Display device and method for improving display effect

Abstract

A display device and a method for improving a display effect, which improve the display effect of a display screen (200) at a large viewing angle. The display device comprises a display screen (200) and a control circuit (201), wherein the display screen (200) comprises a first display panel and a second display panel; the control circuit (201) comprises a processor and a memory, the memory being configured for storing a program executable by the processor, and the processor being configured for reading the program in the memory and executing the following steps: according to a first pixel illuminated on the first display panel, determining a second pixel on the second display panel that has an orthographic projection overlapping with an orthographic projection of the first pixel on the second display panel (1800); determining a position of the second pixel as being within a luminance region, and determining a position of a pixel adjacent to the second pixel as being within an expanded region (1801); luminance of the expanded region is less than luminance of the luminance region (1802).

Description

Display device and method for improving display effect TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular to a display device and a method for improving display effect. BACKGROUND

[0002] With the development of liquid crystal display technology, people have higher and higher requirements on the imaging quality of display, especially on the display black color. Through the application of different technologies, panel manufacturers can achieve higher and higher contrast ratio, thereby reducing the brightness of L0 picture (black picture) and realizing excellent black color of terminal.

[0003] At present, the scheme for achieving ultra-low brightness of L0 picture mainly includes a negative liquid crystal scheme, but this scheme usually causes slow response time, which affects the user's image effect experience.

[0004] SUMMARY

[0005] The present disclosure provides a display device and a method for improving display effect, which are used for improving the display effect of a display screen under a large viewing angle and solving the problem of display in dark or halo under a normal viewing angle.

[0006] In a first aspect, the present disclosure provides a display device, which comprises a display screen and a control circuit, wherein:

[0007] The display screen comprises a first display panel and a second display panel, the first display panel and the second display panel are arranged in layers, one pixel unit in the first display panel corresponds to one pixel unit in the second display panel, the first display panel is used for picture display, and the second display panel is used for picture dimming.

[0008] The control circuit comprises a processor and a memory, the memory is used for storing a program executable by the processor, and the processor is used for reading the program in the memory and performing the following steps:

[0009] According to a first pixel lit in the first display panel, a second pixel in the second display panel is determined, which overlaps the orthographic projection of the first pixel on the second display panel; the first pixel comprises at least one pixel unit.

[0010] The position of the second pixel is determined as a brightness area, and the position of the adjacent pixel of the second pixel is determined as an inflation area; wherein the brightness of the inflation area is less than the brightness of the brightness area.

[0011] In a second aspect, the embodiments of the present disclosure provide a method for improving display effect, applied to a display screen, the display screen comprising a first display panel and a second display panel; one pixel unit in the first display panel corresponding to one pixel unit in the second display panel; the method comprising:

[0012] determining, according to a first pixel lit in the first display panel, a second pixel in the second display panel overlapping with a front projection of the first pixel on the second display panel; the first pixel comprising at least one pixel unit;

[0013] determining a position of the second pixel as a brightness area and a position of a neighboring pixel of the second pixel as an expansion area;

[0014] adjusting light of a picture of the first display panel according to brightness changes of the brightness area and the expansion area, wherein brightness of the expansion area is less than brightness of the brightness area.

[0015] In a third aspect, the embodiments of the present disclosure further provide a device for improving display effect, the device comprising:

[0016] a determination module, configured to determine, according to a first pixel lit in the first display panel, a second pixel in the second display panel overlapping with a front projection of the first pixel on the second display panel; the first pixel comprising at least one pixel unit;

[0017] a determination module, configured to determine a position of the second pixel as a brightness area and a position of a neighboring pixel of the second pixel as an expansion area;

[0018] a brightness control module, configured to adjust light of a picture of the first display panel according to brightness changes of the brightness area and the expansion area, wherein brightness of the expansion area is less than brightness of the brightness area.

[0019] In a fourth aspect, the embodiments of the present disclosure further provide a computer storage medium, having a computer program stored thereon, the program being executed by a processor to implement steps of the method in any one of the second aspect.

[0020] In a fifth aspect, the present disclosure provides a computer program product, comprising: computer program code, when the computer program code is run on a computer, causing the computer to execute the method in any one of the second aspect.

[0021] These and other aspects of the present disclosure will become more apparent from the following detailed description of the embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0023] FIG. 1A-FIG. 1B are schematic diagrams of display screen darkening or disappearing under large viewing angle according to an embodiment of the present disclosure;

[0024] FIG. 2 is a schematic diagram of a display device according to an embodiment of the present disclosure;

[0025] FIG. 3A-FIG. 3B are schematic diagrams of layering setting structure of a display screen according to an embodiment of the present disclosure;

[0026] FIG. 4A-FIG. 4B are schematic diagrams of luminance decay curve of a display screen according to an embodiment of the present disclosure;

[0027] FIG. 5A-FIG. 5B are schematic diagrams of different display panel part sub-pixels of a display screen according to an embodiment of the present disclosure;

[0028] FIG. 6 is a schematic diagram of a cross section of a luminance adjusting display screen according to an embodiment of the present disclosure;

[0029] FIG. 7A-FIG. 7C are schematic diagrams of pixel luminance adjustment at different positions according to an embodiment of the present disclosure;

[0030] FIG. 8 is a schematic diagram of display screen luminance improvement under large viewing angle according to an embodiment of the present disclosure;

[0031] FIG. 9 is a schematic diagram of second display panel luminance adjustment according to an embodiment of the present disclosure;

[0032] FIG. 10 is a schematic diagram of second display panel luminance adjustment according to an embodiment of the present disclosure;

[0033] FIG. 11 is a schematic diagram of eye position detection according to an embodiment of the present disclosure;

[0034] FIG. 12 is a schematic diagram of inflation algorithm according to an embodiment of the present disclosure;

[0035] FIG. 13A-FIG. 13C are schematic diagrams of inflation algorithm according to an embodiment of the present disclosure;

[0036] FIG. 14 is a schematic diagram of inflation algorithm according to an embodiment of the present disclosure;

[0037] FIG. 15A-FIG. 15C are schematic diagrams of inflation algorithm according to an embodiment of the present disclosure;

[0038] FIG. 16 is a schematic diagram of determining the number of extended pixels according to an embodiment of the present disclosure;

[0039] FIGS. 17A-17B are schematic diagrams of setting the luminance of the expansion area according to an embodiment of the present disclosure;

[0040] FIG. 18 is a flowchart of a method for improving display effect according to an embodiment of the present disclosure;

[0041] FIG. 19 is a schematic diagram of an apparatus for improving display effect according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0042] 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.

[0043] In the embodiments of the present disclosure, the term "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.

[0044] 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.

[0045] Before introducing the display device and the method for improving display effect 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.

[0046] With the development of liquid crystal display technology, people's requirements for the imaging quality of display are getting higher and higher, especially the requirements for the display black base are getting more and more strict. Through the application of different technologies, panel factories can achieve higher and higher contrast ratio, thereby reducing the brightness of L0 picture (black picture) of the product, and realizing excellent black base of the terminal. At present, the schemes for achieving ultra-low brightness of L0 picture mainly include negative liquid crystal scheme, but this scheme usually causes slow response time, which affects the user's image effect experience.

[0047] As shown in FIGS. 1A-1B, the present embodiment also provides a schematic diagram of the display picture becoming dark or disappearing under a large viewing angle. As shown in FIG. 1A, when a user views the pixels lit up on the first display panel under a large viewing angle, the corresponding pixels of the second display panel are not lit up, thus causing the display picture to be darker under a large viewing angle than under a normal viewing angle. As shown in FIG. 1B, when the display screen is viewed under a horizontal large viewing angle, the vertical lines in the display picture are darkened.

[0048] In order to improve the display effect for the user, the present embodiment provides a display device and a method for improving the display effect. The core idea is to stack the double-layer display panels, to adjust the light of the picture displayed in the first display panel by the second display panel, so as to achieve a contrast ratio of more than 10,000, and to solve the problems of the darkening, disappearance and halo of the picture under a large viewing angle by setting the brightness of the expansion area to be less than the brightness of the brightness area.

[0049] As shown in FIG. 2, the display device provided by the present embodiment includes a display screen 200 and a control circuit 201, wherein:

[0050] The display screen 200 includes a first display panel and a second display panel, the first display panel and the second display panel are stacked, one pixel unit in the first display panel corresponds to one pixel unit in the second display panel, the first display panel is used for picture display, and the second display panel is used for picture light adjustment.

[0051] The control circuit 201 includes a processor and a memory, the memory is used to store programs executable by the processor, and the processor is used to read the programs in the memory and perform the following steps:

[0052] a) determining the second pixels in the second display panel that overlap with the normal projection of the first pixels on the second display panel according to the first pixels lit up in the first display panel; the first pixels include at least one pixel unit;

[0053] In the implementation, the first display panel and the second display panel in the present embodiment are stacked, the pixel units in the first display panel and the pixel units in the second display panel are one-to-one corresponding, the number of the pixel units in the first display panel and the second display panel is the same, and the size of the pixel units is the same. The number of the sub-pixels contained in the pixel units of the first display panel and the number of the sub-pixels contained in the pixel units of the second display panel can be the same or different.

[0054] Optionally, the pixel unit in the embodiment includes one or more sub-pixels, wherein one pixel unit of the first display panel includes three sub-pixels, which are R sub-pixel, G sub-pixel and B sub-pixel respectively, and one pixel unit of the second display panel includes at least one sub-pixel.

[0055] Optionally, the first pixel in the embodiment includes one or more pixel units in the first display panel, and the second pixel in the embodiment includes one or more pixel units in the second display panel.

[0056] When the first display panel displays a picture, the first pixel in the first display panel is determined to be lighted, wherein the first pixel includes at least one pixel unit of the first display panel; the first pixel can be a pixel area formed by a plurality of lighted pixels, the second pixel includes at least one pixel unit of the second display panel; the positions of the second pixel and the first pixel are corresponding, the orthographic projection of the second pixel on the second display panel is overlapped with the first pixel, the position of the first pixel in the first display panel is the same as the position of the second pixel in the second display panel, for example, the first pixel is in the center of the first display panel, and the second pixel is in the center of the second display panel.

[0057] b) determining the position of the second pixel as a brightness area and the position of the adjacent pixel of the second pixel as an expansion area; wherein the brightness of the expansion area is less than the brightness of the brightness area.

[0058] In the implementation, on the second display panel, the area formed by the second pixel is determined as a brightness area, and the adjacent area of the brightness area is determined as an expansion area. Optionally, the expansion area surrounds the brightness area, or the expansion area semi-surrounds the brightness area, or the expansion area surrounds at least part of the brightness area.

[0059] Optionally, according to the brightness change of the brightness area and the expansion area, the picture of the first display panel is dimmed.

[0060] In the implementation, since the brightness area is opposite to the lighted pixel unit on the first display panel, by adjusting the brightness of the brightness area and the brightness of the expansion area, the brightness of the expansion area is controlled to be less than the brightness of the brightness area, so as to solve the problem that the displayed picture is darkened under large viewing angle.

[0061] In some embodiments, the display screen in the embodiment includes a first display panel and a second display panel, and an optical diffusion material is arranged between the first display panel and the second display panel; the first display panel and the second display panel are formed by optical bonding; or the first display panel and the second display panel are formed by frame bonding.

[0062] In some embodiments, the first display panel and the second display panel are attached by a frame attachment method, a bonding material is arranged between the frames of the first display panel and the second display panel, the bonding material is used to attach the frames of the first display panel and the second display panel, and an area other than the frames of the first display panel and the second display panel is isolated.

[0063] In some embodiments, the backlight source of the display screen is provided with a single prism; or, the backlight source of the display screen is not provided with a prism.

[0064] In some embodiments, the display screen in the present embodiment includes a first display panel and a second display panel, an optical diffusion material is arranged between the first display panel and the second display panel by a laminated arrangement, and the two display panels are attached together by optical attachment or frame attachment, and the alignment accuracy of the position of each pixel unit from top to bottom is within ±80 μm.

[0065] As shown in FIGS. 3A-3B, the present embodiment provides a schematic diagram of a laminated arrangement structure of a display screen. Referring to FIG. 3A, the first display panel and the second display panel are attached by a frame attachment method, and from top to bottom, they are a first display panel, an optical diffusion material, a frame-attached foam, a second display panel, and a BLU (Backlight Unit). The frame-attached foam is attached to the frame, and there is an air layer between the first display panel and the second display panel. The display screen from top to bottom is a first display panel, an optical diffusion material, a second display panel, and a BLU (Backlight Unit). The first display panel from top to bottom is provided with a POL (polarizer), a CF (color filter) glass, a TFT (Thin Film Transistor) glass, and a POL. The second display panel from top to bottom is provided with a POL, a CF glass, a TFT glass, and a POL. The BLU includes a DBEF (Double Brightness Enhancing Film), a PRISM 0° (prism), and a lower diffusion sheet; or, the BLU includes a DBEF and two diffusion sheets.

[0066] Referring to FIG. 3B, the first display panel and the second display panel are attached by an optical attachment method, and an optical diffusion material and an optical adhesive layer are arranged between the first display panel and the second display panel. The first display panel from top to bottom is provided with a POL, a CF glass, a TFT glass, and a POL. The second display panel from top to bottom is provided with a POL, a CF glass, a TFT glass, and a POL. The BLU includes a DBEF, a PRISM 0° (prism), and a lower diffusion sheet; or, the BLU includes a DBEF and two diffusion sheets.

[0067] As shown in FIGS. 4A-4B, the embodiment also provides a schematic diagram of luminance decay curves of display pictures under horizontal and vertical viewing angles in the case of the backlight source including the double prism and the single prism. Referring to FIG. 4A, the horizontal axis represents the horizontal viewing angle, and the vertical axis represents the normalized luminance value. Referring to FIG. 4B, the horizontal axis represents the vertical viewing angle, and the vertical axis represents the normalized luminance value. It can be seen that, compared with the case of the backlight source including the double prism with luminance decay of 45°, the luminance under the horizontal and vertical viewing angles can be improved in the case of the backlight source including the single prism.

[0068] In the implementation, in order to optimize the picture luminance under a large viewing angle, the backlight source of the display device can adopt a design of the single prism or no prism, and meanwhile, optical diffusion material is added between the first display panel and the second display panel, and the two are attached together through optical attachment or frame attachment, so as to achieve the effect of slow luminance decay under a large viewing angle.

[0069] In some embodiments, the pixel units of the first display panel and the second display panel in the embodiment are one-to-one corresponding, the pixel unit of the first display panel includes three sub-pixels, and the three sub-pixels are an R sub-pixel, a G sub-pixel and a B sub-pixel respectively; and the pixel unit of the second display panel includes at least one sub-pixel.

[0070] As shown in FIGS. 5A-5B, the embodiment provides a schematic diagram of different display panel partial pixels of a display screen. Referring to FIG. 5A, the sub-pixels contained in the pixel units of the first display panel and the second display panel are in a 1:1 case, the sizes of the sub-pixels in the first display panel and the second display panel are the same, each pixel unit of the first display panel includes an R (red) sub-pixel, a G (green) sub-pixel and a B (blue) sub-pixel, which are used for color picture display, and each pixel unit of the second display panel includes three sub-pixels, which are used for adjusting the luminance of the pixels in the first display panel through different gray scales. Referring to FIG. 5B, the pixel units of the first display panel and the second display panel are one-to-one corresponding, and the ratio of the sub-pixels of the first display panel and the second display panel is 3:2. As can be seen under a microscope, each pixel unit of the first display panel includes three sub-pixels, and each pixel unit of the second display panel includes two sub-pixels.

[0071] In the implementation, when the sub-pixels contained in each pixel unit of the first display panel and the second display panel are 1:1, there will be a problem of picture darkening or disappearance when observed under a large viewing angle. In view of this problem, the embodiment can solve the problem of picture darkening or disappearance when observed under a large viewing angle by setting an inflation area.

[0072] In some embodiments, the size of the expansion region in the present embodiment is determined by extending outwardly at least one pixel unit from the boundary of the brightness region in the direction pointing from the center of the brightness region to the boundary of the brightness region.

[0073] In some embodiments, as shown in FIG. 6, the present embodiment provides a schematic diagram of a cross section of a brightness-adjusted display screen. When a first pixel on the first display panel is lit, a second pixel in the second display panel at the same position as the lit first pixel is taken as a brightness region, and then a plurality of pixel units are extended outwardly from the brightness region to obtain an expansion region. Due to the brightness adjustment of the expansion region, the problem of the first pixel becoming dark at a large viewing angle can be improved. Moreover, since the brightness of the expansion region is less than that of the brightness region, the problem of halo at a normal viewing angle can be improved.

[0074] As shown in FIGS. 7A-7C, the present embodiment provides a schematic diagram of brightness adjustment of pixels at different positions. Referring to FIG. 7A, the first pixel on the first display panel is located at the center of the first display panel, and the second pixel is determined to be located at the center of the second display panel. The second pixel is taken as a brightness region, and then a plurality of pixel units are extended outwardly from the brightness region to obtain an expansion region. At this time, the expansion region surrounds the brightness region. Referring to FIG. 7B, the first pixel on the first display panel is located at the upper edge of the first display panel, and the second pixel is determined to be located at the upper edge of the second display panel. The second pixel is taken as a brightness region, and then a plurality of pixel units are extended outwardly from the brightness region to obtain an expansion region. At this time, the expansion region half-surrounds the brightness region. Referring to FIG. 7C, the first pixel on the first display panel is located at the upper left corner of the first display panel, and the second pixel is determined to be located at the upper left corner of the second display panel. The second pixel is taken as a brightness region, and then a plurality of pixel units are extended outwardly from the brightness region to obtain an expansion region. At this time, the expansion region half-surrounds the brightness region. Through the setting of the expansion region, the problem of the display screen becoming dark at a large viewing angle can be improved. Moreover, by controlling the brightness of the expansion region to be less than that of the brightness region, the problem of halo of the display screen at a normal viewing angle can be improved. As shown in FIG. 8, the present embodiment provides a schematic diagram of brightness improvement of a display screen at a large viewing angle. It can be seen that the problem of the display screen becoming dark at a large viewing angle can be solved by the setting of the expansion region in the present embodiment. At this time, the brightness of the display screen seen by the user at a large viewing angle is improved, which can effectively improve the user experience.

[0075] In some embodiments, the present embodiment further provides a transition region, and the processor is specifically further configured to perform:

[0076] The position of the adjacent pixel unit on the side of the expansion region away from the brightness region is determined as a transition region. The brightness of the transition region is less than the brightness of the expansion region.

[0077] Optionally, the size of the transition region in the embodiment is determined by expanding at least one pixel unit outward from the boundary of the expansion region in the direction pointing from the center of the brightness region to the boundary of the brightness region.

[0078] As shown in FIG. 9, the embodiment provides a schematic diagram of transition region setting of the second display panel, in which, after determining the brightness region according to the second pixels, the expansion region is set to surround the brightness region, and the transition region is set to surround the expansion region, i.e., the brightness region and the expansion region are adjacent, the expansion region is adjacent to both the brightness region and the transition region, and the transition region is adjacent to the expansion region.

[0079] As shown in FIG. 10, the embodiment also provides a schematic diagram of brightness adjustment of the second display panel, in which, the brightness of the brightness region is set to be maximum, e.g., the second pixels of the brightness region are set to be 100% gray scale value; the brightness of the expansion region is less than that of the brightness region, and the pixels of the expansion region can be set to be 50%-90% gray scale value; the brightness of the transition region is less than that of the expansion region, and the pixels of the transition region can be set to be 5%-10% gray scale value; the brightness decreases in turn in the order of brightness region-expansion region-transition region. In the implementation, the gray scale values of the brightness region, the expansion region and the transition region can be set according to the actual display effect, and the embodiment does not make too many limitations on the setting of the specific gray scale values.

[0080] In the implementation, the transition region is set on the basis of the expansion region, and the brightness of the transition region is controlled to be less than that of the expansion region, so that the brightness decreases in turn in the order of brightness region-expansion region-transition region, which can improve the problem of picture darkening at large viewing angle and better improve the halo problem at normal viewing angle, effectively improve the display effect, and make the display picture seen by the user at any angle achieve good display effect.

[0081] In some embodiments, the embodiment also provides an expansion algorithm, in which, the eye position is captured by a position sensing module of the display device, the expansion algorithm is determined according to the viewing angle range corresponding to the eye position, and the expansion region is determined by using the expansion algorithm.

[0082] Optionally, the position sensing module can be a position sensor such as an infrared sensor, etc., which estimates the viewing angle range of the eye by detecting the position of the person; or can be a camera device which determines the viewing angle range of the eye by detecting the position of the face in the shooting. The embodiment does not make too many limitations on the specific way of determining the eye position.

[0083] In some embodiments, the corresponding expansion algorithm is determined and the expansion region is determined by the following way:

[0084] a) The eye position is detected by the position sensing module to determine the viewing angle range corresponding to the eye position;

[0085] Optionally, the view angle range in the embodiment includes a normal view angle range and a large view angle range.

[0086] The normal view angle range is used to represent that the offset between the eye line of sight and the reference direction is greater than a first threshold value and less than a second threshold value, and the reference direction represents the direction in which the eye line of sight is directly opposite the center of the display screen. Optionally, the normal view angle range refers to the offset between the eye line of sight and the reference direction being between -10° and 10°.

[0087] The large view angle range is used to represent that the offset between the eye line of sight and the reference direction is less than or equal to the first threshold value, or the view angle range represents that the offset between the eye line of sight and the reference direction is greater than or equal to the second threshold value. Optionally, the large view angle range refers to the offset between the eye line of sight and the reference direction being less than or equal to -10°, or the offset being greater than or equal to 10°.

[0088] As shown in FIG. 11, the embodiment provides a schematic diagram of eye position detection. The position sensing module is used to detect the eye position, and the expansion algorithm corresponding to different view angle ranges is determined, so that the display picture effect under different view angles can be improved more intelligently.

[0089] b) determining an expansion area from the adjacent area of the brightness area according to the expansion algorithm corresponding to the view angle range, wherein the expansion algorithm corresponding to different view angle ranges is different.

[0090] Due to the different display effects under the normal view angle and the large view angle, the expansion algorithm under different view angles is set, so that the display problem under different view angles can be improved more intelligently according to different display effects. The expansion algorithm corresponding to the normal view angle and the expansion algorithm corresponding to the large view angle are different in the embodiment.

[0091] The expansion algorithm one is the expansion algorithm corresponding to the normal view angle.

[0092] The normal view angle range refers to the offset between the eye line of sight and the reference direction being greater than the first threshold value and less than the second threshold value, and the expansion algorithm corresponding to the normal view angle is used to determine the expansion area in the following manner:

[0093] In the direction from the center of the brightness area to the boundary of the brightness area, at least part of the boundary of the brightness area is taken as the starting position to expand outward by at most one pixel unit, so as to obtain the expansion area.

[0094] Optionally, the position of at least part of the boundary of the brightness area is determined according to the direction of the eye line of sight, and the point of incidence of the eye line of sight on the second panel is located at the position of at least part of the boundary of the brightness area.

[0095] In the implementation, the expansion of the brightness area is performed along the direction of the eye line. If the eye line is perpendicular to the display screen of the display panel, i.e., the offset between the eye line and the reference direction is 0°, one pixel unit can be expanded from the boundary of the brightness area as the starting position, or the expansion area can not be expanded from the boundary of the brightness area as the starting position, i.e., the expansion area surrounds the brightness area after the expansion of one pixel unit. If the offset between the eye line and the reference direction is not 0° and is between -10° and 10°, the brightness area can be expanded on one side, i.e., one pixel unit is expanded from the partial boundary of the brightness area as the starting position along the direction of the eye line, wherein the partial boundary of the brightness area corresponds to the eye line, for example, if the eye line is directed to the left side of the display panel, one pixel unit is expanded from the left boundary of the brightness area as the starting position; if the eye line is directed to the right side of the display panel, one pixel unit is expanded from the right boundary of the brightness area as the starting position; if the eye line is directed to the upper side of the display panel, one pixel unit is expanded from the upper boundary of the brightness area as the starting position; or if the eye line is directed to the lower side of the display panel, one pixel unit is expanded from the lower boundary of the brightness area as the starting position.

[0096] As shown in FIG. 12, the embodiment provides a schematic diagram of the expansion algorithm. The current eye line is perpendicular to the display screen of the display panel, i.e., the offset between the eye line and the reference direction is 0°, and the user's eye line is directed to the first pixel on the first display panel, so that the brightness area can not be expanded. After the second pixel is determined according to the position of the first pixel, the second pixel is taken as the brightness area, and the brightness of the first pixel is adjusted.

[0097] As shown in FIGS. 13A-13C, the embodiment provides a schematic diagram of the expansion algorithm. The offset between the eye line and the reference direction is not 0° and is between -10° and 10°. As shown in FIG. 13A, if the eye line is directed to the left side of the display panel, one pixel unit is expanded from the left boundary of the brightness area as the starting position. As shown in FIG. 13B, if the eye line is directed to the right side of the display panel, one pixel unit is expanded from the right boundary of the brightness area as the starting position. As shown in FIG. 13C, if the eye line is directed to the upper side of the display panel, one pixel unit is expanded from the upper boundary of the brightness area as the starting position.

[0098] The expansion algorithm II is the expansion algorithm corresponding to the large viewing angle.

[0099] The large viewing angle range refers to the offset between the eye line and the reference direction being less than or equal to a first threshold value or greater than or equal to a second threshold value. The expansion algorithm corresponding to the large viewing angle is used to determine the expansion area in the following manner.

[0100] At least one pixel unit is expanded from the partial boundary of the brightness area as the starting position along the direction from the center of the brightness area to the boundary of the brightness area, so as to obtain the expansion area.

[0101] Optionally, the position of at least part of the boundary of the brightness region is determined according to the direction of the eye line of sight.

[0102] In implementation, the expansion of the brightness region along the direction of the eye line of sight can be one-sided expansion if the offset of the eye line of sight from the reference direction is ≤-10° or the offset of the eye line of sight from the reference direction is ≥10°, and the expansion is outward expansion of one or more pixel units from the starting position of part of the boundary of the brightness region in the direction of the eye line of sight, wherein the part of the boundary of the brightness region corresponds to the eye line of sight, for example, if the eye line of sight is looking to the left of the display screen, the left boundary of the brightness region is the starting position of the outward expansion of at least one pixel unit; if the eye line of sight is looking to the right of the display screen, the right boundary of the brightness region is the starting position of the outward expansion of at least one pixel unit; if the eye line of sight is looking to the top of the display screen, the top boundary of the brightness region is the starting position of the outward expansion of at least one pixel unit; if the eye line of sight is looking to the bottom of the display screen, the bottom boundary of the brightness region is the starting position of the outward expansion of at least one pixel unit.

[0103] As shown in FIG. 14, the present embodiment provides a schematic diagram of an inflation algorithm, the eye line of sight is looking to the left of the display screen, and the offset of the eye line of sight from the reference direction is ≥10°. The user line of sight is looking at the first pixel lit by the first display panel, at this time the user visual angle is in a large visual angle, the second pixel of the second display panel is determined according to the position of the first pixel, a plurality of pixel units are expanded to the left of the second pixel to obtain an inflation region, and the brightness of the inflation region at the position looked at by the line of sight is used to improve the brightness of the first pixel under a large visual angle.

[0104] As shown in FIGS. 15A-15C, the present embodiment provides a schematic diagram of an inflation algorithm, the offset of the eye line of sight from the reference direction is ≤-10° or the offset of the eye line of sight from the reference direction is ≥10°. Referring to FIG. 15A, the eye line of sight is looking to the left of the display screen, at this time the offset of the eye line of sight from the reference direction is greater than 10°, and the left boundary of the brightness region is the starting position of the outward expansion of 3 pixel units; referring to FIG. 15B, the eye line of sight is looking to the right of the display screen, and the right boundary of the brightness region is the starting position of the outward expansion of 3 pixels; referring to FIG. 15C, the eye line of sight is looking to the bottom of the display screen, and the bottom boundary of the brightness region is the starting position of the outward expansion of 3 pixel units.

[0105] In the case where the user looks at the display screen in a large visual angle, at most one pixel unit is outwardly expanded from the starting position of at least part of the boundary of the brightness region in the direction of the center of the brightness region pointing to the boundary of the brightness region to obtain the inflation region. The present embodiment can also determine the size of the specific inflation region according to the offset between the eye line of sight and the reference direction. The present embodiment determines the number of outwardly expanded pixel units by the following steps:

[0106] The number of the outwardly expanding pixel units is determined according to the offset between the eye line of sight and the reference direction, the thickness and the refractive index of the first display panel, the thickness and the refractive index of the second display panel, and the thickness and the refractive index of the medium between the first display panel and the second display panel.

[0107] In some embodiments, the processor is specifically configured to determine the number of the outwardly expanding pixel units by the following steps:

[0108] Step a) determining a first length according to the offset, the thickness and the refractive index of the first display panel;

[0109] Optionally, the first length is determined by the following way:

[0110] determining a first refraction angle according to the offset, the refractive index of air and the refractive index of the first display panel; determining the first length according to the thickness of the first display panel and the first refraction angle; wherein the first refraction angle is formed by refraction of the eye line of sight from air into the first display panel.

[0111] Step b) determining a second length according to the thickness and the refractive index of the medium, the offset, the refractive index of the first display panel and the refractive index of the second display panel; wherein the second refraction angle is formed by refraction of the eye line of sight from air into the first display panel and then into the medium through the first display panel;

[0112] Optionally, the second length is determined by the following way:

[0113] determining a second refraction angle according to the first refraction angle, the refractive index of the medium and the refractive index of the second display panel; determining the second length according to the thickness of the medium and the second refraction angle;

[0114] Step c) determining a third length according to the offset, the refractive index of the first display panel and the thickness of the second display panel;

[0115] Optionally, the third length is determined by the following way:

[0116] determining a third refraction angle according to the first refraction angle; determining the third length according to the thickness of the second display panel and the third refraction angle; wherein the third refraction angle is formed by refraction of the eye line of sight from air into the first display panel, then into the medium through the first display panel, and then into the medium through the medium.

[0117] In the implementation, since the materials of the first display panel and the second display panel are consistent, a first refraction angle formed by the eye line of sight entering the first display panel after air refraction is the same as a third refraction angle obtained by the eye line of sight being refracted to the medium layer through the first display panel and then being refracted to the second display panel through the medium layer. Therefore, the first refraction angle and the third refraction angle are the same.

[0118] Step d) determining the number of the outwardly expanded pixel units according to the first length, the second length, and the third length.

[0119] In the implementation, the number of the outwardly expanded pixel units is determined according to a sum value of the first length, the second length, and the third length.

[0120] As shown in FIG. 16, the embodiment provides a schematic diagram for determining the number of expanded pixels, where the display screen includes a first display panel and a second display panel, and a medium between the first display panel and the second display panel can be an air layer or an optical adhesive layer. An offset between the eye line of sight and the reference direction is θ°, a first refraction angle is β, a second refraction angle is α, a first length is L1, a second length is L2, a third length is L3, a thickness of the first display panel is d1, a thickness of the second display panel is d2, and a thickness of the medium is d3. The following takes different media as examples to illustrate the manner for determining the number of expanded pixels in the embodiment. The second refraction angle is α, the first length is L1, the second length is L2, the third length is L3, the thickness of the first display panel is d1, the thickness of the second display panel is d2, and the thickness of the medium is d3. The following takes different media as examples to illustrate the manner for determining the number of expanded pixels in the embodiment.

[0121] Manner 1: The medium between the first display panel and the second display panel is an air layer.

[0122] In the implementation, the first display panel includes an upper POL, a CF glass, a TFT glass, and a lower POL. Since the refractive index of the POL is very close to that of the CF glass and the TFT glass, the refractive index of the first display panel is unified as n2≈1.5, the refractive index of the second display panel is n2, and n1 represents the air refractive index. The thickness of the first display panel is set as d1, and the thickness of the second display panel is set as d2.

[0123] In the implementation, the number of the outwardly expanded pixel units is determined by the following formula: L=L1+L2+L3 Formula (1).

[0124] In the formula (1), L1 represents the first length, L2 represents the second length, and L3 represents the third length. L1 is a visual difference caused by the thickness refraction of the first display panel, L2 is a visual difference caused by the medium refraction between the first display panel and the second display panel, and L3 is a refraction visual difference caused by the thickness of the second display panel.

[0125] In implementation, L1, L2 and L3 are calculated by the following formulas:

[0126] In formula (2), d1 represents the thickness of the first display panel, L2=d3*tanα=L3*tanθ formula (3) ; wherein d3 represents the thickness of the medium, α represents the second refraction angle, and L2 represents the second length.

[0127] In formula (3), d3 represents the thickness of the medium, α represents the second refraction angle, and L2 represents the second length. Since the intermediate medium is an air layer, the relative refractive index from the first display panel to the medium is the same as that from the air to the first display panel, so θ=α.

[0128] In formula (4), d2 represents the thickness of the second display panel, L3=d2*tanα formula (4) ; wherein d2 represents the thickness of the second display panel, and tanα represents the first refraction angle / third refraction angle. Since the materials of the first display panel and the second display panel are consistent, and the intermediate substance is the same, the relative refractive index from the first display panel to the medium is consistent with that from the medium to the second display panel, so the first refraction angle and the third refraction angle are the same.

[0129] According to the formula of the relative refractive index: It is derived that:

[0130] In formula (5), n1 represents the air refractive index, n2 represents the refractive index of the second display panel, θ represents the offset between the eye line and the reference direction, L1=n1*n2*tanθ formula (5) ; wherein tanθ represents the first refraction angle.

[0131] Substitute the above formula (2), formula (3), formula (4) and formula (5) into formula (1) to obtain the following formula:

[0132] In formula (6), n1 represents the air refractive index, n2 represents the refractive index of the second display panel, d1 represents the thickness of the first display panel, d2 represents the thickness of the second display panel, d3 represents the thickness of the medium, and θ represents the offset between the eye line and the reference direction.

[0133] In mode 2, the medium between the first display panel and the second display panel is an optical glue layer.

[0134] In implementation, when the intermediate layer of the first display panel and the second display panel is an optical glue layer, the refractive index n3 of the medium is not fixed at this time, and the refractive index will be different according to different optical glue models, so the number of extended pixel units needs to be determined by the following method.

[0135] In implementation, L1, L2, L3 are calculated by the following formulas:

[0136] In formula (7), d1 represents the thickness of the first display panel, represents the first refraction angle, and L1 represents the first length. L2 = d3 x tan α Formula (8);

[0137] In formula (8), d3 represents the thickness of the medium, α represents the second refraction angle, and L2 represents the second length.

[0138] In formula (9), d2 represents the thickness of the second display panel, represents the first / third refraction angle, and L3 represents the third length.

[0139] According to the formula of relative refractive index: It is derived that:

[0140] In formula (10), n1 represents the air refractive index, n2 represents the refractive index of the second display panel, θ represents the offset between the eye line and the reference direction, represents the first refraction angle.

[0141] According to the formula of relative refractive index It is derived that:

[0142] Substitute the above formula (7), formula (8), formula (9), formula (10), formula (11) into formula (1), to obtain the following formula:

[0143] In formula (12), n1 represents the air refractive index, n2 represents the refractive index of the second display panel, n3 represents the refractive index of the medium, d1 represents the thickness of the first display panel, d2 represents the thickness of the second display panel, d3 represents the thickness of the medium, and θ represents the offset between the eye line and the reference direction.

[0144] In some embodiments, the luminance of the pixel units of the display panel, which are expanded outward from the partial boundary of the luminance region in the direction from the center of the luminance region to the boundary of the luminance region, decreases in turn along the direction from the center of the luminance region to the boundary of the luminance region. The luminance of the expansion region can be set to decrease, regardless of the expansion algorithm corresponding to the normal viewing angle or the large viewing angle, to further improve the display effect. As shown in FIGS. 17A-17B, the present embodiment provides a schematic diagram of setting the luminance of the expansion region to decrease, wherein the first pixel on the first display panel is lighted, the second pixel corresponding to the first pixel on the second display panel is the luminance region, the eye views the left side of the display screen, the offset between the eye line and the reference direction is greater than 10°, a plurality of pixel units are expanded outward from the left boundary of the luminance region to obtain the expansion region, and the luminance of the plurality of pixel units expanded outward is set to decrease in turn, that is, the gray scale values of the plurality of pixel units expanded outward decrease in turn. The luminance of the pixel A of the expansion region is less than the luminance of the second pixel of the luminance region, and the luminance of the pixel B of the expansion region is less than the luminance of the pixel A of the expansion region.

[0145] On the one hand, the present embodiment can solve the phenomenon that the display screen becomes dark or disappears when observed at a large viewing angle, and the phenomenon that a halo exists when observed at a normal viewing angle, by setting the expansion region, the transition region, and the luminance decreasing manner of the luminance region-expansion region-transition region. On the other hand, the expansion region can be determined by the expansion algorithm corresponding to different viewing angle ranges, and different expansion algorithms can be used to improve the display effect of the display screen at different viewing angles according to the correspondence between the eye position and the expansion algorithm.

[0146] Based on the same inventive concept, the present embodiment also provides a method for improving the display effect. Since the principle of solving the problem of the method is similar to that of the display device, the implementation of the method can be referred to the implementation of the display device, and the repeated parts will not be described herein.

[0147] As shown in FIG. 18, the method is applied to a display screen, which includes a first display panel and a second display panel; one pixel unit in the first display panel corresponds to one pixel unit in the second display panel; and the specific implementation process of the method is as follows:

[0148] In step 1800, a second pixel in the second display panel, which overlaps the orthographic projection of the first pixel on the second display panel, is determined according to the first pixel lighted on the first display panel; the first pixel includes at least one pixel unit.

[0149] In step 1801, the position of the second pixel is determined as a luminance region, and the positions of the adjacent pixels of the second pixel are determined as an expansion region.

[0150] Step 1802, adjusting the picture of the first display panel according to the luminance change of the luminance area and the expansion area, wherein the luminance of the expansion area is less than the luminance of the luminance area.

[0151] As an optional implementation, the size of the expansion area is determined by expanding at least one pixel unit outward from the starting position of the boundary of the luminance area along the direction from the center of the luminance area to the boundary of the luminance area.

[0152] As an optional implementation, the method further comprises:

[0153] The position of the adjacent pixel unit away from the side of the luminance area of the expansion area is determined as a transition area, wherein the luminance of the transition area is less than the luminance of the expansion area.

[0154] As an optional implementation, the size of the transition area is determined by expanding at least one pixel unit outward from the starting position of the boundary of the expansion area along the direction from the center of the luminance area to the boundary of the luminance area.

[0155] As an optional implementation, the display device further comprises a position sensing module; the method further comprises:

[0156] detecting the eye position by the position sensing module to determine the viewing angle range corresponding to the eye position;

[0157] determining the expansion area from the adjacent area of the luminance area according to the expansion algorithm corresponding to the viewing angle range, wherein the expansion algorithm corresponding to different viewing angle ranges is different.

[0158] As an optional implementation, the viewing angle range represents that the offset between the eye line and the reference direction is greater than a first threshold value and less than a second threshold value, and the reference direction represents the direction in which the eye line is directly opposite the center of the display screen; and the determination of the expansion area from the adjacent area of the luminance area according to the expansion algorithm corresponding to the viewing angle range comprises:

[0159] expanding at most one pixel unit outward from the starting position of at least part of the boundary of the luminance area along the direction from the center of the luminance area to the boundary of the luminance area to obtain the expansion area.

[0160] As an optional implementation, the viewing angle range represents that the offset between the eye line and the reference direction is less than or equal to a first threshold value, or the viewing angle range represents that the offset between the eye line and the reference direction is greater than or equal to a second threshold value, and the reference direction represents the direction in which the eye line is directly opposite the center of the display screen; and the determination of the expansion area from the adjacent area of the luminance area according to the expansion algorithm corresponding to the viewing angle range comprises:

[0161] The expansion region is obtained by expanding outward at least one pixel unit from a starting position of a partial boundary of the luminance region in a direction along which the center of the luminance region points to a boundary of the luminance region.

[0162] As an optional implementation, the position of the at least partial boundary of the luminance region is determined according to the direction of the eye gaze; wherein the incidence point of the eye gaze on the second panel is located at the position of the at least partial boundary of the luminance region.

[0163] As an optional implementation, the number of pixel units expanded outward from the starting position of the partial boundary of the luminance region is determined by:

[0164] The number of pixel units expanded outward is determined according to the offset between the eye gaze and the reference direction, the thickness and refractive index of the first display panel, the thickness and refractive index of the second display panel, and the thickness and refractive index of the medium between the first display panel and the second display panel.

[0165] As an optional implementation, the determination of the number of pixel units expanded outward includes:

[0166] A first length is determined according to the offset, the thickness and refractive index of the first display panel;

[0167] A second length is determined according to the thickness and refractive index of the medium, the offset, the refractive index of the first display panel, and the refractive index of the second display panel;

[0168] A third length is determined according to the offset, the refractive index of the first display panel, and the thickness of the second display panel;

[0169] The number of pixel units expanded outward is determined according to the first length, the second length, and the third length.

[0170] As an optional implementation, the determination of the third length according to the offset, the refractive index of the first display panel, and the thickness of the second display panel includes:

[0171] A first refraction angle is determined according to the offset, the refractive index of air, and the refractive index of the first display panel, and a first length is determined according to the thickness of the first display panel and the first refraction angle;

[0172] A second refraction angle is determined according to the first refraction angle, the refractive index of the medium, and the refractive index of the second display panel, and a second length is determined according to the thickness of the medium and the second refraction angle;

[0173] A third refraction angle is determined according to the first refraction angle, and a third length is determined according to the thickness of the second display panel and the third refraction angle.

[0174] As an optional implementation,

[0175] The luminance of the pixel unit, which is expanded outward from the partial boundary of the luminance area as a starting position along a direction in which the center of the luminance area points to the boundary of the luminance area, decreases successively along the direction in which the center of the luminance area points to the boundary of the luminance area.

[0176] As an optional implementation, one pixel unit of the first display panel includes three sub-pixels, which are an R sub-pixel, a G sub-pixel and a B sub-pixel respectively; and one pixel unit of the second display panel includes at least one sub-pixel.

[0177] Based on the same inventive concept, the embodiment of the disclosure also provides a device for improving display effect. Since the device is the device in the method of the embodiment of the disclosure, and the principle of the device for solving the problem is similar to that of the method, the implementation of the device can be referred to the implementation of the method, and the repeated parts will not be described here.

[0178] As shown in FIG. 19, the device includes:

[0179] The pixel determination module 1900 is configured to determine, according to the first pixel that is lighted in the first display panel, a second pixel in the second display panel that overlaps with the orthographic projection of the first pixel on the second display panel; the first pixel includes at least one pixel unit.

[0180] The inflation determination module 1901 is configured to determine the position of the second pixel as a luminance area, and determine the position of the adjacent pixel of the second pixel as an inflation area.

[0181] The luminance control module 1902 is configured to control the luminance of the picture of the first display panel according to the luminance change of the luminance area and the inflation area, wherein the luminance of the inflation area is less than the luminance of the luminance area.

[0182] Based on the same inventive concept, the embodiment of the disclosure provides a computer storage medium, which includes computer program code, when the computer program code runs on a computer, the computer program code causes the computer to execute any of the methods for improving display effect as discussed above. Since the principle of the computer storage medium for solving the problem is similar to that of the method for improving display effect, the implementation of the computer storage medium can be referred to the implementation of the method, and the repeated parts will not be described here.

[0183] In specific implementation process, the computer storage medium can include: universal serial bus flash drive (USB, Universal Serial Bus Flash Drive), mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and various storage medium that can store program codes.

[0184] 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 method for improving display effect as any one of the foregoing embodiments. Since the principle of the computer program product for solving the problem is similar to the method for improving display effect, 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.

[0185] 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 readable storage medium include: electrical connection with one or more conductive wires, portable disk, hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.

[0186] 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.

[0187] 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.

[0188] 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.

[0189] 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.

[0190] 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 present disclosure, the present disclosure can be practiced otherwise than as specifically described. Thus, unless specifically stated otherwise, concepts survived the true scope of the present disclosure and equivalents thereof.

Claims

1. A display device, wherein, The display device comprises a display screen and a control circuit, wherein: The display screen comprises a first display panel and a second display panel, the first display panel and the second display panel are arranged in layers, one pixel unit in the first display panel corresponds to one pixel unit in the second display panel, the first display panel is used for picture display, and the second display panel is used for picture dimming. The control circuit comprises a processor and a memory, the memory is used for storing programs executable by the processor, and the processor is used for reading programs in the memory and performing the following steps: According to the first pixel lit in the first display panel, the second pixel in the second display panel is determined, which overlaps the orthographic projection of the first pixel on the second display panel; the first pixel comprises at least one pixel unit; The position of the second pixel is determined as a brightness area, and the position of the adjacent pixel of the second pixel is determined as an inflation area; wherein the brightness of the inflation area is less than the brightness of the brightness area.

2. The display device of claim 1, wherein, The size of the inflation area is determined by expanding at least one pixel unit outward from the boundary of the brightness area in the direction from the center of the brightness area to the boundary of the brightness area.

3. The display device of claim 1, wherein, The processor is specifically further configured to perform: The position of the adjacent pixel unit of the inflation area away from one side of the brightness area is determined as a transition area; wherein the brightness of the transition area is less than the brightness of the inflation area.

4. The display device of claim 3, wherein, The size of the transition area is determined by expanding at least one pixel unit outward from the boundary of the inflation area in the direction from the center of the brightness area to the boundary of the brightness area.

5. The display device of claim 1, wherein, The display device further comprises a position sensing module; the processor is specifically further configured to perform: The eye position is detected by the position sensing module to determine the viewing angle range corresponding to the eye position; According to the inflation algorithm corresponding to the viewing angle range, the inflation area is determined from the adjacent area of the brightness area, wherein the inflation algorithm corresponding to different viewing angle ranges is different.

6. The display device of claim 5, wherein, The viewing angle range represents that the offset between the eye line and the reference direction is greater than a first threshold value and less than a second threshold value, and the reference direction represents the direction in which the eye line is directly opposite the center of the display screen; the processor is specifically configured to perform: In the direction from the center of the brightness area to the boundary of the brightness area, at least part of the boundary of the brightness area is taken as the starting position to expand at most one pixel unit outward to obtain the inflation area.

7. The display device of claim 5, wherein, The viewing angle range represents that the offset between the eye line and the reference direction is less than or equal to a first threshold value, or the viewing angle range represents that the offset between the eye line and the reference direction is greater than or equal to a second threshold value, and the reference direction represents the direction in which the eye line is directly opposite the center of the display screen; the processor is specifically configured to perform: In the direction from the center of the brightness area to the boundary of the brightness area, at least part of the boundary of the brightness area is taken as the starting position to expand at least one pixel unit outward to obtain the inflation area.

8. The display device of claim 6 or 7, wherein, At least part of the boundary of the brightness area is determined according to the direction of the eye line; wherein the landing point of the eye line on the second panel is located at the position of at least part of the boundary of the brightness area.

9. The display device of claim 7, wherein, The processor is specifically configured to perform: The number of the outwardly expanded pixel units is determined according to the offset between the eye line and the reference direction, the thickness and the refractive index of the first display panel, the thickness and the refractive index of the second display panel, and the thickness and the refractive index of the medium between the first display panel and the second display panel.

10. The display device of claim 7, wherein, The luminance of the pixel unit outwardly expanded from the partial boundary of the luminance region in the direction from the center of the luminance region to the boundary of the luminance region decreases successively.

11. The display device of claim 1, wherein, One pixel unit of the first display panel includes three sub-pixels, which are R sub-pixel, G sub-pixel and B sub-pixel respectively; and one pixel unit of the second display panel includes at least one sub-pixel.

12. A method of improving display effects, wherein, The method is applied to a display screen, and the display screen includes a first display panel and a second display panel; one pixel unit in the first display panel corresponds to one pixel unit in the second display panel; and the method includes: According to the first pixel in the first display panel that is lighted, a second pixel in the second display panel is determined, which overlaps the orthographic projection of the first pixel on the second display panel; the first pixel includes at least one pixel unit; The position of the second pixel is determined as a luminance region, and the position of the adjacent pixel of the second pixel is determined as an inflation region; According to the luminance variation of the luminance region and the inflation region, the picture of the first display panel is dimmed, wherein the luminance of the inflation region is less than the luminance of the luminance region.

13. The method of claim 12, wherein, The size of the inflation region is determined by outwardly expanding at least one pixel unit from the boundary of the luminance region in the direction from the center of the luminance region to the boundary of the luminance region.

14. The method of claim 12, wherein, The method further includes: The position of the adjacent pixel unit of the inflation region away from one side of the luminance region is determined as a transition region; wherein the luminance of the transition region is less than the luminance of the inflation region.

15. The method of claim 14, wherein, The size of the transition region is determined by outwardly expanding at least one pixel unit from the boundary of the inflation region in the direction from the center of the luminance region to the boundary of the luminance region.

16. The method of claim 12, wherein, The display device further includes a position sensing module; and the method further includes: An eye position is detected by the position sensing module to determine a visual angle range corresponding to the eye position; According to the inflation algorithm corresponding to the visual angle range, an inflation region is determined from the adjacent region of the luminance region, wherein the inflation algorithm corresponding to different visual angle ranges is different.

17. The method of claim 16, wherein, The visual angle range represents that the offset between the eye line and the reference direction is greater than a first threshold value and less than a second threshold value, and the reference direction represents the direction in which the eye line directly faces the center of the display screen; and according to the inflation algorithm corresponding to the visual angle range, the inflation region is determined from the adjacent region of the luminance region, which includes: The inflation region is obtained by outwardly expanding at most one pixel unit from at least part of the boundary of the luminance region in the direction from the center of the luminance region to the boundary of the luminance region.

18. The method of claim 16, wherein, The visual angle range represents that an offset between the eye line of the eye and a reference direction is less than or equal to a first threshold, or the visual angle range represents that the offset between the eye line of the eye and the reference direction is greater than or equal to a second threshold, the reference direction representing a direction in which the eye line of the eye is directed to the center of the display screen; and the determining the expansion region from the adjacent region of the brightness region according to the expansion algorithm corresponding to the visual angle range comprises: extending outward by at least one pixel unit from a partial boundary of the brightness region as a starting position in a direction from the center of the brightness region to the boundary of the brightness region to obtain the expansion region.

19. The method of claim 17 or 18, wherein, The position of at least a partial boundary of the brightness region is determined according to the direction of the eye line; and a landing point of the eye line on the second panel is located at the position of at least a partial boundary of the brightness region.

20. The method of claim 18, wherein, The number of pixel units extended outward from the partial boundary of the brightness region as the starting position is determined in the following manner: The number of pixel units extended outward is determined according to the offset between the eye line and the reference direction, the thickness and the refractive index of the first display panel, the thickness and the refractive index of the second display panel, and the thickness and the refractive index of the medium between the first display panel and the second display panel.

21. The method of claim 20, wherein, The determination of the number of pixel units extended outward comprises: determining a first length according to the offset, the thickness and the refractive index of the first display panel; determining a second length according to the thickness and the refractive index of the medium, the offset, the refractive index of the first display panel and the refractive index of the second display panel; determining a third length according to the offset, the refractive index of the first display panel and the thickness of the second display panel; and determining the number of pixel units extended outward according to the first length, the second length and the third length. The determination of the third length according to the offset, the refractive index of the first display panel and the thickness of the second display panel comprises:

22. The method of claim 21, wherein, determining a first refraction angle according to the offset, the refractive index of air and the refractive index of the first display panel, and determining a first length according to the thickness of the first display panel and the first refraction angle; determining a second refraction angle according to the first refraction angle, the refractive index of the medium and the refractive index of the second display panel, and determining a second length according to the thickness of the medium and the second refraction angle; determining a third refraction angle according to the first refraction angle, and determining a third length according to the thickness of the second display panel and the third refraction angle.

23. The method of claim 18, wherein: the brightness of the pixel units extended outward from the partial boundary of the brightness region as the starting position in the direction from the center of the brightness region to the boundary of the brightness region decreases successively along the direction. One pixel unit of the first display panel comprises three sub-pixels, which are an R sub-pixel, a G sub-pixel and a B sub-pixel respectively; and one pixel unit of the second display panel comprises at least one sub-pixel.

24. The method of claim 12, wherein, The program is executed by the processor to implement the steps of the method of any one of claims 12-24.

25. A computer storage medium having stored thereon a computer program, wherein, The program is executed by the processor to implement the steps of the method of any one of claims 12-24.

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