Display panel driving method, driving device and display device

Abstract

The present invention discloses a driving method, a driving device and a display device of a display panel. The driving method of the display panel includes: determining the initial driving data of each sub-pixel in each written frame according to the picture to be displayed; adjusting the initial driving data of at least part of the written frames in a driving cycle to obtain the final driving data; within a driving cycle, the difference between the average of the final driving data of all written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is less than a preset threshold; at least part of the written frames include the first written frame of at least two written frames; in the first written frame, the adjustment method of part of the sub-display area is different from that of other sub-display areas, or, in the first written frame, the initial driving data of part of the sub-display area is adjusted, and the initial driving data of part of the sub-display area is not adjusted; and driving the sub-pixels to display the picture to be displayed according to the final driving data. The present invention can improve the display effect of the display panel.

Description

Technical Field

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

[0002] With the rapid development of display technology, people have higher and higher requirements on the display of display panels. However, existing display panels have the problem of brightness variation during the display process, which affects the display effect of the display panel. Summary of the invention

[0003] The present invention provides a display panel driving method, a driving device and a display device to improve the display effect of the display panel.

[0004] According to one aspect of the present invention, a method for driving a display panel is provided, wherein the display panel comprises a display area, the display area comprises at least two sub-display areas, each of the sub-display areas comprises a plurality of sub-pixels; a driving cycle of the sub-pixels comprises a writing phase and a holding phase, the writing phase comprises at least two writing frames;

[0005] The driving method comprises:

[0006] Determine the initial driving data of each sub-pixel in each written frame according to the picture to be displayed;

[0007] The initial driving data of at least part of the written frames of a driving cycle are adjusted to obtain final driving data; wherein, within a driving cycle, the difference between the average of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is less than a preset threshold; the adjustment method of the initial driving data includes increasing the initial driving data and decreasing the initial driving data; the at least part of the written frames includes the first written frame of the at least two written frames; in the first written frame, the adjustment method of part of the sub-display areas is different from that of other sub-display areas, or, in the first written frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted;

[0008] The sub-pixels are driven according to the final driving data to display the picture to be displayed.

[0009] This arrangement reduces the brightness difference between the first written frame and the last maintained frame of the previous driving cycle while ensuring that the display brightness of multiple written frames is superimposed to meet the brightness of the image to be displayed, thereby improving the display effect of the display panel.

[0010] Optionally, the at least partial write frame also includes the last write frame of the at least two write frames; in the last write frame, some sub-display areas are adjusted differently from other sub-display areas, or, in the last write frame, initial drive data of some sub-display areas are adjusted, while initial drive data of some sub-display areas are not adjusted.

[0011] With this arrangement, under the premise that the display brightness of multiple written frames is superimposed to meet the brightness of the image to be displayed, the brightness difference between the writing phase and the holding phase in a driving cycle is reduced, further improving the display effect of the display panel.

[0012] Optionally, in each of the writing frames, some sub-display areas are adjusted in a different manner from other sub-display areas, or initial driving data of some sub-display areas are adjusted, while initial driving data of some sub-display areas are not adjusted.

[0013] This arrangement ensures that each written frame has a smaller brightness difference with the holding stage of the previous driving cycle and the holding stage of the current driving cycle, further improving the display effect of the display panel.

[0014] Optionally, the adjustment methods of adjacent sub-display areas in each of the written frames are different, so as to ensure that the brightness of each sub-display area in the same written frame changes alternately, while ensuring that the brightness difference with the holding stage is reduced, making the picture brightness of the written frame more uniform, and ensuring that the display panel has a better display effect.

[0015] Optionally, the plurality of sub-display areas are arranged in sequence along a row direction or a column direction, or the plurality of sub-display areas are arranged in an array.

[0016] Arranging multiple sub-display areas in sequence along the row direction or column direction reduces the driving difficulty of the display panel. Arranging multiple sub-display areas in an array ensures that the brightness difference between the writing stage and the holding stage is small, making the brightness of the written frame more uniform, and ensuring that the display panel has a better display effect.

[0017] Optionally, in the adjustment method, the value increased when the initial driving data is increased is a first value, and the value decreased when the initial driving data is decreased is a second value, and the first value and the second value are equal. This setting can reduce the difficulty of adjusting the initial driving data of the display panel and improve the driving speed.

[0018] Optionally, within a driving cycle, the average of the final driving data of all written frames corresponding to the sub-pixels in each of the sub-display areas is equal to the initial driving data. This arrangement makes the display brightness of all written frames of each sub-pixel equal to the brightness of the image to be displayed, ensuring that the display panel has a high image display accuracy.

[0019] Optionally, each of the write frames includes a light-emitting sub-phase, the hold phase includes at least two hold frames, and each of the hold frames includes a light-emitting sub-phase;

[0020] Driving the sub-pixel to display the picture to be displayed according to the final driving data includes:

[0021] The sub-pixel is driven to emit light in the light-emitting sub-stage; wherein, in the at least two writing frames, from the first writing frame to the last writing frame, the duration of the light-emitting sub-stage of each writing frame gradually increases, and the duration of the light-emitting sub-stage of the holding frame is greater than the duration of the light-emitting sub-stage of the writing frame.

[0022] This setting can reduce the brightness difference between the holding frame and the writing stage, and make the luminous duration gradually increase from the first writing frame to the last writing frame, avoiding sudden changes in the luminous duration during the holding stage, causing sudden changes in brightness.

[0023] Optionally, in the at least two holding frames, from the first holding frame to the last holding frame, the duration of the light-emitting sub-stage of at least part of the holding frames gradually increases, so that the holding frame farther away from the writing stage has a longer light-emitting duration, thereby reducing the brightness difference between the holding frame and the writing stage.

[0024] According to another aspect of the present invention, a driving device for a display panel is provided, wherein the display panel comprises a display area, the display area comprises at least two sub-display areas, each of the sub-display areas comprises a plurality of sub-pixels; a driving cycle of the sub-pixels comprises a writing phase and a holding phase, the writing phase comprises at least two writing frames;

[0025] The driving device comprises:

[0026] An initial driving data determination module, used to determine the initial driving data of each sub-pixel in each written frame according to the picture to be displayed;

[0027] A final driving data determination module is used to adjust the initial driving data of at least part of the written frames in a driving cycle to obtain the final driving data; wherein, within a driving cycle, the difference between the average of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is less than a preset threshold; the adjustment method of the initial driving data includes increasing the initial driving data and decreasing the initial driving data; the at least part of the written frames includes the first written frame of the at least two written frames; in the first written frame, the adjustment method of part of the sub-display areas is different from that of other sub-display areas, or, in the first written frame, the initial driving data of part of the sub-display areas is adjusted, and the initial driving data of part of the sub-display areas is not adjusted;

[0028] A driving module is used to drive the sub-pixel to display the picture to be displayed according to the final driving data.

[0029] According to another aspect of the present invention, a display device is provided, comprising a display panel and a driving device for the display panel according to any embodiment of the present invention.

[0030] According to an embodiment of the present invention, a display area is configured to include at least two sub-display areas, a writing stage is configured to include at least two writing frames, and initial driving data of each sub-pixel in each writing frame is determined according to a picture to be displayed; the initial driving data of at least part of the writing frames in a driving cycle are adjusted to obtain final driving data; wherein, in the first writing frame of at least part of the writing frames, the adjustment method of part of the sub-display areas is different from that of other sub-display areas, or the initial driving data of part of the sub-display areas are adjusted, while the initial driving data of part of the sub-display areas are not adjusted; so that when the sub-pixels are driven to display the picture to be displayed according to the final driving data, the brightness difference between part of the sub-display areas in the first writing frame and the last holding frame of the previous driving cycle is reduced, and by setting the difference between the average of the final driving data of all writing frames corresponding to the sub-pixels in each sub-display area and the initial driving data in a driving cycle to be less than a preset threshold, the brightness difference between the first writing frame and the last holding frame of the previous driving cycle is reduced on the premise of ensuring that the display brightness of multiple writing frames is superimposed to meet the brightness of the picture to be displayed, thereby improving the display effect of the display panel.

[0031] 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

[0032] 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.

[0033] Figure 1 It is a driving timing diagram of a display panel in the prior art;

[0034] Figure 2 is a schematic diagram of a display panel provided by an embodiment of the present invention;

[0035] Figure 3 is a flow chart of a method for driving a display panel provided by an embodiment of the present invention;

[0036] Figure 4 is a driving timing diagram of a display panel provided by an embodiment of the present invention;

[0037] Figure 5 is a schematic diagram of a writing frame provided by an embodiment of the present invention;

[0038] Figure 6 is a schematic diagram of another writing frame provided by an embodiment of the present invention;

[0039] Figure 7 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0040] Figure 8 is another driving timing diagram of a display panel provided by an embodiment of the present invention;

[0041] Fig. 9 is a schematic diagram of a driving device for a display panel provided by an embodiment of the present invention;

[0042] Fig.10 is a schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] 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.

[0044] 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 thereof 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 that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0045] As mentioned in the background technology, the existing display panel has brightness changes during display. The inventors have found through long-term research that the reason for this problem is: Figure 1 is a driving timing diagram of a display panel in the prior art, refer to Figure 1When the display panel displays an image at a relatively low image refresh rate, a driving cycle A usually includes a writing stage A1 and a holding stage A2. The writing stage A1 usually includes a writing frame, and the holding stage includes a plurality of holding frames Skip. The writing frame writes the data voltage to the driving unit, and the driving unit drives the light-emitting diode to emit light. The holding frame Skip does not write the data voltage, and the driving unit generates a driving current according to the data voltage stored in the storage unit to drive the light-emitting diode to emit light. Since the storage unit may have leakage, the data voltage stored in the storage unit will gradually decay when the holding frame Skip is held. The decay of the data voltage stored in the storage unit will cause the driving current generated by the driving unit to change, and then the brightness of the light-emitting diode will change, so that the display brightness of the display panel in the writing stage A1 and the holding stage A2 is different, that is, the brightness of the display panel will change when displaying a frame of the image, affecting the display effect of the display panel.

[0046] refer to Figure 1 In the prior art, in order to reduce the brightness difference between the write stage A1 and the hold stage A2, the write stage A1 is set to include three write frames, namely, the write frame, the (write+a) frame and the (write+a') frame. The three write frames will write drive data to the drive unit, and the drive data written by the three write frames gradually decreases. However, in the existing solution, the Write frame is the starting frame of the write stage A1 and has the highest brightness; the previous hold frame Skip of the Write frame has the lowest brightness due to the continuous leakage of the storage unit. Therefore, the existing improvement solution still has a large brightness difference between the Write frame and the previous hold frame Skip of the Write frame, and flickering and jittering are easily observed, which affects the display effect of the display panel.

[0047] In view of the above technical problems, an embodiment of the present invention provides a method for driving a display panel. Figure 2 is a schematic diagram of a display panel provided by an embodiment of the present invention, with reference to Figure 2 The display panel includes a display area 10, the display area 10 includes at least two sub-display areas 11, each sub-display area 11 includes a plurality of sub-pixels 101; a driving cycle A of the sub-pixel 101 includes a writing phase A1 and a holding phase A2, and the writing phase A1 includes at least two writing frames (writeb, writec);

[0048] Figure 3 is a flow chart of a method for driving a display panel provided by an embodiment of the present invention, with reference to Figure 3 , the driving method of the display panel includes:

[0049] S110 , determining initial driving data for each sub-pixel in each written frame according to the picture to be displayed.

[0050] Among them, the picture to be displayed is the picture to be displayed by the display panel. The display panel usually stores driving data corresponding to multiple different grayscales or multiple different brightnesses. The grayscale or brightness that each sub-pixel needs to display can be determined according to the picture to be displayed, and the initial driving data is determined according to the grayscale or brightness, and the driving data corresponding to multiple different grayscales or multiple different brightnesses stored in the display panel. Exemplarily, the display panel stores driving data corresponding to 16 grayscales, 32 grayscales, 64 grayscales, 128 grayscales and 255 grayscales. If it is determined that the grayscale to be displayed by a certain sub-pixel is 64 grayscales according to the picture to be displayed, the driving data corresponding to the 64 grayscales stored in the display panel is directly determined as the initial driving data corresponding to the sub-pixel. If it is determined that the grayscale to be displayed by a certain sub-pixel is 100 grayscales according to the picture to be displayed, the driving data corresponding to the 100 grayscales can be interpolated according to the driving data corresponding to the 64 grayscales and the driving data corresponding to the 128 grayscales stored in the display panel, and the interpolated driving data is used as the initial driving data of the sub-pixel.

[0051] S120, adjusting the initial driving data of at least part of the written frames of a driving cycle to obtain final driving data; wherein, within a driving cycle, the difference between the average of the final driving data of all written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is less than a preset threshold; the adjustment method of the initial driving data includes increasing the initial driving data and decreasing the initial driving data; at least part of the written frames includes the first written frame of at least two written frames; in the first written frame, the adjustment method of part of the sub-display areas is different from that of other sub-display areas, or, in the first written frame, the initial driving data of part of the sub-display areas is adjusted, and the initial driving data of part of the sub-display areas is not adjusted.

[0052] Specifically, the initial driving data of some written frames may be adjusted, or the initial driving data of all written frames may be adjusted. Figure 4 is a driving timing diagram of a display panel provided by an embodiment of the present invention, with reference to Figure 4 , Figure 4 Two driving cycles A are shown in FIG. 1 , and one driving cycle A corresponds to displaying one frame of an image to be displayed. Figure 4In the figure, Scan-STV_P and Scan-STV_N are scanning signals for controlling the drive data to be written into the drive unit; Vsync is the frame initialization signal, EM-STV_P is the light control signal, Source is the drive data, and Luminance is the display brightness. A write phase A1 may include two write frames or multiple write frames. Within a drive cycle A, the difference between the mean of the final drive data of all write frames corresponding to the sub-pixels in each sub-display area and the initial drive data of the sub-pixel is less than a preset threshold value, ensuring that the brightness of the superposition of multiple write frames of each sub-pixel is close to or equal to the target brightness of the image to be displayed. The preset threshold value can be set according to the display requirements of the display panel.

[0053] refer to Figure 2 and Figure 4 , the first write frame writeb is a write frame in the write phase A1 adjacent to the previous drive cycle A. The display area 10 of the display panel may include two or more sub-display areas 11. In the first write frame writeb, some sub-display areas 11 are adjusted differently from other sub-display areas 11, that is, the initial drive data of some sub-display areas 11 are reduced, and the initial drive data of some sub-display areas 11 are increased. By setting the initial drive data of some sub-display areas 11 to be reduced, when the part of the sub-display area 11 displays the picture to be displayed, the brightness difference between the first write frame writeb and the last hold frame Skip of the previous drive cycle A is reduced. Since the difference between the average of the final drive data of all write frames corresponding to the sub-pixels in each sub-display area 11 in one drive cycle A and the initial drive data is less than a preset threshold, the brightness difference between the first write frame writeb and the last hold frame Skip of the previous drive cycle A is reduced under the premise that the display brightness of multiple write frames is superimposed to meet the brightness of the picture to be displayed.

[0054] In the first write frame writeb, the initial driving data of some sub-display areas 11 are adjusted, and the initial driving data of some sub-display areas 11 are not adjusted. The initial driving data of some sub-display areas 11 may be reduced, and some sub-display areas 11 are not adjusted; the initial driving data of some sub-display areas 11 may be increased, and the initial driving data of some sub-display areas 11 are not adjusted; the initial driving data of some sub-display areas 11 may be reduced, and some sub-display areas 11 are not adjusted, and the initial driving data of some sub-display areas 11 are increased. By setting the initial driving data of the part of the sub-display area 11 of the first write frame writeb not to be adjusted, the brightness difference between the part of the sub-display area 11 and the last hold frame Skip of the previous drive cycle A is relatively reduced. Because within one drive cycle A, the difference between the average of the final driving data of all write frames corresponding to the sub-pixels 101 in each sub-display area 11 and the initial driving data is less than a preset threshold, therefore, under the premise that the display brightness of multiple write frames is superimposed to meet the brightness of the picture to be displayed, the brightness difference between the first write frame writeb and the last hold frame Skip of the previous drive cycle A is reduced.

[0055] S130 , driving sub-pixels to display the image to be displayed according to the final driving data.

[0056] That is, according to the driving timing, when each frame is written, the final driving data of the written frame is sequentially written into the sub-pixels, so that the sub-pixels can realize the display of the picture to be displayed.

[0057] According to an embodiment of the present invention, a display area is configured to include at least two sub-display areas, a writing stage is configured to include at least two writing frames, and initial driving data of each sub-pixel in each writing frame is determined according to a picture to be displayed; the initial driving data of at least part of the writing frames of a driving cycle are adjusted to obtain final driving data; wherein, in the first writing frame of at least part of the writing frames, the adjustment method of part of the sub-display areas is different from that of other sub-display areas, or the initial driving data of part of the sub-display areas are adjusted, while the initial driving data of part of the sub-display areas are not adjusted; so that when the sub-pixels are driven to display the picture to be displayed according to the final driving data, the brightness difference between part of the sub-display areas in the first writing frame and the last holding frame of the previous driving cycle is reduced, and by setting the difference between the average of the final driving data of all the writing frames corresponding to the sub-pixels in each sub-display area and the initial driving data in a driving cycle to be less than a preset threshold, the brightness difference between the first writing frame and the last holding frame of the previous driving cycle A is reduced while ensuring that the display brightness of multiple writing frames is superimposed to meet the brightness of the picture to be displayed, thereby improving the display effect of the display panel.

[0058] Optionally, at least part of the write frame also includes the last write frame of at least two write frames; in the last write frame, some sub-display areas are adjusted differently from other sub-display areas, or, in the last write frame, initial drive data of some sub-display areas are adjusted, while initial drive data of some sub-display areas are not adjusted.

[0059] refer to Figure 2 and Figure 4 , the last write frame writec is a write frame adjacent to the write stage A1 and the hold stage A2 in the current drive cycle A. In the last write frame writec, the adjustment mode of some sub-display areas 11 is different from that of other sub-display areas 11, that is, the initial drive data of some sub-display areas 11 is reduced, and the initial drive data of some sub-display areas 11 is increased. By setting the initial drive data of some sub-display areas 11 to be reduced, when the partial sub-display areas 11 display the picture to be displayed, the brightness difference between the last write frame writec and the hold stage A2 in the same drive cycle A is reduced. Since the difference between the average of the final drive data of all write frames corresponding to the sub-pixels in each sub-display area 11 and the initial drive data in one drive cycle A is less than a preset threshold value, under the premise that the display brightness of multiple write frames is superimposed to meet the brightness of the picture to be displayed, the brightness difference between the write stage A1 and the hold stage A2 in one drive cycle A is reduced, which further improves the display effect of the display panel.

[0060] In the last write frame writec, the initial drive data of some sub-display areas 11 are adjusted, and the initial drive data of some sub-display areas 11 are not adjusted. It can be that the initial drive data of some sub-display areas 11 is reduced, and some sub-display areas 11 are not adjusted; it can also be that the initial drive data of some sub-display areas 11 is increased, and the initial drive data of some sub-display areas 11 is not adjusted; it can also be that the initial drive data of some sub-display areas 11 is reduced, the initial drive data of some sub-display areas 11 is not adjusted, and the initial drive data of some sub-display areas 11 is increased. By setting the initial drive data of some sub-display areas 11 in the last write frame writec not to be adjusted, the brightness difference between the part of the sub-display area 11 and the holding stage A2 in the same drive cycle A is relatively reduced. Since the difference between the average of the final drive data of all the write frames corresponding to the sub-pixels in each sub-display area and the initial drive data in one drive cycle is less than a preset threshold value, under the premise that the display brightness of multiple write frames is superimposed to meet the brightness of the picture to be displayed, the brightness difference between the write stage A1 and the holding stage A2 in one drive cycle A is reduced, further improving the display effect of the display panel.

[0061] Optionally, in each writing frame, some sub-display areas are adjusted differently from other sub-display areas, or initial driving data of some sub-display areas are adjusted while initial driving data of some sub-display areas are not adjusted; adjacent sub-display areas are adjusted differently in each writing frame.

[0062] Specifically, in each write frame, some sub-display areas are adjusted differently from other sub-display areas, or the initial driving data of some sub-display areas are adjusted, while the initial driving data of some sub-display areas are not adjusted, so that each write frame has a smaller brightness difference with the holding stage of the previous drive cycle and the holding stage of the current drive cycle, thereby further improving the display effect of the display panel.

[0063] In addition, the adjustment methods of adjacent sub-display areas in each writing frame are set differently, that is, if the initial driving data of one sub-display area is increased, the initial driving data of the other sub-display area is reduced or remains unchanged. In this way, the brightness of each sub-display area in the same writing frame is ensured to change alternately. While ensuring that the brightness difference with the holding stage is reduced, the picture brightness of the writing frame is made more uniform, thereby ensuring that the display panel has a better display effect.

[0064] Figure 5 is a schematic diagram of a writing frame provided by an embodiment of the present invention, Figure 6 is another schematic diagram of writing a frame provided by an embodiment of the present invention, with reference to Figure 5 and Figure 6 , the display panel can be divided into two or more sub-display areas, and the initial driving data of the display panel is 200 gray levels.

[0065] Exemplary, reference Figure 5The sub-display area 11 includes a first sub-display area 111 and a second sub-display area 112. In the first writing frame, the initial driving data of the first sub-display area 111 can be increased to 202 grayscales, and the initial driving data of the second sub-display area 112 can be reduced to 198 grayscales. In the last writing frame, the initial driving data of the second sub-display area 112 can be increased to 202 grayscales, and the initial driving data of the first sub-display area 111 can be reduced to 198 grayscales. In this way, the average values ​​of the final driving data of the two writing frames of the first sub-display area 111 and the second sub-display area 112 are both 200 grayscales, and the difference with the initial driving data is less than the preset threshold value. While meeting the display requirements, the brightness difference between the first writing frame and the previous driving cycle, and the brightness difference between the last writing frame and the holding stage of the current driving cycle are reduced. In addition, the sub-display areas in the same writing frame are alternately compensated, and the brightness changes alternately. While ensuring that the brightness difference with the holding stage is reduced, the picture brightness of the writing frame is more uniform, ensuring that the display panel has a better display effect. It is understandable that the writing stage A1 in this embodiment includes two writing frames, so that the brightness of the picture of the writing frame is more uniform. Specifically, the number of writing frames in the writing stage A1 can be set according to actual conditions and is not limited here.

[0066] It can be understood that in other embodiments, the writing phase A1 includes three writing frames. In the first writing frame, the initial driving data is adjusted to decrease, in the second writing frame, the initial driving data is adjusted to increase, and in the third writing frame, the initial driving data is adjusted to decrease.

[0067] refer to Figure 6The display panel may also be divided into a plurality of sub-display areas. The sub-display area 11 includes a first sub-display area 111 , a second sub-display area 112 , a third sub-display area 113 and a fourth sub-display area 114 . In the first writing frame, the initial driving data of the first sub-display area 111 and the third sub-display area 113 can be increased to 202 grayscales, and the initial driving data of the second sub-display area 112 and the fourth sub-display area 114 can be reduced to 198 grayscales. In the last writing frame, the initial driving data of the second sub-display area 112 and the fourth sub-display area 114 can be increased to 202 grayscales, and the initial driving data of the first sub-display area 111 and the third sub-display area 113 can be reduced to 198 grayscales. In this way, the average values ​​of the final driving data of the two writing frames of the first sub-display area 111, the second sub-display area 112, the third sub-display area 113 and the fourth sub-display area 114 are both 200 grayscales, and the difference with the initial driving data is less than a preset threshold value. While meeting the display requirements, the brightness difference between the first writing frame and the previous driving cycle, as well as the brightness difference between the last writing frame and the holding stage of the current driving cycle are reduced. In addition, the sub-display areas in the same written frame are compensated alternately, and the brightness changes alternately, which ensures that the brightness difference with the holding stage is reduced, while making the picture brightness of the written frame more uniform, ensuring that the display panel has a better display effect.

[0068] Optional, Figure 7 is a schematic diagram of another display panel provided by an embodiment of the present invention, referring to Figure 2 and Figure 7 , multiple sub-display areas 11 are arranged in sequence along the row direction X or the column direction Y, or, multiple sub-display areas 11 are arranged in an array.

[0069] Specifically, the display panel also includes scan lines and data lines. The scan lines are used to provide scan signals to the sub-pixels, and the data lines are used to provide drive data to the sub-pixels. The row direction X can be the extension direction of the scan lines, and the column direction Y can be the extension direction of the data lines. Arranging multiple sub-display areas 11 in sequence along the row direction X or the column direction Y reduces the difficulty of driving the display panel. Figure 5 The multiple sub-display areas 11 may be arranged in an array along the row direction X and the column direction Y. The multiple sub-display areas 11 are arranged in an array, so that the brightness difference between the writing stage and the holding stage is small, and the brightness of the written frame is more uniform, so that the display panel has a better display effect.

[0070] Optionally, in the adjustment mode, the value increased when the initial driving data is increased is a first value, and the value decreased when the initial driving data is decreased is a second value, and the first value and the second value are equal. This setting can reduce the difficulty of adjusting the initial driving data of the display panel and improve the driving speed.

[0071] Optionally, within a driving cycle, the average of the final driving data of all written frames corresponding to the sub-pixels in each sub-display area is equal to the initial driving data. This arrangement makes the display brightness of all written frames of each sub-pixel equal to the brightness of the image to be displayed, ensuring that the display panel has a high image display accuracy.

[0072] Figure 8 is another driving timing diagram of a display panel provided by an embodiment of the present invention. Figure 8 , each writing frame includes a light-emitting sub-phase B1, the holding phase A2 includes at least two holding frames Skip, and each holding frame Skip includes a light-emitting sub-phase B1;

[0073] Driving the sub-pixels to display the image to be displayed according to the final driving data includes:

[0074] In the light-emitting sub-stage B1, the sub-pixel is driven to emit light; wherein, in at least two write frames, from the first write frame writeb to the last write frame writec, the duration of the light-emitting sub-stage B1 of each write frame gradually increases, and the duration of the light-emitting sub-stage B1 of the frame Skip is kept greater than the duration of the light-emitting sub-stage B1 of the write frame.

[0075] Specifically, the driving current and the light emission duration can both affect the display brightness of the sub-pixel. The larger the driving current, the greater the display brightness, and the longer the light emission duration, the greater the display brightness. Since the Skip frame is maintained and the driving data is not written to the sub-pixel, the driving unit in the driving circuit generates a driving current according to the data voltage stored in the storage unit to drive the light-emitting diode to emit light. Since the storage unit has leakage, the data voltage stored in the storage unit will gradually decay when the Skip frame is maintained. The decay of the data voltage stored in the storage unit will cause the driving current generated by the driving unit to decrease, resulting in a decrease in the brightness of the light-emitting diode, that is, a decrease in the display brightness of the sub-pixel. By setting the duration of the light emission sub-stage B1 of the Skip frame to be greater than the duration of the light emission sub-stage B1 of the write frame, the display brightness of the sub-pixel in the Skip frame can be increased, and the brightness difference between the Skip frame and the write stage A1 can be reduced. By setting the duration of the light emission sub-stage B1 of each write frame to gradually increase from the first write frame writeb to the last write frame writec, the light emission duration gradually increases from the first write frame writeb to the last write frame writec, thereby avoiding a sudden change in the light emission duration in the hold stage A2, resulting in a sudden brightness change.

[0076] Optionally, in at least two holding frames, from the first holding frame Skip to the last holding frame Skip, the duration of the light-emitting sub-phase B1 of at least some of the holding frames Skip gradually increases.

[0077] Specifically, within a driving cycle A, the farther away from the holding frame Skip is from the writing stage A1, the greater the attenuation of the data voltage stored in the storage unit will be, the smaller the driving current generated by the driving unit will be, and the display brightness of the sub-pixel will be smaller. The duration of the luminous sub-stage B1 of at least part of the holding frame Skip is set to gradually increase, so that the farther away from the writing stage A1, the longer the luminous duration of the holding frame Skip is, thereby reducing the brightness difference between the holding frame Skip and the writing stage A1.

[0078] The embodiment of the present invention further provides a driving device for a display panel. Fig. 9 is a schematic diagram of a driving device for a display panel provided by an embodiment of the present invention, with reference to Fig. 9 The display panel includes a display area, the display area includes at least two sub-display areas, each sub-display area includes a plurality of sub-pixels; a driving cycle of the sub-pixels includes a writing phase and a holding phase, and the writing phase includes at least two writing frames;

[0079] The drive unit includes:

[0080] An initial driving data determination module 210 is used to determine the initial driving data of each sub-pixel in each written frame according to the picture to be displayed;

[0081] The final driving data determination module 220 is used to adjust the initial driving data of at least part of the written frames in a driving cycle to obtain the final driving data; wherein, in a driving cycle, the difference between the average of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is less than a preset threshold; the adjustment method of the initial driving data includes increasing the initial driving data and decreasing the initial driving data; the at least part of the written frame includes the first written frame of at least two written frames; in the first written frame, the adjustment method of part of the sub-display area is different from that of other sub-display areas, or, in the first written frame, the initial driving data of part of the sub-display area is adjusted, and the initial driving data of part of the sub-display area is not adjusted;

[0082] The driving module 230 is used to drive the sub-pixels to display the image to be displayed according to the final driving data.

[0083] Optionally, the at least partial write frame also includes the last write frame of the at least two write frames; in the last write frame, some sub-display areas are adjusted differently from other sub-display areas, or, in the last write frame, initial drive data of some sub-display areas are adjusted, while initial drive data of some sub-display areas are not adjusted.

[0084] Optionally, in each of the writing frames, some sub-display areas are adjusted in a different manner from other sub-display areas, or initial driving data of some sub-display areas are adjusted, while initial driving data of some sub-display areas are not adjusted;

[0085] The adjacent sub-display areas in each of the writing frames are adjusted in different ways.

[0086] Optionally, the plurality of sub-display areas are arranged in sequence along a row direction or a column direction, or the plurality of sub-display areas are arranged in an array.

[0087] Optionally, in the adjustment method, the value increased when the initial driving data is increased is a first value, and the value decreased when the initial driving data is decreased is a second value, and the first value and the second value are equal.

[0088] Optionally, within a driving cycle, an average value of final driving data of all written frames corresponding to sub-pixels in each of the sub-display areas is equal to the initial driving data.

[0089] Optionally, each of the write frames includes a light-emitting sub-phase, the hold phase includes at least two hold frames, and each of the hold frames includes a light-emitting sub-phase;

[0090] Driving the sub-pixel to display the picture to be displayed according to the final driving data includes:

[0091] The sub-pixel is driven to emit light in the light-emitting sub-stage; wherein, in the at least two writing frames, from the first writing frame to the last writing frame, the duration of the light-emitting sub-stage of each writing frame gradually increases, and the duration of the light-emitting sub-stage of the holding frame is greater than the duration of the light-emitting sub-stage of the writing frame.

[0092] Optionally, in the at least two holding frames, from the first holding frame to the last holding frame, the duration of the light-emitting sub-phase of at least part of the holding frames gradually increases.

[0093] The driving device of the display panel provided in the embodiment of the present invention and the driving method of the display panel provided in any embodiment of the present invention belong to the same inventive concept and have the same beneficial effects. For technical details not detailed in this embodiment, please refer to the driving method of the display panel provided in any embodiment of the present invention.

[0094] An embodiment of the present invention further provides a display device, Fig.10 is a schematic diagram of a display device provided by an embodiment of the present invention, with reference to Fig.10 The display device 100 includes a display panel 200 and a display panel driving device 300 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.

[0095] 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.

[0096] 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: The display panel comprises a display area, the display area comprises at least two sub-display areas, each of the sub-display areas comprises a plurality of sub-pixels; a driving cycle of the sub-pixels comprises a writing phase and a holding phase, the writing phase comprises at least two writing frames; The driving method comprises: Determine the initial driving data of each sub-pixel in each written frame according to the picture to be displayed; The initial driving data of at least part of the written frames of a driving cycle are adjusted to obtain final driving data; wherein, within a driving cycle, the difference between the average of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is less than a preset threshold; the adjustment method of the initial driving data includes increasing the initial driving data and decreasing the initial driving data; the at least part of the written frames includes the first written frame of the at least two written frames; in the first written frame, the adjustment method of part of the sub-display areas is different from that of other sub-display areas, or, in the first written frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted; The sub-pixels are driven according to the final driving data to display the picture to be displayed.

2. The method according to claim 1, characterized in that: The at least partial write frame also includes the last write frame of the at least two write frames; in the last write frame, some sub-display areas are adjusted differently from other sub-display areas, or, in the last write frame, initial drive data of some sub-display areas are adjusted, while initial drive data of some sub-display areas are not adjusted.

3. The method according to claim 1, characterized in that: In each of the writing frames, some sub-display areas are adjusted in a different manner from other sub-display areas, or initial drive data of some sub-display areas are adjusted, while initial drive data of some sub-display areas are not adjusted; The adjacent sub-display areas in each of the writing frames are adjusted in different ways.

4. The method according to claim 1, characterized in that: The plurality of sub-display areas are arranged in sequence along a row direction or a column direction, or the plurality of sub-display areas are arranged in an array.

5. The method according to claim 1, characterized in that: In the adjustment method, when the initial driving data is increased, the increased value is a first value, and when the initial driving data is decreased, the decreased value is a second value, and the first value and the second value are equal.

6. The method according to claim 1, characterized in that: In one driving cycle, the average value of the final driving data of all written frames corresponding to the sub-pixels in each of the sub-display areas is equal to the initial driving data.

7. The method according to claim 1, characterized in that Each of the writing frames includes a light-emitting sub-phase, the holding phase includes at least two holding frames, and each of the holding frames includes a light-emitting sub-phase; Driving the sub-pixel to display the picture to be displayed according to the final driving data includes: The sub-pixel is driven to emit light in the light-emitting sub-stage; wherein, in the at least two writing frames, from the first writing frame to the last writing frame, the duration of the light-emitting sub-stage of each writing frame gradually increases, and the duration of the light-emitting sub-stage of the holding frame is greater than the duration of the light-emitting sub-stage of the writing frame.

8. The method according to claim 7, characterized in that: In the at least two holding frames, from the first holding frame to the last holding frame, the duration of the light-emitting sub-phase of at least part of the holding frames gradually increases.

9. A driving device for a display panel, characterized in that: The display panel comprises a display area, the display area comprises at least two sub-display areas, each of the sub-display areas comprises a plurality of sub-pixels; a driving cycle of the sub-pixels comprises a writing phase and a holding phase, the writing phase comprises at least two writing frames; The driving device comprises: An initial driving data determination module, used to determine the initial driving data of each sub-pixel in each written frame according to the picture to be displayed; A final driving data determination module is used to adjust the initial driving data of at least part of the written frames in a driving cycle to obtain the final driving data; wherein, within a driving cycle, the difference between the average of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is less than a preset threshold; the adjustment method of the initial driving data includes increasing the initial driving data and decreasing the initial driving data; the at least part of the written frames includes the first written frame of the at least two written frames; in the first written frame, the adjustment method of part of the sub-display areas is different from that of other sub-display areas, or, in the first written frame, the initial driving data of part of the sub-display areas is adjusted, and the initial driving data of part of the sub-display areas is not adjusted; A driving module is used to drive the sub-pixel to display the image to be displayed according to the final driving data.

10. A display device, characterized in that: The invention comprises a display panel and a driving device for the display panel as claimed in claim 9.

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