Driving method and apparatus of display panel, display apparatus

Abstract

Embodiments of the present application disclose a display panel driving method and device, and a display device. The method comprises: generating second display data according to first display data corresponding to a display frame, the second display data comprising display data of at least two display subframes; and driving the display panel according to the second display data, so that the display panel displays display pictures of the at least two display subframes in sequence. In at least one display subframe, data voltages corresponding to subpixels of at least two different gray scales are different, and at least one subpixel does not emit light in one display subframe and emits light in another display subframe. In the embodiments of the present application, the digital driving mode is combined with the analog driving mode, and the display effect is improved by combining the black insertion time proportion of the subpixel with the light emitting brightness of the subpixel in the light emitting display subframe.

Description

Technical Field

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

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

[0003] In the existing technology, the driving methods for display panels include digital driving and analog driving. However, both digital driving and analog driving methods have certain defects, which affect the display effect of the display panel. Summary of the Invention

[0004] This invention provides a driving method and apparatus for a display panel, as well as a display device, to drive the display panel through a hybrid digital and analog driving method, thereby improving the display effect of the display panel.

[0005] In a first aspect, embodiments of the present invention provide a driving method for a display panel, the display panel including a plurality of sub-pixels, the driving method including:

[0006] The second display data is generated based on the first display data corresponding to the display frame. The second display data includes the display data of at least two display subframes. The display panel is driven based on 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 gray levels correspond to different data voltages, and at least one subpixel does not emit light in one display subframe but emits light in another display subframe.

[0008] Optionally, the first display data includes the target display grayscale corresponding to the sub-pixel within the display frame, and the second display data includes the data voltage corresponding to at least two display sub-frames, or the target display grayscale 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-illuminating display sub-frame is 0 grayscale; in the second display data, the data voltage corresponding to the sub-pixel in the non-illuminating display sub-frame is the black state data voltage.

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

[0011] Optionally, within the same display subframe, the data voltages corresponding to the subpixels of different target display grayscale levels are different.

[0012] Optionally, second display data is generated based on the first display data corresponding to the display frame, including:

[0013] Based on 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, each gray stage includes at least one display gray level; and different gray stages correspond to different black insertion time ratios.

[0014] Based on the target display gray level corresponding to the sub-pixel in the display frame, determine the target gray level to which the target display gray level belongs;

[0015] The second display data is generated based on the target display grayscale and the target grayscale to which the target display grayscale belongs.

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

[0017] Optionally, in at least two gray phases, the black insertion time ratio is negatively correlated with the gray phase.

[0018] Optionally, based on 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, including:

[0019] The number of black insertion time ratios that can be combined by each display subframe is determined based on the number of display subframes included in the display frame; the display panel's grayscale range is divided into at least two gray stages based on 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 from the display subframes included in the display frame;

[0021] Optionally, the grayscale levels within the grayscale range are continuous;

[0022] Optionally, in different display frames, the data voltage corresponding to different gray levels of the same sub-pixel in the same gray stage is different;

[0023] Optionally, in different display frames, the data voltage corresponding to different target display gray levels of the same sub-pixel is different.

[0024] Optionally, at least two gray stages include a first gray stage and a second gray stage; the maximum gray level of the first gray stage is less than the minimum gray level 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 gray levels included in the first gray stage is less than the number of gray levels included in the second gray stage;

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

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

[0028] Optionally, the proportion of black insertion time 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 panel's grayscale range into at least two grayscale stages based on the number of display subframes included in the display frame, the method further includes:

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

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

[0033] Optionally, the first display data also includes the target brightness level corresponding to the display frame, and before dividing the display panel's grayscale range into at least two grayscale stages based on the number of display subframes included in the display frame, it also includes:

[0034] The number of types of black insertion time ratios required within the display grayscale range of the display panel are determined based on the target display brightness level.

[0035] The number of target subframes to be displayed is determined based on the number of types of black insertion time ratios;

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

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

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

[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. 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 also includes an emissive control module, which controls the connection state between the driving module and the emissive module; the driving method further includes:

[0042] The proportion of black insertion time of sub-pixels within the display frame is controlled by adjusting the on-time ratio of the light emission control module within the display frame.

[0043] Secondly, embodiments of the present invention also provide a driving device for a display panel, the display panel including a plurality of sub-pixels, the driving device including:

[0044] The generation module is used to generate second display data based on the first display data corresponding to the display frame. The second display data includes display data of at least two display sub-frames.

[0045] The driving module is used to drive the display panel according to the second display data, so that the display panel displays at least two display subframes in sequence;

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

[0047] Thirdly, embodiments of the present invention also provide a display device, including a driving device for the display panel of the second aspect or driving it using the driving method for the display panel of the first aspect.

[0048] This invention provides a driving method and apparatus for a display panel, and a display device. It generates second display data based on first display data corresponding to a display frame. The second display data includes display data for at least two display sub-frames. The display panel is driven according to the second display data, causing the display panel to sequentially display the display images of at least two display sub-frames. In at least one display sub-frame, at least two sub-pixels of different grayscale levels correspond to different data voltages, and at least one sub-pixel does not emit light in one display sub-frame but emits light in another. This invention combines digital driving and analog driving methods, and by controlling the black-insertion time ratio of sub-pixels and the luminance of sub-pixels in luminous display sub-frames, it is beneficial to improve the display effect. Due to the presence of black insertion, when displaying the same grayscale level, the display brightness of sub-pixels needs to be increased compared to a display without black insertion, thus enabling sub-pixels to display the same grayscale level at a higher display brightness. For low grayscale displays, this increases display brightness and improves the display effect. Attached Figure Description

[0049] Figure 1 This is a flowchart of a driving method for a display panel provided in an embodiment of the present invention;

[0050] Figure 2This is a schematic diagram of a display panel driven using an analog driving method in related technologies;

[0051] Figure 3 This is a schematic diagram illustrating the driving method of the display panel according to an embodiment of the present invention.

[0052] Figure 4 This is a flowchart of another display panel driving method provided in an embodiment of the present invention;

[0053] Figure 5 This is a schematic diagram showing the correspondence between the gray phase and the black insertion time ratio;

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

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

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

[0057] Figure 9 This is a schematic diagram of the structure of a display panel driving device provided in an embodiment of the present invention. Detailed Implementation

[0058] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0059] This invention provides a driving method for a display panel, wherein the display panel includes a plurality of sub-pixels. Figure 1 This is a flowchart of a display panel driving method provided in an embodiment of the present invention, see reference. Figure 1 The driving method for this display panel includes:

[0060] Step 110: Generate second display data based on the first display data corresponding to the display frame. The second display data includes display data of at least two display subframes.

[0061] Specifically, in this embodiment of the invention, a digital driving method is introduced, and a display frame of the display panel includes at least two display subframes, the duration of each display subframe being less than the total duration of the display frame. Figure 2 This is a schematic diagram of a display panel driven using an analog driving method in related technologies. Figure 2The horizontal axis 't' represents time, and the vertical axis 'Row' represents the sub-pixel row of the display panel. 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. (Reference) Figure 2 In analog drive mode, the display panel is scanned once within a display frame H0, where the display frame H0 may include the scanning phase HC and the blank area BL. Figure 3 This is a schematic diagram illustrating the driving method of the display panel 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. 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. (Reference) Figure 3 When driving the display panel using the display panel driving method of this embodiment of the invention, a display frame is divided into at least two display subframes, and the display panel is scanned in each display subframe. Therefore, the number of scans of the display panel in one frame is at least two. Figure 3 The illustration shows a case where a display frame H0 includes three display subframes (H1, H2, and H3).

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

[0063] Step 120: Drive the display panel according to the second display data, so that the display panel displays at least two display subframes in sequence.

[0064] Specifically, in this step, corresponding driving data can be provided to the sub-pixels in each display sub-frame based on the second display data, so as to control the display panel to display the display image corresponding to the display sub-frame. Optionally, the driving data can be data voltage.

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

[0066] Optionally, two different gray levels can correspond to the gray levels of a display frame, or they can correspond to the gray levels of a display sub-frame. In some embodiments, the data voltages corresponding to sub-pixels of different gray levels are different.

[0067] Thus, in this embodiment of the invention, the display frame is configured to include multiple display sub-frames using a digital driving method, and combined with an analog driving method, the brightness of the sub-pixels within the display sub-frames can be controlled by providing corresponding data voltages to the sub-pixels. Furthermore, at least one sub-pixel can be kept non-illuminating in one display sub-frame and illuminated in another, enabling black pixel insertion control. In this embodiment of the invention, combining digital and analog driving methods, and controlling the black pixel insertion time ratio in conjunction with the brightness of the display sub-frames in which the sub-pixels are illuminating, improves the display effect.

[0068] The display panel driving method of this embodiment generates second display data based on first display data corresponding to a display frame. The second display data includes display data for at least two display sub-frames. The display panel is driven according to the second display data, causing the display panel to sequentially display the display images of at least two display sub-frames. In at least one display sub-frame, at least two sub-pixels of different gray levels correspond to different data voltages, and at least one sub-pixel does not emit light in one display sub-frame but emits light in another. In this embodiment, digital driving and analog driving methods are combined. By controlling the black insertion time ratio of the sub-pixel and the luminance of the sub-pixel in the luminous display sub-frame, the display effect is improved. Due to the presence of black insertion, when displaying the same gray level, the display brightness of the sub-pixel needs to be increased compared to the display method without black insertion. This allows the sub-pixel to display the same gray level at a higher display brightness, improving the display brightness and display effect for low gray levels.

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

[0070] Within a display frame, each sub-pixel corresponds to a target display grayscale. Depending on the target image, the target display grayscales corresponding to different sub-pixels can be the same or different. Sub-pixels are displayed at their respective target display grayscales, enabling the display panel to display the corresponding target image within the display frame. Optionally, a pre-defined and stored correspondence between the target display grayscale and the target illumination state of the sub-pixels within each display sub-frame is established. Then, based on the target display grayscale and the aforementioned correspondence, the target illumination state of the sub-pixels within each display sub-frame is determined. The target illumination state can 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 based on the target display grayscale corresponding to the sub-pixel; the target illumination state of the sub-pixels within each display sub-frame is determined based on the target black insertion time ratio. Optionally, based on the target display grayscale corresponding to the sub-pixel and the target illumination 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 illumination 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 sub-pixel in the non-emitting (dark state) display sub-frame is 0 grayscale; in the second display data, the data voltage corresponding to the sub-pixel in the non-emitting display sub-frame is the black state data voltage.

[0072] In some embodiments, the target display grayscale corresponding to the sub-pixel in the illuminated (bright) display sub-frame 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 illuminated display sub-frame is the data voltage corresponding to the target display grayscale of the sub-pixel.

[0073] Optionally, within the same display subframe, the data voltages corresponding to subpixels of different target display grayscale levels are different. This ensures that the brightness of subpixels corresponding to different target display grayscale levels is different within the same display subframe. Furthermore, by controlling the black insertion time ratio of subpixels within the display frame and the brightness of their illumination within the illuminated display subframe, the display of the target display grayscale corresponding to the display frame can be achieved.

[0074] Specifically, the target data voltage provided to the sub-pixel within the display sub-frame corresponds to the target illumination state within that sub-frame. Furthermore, when the sub-pixel's target illumination state within 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 within the display sub-frame, the illumination state of the sub-pixel within the display sub-frame can be controlled, thereby controlling the illumination duration of the sub-pixel within a display frame and achieving control over the black insertion time ratio of the sub-pixel within a display frame. Here, black insertion time refers to the time the sub-pixel does not emit light. The black insertion time ratio can be equal to the ratio of the time the sub-pixel does not emit light within the display frame to the total display frame time. Additionally, in this embodiment of the invention, by combining analog driving, the illumination brightness of the sub-pixel within the display sub-frame can also be controlled by providing the corresponding target data voltage to the sub-pixel within the display sub-frame. In this embodiment, by combining digital driving with analog driving, the brightness of the sub-pixel in the bright state of the display sub-frame can be different under different target display grayscales, which is more conducive to grayscale expansion.

[0075] Figure 4 This is a flowchart of another display panel driving method provided in an embodiment of the present invention, see reference. Figure 4 The driving method for this display panel includes:

[0076] Step 210: Based on 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.

[0077] The grayscale level includes at least one display grayscale level; different grayscale levels correspond to different black insertion time ratios.

[0078] Optionally, the black-insertion time ratio corresponds to the target display grayscale. Under at least a partial display grayscale, the black-insertion time ratio is negatively correlated with the target display grayscale; that is, under at least a partial display grayscale, the larger the target display grayscale, the smaller the black-insertion time ratio. Because this embodiment uses a driving method combining digital and analog driving to set the target data voltage within the display subframe to correspond to the target display grayscale, different target data voltages can be used when the target emission state of a sub-pixel is in a bright state under different target display grayscales. Consequently, the emission brightness of the sub-pixel can be different. This allows for the display of different grayscale levels even when the target display grayscale is larger and the black-insertion time ratio is smaller under at least a partial display grayscale. Furthermore, by setting the black insertion time ratio to be smaller for a larger target grayscale at least in part of the display grayscale, it is possible to achieve different black insertion time ratios for low and high grayscale within a single display frame. On the one hand, this ensures normal black insertion at low grayscale, guaranteeing the display effect at low grayscale; on the other hand, it ensures that the black insertion time ratio is smaller or non-existent at high grayscale, preventing the brightness of sub-pixels from becoming too high. This prevents the voltage output range of the driver chip from becoming too large, reducing the requirements on the driver chip and ensuring the display effect of the display panel at high grayscale.

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

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

[0081] Specifically, compared to high grayscale, the human eye is extremely sensitive to changes in brightness at low grayscale. Therefore, changes in the black insertion time ratio have a significant impact on the perceived brightness at low grayscale. In this embodiment, the number of grayscale levels included in the first grayscale stage is set to be less than the number of grayscale levels included in the second grayscale stage. This results in a relatively smaller number of grayscale levels in the grayscale stages corresponding to the low grayscale range and a relatively larger number of grayscale levels in the grayscale stages corresponding to the high grayscale range. Consequently, a black insertion time ratio corresponds to fewer grayscale levels in the low grayscale range and more grayscale levels in the high grayscale range. This allows the low grayscale to be expanded more accurately, ensuring good display effects at low grayscale.

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

[0083] Optionally, at least two gray stages include a highest gray stage, where the minimum gray level in the highest gray stage is greater than the maximum gray level in the other gray stages; the black insertion time ratio corresponding to the highest gray stage is less than or equal to 20%. This ensures that the brightness of sub-pixels at high gray levels is not excessively high, further reducing the requirements on the driver chip and guaranteeing display quality. 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 from 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 gray 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 from 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 from each display subframe is equal to 8. Table 1 shows the 8 possible 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 respectively).

[0085] Table 1

[0086]

[0087]

[0088] Referring to Table 1, Level 1-Level 8 represent 8 different black insertion time ratios, with the black insertion time ratio gradually decreasing from Level 1 to Level 8. 0 indicates that the sub-pixel does not emit light within the display sub-frame (i.e., the target emission state of the sub-pixel within the display sub-frame is black), and 1 indicates that the sub-pixel emits light within the display sub-frame (i.e., the target emission state of the sub-pixel within the display sub-frame is bright).

[0089] Once the number of black insertion time ratios that can be combined from each display subframe is determined, the grayscale range of the display panel can be divided into at least two gray stages based on the number of black insertion time ratios. Then, the illumination state of each display subframe corresponding to each gray stage can be set, i.e., the correspondence between the gray stages and the illumination states of each display subframe. In some optional embodiments of this invention, the number of gray stages is less than or equal to the number of black insertion time ratios that can be combined from the display subframes included in the display frame. This allows for different black insertion time ratios in different gray stages, which is more conducive to grayscale expansion.Figure 5 This is a schematic diagram showing the correspondence between the gray phase and the black insertion time ratio, where... Figure 5 The example shown uses the number of gray stages equal to the number of black insertion time ratios. The gray scale ranges corresponding to the eight gray stages are G0 (0 gray scale), G1-G8 (1-8 gray scale), G9-G24 (9-24 gray scale), G25-G48 (25-48 gray scale), G49-G80 (49-80 gray scale), G81-G128 (81-128 gray scale), G129-G172 (129-172 gray scale), and G173-G255 (173-255 gray scale).

[0090] Step 220: Determine the target gray level to which the target display gray level belongs based on the target display gray level corresponding to the sub-pixel in the display frame.

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

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

[0093] Optionally, step 230 includes determining the display subframes where the subpixel emits light and those where it does not, based on the grayscale level of the target display grayscale corresponding to the subpixel in the display frame; and determining the target data voltage corresponding to the subpixel in the emitting display subframe, based on the target display grayscale corresponding to the subpixel in the display frame. The target data voltage corresponding to the subpixel in the non-emitting display subframe is the black state data voltage. The target data voltage corresponding to the subpixel in the emitting display subframe is equal to the data voltage corresponding to the target display grayscale.

[0094] By dividing the display panel's grayscale range into at least two grayscale stages and determining the target grayscale stage to which the target display grayscale of a sub-pixel belongs, and then determining the illumination state of each display sub-frame corresponding to the target grayscale of the sub-pixel as the target illumination state of each display sub-frame, the illuminated and non-illuminated display sub-frames of the sub-pixel are determined. This ensures that the same grayscale stage corresponds to the same illumination state of each display sub-frame, i.e., the same black insertion time ratio, while different grayscale stages correspond to different illumination states of each display sub-frame, i.e., different black insertion time ratios. Furthermore, the technical solution of this embodiment does not require setting different black insertion time ratios for each target display grayscale, which can reduce the number of display sub-frames divided into the display frame, thereby reducing the number of scans of the display panel and lowering the driving power consumption of the display panel.

[0095] When the target illumination state corresponding to a sub-pixel within a display sub-frame is bright, a target data voltage corresponding to the target display grayscale is provided to the sub-pixel within the display sub-frame. Similar to the analog driving method, different sub-pixels will have different target display grayscales within the same illumination display sub-frame. Table 2 shows the grayscale range when the display frame includes three display sub-frames. Figure 5 The diagram shows the data voltage provided to the sub-pixels in each of the three display sub-frames under eight different black insertion time ratios during the eight gray stages.

[0096] Table 2

[0097] Display subframe 1 Display subframe 2 Display subframe 3 Level 1 Data 0 Data 0 Data 0 Level 2 Data 0 Data 0 Data (G1-G8) Level 3 Data 0 Data (G9-G24) Data 0 Level 4 Data 0 Data (G25-G48) Data (G25-G48) Level 5 Data (G49-G80) Data 0 Data 0 Level 6 Data (G81-G128) Data 0 Data (G81-G128) Level 7 Data (G129-G172) Data (G129-G172) Data 0 Level 8 Data (G173-G255) Data (G173-G255) Data (G173-G255)

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

[0100] Based on the above embodiments, optionally, in the above embodiments, before steps 110 and 210, the method 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 subpixels can be adjusted to ensure that the display panel meets the brightness or color requirements. In some optional embodiments of the present invention, the time ratio of each display subframe can be the same as that of existing digital driving methods, 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 may also include the target brightness level corresponding to the display frame. Before steps 110 and 210, the method further includes: determining the number of types of black insertion time ratios required within the display grayscale range of the display panel based on the target display brightness level; determining the target number of display subframes based on the number of types of black insertion time ratios; and dividing a display frame into the target number of display subframes.

[0102] Specifically, mobile phones, computers, and other display devices typically include brightness adjustment buttons. Users use these buttons to adjust the overall display brightness, with each press corresponding to an input brightness level. Each brightness level corresponds to the brightness of the maximum grayscale level on the display panel. Changing the brightness of the maximum grayscale level will also change the brightness of the other grayscale levels. Specifically, increasing the brightness of the maximum grayscale level increases the brightness of the other grayscale levels; conversely, decreasing the brightness of the maximum grayscale level decreases the brightness of the other grayscale levels.

[0103] The larger the 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 should satisfy the condition 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 grayscale range of the display panel. For example, when the grayscale range of the display panel is 0-255 grayscale, the required number of black insertion time ratio types is 8, so the target number of display subframes can be determined as 3; when the grayscale range of the display panel is 0-1023 grayscale, the required number of black insertion time ratio types is 30, so the target number of display subframes can be determined as 5.

[0104] Optionally, the number of different black insertion time ratios required at the first brightness level is greater than the number of different black insertion time ratios required at the second brightness level; the first brightness level is lower than the second brightness level. This results in a higher number of different black insertion time ratios required at lower brightness levels, which is beneficial for low-grayscale expansion and improves display quality.

[0105] Figure 6 This is a schematic diagram of a sub-pixel structure provided in an embodiment of the present invention, for reference. Figure 7Optionally, the sub-pixel includes a pixel circuit and a light-emitting module 500. 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. 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. 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 structure of the sub-pixels shown indicates that the pixel circuit includes fewer modules, and consequently, fewer circuit components. This allows for application in high-pixel-density display panels, such as display devices for virtual reality (VR), augmented reality (AR), and holographic projection technologies. For those including... Figure 6 The display panel with the sub-pixel structure shown is driven by the display panel driving method of the present invention, which can ensure good display effect at low grayscale, while the brightness at high grayscale will not be too high, reducing the requirements on the driving chip and ensuring the display effect at high grayscale.

[0107] In the above embodiments of the present invention, the light emission state of sub-pixels within a display sub-frame is controlled solely by data voltage, thereby controlling the black insertion time ratio of the sub-pixel within a display frame. In other optional embodiments of the present invention, for sub-pixels whose pixel circuits include a light emission control module, the black insertion time ratio of the sub-pixel within a display frame can be further controlled by combining the control of the conduction time of the light emission control module.

[0108] Figure 7 This is a schematic diagram of another sub-pixel structure provided in an embodiment of the present invention. Figure 8 This is a schematic diagram of another sub-pixel structure provided in an embodiment of the present invention, for reference. Figure 7 and Figure 8 Optionally, the pixel circuit also includes an emissive control module 440. The control terminal of the emissive control module 440 is connected to the emissive control signal EM. The emissive control module 440 is used to control the connection state between the driving module 420 and the emissive module 500. (Reference) Figure 8The light-emitting control module 440 may include a first light-emitting control unit 441 and a second light-emitting control unit 442. The first light-emitting control unit 441 is connected between the first power line VDD and the first terminal of the driving module 420, and the second light-emitting control unit 442 is connected between the second terminal 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 terminal and the second terminal 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 terminal of the driving module 420 and is used to initialize the control terminal 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 also includes controlling the black insertion time ratio of the sub-pixel within the display frame by controlling the on-time ratio of the light emission control module 440 within the display frame.

[0110] Specifically, by controlling the on-time ratio of the light-emitting control module 440 within a display frame, the black-insertion time ratio of the corresponding sub-pixels within a display frame can be further controlled. For example, 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 a portion of the time within that sub-frame, the black-insertion time ratio can be reduced compared to a pixel circuit without the light-emitting control module 440. In this embodiment, based on a hybrid digital and analog drive, the control of the light-emitting control module 440 is further combined to control the black-insertion time ratio of the sub-pixels within the display frame, which is beneficial for further grayscale expansion and thus for improving the display effect. Furthermore, by controlling the on-time ratio of the light-emitting control module 440 within the display frame to control the black-insertion time ratio of the sub-pixels within the display frame, overall control of the black-insertion time ratio of the sub-pixels in the display panel can be achieved, for example, simultaneously increasing or decreasing the black-insertion time ratio of all sub-pixels in the display panel.

[0111] This invention also provides a driving device for a display panel, the display panel including a plurality of sub-pixels. Figure 9 This is a schematic diagram of the structure of a display panel driving device provided in an embodiment of the present invention, with reference to... Figure 9 The driving device includes: a generation module 610, used to generate second display data according to first display data corresponding to a display frame, the second display data including display data of at least two display sub-frames; and 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 sub-frames; wherein, in at least one display sub-frame, at least two sub-pixels of different gray levels correspond to different data voltages, and at least one sub-pixel does not emit light in one display sub-frame but emits light in another display sub-frame.

[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 again here.

[0113] This invention also provides a display device, which may include the driving device of the display panel in the above embodiments, or may be driven by the driving method of the display panel in any of the above embodiments of this invention, and has the beneficial effects of the driving method of the display panel in any of the above embodiments of this invention, which will not be described again here.

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

Claims

1. A driving method for a display panel, characterized in that, The display panel includes multiple sub-pixels, and the driving method includes: Second display data is generated based on first display data corresponding to a display frame, the second display data including display data of at least two display sub-frames; the display panel is driven based on 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 gray levels correspond to different data voltages, and at least one sub-pixel does not emit light in one display sub-frame but emits light in another display sub-frame; The first display data includes the target display grayscale corresponding to the sub-pixel within the display frame, and the second display data includes data voltages corresponding to at least two of the display sub-frames, or the target display grayscale corresponding to the at least two of the display sub-frames; The step of generating second display data based on first display data corresponding to a display frame includes: Based on 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, each gray stage includes at least one display gray level; and wherein, different gray stages correspond to different black insertion time ratios. Based on the target display gray level corresponding to the sub-pixel in the display frame, determine the target gray level to which the target display gray level belongs; Second display data is generated based on the target display grayscale and the target grayscale to which the target display grayscale belongs; The step of dividing the display panel's grayscale range into at least two grayscale stages based on the number of display subframes included in the display frame includes: The number of black insertion time ratios that can be combined from each of the display subframes is determined based on 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 based on the number of black insertion time ratios.

2. The driving method for the display panel according to claim 1, characterized in that, In the second display data, the target display grayscale corresponding to the sub-pixel in the non-illuminating display sub-frame is 0 grayscale; in the second display data, the data voltage corresponding to the sub-pixel in the non-illuminating display sub-frame is black state data voltage.

3. The driving method for the display panel according to claim 1, characterized in that, In the second display data, the target display grayscale of the sub-pixel in the illuminated display sub-frame is equal to the target display grayscale of the sub-pixel in the display frame; or, in the second display data, the data voltage of the sub-pixel in the illuminated display sub-frame is the data voltage corresponding to the target display grayscale of the sub-pixel.

4. The driving method for a display panel according to claim 1, characterized in that, Within the same display subframe, the data voltages corresponding to the sub-pixels of different target display grayscale levels are different.

5. The driving method for a display panel according to claim 1, characterized in that, The black insertion time ratio corresponds to the target display grayscale. Under at least a partial display grayscale, the black insertion time ratio is negatively correlated with the target display grayscale.

6. The driving method for a display panel according to claim 1, characterized in that, In at least two of the gray stages, the black insertion time ratio is negatively correlated with the gray stage.

7. The driving method for a display panel according to claim 1, characterized in that, The number of gray stages is less than or equal to the number of black insertion time ratios that can be combined from the display subframes included in the display frame.

8. The driving method for a display panel according to claim 1, characterized in that, The display grayscale is continuous within the grayscale stage.

9. The driving method for a display panel according to claim 1, characterized in that, In different display frames, the data voltage corresponding to different gray levels of the same sub-pixel in the same gray stage is different.

10. The driving method for a display panel according to claim 1, characterized in that, In different display frames, the data voltage corresponding to different target display gray levels of the same sub-pixel is different.

11. The driving method for a display panel according to claim 1, characterized in that, The at least two gray stages include a first gray stage and a second gray stage; the maximum gray level of the first gray stage is less than the minimum gray level 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.

12. The driving method for a display panel according to claim 11, characterized in that, The number of gray levels included in the first gray stage is less than the number of gray levels included in the second gray stage.

13. The driving method for a display panel according to claim 11, characterized in that, At least two gray stages include a minimum gray stage, which includes a gray level of 0; the black insertion time ratio corresponding to the minimum gray stage is equal to 100%.

14. The driving method for a display panel according to claim 11, characterized in that, At least two gray stages include a highest gray stage, where the minimum gray level in the highest gray stage is greater than the maximum gray level in the other gray stages.

15. The driving method for a display panel according to claim 14, characterized in that, The proportion of black insertion time corresponding to the highest gray stage is less than or equal to 20%.

16. The driving method for a display panel according to claim 14, characterized in that, The black insertion time ratio corresponding to the highest gray stage is equal to 0.

17. The driving method for a display panel according to claim 1, characterized in that, Before dividing the display grayscale range of the display panel into at least two grayscale stages based on the number of display subframes included in the display frame, the method further includes: Set the time ratio for each of the aforementioned display subframes.

18. The driving method for a display panel according to claim 17, characterized in that, The time ratio of each of the aforementioned display subframes is adjustable.

19. The driving method for a display panel according to claim 1, characterized in that, The first display data also includes the target brightness level corresponding to the display frame, and 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, it further includes: The number of types of black insertion time ratios required within the grayscale range of the display panel are determined based on the target display brightness level. The target number of display subframes is determined based on the number of types of black insertion time ratios; Divide a display frame into the target number of display subframes.

20. The driving method for a display panel according to claim 19, characterized in that, 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.

21. The driving method for a display panel according to claim 1, characterized in that, The data voltages corresponding to the sub-pixels of different gray levels are different.

22. The driving method for a display panel according to any one of claims 1-21, 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.

23. The driving method for a display panel according to claim 22, characterized in that, The pixel circuit further includes a light-emitting control module, which controls 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 emission control module in the display frame.

24. A driving device for a display panel, used to perform the driving method for a display panel as described in any one of claims 1-23, characterized in that, The display panel includes multiple sub-pixels, and the driving device includes: The generation module is used to generate second display data based on the first display data corresponding to the display frame, wherein the second display data includes display data of at least two display sub-frames; The driving module is used to 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 gray levels correspond to different data voltages, and at least one sub-pixel does not emit light in one display sub-frame but emits light in another display sub-frame.

25. A display device, characterized in that, The display panel can be driven by the driving device of claim 24 or by the driving method of any one of claims 1-23.

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