed of the second preset luminous color sub-pixel to be greater than or equal to the second preset grayscale, and the driving data corresponding to the grayscale to be displayed is the same and equal to the driving data corresponding to the maximum brightness of the second preset luminous color sub-pixel. Therefore, the first preset luminous color sub-pixel and the second preset luminous color sub-pixel both display the maximum brightness, which can improve the mixed brightness of the light emitted by the first preset luminous color sub-pixel, the second preset luminous color sub-pixel and other luminous color sub-pixels, and is close to APL. Compared with the prior art of adjusting VGSP, increasing the channel width-to-length ratio of the driving transistor, increasing the gate capacitance of the driving transistor or reducing the data writing time of the light-emitting device to achieve APL, the embodiment of the present invention can meet the APL requirements without changing the circuit, screen material and the data voltage range of DDIC, with low cost and less time. At the same time, since there is no need to increase the data voltage range, the panel temperature of the luminous area can be reduced, thereby improving the panel reliability.

[0099] Optionally, the sub-pixel includes a third preset luminous color sub-pixel, and when the grayscale to be displayed of the third preset luminous color sub-pixel is greater than or equal to the third preset grayscale, the driving data corresponding to the grayscale to be displayed of each sub-pixel is the same and equal to the driving data corresponding to the maximum brightness of the third preset luminous color sub-pixel.

[0100] Specifically, when the grayscale to be displayed of the third preset luminous color sub-pixel is greater than or equal to the third preset grayscale, the driving data corresponding to the grayscale to be displayed is the same, then the display brightness of each grayscale to be displayed of the third preset luminous color sub-pixel that is greater than the third preset grayscale is the maximum brightness of the third preset luminous color sub-pixel.

[0101] When it is necessary to display peak brightness, the first preset luminous color sub-pixel, the second preset luminous color sub-pixel and the third preset luminous color sub-pixel all display maximum brightness, which can increase the mixed brightness of light emitted by the first preset luminous color sub-pixel, the second preset luminous color sub-pixel and the third preset luminous color sub-pixel, that is, further increase the maximum brightness of the display panel, make the maximum brightness closer to APL, and meet the APL requirements.

[0102] Optionally, the luminous efficiency of the third preset luminous color sub-pixel is higher than the luminous efficiency of the second preset luminous color sub-pixel, and the luminous efficiency of the second preset luminous color sub-pixel is higher than the luminous efficiency of the first preset luminous color sub-pixel;

[0103] The second preset grayscale is greater than or equal to the first preset grayscale, and the third preset grayscale is greater than or equal to the second preset grayscale.

[0104] Specifically, the first preset grayscale, the second preset grayscale and the third preset grayscale may be equal or different. For example, the first preset grayscale, the second preset grayscale and the third preset grayscale may all be equal to the maximum display grayscale of the display panel, for example, all are 255 grayscales. In addition, the second preset grayscale may be set to be greater than or equal to the first preset grayscale, and the third preset grayscale may be greater than or equal to the second preset grayscale. Since the luminous efficiency of the first preset luminous color sub-pixel is the lowest, the driving data of the first preset luminous color sub-pixel first reaches the boundary value of the driving data output by the driver chip as the brightness increases, for example, the minimum driving data is reached first, so the first preset grayscale is the smallest. If the grayscale to be displayed is less than the first preset grayscale, the driving data of the first preset luminous color sub-pixel, the second preset luminous color sub-pixel and the third preset luminous color sub-pixel do not reach the driving data boundary value of the driver chip, and different grayscales correspond to different driving data. If the grayscale to be displayed is greater than or equal to the first preset grayscale and less than the second preset grayscale, the first preset luminous color sub-pixel reaches the driving data boundary value of the driving chip, while the driving data of the second preset luminous color sub-pixel and the third preset luminous color sub-pixel do not reach the driving data boundary value of the driving chip. At this time, the first preset luminous color sub-pixel can be displayed according to the luminous brightness corresponding to the driving data boundary value, and the first preset luminous color sub-pixel displays the maximum brightness. When the mixed brightness of different sub-pixels does not meet the APL requirements, the brightness of the second preset luminous color sub-pixel and / or the third preset luminous color sub-pixel can be increased according to the APL requirements. As the grayscale increases, when it reaches the second preset grayscale, since the luminous efficiency of the second preset luminous color sub-pixel is lower than the luminous efficiency of the third preset luminous color sub-pixel, the driving data of the second preset luminous color sub-pixel reaches the boundary value first, that is, the brightness of the second preset luminous color sub-pixel cannot continue to increase, then after the second preset grayscale, the second preset luminous color sub-pixel is driven by the driving data boundary value. If the grayscale to be displayed is greater than or equal to the second preset grayscale, the first preset luminous color sub-pixel and the second preset luminous color sub-pixel both reach the driving data boundary value of the driving chip, and the first preset luminous color sub-pixel and the second preset luminous color sub-pixel both display maximum brightness. If the mixed brightness of different sub-pixels does not meet the APL requirements, the brightness of the third preset luminous color sub-pixel can be increased, that is, the driving data of the third preset luminous color sub-pixel is adjusted. When the third preset grayscale is reached, the driving data of the third preset luminous color sub-pixel reaches the boundary value, that is, the brightness of the third preset luminous color sub-pixel cannot continue to increase. After the third preset grayscale, the third preset luminous color sub-pixel is driven by the driving data boundary value.

[0105] In this embodiment, the starting grayscale of sub-pixels of different luminous colors driven by the boundary value of driving data is set according to the luminous efficiency of the sub-pixels, that is, the second preset grayscale is set to be greater than or equal to the first preset grayscale, and the third preset grayscale is greater than or equal to the second preset grayscale, so that after being driven according to the driving data, the luminous brightness of the display panel meets the APL requirements.

[0106] Optionally, the first preset light-emitting color sub-pixel includes a blue sub-pixel, the second preset light-emitting color sub-pixel includes a red sub-pixel, and the third preset light-emitting color sub-pixel includes a green sub-pixel.

[0107] The present embodiment is based on the above embodiment and optimizes the above embodiment. After the step of “determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixels include sub-pixels of a first preset luminous color, and when the grayscale to be displayed of the sub-pixels of the first preset luminous color is greater than or equal to the first preset grayscale, the driving data corresponding to the grayscale to be displayed are the same”, the step of “determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixels include sub-pixels of a first preset luminous color, and when the grayscale to be displayed of the sub-pixels of the first preset luminous color is less than the first preset grayscale, the driving data corresponding to different grayscales to be displayed are different” is added. Figure 5 is a flowchart of another display panel driving method provided according to an embodiment of the present invention, referring to Figure 5 , the optimized display panel driving method includes:

[0108] S510: Obtain the grayscale to be displayed of each sub-pixel of the display panel.

[0109] Specifically, this step has the same function as step S110 and will not be described in detail here.

[0110] S521. Determine the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a first preset luminous color sub-pixel, and the driving data includes a driving voltage; when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel.

[0111] Specifically, this step has the same function as step S120 and will not be described in detail here.

[0112] S522, determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a first preset luminous color sub-pixel, and when the grayscale to be displayed of the first preset luminous color sub-pixel is less than the first preset grayscale, the driving data corresponding to different grayscales to be displayed are different.

[0113] Specifically, when the grayscale to be displayed of the first preset luminous color sub-pixel is less than the first preset grayscale, the driving data provided by the display driving chip can meet the luminous demand of the first preset luminous color sub-pixel. At this time, the driving data corresponding to different grayscales to be displayed are different.

[0114] S530 , driving the sub-pixels to display the gray scale to be displayed in a local peak brightness mode according to the driving data corresponding to the gray scale to be displayed.

[0115] Specifically, this step has the same function as step S130 and will not be described in detail here.

[0116] In the driving method of the display panel provided in an embodiment of the present invention, when the grayscale to be displayed of the first preset luminous color sub-pixel is set to be less than the first preset grayscale, the driving data corresponding to different grayscales to be displayed are different. At this time, the driving data provided by the display driving chip can meet the luminous requirements of the first preset luminous color sub-pixel.

[0117] Optionally, determining driving data corresponding to a grayscale to be displayed in a local peak brightness mode includes:

[0118] When the grayscale to be displayed of the first preset luminous color sub-pixel is less than the first preset grayscale, the driving data corresponding to the grayscale to be displayed of the first preset luminous color sub-pixel is determined according to the driving data of the first preset luminous color sub-pixel corresponding to the binding point grayscale stored in the display panel.

[0119] Specifically, if the grayscale to be displayed of the first preset luminescent color sub-pixel is the same as the binding point grayscale stored in the display panel, the driving data corresponding to the binding point grayscale stored in the display panel is the driving data corresponding to the grayscale to be displayed of the first preset luminescent color sub-pixel; if the grayscale to be displayed of the first preset luminescent color sub-pixel is different from the binding point grayscale stored in the display panel, the driving data corresponding to the grayscale to be displayed of the first preset luminescent color sub-pixel can be determined by interpolation method based on the driving data corresponding to the two binding point grayscales adjacent to the grayscale to be displayed.

[0120] Optionally, determining driving data corresponding to a grayscale to be displayed in a local peak brightness mode includes:

[0121] When the grayscale to be displayed of the first preset luminous color sub-pixel is less than the first preset grayscale, the driving data corresponding to the grayscale to be displayed of the first preset luminous color sub-pixel is interpolated and determined according to the driving data of the first preset luminous color sub-pixel corresponding to at least two different binding point grayscales stored in the display panel.

[0122] Specifically, if the grayscale to be displayed of the first preset luminous color sub-pixel is different from the grayscale of the binding point stored in the display panel, the driving data corresponding to the grayscale to be displayed of the first preset luminous color sub-pixel can be determined by linear interpolation method according to the driving data corresponding to the two binding point grayscales adjacent to the grayscale to be displayed. Exemplarily, if the first binding point grayscale is a11, the driving data corresponding to the first binding point grayscale is b11, the second binding point grayscale is a12, the driving data corresponding to the second binding point grayscale is b12, and the first grayscale to be displayed is a1, then the driving data corresponding to the first grayscale to be displayed is b11.

[0123] This embodiment is based on the above embodiment and optimizes the above embodiment. After the step of "determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a second preset luminous color sub-pixel, and when the grayscale to be displayed of the second preset luminous color sub-pixel is greater than or equal to the second preset grayscale, the driving data corresponding to the grayscale to be displayed is the same and equal to the driving data corresponding to the maximum brightness of the second preset luminous color sub-pixel", the step of "determining the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein when the grayscale to be displayed of the second preset luminous color sub-pixel is less than the second preset grayscale, the driving data corresponding to different grayscales to be displayed are different". Figure 6 is a flowchart of another display panel driving method provided according to an embodiment of the present invention, referring to Figure 6 , the optimized display panel driving method includes:

[0124] S610: Obtain the grayscale to be displayed of each sub-pixel of the display panel.

[0125] Specifically, this step has the same function as step S410 and will not be described in detail here.

[0126] S621. Determine the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a first preset luminous color sub-pixel, and the driving data includes a driving voltage; when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel.

[0127] Specifically, this step has the same function as step S421 and will not be described in detail here.

[0128] S622. Determine the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein, the sub-pixel includes a second preset luminous color sub-pixel, and when the grayscale to be displayed of the second preset luminous color sub-pixel is greater than or equal to the second preset grayscale, the driving data corresponding to the grayscale to be displayed is the same and equal to the driving data corresponding to the maximum brightness of the second preset luminous color sub-pixel.

[0129] Specifically, this step has the same function as step S422 and will not be described in detail here.

[0130] S623, determining driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein, when the grayscale to be displayed of the second preset luminous color sub-pixel is less than the second preset grayscale, the driving data corresponding to different grayscales to be displayed are different.

[0131] Specifically, when the grayscale to be displayed of the second preset luminous color sub-pixel is less than the second preset grayscale, the driving data provided by the display driving chip can meet the luminous demand of the second preset luminous color sub-pixel. At this time, the driving data corresponding to different grayscales to be displayed are different.

[0132] S630 , driving the sub-pixels to display the gray scale to be displayed in a local peak brightness mode according to the driving data corresponding to the gray scale to be displayed.

[0133] Specifically, this step has the same function as step S430 and will not be described in detail here.

[0134] In the driving method of the display panel provided in an embodiment of the present invention, when the grayscale to be displayed of the second preset luminous color sub-pixel is set to be less than the second preset grayscale, the driving data corresponding to different grayscales to be displayed are different. At this time, the driving data provided by the display driving chip can meet the luminous requirements of the second preset luminous color sub-pixel.

[0135] Optionally, determining driving data corresponding to a grayscale to be displayed in a local peak brightness mode includes:

[0136] When the grayscale to be displayed of the second preset luminous color sub-pixel is less than the second preset grayscale, the driving data corresponding to the grayscale to be displayed of the second preset luminous color sub-pixel is determined according to the driving data of the second preset luminous color sub-pixel corresponding to the binding point grayscale stored in the display panel.

[0137] Specifically, if the grayscale to be displayed of the second preset luminescent color sub-pixel is the same as the binding point grayscale stored in the display panel, the driving data corresponding to the binding point grayscale stored in the display panel is the driving data corresponding to the grayscale to be displayed of the second preset luminescent color sub-pixel; if the grayscale to be displayed of the second preset luminescent color sub-pixel is different from the binding point grayscale stored in the display panel, the driving data corresponding to the grayscale to be displayed of the second preset luminescent color sub-pixel can be determined by interpolation method based on the driving data corresponding to the two binding point grayscales adjacent to the grayscale to be displayed.

[0138] Optionally, determining driving data corresponding to a grayscale to be displayed in a local peak brightness mode includes:

[0139] When the grayscale to be displayed of the second preset luminous color sub-pixel is less than the second preset grayscale, the driving data corresponding to the grayscale to be displayed of the second preset luminous color sub-pixel is interpolated and determined according to the driving data of the second preset luminous color sub-pixel corresponding to at least two different binding point grayscales stored in the display panel.

[0140] Specifically, if the grayscale to be displayed of the second preset luminous color sub-pixel is different from the binding point grayscale stored in the display panel, the driving data corresponding to the grayscale to be displayed of the second preset luminous color sub-pixel can be determined by linear interpolation method according to the driving data corresponding to the two binding point grayscales adjacent to the grayscale to be displayed. For example, if the third binding point grayscale is a21, the driving data corresponding to the third binding point grayscale is b21, the fourth binding point grayscale is a22, the driving data corresponding to the fourth binding point grayscale is b22, and the second grayscale to be displayed is a2, then the driving data corresponding to the second grayscale to be displayed is

[0141] Optionally, when the grayscale to be displayed of the third preset luminous color sub-pixel is less than the third preset grayscale, different driving data corresponding to different grayscales to be displayed are different.

[0142] Specifically, when the grayscale to be displayed of the third preset luminous color sub-pixel is less than the third preset grayscale, the driving data provided by the display driver chip can meet the luminous demand of the third preset luminous color sub-pixel. At this time, the driving data corresponding to different grayscales to be displayed are different.

[0143] Optionally, determining driving data corresponding to a grayscale to be displayed in a local peak brightness mode includes:

[0144] When the grayscale to be displayed of the third preset luminous color sub-pixel is less than the third preset grayscale, the driving data corresponding to the grayscale to be displayed of the third preset luminous color sub-pixel is determined according to the driving data of the third preset luminous color sub-pixel corresponding to the binding point grayscale stored in the display panel.

[0145] Specifically, if the grayscale to be displayed of the third preset luminescent color sub-pixel is the same as the binding point grayscale stored in the display panel, the driving data corresponding to the binding point grayscale stored in the display panel is the driving data corresponding to the grayscale to be displayed of the third preset luminescent color sub-pixel; if the grayscale to be displayed of the third preset luminescent color sub-pixel is different from the binding point grayscale stored in the display panel, the driving data corresponding to the grayscale to be displayed of the third preset luminescent color sub-pixel can be determined by interpolation method based on the driving data corresponding to the two binding point grayscales adjacent to the grayscale to be displayed.

[0146] Optionally, determining driving data corresponding to a grayscale to be displayed in a local peak brightness mode includes:

[0147] When the grayscale to be displayed of the third preset luminous color sub-pixel is less than the third preset grayscale, the driving data corresponding to the grayscale to be displayed of the third preset luminous color sub-pixel is interpolated and determined according to the driving data of the third preset luminous color sub-pixel corresponding to at least two different binding point grayscales stored in the display panel.

[0148] Specifically, if the grayscale to be displayed of the third preset luminous color sub-pixel is different from the binding point grayscale stored in the display panel, the driving data corresponding to the grayscale to be displayed of the third preset luminous color sub-pixel can be determined by linear interpolation method according to the driving data corresponding to the two binding point grayscales adjacent to the grayscale to be displayed. For example, if the fifth binding point grayscale is a31, the driving data corresponding to the fifth binding point grayscale is b31, the sixth binding point grayscale is a32, the driving data corresponding to the sixth binding point grayscale is b32, and the third grayscale to be displayed is a3, then the driving data corresponding to the third grayscale to be displayed is

[0149] Optionally, the driving data of the first preset luminous color sub-pixel corresponding to the binding point grayscale is determined according to the target brightness of the binding point grayscale, and the target brightness of the binding point grayscale is determined according to the target peak brightness of the local peak brightness mode.

[0150] Optionally, driving data of the second preset luminous color sub-pixel and the third preset luminous color sub-pixel corresponding to the binding point grayscale are determined according to the target brightness of the binding point grayscale, and the target brightness of the binding point grayscale is determined according to the target peak brightness of the local peak brightness mode.

[0151] Specifically, the target brightness corresponding to each binding point grayscale can be determined according to the target peak brightness of the local peak brightness mode, that is, the target brightness corresponding to the 255 grayscale and the gamma formula, wherein the gamma formula is as follows:

[0152] (x / 255)^(gamma value) = (LX / t);

[0153] Among them, x is the grayscale of the binding point, 255 is the grayscale, LX is the target brightness corresponding to the x grayscale, and t is the target brightness corresponding to the 255 grayscale.

[0154] Then, the driving data of the first preset luminous color sub-pixel, the second preset luminous color sub-pixel, and the third preset luminous color sub-pixel corresponding to the grayscale of each binding point can be determined after debugging. For example, the first preset luminous color sub-pixel is a blue sub-pixel B, the second preset luminous color sub-pixel is a red sub-pixel R, and the third preset luminous color sub-pixel is a green sub-pixel G. The specific description is as follows:

[0155] Taking two binding point grayscales as an example, first determine the target brightness corresponding to the two binding point grayscales x1 and x2, and after debugging, determine the driving data of the blue sub-pixel B, red sub-pixel R, and green sub-pixel G corresponding to the x1 grayscale and x2 grayscale, and determine the register value corresponding to the driving data:

[0156] The driving data register values ​​corresponding to R / G / B in x1 grayscale are:

[0157] R: n1, G: q1, B: c1, target brightness is LX1;

[0158] The data voltage register values ​​corresponding to R / G / B under x2 grayscale are:

[0159] R: n2, G: q2, B: c2, target brightness is LX2.

[0160] Calculate the drive data register value at 255 grayscale:

[0161] ni=n1+(n1-n2) / (x1-x2)*(255-x1);

[0162] qi=q1+(q1-q2) / (x1-x2)*(255-x1);

[0163] ci=c1+(c1-c2) / (x1-x2)*(255-x1);

[0164] Wherein, ni is the register value of the red sub-pixel at 255 grayscale, qi is the register value of the green sub-pixel at 255 grayscale, and ci is the register value of the blue sub-pixel at 255 grayscale. When the calculated register value of 255 grayscale exceeds the maximum register value, the maximum register value is directly assigned to 255 grayscale. Exemplarily, if the register value of 255 grayscale of the blue sub-pixel exceeds 4096, 4096 is directly assigned to 255 grayscale, and the first preset grayscale whose register value is equal to 4096 is calculated, then the register value of the blue sub-pixel from the first preset grayscale to 255 grayscale is 4096, that is, the driving data of the blue sub-pixel from the first preset grayscale to 255 grayscale is the driving data boundary value. After the assignment is completed, the brightness of the display panel at 255 grayscale is measured or calculated. If the brightness meets the APL requirements, the register value corresponding to the bound grayscale and the first preset grayscale are directly stored in the display panel. If the brightness does not meet the APL requirements, the register value of the red sub-pixel and / or the green sub-pixel can be adjusted to increase the brightness of the red sub-pixel and / or the green sub-pixel. For example, the register value of the red sub-pixel is set to the maximum register value between the second preset grayscale value and 255 grayscale, and the register value of the green sub-pixel is set to the maximum register value between the third preset grayscale and 255 grayscale. That is, when the second preset grayscale is set to 255, the red sub-pixel is driven using the driving data boundary value, and when the third preset grayscale is set to 255 grayscale, the green sub-pixel is driven using the driving data boundary value.

[0165] Furthermore, under different picture refresh frequencies, the driving data corresponding to the same grayscale to be displayed in the local peak brightness mode is the same.

[0166] Specifically, under different picture refresh frequencies, the same grayscale to be displayed in the local peak brightness mode is matched with the same driving data, which can reduce the driving difficulty of the display panel and reduce the data storage amount.

[0167] An embodiment of the present invention provides a driving device for a display panel. Figure 7 is a schematic diagram of a structure of a driving device for a display panel according to an embodiment of the present invention, with reference to Figure 7 , the driving device 200 comprises:

[0168] A grayscale acquisition module 210 for acquiring a grayscale for display of each sub-pixel of the display panel;

[0169] The driving data determination module 220 is used to determine the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a first preset luminous color sub-pixel, and when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving data corresponding to the grayscale to be displayed are the same;

[0170] The driving module 230 is used to drive the sub-pixels to display the gray scale to be displayed in a local peak brightness mode according to the driving data corresponding to the gray scale to be displayed.

[0171] Further, the driving data includes a driving voltage;

[0172] When the grayscale to be displayed of the first preset luminescent color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel;

[0173] Optionally, the sub-pixel includes a driving transistor and a light-emitting unit, and the driving transistor is used to provide a driving current for the light-emitting unit;

[0174] The driving transistor is a P-type driving transistor. When the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel.

[0175] Furthermore, the first preset gray scale is smaller than the maximum gray scale of the display panel.

[0176] Further, the sub-pixel includes a second preset luminous color sub-pixel, and when the grayscale to be displayed of the second preset luminous color sub-pixel is greater than or equal to the second preset grayscale, the driving data corresponding to the grayscale to be displayed is the same and equal to the driving data corresponding to the maximum brightness of the second preset luminous color sub-pixel;

[0177] Optionally, the sub-pixel includes a third preset luminous color sub-pixel, and when the grayscale to be displayed of the third preset luminous color sub-pixel is greater than or equal to the third preset grayscale, the driving data corresponding to the grayscale to be displayed of each sub-pixel is the same and equal to the driving data corresponding to the maximum brightness of the third preset luminous color sub-pixel;

[0178] Optionally, the luminous efficiency of the third preset luminous color sub-pixel is higher than the luminous efficiency of the second preset luminous color sub-pixel, and the luminous efficiency of the second preset luminous color sub-pixel is higher than the luminous efficiency of the first preset luminous color sub-pixel;

[0179] The second preset grayscale is greater than or equal to the first preset grayscale, and the third preset grayscale is greater than or equal to the second preset grayscale;

[0180] Optionally, the first preset light-emitting color sub-pixel includes a blue sub-pixel, the second preset light-emitting color sub-pixel includes a red sub-pixel, and the first preset light-emitting color sub-pixel includes a green sub-pixel.

[0181] Furthermore, when the grayscale to be displayed of the first preset luminous color sub-pixel is less than the first preset grayscale, the driving data corresponding to different grayscales to be displayed are different;

[0182] Optionally, the driving data determination module 220 is specifically used for:

[0183] When the grayscale to be displayed of the first preset luminescent color sub-pixel is less than the first preset grayscale, the driving data corresponding to the grayscale to be displayed of the first preset luminescent color sub-pixel is determined according to the driving data of the first preset luminescent color sub-pixel corresponding to the binding point grayscale stored in the display panel;

[0184] Optionally, the driving data determination module 220 is further specifically configured to:

[0185] When the grayscale to be displayed of the first preset luminescent color sub-pixel is less than the first preset grayscale, the driving data corresponding to the grayscale to be displayed of the first preset luminescent color sub-pixel is determined by interpolation according to the driving data of the first preset luminescent color sub-pixel corresponding to at least two different binding point grayscales stored in the display panel;

[0186] Optionally, the driving data of the first preset luminous color sub-pixel corresponding to the binding point grayscale is determined according to the target brightness of the binding point grayscale, and the target brightness of the binding point grayscale is determined according to the target peak brightness of the local peak brightness mode.

[0187] Furthermore, when the grayscale to be displayed of the second preset luminous color sub-pixel is smaller than the second preset grayscale, the driving data corresponding to different grayscales to be displayed are different;

[0188] Optionally, the driving data determination module 220 is further specifically configured to:

[0189] When the grayscale to be displayed of the second preset luminescent color sub-pixel is less than the second preset grayscale, the driving data corresponding to the grayscale to be displayed of the second preset luminescent color sub-pixel is determined according to the driving data of the second preset luminescent color sub-pixel corresponding to the binding point grayscale stored in the display panel;

[0190] Optionally, the driving data determination module 220 is further specifically configured to:

[0191] When the grayscale to be displayed of the second preset luminescent color sub-pixel is less than the second preset grayscale, the driving data corresponding to the grayscale to be displayed of the second preset luminescent color sub-pixel is determined by interpolation according to the driving data of the second preset luminescent color sub-pixel corresponding to at least two different binding point grayscales stored in the display panel;

[0192] Optionally, when the grayscale to be displayed of the third preset luminous color sub-pixel is less than the third preset grayscale, the driving data corresponding to different grayscales to be displayed are different;

[0193] Optionally, the driving data determination module 220 is further specifically configured to:

[0194] When the grayscale to be displayed of the third preset luminescent color sub-pixel is less than the third preset grayscale, the driving data corresponding to the grayscale to be displayed of the third preset luminescent color sub-pixel is determined according to the driving data of the third preset luminescent color sub-pixel corresponding to the binding point grayscale stored in the display panel;

[0195] Optionally, the driving data determination module 220 is further specifically configured to:

[0196] When the grayscale to be displayed of the third preset luminescent color sub-pixel is less than the third preset grayscale, the driving data corresponding to the grayscale to be displayed of the third preset luminescent color sub-pixel is determined by interpolation according to the driving data of the third preset luminescent color sub-pixel corresponding to at least two different binding point grayscales stored in the display panel;

[0197] Optionally, driving data of the second preset luminous color sub-pixel and the third preset luminous color sub-pixel corresponding to the binding point grayscale are determined according to the target brightness of the binding point grayscale, and the target brightness of the binding point grayscale is determined according to the target peak brightness of the local peak brightness mode.

[0198] Furthermore, under different picture refresh frequencies, the driving data corresponding to the same grayscale to be displayed in the local peak brightness mode is the same.

[0199] The driving device of the display panel provided in the embodiment of the present invention can execute the driving method of the display panel provided in any embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method.

[0200] Figure 8 is a schematic diagram of a display device provided by an embodiment of the present invention. The embodiment of the present invention also provides a display device, referring to Figure 8 The display device 100 includes a display panel 300 and a display panel driving device 200 according to any embodiment of the present invention. The display device 100 may be an electronic device such as a mobile phone or a tablet computer.

[0201] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0202] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for driving a display panel, characterized in that: include: Obtaining the grayscale to be displayed of each sub-pixel of the display panel; Determine the driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein the sub-pixel includes a first preset luminous color sub-pixel, and when the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving data corresponding to the grayscale to be displayed are the same; The sub-pixel is driven to display the gray scale to be displayed in a local peak brightness mode according to the driving data corresponding to the gray scale to be displayed.

2. The method for driving a display panel according to claim 1, wherein: The driving data includes a driving voltage; When the grayscale to be displayed of the first preset luminescent color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel; Preferably, the sub-pixel comprises a driving transistor and a light-emitting unit, and the driving transistor is used to provide a driving current for the light-emitting unit; The driving transistor is a P-type driving transistor. When the grayscale to be displayed of the first preset luminous color sub-pixel is greater than or equal to the first preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel.

3. The method for driving a display panel according to claim 1, wherein: The first preset gray scale is smaller than the maximum gray scale of the display panel.

4. The method for driving a display panel according to claim 1, wherein: The sub-pixel includes a second preset luminous color sub-pixel, and when the grayscale to be displayed of the second preset luminous color sub-pixel is greater than or equal to the second preset grayscale, the driving data corresponding to the grayscale to be displayed is the same and equal to the driving data corresponding to the maximum brightness of the second preset luminous color sub-pixel; Preferably, the sub-pixel includes a third preset luminous color sub-pixel, and when the grayscale to be displayed of the third preset luminous color sub-pixel is greater than or equal to the third preset grayscale, the driving data corresponding to the grayscale to be displayed of each of the sub-pixels is the same and equal to the driving data corresponding to the maximum brightness of the third preset luminous color sub-pixel; Preferably, the luminous efficiency of the third preset luminous color sub-pixel is higher than the luminous efficiency of the second preset luminous color sub-pixel, and the luminous efficiency of the second preset luminous color sub-pixel is higher than the luminous efficiency of the first preset luminous color sub-pixel; The second preset grayscale is greater than or equal to the first preset grayscale, and the third preset grayscale is greater than or equal to the second preset grayscale; Preferably, the first preset light-emitting color sub-pixel includes a blue sub-pixel, the second preset light-emitting color sub-pixel includes a red sub-pixel, and the third preset light-emitting color sub-pixel includes a green sub-pixel.

5. The method for driving a display panel according to claim 1, wherein: When the grayscale to be displayed of the first preset luminous color sub-pixel is less than the first preset grayscale, the driving data corresponding to different grayscales to be displayed are different; Preferably, the determining of the driving data corresponding to the grayscale to be displayed in the local peak brightness mode includes: When the grayscale to be displayed of the first preset luminescent color sub-pixel is less than the first preset grayscale, determining the driving data corresponding to the grayscale to be displayed of the first preset luminescent color sub-pixel according to the driving data of the first preset luminescent color sub-pixel corresponding to the binding point grayscale stored in the display panel; Preferably, the determining of the driving data corresponding to the grayscale to be displayed in the local peak brightness mode includes: When the grayscale to be displayed of the first preset luminescent color sub-pixel is less than the first preset grayscale, interpolating and determining the driving data corresponding to the grayscale to be displayed of the first preset luminescent color sub-pixel according to the driving data of the first preset luminescent color sub-pixel corresponding to at least two different binding point grayscales stored in the display panel; Preferably, the driving data of the first preset luminous color sub-pixel corresponding to the binding point grayscale is determined according to the target brightness of the binding point grayscale, and the target brightness of the binding point grayscale is determined according to the target peak brightness of the local peak brightness mode.

6. The method for driving a display panel according to claim 4, characterized in that: When the grayscale to be displayed of the second preset luminescent color sub-pixel is less than the second preset grayscale, different driving data corresponding to different grayscales to be displayed are different; Preferably, the determining of the driving data corresponding to the grayscale to be displayed in the local peak brightness mode includes: When the grayscale to be displayed of the second preset luminescent color sub-pixel is less than the second preset grayscale, determining the driving data corresponding to the grayscale to be displayed of the second preset luminescent color sub-pixel according to the driving data of the second preset luminescent color sub-pixel corresponding to the binding point grayscale stored in the display panel; Preferably, the determining of the driving data corresponding to the grayscale to be displayed in the local peak brightness mode includes: When the grayscale to be displayed of the second preset luminescent color sub-pixel is less than the second preset grayscale, the driving data corresponding to the grayscale to be displayed of the second preset luminescent color sub-pixel is determined by interpolation according to the driving data of the second preset luminescent color sub-pixel corresponding to at least two different binding point grayscales stored in the display panel; Preferably, when the grayscale to be displayed of the third preset luminous color sub-pixel is less than the third preset grayscale, the driving data corresponding to different grayscales to be displayed are different; Preferably, the determining of the driving data corresponding to the grayscale to be displayed in the local peak brightness mode includes: When the grayscale to be displayed of the third preset luminescent color sub-pixel is less than the third preset grayscale, the driving data corresponding to the grayscale to be displayed of the third preset luminescent color sub-pixel is determined according to the driving data of the third preset luminescent color sub-pixel corresponding to the binding point grayscale stored in the display panel; Preferably, the determining of the driving data corresponding to the grayscale to be displayed in the local peak brightness mode includes: When the grayscale to be displayed of the third preset luminescent color sub-pixel is less than the third preset grayscale, the driving data corresponding to the grayscale to be displayed of the third preset luminescent color sub-pixel is interpolated and determined according to the driving data of the third preset luminescent color sub-pixel corresponding to at least two different binding point grayscales stored in the display panel. Preferably, the driving data of the second preset luminous color sub-pixel and the third preset luminous color sub-pixel corresponding to the binding point grayscale are determined according to the target brightness of the binding point grayscale, and the target brightness of the binding point grayscale is determined according to the target peak brightness of the local peak brightness mode.

7. The method for driving a display panel according to claim 1, wherein: Under different picture refresh frequencies, the driving data corresponding to the same grayscale to be displayed in the local peak brightness mode is the same.

8. A driving device for a display panel, characterized in that: include: A grayscale acquisition module to be displayed, used for acquiring the grayscale to be displayed of each sub-pixel of the display panel; A driving data determination module, used to determine driving data corresponding to the grayscale to be displayed in the local peak brightness mode; wherein, when the grayscale to be displayed of the sub-pixel is greater than or equal to the preset grayscale, the driving data corresponding to the grayscale to be displayed are the same; A driving module is used to drive the sub-pixel to display the gray scale to be displayed in a local peak brightness mode according to driving data corresponding to the gray scale to be displayed.

9. The driving device of the display panel according to claim 8, characterized in that: The driving data includes a driving voltage; When the grayscale to be displayed of the sub-pixel is greater than or equal to the preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel; Preferably, the sub-pixel comprises a driving transistor and a light-emitting unit, and the driving transistor is used to provide a driving current for the light-emitting unit; The driving transistor is a P-type driving transistor. When the grayscale to be displayed of the sub-pixel is greater than or equal to a preset grayscale, the driving voltage corresponding to the grayscale to be displayed is the same and equal to the minimum driving voltage of the display panel.

10. A display device, characterized in that: A display panel and a driving device for the display panel according to any one of claims 8 to 9.

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