Driving method and device of display panel and display device

Abstract

The embodiment of the invention discloses a driving method and device of a display panel and a display device.Second display data are generated according to first display data corresponding to a display frame, the second display data comprise display data of at least two display subframes, and the display panel is driven according to the second display data. And enabling the display panel to display the display pictures of the at least two display subframes in sequence. Wherein in at least one display sub-frame, at least two sub-pixels with different gray scales correspond to different data voltages, and at least one sub-pixel does not emit light in one display sub-frame and emits light in the other display sub-frame. In the embodiment of the invention, a digital driving mode and an analog driving mode are combined, and the black frame insertion time proportion of the sub-pixels is controlled to be combined with the light-emitting brightness of the sub-pixels in the light-emitting display sub-frames, so that the display effect is improved.

Description

Technical Field

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

[0002] With the development of display technology, users have higher and higher requirements for picture display effects.

[0003] In the prior art, driving modes for display panels include digital driving modes and analog driving modes. However, both the digital driving modes and the analog driving modes have certain defects, which affect the display effect of the display panel. Summary of the invention

[0004] The present invention provides a display panel driving method and device, and a display device, so as to drive the display panel by a digital and analog hybrid driving method, thereby improving the display effect of the display panel.

[0005] In a first aspect, an embodiment of the present invention provides a method for driving a display panel, wherein the display panel includes a plurality of sub-pixels, and the driving method includes:

[0006] Generate second display data according to the first display data corresponding to the display frame, the second display data including display data of at least two display subframes; drive the display panel according to the second display data so that the display panel displays at least two display subframes in sequence;

[0007] In at least one display subframe, at least two subpixels of different grayscales correspond to different data voltages, and at least one subpixel does not emit light in one display subframe and emits light in another display subframe.

[0008] Optionally, the first display data includes a target display grayscale corresponding to a sub-pixel in a display frame, and the second display data includes data voltages corresponding to at least two display sub-frames, or target display grayscales corresponding to at least two display sub-frames;

[0009] Optionally, in the second display data, the target display grayscale corresponding to the sub-pixel in the non-luminous display sub-frame is grayscale 0; in the second display data, the data voltage corresponding to the sub-pixel in the non-luminous display sub-frame is a black state data voltage;

[0010] Optionally, in the second display data, the target display grayscale corresponding to the sub-pixel in the display sub-frame of light emission is equal to the target display grayscale of the sub-pixel in the display frame; or, in the second display data, the data voltage corresponding to the sub-pixel in the display sub-frame of light emission is the data voltage corresponding to the target display grayscale of the sub-pixel;

[0011] Optionally, in the same display sub-frame, sub-pixels of different target display grayscales correspond to different data voltages.

[0012] Optionally, generating the second display data according to the first display data corresponding to the display frame includes:

[0013] According to the number of display subframes included in the display frame, the display grayscale range of the display panel is divided into at least two gray stages; wherein the gray stage includes at least one display grayscale; wherein different gray stages correspond to different black insertion time ratios;

[0014] Determine a target gray stage to which the target display gray level belongs according to the target display gray level corresponding to the sub-pixel in the display frame;

[0015] generating second display data according to the target display grayscale and the target gray stage to which the target display grayscale belongs;

[0016] Optionally, the black insertion time ratio corresponds to a target display grayscale, and under at least a portion of the display grayscale, the black insertion time ratio is negatively correlated with the target display grayscale;

[0017] Optionally, in at least two gray stages, the black insertion time ratio is negatively correlated with the gray stage;

[0018] Optionally, according to the number of display subframes included in the display frame, the display grayscale range of the display panel is divided into at least two gray stages, including:

[0019] Determine the number of black insertion time ratios that can be combined by each display subframe according to the number of display subframes included in the display frame; divide the display grayscale range of the display panel into at least two gray stages according to the number of black insertion time ratios;

[0020] Optionally, the number of gray stages is less than or equal to the number of black insertion time ratios that can be combined by display sub-frames included in the display frame;

[0021] Optionally, the grayscale display within the gray stage is continuous;

[0022] Optionally, in different display frames, different grayscale values ​​of the same sub-pixel at the same gray stage correspond to different data voltages;

[0023] Optionally, in different display frames, different target display grayscales of the same sub-pixel may correspond to different data voltages.

[0024] Optionally, the at least two gray stages include a first gray stage and a second gray stage; the maximum grayscale of the first gray stage is less than the minimum grayscale of the second gray stage; the black insertion time ratio corresponding to the first gray stage is greater than the black insertion time ratio corresponding to the second gray stage;

[0025] Optionally, the number of grayscales included in the first gray stage is less than the number of grayscales included in the second gray stage;

[0026] Optionally, the at least two gray stages include a lowest gray stage, the lowest gray stage includes grayscale 0; the black insertion time ratio corresponding to the lowest gray stage is equal to 100%;

[0027] Optionally, the at least two gray stages include a highest gray stage, and a minimum gray scale in the highest gray stage is greater than a maximum gray scale in other gray stages;

[0028] Optionally, the black insertion time ratio corresponding to the highest gray stage is less than or equal to 20%;

[0029] Optionally, the black insertion time ratio corresponding to the highest gray stage is equal to 0.

[0030] Optionally, before dividing the display grayscale range of the display panel into at least two grayscale stages according to the number of display subframes included in the display frame, the method further includes:

[0031] Set the time ratio of each display subframe;

[0032] Optionally, the time ratio of each display subframe is adjustable.

[0033] Optionally, the first display data further includes a target brightness level corresponding to the display frame, and before dividing the display grayscale range of the display panel into at least two gray stages according to the number of display subframes included in the display frame, further includes:

[0034] Determining the number of types of black insertion time ratios required within a display grayscale range of the display panel according to a target display brightness level;

[0035] Determine the target number of display subframes according to the number of types of black insertion time ratios;

[0036] Divide a display frame into a target number of display subframes;

[0037] Optionally, the number of types of black insertion time ratios required at the first brightness level is greater than the number of types of black insertion time ratios required at the second brightness level; and the first brightness level is lower than the second brightness level.

[0038] Optionally, sub-pixels of different gray levels correspond to different data voltages.

[0039] Optionally, the sub-pixel includes a pixel circuit and a light-emitting module, and the pixel circuit includes a data writing module and a driving module;

[0040] The data writing module is used to write the target data voltage corresponding to the sub-pixel in the second display data to the control terminal of the driving module, and the driving module is used to generate a driving current according to the target data voltage to drive the light-emitting module;

[0041] Optionally, the pixel circuit further includes a light emitting control module, and the light emitting control module is used to control the connection state between the driving module and the light emitting module; and the driving method further includes:

[0042] The black insertion time ratio of the sub-pixel in the display frame is controlled by controlling the conduction time ratio of the light emitting control module in the display frame.

[0043] In a second aspect, an embodiment of the present invention further provides a driving device for a display panel, wherein the display panel includes a plurality of sub-pixels, and the driving device includes:

[0044] A generating module, configured to generate second display data according to first display data corresponding to a display frame, wherein the second display data includes display data of at least two display subframes;

[0045] A driving module, used for driving the display panel according to the second display data, so that the display panel displays at least two display sub-frames in sequence;

[0046] In at least one display subframe, at least two subpixels of different grayscales correspond to different data voltages, and at least one subpixel does not emit light in one display subframe and emits light in another display subframe.

[0047] In a third aspect, an embodiment of the present invention further provides a display device, comprising the driving device of the display panel of the second aspect or driven by the driving method of the display panel of the first aspect.

[0048] The embodiment of the present invention provides a driving method and device for a display panel, and a display device, by generating second display data according to first display data corresponding to a display frame, the second display data includes display data of at least two display subframes, and driving the display panel according to the second display data, so that the display panel sequentially displays the display pictures of at least two display subframes. Among them, in at least one display subframe, the data voltages corresponding to at least two subpixels of different grayscales are different, and at least one subpixel does not emit light in one display subframe and emits light in another display subframe. In the embodiment of the present invention, the digital driving mode is combined with the analog driving mode, and the black insertion time ratio of the subpixel is controlled and combined with the luminous brightness of the subpixel in the luminous display subframe, which is conducive to improving the display effect. Due to the existence of black insertion, when displaying the same grayscale, the display brightness of the subpixel needs to be increased relative to the display mode without black insertion, so that the subpixel displays the same grayscale at a higher display brightness, and for the display of low grayscale, the display brightness is improved, and the display effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a flow chart of a method for driving a display panel provided by an embodiment of the present invention;

[0050] Figure 2It is a driving schematic diagram of driving a display panel using an analog driving method in the related art;

[0051] Figure 3 is a driving schematic diagram of a display panel driven by a display panel driving method according to an embodiment of the present invention;

[0052] Figure 4 is a flow chart of another display panel driving method provided by an embodiment of the present invention;

[0053] Figure 5 It is a schematic diagram of the corresponding relationship between the gray stage and the black insertion time ratio;

[0054] Figure 6 is a schematic diagram of the structure of a sub-pixel provided by an embodiment of the present invention;

[0055] Figure 7 is a schematic diagram of the structure of another sub-pixel provided by an embodiment of the present invention;

[0056] Figure 8 is a schematic diagram of the structure of another sub-pixel provided by an embodiment of the present invention;

[0057] Fig. 9 It is a schematic structural diagram of a driving device for a display panel provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0058] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0059] An embodiment of the present invention provides a method for driving a display panel, wherein the display panel includes a plurality of sub-pixels. Figure 1 is a flow chart of a method for driving a display panel provided by an embodiment of the present invention, with reference to Figure 1 , the driving method of the display panel includes:

[0060] Step 110 : Generate second display data according to the first display data corresponding to the display frame, where the second display data includes display data of at least two display sub-frames.

[0061] Specifically, in the embodiment of the present invention, a digital driving mode is introduced, and a display frame of the display panel includes at least two display subframes, and the duration of each display subframe is shorter than the total duration of the display frame. Figure 2 is a driving schematic diagram of a display panel driven by an analog driving method in the related art, Figure 2The horizontal axis t represents time, and the vertical axis Row represents the sub-pixel row of the display panel, where Row1 represents the first row of sub-pixels, and Row2160 represents the 2160th row of sub-pixels, which is also the last row of sub-pixels in the display panel. Figure 2 In the analog driving mode, the display panel is scanned once in a display frame H0, wherein the display frame H0 may include a scanning phase HC and a blank area BL. Figure 3 is a driving schematic diagram of a display panel driven by a display panel driving method according to an embodiment of the present invention, Figure 3 The horizontal axis t represents time, and the vertical axis Row represents the sub-pixel row of the display panel, where Row1 represents the first row of sub-pixels, and Row2160 represents the 2160th row of sub-pixels, which is also the last row of sub-pixels in the display panel. Figure 3 When the display panel driving method of the embodiment of the present invention is used to drive the display panel, one display frame is divided into at least two display sub-frames, and the display panel is scanned in each display sub-frame. Therefore, the display panel is scanned at least twice in one frame. Figure 3 The case where one display frame H0 includes three display sub-frames (the three display sub-frames are H1 , H2 and H3 ) is schematically shown.

[0062] In this step, by processing the first display data corresponding to the entire display frame, the second display data including the display data of at least two display subframes is obtained. Optionally, the first display data includes the display data corresponding to each subpixel in the display frame, and the second display data includes the display data corresponding to each subpixel in at least two display subframes. By processing the first display data, the display data corresponding to the subpixel in the display subframe is generated, so that the subpixel can be driven according to the display data corresponding to the subpixel in the display subframe.

[0063] Step 120: driving the display panel according to the second display data, so that the display panel displays at least two display sub-frames in sequence.

[0064] Specifically, in this step, corresponding driving data may be provided to the sub-pixels in each display sub-frame according to the second display data, so as to control the display panel to display the display picture corresponding to the display sub-frame. Optionally, the driving data may be a data voltage.

[0065] In at least one display subframe, at least two subpixels of different grayscales correspond to different data voltages, and at least one subpixel does not emit light in one display subframe and emits light in another display subframe.

[0066] Optionally, the two different grayscales may correspond to the grayscale of a display frame, or may correspond to the grayscale of a display subframe. In some embodiments, subpixels of different grayscales correspond to different data voltages.

[0067] Thus, in the embodiment of the present invention, a display frame including a plurality of display subframes is set in a digital driving mode, and in combination with an analog driving mode, by providing a corresponding data voltage to a subpixel in a display subframe, the luminous brightness of the subpixel in the display subframe can also be controlled. In addition, at least one subpixel does not emit light in one display subframe and emits light in another display subframe, so that black insertion control of the subpixel can be achieved. In the embodiment of the present invention, the digital driving mode is combined with the analog driving mode, and the black insertion time ratio of the subpixel is controlled and combined with the luminous brightness of the display subframe in which the subpixel emits light, which is conducive to improving the display effect.

[0068] The driving method of the display panel of this embodiment generates second display data according to the first display data corresponding to the display frame, and the second display data includes display data of at least two display subframes. The display panel is driven according to the second display data, so that the display panel sequentially displays the display pictures of at least two display subframes. Among them, in at least one display subframe, the data voltages corresponding to at least two subpixels of different grayscales are different, and at least one subpixel does not emit light in one display subframe and emits light in another display subframe. In the embodiment of the present invention, the digital driving method is combined with the analog driving method, and the black insertion time ratio of the subpixel is controlled and combined with the luminous brightness of the subpixel in the luminous display subframe, which is conducive to improving the display effect. Due to the existence of black insertion, when displaying the same grayscale, the display brightness of the subpixel needs to be increased relative to the display method without black insertion, so that the subpixel displays the same grayscale at a higher display brightness, and for the display of low grayscale, the display brightness is improved, and the display effect is improved.

[0069] Optionally, the first display data includes a target display grayscale corresponding to a sub-pixel in a display frame, and the second display data includes data voltages corresponding to at least two display sub-frames, or target display grayscales corresponding to at least two display sub-frames.

[0070] In a display frame, each sub-pixel corresponds to a target display grayscale. Depending on the target picture, the target display grayscales corresponding to different sub-pixels may be the same or different. The sub-pixels are displayed at their respective corresponding target display grayscales, so that the display panel can display the corresponding target picture in the display frame. Optionally, the correspondence between the target display grayscale and the target luminous state corresponding to the sub-pixel in each display sub-frame is pre-set and stored, and then the target luminous state corresponding to the sub-pixel in each display sub-frame is determined based on the target display grayscale and the above correspondence. Among them, the target luminous state may include a black state and a bright state. In the black state, the sub-pixel does not emit light; in the bright state, the sub-pixel emits light. In some optional embodiments of the present invention, the corresponding target black insertion time ratio is determined according to the target display grayscale corresponding to the sub-pixel; and the target luminous state of the sub-pixel in each display sub-frame is determined according to the target black insertion time ratio. Optionally, based on the target display grayscale corresponding to the sub-pixel and the target luminous state within the display sub-frame, a corresponding target data voltage is provided to the sub-pixel within the display sub-frame to control the black insertion time ratio of the sub-pixel within a display frame and the luminous brightness of the sub-pixel within the display sub-frame.

[0071] In some embodiments, in the second display data, the target display grayscale corresponding to the non-luminous (dark state) display subframe of the subpixel is 0 grayscale; in the second display data, the data voltage corresponding to the non-luminous display subframe of the subpixel is a black state data voltage.

[0072] In some embodiments, the target display grayscale corresponding to the sub-pixel in the luminous (bright state) display subframe is equal to the target display grayscale of the sub-pixel in the display frame; or, in the second display data, the data voltage corresponding to the sub-pixel in the luminous display subframe is the data voltage corresponding to the target display grayscale of the sub-pixel.

[0073] Optionally, in the same display sub-frame, sub-pixels with different target display grayscales have different corresponding data voltages. In this way, it can be ensured that in the same display sub-frame, sub-pixels with different target display grayscales have different corresponding brightness, and then by controlling the black insertion time ratio of the sub-pixels in the display frame and controlling the luminous brightness in the luminous display sub-frame, the display of the target display grayscale corresponding to the display frame is achieved.

[0074] Specifically, the target data voltage provided to the sub-pixel in the display sub-frame corresponds to the target light-emitting state in the display sub-frame, and when the target light-emitting state of the sub-pixel in the display sub-frame is bright, the target data voltage also corresponds to the target display grayscale. By providing the corresponding target data voltage to the sub-pixel in the display sub-frame, the light-emitting state of the sub-pixel in the display sub-frame can be controlled, and then the light-emitting duration of the sub-pixel in a display frame can be controlled to achieve the control of the black insertion time ratio of the sub-pixel in a display frame. Among them, the black insertion time refers to the time when the sub-pixel does not emit light. The black insertion time ratio can be equal to the ratio of the time when the sub-pixel does not emit light in the display frame to the total time of the display frame. In addition, in the embodiment of the present invention, in combination with the analog driving method, by providing the corresponding target data voltage to the sub-pixel in the display sub-frame, the light-emitting brightness of the sub-pixel in the display sub-frame can also be controlled. In this embodiment, by combining digital driving with analog driving, the brightness corresponding to the sub-pixel in the bright state display sub-frame under different target display grayscales can be different, which is more conducive to grayscale expansion.

[0075] Figure 4 is a flowchart of another display panel driving method provided by an embodiment of the present invention, referring to Figure 4 , the driving method of the display panel includes:

[0076] Step 210 : Divide the display grayscale range of the display panel into at least two grayscale stages according to the number of display subframes included in the display frame.

[0077] The gray stage includes at least one display gray scale; and different gray stages correspond to different black insertion time ratios.

[0078] Optionally, the black insertion time ratio corresponds to the target display grayscale. Under at least a portion of the display grayscale, the black insertion time ratio is negatively correlated with the target display grayscale, that is, under at least a portion of the display grayscale, the larger the target display grayscale, the smaller the black insertion time ratio. It is precisely because in this embodiment, through the driving mode of combining digital driving with analog driving, the target data voltage in the display subframe is set to correspond to the target display grayscale, so that under different target display grayscales, the target light-emitting state of the subpixel can correspond to different target data voltages when it is in a bright state, and accordingly, the light-emitting brightness of the subpixel can be different. In this way, under at least a portion of the display grayscale, when the target display grayscale is larger and the black insertion time ratio is smaller, different grayscale displays can still be achieved. Furthermore, by setting the black insertion time ratio to be smaller for a target display gray scale under at least part of the display gray scale, it can be achieved that within one display frame, the black insertion time ratios corresponding to low gray scale and high gray scale are different. On the one hand, it can ensure that black insertion can be performed normally at low gray scale, thereby ensuring the display effect at low gray scale; on the other hand, it can ensure that the black insertion time ratio at high gray scale is smaller or no black insertion is performed, and the brightness of the sub-pixel at high gray scale will not be too high, so that the voltage output range of the driver chip will not be too large, thereby reducing the requirements on the driver chip and ensuring the display effect of the display panel at high gray scale.

[0079] Optionally, the black insertion time ratio is negatively correlated with the gray stage, that is, the larger the display grayscale included in the gray stage, the smaller the black insertion time ratio. Exemplarily, at least two gray stages include a first gray stage and a second gray stage; the maximum grayscale of the first gray stage is less than the minimum grayscale of the second gray stage; the black insertion time ratio corresponding to the first gray stage is greater than the black insertion time ratio corresponding to the second gray stage. In this way, it can be achieved that the black insertion time ratio is negatively correlated with the target display grayscale under at least part of the display grayscale. Optionally, the display grayscale within the gray stage is continuous.

[0080] Optionally, the number of grayscales included in the first gray stage is smaller than the number of grayscales included in the second gray stage.

[0081] Specifically, compared with high grayscale, human eyes are extremely sensitive to brightness changes at low grayscale, so at low grayscale, changes in the black insertion time ratio have a great impact on the brightness perceived by the human eye. In this embodiment, the number of grayscales included in the first gray stage is set to be smaller than the number of grayscales included in the second gray stage, so that the number of grayscales included in the gray stage corresponding to the low grayscale range is relatively small, and the number of grayscales included in the gray stage corresponding to the high grayscale range is relatively large. Accordingly, a black insertion time ratio corresponds to a small number of grayscales in the low grayscale range and a large number of grayscales in the high grayscale range. In this way, the low grayscale can be more accurately expanded to ensure a good display effect at low grayscale.

[0082] Optionally, the at least two gray stages include a lowest gray stage, the lowest gray stage includes gray scale 0, and the black insertion time ratio corresponding to the lowest gray stage is equal to 100%. In this way, it can be achieved that the sub-pixel does not emit light at gray scale 0.

[0083] Optionally, at least two gray stages include a highest gray stage, the minimum gray scale in the highest gray stage is greater than the maximum gray scale in other gray stages; the black insertion time ratio corresponding to the highest gray stage is less than or equal to 20%. In this way, the brightness of the sub-pixel at a high gray scale will not be too high, further reducing the requirements for the driver chip and ensuring the display effect. In some optional embodiments of the present invention, the black insertion time ratio corresponding to the highest gray stage is equal to 0.

[0084] In some optional embodiments of the present invention, the number of black insertion time ratios that can be combined by each display subframe can be determined according to the number of display subframes included in the display frame; the display grayscale range of the display panel is divided into at least two grayscale stages according to the number of black insertion time ratios. For example, for a binary display panel, the number of black insertion time ratios that can be combined by n display subframes is equal to 2 n For example, when the number of display subframes included in the display frame is 3, the number of black insertion time ratios that can be combined by each display subframe is equal to 8. Table 1 shows 8 situations of black insertion time ratios that can be combined when the number of display subframes included in the display frame is 3 (display subframe 1, display subframe 2 and display subframe 3).

[0085] Table 1

[0086]

[0087]

[0088] Refer to Table 1, where Level 1-Level 8 represent 8 different black insertion time ratios, and the black insertion time ratio decreases gradually from Level 1 to Level 8. 0 represents that the sub-pixel does not emit light in the display sub-frame (that is, the target light-emitting state of the sub-pixel in the display sub-frame is a black state), and 1 represents that the sub-pixel emits light in the display sub-frame (that is, the target light-emitting state of the sub-pixel in the display sub-frame is a bright state).

[0089] After the number of black insertion time ratios that can be combined by each display subframe is determined, the display grayscale range of the display panel can be divided into at least two gray stages according to the number of black insertion time ratios, and then the luminous state of each display subframe corresponding to each gray stage can be set, that is, the correspondence between the gray stage and the luminous state of each display subframe. In some optional implementations of the present invention, the number of gray stages is less than or equal to the number of black insertion time ratios that can be combined by the display subframes included in the display frame. In this way, different black insertion time ratios can be provided in different gray stages, which is more conducive to grayscale development. Figure 5 It is a schematic diagram of the corresponding relationship between the gray stage and the black insertion time ratio, where Figure 5 In the figure, the number of gray stages is equal to the number of black insertion time ratios. The grayscale ranges corresponding to the 8 gray stages are G0 (0 grayscale), G1-G8 (1-8 grayscale), G9-G24 (9-24 grayscale), G25-G48 (25-48 grayscale), G49-G80 (49-80 grayscale), G81-G128 (81-128 grayscale), G129-G172 (129-172 grayscale), and G173-G255 (173-255 grayscale).

[0090] Step 220 : Determine the target gray stage to which the target display gray scale belongs according to the target display gray scale corresponding to the sub-pixel in the display frame.

[0091] The target display grayscale is greater than or equal to the minimum grayscale in the target gray stage, and less than or equal to the maximum grayscale in the target gray stage. Figure 5 Taking the gray stage as an example, the target gray stage to which gray scale 64 belongs is the gray stage corresponding to gray scales G49-G80, and the target gray stage to which gray scale 150 belongs is the gray stage corresponding to gray scales G128-G172.

[0092] Step 230 : Generate second display data according to the target display grayscale and the target gray stage to which the target display grayscale belongs.

[0093] Optionally, step 230 includes determining a display subframe in which the subpixel emits light and a display subframe in which the subpixel does not emit light according to the gray stage to which the target display grayscale corresponding to the subpixel in the display frame belongs, and determining a target data voltage corresponding to the display subframe in which the subpixel emits light according to the target display grayscale corresponding to the subpixel in the display frame. The target data voltage corresponding to the display subframe in which the subpixel does not emit light is a black state data voltage. The target data voltage corresponding to the display subframe in which the subpixel emits light is equal to the data voltage corresponding to the target display grayscale.

[0094] By dividing the display grayscale range of the display panel into at least two grayscale stages, and determining the target grayscale stage to which the target display grayscale of the sub-pixel belongs, and then determining the luminous state of each display sub-frame corresponding to the target grayscale stage as the target luminous state of each display sub-frame corresponding to the target display grayscale of the sub-pixel, and then determining the luminous display sub-frame and the non-luminous display sub-frame of the sub-pixel, the same grayscale stage can correspond to the same luminous state of each display sub-frame, that is, to the same black insertion time ratio, and different grayscale stages correspond to different luminous states of each display sub-frame, that is, to different black insertion time ratios. In addition, the technical solution of this embodiment does not need to set different black insertion time ratios for each target display grayscale, so that the number of display sub-frames divided by the display frame can be smaller, thereby reducing the number of scans of the display panel and reducing the driving power consumption of the display panel.

[0095] When the target luminous state corresponding to the sub-pixel in the display sub-frame is bright, the target data voltage corresponding to the target display grayscale is provided to the sub-pixel in the display sub-frame. Similar to the analog driving method, when different sub-pixels correspond to different target display grayscales in the same luminous display sub-frame, the target data voltages corresponding to the sub-pixels are different. Table 2 shows the grayscale range when the display frame includes 3 display sub-frames. Figure 5 In the eight gray stages shown, at eight different black insertion time ratios, the data voltages provided to the sub-pixels in three display sub-frames are respectively shown.

[0096] Table 2

[0097] Display subframe 1 Display subframe 2 Display subframe 3 Level 1 Data0 Data0 Data0 Level2 Data0 Data0 Data(G1-G8) Level3 Data0 Data(G9-G24) Data0 Level 4 Data0 Data(G25-G48) Data(G25-G48) Level 5 Data(G49-G80) Data0 Data0 Level 6 Data(G81-G128) Data0 Data(G81-G128) Level7 Data(G129-G172) Data(G129-G172) Data0 Level8 Data(G173-G255) Data(G173-G255) Data(G173-G255)

[0098] Refer to Table 2, where Data0 represents the black state data voltage. Data (G1-G8) represents the data voltage of grayscale 1 to grayscale 8, Data (G9-G24) represents the data voltage of grayscale 9 to grayscale 24, Data (G25-G48) represents the data voltage of grayscale 25 to grayscale 48, Data (G49-G80) represents the data voltage of grayscale 49 to grayscale 80, Data (G81-G128) represents the data voltage of grayscale 81 to grayscale 128, Data (G129-G172) represents the data voltage of grayscale 129 to grayscale 172, and Data (G173-G255) represents the data voltage of grayscale 173 to grayscale 255. For any black insertion time ratio, if the target luminous state corresponding to the sub-pixel in a certain display sub-frame is a bright state, and the target display grayscale is a p grayscale, then in the sub-frame where the target luminous state is a bright state, the second target data voltage provided to the sub-pixel is a data voltage DataGp corresponding to the p grayscale, where 1≤p≤255; if the target luminous state corresponding to the sub-pixel in a certain display sub-frame is a black state, then the black state data voltage Data0 is provided to the sub-pixel in the display sub-frame. Taking the black insertion time ratio Level2 as an example, if the target display grayscale of the sub-pixel is 6 grayscale, then in the display sub-frame 3 where the target luminous state is a bright state, the data voltage DataG6 corresponding to 6 grayscale is provided to the sub-pixel; in the display sub-frame 1 and the display sub-frame 2 where the target luminous state is a black state, the black state data voltage Data0 is provided to the sub-pixel.

[0099] Step 240: drive the display panel according to the second display data, so that the display panel displays at least two display sub-frames in sequence.

[0100] On the basis of the above embodiments, optionally, in the above embodiments, before step 110 and step 210, it further includes: setting the time ratio of each display subframe. Specifically, the time ratio of each display subframe can be set according to the display effect required by the display panel. Optionally, the time ratio of each display subframe is adjustable. By adjusting the time ratio of each display subframe, the display grayscale of the subpixel is adjusted to ensure that the display panel meets the brightness or chromaticity requirements. In some optional embodiments of the present invention, the time ratio of each display subframe can be the same as the existing digital driving method, for example, it can be 2 0 :2 1 :2 2 :……:2 m , where m represents the number of display subframes included in the display frame. In another optional embodiment of the present invention, the time ratio of each display subframe can be other ratios, and the present invention does not limit the time ratio of each display subframe.

[0101] Based on the above embodiments, optionally, the first display data also includes a target brightness level corresponding to the display frame. Before the above steps 110 and 210, it also includes: determining the number of types of black insertion time ratios required within the display grayscale range of the display panel according to the target display brightness level; determining the target number of display subframes according to the number of types of black insertion time ratios; and dividing a display frame into the target number of display subframes.

[0102] Specifically, display devices such as mobile phones and computers usually include a brightness adjustment button, through which the user adjusts the overall display brightness of the display device. Each touch of the brightness adjustment button corresponds to an input display brightness level. Each display brightness level may correspond to a display brightness of the maximum gray scale in the display panel. When the display brightness corresponding to the maximum gray scale in the display panel changes, the display brightness corresponding to other gray scales will also change. Specifically, when the display brightness corresponding to the maximum gray scale in the display panel increases, the display brightness corresponding to other gray scales also increases; when the display brightness corresponding to the maximum gray scale in the display panel decreases, the display brightness corresponding to other gray scales also decreases.

[0103] The larger the display grayscale range of the display panel, the more types of black insertion time ratios are required. In this embodiment, the target number of display subframes determined should satisfy that the number of types of black insertion time ratios combined by each display subframe is greater than or equal to the number of types of black insertion time ratios required within the display grayscale range of the display panel. Exemplarily, when the display grayscale range of the display panel is 0-255 grayscales, the number of types of black insertion time ratios required is 8, and the target number of display subframes can be determined as 3; when the display grayscale range of the display panel is 0-1023 grayscales, the number of types of black insertion time ratios required is 30, and the target number of display subframes can be determined as 5.

[0104] Optionally, the number of types of black insertion time ratios required at the first brightness level is greater than the number of types of black insertion time ratios required at the second brightness level; the first brightness level is lower than the second brightness level. In this way, the lower the brightness level, the more types of black insertion time ratios are required, which is conducive to low grayscale development and improves display effects.

[0105] Figure 6 is a schematic diagram of a sub-pixel structure provided by an embodiment of the present invention, referring to Figure 7Optionally, the sub-pixel includes a pixel circuit and a light-emitting module 500, and the pixel circuit includes a data writing module 410 and a driving module 420; the data writing module 410 is used to write the target data voltage corresponding to the sub-pixel in the second display data to the control terminal of the driving module 420, and the driving module 420 is used to generate a driving current according to the target data voltage to drive the light-emitting module 500. Optionally, the pixel circuit also includes a holding module 430, and the storage module 430 is electrically connected to the control terminal of the driving module 420, and is used to store the voltage of the control terminal of the driving module 420.

[0106] Figure 6 The sub-pixel structure shown in the figure has a smaller number of modules included in the pixel circuit. Accordingly, the number of circuit devices included in the pixel circuit is smaller, and the pixel circuit can be applied to display panels with high pixel density, for example, display devices in the fields of virtual reality (VR) technology, augmented reality (AR) technology, holographic projection, etc. Figure 6 The display panel with the sub-pixel structure shown is driven by the display panel driving method of the embodiment of the present invention, which can ensure good display effects at low grayscales, while the brightness at high grayscales will not be too high, thereby reducing the requirements for the driving chip and ensuring the display effects at high grayscales.

[0107] In the above embodiment of the present invention, the light emitting state of the sub-pixel in the display sub-frame is controlled only by the data voltage, thereby controlling the black insertion time ratio of the sub-pixel in a display frame. In other optional embodiments of the present invention, for the sub-pixel including the light emitting control module in the pixel circuit, the black insertion time ratio of the sub-pixel in a display frame can be further controlled by combining the on-time control of the light emitting control module.

[0108] Figure 7 is a schematic diagram of the structure of another sub-pixel provided by an embodiment of the present invention, Figure 8 is a schematic diagram of the structure of another sub-pixel provided by an embodiment of the present invention, referring to Figure 7 and Figure 8 Optionally, the pixel circuit further includes a light emitting control module 440, a control end of the light emitting control module 440 is connected to the light emitting control signal EM, and the light emitting control module 440 is used to control the connection state between the driving module 420 and the light emitting module 500; Figure 8, the light control module 440 may include a first light control unit 441 and a second light control unit 442, the first light control unit 441 is connected between the first power line VDD and the first end of the driving module 420, and the second light control unit 442 is connected between the second end of the driving module 420 and the light emitting module 500. The pixel circuit may also include a compensation module 450, a first initialization module 460 and a second initialization module 470, the compensation module 450 is connected between the control end and the second end of the driving module 420, and is used to perform threshold compensation on the driving module 420; the first initialization module 460 is electrically connected to the control end of the driving module 420, and is used to initialize the control end of the driving module 420; the second initialization module 470 is electrically connected to the light emitting module 500, and is used to initialize the light emitting module 500.

[0109] Optionally, the driving method further includes: controlling the black insertion time ratio of the sub-pixel in the display frame by controlling the on time ratio of the light emitting control module 440 in the display frame.

[0110] Specifically, by controlling the on-time ratio of the light emitting control module 440 in a display frame, the black insertion time ratio corresponding to the sub-pixel in a display frame can be further controlled. Exemplarily, in a display sub-frame where the target light emitting state is bright, by controlling the light emitting control module 440 to be turned off for part of the time in the display sub-frame, the black insertion time ratio can be reduced relative to the pixel circuit without the light emitting control module 440. In this embodiment, on the basis of digital and analog hybrid driving, the black insertion time ratio of the sub-pixel in the display frame is further controlled in combination with the control of the light emitting control module 440, which is beneficial to further unfolding the grayscale and further beneficial to improving the display effect. Among them, by controlling the on-time ratio of the light emitting control module 440 in the display frame to control the black insertion time ratio of the sub-pixel in the display frame, the overall control of the black insertion time ratio of the sub-pixel in the display panel can be achieved, for example, the black insertion time ratio of all sub-pixels in the display panel can be increased or decreased at the same time.

[0111] An embodiment of the present invention further provides a driving device for a display panel, wherein the display panel includes a plurality of sub-pixels. Fig. 9 is a schematic diagram of a structure of a driving device for a display panel provided by an embodiment of the present invention, with reference to Fig. 9 The driving device includes: a generating module 610, used to generate second display data according to first display data corresponding to a display frame, wherein the second display data includes display data of at least two display subframes; a driving module 620, used to drive a display panel according to the second display data, so that the display panel sequentially displays at least two display subframes; wherein in at least one display subframe, at least two subpixels of different grayscales correspond to different data voltages, and at least one subpixel does not emit light in one display subframe and emits light in another display subframe.

[0112] The display panel driving device of this embodiment is used to execute the display panel driving method of any of the above embodiments of the present invention, and has the beneficial effects of the display panel driving method of any of the above embodiments of the present invention, which will not be described in detail here.

[0113] An embodiment of the present invention further provides a display device, which may include a driving device for the display panel of the above-mentioned embodiment, or may be driven by a driving method for a display panel of any of the above-mentioned embodiments of the present invention, and has the beneficial effects of the driving method for a display panel of any of the above-mentioned embodiments of the present invention, which will not be described in detail herein.

[0114] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for driving a display panel, characterized in that: The display panel includes a plurality of sub-pixels, and the driving method includes: Generate second display data according to the first display data corresponding to the display frame, wherein the second display data includes display data of at least two display subframes; drive the display panel according to the second display data so that the display panel sequentially displays the at least two display subframes; In at least one of the display sub-frames, at least two sub-pixels of different grayscales correspond to different data voltages, and at least one sub-pixel does not emit light in one of the display sub-frames, but emits light in another of the display sub-frames.

2. The method for driving a display panel according to claim 1, wherein: The first display data includes a target display grayscale corresponding to the sub-pixel in the display frame, and the second display data includes data voltages corresponding to at least two of the display sub-frames, or target display grayscales corresponding to the at least two display sub-frames; Preferably, in the second display data, the target display grayscale corresponding to the display subframe in which the subpixel does not emit light is grayscale 0; in the second display data, the data voltage corresponding to the display subframe in which the subpixel does not emit light is a black state data voltage; Preferably, in the second display data, the target display grayscale corresponding to the display subframe in which the subpixel emits light is equal to the target display grayscale of the subpixel in the display frame; or, in the second display data, the data voltage corresponding to the display subframe in which the subpixel emits light is the data voltage corresponding to the target display grayscale of the subpixel; Preferably, in the same display sub-frame, sub-pixels of different target display grayscales correspond to different data voltages.

3. The method for driving a display panel according to claim 2, wherein: The generating the second display data according to the first display data corresponding to the display frame comprises: According to the number of the display subframes included in the display frame, the display grayscale range of the display panel is divided into at least two gray stages; wherein the gray stages include at least one display grayscale; wherein different gray stages correspond to different black insertion time ratios; Determining a target gray stage to which the target display gray scale belongs according to the target display gray scale corresponding to the sub-pixel in the display frame; generating second display data according to the target display grayscale and the target gray stage to which the target display grayscale belongs; Preferably, the black insertion time ratio corresponds to the target display grayscale, and under at least a portion of the display grayscale, the black insertion time ratio is negatively correlated with the target display grayscale; Preferably, in at least two of the gray stages, the black insertion time ratio is negatively correlated with the gray stage; Preferably, dividing the display grayscale range of the display panel into at least two grayscale stages according to the number of the display subframes included in the display frame comprises: Determining the number of black insertion time ratios that can be combined by each of the display subframes according to the number of the display subframes included in the display frame; dividing the display grayscale range of the display panel into at least two gray stages according to the number of the black insertion time ratios; Preferably, the number of the gray stages is less than or equal to the number of black insertion time ratios that can be combined by the display sub-frames included in the display frame; Preferably, the displayed grayscale in the gray stage is continuous; Preferably, in different display frames, different grayscale values ​​of the same sub-pixel at the same gray stage correspond to different data voltages; Preferably, in different display frames, different target display grayscales of the same sub-pixel correspond to different data voltages.

4. The method for driving a display panel according to claim 3, wherein: The at least two gray stages include a first gray stage and a second gray stage; the maximum gray scale of the first gray stage is smaller than the minimum gray scale of the second gray stage; The black insertion time ratio corresponding to the first gray stage is greater than the black insertion time ratio corresponding to the second gray stage; Preferably, the number of grayscales included in the first gray stage is smaller than the number of grayscales included in the second gray stage; Preferably, at least two gray stages include a lowest gray stage, and the lowest gray stage includes grayscale 0; the black insertion time ratio corresponding to the lowest gray stage is equal to 100%; Preferably, the at least two gray stages include a highest gray stage, and the minimum gray scale in the highest gray stage is greater than the maximum gray scale in the other gray stages; Preferably, the black insertion time ratio corresponding to the highest gray stage is less than or equal to 20%; Preferably, the black insertion time ratio corresponding to the highest gray stage is equal to 0.

5. The method for driving a display panel according to claim 3, wherein: Before dividing the display grayscale range of the display panel into at least two grayscale stages according to the number of the display subframes included in the display frame, the method further includes: Setting the time ratio of each display subframe; Preferably, the time ratio of each display subframe is adjustable.

6. The method for driving a display panel according to claim 3, wherein: The first display data also includes a target brightness level corresponding to the display frame, and before dividing the display grayscale range of the display panel into at least two gray stages according to the number of the display subframes included in the display frame, further includes: Determining the number of types of black insertion time ratios required within a display grayscale range of the display panel according to the target display brightness level; Determining the target number of the display subframes according to the number of types of the black insertion time ratios; Dividing one of the display frames into the target number of the display sub-frames; Preferably, the number of types of black insertion time ratios required at a first brightness level is greater than the number of types of black insertion time ratios required at a second brightness level; and the first brightness level is lower than the second brightness level.

7. The method for driving a display panel according to claim 1, wherein: The sub-pixels of different gray levels correspond to different data voltages.

8. The method for driving a display panel according to any one of claims 1 to 7, characterized in that: The sub-pixel includes a pixel circuit and a light-emitting module, and the pixel circuit includes a data writing module and a driving module; The data writing module is used to write the target data voltage corresponding to the sub-pixel in the second display data to the control terminal of the driving module, and the driving module is used to generate a driving current according to the target data voltage to drive the light-emitting module; Preferably, the pixel circuit further includes a light emitting control module, and the light emitting control module is used to control the connection state between the driving module and the light emitting module; the driving method further includes: The black insertion time ratio of the sub-pixel in the display frame is controlled by controlling the on-time ratio of the light emitting control module in the display frame.

9. A driving device for a display panel, characterized in that: The display panel includes a plurality of sub-pixels, and the driving device includes: A generating module, configured to generate second display data according to first display data corresponding to a display frame, wherein the second display data includes display data of at least two display subframes; a driving module, configured to drive the display panel according to the second display data, so that the display panel sequentially displays the at least two display sub-frames; In at least one of the display sub-frames, at least two sub-pixels of different grayscales correspond to different data voltages, and at least one sub-pixel does not emit light in one of the display sub-frames, but emits light in another of the display sub-frames.

10. A display device, characterized in that: A display panel driving device comprising the display panel according to claim 9 or a display panel driving method according to any one of claims 1 to 8 for driving.

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