Display panel and display device

Abstract

Provided is a dimming method of a display panel, comprising: obtaining image data of an image to be displayed; determining initial dimming pixel data of each dimming pixel according to the image data; determining dimming pixels to be filtered in a dimming screen according to the initial dimming pixel data of each dimming pixel; determining a first filtering area according to the determined dimming pixels to be filtered, wherein the first filtering area is centered on the determined dimming pixels to be filtered, the first filtering area includes a first preset number of dimming pixels in a first direction and a second direction, and the first direction and the second direction intersect; determining filtering parameters of each dimming pixel in the first filtering area according to a relationship between each dimming pixel in the first filtering area and the initial dimming pixel data of each dimming pixel in the first filtering area; and updating the dimming pixel data of the dimming pixels to be filtered according to the filtering parameters of each dimming pixel in the first filtering area to obtain updated dimming pixel data.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to the technical field of display, and in particular, to a display panel and a display device. BACKGROUND

[0002] The local dimming technology can change the backlight brightness in real time according to the display image, so as to save the backlight power consumption and improve the contrast of the picture quality. The liquid crystal display panel can include two overlapping liquid crystal screens, one of which is used for displaying images, and the other of which is used for local dimming. The liquid crystal display panel can significantly improve its contrast, and the display effect can be comparable to that of an organic light-emitting diode (OLED) display panel. The liquid crystal display panel including two liquid crystal screens can be referred to as a double-cell liquid crystal display panel, which can achieve a contrast of more than 100,000 and high-precision dynamic dimming of a million partitions through double-screen control, and is favored by customers.

[0003] The above information disclosed in this section is only for the understanding of the background of the technical concept of the present disclosure, and therefore, the above information can contain information which does not constitute the prior art. SUMMARY

[0004] In one aspect, a dimming method of a display panel is provided, wherein the display panel includes a dimming screen and a display screen, the dimming screen is disposed on the backlight side of the display screen and is configured to modulate the backlight of the display screen, the dimming screen includes a plurality of dimming pixels, the display screen includes a plurality of display pixels, and the dimming method includes:

[0005] obtaining image data of an image to be displayed;

[0006] determining initial dimming pixel data of each dimming pixel according to the image data;

[0007] determining a dimming pixel to be filtered in the dimming screen according to the initial dimming pixel data of each dimming pixel;

[0008] determining a first filtering area according to the determined dimming pixel to be filtered, wherein the first filtering area is centered on the determined dimming pixel to be filtered, the first filtering area includes a first preset number of dimming pixels in a first direction and a second direction, and the first direction and the second direction intersect;

[0009] determining a filtering parameter of each dimming pixel in the first filtering area according to the relationship between each dimming pixel in the first filtering area and the initial dimming pixel data of each dimming pixel in the first filtering area; and

[0010] According to the filter parameters of the respective dimming pixels in the first filter region, the dimming pixel data of the dimming pixel to be filtered is updated to obtain updated dimming pixel data.

[0011] According to some exemplary embodiments, the filter parameters of the respective dimming pixels in the first filter region are determined according to the relationship between the respective dimming pixels in the first filter region and the initial dimming pixel data of the respective dimming pixels in the first filter region, specifically comprising:

[0012] According to the initial dimming pixel data of the respective dimming pixels in the first filter region, a first filter coefficient K1 of the respective dimming pixels in the first filter region is determined,

[0013] The first filter coefficient of the respective dimming pixels in the first filter region is positively correlated with the initial dimming pixel data of the respective dimming pixels in the first filter region.

[0014] According to some exemplary embodiments, the filter parameters of the respective dimming pixels in the first filter region are determined according to the relationship between the respective dimming pixels in the first filter region and the initial dimming pixel data of the respective dimming pixels in the first filter region, specifically comprising:

[0015] According to the first contrast curve, a second filter coefficient K2 of the respective dimming pixels in the first filter region is determined,

[0016] The first contrast is a ratio between the initial dimming pixel data of the dimming pixel to be filtered in the first filter region and the initial dimming pixel data of the respective dimming pixels in the first filter region, and the first contrast curve represents the relationship between the second filter coefficient and the first contrast.

[0017] According to some exemplary embodiments, the filter parameters of the respective dimming pixels in the first filter region are determined according to the relationship between the respective dimming pixels in the first filter region and the initial dimming pixel data of the respective dimming pixels in the first filter region, specifically comprising:

[0018] According to the second contrast curve, a third filter coefficient K3 of the respective dimming pixels in the second filter region is determined,

[0019] The second filter region is centered on the determined dimming pixel to be filtered, and the second filter region includes a second preset number of dimming pixels in the first direction and the second direction, and the second preset number is less than the first preset number.

[0020] The second contrast is a ratio between a maximum value of the initial dimming pixel data of each dimming pixel in the second filter region and the initial dimming pixel data of each dimming pixel in the second filter region, and the second contrast curve represents a relationship between the third filter coefficient and the second contrast.

[0021] According to some exemplary embodiments, the determining the filter parameter of each dimming pixel in the first filter region according to the relationship between each dimming pixel in the first filter region and the initial dimming pixel data of each dimming pixel in the first filter region specifically comprises:

[0022] determining a fourth filter coefficient K4 of each dimming pixel in the first filter region according to a distance between each dimming pixel in the first filter region and the dimming pixel to be filtered,

[0023] wherein the fourth filter coefficient of each dimming pixel in the first filter region is negatively related to the distance between each dimming pixel in the first filter region and the dimming pixel to be filtered.

[0024] According to some exemplary embodiments, the determining the first filter coefficient of each dimming pixel in the first filter region according to the initial dimming pixel data of each dimming pixel in the first filter region specifically comprises:

[0025] determining the first filter coefficient of each dimming pixel in the first filter region according to the initial dimming pixel data of each dimming pixel in the first filter region by using a first filter coefficient formula,

[0026] wherein the first filter coefficient formula is:

[0027]

[0028] wherein V is the initial dimming pixel data of each dimming pixel.

[0029] According to some exemplary embodiments, in the first contrast curve, when the first contrast is in the interval of [0, 1], the second filter coefficient K2 is negatively related to the first contrast; when the first contrast is greater than or equal to 1, the second filter coefficient K2 is equal to 1.

[0030] According to some exemplary embodiments, in the second contrast curve, the third filter coefficient K3 is negatively related to the second contrast.

[0031] According to some exemplary embodiments, the determining the filter parameter of each dimming pixel in the first filter area according to the relationship between each dimming pixel in the first filter area and the initial dimming pixel data of each dimming pixel in the first filter area specifically comprises:

[0032] According to the first filter coefficient K1, the second filter coefficient K2, the third filter coefficient K3 and the fourth filter coefficient K4, a filter coefficient K of each dimming pixel in the first filter area is determined.

[0033] The filter coefficient K of each dimming pixel in the first filter area is normalized to obtain a normalized filter coefficient KA of each dimming pixel in the first filter area.

[0034] The sum KAS of the normalized filter coefficient KA of each dimming pixel in the first filter area is calculated; and

[0035] The normalized filter coefficient KA of each dimming pixel in the first filter area is divided by the sum KAS to obtain the filter parameter of each dimming pixel in the first filter area.

[0036] According to some exemplary embodiments, the first preset number is 5 and the second preset number is 3.

[0037] According to some exemplary embodiments, the display panel further comprises a backlight source arranged on a side of the dimming screen away from the display screen and configured to provide backlight, the display screen comprises a plurality of display partitions, the backlight source comprises a plurality of backlight partitions, the plurality of display partitions and the plurality of backlight partitions correspond one by one, and the display partition comprises a plurality of display pixels; the dimming method further comprises:

[0038] According to the to-be-dimmed display pixel, a display partition needing dimming and a backlight partition corresponding to the display partition needing dimming are determined.

[0039] A plurality of dimming pixels corresponding to the display partition needing dimming are determined; and

[0040] According to the updated dimming pixel data of the plurality of dimming pixels corresponding to the display partition needing dimming, a backlight value of the backlight partition corresponding to the display partition needing dimming is determined.

[0041] According to some exemplary embodiments, the plurality of dimming pixels corresponding to the display sub-area requiring dimming comprises a first dimming pixel, a second dimming pixel and a third dimming pixel, a projection of the first dimming pixel on the display screen at least partially overlaps at least one of the plurality of display pixels in the display sub-area requiring dimming, the second dimming pixel and the third dimming pixel are respectively adjacent to the first dimming pixel in the second direction, and the second dimming pixel and the third dimming pixel are located on opposite sides of the first dimming pixel in the second direction

[0042] According to some exemplary embodiments, the determining of the backlight value of the backlight sub-area corresponding to the display sub-area requiring dimming according to the updated dimming pixel data of the plurality of dimming pixels corresponding to the display sub-area requiring dimming specifically comprises:

[0043] The backlight value of the backlight sub-area corresponding to the display sub-area requiring dimming is determined according to the updated dimming pixel data of the plurality of dimming pixels corresponding to the display sub-area requiring dimming by weighted summation.

[0044] According to some exemplary embodiments, the dimming method further comprises:

[0045] determining initial display pixel data of the display pixel requiring dimming according to the image data; and

[0046] determining a compensation coefficient of the display pixel requiring dimming according to the initial display pixel data of the display pixel requiring dimming and the backlight value of the backlight sub-area corresponding to the display pixel requiring dimming.

[0047] According to some exemplary embodiments, the compensation coefficient of the display pixel requiring dimming is determined according to the initial display pixel data of the display pixel requiring dimming and the backlight value of the backlight sub-area corresponding to the display pixel requiring dimming by using a compensation coefficient formula,

[0048] The compensation coefficient formula is:

[0049]

[0050] wherein Q is the compensation coefficient, W is the initial display pixel data, SBL is the backlight value, f represents rounding, γ0, γ1, γ2 are preset values.

[0051] According to some exemplary embodiments, the dimming method further comprises adjusting the display pixel data of the display pixel requiring dimming according to the determined compensation coefficient of the display pixel requiring dimming.

[0052] According to some exemplary embodiments, a projection of one dimming pixel on the display screen at least partially overlaps a plurality of display pixels arranged in m rows and m columns, m is a positive integer greater than 1.

[0053] The determining the initial light modulation pixel data of each light modulation pixel according to the image data specifically comprises:

[0054] determining initial display pixel data of each display pixel according to the image data; and

[0055] determining the initial light modulation pixel data of the light modulation pixel overlapping with the display pixels arranged in m rows and m columns according to the initial display pixel data of the display pixels arranged in m rows and m columns.

[0056] According to some exemplary embodiments, the determining the initial light modulation pixel data of the light modulation pixel overlapping with the display pixels arranged in m rows and m columns according to the initial display pixel data of the display pixels arranged in m rows and m columns specifically comprises:

[0057] sampling the display pixels arranged in m rows and m columns row by row to obtain sampling data of each row, wherein the sampling data of each row is a weighted sum result of a maximum value and an average value in the initial display pixel data of the display pixels in the row; and

[0058] taking the maximum value in the m rows of sampling data as the initial light modulation pixel data of the light modulation pixel.

[0059] In another aspect, a light modulation device of a display panel is provided, wherein the display panel comprises a light modulation screen and a display screen, the light modulation screen is arranged at a backlight side of the display screen and is configured to modulate backlight of the display screen, the light modulation screen comprises a plurality of light modulation pixels, the display screen comprises a plurality of display pixels, and the light modulation device comprises:

[0060] an image data acquisition module configured to acquire image data of an image to be displayed;

[0061] an initial light modulation pixel data determination module configured to determine initial light modulation pixel data of each light modulation pixel according to the image data;

[0062] a to-be-filtered light modulation pixel determination module configured to determine to-be-filtered light modulation pixels in the light modulation screen according to the initial light modulation pixel data of each light modulation pixel;

[0063] a first filter region determination module configured to determine a first filter region according to the determined to-be-filtered light modulation pixels, wherein the first filter region is centered on the determined to-be-filtered light modulation pixels, the first filter region comprises a first preset number of light modulation pixels in a first direction and a second direction, and the first direction and the second direction intersect.

[0064] The filter parameter determination module is configured to determine filter parameters of each dimming pixel in the first filter region according to relationships between the dimming pixels in the first filter region and initial dimming pixel data of each dimming pixel in the first filter region.

[0065] The dimming pixel data updating module is configured to update dimming pixel data of the dimming pixel to be filtered according to the filter parameters of each dimming pixel in the first filter region to obtain updated dimming pixel data.

[0066] In yet another aspect, a display device is provided, comprising:

[0067] one or more processors;

[0068] a memory device storing one or more programs,

[0069] wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to perform the method as described above.

[0070] In yet another aspect, a computer-readable storage medium is provided, having stored thereon executable instructions that, when executed by a processor, cause the processor to perform the method as described above. BRIEF DESCRIPTION OF DRAWINGS

[0071] The features and advantages of the present disclosure will become more apparent from the detailed description of example embodiments of the present disclosure with reference to the attached drawings.

[0072] Figure 1 is a structural schematic diagram of a display panel provided by at least one embodiment of the present disclosure.

[0073] Figures 2A-2C respectively Figure 1 are schematic diagrams of pixel distribution (pixel array) of a display screen and a dimming screen in the display panel shown in Figures 2A-2C schematically show different alignment states.

[0074] Figure 3 is a general flowchart of a dimming method of a display panel according to an embodiment of the present disclosure.

[0075] Figure 4 is a flowchart of a dimming method of a display panel according to some example embodiments of the present disclosure, which mainly corresponds to the steps performed in the dimming pixel data processing module shown in Figure 3

[0076] Figure 5 is a schematic diagram of a filter region used in a dimming method of a display panel according to an embodiment of the present disclosure.

[0077] Figure 6 ​A curve showing the relationship between the first filter coefficient and the dimming pixel data is schematically shown.

[0078] Figure 7 A first contrast curve used in a dimming method of a display panel according to an embodiment of the present disclosure is schematically shown.

[0079] Figure 8 A second contrast curve used in a dimming method of a display panel according to an embodiment of the present disclosure is schematically shown.

[0080] Figure 9A For Figure 2C A display effect diagram corresponding to the state shown.

[0081] Figure 9B A display effect diagram according to the updated dimming pixel data is schematically shown.

[0082] Figure 10 A schematic diagram for performing backlight correction is schematically shown.

[0083] Figure 11 A structural block diagram of a dimming device of a display panel according to an embodiment of the present disclosure is schematically shown.

[0084] Figure 12 A schematic diagram of a display device according to some exemplary embodiments of the present disclosure. DETAILED DESCRIPTION

[0085] For the purpose of making the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present disclosure.

[0086] It should be noted that in the drawings, the size and relative size of the elements can be exaggerated for clarity and / or descriptive purposes. Thus, the size and relative size of the elements in the drawings is not necessarily drawn to scale. In the description and drawings, the same or similar reference signs indicate the same or similar parts.

[0087] When an element is described as being "on" another element, "connected to" another element, or "coupled to" another element, it can be directly on, directly connected to, or directly coupled to the other element, or intervening elements can be present. In contrast, when an element is described as being "directly on," "directly connected to," or "directly coupled to" another element, there are no intervening elements present. Other terms of description used herein, and / or descriptive terms of relation between elements, are to be interpreted in a similar manner as well, such as "between" versus "directly between," "adjacent" versus "directly adjacent," or "on" versus "directly on," etc. In addition, the term "connected" can refer to physical or electrical connection, communication connection, and / or fluid connection. Furthermore, the X-axis, Y-axis, and Z-axis are not limited to three axes of a rectangular coordinate system, and can be interpreted in a broader sense. For example, the X-axis, Y-axis, and Z-axis can be perpendicular to each other, or can represent different directions that are not perpendicular to each other. For the purpose of the present disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" can be interpreted to mean any one of X, Y, Z, or any combination of two or more of X, Y, and Z, such as XYZ, XYY, YZ, and ZZ. As used herein, the term "and / or" includes any and all combinations of one or more of the associated items.

[0088] It should be noted that, although the terms "first," "second," etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. Rather, these terms are used only to distinguish one element, component, region, layer and / or section from another element, component, region, layer and / or section. Thus, a first element, component, region, layer and / or section discussed below could be termed a second element, component, region, layer and / or section without departing from the teachings of the present disclosure.

[0089] Spatially relative terms, such as "upper," "lower," "left," "right," "middle," "side," "front," "back," "inside," "outside," and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Likewise, if elements in the figures are mirrored, elements described as below or beneath other elements or features would then be oriented above or over other elements or features.

[0090] Embodiments of the present disclosure provide a dimming method of a display panel, wherein the display panel comprises a dimming screen and a display screen, the dimming screen is arranged on the backlight side of the display screen and is configured to modulate the backlight of the display screen, the dimming screen comprises a plurality of dimming pixels, the display screen comprises a plurality of display pixels, the dimming method comprises: obtaining image data of an image to be displayed; determining initial dimming pixel data of each dimming pixel according to the image data; determining to-be-filtered dimming pixels in the dimming screen according to the initial dimming pixel data of each dimming pixel; determining a first filtering area according to the determined to-be-filtered dimming pixels, wherein the first filtering area is centered on the determined to-be-filtered dimming pixels, the first filtering area comprises a first preset number of dimming pixels in a first direction and a second direction, and the first direction and the second direction intersect; determining a filtering parameter of each dimming pixel in the first filtering area according to the relationship between each dimming pixel in the first filtering area and the initial dimming pixel data of each dimming pixel in the first filtering area; and updating the dimming pixel data of the to-be-filtered dimming pixels according to the filtering parameter of each dimming pixel in the first filtering area to obtain updated dimming pixel data. In the embodiments of the present disclosure, a dimming method of a display panel suitable for any precision range of double-screen misalignment is proposed, which can use a dynamic filtering algorithm for dimming in the case that the bonding deviation of the dimming screen and the display screen is unknown, so that better display quality can be obtained without increasing the amount of FPGA resources.

[0091] Figure 1 is a structural schematic diagram of a display panel provided by at least one embodiment of the present disclosure. As shown in Figure 1 the display panel 10 comprises a display screen 110, a dimming screen 120 and a backlight module 130. The dimming screen 120 is arranged between the backlight module 130 and the display screen 110. The backlight module 130 is arranged on the backlight side of the dimming screen 120 (i.e., the side of the dimming screen 120 away from the display screen 110) and is configured to provide backlight to the dimming screen 120. The display screen 110 and the dimming screen 120 are stacked, the dimming screen 120 is arranged on the backlight side of the display screen 110 (i.e., the side of the display screen 110 close to the backlight module 130) and is configured to modulate the backlight of the display screen 110, and the display screen 110 is configured to display an image. For example, the display area (active area) of the display screen 110 and the dimming area (active area) of the dimming screen 120 overlap each other, for example, having the same size in the length direction and the width direction.

[0092] For example, in embodiments of the present disclosure, the display panel 10 is a liquid crystal display panel, and the display screen 110 and the dimming screen 120 are also both liquid crystal screens. Embodiments of the present disclosure are not limited to the type, structure, etc. of the liquid crystal screen used to implement the display screen 110 and the dimming screen 120, for example, it can be a vertical electric field type or a horizontal electric field type, for example, when it is a horizontal electric field type, it can be an in-plane switching (IPS) type, an edge field switching (FFS) type, an advanced multi-dimensional switching (ADS) type, etc.

[0093] Likewise, embodiments of the present disclosure are not limited to the type, structure, etc. of the backlight module 130, for example, the backlight module 130 can be side incident or direct type, etc., and the light source used can be a cold cathode fluorescent lamp, etc., or a light emitting diode (LED).

[0094] Figures 2A-2C respectively, Figure 1 schematically shows the pixel distribution (pixel array) of the display screen and the dimming screen in the display panel shown in FIG. 1, wherein Figures 2A-2C schematically shows different alignment states.

[0095] As shown in FIG. 2, Figures 2A-2C The dimming region of the dimming screen 120 can include a plurality of dimming pixels A, which can be arranged in M rows and N columns, M and N are both positive integers, 3≤M, 3≤N. For the sake of simplicity, a plurality of gate lines, a plurality of data lines for each dimming pixel A, and a pixel electrode included in each dimming pixel A are omitted in the figure, these gate lines and data lines cross each other to thereby define a plurality of pixel regions for each dimming pixel A, and the shape of these gate lines and / or data lines defines the shape of these pixel regions, and in each dimming pixel A, the shape of the pixel electrode can have substantially the same shape as the pixel region. For example, as shown in FIG. 3, Figure 2A The shape of each dimming pixel A of the dimming screen 120 can be a "V" shape; corresponding to the "V" shape, the gate line for the dimming pixel A is zigzag-shaped and the data line is straight-shaped. For example, in some embodiments, the dimming screen 120 is a full high-definition (FHD) liquid crystal screen with a 2K resolution, and the dimming screen 120 can include 1080*1920 dimming pixels, at this time, M=1080, N=1920. For example, the dimming screen 120 can include 964*363 dimming pixels, at this time, M=964, N=363.

[0096] The display region of the display screen 110 can include a plurality of display pixels B, which can be arranged in aM rows aN columns, a being a positive integer. For the sake of simplicity, a plurality of gate lines, a plurality of data lines for each display pixel B, and a pixel electrode included in each display pixel B are omitted in the figure, the gate lines and the data lines cross each other to thereby define a plurality of pixel regions for each display pixel B, and the shape of the gate lines and / or the data lines defines the shape of the pixel regions, and in each display pixel B, the shape of the pixel electrode can have substantially the same shape as the pixel region. For example, as shown in FIG. 3, the shape of each display pixel B of the display screen 110 can be rectangular; corresponding to the rectangle, the gate line for the display pixel B is linear and the data line is also linear. For example, in some embodiments, the display screen 110 is an ultra-high-definition liquid crystal screen with a 4K resolution, and the display screen 110 can include 2160*3840 display pixels, in which case M=1080, N=1920, and a=2. For example, the display screen 110 can include 1920*720 display pixels, in which case M=1920, N=720, and a is approximately equal to 2. Figure 2A

[0097] In some embodiments, when a=2, one row of light-adjusting pixels of the light-adjusting screen 120 can correspond to two rows of display pixels of the display screen 110. For example, the light-adjusting pixels in the mth row of the light-adjusting screen 120 can correspond to the display pixels in the 2m-1th row and the 2mth row of the display screen 110, 1≤m≤M.

[0098] When a=2, one column of light-adjusting pixels of the light-adjusting screen 120 can correspond to two columns of display pixels of the display screen 110. For example, the light-adjusting pixels in the nth column of the light-adjusting screen 120 can correspond to the display pixels in the 2n-1th column and the 2nth column of the display screen 110, 1≤n≤N.

[0099] That is, one light-adjusting pixel in the mth row and the nth column of the light-adjusting screen 120 can correspond to four display pixels of the display screen 110, which are respectively located in the 2m-1th row and the 2n-1th column, the 2m-1th row and the 2nth column, the 2mth row and the 2n-1th column, and the 2mth row and the 2nth column of the display screen 110.

[0100] It should be noted that, since the shape of the light-adjusting pixels of the light-adjusting screen 120 is a "V" shape and the shape of the display pixels of the display screen 110 is a square, in the column direction of the light-adjusting pixels of the light-adjusting screen 120 (as shown by the direction Y in the figure), in the physical position, one row of light-adjusting pixels of the light-adjusting screen 120 actually spans four rows of display pixels of the display screen 110, that is, the orthographic projection of one row of light-adjusting pixels of the light-adjusting screen 120 on the display screen 110 partially overlaps with the corresponding four rows of display pixels of the display screen 110.

[0101] ​For example, the light-adjusting pixels of the mth row of the light-adjusting screen 120 can span the display pixels of the 2m-2th row to the 2m+1th row of the display screen 110, i.e., the orthographic projection of the light-adjusting pixels of the mth row of the light-adjusting screen 120 on the display screen 110 partially overlaps with the display pixels of the 2m-2th row to the 2m+1th row of the display screen 110, but here it is specified that the light-adjusting pixels of the mth row of the light-adjusting screen 120 correspond to the display pixels of the 2m-1th row and the 2mth row of the display screen 110.

[0102] In addition, it should be noted that although the shape of the light-adjusting pixels in the light-adjusting screen is shown as a "V" shape in Figures 2A-2C , the embodiments of the present disclosure are obviously not limited thereto, and the shape of the light-adjusting pixels in the light-adjusting screen can be other appropriate shapes other than a "V" shape. Similarly, although the shape of the display pixels in the display screen is shown as a rectangle in Figures 2A-2C , the embodiments of the present disclosure are obviously not limited thereto, and the shape of the display pixels in the display screen can be other appropriate shapes other than a rectangle, for example, a hexagon, etc. In the embodiments of the present disclosure, the shape of the light-adjusting pixels is a "V" shape, and the shape of the display pixels is a rectangle, which can avoid the generation of rainbow stripes due to the superposition of the two screens.

[0103] In addition, it should be noted that although the correspondence between the light-adjusting pixels of the light-adjusting screen and the display pixels of the display screen is only shown when α = 2 in Figures 2A-2C , the case where α takes other values is similar. For example, when α = 1, one row of light-adjusting pixels of the light-adjusting screen can correspond to one row of display pixels of the display screen, and one column of light-adjusting pixels of the light-adjusting screen can correspond to one column of display pixels of the display screen. For example, when α = 4, one row of light-adjusting pixels of the light-adjusting screen can correspond to four rows of display pixels of the display screen, and one column of light-adjusting pixels of the light-adjusting screen can correspond to four columns of display pixels of the display screen. The embodiments of the present disclosure do not limit the specific correspondence between the display pixels and the light-adjusting pixels, but for the sake of simplicity, the embodiments of the present disclosure are described below only by taking α = 2 as an example, and the case where α takes other values can be referred to the description of the embodiments of the present disclosure when α = 2.

[0104] Figure 3 is a general flowchart of a light-adjusting method of a display panel according to the embodiments of the present disclosure. Figure 4 is a flowchart of a light-adjusting method of a display panel according to some exemplary embodiments of the present disclosure, which mainly corresponds to the steps performed in the light-adjusting pixel data processing module shown in Figure 3

[0105] Referring to Figure 3 and Figure 4 ​In embodiments of the present disclosure, the dimming method of the display panel can mainly include a pre-processing step performed in a pre-processing module, a dimming pixel data processing step performed in a dimming pixel data processing module, and a display pixel data processing step performed in a display pixel data processing module. It should be noted that the dimming method of the display panel provided by the embodiments of the present disclosure can also include some other steps, for example, a dither step performed in a dither module.

[0106] In embodiments of the present disclosure, in the pre-processing step performed in the pre-processing module, resolution conversion and RGB-to-HSV color space conversion can be performed. For example, in some exemplary embodiments, the effective display pixels of the dimming screen are 964*363, the effective display pixels of the display screen are 1920*720, and the ratio of the pixel size (for example, the size along the first direction and the size along the second direction) of the dimming screen to the display screen is 2:1. For example, the resolution of the input image (for example, the image to be displayed) is 1920*720, in which case, in order to make each pixel of the dimming screen have a sampling value, the resolution of the input image needs to be expanded to 1928*726. For example, the copying of the starting row / column can be performed according to the case of no error position of the double screen, and the specific method is as follows:

[0107] Padding(1:2, :) = V(1, :); Padding(723:726, :) = V(720, :);

[0108] Padding(:, 1:4) = V(:, 1); Padding(:, 1925:1928) = V(:, 1920);

[0109] wherein Padding represents expansion, that is, the image data of the first row of the input image with a resolution of 1920*720 is expanded upward by 2 rows, and the image data of the 720th row of the input image is expanded downward by 4 rows; the image data of the first column of the input image is expanded leftward by 4 columns, and the image data of the 1920th column of the input image is expanded rightward by 4 columns.

[0110] After the resolution conversion is completed, the image data of the input image can be converted from the RGB space to the HSV space to facilitate the use of the dimming screen.

[0111] In embodiments of the present disclosure, in the dimming pixel data processing step performed in the dimming pixel data processing module, dimming pixel data downsampling, special pattern detection, spatial filtering and the like can be performed.

[0112] With reference to Figures 1-4 , the dimming method of the display panel can include operations S410-S460.

[0113] In operation S410, image data of an image to be displayed is acquired. For example, the image to be displayed can be an input image with a resolution of 1920*720, and the image data can be image data of the input image after the above-mentioned expansion and spatial conversion into the HSV space.

[0114] In operation S420, initial light modulation pixel data of each light modulation pixel is determined according to the image data.

[0115] For example, the light modulation pixel data can include a lightness in the HSV space, i.e., a V value.

[0116] In an embodiment of the present disclosure, a direct projection of one light modulation pixel on the display screen at least partially overlaps a plurality of display pixels arranged in m rows and m columns, m being a positive integer greater than 1, for example, m = 2.

[0117] In operation S420, the determination of the initial light modulation pixel data of each light modulation pixel according to the image data specifically includes: determining initial display pixel data of each display pixel according to the image data; and determining initial light modulation pixel data of the light modulation pixel overlapping the plurality of display pixels arranged in m rows and m columns according to the initial display pixel data of the plurality of display pixels arranged in m rows and m columns.

[0118] Specifically, the determination of the initial light modulation pixel data of the light modulation pixel overlapping the plurality of display pixels arranged in m rows and m columns according to the initial display pixel data of the plurality of display pixels arranged in m rows and m columns specifically includes: sampling the plurality of display pixels arranged in m rows and m columns row by row to obtain sampling data of each row, wherein the sampling data of each row is a weighted sum result of a maximum value and an average value in the initial display pixel data of the plurality of display pixels in the row; and taking a maximum value in the m rows of sampling data as the initial light modulation pixel data of the light modulation pixel.

[0119] Figure 5 is a schematic diagram of a filtering region used in a light modulation method of a display panel according to an embodiment of the present disclosure. For a detailed description, see Figures 1-5 Taking an example of each light modulation pixel corresponding to four display pixels (2 rows*2 columns) of the display screen, the sampling process can be as follows:

[0120] (1) Calculation of the first row of two pixels: read in the first row of data, calculate the maximum value and the average value, and mark them as Vmax and Vmean respectively. The intermediate calculation process is as follows:

[0121] nmax = NVmax*Vmax;

[0122] nmean = NVmean*Vmean;

[0123] The first row sampling result: weighted maximum and average, KVmax is the weighted coefficient, and K_L1 is the first row sampling weight:

[0124] VL1 = K_L1 * (KVmax * nmax + (1-KVmax) * nmean);

[0125] (2) The second row calculation: IP reads the second row data, and the calculation method is the same as that of the first row. The second row sampling result is:

[0126] VL2 = K_L2 * (KVmax * nmax + (1-KVmax) * nmean);

[0127] K_L2 is the first row sampling weight,

[0128] The maximum value of VL2 and VL1 is the sampling result of the dimming pixel.

[0129] In operation S430, the to-be-filtered dimming pixels in the dimming screen are determined according to the initial dimming pixel data of each dimming pixel.

[0130] Figure 2C The state in which the display screen is offset by one pixel to the upper left of the dimming screen is schematically shown. Figure 9A Figure 2C The state shown corresponds to a display effect diagram. Refer to Figure 2C and Figure 9A When the display screen is offset by one pixel to the upper left of the dimming screen, because the backlight corresponding to the bright content after the offset is not large enough, a dark shadow appears at the edge of the bright content (as shown in the dotted line box on the upper left and left sides), and because the backlight corresponding to the dark content is larger than the backlight below, a bright shadow appears on the dark content (as shown in the dashed line box on the lower left and right sides). In an embodiment of the present disclosure, to solve the problem of the dark shadow around the bright content at the bright-dark interface under the misalignment, the backlight around the bright content is increased, and to make the bright shadow on the dark content smooth and have a smaller background gray scale contrast, the backlight at the bright-dark interface should be as smooth as possible.

[0131] In an embodiment of the present disclosure, the luminance (V value) of the dimming pixel at the bright-dark interface is brightened and the luminance (V value) of the dimming pixel is smoothly transitioned from bright to dark according to the image data of the to-be-displayed image. For example, when filtering, the filter parameters can be adaptively adjusted according to the pixel gray scale values covered by the 5*5 filter template, the distance of each pixel from the filter center, and the gray scale contrast between each pixel and the center pixel, so as to both increase the luminance (V value) of the dimming pixel at the bright-dark interface and make the luminance (V value) of the dimming pixel after filtering relatively smooth.

[0132] ​In other words, in the embodiments of this disclosure, the dimming pixel to be filtered in the dimming screen can be determined based on the initial dimming pixel data of each dimming pixel. For example, at least one dimming pixel at the boundary between light and dark can be determined as the dimming pixel to be filtered in the dimming screen.

[0133] Optionally, in embodiments of this disclosure, before determining the pixels to be filtered and dimmed in the dimming screen, the dimming method may also perform special pattern detection, for example, bright line detection, such as... Figure 2B As shown. It should be understood that various known bright line detection methods can be used for bright line detection, and then data dilation can be used to compensate for the bright lines. For specific methods, please refer to existing bright line compensation methods, which will not be elaborated here.

[0134] Optionally, in embodiments of this disclosure, before determining the dimming pixel to be filtered in the dimming screen, the dimming pixel data of the pixel can be judged. For example, the pixel can be taken as the center of the filtering area. When the dimming pixel data (e.g., grayscale value) of the dimming pixel at the center is the maximum value of the dimming pixel data (e.g., grayscale value) of each dimming pixel in the filtering area, the following filtering steps may not be performed.

[0135] In operation S440, a first filtering region is determined based on the identified dimming pixels to be filtered. The first filtering region is centered on the identified dimming pixels to be filtered, and includes a first preset number of dimming pixels in both a first direction and a second direction. The first direction and the second direction intersect. For example, the first direction could be... Figure 2A The X direction or row direction shown can be the second direction. Figure 2A The Y direction or column direction is shown. Figure 5 A first filtering region 50 is schematically shown, such as Figure 5 The rounded rectangle in the image is shown.

[0136] In the embodiments of this disclosure, determining the filtering parameters of each dimming pixel in the first filtering region based on the relationship between each dimming pixel in the first filtering region and the initial dimming pixel data of each dimming pixel in the first filtering region specifically includes: determining the first filtering coefficient K1 of each dimming pixel in the first filtering region based on the initial dimming pixel data of each dimming pixel in the first filtering region, wherein the first filtering coefficient of each dimming pixel in the first filtering region is positively correlated with the initial dimming pixel data of each dimming pixel in the first filtering region.

[0137] For example, determining the first filter coefficient of each dimming pixel in the first filter region based on the initial dimming pixel data of each dimming pixel in the first filter region specifically includes:

[0138] determine the first filter coefficient of each dimming pixel in the first filter region according to the initial dimming pixel data of each dimming pixel in the first filter region by using a first filter coefficient formula,

[0139] wherein the first filter coefficient formula is:

[0140]

[0141] wherein V is the initial dimming pixel data of each dimming pixel.

[0142] Figure 6 A relationship curve between the first filter coefficient and the dimming pixel data is schematically shown. Refer to Figure 6 In the embodiments of the present disclosure, the greater the dimming pixel data (e.g. the brightness of the dimming pixel, i.e. the value of V) is, the greater the influence on the filter value is, i.e. the first filter coefficient is proportional to the dimming pixel data, and when the dimming pixel data is close to 255, it is expected that the contribution to the filter value is approximately 1. In this way, the dimming pixels around the bright dimming pixel can be made as bright as possible, so that when the bright content is misaligned, its brightness can also be large enough.

[0143] In the embodiments of the present disclosure, the determining the filter parameter of each dimming pixel in the first filter region according to the relationship between each dimming pixel in the first filter region and the initial dimming pixel data of each dimming pixel in the first filter region specifically comprises: determining a second filter coefficient K2 of each dimming pixel in the first filter region according to a first contrast curve, wherein the first contrast is the ratio between the initial dimming pixel data of the dimming pixel to be filtered and the initial dimming pixel data of each dimming pixel in the first filter region, and the first contrast curve represents the relationship between the second filter coefficient and the first contrast.

[0144] Figure 7 A first contrast curve used in the dimming method of the display panel according to the embodiments of the present disclosure is schematically shown. Refer to Figure 7 In the first contrast curve, when the first contrast is in the interval of [0, 1], the second filter coefficient K2 is negatively related to the first contrast; when the first contrast is greater than or equal to 1, the second filter coefficient K2 is equal to 1.

[0145] Since the brightening degree of the dimming pixel at the bright-dark boundary is related to the gray scale value of the bright content, the relationship between the filter center and the neighboring position pixels should be considered when filtering. In the embodiments of the present disclosure, the first contrast is used to represent this relationship. For example, refer to Figure 5The first contrast ratio can be defined as a ratio of a gray scale value of the dimming pixel at the center of the 5*5 template (i.e., each dimming pixel in the first filter area) to a gray scale value of each dimming pixel at a position covered by the 5*5 template. The smaller the first contrast ratio, the more the gray scale value of the dimming pixel at the center is smaller than the gray scale value of each dimming pixel at the position covered by the 5*5 template. In this case, the filter weight of each dimming pixel at the position covered by the 5*5 template should be larger, so that the gray scale value of the dimming pixel at the center can be closer to the bright content.

[0146] In the embodiments of the present disclosure, the determining the filter parameter of each dimming pixel in the first filter area according to the relationship between each dimming pixel in the first filter area and the initial dimming pixel data of each dimming pixel in the first filter area specifically comprises: determining a third filter coefficient K3 of each dimming pixel in a second filter area according to a second contrast ratio curve, wherein the second filter area is centered on the determined dimming pixel to be filtered, the second filter area includes a second preset number of dimming pixels in the first direction and the second direction, the second preset number is smaller than the first preset number, a second contrast ratio is a ratio between a maximum value of the initial dimming pixel data of each dimming pixel in the second filter area and the initial dimming pixel data of each dimming pixel in the second filter area, and the second contrast ratio curve represents a relationship between the third filter coefficient and the second contrast ratio.

[0147] Figure 8 The second contrast ratio curve used in the dimming method of the display panel according to the embodiments of the present disclosure is schematically shown. Refer to Figure 8 In the second contrast ratio curve, the third filter coefficient K3 is negatively correlated with the second contrast ratio.

[0148] By setting the first filter coefficient K1 and the second filter coefficient K2 as described above, the dimming pixels with smaller gray scale values than the dimming pixel at the center still have a certain weight, which may not make the gray scale value or the brightness of the dimming pixels at the bright-dark boundary increase enough. In this step, the weight of the dimming pixels with smaller gray scale values than the dimming pixel at the center can be further reduced to further reduce the influence of the dimming pixels with smaller gray scale values than the dimming pixel at the center on the filter result. Based on this, the third filter coefficient K3 can be determined according to the second contrast ratio. For example, the second contrast ratio can be defined as a ratio of a maximum value of the gray scale values of a 3*3 area centered on the center of the first filter area to the gray scale values at each position of the 3*3 area. The larger the second contrast ratio, the more the dimming pixels at the corresponding positions are smaller than the dimming pixel at the center, and the smaller the filter coefficient of the dimming pixels at the corresponding positions will be.

[0149] In the embodiments of the present disclosure, the determining the filtering parameter of each dimming pixel in the first filtering region according to the relationship between each dimming pixel in the first filtering region and the initial dimming pixel data of each dimming pixel in the first filtering region specifically comprises: determining a fourth filtering coefficient K4 of each dimming pixel in the first filtering region according to a distance between each dimming pixel in the first filtering region and the dimming pixel to be filtered, wherein the fourth filtering coefficient of each dimming pixel in the first filtering region is negatively correlated with the distance between each dimming pixel in the first filtering region and the dimming pixel to be filtered.

[0150] Table 1 is a fourth filtering coefficient table of dimming pixels at each position of a 5*5 template coverage. As shown in Table 1, the fourth filtering coefficient of each dimming pixel in the first filtering region is negatively correlated with the distance between each dimming pixel in the first filtering region and the dimming pixel to be filtered, for example, the fourth filtering coefficient K4 of the dimming pixel at the center is 52, the fourth filtering coefficient K4 of the 4 dimming pixels adjacent to the dimming pixel at the center in the first direction or the second direction is 25, the fourth filtering coefficient K4 of the 6 dimming pixels farther from the dimming pixel at the center is 10, the fourth filtering coefficient K4 of the 10 dimming pixels farther from the dimming pixel at the center is 3, and the fourth filtering coefficient K4 of the 4 dimming pixels farthest from the dimming pixel at the center (i.e., the dimming pixels at the 4 corners) is 1.

[0151] Table 1 fourth filtering coefficient table of dimming pixels at each position of a 5*5 template coverage

[0152] 1 3 10 3 1 3 10 25 10 3 3 25 52 25 3 3 10 25 10 3 1 3 10 3 1

[0153] In operation S450, the filtering parameter of each dimming pixel in the first filtering region is determined according to the relationship between each dimming pixel in the first filtering region and the initial dimming pixel data of each dimming pixel in the first filtering region.

[0154] In the embodiments of the present disclosure, the determining the filter parameter of each dimming pixel in the first filter region according to the relationship between each dimming pixel in the first filter region and the initial dimming pixel data of each dimming pixel in the first filter region specifically comprises: determining the filter coefficient K of each dimming pixel in the first filter region according to the first filter coefficient K1, the second filter coefficient K2, the third filter coefficient K3 and the fourth filter coefficient K4; normalizing the filter coefficient K of each dimming pixel in the first filter region to obtain the normalized filter coefficient KA of each dimming pixel in the first filter region; calculating the sum KAS of the normalized filter coefficient KA of each dimming pixel in the first filter region; and dividing the normalized filter coefficient KA of each dimming pixel in the first filter region by the sum KAS to obtain the filter parameter of each dimming pixel in the first filter region.

[0155] In operation S460, the dimming pixel data of the dimming pixel to be filtered is updated according to the filter parameter of each dimming pixel in the first filter region to obtain updated dimming pixel data.

[0156] For example, the initial dimming pixel data of each dimming pixel in the 5*5 template position can be weighted and averaged according to the filter parameter of each dimming pixel in the 5*5 template position as a weight coefficient, and the result of the weighted and averaged is taken as the dimming pixel data of the dimming pixel to be filtered.

[0157] Through such updating, the dimming pixel data (such as gray scale value or brightness) of each dimming pixel at the bright-dark junction can be improved, and meanwhile the updated dimming pixel data (such as gray scale value or brightness) can be relatively smooth. Figure 9B The display effect diagram according to the updated dimming pixel data is schematically shown. For comparison, the display effect diagram of the original display pixel data is shown in FIG. 5. Figure 9A and Figure 9B It can be seen that the dark shadow around the bright content disappears, and the bright shadow on the dark content is basically invisible.

[0158] It should be noted that in the above embodiments, the first preset number is 5, and the second preset number is 3, that is, the first filter region is a 5*5 region, and the second filter region is a 3*3 region. However, the embodiments of the present disclosure are not limited thereto, and in other embodiments, filter regions of other sizes can be selected.

[0159] Referring to Figure 3 In the embodiments of the present disclosure, in the display pixel data processing step performed in the display pixel data processing module, backlight calculation of the display screen, data compensation of the display pixel and the like can be performed.

[0160] Referring to Figure 1The display panel further comprises a backlight source arranged on a side of the light-adjusting screen away from the display screen and configured to provide backlight, the display screen comprises a plurality of display partitions, the backlight source comprises a plurality of backlight partitions, the plurality of display partitions correspond to the plurality of backlight partitions one by one, and the display partition comprises a plurality of display pixels.

[0161] In an embodiment of the present disclosure, the light-adjusting method further comprises: determining a display partition requiring light adjustment and a backlight partition corresponding to the display partition requiring light adjustment according to a display pixel to be light-adjusted; determining a plurality of light-adjusting pixels corresponding to the display partition requiring light adjustment; and determining a backlight value of the backlight partition corresponding to the display partition requiring light adjustment according to updated light-adjusting pixel data of the plurality of light-adjusting pixels corresponding to the display partition requiring light adjustment.

[0162] In an embodiment of the present disclosure, the plurality of light-adjusting pixels corresponding to the display partition requiring light adjustment comprises a first light-adjusting pixel, a second light-adjusting pixel and a third light-adjusting pixel, a projection of the first light-adjusting pixel on the display screen at least partially overlaps at least one of the plurality of display pixels in the display partition requiring light adjustment, the second light-adjusting pixel and the third light-adjusting pixel are respectively adjacent to the first light-adjusting pixel in a second direction, and the second light-adjusting pixel and the third light-adjusting pixel are located on opposite sides of the first light-adjusting pixel in the second direction.

[0163] For example, the determination of the backlight value of the backlight partition corresponding to the display partition requiring light adjustment according to the updated light-adjusting pixel data of the plurality of light-adjusting pixels corresponding to the display partition requiring light adjustment specifically comprises: determining the backlight value of the backlight partition corresponding to the display partition requiring light adjustment according to the updated light-adjusting pixel data of the plurality of light-adjusting pixels corresponding to the display partition requiring light adjustment by means of weighted summation.

[0164] Figure 10 An illustrative diagram for backlight correction is schematically shown. In combination with reference to Figure 1 , Figure 2C and Figure 10 , the backlight value corresponding to each display pixel in the display screen can be obtained by weighting the six adjacent light-adjusting pixels, for example, in Figure 10In the embodiment, the backlight values corresponding to the display pixels a, b, c and d can be obtained by weighting the dimming pixel data (for example, gray scale value or brightness) of the six dimming pixels S22, S23, S24, S32, S33 and S34. For example, the backlight values corresponding to the display pixels a and c can be obtained by weighting the dimming pixel data (for example, gray scale value or brightness) of the dimming pixels S23, S33, S22 and S32. The backlight values corresponding to the display pixels a and c can be obtained by weighting the dimming pixel data (for example, gray scale value or brightness) of the dimming pixels S23, S24, S33 and S34. The specific calculation formula can be as follows:

[0165] SBL(a) = a1*VS22 + a2*VS23 + a3*VS32 + a4*VS33,

[0166] SBL(c) = c1*VS22 + c2*VS23 + c3*VS32 + c4*VS33,

[0167] SBL(b) = b1*VS23 + b2*VS24 + b3*VS33 + b4*VS34,

[0168] SBL(d) = d1*VS23 + d2*VS24 + d3*VS33 + d4*VS34,

[0169] wherein SBL(a), SBL(c), SBL(b) and SBL(d) are respectively the backlight values corresponding to the display pixels a, c, b and d; VS22, VS23, VS24, VS32, VS33 and VS34 are respectively the dimming pixel data (for example, gray scale value or brightness) of the dimming pixels S22, S23, S24, S32, S33 and S34, which should be understood as the values updated by the above method; a1-a4, c1-c4, b1-b4 and d1-d4 are respectively the corresponding weight coefficients, which are all preset values.

[0170] Further, in the embodiment of the present disclosure, the dimming method further comprises: determining the initial display pixel data of the display pixel to be dimmed according to the image data; and determining the compensation coefficient of the display pixel to be dimmed according to the initial display pixel data of the display pixel to be dimmed and the backlight value of the backlight partition corresponding to the display pixel to be dimmed.

[0171] For example, the compensation coefficient of the display pixel to be dimmed can be determined according to the initial display pixel data of the display pixel to be dimmed and the backlight value of the backlight partition corresponding to the display pixel to be dimmed by using the compensation coefficient formula,

[0172] The compensation coefficient formula is:

[0173]

[0174] wherein Q is a compensation coefficient, W is initial display pixel data, SBL is a backlight value, f represents rounding, γ0, γ1, γ2 are preset values.

[0175] In embodiments of the present disclosure, the dimming method further includes adjusting display pixel data of the to-be-dimmed display pixel according to the determined compensation coefficient of the to-be-dimmed display pixel.

[0176] For example, the display pixel data of the to-be-dimmed display pixel can be adjusted according to the determined compensation coefficient of the to-be-dimmed display pixel according to the following formula:

[0177]

[0178] wherein Q(R, G, B) is the adjusted display pixel data in the RGB space; Input(R, G, B) is the display pixel data before adjustment in the RGB space.

[0179] Based on the above dimming method, embodiments of the present disclosure further provide a dimming device of a display panel. The following will be described in detail Figure 11 with reference to the dimming device of the display panel.

[0180] Figure 11 A structural block diagram of the dimming device of the display panel according to embodiments of the present disclosure is schematically shown.

[0181] As Figure 11 shown, the dimming device 800 of the display panel of the present embodiment includes an image data acquisition module 810, an initial dimming pixel data determination module 820, a to-be-filtered dimming pixel determination module 830, a first filtering region determination module 840, a filtering parameter determination module 850, and a dimming pixel data update module 860.

[0182] The image data acquisition module 810 is configured to acquire image data of a to-be-displayed image. In some embodiments, the image data acquisition module 810 can be configured to perform the operation S410 described above, and details are not repeated here.

[0183] The initial dimming pixel data determination module 820 is configured to determine initial dimming pixel data of each dimming pixel according to the image data. In some embodiments, the initial dimming pixel data determination module 820 can be configured to perform the operation S420 described above, and details are not repeated here.

[0184] The to-be-filtered dimming pixel determination module 830 is configured to determine to-be-filtered dimming pixels in the dimming screen according to the initial dimming pixel data of each dimming pixel. In some embodiments, the to-be-filtered dimming pixel determination module 830 can be configured to perform the operation S430 described above, and details are not repeated here. ​

[0185] The first filtering region determination module 840 is configured to determine a first filtering region according to the determined dimming pixel to be filtered, wherein the first filtering region is centered on the determined dimming pixel to be filtered, and the first filtering region includes a first preset number of dimming pixels in a first direction and a second direction, and the first direction and the second direction intersect. In some embodiments, the first filtering region determination module 840 can be configured to perform the operation S440 described above, and details are not described herein again.

[0186] The filtering parameter determination module 850 is configured to determine a filtering parameter of each dimming pixel in the first filtering region according to a relationship between the dimming pixels in the first filtering region and initial dimming pixel data of each dimming pixel in the first filtering region. In some embodiments, the filtering parameter determination module 850 can be configured to perform the operation S450 described above, and details are not described herein again.

[0187] The dimming pixel data updating module 860 is configured to update the dimming pixel data of the dimming pixel to be filtered according to the filtering parameter of each dimming pixel in the first filtering region, to obtain updated dimming pixel data. In some embodiments, the dimming pixel data updating module 860 can be configured to perform the operation S460 described above, and details are not described herein again.

[0188] According to embodiments of this disclosure, any and multiple modules among the image data acquisition module 810, the initial dimming pixel data determination module 820, the dimming pixel determination module 830, the first filtering region determination module 840, the filtering parameter determination module 850, and the dimming pixel data update module 860 can be combined into one module, or any one of these modules can be split into multiple modules. Alternatively, at least some of the functions of one or more of these modules can be combined with at least some of the functions of other modules and implemented in one module. According to embodiments of this disclosure, at least one of the image data acquisition module 810, the initial dimming pixel data determination module 820, the pixel to be filtered dimming determination module 830, the first filtering region determination module 840, the filtering parameter determination module 850, and the dimming pixel data update module 860 can be at least partially implemented as hardware circuits, such as field-programmable gate arrays (FPGAs), programmable logic arrays (PLAs), systems-on-a-chip, systems-on-a-substrate, systems-on-package, application-specific integrated circuits (ASICs), or any other reasonable means of integrating or packaging circuits, or implemented in software, hardware, or firmware, or in any suitable combination of any of these three implementation methods. Alternatively, at least one of the image data acquisition module 810, the initial dimming pixel data determination module 820, the pixel to be filtered dimming determination module 830, the first filtering region determination module 840, the filtering parameter determination module 850, and the dimming pixel data update module 860 can be at least partially implemented as a computer program module, which can perform corresponding functions when the computer program module is run.

[0189] Figure 12 A schematic diagram of a display device suitable for implementing the dimming method described above, according to an embodiment of the present disclosure, is shown.

[0190] like Figure 12 As shown, the display device 900 according to an embodiment of this disclosure may include, for example: Figure 1 The display panel, processor 901, and storage device 902 shown can perform various appropriate actions and processes according to the program stored in the storage device 902. The processor 901 may include, for example, a general-purpose microprocessor (e.g., a CPU), an instruction set processor, and / or an associated chipset and / or a special-purpose microprocessor (e.g., an application-specific integrated circuit (ASIC)), etc. The processor 901 may also include onboard memory for caching purposes. The processor 901 may include a single processing unit or multiple processing units for performing different actions of the method flow according to embodiments of this disclosure.

[0191] The display device can include any device or product having a display function. For example, the display device can be a smartphone, a mobile phone, an e-book reader, a desktop PC, a laptop PC, a netbook PC, a personal digital assistant (PDA), a portable multimedia player (PMP), a digital audio player, a mobile medical device, a camera, a wearable device (e.g., a head-mounted device, electronic clothing, an electronic bracelet, an electronic necklace, electronic accessories, an electronic tattoo, or a smartwatch), a television, or the like.

[0192] It should be understood that the display device according to the embodiments of the disclosure has all the features and advantages of the display panel described above, and specific reference can be made to the description above.

[0193] The disclosure also provides a computer-readable storage medium, which can be included in the device / apparatus / system described in the above embodiments, or can exist separately without being assembled into the device / apparatus / system. The computer-readable storage medium carries one or more programs, which, when executed, implement the method according to the embodiments of the disclosure.

[0194] According to the embodiments of the disclosure, the computer-readable storage medium can be a non-volatile computer-readable storage medium, which can include, but is not limited to, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any appropriate combination thereof. In this disclosure, the computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0195] The embodiments of the disclosure also include a computer program product, which includes a computer program containing program codes for executing the methods shown in the flowcharts. When the computer program product is run in a computer system, the program codes are used to make the computer system implement the item recommendation method provided by the embodiments of the disclosure.

[0196] The above functions defined in the system / apparatus of the embodiments of the disclosure are performed when the computer program is executed by the processor 901. According to the embodiments of the disclosure, the system, apparatus, module, unit, etc. described above can be implemented by computer program modules.

[0197] In one embodiment, the computer program can be tangibly embodied in a non-transitory computer readable medium. In another embodiment, the computer program can be tangibly embodied in a signal that can be downloaded and installed by a communication unit. The computer program can include program codes and / or instructions that can be executed by the processor 901 to implement the above-described functions defined in the system of the embodiments of the present disclosure. According to the embodiments of the present disclosure, the system, device, apparatus, module, unit, etc. described above can be implemented by computer program modules.

[0198] In such an embodiment, the computer program can be downloaded and installed from a network, and / or installed from a removable medium, by the communication unit. When the computer program is executed by the processor 901, the above-described functions defined in the system of the embodiments of the present disclosure are performed. According to the embodiments of the present disclosure, the system, device, apparatus, module, unit, etc. described above can be implemented by computer program modules.

[0199] According to the embodiments of the present disclosure, the program code for executing the computer program provided by the embodiments of the present disclosure can be written in any combination of one or more programming languages, and specifically, these computer programs can be implemented using high-level procedural and / or object-oriented programming language, and / or assembly / machine language. The programming language includes, but is not limited to, such as Java, C++, python, "C" language or similar programming language. The program code can be executed entirely on a user computing device, partially on a user device, partially on a remote computing device, or entirely on a remote computing device or server. In the case involving a remote computing device, the remote computing device can be connected to the user computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (for example, connected through the Internet by using an Internet service provider).

[0200] The flowcharts and block diagrams in the drawings illustrate the possible architectures, functionality, and operations of systems, methods, and computer program products in accordance with various embodiments of the present disclosure. In this regard, each block in the flowcharts or block diagrams can represent a module, a segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks noted in succession can in fact be executed substantially concurrently or in the reverse order, depending on the functionality involved. It will also be noted that each block in the block diagrams or flowcharts, and combinations of blocks in the block diagrams or flowcharts, can be implemented by dedicated hardware-based systems that perform the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0201] While some embodiments of the general inventive concept of the present disclosure have been shown and described, it is to be understood that changes can be made in the embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims

1. A dimming method for a display panel, wherein, The display panel includes a dimming screen and a display screen. The dimming screen is disposed on the backlight side of the display screen and configured to backlight the display screen. The dimming screen includes a plurality of dimming pixels, and the display screen includes a plurality of display pixels. The dimming method includes: Get the image data of the image to be displayed; The initial dimming pixel data for each dimming pixel is determined based on the image data; The dimming pixels to be filtered in the dimming screen are determined based on the initial dimming pixel data of each dimming pixel. A first filtering region is determined based on the identified dimming pixel to be filtered, wherein the first filtering region is centered on the identified dimming pixel to be filtered, and the first filtering region includes a first preset number of dimming pixels in both a first direction and a second direction, and the first direction and the second direction intersect. Based on the relationship between the dimming pixels in the first filtering region and the initial dimming pixel data of each dimming pixel in the first filtering region, the filtering parameters of each dimming pixel in the first filtering region are determined; and The dimming pixel data of the dimming pixel to be filtered is updated according to the filtering parameters of each dimming pixel in the first filtering region to obtain updated dimming pixel data.

2. The dimming method for a display panel according to claim 1, wherein, The step of determining the filtering parameters of each dimming pixel in the first filtering region based on the relationship between each dimming pixel in the first filtering region and the initial dimming pixel data of each dimming pixel in the first filtering region specifically includes: The first filtering coefficient K1 of each dimming pixel in the first filtering region is determined based on the initial dimming pixel data of each dimming pixel in the first filtering region. In this context, the first filtering coefficient of each dimming pixel in the first filtering region is positively correlated with the initial dimming pixel data of each dimming pixel in the first filtering region.

3. The dimming method for a display panel according to claim 2, wherein, The step of determining the filtering parameters of each dimming pixel in the first filtering region based on the relationship between each dimming pixel in the first filtering region and the initial dimming pixel data of each dimming pixel in the first filtering region specifically includes: The second filtering coefficient K2 for each dimming pixel in the first filtering region is determined based on the first contrast curve. Wherein, the first contrast ratio is the ratio between the initial dimming pixel data of the dimming pixel to be filtered in the first filtering region and the initial dimming pixel data of each dimming pixel in the first filtering region, and the first contrast ratio curve represents the relationship between the second filtering coefficient and the first contrast ratio.

4. The dimming method for a display panel according to claim 3, wherein, The step of determining the filtering parameters of each dimming pixel in the first filtering region based on the relationship between each dimming pixel in the first filtering region and the initial dimming pixel data of each dimming pixel in the first filtering region specifically includes: The third filtering coefficient K3 for each dimming pixel in the second filtering region is determined based on the second contrast curve. The second filtering region is centered on the identified dimming pixel to be filtered, and includes a second preset number of dimming pixels in both the first and second directions. The second preset number is less than the first preset number. The second contrast ratio is the ratio between the maximum value of the initial dimming pixel data of each dimming pixel in the second filter region and the initial dimming pixel data of each dimming pixel in the second filter region. The second contrast ratio curve represents the relationship between the third filter coefficient and the second contrast ratio.

5. The dimming method for a display panel according to claim 4, wherein, The step of determining the filtering parameters of each dimming pixel in the first filtering region based on the relationship between each dimming pixel in the first filtering region and the initial dimming pixel data of each dimming pixel in the first filtering region specifically includes: The fourth filtering coefficient K4 of each dimming pixel in the first filtering region is determined based on the distance between each dimming pixel in the first filtering region and the dimming pixel to be filtered. Among them, the fourth filtering coefficient of each dimming pixel in the first filtering region is negatively correlated with the distance between each dimming pixel in the first filtering region and the dimming pixel to be filtered.

6. The dimming method for a display panel according to claim 2, wherein, The step of determining the first filtering coefficient of each dimming pixel in the first filtering region based on the initial dimming pixel data of each dimming pixel in the first filtering region specifically includes: The first filter coefficient formula is used to determine the first filter coefficient of each dimming pixel in the first filter region based on the initial dimming pixel data of each dimming pixel in the first filter region. The formula for the first filter coefficient is as follows: ， Where V represents the initial dimming pixel data for each dimming pixel.

7. The dimming method for a display panel according to claim 3, wherein, In the first contrast curve, when the first contrast is in the interval [0,1], the second filter coefficient K2 is negatively correlated with the first contrast; when the first contrast is greater than or equal to 1, the second filter coefficient K2 is equal to 1.

8. The dimming method for a display panel according to claim 4, wherein, In the second contrast curve, the third filter coefficient K3 is negatively correlated with the second contrast.

9. The dimming method for a display panel according to claim 5, wherein, The step of determining the filtering parameters of each dimming pixel in the first filtering region based on the relationship between each dimming pixel in the first filtering region and the initial dimming pixel data of each dimming pixel in the first filtering region specifically includes: The filtering coefficient K of each dimming pixel in the first filtering region is determined based on the first filtering coefficient K1, the second filtering coefficient K2, the third filtering coefficient K3, and the fourth filtering coefficient K4. The filtering coefficients K of each dimming pixel in the first filtering region are normalized to obtain the normalized filtering coefficients KA of each dimming pixel in the first filtering region. Calculate the sum of the normalized filter coefficients KA of each dimming pixel in the first filter region, KAS; and Divide the normalized filtering coefficient KA of each dimming pixel in the first filtering region by the sum of KAS to obtain the filtering parameters of each dimming pixel in the first filtering region.

10. The dimming method for a display panel according to claim 4, wherein, The first preset quantity is 5, and the second preset quantity is 3.

11. The dimming method for a display panel according to any one of claims 1-10, wherein, The display panel further includes a backlight source, which is disposed on the side of the dimming screen away from the display screen and configured to provide backlight. The display screen includes multiple display zones, and the backlight source includes multiple backlight zones. The multiple display zones correspond one-to-one with the multiple backlight zones, and each display zone includes multiple display pixels. The dimming method further includes: The display zones that need to be dimmed and the corresponding backlight zones are determined based on the display pixels to be dimmed. Determine the multiple dimming pixels corresponding to the display zones that require dimming; and Based on the updated dimming pixel data of multiple dimming pixels corresponding to the display zone that needs dimming, the backlight value of the backlight zone corresponding to the display zone that needs dimming is determined.

12. The dimming method for a display panel according to claim 11, wherein, The plurality of dimming pixels corresponding to the display zone requiring dimming include a first dimming pixel, a second dimming pixel, and a third dimming pixel. The orthographic projection of the first dimming pixel on the display screen at least partially overlaps with at least one of the plurality of display pixels in the display zone requiring dimming. The second dimming pixel and the third dimming pixel are respectively adjacent to the first dimming pixel in a second direction, and the second dimming pixel and the third dimming pixel are located on opposite sides of the first dimming pixel in the second direction.

13. The dimming method for a display panel according to claim 12, wherein, The step of determining the backlight value of the backlight zone corresponding to the display zone requiring dimming based on the updated dimming pixel data of the multiple dimming pixels corresponding to the display zone requiring dimming specifically includes: By using a weighted summation method, the backlight value of the backlight zone corresponding to the display zone that needs dimming is determined based on the updated dimming pixel data of multiple dimming pixels corresponding to the display zone that needs dimming.

14. The dimming method for a display panel according to claim 13, wherein, The dimming method further includes: The initial display pixel data of the display pixel to be dimmed is determined based on the image data; and The compensation coefficient of the display pixel to be dimmed is determined based on the initial display pixel data and the backlight value of the backlight zone corresponding to the display pixel to be dimmed.

15. The dimming method for a display panel according to claim 14, wherein, Using the compensation coefficient formula, the compensation coefficient of the display pixel to be dimmed is determined based on the initial display pixel data and the backlight value of the corresponding backlight zone. The formula for the compensation coefficient is: in, For compensation coefficient, To initially display pixel data, This is the backlight value. Indicates rounding down. , , This is the default value.

16. The dimming method for a display panel according to claim 15, wherein, The dimming method further includes: adjusting the display pixel data of the display pixel to be dimmed according to the determined compensation coefficient of the display pixel to be dimmed.

17. The dimming method for a display panel according to any one of claims 1-10 and 12-16, wherein, The orthographic projection of a dimming pixel on the display screen at least partially overlaps with a plurality of display pixels arranged in m rows and m columns, where m is a positive integer greater than 1; The step of determining the initial dimming pixel data for each dimming pixel based on the image data specifically includes: The initial display pixel data for each display pixel is determined based on the image data; as well as Based on the initial display pixel data of a plurality of display pixels arranged in m rows and m columns, the initial dimming pixel data of the dimming pixels that overlap with the plurality of display pixels arranged in m rows and m columns is determined.

18. The dimming method for a display panel according to claim 17, wherein, The step of determining the initial dimming pixel data of the dimming pixels that overlap with the multiple display pixels arranged in m rows and m columns, based on the initial display pixel data of the multiple display pixels arranged in m rows and m columns, specifically includes: Sample the multiple display pixels arranged in m rows and m columns row by row to obtain sampled data for each row. The sampled data for each row is a weighted sum of the maximum and average values ​​of the initial display pixel data for the multiple display pixels in that row; and The maximum value in the m rows of sampled data is used as the initial dimming pixel data for the dimming pixel.

19. A dimming device for a display panel, wherein, The display panel includes a dimming screen and a display screen. The dimming screen is disposed on the backlight side of the display screen and configured to modulate the backlight of the display screen. The dimming screen includes a plurality of dimming pixels, and the display screen includes a plurality of display pixels. The dimming device includes: The image data acquisition module is used to acquire the image data of the image to be displayed. An initial dimming pixel data determination module is used to determine the initial dimming pixel data of each dimming pixel based on the image data. The module for determining the dimming pixel to be filtered is used to determine the dimming pixel to be filtered in the dimming screen based on the initial dimming pixel data of each dimming pixel. The first filtering region determination module is used to determine a first filtering region based on the determined dimming pixel to be filtered, wherein the first filtering region is centered on the determined dimming pixel to be filtered, and the first filtering region includes a first preset number of dimming pixels in both a first direction and a second direction, and the first direction and the second direction intersect. The filter parameter determination module is used to determine the filter parameters of each dimming pixel in the first filter region based on the relationship between each dimming pixel in the first filter region and the initial dimming pixel data of each dimming pixel in the first filter region; and The dimming pixel data update module is used to update the dimming pixel data of the dimming pixel to be filtered according to the filtering parameters of each dimming pixel in the first filtering area, so as to obtain updated dimming pixel data.

20. A display device, comprising: One or more processors; Storage device for storing one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors perform the method according to any one of claims 1 to 18.

21. A computer-readable storage medium having stored thereon executable instructions that, when executed by a processor, cause the processor to perform the method according to any one of claims 1 to 18.

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