A tiled display

Abstract

The embodiment of the present disclosure discloses a tiled display screen. In a specific embodiment, the tiled display screen comprises a plurality of display screen units, the display screen units comprising a plurality of sub-pixels arranged in an array, and the tiled display screen further comprises at least one lens structure arranged on the light exit side of the tiled display screen, the lens structure comprising a first lens, the first lens covering a gap between adjacent display screen units in a first direction, the adjacent display screen units comprising a first display screen unit and a second display screen unit, the first direction being the direction in which the first display screen unit points to the second display screen unit, and the lens structure further covering part of the sub-pixels of the first display unit close to the second display screen unit and part of the sub-pixels of the second display screen unit close to the first display screen unit. This embodiment can effectively improve the dark lines between adjacent display screen units when the tiled display screen is displaying, and improve the display effect.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display. More particularly, it relates to a tiled display screen. BACKGROUND

[0002] With the rapid development of flat panel display technology, its size and application scenarios are constantly expanding. At the same time, due to the limitation of the size of various display units, various display units are spliced to realize a super large size tiled display screen, which has been applied to various aspects of life, such as outdoor advertising, sports stadiums, command halls, shopping malls, and other application scenarios. The tiled display screen can splice multiple display units to realize super large size display according to actual display needs, and has the advantages of clear picture display, flexibility, etc.

[0003] However, when the tiled display screen displays, dark lines usually appear between adjacent display units, especially when the user watches at a close distance, the dark lines are more obvious, affecting the display effect. SUMMARY

[0004] The purpose of the present disclosure is to provide a tiled display screen to solve at least one of the problems in the prior art.

[0005] To achieve the above purpose, the present disclosure adopts the following technical solutions:

[0006] The present disclosure provides a tiled display screen, comprising a plurality of display units, the display unit comprising a plurality of sub-pixels arranged in an array, the tiled display screen further comprising at least one lens structure arranged on the light exit side of the tiled display screen, the lens structure comprising a first lens, the first lens covering the gap between adjacent display units in a first direction, the adjacent display units comprising a first display unit and a second display unit, the first direction being the direction of the first display unit pointing to the second display unit, the lens structure further covering the part of the sub-pixels of the first display unit close to the second display unit and the part of the sub-pixels of the second display unit close to the first display unit.

[0007] Optionally, in the first direction, the center of the first lens coincides with the center of the gap.

[0008] Optionally, in a second direction, the length of the first lens is equal to the length of the gap, the second direction being a direction perpendicular to the first direction in a plane perpendicular to the light exit direction of the tiled display screen.

[0009] Optionally, the side of the first lens away from the gap is a convex surface, and the side close to the gap is a plane.

[0010] Optionally, the surface type of the first lens is designed as:

[0011]

[0012] wherein z is a length value of the first lens in a Z direction of a three-dimensional rectangular coordinate system, x is a length value of the first lens in an X direction of the three-dimensional rectangular coordinate system, y is a length value of the first lens in a Y direction of the three-dimensional rectangular coordinate system, the X direction of the three-dimensional rectangular coordinate system is the first direction, the Y direction is the second direction, the Z direction is the third direction, and the origin is a planar center point of the first lens, the third direction is a light-out direction of the spliced display screen, the second direction is a direction perpendicular to the first direction in a plane perpendicular to the third direction, k is a curvature coefficient of the first lens, c is a curvature of the first lens, r is a radius of curvature of the first lens, m takes a plurality of first preset values of a preset number, n = 0, j = [(m + n) + 3n] / 2 + 1, c 2 is a coefficient taking the second preset value, and N is a third preset value. j m n

[0013] Optionally, the first lens covers N rows of sub-pixels of the first display unit close to the second display screen unit and N rows of sub-pixels of the second display screen unit close to the first display screen unit.

[0014] Optionally, the N takes a value of 1 to 4.

[0015] Optionally, the spliced display screen further comprises a display controller, and the display controller is configured to improve display brightness of N rows of sub-pixels of the first display unit close to the second display screen unit and N rows of sub-pixels of the second display screen unit close to the first display screen unit when the first display screen unit and the second display screen unit are controlled to display.

[0016] Optionally, the lens structure further comprises a plurality of second lenses arranged in an array on the curved surface of the first lens.

[0017] Optionally, adjacent second lenses abut.

[0018] Optionally, the array of the plurality of second lenses on the curved surface of the first lens is arranged in a diamond shape, a hexagon, or a rectangle.

[0019] Optionally, a side of the second lens away from the first lens is a convex curved surface, and a side of the second lens close to the first lens is a planar surface.

[0020] Optionally, the convex curved surface of the second lens is a spherical surface.

[0021] The beneficial effects of the present disclosure are as follows: ​​​

[0022] The technical solutions of the present disclosure can effectively improve the dark lines between adjacent display screen units when the spliced display screen displays, improve the display effect, and improve the user viewing experience. BRIEF DESCRIPTION OF DRAWINGS

[0023] The specific embodiments of the present disclosure will be described in further detail below with reference to the accompanying drawings.

[0024] Figure 1 A display effect schematic diagram of an OLED spliced display screen in the related art is shown.

[0025] Figure 2 A cross-sectional schematic diagram of an OLED spliced display screen provided by an embodiment of the present disclosure in the XY plane is shown.

[0026] Figure 3 A cross-sectional schematic diagram of the position of adjacent OLED display screen units in the OLED spliced display screen provided by an embodiment of the present disclosure in the XZ plane is shown.

[0027] Figure 4 A cross-sectional schematic diagram of a main lens in the XY plane is shown.

[0028] Figure 5 A schematic diagram of the main lens covering two sub-pixels of adjacent display units in the XY plane is shown.

[0029] Figure 6 A display effect schematic diagram of an OLED spliced display screen provided by an embodiment of the present disclosure is shown.

[0030] Figure 7 A cross-sectional schematic diagram of a lens structure in the XZ plane is shown.

[0031] Figure 8 A cross-sectional schematic diagram of the lens structure in the XY plane is shown. Figure 7 A cross-sectional schematic diagram of the lens structure in the XY plane is shown.

[0032] Figure 9 A cross-sectional schematic diagram of the lens structure in the XZ plane is shown. Figure 7 A three-dimensional schematic diagram of the lens structure is shown.

[0033] Figure 10 Another cross-sectional schematic diagram of the lens structure in the XZ plane is shown.

[0034] Figure 11 A cross-sectional schematic diagram of the lens structure in the XY plane is shown. Figure 10 A cross-sectional schematic diagram of the lens structure in the XY plane is shown.

[0035] Figure 12 A three-dimensional schematic diagram of the lens structure is shown. Figure 10 A three-dimensional schematic diagram of the lens structure is shown. DETAILED DESCRIPTION

[0036] The "on", "formed on" and "disposed on" described in the present disclosure can mean that one layer is directly formed or disposed on another layer, or can mean that one layer is indirectly formed or disposed on another layer, i.e. there are other layers between the two layers.

[0037] It should be noted that although the terms "first", "second" and the like can be used herein to describe various components, members, elements, regions, layers and / or sections, these components, members, elements, regions, layers and / or sections should not be limited by these terms. Rather, these terms are used to distinguish one component, member, element, region, layer and / or section from another. Thus, for example, the first component, the first member, the first element, the first region, the first layer and / or the first section discussed below can be referred to as the second component, the second member, the second element, the second region, the second layer and / or the second section without departing from the teachings of the present disclosure.

[0038] In the present disclosure, unless otherwise specified, the term "disposed in the same layer" means that two layers, components, members, elements or sections can be formed by the same preparation process (e.g. patterning process, etc.), and the two layers, components, members, elements or sections are generally formed by the same material. For example, two or more functional layers disposed in the same layer means that these functional layers disposed in the same layer can be formed using the same material layer and the same preparation process, so that the preparation process of the display substrate can be simplified.

[0039] In the present disclosure, unless otherwise specified, the expression "patterning process" generally includes the steps of coating, exposing, developing, etching, stripping of photoresist, etc. The expression "one-time patterning process" means a process of forming a patterned layer, component, member, etc. using one mask plate.

[0040] For the type of spliced display screen such as an OLED (Organic Light Emitting Device) spliced display screen obtained by splicing OLED display screen units, an LCD (Liquid Crystal Display) spliced display screen obtained by splicing LCD display screen units, etc., due to the reasons such as that the spliced display screen generally has a certain width of frame, the precision of splicing assembly is limited, etc., there is generally a gap between adjacent display screen units, for example, the gap width between adjacent OLED display screen units is 0.7mm-1.5mm, so that when the spliced display screen displays, dark lines will appear between adjacent display screen units, especially when the user watches at a closer distance, the dark lines are more obvious, which affects the continuity and integrity of the display screen display picture, affects the display effect, and the user's watching experience is not good. For example Figure 1The shown OLED tiled display screen including four OLED tiled display units, when displaying, a cross-shaped dark line appears in the center of the OLED tiled display screen.

[0041] Therefore, the embodiments of the present disclosure provide a tiled display screen, including a plurality of display screen units, each of the display screen units including a plurality of sub-pixels arranged in an array, and the tiled display screen further includes at least one lens structure arranged on a light-out side of the tiled display screen, the lens structure including a main lens, the main lens covering a gap between adjacent display screen units in a first direction, the adjacent display screen units including a first display screen unit and a second display screen unit, the first direction being a direction in which the first display screen unit points to the second display screen unit, and the lens structure further covering part of the sub-pixels of the first display unit close to the second display screen unit and part of the sub-pixels of the second display screen unit close to the first display screen unit.

[0042] The main lens arranged at the gap between the adjacent display screen units can refract the display light emitted by the mutually close edge sub-pixels of the adjacent display screen units when the tiled display screen is displaying, thereby effectively improving the dark line appearing between the adjacent display screen units when the tiled display screen is displaying, improving the display effect, and improving the user viewing experience.

[0043] In the following, the embodiments of the present disclosure are described by taking OLED display screen units as an example, but the embodiments of the present disclosure are not limited thereto, for example, the display screen units used for tiling can include but are not limited to PLED (Polymer Light Emitting Device) display screen units, Micro LED (Micro Light Emitting Diode) display screen units, Mini LED (Mini Light Emitting Diode) display screen units, QD (Quantum Dot) display screen units, LCD display screen units, or other types of display screen units, etc.

[0044] In a specific example, for example Figure 2As shown, the OLED spliced display screen provided by the embodiment of the present disclosure includes four OLED display screen units 201, 202, 203 and 204 arranged in the XY plane, each of the four OLED display screen units 201, 202, 203 and 204 includes a plurality of sub-pixels arranged in an array, the light emitting directions of the OLED display screen units 201, 202, 203 and 204 are the same, and the light emitting direction of the OLED spliced display screen is the Z direction perpendicular to the XY plane. During display, the display controller of the OLED spliced display screen divides the received overall picture signal into sub-picture signals corresponding to the picture partitions of each OLED display screen unit, and drives the OLED display screen unit to display the corresponding sub-picture by using the sub-picture signal corresponding to the picture partition of each OLED display screen unit, and the sub-pictures displayed by each OLED display screen unit combine to form the overall picture of the OLED spliced display screen. For example, the cross-sectional shape of the OLED display screen units 201, 202, 203 and 204 in the XY plane is a rectangle close to a square, and the OLED spliced display screen provided by the embodiment of the present disclosure further includes four main lenses, which are a main lens 211 arranged at the gap between the OLED display screen unit 201 and the OLED display screen unit 202, a main lens 212 arranged at the gap between the OLED display screen unit 202 and the OLED display screen unit 203, a main lens 213 arranged at the gap between the OLED display screen unit 203 and the OLED display screen unit 204, and a main lens 214 arranged at the gap between the OLED display screen unit 201 and the OLED display screen unit 204. The fixing mode of the main lens 211 is, for example, adhered by a transparent optical adhesive at the gap between the OLED display screen unit 201 and the OLED display screen unit 202, and the adhesive position includes at least one of the gap between the OLED display screen unit 201 and the OLED display screen unit 202, the left side edge of the OLED display screen unit 201, and the right side edge of the OLED display screen unit 202. The fixing modes of the main lenses 212, 213 and 214 are similar to that of the main lens 211. In addition, the main lenses 211, 212, 213 and 214 can also be integrally formed after being designed respectively, and are integrally fixed to the light emitting side of the OLED spliced display screen.

[0045] As shown, the main lens 211 covers the gap between the OLED display screen units 201 and 202 in the first direction (the direction in which the OLED display screen unit 201 points to the OLED display screen unit 202, i.e., the X direction in the XY plane), and the main lens 211 also covers the part of the sub-pixels of the OLED display screen unit 201 close to the OLED display screen unit 202 (i.e., the Y direction in the XY plane). Figure 3 Figure 3 As shown, the main lens 211 covers the gap between the OLED display screen units 201 and 202 in the first direction (the direction in which the OLED display screen unit 201 points to the OLED display screen unit 202, i.e., the X direction in the XY plane), and the main lens 211 also covers the part of the sub-pixels of the OLED display screen unit 201 close to the OLED display screen unit 202 (i.e., the Y direction in the XY plane). Figure 3 ​the right edge of the OLED display screen unit 201) and the partial sub-pixels of the OLED display screen unit 202 close to the OLED display screen unit 201 (i.e. Figure 3 the left edge of the OLED display screen unit 202), so that, for example Figure 3 the light path shown, the main lens 211 can refract the display light emitted from the right edge of the OLED display screen unit 201 and the display light emitted from the left edge of the OLED display screen unit 202 when the OLED tiled display screen displays, thereby effectively improving the dark lines between the OLED display screen units 201 and 202.

[0046] In a possible implementation, the side of the main lens away from the gap is a convex surface, and the side close to the gap is a plane. Taking the main lens 211 as an example, Figure 3 the cross-sectional view of the main lens 211 in the XZ plane of the XYZ three-dimensional orthogonal coordinate system is shown, and the cross-sectional view of the main lens 211 in the XY plane is as shown in Figure 4 the cross-sectional view of the main lens 211 in the XZ plane of the XYZ three-dimensional orthogonal coordinate system is shown, and the cross-sectional view of the main lens 211 in the XY plane is as shown in Figure 3 and Figure 4 As shown, the main lens 211 extends along the Y direction (i.e., the extension direction of the gap between the OLED display screen units 201 and 202), and the cross section of the main lens 211 in the XZ plane (a plane perpendicular to the Y direction) is a plano-convex lens. The bottom surface of the main lens 211 close to the gap is a plane, and the top surface of the main lens 211 away from the gap is a convex surface.

[0047] In a possible implementation, the adjacent OLED display screen units include a first OLED display screen unit and a second OLED display screen unit, and the main lens covers N rows of sub-pixels of the first OLED display unit close to the second OLED display screen unit and N rows of sub-pixels of the second OLED display screen unit close to the first OLED display screen unit.

[0048] In a possible implementation, the N is 1 to 4.

[0049] In this way, the effect of improving the dark lines between the adjacent OLED display screen units can be ensured, and the display of each OLED display screen unit is not affected.

[0050] In a specific example, for example Figure 5 the main lens 211 covers 2 columns of sub-pixels 2011 and 2012 of the OLED display screen unit 201 close to the OLED display screen unit 202 (i.e. Figure 3 and Figure 5 2 columns of sub-pixels of the OLED display screen unit 201 on the right edge) and 2 columns of sub-pixels 2021 and 2022 of the OLED display screen unit 202 close to the OLED display screen unit 201 (i.e.Figure 3 and Figure 5 the left side 2 columns of sub-pixels of the OLED display screen unit 202), so that, for example Figure 3 the light path shown in FIG. 6, when the OLED tiled display screen displays, the main lens 211 can refract the display light emitted by the right side 2 columns of sub-pixels of the OLED display screen unit 201 and the display light emitted by the left side 2 columns of sub-pixels of the OLED display screen unit 202, thereby effectively improving the dark lines between the OLED display screen units 201 and 202.

[0051] It can be understood that the main lens 212 covers 2 rows of sub-pixels of the OLED display screen unit 202 close to the OLED display screen unit 203 (i.e. Figure 3 2 rows of sub-pixels of the OLED display screen unit 202 below in FIG. 5) and 2 rows of sub-pixels of the OLED display screen unit 203 close to the OLED display screen unit 202 (i.e. Figure 3 2 rows of sub-pixels of the OLED display screen unit 203 above in FIG. 5). In addition, for the main lens 212 corresponding to the gap between the OLED display screen units 202 and 203, the first direction - the direction in which the OLED display screen unit 202 points to the OLED display screen unit 203 is Figure 2 the Y direction in FIG. 5.

[0052] In a possible implementation, the OLED tiled display screen further includes a display controller, and the display controller is configured to improve the display brightness of N rows of sub-pixels of the first OLED display unit close to the second OLED display unit and N rows of sub-pixels of the second OLED display unit close to the first OLED display unit when controlling the first OLED display unit and the second OLED display unit to display.

[0053] In the preceding example, when the main lens 211 covers 2 columns of sub-pixels 2011 and 2012 of the OLED display screen unit 201 close to the OLED display screen unit 202 (i.e. Figure 3 and Figure 5 2 columns of sub-pixels of the OLED display screen unit 201 on the right side in FIG. 5) and 2 columns of sub-pixels 2021 and 2022 of the OLED display screen unit 202 close to the OLED display screen unit 201 (i.e. Figure 3 and Figure 5 2 columns of sub-pixels of the OLED display screen unit 202 on the left side in FIG. 5), the display controller is configured to improve the display brightness of 2 columns of sub-pixels 2011 and 2012 of the OLED display screen unit 201 close to the OLED display screen unit 202 (i.e. Figure 3 and Figure 5The two right-hand sub-pixels of the OLED display unit 201 and the two columns of sub-pixels 2021 and 2022 of the OLED display unit 202 adjacent to the OLED display unit 201 (i.e., Figure 3 and Figure 5 The display brightness of the two left-hand columns of sub-pixels in the OLED display unit 202.

[0054] This further ensures the improvement of dark patterns between adjacent OLED display units and further avoids affecting the display of each OLED display unit.

[0055] In one possible implementation, in a first direction, the center of the main lens coincides with the center of the gap.

[0056] For example Figure 3 As shown, in the first direction (the direction from OLED display unit 201 to OLED display unit 202), Figure 3 In the X direction, the center of the main lens 211 coincides with the center of the gap between the OLED display units 201 and 202. This facilitates the uniformity of light refraction on both sides by the main lens, improves the dark lines between adjacent OLED display units, and enhances the display effect.

[0057] In one possible implementation, in a second direction, the length of the main lens is equal to the length of the gap, and the second direction is a direction perpendicular to the first direction within a plane perpendicular to the light emission direction of the OLED splicing display. Therefore, the main lens can completely cover the gap between adjacent OLED display units, which is more conducive to improving dark lines appearing between adjacent OLED display units.

[0058] For example, combining Figure 2 , Figure 3 and Figure 4 As shown, the light emission direction of the OLED splicing display is the Z direction. For the main lens 211, the second direction is the Y direction (i.e., the extension direction of the gap between OLED display units 201 and 202). In the Y direction, the length of the main lens 211 is equal to the length of the gap. For example, if the Y-direction length of OLED display unit 201 is 500mm and the Y-direction length of OLED display unit 202 is 500mm, and the two are aligned at their centers in the Y direction, then the Y-direction length of the gap between OLED display units 201 and 202 is 500mm. Therefore, the Y-direction length of the main lens 211 is also designed to be 500mm.

[0059] In one possible implementation, the surface profile of the main lens is designed as follows:

[0060]

[0061] wherein z is a length value of the main lens in a Z direction of a three-dimensional rectangular coordinate system, x is a length value of the main lens in an X direction of the three-dimensional rectangular coordinate system, y is a length value of the main lens in a Y direction of the three-dimensional rectangular coordinate system, the X direction of the three-dimensional rectangular coordinate system is the first direction, the Y direction is the second direction, the Z direction is the third direction, and the origin is a planar center point of the main lens, the third direction is a light-out direction of the OLED tiled display screen, the second direction is a direction perpendicular to the first direction in a plane perpendicular to the third direction, k is a curvature coefficient of the main lens, c is a curvature of the main lens, r is a radius of curvature of the main lens, m takes a plurality of first preset values of a preset number, n = 0, j = [(m + n) 2 +m+3n] / 2+1, c j is a coefficient taking a second preset value, and N is a third preset value. m y n .

[0062] The surface design formula of the above main lens is an XY polynomial surface formula. For example, as shown in Figure 2 , Figure 3 and Figure 4 , the light-out direction of the OLED tiled display screen is the Z direction. For the main lens 211, the second direction is the extension direction of the gap between the OLED display screen units 201 and 202, the first direction is the direction in which the OLED display screen unit 201 points to the OLED display screen unit 202, the maximum height (height is the length in the Z direction) of the main lens 211 is 0.5 mm, the inner diameter of the mold for preparing the same is 5.65684 mm, and the normalized radius of the main lens 211 is set to 1. For example, m takes four values of 2, 4, 6, and 8, and n takes a value of 0 (the XZ cross section is a plano-convex lens, and the z value is only related to the x value and not related to the y value, so n = 0). Then, j = [(m + n) 2 +m+3n] / 2+1, j takes four values of 4, 11, 22, and 37, that is, four c j are included, which are x 2 , x 4 , x 11 , and x 6 , respectively, and the corresponding coefficients c4, c 22 , c 8 , and c 37 , c4 = 0.05, c 11 = 0.006, c 22 = 0.0072, and c 37 = 0.000000535 are set, then z = 0.05x2 +0.006x 4 +0.0072x 6 +0.000000535x 8 For example, N is 66, and it can be understood that, since m only takes four values of 2, 4, 6 and 8, j does not have other values except 4, 11, 22 and 37, that is, c4, c 11 , c 22 , c 37 do not exist except c j , and it can also be understood that, except 4, 11, 22 and 37, other values of j from 2 to N correspond to c j values of 0.

[0063] In a possible implementation, the radius of curvature r of the main lens is infinite.

[0064] For example, the radius of curvature r of the main lens 211 is infinite, and the value of the item on the left side of the plus sign in the above XY polynomial surface type formula is 0, and the value of z is controlled by the multiple items on the right side of the plus sign in the XY polynomial surface type formula.

[0065] Figure 2 The display effect of the OLED spliced display screen is shown in Figure 6 Compared with Figure 6 and Figure 1 , it can be seen that the OLED spliced display screen provided by the present disclosure can significantly improve the dark lines appearing in adjacent OLED display screen units during display.

[0066] In a possible implementation, the lens structure further includes a plurality of microlenses arranged in an array on the curved surface of the main lens.

[0067] If the curved surface on the side away from the gap of the main lens (for example, the top surface of the main lens 211 in Figure 3 ) is a smooth curved surface, the distribution of refracted light may be uneven, and some areas may be dazzling to users. Therefore, in the present implementation, a plurality of microlenses arranged in an array are arranged on the curved surface of the main lens, so as to improve the uniformity of the light refracted by the lens structure and further improve the display effect.

[0068] In a possible implementation, the array of the plurality of microlenses is arranged in a diamond shape on the curved surface of the main lens.

[0069] For example Figure 7 , Figure 8 and Figure 9As shown, the array of multiple microlenses is arranged in a rhombus or oblique quadrilateral on the curved surface of the main lens. This design of multiple microlenses arranged in a rhombus on the curved surface of the main lens is beneficial to improving the density of the microlens arrangement, which in turn is more conducive to improving the uniformity of light refracted by the lens structure.

[0070] In one possible implementation, the plurality of microlenses are arranged closely together. For example... Figure 7 , Figure 8 and Figure 9 As shown, adjacent second lenses are abutted, meaning that multiple microlenses are arranged closely together with no gaps between adjacent microlenses. Due to process errors in the fabrication process, in this embodiment, a gap distance of less than 0.5 μm between adjacent second lenses, for example, a gap distance between adjacent second lenses of 0.1 μm and 0.3 μm, is considered as adjacent second lenses abutting.

[0071] In one possible implementation, the side of the microlens furthest from the main lens is a convex surface, while the side closer to the main lens is a flat surface. For example... Figure 7 , Figure 8 and Figure 9 As shown, the side of the microlens furthest from the main lens is a convex surface, while the side closer to the main lens is a flat surface.

[0072] In one possible implementation, the convex surface of the microlens is a sphere. For example, the convex surface of the microlens is a sphere with a radius of curvature r1 = 0.1 μm to 0.5 μm, specifically, the convex surface of the microlens is a sphere with a radius of curvature r1 = 0.2 μm.

[0073] In one possible implementation, besides, for example Figure 10 , Figure 11 and Figure 12 In addition to the rhomboid arrangement of the array of multiple microlenses on the curved surface of the main lens, the following designs can also be used: for example... ​ , ​ and ​ As shown, the array of multiple microlenses is arranged in a hexagonal pattern on the curved surface of the main lens. This design helps to increase the density of the microlens arrangement, thereby improving the uniformity of light refraction by the lens structure. Alternatively, the array of multiple microlenses can be arranged in a rectangular pattern on the curved surface of the main lens.

[0074] Obviously, the above embodiments of the present disclosure are merely examples for clearly illustrating the present disclosure, and are not intended to limit the implementation manners of the present disclosure. Based on the above description, other different forms of changes or variations can be made by those skilled in the art, and here, all the implementation manners cannot be enumerated, and any changes or variations that are derived from the technical solutions of the present disclosure and are obvious to those skilled in the art are still within the protection scope of the present disclosure.

Claims

1. A splicing display screen, comprising multiple display screen units, each display screen unit comprising multiple sub-pixels arranged in an array, characterized in that, The splicing display screen also includes at least one lens structure disposed on the light-emitting side of the splicing display screen. The lens structure includes a first lens, which covers the gap between adjacent display screen units in a first direction. The adjacent display screen units include a first display screen unit and a second display screen unit. The first direction is the direction from the first display screen unit to the second display screen unit. The lens structure also covers a portion of the sub-pixels of the first display screen unit that are close to the second display screen unit and a portion of the sub-pixels of the second display screen unit that are close to the first display screen unit. In the first direction, the center of the first lens coincides with the center of the gap; The side of the first lens furthest from the gap is a convex curved surface, while the side closest to the gap is a flat surface. The surface profile of the first lens is designed as follows: Where z is the length of the first lens in the Z direction of the three-dimensional Cartesian coordinate system, x is the length of the first lens in the X direction of the three-dimensional Cartesian coordinate system, y is the length of the first lens in the Y direction of the three-dimensional Cartesian coordinate system, the X direction of the three-dimensional Cartesian coordinate system is the first direction, the Y direction is the second direction, the Z direction is the third direction, and the origin is the center point of the plane of the first lens, the third direction is the light emission direction of the splicing display screen, the second direction is the direction perpendicular to the first direction in the plane perpendicular to the third direction, k is the surface curvature coefficient of the first lens, c is the curvature of the first lens, r is the radius of curvature of the first lens, m takes a preset number of first preset values, n=0, j=[(m+n)] 2 +m+3n] / 2+1,c j For x m y n The coefficient is taken as the second preset value, and N is the third preset value.

2. The splicing display screen according to claim 1, characterized in that, In the second direction, the length of the first lens is equal to the length of the gap, and the second direction is a direction perpendicular to the first direction in a plane perpendicular to the light emission direction of the splicing display screen.

3. The splicing display screen according to claim 1, characterized in that, The first lens covers the N rows of sub-pixels of the first display unit that are close to the second display unit and the N rows of sub-pixels of the second display unit that are close to the first display unit.

4. The splicing display screen according to claim 3, characterized in that, The value of N is between 1 and 4.

5. The splicing display screen according to claim 3, characterized in that, The splicing display screen also includes a display controller, which is used to increase the display brightness of the N rows of sub-pixels of the first display unit closest to the second display unit and the N rows of sub-pixels of the second display unit closest to the first display unit when controlling the first display unit and the second display unit to display.

6. The splicing display screen according to claim 1, characterized in that, The lens structure also includes a plurality of second lenses arranged in an array on the curved surface of the first lens.

7. The splicing display screen according to claim 6, characterized in that, The adjacent second lens abuts.

8. The splicing display screen according to claim 6 or 7, characterized in that, The array of the plurality of second lenses is arranged in a rhomboid, hexagonal, or rectangular pattern on the curved surface of the first lens.

9. The splicing display screen according to claim 6 or 7, characterized in that, The side of the second lens furthest from the first lens is a convex curved surface, while the side closest to the first lens is a flat surface.

10. The splicing display screen according to claim 9, characterized in that, The convex surface of the second lens is spherical.

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