Display device, display method and storage medium

Abstract

A display device (100), a display method and a storage medium are provided for improving the display effect of the display device (100) under a large viewing angle. The display device (100) comprises a display panel (112) and a dimming panel (114) which are stacked, and the dimming panel (114) is configured to perform backlight modulation on the display panel (112). The display panel (112) comprises a first display area and a second display area which are adjacent to each other, and the gray-scale value of the first display area is greater than that of the second display area. The dimming panel (114) comprises a first dimming area and a second dimming area which are adjacent to each other. The first dimming area is used for dimming an image of the first display area, and the second dimming area is used for dimming an image of the second display area. Wherein the gray-scale value of the first dimming area is smaller than or equal to the gray-scale value of the first display area. The gray-scale value of the second dimming area is smaller than the gray-scale value of the first dimming area and larger than the gray-scale value of the second display area.

Description

Display device, display method and storage medium

[0001] This application claims priority to the Chinese patent application No. PCT / CN2024 / 120844, filed with the State Intellectual Property Office on September 24, 2024 and entitled "A display device and a method for improving display effect", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of display, in particular to a display device, a display method and a storage medium. BACKGROUND

[0003] In the technical field of display, the superimposed screen display device is realized by two layers of panels, i.e. the upper display panel and the lower light modulation panel. However, due to the certain interval between the display panel and the light modulation panel, ghosting and dark font edges will occur when viewing the screen at a large viewing angle. SUMMARY

[0004] The present disclosure provides a display device, a display method and a storage medium for improving the display effect of the display device at a large viewing angle and solving the problem of ghosting and dark font edges when viewing the screen at a large viewing angle.

[0005] In a first aspect, the present disclosure provides a display device. The display device includes a display panel and a light modulation panel arranged in layers. The light modulation panel is configured to modulate the backlight of the display panel. The display panel includes a first display area and a second display area adjacent to each other. The gray scale value of the first display area is greater than that of the second display area. The light modulation panel includes a first light modulation area and a second light modulation area adjacent to each other. The first light modulation area is used to modulate the picture of the first display area, and the second light modulation area is used to modulate the picture of the second display area. The gray scale value of the first light modulation area is less than or equal to that of the first display area. The gray scale value of the second light modulation area is less than that of the first light modulation area and greater than that of the second display area.

[0006] In some possible implementations, the first light modulation area and the second light modulation area each include a plurality of sub-light modulation areas arranged repeatedly along a first direction and a second direction, and the first direction is perpendicular to the second direction. From the center of the first light modulation area, the gray scale values of the sub-light modulation areas arranged along the first direction in the first light modulation area and the second light modulation area decrease, and the gray scale value difference between any two sub-light modulation areas with decreasing gray scale values is greater than a first threshold value. And / or, from the center of the first light modulation area, the gray scale values of the sub-light modulation areas arranged along the second direction in the first light modulation area and the second light modulation area decrease, and the gray scale value difference between any two sub-light modulation areas with decreasing gray scale values is greater than a first threshold value.

[0007] In some possible implementations, the first light-adjusting area and the second light-adjusting area each include a plurality of sub light-adjusting areas arranged repeatedly along a first direction and a second direction, the first direction being perpendicular to the second direction. From the center of the first light-adjusting area, the gray scale values of the sub light-adjusting areas arranged along the first direction in the first light-adjusting area and the second light-adjusting area decrease, and the gray scale value difference between any two sub light-adjusting areas with decreasing gray scale values is greater than a first threshold value. From the center of the first light-adjusting area, the gray scale value difference between any two sub light-adjusting areas arranged along the second direction in the first light-adjusting area and the second light-adjusting area is less than a second threshold value.

[0008] In some possible implementations, the first light-adjusting area and the second light-adjusting area each include a plurality of sub light-adjusting areas arranged repeatedly along a first direction and a second direction, the first direction being perpendicular to the second direction. From the center of the first light-adjusting area, the gray scale values of the sub light-adjusting areas arranged along the first direction, the opposite direction of the first direction, the second direction and the opposite direction of the second direction decrease, and the gray scale value difference between any two sub light-adjusting areas with decreasing gray scale values is greater than a first threshold value.

[0009] In some possible implementations, the first light-adjusting area and the second light-adjusting area each include a plurality of sub light-adjusting areas arranged repeatedly along a first direction and a second direction, the first direction being perpendicular to the second direction. The gray scale values of the sub light-adjusting areas in the first light-adjusting area and the second light-adjusting area are axially symmetrical about a preset straight line. The preset straight line passes through the center of the first light-adjusting area and is parallel to the first direction or parallel to the second direction.

[0010] In some possible implementations, the gray scale values of the sub light-adjusting areas in the first light-adjusting area and the second light-adjusting area are centrally symmetrical about the center of the first light-adjusting area.

[0011] In some possible implementations, the first light-adjusting area and the second light-adjusting area each include a plurality of sub light-adjusting areas arranged repeatedly along a first direction and a second direction, the first direction being perpendicular to the second direction. The first light-adjusting area or the second light-adjusting area includes a first sub light-adjusting area, and a direction from the center of the first light-adjusting area to the center of the first sub light-adjusting area is parallel to the first direction. From the center of the first sub light-adjusting area, the gray scale values of the sub light-adjusting areas arranged along the second direction or the opposite direction of the second direction in the first light-adjusting area or the second light-adjusting area decrease, and the gray scale value difference between any two sub light-adjusting areas with decreasing gray scale values is greater than a first threshold value.

[0012] In some possible implementations, the first light-adjusting area or the second light-adjusting area includes a second sub light-adjusting area, and a direction from the center of the first light-adjusting area to the center of the second sub light-adjusting area is parallel to the second direction. From the center of the second sub light-adjusting area, the gray scale values of the sub light-adjusting areas arranged along the first direction or the opposite direction of the first direction in the first light-adjusting area or the second light-adjusting area decrease, and the gray scale value difference between any two sub light-adjusting areas with decreasing gray scale values is greater than a first threshold value.

[0013] In some possible implementations, the first light-adjusting region and the second light-adjusting region each include a plurality of sub light-adjusting regions, and the gray scale values of the sub light-adjusting regions arranged in the first direction decrease.

[0014] In some possible implementations, the gray scale value of the first display region is greater than a first gray scale threshold, and the gray scale value of the second display region is less than a second gray scale threshold.

[0015] In some possible implementations, the first gray scale threshold is greater than 85 and less than 255, and the second gray scale threshold is less than 21.

[0016] In some possible implementations, the first display region and the second display region each include a plurality of sub display regions, and the first light-adjusting region and the second light-adjusting region each include a plurality of sub light-adjusting regions. One of the sub display regions corresponds to one of the sub light-adjusting regions. Each of the sub display regions includes at least one display pixel unit, and the display pixel unit includes three display sub-pixels. Each of the sub light-adjusting regions includes at least one light-adjusting pixel unit, and the light-adjusting pixel unit includes at least one light-adjusting sub-pixel. One light-adjusting pixel unit corresponds to at least one display pixel unit.

[0017] In some possible implementations, the three display sub-pixels include a red display sub-pixel, a green display sub-pixel, and a blue display sub-pixel.

[0018] In some possible implementations, the light-adjusting panel has a first luminance curve, and the first luminance curve is used to represent a mapping relationship between different gray scale values and luminance in the light-adjusting panel. The display panel has a second luminance curve, and the second luminance curve is used to represent a mapping relationship between different gray scale values and luminance in the display panel. The first luminance curve includes a plurality of continuous sub-luminance curves, and the gamma values corresponding to the sub-luminance curves are different. The second luminance curve includes a plurality of continuous sub-luminance curves, and the gamma values corresponding to the sub-luminance curves are different.

[0019] In some possible implementations, the plurality of continuous sub-luminance curves in the first luminance curve correspond to a plurality of continuous gray scale intervals, and each sub-luminance curve corresponds to a gray scale interval. A first sub-luminance curve corresponds to a first gray scale interval, and a second sub-luminance curve corresponds to a second gray scale interval. The gamma value corresponding to the first sub-luminance curve is greater than the gamma value corresponding to the second sub-luminance curve. The first sub-luminance curve and the second sub-luminance curve are any two continuous sub-luminance curves in the plurality of sub-luminance curves of the first luminance curve. The first gray scale interval and the second gray scale interval are continuous, and the maximum gray scale value of the first gray scale interval is less than the minimum gray scale value of the second gray scale interval.

[0020] In some possible embodiments, the first luminance curve comprises a first sub-luminance curve and a second sub-luminance curve. The second luminance curve comprises a third sub-luminance curve and a fourth sub-luminance curve. The first sub-luminance curve corresponds to a first gamma value, the second sub-luminance curve corresponds to a second gamma value, the third sub-luminance curve corresponds to a third gamma value, and the fourth sub-luminance curve corresponds to a fourth gamma value. The sum of the first gamma value and the third gamma value is equal to the sum of the second gamma value and the fourth gamma value. The first sub-luminance curve and the third sub-luminance curve both correspond to a first gray scale interval, the second sub-luminance curve and the fourth sub-luminance curve both correspond to a second gray scale interval, the first gray scale interval and the second gray scale interval are continuous, and a maximum gray scale value of the first gray scale interval is less than a minimum gray scale value of the second gray scale interval.

[0021] In some possible embodiments, the maximum gray scale value of the first gray scale interval is less than or equal to 127.

[0022] In some possible embodiments, the minimum gray scale value of the second gray scale interval is greater than 85 and less than 255.

[0023] In some possible embodiments, the second sub-luminance curve corresponds to a gamma value of zero.

[0024] In a second aspect, the display device provided by the embodiments of the present disclosure includes a display panel and a dimming panel arranged in layers. The dimming panel is configured to modulate the backlight of the display panel. The dimming panel has a first luminance curve, which is used to represent the mapping relationship between different gray scale values and luminance in the dimming panel. The display panel has a second luminance curve, which is used to represent the mapping relationship between different gray scale values and luminance in the display panel. The first luminance curve includes continuous multiple sub-luminance curves, and the gamma values corresponding to the sub-luminance curves are different. The second luminance curve includes continuous multiple sub-luminance curves, and the gamma values corresponding to the sub-luminance curves are different.

[0025] In some possible embodiments, the continuous multiple sub-luminance curves in the first luminance curve correspond to continuous multiple gray scale intervals, and each sub-luminance curve corresponds to a gray scale interval. The first sub-luminance curve corresponds to a first gray scale interval, the second sub-luminance curve corresponds to a second gray scale interval, and the gamma value corresponding to the first sub-luminance curve is greater than the gamma value corresponding to the second sub-luminance curve. The first sub-luminance curve and the second sub-luminance curve are any two continuous sub-luminance curves in the multiple sub-luminance curves of the first luminance curve of the second luminance curve. The first gray scale interval and the second gray scale interval are continuous, and the maximum gray scale value of the first gray scale interval is less than the minimum gray scale value of the second gray scale interval.

[0026] In some possible implementation manners, the first luminance curve includes a first sub-luminance curve and a second sub-luminance curve. The second luminance curve includes a third sub-luminance curve and a fourth sub-luminance curve. The first sub-luminance curve corresponds to a first gamma value, the second sub-luminance curve corresponds to a second gamma value, the third sub-luminance curve corresponds to a third gamma value, and the fourth sub-luminance curve corresponds to a fourth gamma value. A sum of the first gamma value and the third gamma value is equal to a sum of the second gamma value and the fourth gamma value. The first sub-luminance curve and the third sub-luminance curve both correspond to a first gray scale interval, the second sub-luminance curve and the fourth sub-luminance curve both correspond to a second gray scale interval, the first gray scale interval and the second gray scale interval are continuous, and a maximum gray scale value of the first gray scale interval is less than a minimum gray scale value of the second gray scale interval.

[0027] In a third aspect, the display device provided by the embodiments of the present disclosure includes a display panel and a dimming panel. The dimming panel is configured to modulate the backlight of the display panel. The display panel includes a plurality of display pixel units. The first display pixel unit is any display pixel unit in the plurality of display pixel units. The first display pixel unit includes a first display sub-pixel, a second display sub-pixel, and a third display sub-pixel. The dimming panel includes a plurality of dimming pixel units. The first dimming pixel unit is any dimming pixel unit in the plurality of dimming pixel units. The first dimming pixel unit is configured to modulate the backlight of the first display pixel unit. The display gray scale value of the first display sub-pixel is equal to the first gray scale value, the display gray scale value of the second display sub-pixel is less than the second gray scale value, and the display gray scale value of the third display sub-pixel is less than the third gray scale value. The gray scale value of the first dimming pixel unit is equal to the first gray scale value. The first gray scale value, the second gray scale value, and the third gray scale value are the first gray scale value corresponding to the first display sub-pixel, the second gray scale value corresponding to the second display sub-pixel, and the third gray scale value corresponding to the third display sub-pixel in the input display gray scale values of the display device. The first gray scale value is greater than the second gray scale value, and the second gray scale value is greater than the third gray scale value.

[0028] In some possible implementation manners, the first gray scale value, the second gray scale value, and the display gray scale value of the second display sub-pixel have the following relationship:

[0029] The first gray scale value, the third gray scale value, and the display gray scale value of the third display sub-pixel have the following relationship:

[0030] The first gray scale value, the third gray scale value, and the display gray scale value of the third display sub-pixel have the following relationship:

[0031] In some possible implementation manners, the dimming panel has a first luminance curve used to represent a mapping relationship between different gray scale values and luminance in the dimming panel. The display panel has a second luminance curve used to represent a mapping relationship between different gray scale values and luminance in the display panel. The first luminance curve includes continuous multiple sub-luminance curves, and each sub-luminance curve corresponds to a different gamma value. The second luminance curve includes continuous multiple sub-luminance curves, and each sub-luminance curve corresponds to a different gamma value.

[0032] In some possible implementation manners, the first luminance curve includes a first sub-luminance curve and a second sub-luminance curve. The second luminance curve includes a third sub-luminance curve and a fourth sub-luminance curve. The first sub-luminance curve corresponds to a first gamma value, the second sub-luminance curve corresponds to a second gamma value, the third sub-luminance curve corresponds to a third gamma value, and the fourth sub-luminance curve corresponds to a fourth gamma value. A sum of the first gamma value and the third gamma value is equal to a sum of the second gamma value and the fourth gamma value. The first sub-luminance curve and the third sub-luminance curve both correspond to a first gray scale interval, the second sub-luminance curve and the fourth sub-luminance curve both correspond to a second gray scale interval, the first gray scale interval and the second gray scale interval are continuous, and a maximum gray scale value of the first gray scale interval is less than a minimum gray scale value of the second gray scale interval.

[0033] In some possible implementation manners, when the first gray scale value belongs to the first gray scale interval, the first gray scale value, the second gray scale value, and the display gray scale value of the second display sub-pixel have the following relationship:

[0034] The first gray scale value, the third gray scale value, and the display gray scale value of the third display sub-pixel have the following relationship:

[0035] When the first gray scale value belongs to the second gray scale interval, the maximum gray scale value of the first gray scale interval, the second gray scale value, and the display gray scale value of the second display sub-pixel have the following relationship:

[0036] The maximum gray scale value of the first gray scale interval, the third gray scale value, and the display gray scale value of the third display sub-pixel have the following relationship:

[0037] Wherein, α represents the gamma value of the first sub-luminance curve, and β represents the gamma value of the third sub-luminance curve.

[0038] In a fourth aspect, the display method is provided in the embodiments of the present disclosure, and is applied to a display device. The display device includes a display panel and a light modulation panel. The display method includes: obtaining a to-be-displayed gray scale value. According to the to-be-displayed gray scale value, a first luminance curve and a second luminance curve, a display gray scale value of the display panel and the light modulation panel is determined. The first luminance curve is used to represent a mapping relationship between different gray scale values and luminance in the light modulation panel. The second luminance curve is used to represent a mapping relationship between different gray scale values and luminance in the display panel. The first luminance curve includes continuous multiple sub-luminance curves, and the gamma values corresponding to each sub-luminance curve are different. The second luminance curve includes continuous multiple sub-luminance curves, and the gamma values corresponding to each sub-luminance curve are different.

[0039] In a fifth aspect, the display method is provided in the embodiments of the present disclosure, and is applied to a display device. The display device includes a display panel and a light modulation panel. The display method includes: obtaining a gray scale value corresponding to a first display area and a gray scale value corresponding to a second display area in a to-be-displayed gray scale value. The gray scale value corresponding to the first display area is greater than the gray scale value of the second display area. The first display area and the second display area are adjacent in the display panel. According to the gray scale value corresponding to the first display area and the gray scale value of the second display area, a gray scale value of a first light modulation area and a second light modulation area is obtained. The first light modulation area and the second light modulation area are adjacent in the light modulation panel. The first light modulation area is used to modulate the picture of the first display area, and the second light modulation area is used to modulate the picture of the second display area. The gray scale value of the first light modulation area is less than or equal to the gray scale value of the first display area. The gray scale value of the second light modulation area is less than the gray scale value of the first light modulation area and greater than the gray scale value of the second display area.

[0040] In a sixth aspect, the display method is applied to a display device, and the display device includes a display panel and a light modulation panel. The light modulation panel is configured to modulate the backlight of the display panel. The display panel includes a plurality of display pixel units, and a first display pixel unit is any one of the plurality of display pixel units. The first display pixel unit includes a first display sub-pixel, a second display sub-pixel, and a third display sub-pixel. The light modulation panel includes a plurality of light modulation pixel units, and a first light modulation pixel unit is any one of the plurality of light modulation pixel units. The first light modulation pixel unit is configured to modulate the backlight of the first display pixel unit. The display method includes: obtaining a first gray scale value corresponding to the first display sub-pixel, a second gray scale value corresponding to the second display sub-pixel, and a third gray scale value corresponding to the third display sub-pixel in a to-be-displayed gray scale value. The first gray scale value is greater than the second gray scale value, and the second gray scale value is greater than the third gray scale value. According to the first gray scale value, the second gray scale value, and the third gray scale value, a display gray scale value of the first display sub-pixel, a display gray scale value of the second display sub-pixel, a display gray scale value of the third display sub-pixel, and a display gray scale value of the first light modulation pixel unit are obtained. The display gray scale value of the first display sub-pixel is equal to the first gray scale value, the display gray scale value of the second display sub-pixel is less than the second gray scale value, the display gray scale value of the third display sub-pixel is less than the third gray scale value, and the gray scale value of the first light modulation pixel unit is equal to the first gray scale value.

[0041] In some possible implementation, the dimming panel has a first luminance curve for characterizing a mapping relationship between different gray scale values and luminance in the dimming panel. The display panel has a second luminance curve for characterizing a mapping relationship between different gray scale values and luminance in the display panel. The first luminance curve includes a first sub-luminance curve and a second sub-luminance curve. The second luminance curve includes a third sub-luminance curve and a fourth sub-luminance curve. The first sub-luminance curve corresponds to a first gamma value, the second sub-luminance curve corresponds to a second gamma value, the third sub-luminance curve corresponds to a third gamma value, and the fourth sub-luminance curve corresponds to a fourth gamma value. A sum of the first gamma value and the third gamma value is equal to a sum of the second gamma value and the fourth gamma value. The first sub-luminance curve and the third sub-luminance curve both correspond to a first gray scale interval, the second sub-luminance curve and the fourth sub-luminance curve both correspond to a second gray scale interval, the first gray scale interval and the second gray scale interval are continuous, and a maximum gray scale value of the first gray scale interval is less than a minimum gray scale value of the second gray scale interval. Obtaining display gray scale values of the first display sub-pixel, the second display sub-pixel, the third display sub-pixel, and the first dimming pixel unit according to the first gray scale value, the second gray scale value, and the third gray scale value includes: when the first gray scale value is less than a preset threshold, obtaining the display gray scale values of the first display sub-pixel, the second display sub-pixel, the third display sub-pixel, and the first dimming pixel unit according to the first gray scale value, the second gray scale value, the third gray scale value, a gamma value of the first sub-luminance curve, and a gamma value of the third sub-luminance curve. When the first gray scale value is greater than the preset threshold, obtaining the display gray scale values of the first display sub-pixel, the second display sub-pixel, the third display sub-pixel, and the first dimming pixel unit according to the preset threshold, the first gray scale value, the second gray scale value, the third gray scale value, the gamma value of the first sub-luminance curve, and the gamma value of the third sub-luminance curve. The preset threshold is the maximum gray scale value of the first gray scale interval or the minimum gray scale value of the second gray scale interval.

[0042] In a seventh aspect, the present disclosure provides a computer program product, which includes computer program code for causing a computer to perform any of the above methods when the computer program code runs on the computer. These and other aspects of the present disclosure will become more apparent in the following description of the embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly introduced as follows. Obviously, the drawings in the following description are only some drawings of the embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limited to the actual size, actual process, actual time sequence, etc. of the products involved in the embodiments of the present disclosure.

[0044] Fig. 1 is a structural schematic diagram of a display device according to an embodiment of the present disclosure;

[0045] Fig. 2 is a structural schematic diagram of a display screen according to an embodiment of the present disclosure;

[0046] Fig. 3 is a structural schematic diagram of a display screen according to an embodiment of the present disclosure;

[0047] Fig. 4 is a structural schematic diagram of a display screen according to an embodiment of the present disclosure;

[0048] Figs. 5A-5D are schematic diagrams of the correspondence between a dimming pixel unit and a display pixel unit in a display screen according to an embodiment of the present disclosure;

[0049] Fig. 6 is a schematic diagram of the relationship between a first luminance curve, a second luminance curve and a third luminance curve according to an embodiment of the present disclosure;

[0050] Fig. 7 is a schematic diagram of the relationship between a first luminance curve, a second luminance curve and a third luminance curve according to an embodiment of the present disclosure;

[0051] Fig. 8 is a schematic diagram of the display of a display screen according to an embodiment of the present disclosure;

[0052] Fig. 9 is a flow schematic diagram of a display method according to an embodiment of the present disclosure;

[0053] Fig. 10 is a structural schematic diagram of a display screen according to an embodiment of the present disclosure;

[0054] Fig. 11 is a schematic diagram of the display effect of a display screen at different viewing angles according to an embodiment of the present disclosure;

[0055] Fig. 12 is a flow schematic diagram of a display method according to an embodiment of the present disclosure;

[0056] Fig. 13 is a schematic diagram of the relationship between a first luminance curve, a second luminance curve and a third luminance curve according to an embodiment of the present disclosure;

[0057] FIG. 14 is a schematic diagram four of the relationship among the first luminance curve, the second luminance curve and the third luminance curve according to an embodiment of the present disclosure;

[0058] FIG. 15 is a schematic diagram five of the relationship among the first luminance curve, the second luminance curve and the third luminance curve according to an embodiment of the present disclosure;

[0059] FIG. 16 is a partial enlarged schematic diagram of the luminance curve of L20 and below in FIG. 15 according to an embodiment of the present disclosure;

[0060] FIG. 17 is a flowchart of a display method according to an embodiment of the present disclosure;

[0061] FIG. 18 is a schematic diagram of the display area partition of a display panel or the dimming area partition of a dimming panel according to an embodiment of the present disclosure;

[0062] FIG. 19 is a schematic diagram of the position of a sub-dimming area according to an embodiment of the present disclosure;

[0063] FIG. 20 is a schematic diagram of the original gray scale value in a 3x3 sub-dimming area of a dimming panel according to an embodiment of the present disclosure;

[0064] FIG. 21 is a schematic diagram of the gray scale value distribution of a sub-dimming area of a dimming panel according to an embodiment of the present disclosure;

[0065] FIG. 22 is a schematic diagram of the gray scale value distribution of a sub-dimming area of a dimming panel according to an embodiment of the present disclosure;

[0066] FIG. 23 is a schematic diagram of the gray scale value distribution of a sub-dimming area of a dimming panel according to an embodiment of the present disclosure;

[0067] FIG. 24 is a schematic diagram of the gray scale value distribution of a sub-dimming area of a dimming panel according to an embodiment of the present disclosure;

[0068] FIG. 25 is a schematic diagram of the original gray scale value in a 3x3 sub-dimming area of a dimming panel according to an embodiment of the present disclosure;

[0069] FIG. 26 is a schematic diagram of a transition operation process according to an embodiment of the present disclosure;

[0070] FIG. 27 is a schematic diagram of the position of a sub-dimming area and an operation matrix according to an embodiment of the present disclosure;

[0071] FIG. 28 is a schematic diagram of an operation process according to an embodiment of the present disclosure;

[0072] FIG. 29 is a schematic diagram of the gray scale value distribution of a sub-dimming area of a dimming panel according to an embodiment of the present disclosure;

[0073] FIG. 30 is a schematic view of a gray scale value distribution of a sub light adjusting area in a light adjusting panel according to an embodiment of the present disclosure;

[0074] FIG. 31 is a schematic view of a gray scale value distribution of a sub light adjusting area in a light adjusting panel according to an embodiment of the present disclosure;

[0075] FIG. 32 is a schematic view of a gray scale value distribution of a sub light adjusting area in a light adjusting panel according to an embodiment of the present disclosure;

[0076] FIG. 33 is a schematic view of a gray scale value distribution of a sub light adjusting area in a light adjusting panel according to an embodiment of the present disclosure;

[0077] FIG. 34 is a schematic view of a gray scale value distribution of a sub light adjusting area in a light adjusting panel according to an embodiment of the present disclosure;

[0078] FIG. 35 is a schematic view of a flow of a display method according to an embodiment of the present disclosure;

[0079] FIG. 36 is a schematic view of a display mode of a display panel and a light adjusting panel in a display screen according to an embodiment of the present disclosure;

[0080] FIG. 37 is a schematic view of a display mode of a display panel and a light adjusting panel in a display screen according to an embodiment of the present disclosure;

[0081] FIG. 38 is a schematic view of display effects of a display screen device under different viewing angles according to an embodiment of the present disclosure;

[0082] FIG. 39 is a schematic view of a gray scale value distribution of a sub light adjusting area in a light adjusting panel according to an embodiment of the present disclosure;

[0083] FIG. 40 is a schematic view of a gray scale value distribution of a sub light adjusting area in a light adjusting panel according to an embodiment of the present disclosure;

[0084] FIG. 41 is a schematic view of a display mode of a display panel and a light adjusting panel in a display screen according to an embodiment of the present disclosure;

[0085] FIG. 42 is a schematic view of a structure of a display device according to an embodiment of the present disclosure;

[0086] FIG. 43 is a schematic view of a structure of a display device according to an embodiment of the present disclosure;

[0087] FIG. 44 is a schematic view of a back view of a display device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0088] In order to make the purposes, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present disclosure.

[0089] The term "and / or" in the embodiments of the present disclosure describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the front and rear associated objects.

[0090] The application scenarios described in the embodiments of the present disclosure are used to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those of ordinary skill in the art can know that, as new application scenarios appear, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems. In the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is two or more.

[0091] Before introducing the display device, display method and storage medium provided by the embodiments of the present disclosure, in order to facilitate understanding, first, the technical background of the embodiments of the present disclosure is introduced in detail.

[0092] FIG. 1 shows a structural diagram of a display device. The display device 100 includes a display screen 110 and a control circuit 120, and the display screen 110 and the control circuit 120 are coupled.

[0093] The display screen 110 includes a display panel 112 and a dimming panel 114, and the display panel 112 can also be referred to as a first display panel or a main screen (Main Cell), and the dimming panel 114 can also be referred to as a second display panel or a sub-screen (Sub Cell). The dimming panel 114 is disposed on the backlight side of the display panel 112 and is configured to modulate the backlight of the display panel 112.

[0094] The control circuit 120 is configured to receive gray scale values (to-be-displayed gray scale values) of a to-be-displayed image, and the gray scale values are used to represent the luminance information of the to-be-displayed image. Based on the received to-be-displayed gray scale values, the control circuit 120 respectively sends corresponding driving signals to the display panel 112 and the dimming panel 114. The driving signals are used to control the display panel 112 and the dimming panel 114 to respectively display luminance or luminance transmittance (normalized to luminance) matched with the received gray scale values, so as to work cooperatively to enable the display screen 110 to accurately display the visual effect corresponding to the to-be-displayed image.

[0095] FIG. 2 shows a structure of a display screen and a schematic diagram of a front view of the display screen. As shown in FIG. 2, the display screen 110 further includes a backlight module 116. The display panel 112, the light-adjusting panel 114 and the backlight module 116 are sequentially stacked. The light-adjusting panel 114 is arranged between the backlight module 116 and the display panel 112. The backlight module 116 is used to provide backlight for the display screen 110, so as to ensure that the display screen 110 can normally display images.

[0096] The backlight module 116 can include two types of edge-lit backlight module (E-LED) and direct-lit backlight module (D-LED).

[0097] As shown in FIG. 3, a structure schematic diagram of an edge-lit backlight module, the backlight module 116 includes a light guide plate (LGP) 1162 and a backlight source 1164, such as a light bar (L / B). The backlight source 1164 is arranged at the side of the light guide plate 1162, instead of being directly distributed on the back of the display screen 110. The light guide plate 1162 is a transparent plate with dots on one side. The light emitted by the backlight source 1164 is irradiated into the light guide plate 1162 from one side. When the light conducts inside the light guide plate 1162, it irradiates on the dots of the light guide plate 1162, generates scattering, and then makes the light output from the side of the light guide plate 1162 without dots. In this way, the linear light source emitted by the backlight source 1164 is converted into a surface light source, which provides uniform backlight for the display screen 110.

[0098] The direct-lit backlight module uniformly distributes the LED backlight source on the back of the light-adjusting panel 114. The light emitted by the LED backlight source is diffused by a diffusion plate in the backlight module 116, so that the light is more uniform. Then, the light is further processed by a series of optical films (such as reflection film, diffusion film, brightness enhancement film, etc.), and finally provides uniform and bright backlight for the display panel 112.

[0099] As shown in the structure schematic diagram of the display screen 110 in FIG. 2 or FIG. 3, the display screen 110 adopts double-layer panel stacking. The picture displayed in the display panel 112 is light-adjusted by the light-adjusting panel 114, so as to greatly improve the contrast of the display.

[0100] As shown in FIG. 4, a structure schematic diagram of a display screen. The display panel 112 includes an upper glass 1122, liquid crystal pixels 1124 and a lower glass 1126. The light-adjusting panel 114 includes an upper glass 1142, liquid crystal pixels 1144 and a lower glass 1146. A connecting layer 118 is arranged between the display panel 112 and the light-adjusting panel 114. The connecting layer 118 can be a buckle structure or the material of the connecting layer 118 is a light-transmitting material with cementation strength.

[0101] The connecting layer 118 can be a bonding adhesive and a film material, such as a double-sided bonding adhesive tape without a base material. The material of the connecting layer 118 includes, but is not limited to, an Optics Clarity Adhesive (OCA).

[0102] The vertical distance between the liquid crystal pixel 1124 in the display panel 112 and the liquid crystal pixel 1144 in the light modulation panel 114 is a first preset value, such as 1.821 mm.

[0103] In some examples, the connecting layer 118 as shown in FIG. 4 can not be provided between the display panel 112 and the light modulation panel 114, and the display panel 112 and the light modulation panel 114 can be directly bonded, such as by an adsorption effect between the two panels.

[0104] In some possible implementations, the display panel 112 includes a plurality of display pixel units, and each display pixel unit includes at least three display sub-pixels. The light modulation panel 114 includes a plurality of light modulation pixel units, and each light modulation pixel unit includes at least one light modulation sub-pixel. One light modulation pixel unit corresponds to at least one display pixel unit.

[0105] FIGS. 5A-5D respectively show a schematic diagram of the corresponding relationship between a light modulation pixel unit and a display pixel unit in a display screen. The corresponding relationship between a light modulation pixel unit and a display pixel unit is described by taking an example in which each display pixel unit includes three display sub-pixels.

[0106] As shown in FIG. 5A, one light modulation pixel unit E in the light modulation panel 114 corresponds to one display pixel unit F in the display panel 112, and the light modulation pixel unit E includes three light modulation sub-pixels EX, that is, the number of display sub-pixels FX in the display panel 112 and the number of light modulation sub-pixels EX in the light modulation panel 114 are 1:1.

[0107] The size specification of the display sub-pixel FX is the same as that of the light modulation sub-pixel EX, such as the width of each sub-pixel (including the display sub-pixel FX and the light modulation sub-pixel EX) can be a second preset value, such as 0.2745 mm. The three display sub-pixels FX included in the display pixel unit F can be a red display sub-pixel, a green display sub-pixel, and a blue display sub-pixel, respectively, for displaying a color picture.

[0108] The three light modulation sub-pixels EX included in the light modulation pixel unit E are used to adjust the brightness of the display sub-pixel FX in the display panel 112 through different gray scale values.

[0109] As shown in FIG. 5B, one light modulation pixel unit E in the light modulation panel 114 corresponds to one display pixel unit F in the display panel 112, and one light modulation pixel unit E includes two light modulation sub-pixels EX, that is, the number of display sub-pixels FX in the display panel 112 and the number of light modulation sub-pixels EX in the light modulation panel 114 are 3:2.

[0110] As shown in FIG. 5C, one light modulation pixel unit E in the light modulation panel 114 corresponds to one display pixel unit F in the display panel 112, and one light modulation pixel unit E includes one light modulation sub-pixel EX, that is, the number of display sub-pixels FX in the display panel 112 and the number of light modulation sub-pixels EX in the light modulation panel 114 are 3:1.

[0111] As shown in FIG. 5D, one light modulation pixel unit E in the light modulation panel 114 corresponds to four display pixel units F in the display panel 112, and one light modulation pixel unit E includes one light modulation sub-pixel EX.

[0112] It should be noted that the correspondence between the light modulation pixel unit E and the display pixel unit F includes but is not limited to the embodiments shown in FIGS. 5A-5D, and can be determined by those skilled in the art based on actual conditions, which is not limited herein.

[0113] When the display device 100 presents an image, due to the difference in sensitivity of the human eye to different brightness, the brightness of the image presented by the display device 100 is often inconsistent with the brightness of the original input image, and there is a certain deviation. Specifically, in a darker environment, the human eye is more sensitive to changes in brightness, while in a bright environment, it is relatively less sensitive. Therefore, there is not a linear relationship between the brightness perceived by the human eye and the actual brightness. For example, even if the brightness is doubled, the human eye may only perceive a slight change. When the brightness is increased to eight times or more, the human eye may consider the brightness to be doubled.

[0114] This deviation can cause the image output by the display device 100 to be distorted compared to the input image, resulting in a significant difference between the color displayed on the screen and the input image color, or the display device 100 displaying the image too bright or too dark. Taking the gray scale change as an example, when the display device 100 gradually changes from black to white, the input gray scale value also needs to change accordingly, but this change is not linear. Due to the physical characteristics of the display device 100, if the input gray scale value changes linearly, the output brightness value is nonlinear.

[0115] In order to ensure that the displayed luminance value is consistent with the expected luminance value, it is necessary to perform gamma correction on the gray scale value input by the display device 100, that is, to perform gamma correction on the display screen 110. This process can make the change relationship between the gray scale value input by the display device 100 and the output luminance satisfy a specific corresponding relationship curve, that is, a gamma curve or a luminance curve. When the display device 100 input gray scale value and output luminance value satisfy the gamma curve, the display device 100 can accurately display the preset luminance and color.

[0116] The gray scale refers to how many light and dark levels a color can have from dark to light. The more the luminance of a color changes, the more the gray scale. The gray scale level of the display device 100 mainly depends on the digital-to-analog conversion bit number of the system. For example, an 8-bit processing system has 2 to the power of 8 gray scale, that is, 256 gray scale, that is, there are 256 luminance changes from black to white. In addition, the gray scale level of the display device 100 can also be 64, 512, 1024, etc., which are not listed here. This embodiment takes the display screen with 256 gray scales as an example for introduction. The 256 gray scales are L0-L255 in order from small to large.

[0117] Since the display screen 110 includes the display panel 112 and the dimming panel 114 as shown in FIG. 1, FIG. 2, FIG. 3 or FIG. 4, in order for the display screen 110 to display the preset luminance and color, the display panel 112 and the dimming panel 114 need to work together, so the luminance curves of the display panel 112 and the dimming panel 114 need to be respectively gamma corrected.

[0118] FIG. 6 shows a schematic diagram of the relationship between a first luminance curve G1, a second luminance curve G2 and a third luminance curve G3.

[0119] The dimming panel 114 has a first luminance curve G1 (or a first gamma curve), which is used to represent the mapping relationship between different gray scale values and luminance in the dimming panel 114. The display panel 112 has a second luminance curve G2 (or a second gamma curve), which is used to represent the mapping relationship between different gray scale values and luminance in the display panel 112. The display screen 110 has a third luminance curve G3 (or a third gamma curve), which is used to represent the mapping relationship between the to-be-displayed gray scale value and the luminance. The gamma value of the third luminance curve G3 is the sum of the gamma value corresponding to the first luminance curve G1 and the gamma value corresponding to the second luminance curve G2. The to-be-displayed gray scale value is the gray scale value in the image input to the display device 100.

[0120] As shown in FIG. 6, the abscissa of the luminance curve represents the gray scale value, such as L0-L255. The ordinate represents the luminance transmittance, which is obtained by normalizing the luminance.

[0121] In the above, each gray scale value has a corresponding brightness, and the brightness corresponding to the gray scale value gradually increases in order of gradually increasing gray scale value. Specifically, the higher the gray scale, the greater the brightness, and the lower the gray scale, the greater the brightness. In the schematic diagram of the brightness curve as shown in FIG. 6, the abscissa represents the gray scale value to be displayed in the input image, and the ordinate represents the brightness value corresponding to different gray scale values to be displayed. L0 represents black, the darkest, and L255 represents white, the brightest.

[0122] In order to make the display effect of the display device 100 consistent with the visual perception of the human eye, it is necessary to set the relationship between the gray scale value to be displayed and the corresponding brightness value as the brightness value being proportional to the γ power of the gray scale, and this relationship between the gray scale and the brightness value is referred to as the gamma curve or the brightness curve of the display device 100. For example, the value of γ is set to 2.2±0.2, so that the displayed image is close to the image actually seen by the human eye.

[0123] In some possible embodiments, in order to achieve a gamma value of γ (for example, γ = 2.2) for the display device 100, the gamma values of the display panel 112 and the dimming panel 114 need to be adjusted respectively.

[0124] In some examples, the gamma values of the display panel 112 and the dimming panel 114 can be respectively a fixed value. As shown in FIG. 6, the gamma value of the first brightness curve G1 corresponding to the dimming panel 114 can be 1.0, the gamma value of the second brightness curve G2 corresponding to the display panel 112 can be 1.2, and the gamma value of the third brightness curve G3 corresponding to the display screen 110 is 2.2, that is, the final display effect of the display screen 110 is that the brightness value is proportional to the 2.2 power of the gray scale value to be displayed.

[0125] In another example, FIG. 7 shows a schematic diagram of the relationship between another first brightness curve G1, another second brightness curve G2, and another third brightness curve G3.

[0126] As shown in FIG. 7, the gamma value of the first brightness curve G1 corresponding to the dimming panel 114 can be 1.2, the gamma value of the second brightness curve G2 corresponding to the display panel 112 can be 2.0, and the gamma value of the third brightness curve G3 corresponding to the display screen 110 is 3.2, that is, the final display effect of the display screen 110 is that the brightness value is proportional to the 3.2 power of the gray scale value to be displayed.

[0127] It should be noted that the gamma value of the first brightness curve G1 corresponding to the dimming panel 114 and the gamma value of the second brightness curve G2 corresponding to the display panel 112 in the present embodiment can be adjusted according to different design requirements, which are not limited herein.

[0128] To realize the superposition of display effects of the display panel 112 and the dimming panel 114, the display screen 110 can display normally according to the normal gamma value, and the following conditions need to be met:

[0129] In some possible embodiments, g in , g out_sub , and g out_main respectively represent the inputted gray scale value of the control circuit 120, the outputted gray scale value of the dimming panel 114, and the gray scale value of the display sub-pixel outputted by the display panel 112 (for example, the gray scale value of the red display sub-pixel, the green display sub-pixel, or the blue display sub-pixel). Tr_sub, Tr_main, and Tr_total are the normalized luminance transmittances of the dimming panel 114, the display panel 112, and the display screen 110 respectively, and the numerical ranges of the three are 0-1. Then, Tr_sub, Tr_main, and Tr_total meet the following formulas (1)-(3):

[0130] wherein, α represents the gamma value of the first luminance curve G1 corresponding to the dimming panel 114, β represents the gamma value of the second luminance curve G2 corresponding to the display panel 112, and the gamma value γ of the third luminance curve G3 corresponding to the display screen 110 is γ = α + β. As shown in FIG. 6, α = 1, β = 1.2, and γ = α + β = 1 + 1.2 = 2.2. As shown in FIG. 7, α = 1.2, β = 2.0, and γ = α + β = 1.2 + 2.0 = 3.2.

[0131] For example, the gray scale value of the display sub-pixel includes the gray scale value of the red display sub-pixel, the green display sub-pixel, or the blue display sub-pixel, and then g out_main = g in_R , g in_G , and g in_B formula (4)

[0132] wherein, g in_R represents the red display sub-pixel to be displayed in the input control circuit 120, g in_G represents the green display sub-pixel to be displayed in the input control circuit 120, and g in_B represents the blue display sub-pixel to be displayed in the input control circuit 120.

[0133] Under the condition that the red display sub-pixel, the green display sub-pixel, or the blue display sub-pixel all meet g in = g out_sub = g out_main , the superposition of display effects of the display panel 112 and the dimming panel 114 can make the display screen 110 normally display according to the gamma value of the third luminance curve G3.

[0134] In some examples, the correspondence between the light adjustment pixel unit E and the display pixel unit F is as shown in FIG. 5A. The gray scale values corresponding to the red display sub-pixel, the green display sub-pixel, or the blue display sub-pixel in the display panel 112 can be different. The gray scale values of the light adjustment sub-pixels in the same light adjustment pixel unit E are the same, and are the maximum gray scale value among the red display sub-pixel, the green display sub-pixel, or the blue display sub-pixel in the corresponding display pixel unit, i.e., as shown in equation (5): out_sub = g out_main = g in_R = g in_G = g in_B = g in Equation (5)

[0135] wherein g in may be any one of g in_R , g in_G , or g in_B .

[0136] In an example, a 24-bit picture is taken as an example, which is composed of three 8-bit color channels, i.e., red (R), green (G), and blue (B) channels, each of which can represent 256 levels of gray scale.

[0137] FIG. 8 shows a schematic diagram of display of pure color and mixed color in a display screen. As shown in A of FIG. 8, the display screen 110 is used to display pure color: R192, with g out_main = g in_R , g out_sub = g in_R , satisfying g out_sub = g out_main = g in_R , the display screen 110 normally displays according to the gamma value of the third luminance curve G3. At the same time, it can be measured that the color coordinates of the pure color picture R192 are x = 0.6724, y = 0.3137, and the luminance is Lv = 19.98 nit.

[0138] As shown in B of FIG. 8, the display screen 110 is used to display pure color: G55, with g out_main = g in_G , g out_sub = g in_G , satisfying g out_sub = g out_main = g in_G , the display screen 110 normally displays according to the gamma value of the third luminance curve G3. At the same time, it can be measured that the color coordinates of the pure color picture G55 are x = 0.2769, y = 0.6395, and the luminance is Lv = 4.75 nit.

[0139] As shown in C of FIG. 8, the display screen 110 is used to display a pure color: B13, with g out_main = g in_B , g out_sub = g in_B , g out_sub = g out_main = g in_B , the display screen 110 displays normally according to the gamma value of the third luminance curve G3. At the same time, it can be measured that the color coordinates of the pure color picture B13 are x = 0.1699, y = 0.1022, and the luminance is Lv = 0.07 nit.

[0140] According to A of FIG. 8, B of FIG. 8, and C of FIG. 8, it can be known that the pure color picture and the gray picture satisfy g out_sub = g out_main = g in , the display screen 110 displays normally.

[0141] As shown in D of FIG. 8, the display screen 110 is used to display a mixed color picture: R192+G55+B13, with g out_main = g in_R , g in_G , g in_B , g out_main = g in_R (not satisfying g out_sub = g out_main = g in , the display screen 110 does not display normally according to the gamma value of the third luminance curve G3.

[0142] Exemplarily, the theoretical color coordinates of the mixed color picture R192+G55+B13 are x = 0.6267, y = 0.3455, and the luminance is Lv = 24.79. However, the actual color coordinates of the mixed color picture R192+G55+B13 measured by the method shown in D of FIG. 8 are x = 0.5683, y = 0.3760, and the luminance is Lv = 32.29 nit. There is a large difference between the measured value and the theoretical value of the mixed color (luminance difference-0.75 nit, Δx =-0.0584, Δy = 0.0305), which leads to inconsistency between the theoretical and actual display pictures under the mixed color picture, and the abnormal problem of mixed color appears.

[0143] According to D of FIG. 8, the gray scale value g in (inputted by the control circuit 120 in the mixed color picture) of the sub-pixel to be displayed (which can include the gray scale values of the R sub-pixel, the G sub-pixel, and the B sub-pixel to be displayed) is different, and the following several exemplary display situations can occur:

[0144] In an example, when the gray scale value g ing in_max g out_sub g in_max g in The display sub-pixel displays the same brightness as the target brightness, and the target brightness refers to the transmittance Tr_total of the display screen 110. For example, when the gray scale value of the dimming panel 114 is L55, and the gray scale value of the corresponding display sub-pixel in the display panel 112 is G55, At this time, the display sub-pixel displays the same brightness as the target brightness, and the display screen 110 displays normally.

[0145] In another example, when the gray scale value g in of the display sub-pixel to be displayed is not the maximum value g in_max in the gray scale value to be displayed, out_sub g in_max > g in At this time, the display sub-pixel displays a brightness greater than the target brightness, resulting in abnormal color mixing. For example, when the gray scale value of the dimming panel 114 is 192, and the gray scale value of the corresponding display sub-pixel in the display panel 112 is G55, That is, the final display brightness of the display sub-pixel is greater than the target brightness, resulting in abnormal color mixing.

[0146] To solve the problem of abnormal color mixing, the first display method provided by the embodiment of the present disclosure is used for a display device, and the display sub-pixel with actual brightness greater than the target brightness can be reduced in brightness to the same as the target brightness by performing a color mixing algorithm. As shown in FIG. 9, the first display method specifically includes steps S110-S120:

[0147] S110, obtaining a first gray scale value corresponding to a first display sub-pixel, a second gray scale value corresponding to a second display sub-pixel, and a third gray scale value corresponding to a third display sub-pixel in the gray scale value to be displayed. The first gray scale value is greater than the second gray scale value, and the second gray scale value is greater than the third gray scale value.

[0148] In some possible implementation manners, FIG. 10 shows a structural schematic diagram of a display screen provided by an embodiment of the present disclosure. As shown in FIG. 10, the display screen 110 includes a display panel 112 and a dimming panel 114, and the dimming panel 114 is configured to backlight modulate the display panel 112. The display panel 112 includes a plurality of display pixel units F, and a first display pixel unit FA is any one of the plurality of display pixel units F, and the first display pixel unit FA includes a first display sub-pixel FA1, a second display sub-pixel FA2, and a third display sub-pixel FA3. The dimming panel 114 includes a plurality of dimming pixel units E. A first dimming pixel unit EB is any one of the plurality of dimming pixel units E. The first dimming pixel unit EB is configured to backlight modulate the first display pixel unit FA.

[0149] The input control circuit 120 includes a first gray scale value corresponding to the first display sub-pixel FA1, a second gray scale value corresponding to the second display sub-pixel FA2, and a third gray scale value corresponding to the third display sub-pixel FA3. For example, the first gray scale value is greater than the second gray scale value, and the second gray scale value is greater than the third gray scale value.

[0150] S120, according to the first gray scale value, the second gray scale value, and the third gray scale value, obtaining a display gray scale value of the first display sub-pixel, a display gray scale value of the second display sub-pixel, a display gray scale value of the third display sub-pixel, and a display gray scale value of the first dimming pixel unit.

[0151] To solve the color mixing abnormality problem, when the first display sub-pixel FA1, the second display sub-pixel FA2, and the third display sub-pixel FA3 in the first display pixel unit FA display the first gray scale value, the second gray scale value, and the third gray scale value respectively, the display device 100 can control the actual display gray scale value of the first display sub-pixel FA1 to be equal to the first gray scale value, the actual display gray scale value of the second display sub-pixel FA2 to be less than the second gray scale value, and the actual display gray scale value of the third display sub-pixel FA3 to be less than the third gray scale value through the color mixing algorithm. The actual display gray scale value of the first dimming pixel unit EB is equal to the first gray scale value.

[0152] The display device 100 reduces the actual display gray scale value of the second display sub-pixel FA2 to be less than the second gray scale value and reduces the actual display gray scale value of the third display sub-pixel FA3 to be less than the third gray scale value through the color mixing algorithm, so that the display of the second display sub-pixel FA2 and the third display sub-pixel FA3 achieves the expected effect, that is, the actual brightness is close to or equal to the target brightness. In some examples, the actual display gray scale value of the second display sub-pixel FA2, the first gray scale value to be displayed, and the second gray scale value to be displayed have the following relationship (6):

[0153] The actual display gray scale value of the third display sub-pixel FA3, the first gray scale value to be displayed and the third gray scale value to be displayed have the following formula (7) correlation:

[0154] Wherein, a represents the gamma value of the first luminance curve G1. β represents the gamma value of the second luminance curve G2. The first luminance curve G1 is used to represent the mapping relationship between different gray scale values and luminance in the dimming panel 114. The second luminance curve G2 is used to represent the mapping relationship between different gray scale values and luminance in the display panel 112.

[0155] Exemplarily, taking the first gray scale value in the gray scale to be displayed in the input image as R192, the second gray scale value as G55 and the third gray scale value as B13, i.e. g in_R = 192, g in_G = 55, g in_B = 13. Then the gray scale value corresponding to the first display sub-pixel FA1 is R192, the gray scale value corresponding to the second display sub-pixel FA2 is G55 and the gray scale value corresponding to the third display sub-pixel FA3 is B13, and the gray scale value corresponding to the first dimming pixel unit EB is R192.

[0156] According to the display mode shown by D in FIG. 8, it can be known that the gray scale value displayed by the first display sub-pixel FA1 in the first display pixel unit FA is R192, i.e. gout_main_R = 192. The gray scale value displayed by the second display sub-pixel FA2 is G55, i.e. gout_main_G = 55. The gray scale value displayed by the third display sub-pixel FA3 is B13, i.e. gout_main_B = 13. The gray scale value of the first dimming pixel unit EB in the dimming panel 114 takes the maximum value 192 among the first gray scale value, the second gray scale value and the third gray scale value, i.e. g out_sub = 192.

[0157] Since g out_sub = 192 > gout_main_G = 55, g out_sub = 192 > gout_main_B = 13, g out_sub = g out_main = g in , the second display sub-pixel FA2 in the first display pixel unit FA of the display screen 110 does not display according to the normal gamma value, because only when g out_sub = 55 = g out_main = G55, the second display sub-pixel FA2 in the display screen 110 displays according to the normal gamma value. Similarly, the third display sub-pixel FA3 in the first display pixel unit FA of the display screen 110 also does not display according to the normal gamma value, because only when g out_subWhen gout_main_B = 13, the third display sub-pixel FA3 in the display screen 110 displays normally according to the normal gamma value.

[0158] In order to make the display screen 110 display normally, the gray scale values of the second display sub-pixel FA2 and the third display sub-pixel FA3 in the display panel 112 can be reduced, so that the display screen 110 displays the same brightness as the target brightness.

[0159] Specifically, the gray scale values of the second display sub-pixel FA2 and the third display sub-pixel FA3 can be determined by the following formula (8).

[0160] Wherein, g out_main represents the gray scale value of the second display sub-pixel FA2 or the third display sub-pixel FA3, g in represents the second gray scale value to be displayed corresponding to the second display sub-pixel FA2 or the third gray scale value to be displayed corresponding to the third display sub-pixel FA3, g in_max represents the maximum value in the gray scale to be displayed, such as the first gray scale value to be displayed corresponding to the first display sub-pixel FA1, and a represents the gamma value of the first brightness curve G1. β represents the gamma value of the second brightness curve G2. The first brightness curve G1 is used to represent the mapping relationship between different gray scale values and brightness in the dimming panel 114. The second brightness curve G2 is used to represent the mapping relationship between different gray scale values and brightness in the display panel 112.

[0161] Based on the first gray scale value, the second gray scale value, the third gray scale value and the formula (8), the formula (6) and the formula (7) can be obtained, which will not be described here.

[0162] In an example, taking a = 1.0, β = 1.2, the first gray scale value in the gray scale to be displayed is R192, the second gray scale value is G55, and the third gray scale value is B13 as an example. The gray scale value of the first dimming pixel unit EB in the dimming panel 114 is the maximum gray scale value among the first gray scale value, the second gray scale value and the third gray scale value, that is, g out_sub = g in_max = 192.

[0163] According to the display mode shown by D in FIG. 8, the input gray scale values of the first display sub-pixel FA1, the second display sub-pixel FA2 and the third display sub-pixel FA3 are: g out_sub = g in_max = 192 > g

[0164] To solve the color mixing problem, the actual display gray scale value of the second display sub-pixel FA2 and the third display sub-pixel FA3 can be reduced according to formula (6), formula (7) or formula (8) to make the display of the second display sub-pixel FA2 and the third display sub-pixel FA3 achieve the expected effect.

[0165] The actual display gray scale value of the second display sub-pixel FA2 is equal to:

[0166] When the gray scale value of the first dimming pixel unit EB in the dimming panel 114 is 192 and the gray scale value of the second display sub-pixel FA2 in the display panel 112 is G19, So that the actual display brightness of the display screen 110 is the same as or close to the target brightness.

[0167] The actual display gray scale value of the third display sub-pixel FA3 is equal to:

[0168] It can be seen that in order to make the first gray scale value R192, the second gray scale value G55 and the third gray scale value B13 to be displayed in the display screen 110 to appear color mixing abnormal problem, the actual display gray scale value of the first display sub-pixel FA1 is: gout_main_R=192. The actual display gray scale value of the second display sub-pixel FA2 is: gout_main_G=19 (rounded) The actual display gray scale value of the third display sub-pixel FA3 is: gout_main_B=1 (rounded). The inconsistency between the theoretical and actual display screens when displaying the color mixing screen in the display screen 110 can be improved, and the display effect is closer to the actual color.

[0169] In addition to the color mixing abnormal problem of the display screen 110, because the display screen 110 is realized by two layers of panels, the display panel 112 and the dimming panel 114 have a certain distance, although the picture is normal at the normal viewing angle, but there will be ghosting and large viewing angle font edge darkening problems when looking at the screen at a large viewing angle.

[0170] As shown in FIG. 11, a display screen at different viewing angles is shown. Since the sensitivity of the human eye to contrast is limited, when the background brightness is low, the contrast between the image and the background is relatively low, which reduces the sensitivity of the human eye to image details and ghosting phenomenon. Therefore, when the background brightness is low, even if there is ghosting, it may be difficult to detect due to insufficient contrast, and the large viewing angle ghosting problem is more prominent when the background brightness is high.

[0171] To improve the problem of large viewing angle ghosting when the background brightness is large, the second display method provided by the embodiments of the present disclosure can be applied to the display device, by segmenting the second brightness curve G2 corresponding to the display panel 112 and the first brightness curve G1 corresponding to the dimming panel 114, and adjusting the brightness by segmentation, to improve the problem of large viewing angle ghosting when the background brightness is large. As shown in FIG. 12, the second display method specifically includes steps S210-S220:

[0172] S210, obtaining a to-be-displayed gray scale value.

[0173] Exemplarily, the to-be-displayed gray scale value is a gray scale value in an input image of the display device.

[0174] S220, determining display gray scale values of the display panel and the dimming panel according to the to-be-displayed gray scale value, the first brightness curve, and the second brightness curve.

[0175] In some possible embodiments, the first brightness curve G1 includes continuous multiple sub-brightness curves, and the gamma values corresponding to the sub-brightness curves are different. The second brightness curve G2 includes continuous multiple sub-brightness curves, and the gamma values corresponding to the sub-brightness curves are different.

[0176] As shown in FIG. 13, a schematic diagram of the relationship among a first brightness curve G1, a second brightness curve G2, and a third brightness curve G3 is shown. The first brightness curve G1 includes a first sub-brightness curve G11 and a second sub-brightness curve G12. The second brightness curve G2 includes a third sub-brightness curve G21 and a fourth sub-brightness curve G22. The first sub-brightness curve G11 corresponds to a first gamma value, the second sub-brightness curve G12 corresponds to a second gamma value, the third sub-brightness curve G21 corresponds to a third gamma value, and the fourth sub-brightness curve G22 corresponds to a fourth gamma value.

[0177] The sum of the first gamma value and the third gamma value is equal to the sum of the second gamma value and the fourth gamma value. The first sub-brightness curve G11 and the third sub-brightness curve G21 correspond to a first gray scale interval, the second sub-brightness curve G12 and the fourth sub-brightness curve G22 correspond to a second gray scale interval, the first gray scale interval and the second gray scale interval are continuous, and the maximum gray scale value of the first gray scale interval is less than the minimum gray scale value of the second gray scale interval.

[0178] In some examples, 256 gray scales of L0-L255 are divided into two continuous gray scale intervals, for example, a first gray scale interval L0-LX and a second gray scale interval LX-L255.

[0179] As shown in FIG. 13, taking the gamma value of the third luminance curve G3 corresponding to the display screen 110 as 2.2 at LX=L127 gray scale. For the dimming panel 114, the first segment sub-luminance curve G11 in the first luminance curve G1 has a luminance transmittance gradually changing from 0% to 100% in the gray scale-luminance relationship in the first gray scale interval (L0-L127), and the gamma value is a straight line with a gamma value of 1, and the gamma value becomes 0. The second segment sub-luminance curve G12 has a luminance transmittance of 100% in the gray scale-luminance relationship in the second gray scale interval (L127-L255), and the luminance remains maximum unchanged, and the corresponding gamma value is equal to 0.

[0180] For the display panel 112, the third segment sub-luminance curve G21 in the second luminance curve G2 has a luminance transmittance gradually changing from 0% to 21.58% in the gray scale-luminance relationship in the first gray scale interval (L0-L127), and the gamma value changes from 1.2 to 2.2. The fourth segment sub-luminance curve G22 has a gamma value unchanged at 2.2 in the second gray scale interval (L127-L255).

[0181] Exemplarily, when 127≤g in <255: Tr_sub=1

[0182] The gray scale-luminance transmittance corresponding to the third luminance curve G3 corresponding to the display screen 110 satisfies:

[0183] When 0≤g in <127:

[0184] The gray scale-luminance transmittance corresponding to the third luminance curve G3 corresponding to the display screen 110 satisfies:

[0185] That is, when 0≤g in ≤255, the Gamma of the display screen 110 is 2.2, which satisfies the expected effect.

[0186] In the above embodiment, the first gray scale interval (L0-LX) and the second gray scale interval (LX-L255) corresponding to the first luminance curve G1 or the second luminance curve G2 in setting the gamma value can be determined according to the actual product needs (i.e. the selection of the gamma value in the segmented luminance curve is irrelevant to the value of X). In order to solve the ghosting problem when the background gray scale value is greater than the segmented gray scale value X (such as 127), the second gray scale interval (LX-L255) selects the curve keeping the maximum luminance unchanged for the dimming panel 114, which effectively alleviates the ghosting problem under large viewing angle, so as to realize the improvement of the ghosting problem in the high gray scale scene through the Gamma segmented value mode.

[0187] In some examples, the first luminance curve G1 includes a plurality of continuous piecewise sub-luminance curves, each of the plurality of continuous piecewise sub-luminance curves corresponding to a piecewise gray scale interval. The first piecewise sub-luminance curve G11 corresponds to a first gray scale interval, the second piecewise sub-luminance curve G12 corresponds to a second gray scale interval, and the first piecewise sub-luminance curve G11 corresponds to a first gamma value that is greater than a second gamma value corresponding to the second piecewise sub-luminance curve G12.

[0188] In some examples, the first piecewise sub-luminance curve G11 and the second piecewise sub-luminance curve G12 are any two continuous piecewise sub-luminance curves of the plurality of continuous piecewise sub-luminance curves of the first luminance curve G1. The first gray scale interval and the second gray scale interval are continuous, and a maximum gray scale value of the first gray scale interval is less than a minimum gray scale value of the second gray scale interval.

[0189] For example, as shown in FIG. 14, FIG. 14 shows a schematic diagram of a relationship between a first luminance curve G1, a second luminance curve G2, and a third luminance curve G3. The first luminance curve G1 and the second luminance curve G2 are each provided as four piecewise sub-luminance curves. Taking the first luminance curve G1 as an example, the first luminance curve G1 includes a first piecewise sub-luminance curve G11, a second piecewise sub-luminance curve G12, a third piecewise sub-luminance curve G13, and a fourth piecewise sub-luminance curve G14.

[0190] In some examples, the first gray scale interval L0-La (e.g., L0-L30) corresponds to the first piecewise sub-luminance curve G11, the second gray scale interval La-Lb (e.g., L30-L100) corresponds to the second piecewise sub-luminance curve G12, the third gray scale interval Lb-Lc (e.g., L100-L127) corresponds to the third piecewise sub-luminance curve G13, and the fourth gray scale interval Lc-L255 (e.g., L127-L255) corresponds to the fourth piecewise sub-luminance curve G14.

[0191] In order to maintain smooth transition of the luminance curve of the dimming panel 114, the gray scale value range corresponding to each piecewise sub-luminance curve is different, and the gamma values corresponding to the first piecewise sub-luminance curve G11, the second piecewise sub-luminance curve G12, the third piecewise sub-luminance curve G13, and the fourth piecewise sub-luminance curve G14 decrease.

[0192] Specifically, as shown in FIG. 14, the first piecewise sub-luminance curve G11 corresponds to a large gamma value, and the luminance of the dimming panel 114 changes smoothly. The second piecewise sub-luminance curve G12 corresponds to an intermediate gamma value, and the luminance of the dimming panel 114 changes significantly. The third piecewise sub-luminance curve G13 corresponds to a small gamma value, which makes the transition of the dimming panel 114 to the brightest Lc stage smooth. The fourth piecewise sub-luminance curve G14 corresponds to a gamma value of zero, and the dimming panel 114 maintains the maximum luminance.

[0193] The second luminance curve G2 corresponding to the display panel 112 is also set as four sub-luminance curves, but in order to keep the gamma value corresponding to the third luminance curve G3 as a constant value (such as gamma value of 2.2 or 3.2), the gamma value corresponding to the sub-luminance curve in the second luminance curve G2 is opposite to the gamma value corresponding to the sub-luminance curve in the first luminance curve G1.

[0194] In yet some examples, the gray scale value corresponding to the intersection position of the last two sub-luminance curves in the first luminance curve G1 or the second luminance curve G2 is greater than 85 and less than 255. For example, the gray scale value corresponding to the intersection position of the last two sub-luminance curves can be 127.

[0195] For example, when the first luminance curve G1 or the second luminance curve G2 is divided into two segments (L0-LX) and (LX-L255), if LX takes the maximum value LX=255, it is equivalent to that the luminance curve is divided into one segment, and the gamma values of the display panel 112 and the dimming panel 114 are respectively taken as a constant value. For example, the gamma of the display panel 112 is taken as 1.2, the gamma of the dimming panel 114 is taken as 1.0, and the overall gamma of the display screen 110 is 2.2.

[0196] According to the actual display effect, when the value of LX is relatively small, as shown in FIG. 15, which shows a schematic diagram of the relationship between the first luminance curve, the second luminance curve and the third luminance curve. When LX=L20, the slope of the dimming panel 114 changes from 0 to 100% for 0-20 gray scale, and the gamma value of the display panel 112 remains unchanged for L20 and above. The overall gamma curve of the display screen 110 is 2.2, and the gamma value of the display panel 112 is adjusted to 2.2 for L20 and above. The luminance of the dimming panel 114 is improved at low gray scale, and the L0 luminance of the RGB pixel unit of the display panel 112 will be large, which leads to the white display of the pure color picture L20 and below. When the value of LX is relatively large, the background picture is bright, and the halo is easy to be seen.

[0197] As shown in FIG. 16, which shows a partial enlarged schematic diagram of the luminance curve L20 and below in FIG. 15. At this time, since the gray scale value corresponding to the maximum luminance is L20 and above, the overall luminance of the dimming panel 114 is adjusted, which easily leads to the overall white display of the low gray scale pure color picture.

[0198] According to the actual display effect, through data testing, it can be obtained that when LX≥L85 gray scale, the pure color picture display is not affected. Therefore, when the luminance curve is divided into two segments L0-LX and LX-L255, the selection range of LX is L255≥LX≥L85. For example, LX=L127, which does not affect the display effect of the low gray scale pure color picture, and improves the ghosting problem when the background is high gray scale.

[0199] For the color mixing abnormality problem shown in FIG. 8, although it can be improved by the embodiments shown in formula (6), formula (7) or formula (8), there is still a large viewing angle ghosting problem. For example, while the color mixing abnormality problem is improved, the large viewing angle ghosting problem can be further improved. The segmented adjustment mode of the luminance curve in the embodiments shown in FIG. 13 or FIG. 14 can be applied to the schemes shown in formula (6), formula (7) or formula (8).

[0200] In some possible embodiments, for example, in the embodiment shown in FIG. 13, that is, LX=L127 gray scale, the first luminance curve G1 corresponding to the display panel 112 and the second luminance curve G2 corresponding to the dimming panel 114 are divided into two sub-luminance curves corresponding to the L0-L127 and L127-L255 gray scale intervals. The gamma value corresponding to the first sub-luminance curve G11 in the first luminance curve G1 is 1, and the gamma value corresponding to the second sub-luminance curve G12 is 0. The gamma value corresponding to the third sub-luminance curve G21 in the second luminance curve G2 is 1.2, and the gamma value corresponding to the fourth sub-luminance curve G22 is 2.2.

[0201] When the to-be-displayed gray scale value g in =0 in the input image, the ideal luminance Tr_total=0, and the luminance is normal.

[0202] When the to-be-displayed gray scale value g in ≥127 in the input image, the luminance is normal.

[0203] When the to-be-displayed gray scale value 0 in <127 in the input image, and g in =g in_max , the luminance is normal.

[0204] When the to-be-displayed gray scale value 0 in <127 in the input image, and g in <g in_max , the luminance is higher than the target luminance, and the color mixing is abnormal.

[0205] In order to solve the problem that when the to-be-displayed gray scale value 0 in <127 in the input image, and g in <g in_max , the actual luminance is higher than the target luminance, and the color mixing is abnormal, the pixel units with actual luminance higher than the target luminance can be reduced in luminance to be the same as the target luminance.

[0206] Specifically, when the gray scale value to be displayed in the input image is 0 < g in <127, the following formula (9) is used for calibration:

[0207] When g in_max ≥ 127, let g in_max = 127, the following formula (10) is used for calibration:

[0208] For example, the first gray scale value in the input image to be displayed is R192, the second gray scale value is G55, and the third gray scale value is B13. The gray scale value of the first dimming pixel unit EB in the dimming panel 114 is the maximum gray scale value among the first gray scale value, the second gray scale value, and the third gray scale value, i.e., g out_sub = g in_max = 192. Before the calibration of formula (9) or formula (10), the input gray scale values of the first display sub-pixel FA1, the second display sub-pixel FA2, and the third display sub-pixel FA3 are gout_main_R = 192, gout_main_G = 55, and gout_main_B = 13, respectively. After the calibration of formula (9) or formula (10), the input gray scale values of the first display sub-pixel FA1, the second display sub-pixel FA2, and the third display sub-pixel FA3 are gout_main_R = 192, gout_main_G = 17 (rounded), and gout_main_B = 2 (rounded), respectively.

[0209] Test verification shows that the color coordinates of the pure color image R192 are x = 0.6700, y = 0.3150, and the brightness is Lv = 31.1 nit. The color coordinates of the pure color image G55 are x = 0.2770, y = 0.6330, and the brightness is Lv = 7.6 nit. The color coordinates of the pure color image B13 are x = 0.1540, y = 0.1040, and the brightness is Lv = 0.12 nit. The theoretical color coordinates of the mixed color image R192+G55+B13 are x = 0.6225, y = 0.3469, and the brightness is Lv = 38.82. After the calibration of formula (9) or formula (10), the actual color coordinates of the mixed color image R192+G55+B13 of the display panel 112 are x = 0.6340, y = 0.3460, and the brightness is Lv = 38.1 nit. The difference with the theoretical value is small (brightness difference -0.72 nit, Δx = -0.0115, Δy = 0.0009). The mixed color is normal.

[0210] For example, in the case of applying the segmented adjustment manner of the luminance curve as shown in the embodiment of FIG. 13 to the scheme shown in the formulas (6) and (7), as shown in FIG. 17, the step S120 shown in FIG. 9 specifically includes steps S121-S122:

[0211] S121, when the first gray scale value is less than the preset threshold value, obtaining the display gray scale value of the first display sub-pixel, the display gray scale value of the second display sub-pixel, the display gray scale value of the third display sub-pixel, and the display gray scale value of the first dimming pixel unit according to the first gray scale value, the second gray scale value, the third gray scale value, the gamma value of the first segment sub-luminance curve, and the gamma value of the third segment sub-luminance curve.

[0212] In some examples, when the first gray scale value belongs to the first gray scale interval, the actual display gray scale value of the second display sub-pixel FA2, the first gray scale value to be displayed, and the third gray scale value to be displayed have the following formula (12) relationship:

[0213] The actual display gray scale value of the third display sub-pixel FA3, the first gray scale value to be displayed, and the third gray scale value to be displayed have the following formula (12) relationship:

[0214] S122, when the first gray scale value is greater than the preset threshold value, obtaining the display gray scale value of the first display sub-pixel, the display gray scale value of the second display sub-pixel, the display gray scale value of the third display sub-pixel, and the display gray scale value of the first dimming pixel unit according to the preset threshold value, the first gray scale value, the second gray scale value, the third gray scale value, the gamma value of the first segment sub-luminance curve, and the gamma value of the third segment sub-luminance curve.

[0215] In some examples, when the first gray scale value belongs to the second gray scale interval, the maximum gray scale value of the first gray scale interval, the second gray scale value, and the actual display gray scale value of the second display sub-pixel FA2 have the following formula (13) relationship:

[0216] The maximum gray scale value of the first gray scale interval, the third gray scale value, and the actual display gray scale value of the third display sub-pixel FA3 have the following formula (14) relationship:

[0217] Wherein, a represents the gamma value of the first segment sub-luminance curve G11, β represents the gamma value of the third segment sub-luminance curve G21, and the preset threshold value is the maximum gray scale value of the first gray scale interval or the minimum gray scale value of the second gray scale interval.

[0218] To improve the display effect of the display device, the present disclosure also provides an embodiment for improving the ghosting problem when looking at the screen at a large viewing angle and the dark font edge problem at a large viewing angle as shown in FIG. 11. The ghosting problem when looking at the screen at a large viewing angle is caused by the fact that when the display panel 112 and the dimming panel 114 display the same picture, the upper and lower pictures do not overlap together at a large viewing angle, resulting in ghosting on the screen. The dark font edge problem at a large viewing angle is caused by the fact that when a user looks at the sub-dimming area lit on the display panel 112 at a large viewing angle, the pixels of the dimming panel 114 corresponding to the line of sight are not lit when the line of sight is directed to the dimming panel 114, thus causing the font edge to be darker when the user looks at the display picture at a large viewing angle than at a normal viewing angle.

[0219] The present disclosure provides an embodiment that can adjust the gray scale value corresponding to the dimming pixel unit E in the dimming panel 114, perform a transition operation (such as through a transition algorithm or a filtering algorithm) at a position where the gray scale changes greatly, and make the gray scale change gently to improve the ghosting problem. In addition, for the dark font edge problem caused by the low background brightness of the dimming panel 114 corresponding to the bright line or bright block of the display panel 112, the width of the bright line or bright block of the dimming panel 114 can be expanded to improve the problem, such as by performing an expansion operation (such as through an expansion algorithm).

[0220] FIG. 18 shows a display area partitioning diagram of a display panel 112 or a dimming area partitioning diagram of a dimming panel 114. In FIG. 18, X represents the horizontal coordinate, and the figure shows -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8. Y represents the vertical coordinate, and the figure shows -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8. FIG. 18 shows 17x17 partitions. The partitions shown in FIG. 18 start from the partition position indicated by the coordinate (0, 0) and are distributed in a ring shape away from the partition indicated by the coordinate (0, 0) in turn, such as the partition where the number 1 is located and the partitions where the numbers 2, 3, 4, 5, 6, 7, and 8 are located.

[0221] Taking one of the partitions determined by the (X, Y) coordinates as an example, the display area of the display panel 112 includes a plurality of sub-display areas, and the dimming area of the dimming panel 114 includes a plurality of sub-dimming areas. Meanwhile, taking at least one display pixel unit F in each sub-display area and at least one dimming pixel unit E in each sub-dimming area as an example.

[0222] In some possible embodiments, Figure 19 shows a sub-dimming zone position diagram, when performing the expansion operation, in the N x N region around the target sub-dimming zone, the maximum gray scale value of the gray scale value of any original sub-dimming zone in the N x N sub-dimming zones (i.e. the original gray scale value, or the original data) is taken as the gray scale value of the target sub-dimming zone.

[0223] As shown in Figure 19, in the 3 x 3 sub-dimming zone position around the target sub-dimming zone f(x, y), the maximum gray scale value corresponding to the sub-dimming zone is taken as an example, as shown in equation (15): f(x, y) = MAX[f(x-1, y-1), f(x-1, y), f(x-1, y+1), f(x, y-1), f(x, y), f(x, y+1), f(x+1, y-1), f(x+1, y), f(x+1, y+1)] Equation (15)

[0224] As shown in Figure 20, a diagram showing the original gray scale values in the 3 x 3 sub-dimming zones of the dimming panel 114, the 3 x 3 region can be any 3 x 3 region in Figure 18. The original gray scale values in the 3 x 3 region in Figure 20 include gray scale value L27 (first row, first column), gray scale value L20 (first row, second column), gray scale value L11 (first row, third column), gray scale value L78 (second row, first column), gray scale value L100 (second row, second column), gray scale value L32 (second row, third column), gray scale value L143 (third row, first column), gray scale value L106 (third row, second column), and gray scale value L58 (third row, third column) 9 sub-dimming zones. For the target sub-dimming zone corresponding to the position of the second row and the second column, the maximum value of the gray scale values in the sub-dimming zone positions in the 3 x 3 region around the position of the second row and the second column is taken to obtain the expanded gray scale value L143 at the target sub-dimming zone.

[0225] In some examples, as shown in Figure 21, a diagram showing the gray scale value distribution of the sub-dimming zones of the dimming panel 114. As shown in Figure 21, taking the 5 x 5 sub-dimming zones in the middle of the dimming panel 114 with gray scale value L255 as a bright block, and the gray scale values of the other sub-dimming zones as L0 gray scale as an example, after 1 expansion, a diagram showing the gray scale value distribution of the sub-dimming zones of the dimming panel 114 is shown in Figure 22.

[0226] In other examples, as shown in Figure 23, a diagram showing the gray scale value distribution of the sub-dimming zones of the dimming panel 114. As shown in Figure 23, taking the 17 x 1 sub-dimming zones in the middle of the dimming panel 114 with gray scale value L255 as a bright block, and the gray scale values of the other sub-dimming zones as L0 gray scale as an example, after 1 expansion, a diagram showing the gray scale value distribution of the sub-dimming zones of the dimming panel 114 is shown in Figure 24.

[0227] As shown in the implementation of the expansion operation in FIG. 19, 17, 18, 19, 20 and FIG. 24, when the original gray scale value of the dimming panel 114 is greater than or equal to 10% of the gray scale value range (e.g., L0-L255) (≥255x10%), the expansion algorithm will obviously aggravate the halo or ghost problem. When the original gray scale value of the dimming panel 114 is less than or equal to 6% of the gray scale value range (e.g., L0-L255) (≤255x6%), the gray scale value is not expanded, and the line darkening is obviously aggravated.

[0228] To avoid the problem of aggravating halo or line darkening, when the expansion algorithm is performed, the gray scale value corresponding to the original gray scale value (or brightness) of 6% to 10% of the dimming panel 114 can be selected as the reference gray scale value. For example, the gray scale value corresponding to less than 8% of the brightness can be selected as the reference gray scale value. The gray scale value less than the reference gray scale value of the original gray scale value of the dimming panel 114 is expanded to avoid the problem of aggravating halo or line darkening.

[0229] The original gray scale value (or brightness) corresponding to the first brightness curve G1 of the dimming panel 114 is different.

[0230] In an example, when the first brightness curve G1 of the dimming panel 114 is a segment, and corresponds to a gamma value. When the gray scale value less than the gray scale value corresponding to 8% of the original gray scale value (or brightness) is selected to perform the expansion algorithm, taking the 256 gray scale values of L0-L255 as an example, the reference gray scale value can be 255x8%=21 (20.4 rounded).

[0231] In another example, when the first brightness curve G1 of the dimming panel 114 includes a first sub-brightness curve G11 and a second sub-brightness curve G12, and the gray scale value less than the gray scale value corresponding to 8% of the original gray scale value (or brightness) is selected to perform the expansion algorithm. As shown in FIG. 13, when the original gray scale value belongs to the gray scale interval (L0-L127) corresponding to the first sub-brightness curve G11, the corresponding reference gray scale value can be 127x8%=10 (10.16 rounded).

[0232] As shown in FIG. 25, an original gray scale value in a 3x3 sub-dimming area in a dimming panel 114 is shown. The 3x3 sub-dimming area can be any 3x3 partition as shown in FIG. 18.

[0233] The original gray scale values in the 3x3 sub-dimming area in FIG. 25 include gray scale value L27 (first row, first column), gray scale value L20 (first row, second column), gray scale value L11 (first row, third column), gray scale value L78 (second row, first column), gray scale value L9 (second row, second column), gray scale value L32 (second row, third column), gray scale value L143 (third row, first column), gray scale value L106 (third row, second column), and gray scale value L58 (third row, third column).

[0234] Taking the reference gray scale value L10 as an example, the gray scale value at the sub-dimming area in the second row, second column is 9, which is less than 10, and there can be a problem of font edge darkening in the sub-display area corresponding to the sub-dimming area in the second row, second column of the display panel 112 due to the too low brightness of the sub-dimming area in the second row, second column of the dimming panel 114. By dilating the sub-dimming area in the second row, second column, taking the maximum value of the gray scale values of the 3x3 sub-dimming areas around the sub-dimming area in the second row, second column, the dilated gray scale value L143 at the position of the second row, second column is obtained.

[0235] In some possible embodiments, taking the sub-dimming area position diagram shown in FIG. 19 as an example, when performing the transition (filtering) operation, mean filtering can be performed, and in the dimming panel 114, a weighted average value is calculated in the NxN sub-dimming areas around the target sub-dimming area, so that the gray scale changes gently to improve the ghosting problem.

[0236] It should be noted that the selection of the NxN sub-dimming area is related to the target sub-dimming area and the spatially adjacent sub-dimming areas. The improved gray scale value of the target sub-dimming area needs to be determined according to the gray scale values of the spatially adjacent sub-dimming areas of the target sub-dimming area.

[0237] The minimum unit of the NxN sub-dimming area is 3x3. The surrounding sub-dimming areas are symmetric to the target sub-dimming area. Since the NxN even sub-dimming area is not symmetric to the center sub-dimming area (target sub-dimming area), it is not selected. The odd range such as 3x3, 5x5, 7x7, etc. can be operated twice with a 3x3 range, which is equivalent to one 5x5 operation, or three 3x3 operations instead of one 7x7 operation. Two 3x3s require 3x3x2=18 parameters, and one 5x5 requires 5x5=25 parameters. It can be seen that 3x3 occupies less resources. Using a 3x3 operation matrix can reduce the number of parameters, reduce the amount of data transmission, and improve the calculation efficiency.

[0238] As shown in FIG. 19, taking the 3x3 sub-dimming zones around the target sub-dimming zone as an example. FIG. 26 shows a schematic diagram of a transition operation process. The to-be-displayed gray scale value of the input image in the dimming panel 114 is subjected to an operation function, and the output image in the dimming panel 114 is obtained, i.e., the gray scale value actually displayed by the dimming panel 114. Among them, the input image and the output image in the dimming panel 114 have a numerical relationship in the 3x3 region around the target sub-dimming zone, and the input image is subjected to operation with the 3x3 operation matrix to obtain the output image.

[0239] The operation matrix has different weights for each sub-dimming zone, and different weights are adjusted to achieve various transition effects, and the parameters are normalized. The determination of the operation matrix can be summarized through actual test effects according to the spatial position relationship of adjacent sub-dimming zones, and is not unique.

[0240] As shown in FIG. 27, a schematic diagram of the position of a sub-dimming zone and an operation matrix is shown, which can be operated according to the following formula (16): f(x, y)*g(m, n) = ∑(x, y)*g(m-x, n-y) = [f(x-1, y-1)*g(1, 1)+f(x, y-1)*g(0, 1)+f(x+1, y-1)*g(-1, 1)+f(x-1, y)*g(1, 0)+f(x, y)*g(0, 0)+f(x+1, y)*g(-1, 0)+f(x-1, y+1)*g(1, -1)+f(x, y+1)*g(0, -1)+f(x+1, y+1)*g(-1, -1)] Equation (16)

[0241] FIG. 28 shows a schematic diagram of an operation process. It involves the original gray scale value, the operation matrix, and the operation of the original gray scale value and the operation matrix to obtain the transition gray scale value. The specific calculation process is: 27*0.0938+20*0.0938+11*0.0938+78*0.0938+9*0.25+32*0.0938+143*0.0938+106*0.0938+58*0.0938=46.781, and the gray scale value of the target sub-dimming zone is 46.781.

[0242] In some examples, the operation shown in FIG. 28 can be a convolution operation. The operation matrix in FIG. 27 can be a convolution kernel.

[0243] In some examples, taking the distribution of the gray scale value after the first expansion of the gray scale value in the dimming panel 114 as shown in FIG. 22 and the operation implementation process as shown in FIG. 28 as an example, after the first filtering operation, the distribution of the gray scale value in the dimming panel 114 is shown in FIG. 29. After the second filtering operation, the distribution of the gray scale value in the dimming panel 114 is shown in FIG. 30. After the third filtering operation, the distribution of the gray scale value in the dimming panel 114 is shown in FIG. 31.

[0244] In some examples, the distribution of the gray scale values in the dimming panel 114 after the gray scale values are sequentially expanded as shown in FIG. 24 and the operation matrix as shown in FIG. 28 is taken as an example. After the first filtering operation, the distribution of the gray scale values in the dimming panel 114 is shown in FIG. 32. After the second filtering operation, the distribution of the gray scale values in the dimming panel 114 is shown in FIG. 33. After the third filtering operation, the distribution of the gray scale values in the dimming panel 114 is shown in FIG. 34. Table 1 shows the original gray scale values (to-be-displayed gray scale values) corresponding to any horizontal row of different sub-dimming area positions in FIG. 34 and the gray scale values after the expansion algorithm is performed once and the filtering algorithm is performed three times.

[0245] Table 1

[0246] In yet some examples, the present disclosure provides a third display method, which can be applied to the display device 100 as shown in FIG. 1, FIG. 2 or FIG. 11 to improve the display effect of the display device 100 to implement the embodiment of the distribution of the gray scale values in the dimming panel 114 as shown in FIG. 31 or FIG. 34. The third display method specifically includes steps S310-S320 as shown in FIG. 35:

[0247] S310, obtaining the gray scale values corresponding to the first display area and the second display area in the to-be-displayed gray scale values. The gray scale value corresponding to the first display area is greater than the gray scale value corresponding to the second display area. The first display area and the second display area are adjacent in the display panel.

[0248] Taking the display panel 112 for displaying a black-and-white picture as an example, the black-and-white picture includes two pure color regions, i.e., the first pure color region and the second pure color region. The gray scale value of the first pure color region is greater than that of the second pure color region.

[0249] In an example, FIG. 36 shows a schematic diagram of a display mode of a display panel and a dimming panel in a display screen.

[0250] Taking the first pure color region as a bright block as an example, the display panel 112 as shown in A of FIG. 36 includes adjacent first display area P1 and second display area P2. The first display area P1 is used to display the first pure color region, and the second display area P2 is used to display the second pure color region. The gray scale value of the first display area P1 is greater than that of the second display area P2.

[0251] The dimming panel 114 as shown in B of FIG. 36 includes adjacent first dimming area Q1 and second dimming area Q2. The first dimming area Q1 is used to dim the picture of the first display area P1, and the second dimming area Q2 is used to dim the picture of the second display area P2.

[0252] In another example, FIG. 37 shows another display manner of the display panel and the dimming panel in the display screen.

[0253] Taking the bright bar as an example of the first pure color area, the display panel 112 shown in FIG. 37A includes adjacent first display area P1 and second display area P2, the first display area P1 is used to display the first pure color area, and the second display area P2 is used to display the second pure color area. The gray scale value of the first display area P1 is greater than that of the second display area P2.

[0254] The dimming panel 114 shown in FIG. 37B includes adjacent first dimming area Q1 and second dimming area Q2. The first dimming area Q1 is used to dim the picture of the first display area P1, and the second dimming area Q2 is used to dim the picture of the second display area P2.

[0255] S320, according to the gray scale value of the first display area and the gray scale value of the second display area, the gray scale values of the first dimming area and the second dimming area are obtained, and the first dimming area and the second dimming area are adjacent in the dimming panel.

[0256] The first dimming area is used to dim the picture of the first display area, and the second dimming area is used to dim the picture of the second display area. Since the gray scale value of the first pure color area is greater than that of the second pure color area, there is a gray scale difference between the first display area P1 and the second display area P2 when displayed on the display panel 112. If the gray scale of the first dimming area Q1 and the second dimming area Q2 is not expanded or transitioned, ghosting and darkening at the edge of the first display area P1 are prone to occur when viewed at a large viewing angle.

[0257] After the gray scale value of the first dimming area Q1 corresponding to the display device shown in FIGS. 36 and 37 is expanded, a first area Q21 is obtained relative to the first dimming area Q1, as shown in FIG. 38, a display effect diagram of a display screen device at different viewing angles. The first area Q21 extends to the second dimming area Q2, and the second dimming area Q2 further includes a second area Q22. The gray scale value corresponding to the first area Q21 is greater than that corresponding to the second area Q22, and less than that corresponding to the first dimming area Q1.

[0258] Wherein, the specific size of the first area Q21 extending to the second dimming area Q2 is not limited here, which can extend to the entire second dimming area Q2.

[0259] Then the gray scale values in the first dimming area Q1 and the second dimming area Q2 are transitioned to make the gray scale change gently and improve the ghosting problem.

[0260] After the expansion and transition algorithms are executed, the gray scale value of the first dimming area Q1 is less than or equal to the gray scale value of the first display area P1. The gray scale value of the second dimming area Q2 is less than the gray scale value of the first dimming area Q1 and greater than the gray scale value of the second display area P2.

[0261] In the above embodiments, the display panel 112 and the dimming panel 114 arranged in a stacked manner achieve optimized backlight modulation, and the backlight brightness of different display areas can be accurately controlled, thereby maintaining good contrast at a large viewing angle and reducing brightness unevenness and color distortion. Meanwhile, by adopting the zoning dimming strategy, the gray scale value of the first dimming area Q1 is set to be less than or equal to the gray scale value of the first display area P1, so that the highlight area can be properly supported by the backlight without overexposure. The gray scale value of the second dimming area Q2 is set between the gray scale value of the first dimming area Q1 and the gray scale value of the second display area P2, so that the visibility of dark details is ensured and the edge darkening problem caused by excessive darkening of dark areas is avoided. In addition, by accurately controlling the gray scale value of the dimming panel 114, light can be more uniformly distributed on the display panel 112, light refraction and scattering caused by changes in viewing angle are reduced, and the occurrence of ghosting is effectively reduced, thereby improving visual comfort and visual experience.

[0262] In a specific example, the greater the gray scale difference between the first display area P1 and the second display area P2, the greater the gray scale difference between the first dimming area Q1 and the second dimming area Q2, and the better the effect of executing the expansion algorithm and the transition algorithm. Considering the execution efficiency of the expansion algorithm and the transition algorithm, the execution of the expansion algorithm and the transition algorithm can be triggered when the gray scale difference between the first display area P1 and the second display area P2 reaches a certain threshold. For example, when the gray scale value of the first display area P1 is greater than a first gray scale threshold and the gray scale value of the second display area P2 is less than a second gray scale threshold, the execution of the expansion algorithm and the transition algorithm is triggered.

[0263] Further, for a picture with 256 gray scale levels, the first gray scale threshold can be greater than 85 and less than 255, and the second gray scale threshold can be less than 21.

[0264] Further, considering that when the original gray scale value of the dimming panel 114 is greater than or equal to 10% of the gray scale value range (e.g., L0-L255) (≥255x10%), the expansion algorithm will significantly exacerbate the halo problem. When the original gray scale value of the dimming panel 114 is less than or equal to 6% of the gray scale value range (e.g., L0-L255) (≤255x6%), the gray scale value is not subjected to the expansion algorithm, and the line darkening is significantly exacerbated. The second gray scale threshold can also be set to be less than 10.

[0265] In another specific example, FIG. 39 shows a distribution of gray scale values of sub-dimming zones in a dimming panel. As shown in FIG. 39, the first dimming zone Q1 and the second dimming zone Q2 each include a plurality of sub-dimming zones Q12 arranged repeatedly along a first direction X and a second direction Y, the first direction X being perpendicular to the second direction Y. From the center of the first dimming zone Q1, the gray scale values of the sub-dimming zones Q12 arranged along the first direction X in the first dimming zone Q1 and the second dimming zone Q2 decrease, and the difference in gray scale values between any two sub-dimming zones Q12 with decreasing gray scale values is greater than a first threshold value.

[0266] From the center of the first dimming zone Q1, the gray scale values of the sub-dimming zones Q12 arranged along the second direction Y in the first dimming zone Q1 and the second dimming zone Q2 decrease, and the difference in gray scale values between any two sub-dimming zones Q12 with decreasing gray scale values is greater than the first threshold value.

[0267] Further, the first threshold value can be determined according to the number of gray scale levels displayed by the display device, the expected display effect, and the product cost, etc. For example, the more the number of gray scale levels displayed, the greater the first threshold value can be set, for example, for 256 gray scale levels, the first threshold value can be 1. The better the expected display effect, the smaller the first threshold value can be set.

[0268] Further, as shown in FIG. 39, from the center of the first dimming zone Q1, the gray scale values of the sub-dimming zones Q12 arranged along the first direction X, the opposite direction of the first direction X, the second direction Y, and the opposite direction of the second direction Y in the first dimming zone Q1 and the second dimming zone Q2 decrease, and the difference in gray scale values between any two sub-dimming zones Q12 with decreasing gray scale values is greater than the first threshold value.

[0269] Further, the first dimming zone Q1 and the second dimming zone Q2 each include a plurality of sub-dimming zones Q12, and the gray scale values of the sub-dimming zones Q12 arranged along the first direction X in the plurality of sub-dimming zones Q12 decrease. The first direction X is any direction from the center of the first dimming zone Q1 to the boundary of the first dimming zone Q1.

[0270] In yet another specific example, FIG. 40 shows a distribution of gray scale values of sub-dimming zones in a dimming panel. As shown in FIG. 40, from the center of the first dimming zone Q1, the gray scale values of the sub-dimming zones Q12 arranged along the first direction X in the first dimming zone Q1 and the second dimming zone Q2 decrease, and the difference in gray scale values between any two sub-dimming zones Q12 with decreasing gray scale values is greater than a first threshold value. From the center of the first dimming zone Q1, the difference in gray scale values between any two sub-dimming zones Q12 arranged along the second direction Y in the first dimming zone Q1 and the second dimming zone Q2 is less than a second threshold value. The second threshold value can be set to 1.

[0271] Further, for the dimming panel 114 shown in FIG. 39 or FIG. 40, the gray scale values of the sub-dimming areas Q12 in the first dimming area Q1 and the second dimming area Q2 can be axisymmetric about the preset straight line. The preset straight line passes through the center of the first dimming area Q1 and is parallel to the first direction X or parallel to the second direction Y.

[0272] Further, for the dimming panel 114 shown in FIG. 39 or FIG. 40, the gray scale values of the sub-dimming areas Q12 in the first dimming area Q1 and the second dimming area Q2 can be axisymmetric about the preset straight line. The preset straight line passes through the center of the first dimming area Q1 and is parallel to the first direction X or parallel to the second direction Y.

[0273] Further, for the dimming panel 114 shown in FIG. 39 or FIG. 40, the sub-dimming areas Q12 in the first dimming area Q1 or the second dimming area Q2 include a first sub-dimming area Q12, and a direction from the center of the first dimming area Q1 to the center of the first sub-dimming area Q12 is parallel to the first direction X. From the center of the first sub-dimming area Q12, the gray scale values of the sub-dimming areas Q12 arranged along the second direction Y or the opposite direction of the second direction Y in the first dimming area Q1 or the second dimming area Q2 decrease, and the gray scale value difference between any two sub-dimming areas Q12 with decreasing gray scale values is greater than the first threshold value.

[0274] Further, for the dimming panel 114 shown in FIG. 39 or FIG. 40, the sub-dimming areas Q12 in the first dimming area Q1 or the second dimming area Q2 include a second sub-dimming area Q12, and a direction from the center of the first dimming area Q1 to the center of the second sub-dimming area Q12 is parallel to the second direction Y. From the center of the second sub-dimming area Q12, the gray scale values of the sub-dimming areas Q12 arranged along the first direction X or the opposite direction of the first direction X in the first dimming area Q1 or the second dimming area Q2 decrease, and the gray scale value difference between any two sub-dimming areas Q12 with decreasing gray scale values is greater than the first threshold value.

[0275] In yet some examples, as shown in Table 2, the original gray scale values (to-be-displayed gray scale values) corresponding to different positions of the sub-dimming areas in any horizontal row (along the second direction X) of the dimming panel 114 and the gray scale values after performing the expansion algorithm four times and the filtering algorithm three times are shown.

[0276] Table 2

[0277] According to the embodiment as shown in Table 2, as shown in FIG. 41, the display effect diagram of the display screen device under different viewing angles, the range of the sub-dimming areas used for dimming the display panel 112 on the dimming panel 114 is further expanded, and as shown in Table 2, the gray scale values of the sub-dimming areas decrease along the direction away from the center sub-dimming area, so as to improve the problems such as ghosting, halo, and dark lines under large viewing angles.

[0278] Referring back to FIG. 1, the control circuit 120 can further include an interface circuit, a processor, a display panel display driving circuit, and a light modulation panel display driving circuit, as shown in a structural schematic diagram of a display device in FIG. 42. The control circuit 120 receives an input image through the interface circuit 122, processes the input image through the processor 124, and outputs display signals to the display panel driving circuit 130 and the light modulation panel driving circuit 140, respectively, which are used to drive the display panel 112 and the light modulation panel 114 to display an image.

[0279] The processor 124, such as an FGPA board card, can include a digital signal processing module (Digital Signal Process, DSP) therein, which is responsible for signal algorithm processing. The signal algorithm includes a color mixing algorithm as shown in the embodiments of equation (6), equation (7), or equation (8), or a segmented adjustment algorithm of a gamma curve on a display screen as shown in the embodiments of FIG. 11, FIG. 13, FIG. 14, FIG. 15, and FIG. 16, or a combination algorithm of the color mixing algorithm and the segmented adjustment algorithm of the gamma curve as shown in the embodiments of equation (9), equation (10), equation (11), or equation (12), or a corresponding inflation algorithm when performing an inflation operation as shown in the embodiments of FIG. 19, FIG. 20, FIG. 21, FIG. 22, FIG. 23, FIG. 24, and FIG. 25, or a corresponding filtering algorithm when performing a transition operation as shown in the embodiments of FIG. 26, FIG. 27, and FIG. 28.

[0280] The processor 124 outputs the display signals processed through the signal algorithm to the display panel driving circuit 130 and the light modulation panel driving circuit 140 through two connection circuits (not shown in the figure). The display panel driving circuit 130 and the light modulation panel driving circuit 140 are used to drive the display panel 112 and the light modulation panel 114, so that the display screen 110 achieves the expected display effect.

[0281] In some examples, the processor 124 can further include a gray scale conversion circuit (not shown in the figure). The gray scale conversion circuit can control the brightness of the display sub-pixels in the display panel 112 and the light modulation sub-pixels in the light modulation panel 114 accurately, so as to realize display of different gray scale values, etc.

[0282] In some examples, FIG. 43 shows a structural schematic diagram of a display device. As shown in FIG. 43, the display panel driving circuit 130 and the light modulation panel driving circuit 140 are not integrated in the control circuit 120.

[0283] The segment adjustment algorithm of the gamma curve segmentation shown in the embodiments of FIG. 11, FIG. 13, FIG. 14, FIG. 15 and FIG. 16 to the display screen can be executed in the DSP of the processor 124. It can also be executed in the display panel driving circuit 130 and the dimming panel driving circuit 140 as shown in FIG. 43, such as by the timing controller (TCON) in the display panel driving circuit 130 and the dimming panel driving circuit 140.

[0284] Exemplarily, the processor 124 can be configured to execute the gamma curve segmentation adjustment algorithm corresponding to the dimming panel 114, and the display panel driving circuit 130 is configured to execute the gamma curve segmentation adjustment algorithm corresponding to the display panel 112.

[0285] Exemplarily, the control circuit 120, the display panel driving circuit 130 and the dimming panel driving circuit 140 in the display device 100 as shown in FIG. 1, FIG. 42 and FIG. 43 can also include a power supply circuit (not shown in the figure).

[0286] In some examples, FIG. 44 shows a back view schematic diagram of a display device 100. As shown in FIG. 44, the display device 100 includes a backlight driving board 150, a processor 124, a display panel driving circuit 130 and a dimming panel driving circuit 140. Wherein, the backlight driving board 150 is used to drive the backlight module 116 as shown in FIG. 2.

[0287] The present disclosure provides a display device, a display method and a storage medium, by adjusting the color mixing algorithm, to realize pure color (such as R, G or B pure color) display, color mixing (such as different proportions of R, G and B) display effect, the same theoretical color and actual color, and to improve the color mixing abnormal problem. At the same time, through the gamma curve segmentation adjustment algorithm, the halo optimization algorithm (such as the expansion algorithm or the filtering algorithm), to improve the ghosting problem of the display device, the darkening problem of the font edge at large viewing angle, and to improve the display quality and effect of the display device.

[0288] Based on the same inventive concept, the present disclosure provides a computer storage medium, which includes computer program code, when the computer program code runs on a computer, makes the computer execute any one of the display methods discussed above. Since the principle of solving problems of the above-mentioned computer storage medium is similar to the display method, the implementation of the above-mentioned computer storage medium can be referred to the implementation of the method, and the repeated parts will not be described here.

[0289] In specific implementation process, the computer storage medium can include: Universal Serial Bus Flash Drive (USB), mobile hard disk, Read-Only Memory (ROM), Random Access Memory (RAM), magnetic disk or optical disk and various storage media that can store program codes.

[0290] Based on the same inventive concept, the embodiments of the present disclosure further provide a computer program product, which comprises computer program codes, and when the computer program codes run on a computer, the computer is caused to execute the display method as any one of the foregoing. Since the principle of the computer program product for solving the problem is similar to the display method, the implementation of the computer program product can be referred to the implementation of the method, and the repeated parts will not be described here.

[0291] The computer program product can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium may, for example, be but is not limited to an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination of the above. More specific examples (non-exhaustive list) of the readable storage medium include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0292] Those skilled in the art should understand that the embodiments of the present disclosure can be provided as a method, a system, or a computer program product. Therefore, the present disclosure can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present disclosure can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program codes.

[0293] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0294] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks.

[0295] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0296] Obviously, numerous modifications and variations of the present disclosure are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the present disclosure can be practiced otherwise than as specifically described.

Claims

1. A display device, wherein, The display device comprises a display panel and a light modulation panel arranged in a stack, the light modulation panel being configured to backlight modulate the display panel; The display panel comprises adjacent first and second display areas, the first display area having a gray scale value greater than that of the second display area; The light modulation panel comprises adjacent first and second light modulation areas, the first light modulation area being configured to modulate the picture of the first display area, and the second light modulation area being configured to modulate the picture of the second display area; The gray scale value of the first light modulation area is less than or equal to that of the first display area, and the gray scale value of the second light modulation area is less than that of the first light modulation area and greater than that of the second display area.

2. The display device of claim 1, wherein, The first and second light modulation areas each comprise a plurality of sub-light modulation areas arranged repeatedly along a first direction and a second direction, the first direction being perpendicular to the second direction; From the center of the first light modulation area, the gray scale values of the sub-light modulation areas arranged along the first direction in the first and second light modulation areas decrease, and the gray scale value difference between any two sub-light modulation areas with decreasing gray scale values is greater than a first threshold value. And / or, From the center of the first light modulation area, the gray scale values of the sub-light modulation areas arranged along the second direction in the first and second light modulation areas decrease, and the gray scale value difference between any two sub-light modulation areas with decreasing gray scale values is greater than a first threshold value.

3. The display device of claim 1, wherein, The first and second light modulation areas each comprise a plurality of sub-light modulation areas arranged repeatedly along a first direction and a second direction, the first direction being perpendicular to the second direction; From the center of the first light modulation area, the gray scale values of the sub-light modulation areas arranged along the first direction in the first and second light modulation areas decrease, and the gray scale value difference between any two sub-light modulation areas with decreasing gray scale values is greater than a first threshold value. From the center of the first light modulation area, the gray scale value difference between any two sub-light modulation areas arranged along the second direction in the first and second light modulation areas is less than a second threshold value.

4. The display device of claim 1, wherein, The first and second light modulation areas each comprise a plurality of sub-light modulation areas arranged repeatedly along a first direction and a second direction, the first direction being perpendicular to the second direction; From the center of the first light modulation area, the gray scale values of the sub-light modulation areas arranged along the first direction, the opposite direction of the first direction, the second direction and the opposite direction of the second direction in the first and second light modulation areas decrease, and the gray scale value difference between any two light modulation areas with decreasing gray scale values is greater than a first threshold value.

5. The display device of claim 1, wherein, The first and second light modulation areas each comprise a plurality of sub-light modulation areas arranged repeatedly along a first direction and a second direction, the first direction being perpendicular to the second direction; The gray scale values of the sub-light modulation areas in the first and second light modulation areas are axially symmetric about a preset straight line, the preset straight line passing through the center of the first light modulation area and being parallel to the first direction or parallel to the second direction.

6. The display device according to any of claims 2-5, wherein, The gray scale values of the sub-light modulation areas in the first and second light modulation areas are centrally symmetric about the center of the first light modulation area.

7. The display device of claim 1, wherein, The first light-adjusting area and the second light-adjusting area each include a plurality of sub light-adjusting areas arranged repeatedly along a first direction and a second direction, the first direction being perpendicular to the second direction; A first sub light-adjusting area is included in the sub light-adjusting areas in the first light-adjusting area or the second light-adjusting area, a direction in which a center of the first light-adjusting area points to a center of the first sub light-adjusting area being parallel to the first direction; From the center of the first sub light-adjusting area, the gray scale values of the sub light-adjusting areas arranged along the second direction or the opposite direction of the second direction in the first light-adjusting area or the second light-adjusting area decrease, and a difference between the gray scale values of any two sub light-adjusting areas with decreasing gray scale values is greater than a first threshold value.

8. The display device of claim 7, wherein, A second sub light-adjusting area is included in the sub light-adjusting areas in the first light-adjusting area or the second light-adjusting area, a direction in which a center of the first light-adjusting area points to a center of the second sub light-adjusting area being parallel to the second direction; From the center of the second sub light-adjusting area, the gray scale values of the sub light-adjusting areas arranged along the first direction or the opposite direction of the first direction in the first light-adjusting area or the second light-adjusting area decrease, and a difference between the gray scale values of any two sub light-adjusting areas with decreasing gray scale values is greater than a first threshold value.

9. The display device of claim 1, wherein, The first light-adjusting area and the second light-adjusting area each include a plurality of sub light-adjusting areas, and the gray scale values of the sub light-adjusting areas arranged along a first direction in the plurality of sub light-adjusting areas decrease; the first direction being any direction in which a center of the first light-adjusting area points to a boundary of the first light-adjusting area.

10. The display device of claim 1, wherein, The gray scale value of the first display area is greater than a first gray scale threshold value, and the gray scale value of the second display area is less than a second gray scale threshold value.

11. The display device of claim 10, wherein, The first gray scale threshold value is greater than 85 and less than 255, and the second gray scale threshold value is less than 21.

12. The display device of claim 1, wherein, The first display area and the second display area each include a plurality of sub display areas; the first light-adjusting area and the second light-adjusting area each include a plurality of sub light-adjusting areas; One of the plurality of sub display areas corresponds to one of the plurality of sub light-adjusting areas; Each of the sub display areas includes at least one display pixel unit, and each of the sub light-adjusting areas includes at least one light-adjusting pixel unit; the display pixel unit includes three display sub-pixels; the light-adjusting pixel unit includes at least one light-adjusting sub-pixel; one light-adjusting pixel unit corresponds to at least one display pixel unit.

13. The display device of claim 12, wherein, The three display sub-pixels include a red display sub-pixel, a green display sub-pixel, and a blue display sub-pixel.

14. The display device of claim 1, wherein, The light-adjusting panel has a first luminance curve used to represent a mapping relationship between different gray scale values and luminance in the light-adjusting panel; the display panel has a second luminance curve used to represent a mapping relationship between different gray scale values and luminance in the display panel; The first luminance curve includes a plurality of continuous sub-luminance curves, and the gamma values corresponding to each of the sub-luminance curves are different; the second luminance curve includes a plurality of continuous sub-luminance curves, and the gamma values corresponding to each of the sub-luminance curves are different.

15. The display device of claim 14, wherein, The plurality of continuous sub-luminance curves in the first luminance curve correspond to a plurality of continuous gray scale intervals, and each of the sub-luminance curves corresponds to one of the gray scale intervals. The first sub-luminance curve corresponds to a first gray scale interval, and the second sub-luminance curve corresponds to a second gray scale interval, and a gamma value corresponding to the first sub-luminance curve is greater than a gamma value corresponding to the second sub-luminance curve. The first sub-luminance curve and the second sub-luminance curve are any two continuous sub-luminance curves in the multiple sub-luminance curves of the first luminance curve, the first gray scale interval and the second gray scale interval are continuous, and a maximum gray scale value of the first gray scale interval is less than a minimum gray scale value of the second gray scale interval.

16. The display device of claim 14, wherein, The first luminance curve includes a first sub-luminance curve and a second sub-luminance curve, and the second luminance curve includes a third sub-luminance curve and a fourth sub-luminance curve; the first sub-luminance curve corresponds to a first gamma value, the second sub-luminance curve corresponds to a second gamma value, the third sub-luminance curve corresponds to a third gamma value, and the fourth sub-luminance curve corresponds to a fourth gamma value; The sum of the first gamma value and the third gamma value is equal to the sum of the second gamma value and the fourth gamma value; the first sub-luminance curve and the third sub-luminance curve both correspond to a first gray scale interval, the second sub-luminance curve and the fourth sub-luminance curve both correspond to a second gray scale interval, the first gray scale interval and the second gray scale interval are continuous, and a maximum gray scale value of the first gray scale interval is less than a minimum gray scale value of the second gray scale interval.

17. The display device of claim 16, wherein, The maximum gray scale value of the first gray scale interval is less than or equal to 127.

18. The display device of claim 16, wherein, The minimum gray scale value of the second gray scale interval is greater than 85 and less than 255.

19. The display device of claim 16, wherein, The gamma value corresponding to the second sub-luminance curve is zero.

20. A display device, wherein, The display device includes a display panel and a dimming panel arranged in layers, and the dimming panel is configured to modulate the backlight of the display panel; The dimming panel has a first luminance curve for characterizing the mapping relationship between different gray scale values and luminance in the dimming panel, and the display panel has a second luminance curve for characterizing the mapping relationship between different gray scale values and luminance in the display panel; The first luminance curve includes continuous multiple sub-luminance curves, and the gamma values corresponding to each sub-luminance curve are different; the second luminance curve includes continuous multiple sub-luminance curves, and the gamma values corresponding to each sub-luminance curve are different.

21. The display device of claim 20, wherein, The continuous multiple sub-luminance curves in the first luminance curve correspond to continuous multiple gray scale intervals, and each sub-luminance curve corresponds to a gray scale interval; The first sub-luminance curve corresponds to a first gray scale interval, and the second sub-luminance curve corresponds to a second gray scale interval, and a gamma value corresponding to the first sub-luminance curve is greater than a gamma value corresponding to the second sub-luminance curve. The first sub-luminance curve and the second sub-luminance curve are any two continuous sub-luminance curves in the multiple sub-luminance curves of the first luminance curve, the first gray scale interval and the second gray scale interval are continuous, and a maximum gray scale value of the first gray scale interval is less than a minimum gray scale value of the second gray scale interval.

22. The display device of claim 20, wherein, The first luminance curve comprises a first sub-luminance curve and a second sub-luminance curve, and the second luminance curve comprises a third sub-luminance curve and a fourth sub-luminance curve; the first sub-luminance curve corresponds to a first gamma value, the second sub-luminance curve corresponds to a second gamma value, the third sub-luminance curve corresponds to a third gamma value, and the fourth sub-luminance curve corresponds to a fourth gamma value; The sum of the first gamma value and the third gamma value is equal to the sum of the second gamma value and the fourth gamma value; the first sub-luminance curve and the third sub-luminance curve correspond to a first gray scale interval, the second sub-luminance curve and the fourth sub-luminance curve correspond to a second gray scale interval, the first gray scale interval and the second gray scale interval are continuous, and the maximum gray scale value of the first gray scale interval is less than the minimum gray scale value of the second gray scale interval.

23. A display device, wherein, The display device comprises a display panel and a dimming panel configured to backlight modulate the display panel; the display panel comprises a plurality of display pixel units, a first display pixel unit being any one of the plurality of display pixel units, the first display pixel unit comprising a first display sub-pixel, a second display sub-pixel and a third display sub-pixel; the dimming panel comprises a plurality of dimming pixel units; a first dimming pixel unit being any one of the plurality of dimming pixel units; the first dimming pixel unit is configured to backlight modulate the first display pixel unit; The display gray scale value of the first display sub-pixel is equal to a first gray scale value, the display gray scale value of the second display sub-pixel is less than a second gray scale value, and the display gray scale value of the third display sub-pixel is less than a third gray scale value; the gray scale value of the first dimming pixel unit is equal to the first gray scale value; The first gray scale value, the second gray scale value and the third gray scale value are the first gray scale value corresponding to the first display sub-pixel, the second gray scale value corresponding to the second display sub-pixel and the third gray scale value corresponding to the third display sub-pixel in the input display gray scale value of the display device, the first gray scale value is greater than the second gray scale value, and the second gray scale value is greater than the third gray scale value.

24. The display device of claim 23, wherein, The first gray scale value, the second gray scale value and the display gray scale value of the second display sub-pixel have the following correlation: The first gray scale value, the third gray scale value and the display gray scale value of the third display sub-pixel have the following correlation: Wherein, α represents the gamma value of the first luminance curve; β represents the gamma value of the second luminance curve; the first luminance curve is used to represent the mapping relationship between different gray scale values and luminance in the dimming panel; the second luminance curve is used to represent the mapping relationship between different gray scale values and luminance in the display panel.

25. The display device of claim 23, wherein, The dimming panel has a first luminance curve, and the first luminance curve is used to represent the mapping relationship between different gray scale values and luminance in the dimming panel; the display panel has a second luminance curve, and the second luminance curve is used to represent the mapping relationship between different gray scale values and luminance in the display panel; The first luminance curve comprises a plurality of continuous sub-luminance curves, and each sub-luminance curve corresponds to a different gamma value; the second luminance curve comprises a plurality of continuous sub-luminance curves, and each sub-luminance curve corresponds to a different gamma value.

26. The display device of claim 25, wherein, The first luminance curve comprises a first sub-luminance curve and a second sub-luminance curve, and the second luminance curve comprises a third sub-luminance curve and a fourth sub-luminance curve; the first sub-luminance curve corresponds to a first gamma value, the second sub-luminance curve corresponds to a second gamma value, the third sub-luminance curve corresponds to a third gamma value, and the fourth sub-luminance curve corresponds to a fourth gamma value; The sum of the first gamma value and the third gamma value is equal to the sum of the second gamma value and the fourth gamma value; the first sub-luminance curve and the third sub-luminance curve correspond to a first gray scale interval, the second sub-luminance curve and the fourth sub-luminance curve correspond to a second gray scale interval, the first gray scale interval and the second gray scale interval are continuous, and the maximum gray scale value of the first gray scale interval is less than the minimum gray scale value of the second gray scale interval.

27. The display device of claim 26, wherein, When the first gray scale value belongs to the first gray scale interval, the first gray scale value, the second gray scale value and the display gray scale value of the second display sub-pixel have the following correlation: The first gray scale value, the third gray scale value and the display gray scale value of the third display sub-pixel have the following correlation: When the first gray scale value belongs to the second gray scale interval, there is a correlation between the maximum gray scale value of the first gray scale interval, the second gray scale value and the display gray scale value of the second display sub-pixel as follows: The maximum gray scale value of the first gray scale interval, the third gray scale value, and the display gray scale value of the third display sub-pixel have the following relationship: In the formula, α represents the gamma value of the first sub-luminance curve, and β represents the gamma value of the third sub-luminance curve.

28. A display method, wherein, The display method is applied to a display device, and the display device comprises a display panel and a dimming panel. A to-be-displayed gray scale value is obtained. A display gray scale value of the display panel and the dimming panel is determined according to the to-be-displayed gray scale value, a first luminance curve and a second luminance curve. The first luminance curve is used to represent the mapping relationship between different gray scale values and luminance in the dimming panel, and the second luminance curve is used to represent the mapping relationship between different gray scale values and luminance in the display panel. The first luminance curve comprises continuous multiple sub-luminance curves, and the gamma values corresponding to the multiple sub-luminance curves are different; and the second luminance curve comprises continuous multiple sub-luminance curves, and the gamma values corresponding to the multiple sub-luminance curves are different.

29. A display method, wherein, The display method is applied to a display device, and the display device comprises a display panel and a dimming panel. A gray scale value corresponding to a first display area and a gray scale value corresponding to a second display area are obtained from a to-be-displayed gray scale value; the gray scale value corresponding to the first display area is greater than the gray scale value of the second display area; the first display area and the second display area are adjacent in the display panel. A gray scale value of a first dimming area and a gray scale value of a second dimming area are obtained according to the gray scale value corresponding to the first display area and the gray scale value of the second display area; the first dimming area and the second dimming area are adjacent in the dimming panel; the first dimming area is used for dimming a picture of the first display area, and the second dimming area is used for dimming a picture of the second display area; The gray scale value of the first dimming area is less than or equal to the gray scale value of the first display area; and the gray scale value of the second dimming area is less than the gray scale value of the first dimming area and greater than the gray scale value of the second display area.

30. A display method, wherein, The application is applied to a display device, the display device comprising a display panel and a light modulation panel configured to backlight modulate the display panel; the display panel comprising a plurality of display pixel units, a first display pixel unit being any one of the plurality of display pixel units, the first display pixel unit comprising a first display sub-pixel, a second display sub-pixel and a third display sub-pixel; the light modulation panel comprising a plurality of light modulation pixel units, a first light modulation pixel unit being any one of the plurality of light modulation pixel units; the first light modulation pixel unit is configured to backlight modulate the first display pixel unit; the display method comprising: obtaining a first gray scale value corresponding to the first display sub-pixel, a second gray scale value corresponding to the second display sub-pixel and a third gray scale value corresponding to the third display sub-pixel in a to-be-displayed gray scale value; the first gray scale value is greater than the second gray scale value, and the second gray scale value is greater than the third gray scale value; obtaining a display gray scale value of the first display sub-pixel, a display gray scale value of the second display sub-pixel, a display gray scale value of the third display sub-pixel and a display gray scale value of the first light modulation pixel unit according to the first gray scale value, the second gray scale value and the third gray scale value; wherein the display gray scale value of the first display sub-pixel is equal to the first gray scale value, the display gray scale value of the second display sub-pixel is less than the second gray scale value, the display gray scale value of the third display sub-pixel is less than the third gray scale value; and the gray scale value of the first light modulation pixel unit is equal to the first gray scale value.

31. The display method according to claim 30, wherein The light modulation panel has a first luminance curve for characterizing the mapping relationship between different gray scale values and luminance in the light modulation panel; the display panel has a second luminance curve for characterizing the mapping relationship between different gray scale values and luminance in the display panel; the first luminance curve comprises a first segment sub-luminance curve and a second segment sub-luminance curve; the second luminance curve comprises a third segment sub-luminance curve and a fourth segment sub-luminance curve; the first segment sub-luminance curve corresponds to a first gamma value, the second segment sub-luminance curve corresponds to a second gamma value, the third segment sub-luminance curve corresponds to a third gamma value, and the fourth segment sub-luminance curve corresponds to a fourth gamma value; the sum of the first gamma value and the third gamma value is equal to the sum of the second gamma value and the fourth gamma value; the first segment sub-luminance curve and the third segment sub-luminance curve both correspond to a first gray scale interval, the second segment sub-luminance curve and the fourth segment sub-luminance curve both correspond to a second gray scale interval, the first gray scale interval and the second gray scale interval are continuous, and the maximum gray scale value of the first gray scale interval is less than the minimum gray scale value of the second gray scale interval; the first gray scale value, the second gray scale value and the third gray scale value, comprises: When the first gray scale value is less than a preset threshold value, display gray scale values of the first display sub-pixel, the second display sub-pixel, the third display sub-pixel and the first dimming pixel unit are obtained according to the first gray scale value, the second gray scale value, the third gray scale value, a gamma value of the first sub-luminance curve and a gamma value of the third sub-luminance curve; When the first gray scale value is greater than the preset threshold value, display gray scale values of the first display sub-pixel, the second display sub-pixel, the third display sub-pixel and the first dimming pixel unit are obtained according to the preset threshold value, the first gray scale value, the second gray scale value, the third gray scale value, a gamma value of the first sub-luminance curve and a gamma value of the third sub-luminance curve; The preset threshold value is a maximum gray scale value of the first gray scale interval or a minimum gray scale value of the second gray scale interval.

32. A computer storage medium having stored thereon a computer program, wherein, The program, when executed by a processor, implements the steps of the method of claim 28, and / or, when executed by a processor, implements the steps of the method of claim 29, and / or, when executed by a processor, implements the steps of the method of any one of claims 30-31.

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