A seamless splicing display system

Abstract

A seamless splicing display system includes a display body composed of at least two displays spliced ​​together, with a splicing gap between adjacent displays. The system is characterized by further including a gap-eliminating device arranged along the splicing gap to visually eliminate the gap. This gap-eliminating device includes a beam-splitting module and a stretching offset module. A splicing line is defined in the width direction of the splicing gap. The beam-splitting module can separate a second image and a fourth image that cover the splicing gap, as well as a first image and a third image whose positions remain unchanged. The stretching offset module causes the second image to overlap or substantially overlap with the first image, and the fourth image to overlap or substantially overlap with the third image. This effectively covers the splicing gap without causing ghosting, local blurring, or uneven local brightness.

Description

Technical Field

[0001] This invention relates to a seamless splicing display system. Background Technology

[0002] Chinese patent document CN116469319A discloses a seamless splicing display system and a light shifting device. The seamless splicing display system includes a display body composed of at least two display screens spliced ​​together, with a splicing gap formed between adjacent display screens. The system is characterized by further including an optical component disposed directly in front of at least one display screen. This optical component includes a first prism and a second prism. The first prism has an incident surface and a first refractive surface, with the first refractive surface inclined relative to the incident surface. The second prism has an exit surface and a second refractive surface, with the second refractive surface inclined relative to the exit surface. The first and second refractive surfaces are arranged parallel and spaced apart, with the exit surface parallel to the incident surface. The first and second prisms have the same refractive index. The incident surface is arranged opposite to the display surface of the display screen. The display light from the display screen passes sequentially through the incident surface, the first refractive surface, the second refractive surface, and the exit surface, causing the displayed image on the display screen to shift and block the splicing gap.

[0003] However, although this solution avoids image distortion by shifting the entire displayed image towards the seam to cover it, the seam does not disappear but is shifted to an invisible position. When viewed from a wider angle, the seam is still visible. Summary of the Invention

[0004] To address the shortcomings of existing seamless display splicing solutions, the present invention aims to provide a seamless splicing display system that does not show any splicing gaps when viewed from a wide viewing angle.

[0005] The objective of this invention is achieved through the following techniques:

[0006] A seamless splicing display system includes a display body composed of at least two displays spliced ​​together, with a splicing gap between adjacent displays. The system is characterized by further including a gap-eliminating device arranged along the splicing gap to visually eliminate the gap. The gap-eliminating device includes a beam splitting module and a stretching offset module, and defines a splicing line in the width direction of the splicing gap.

[0007] The beam splitting module is used to divide the first image to be split on the first side of the adjacent splicing seam into a first image and a second image with the same image, the position of the first image remains unchanged, and the second image is shifted to the second side of the adjacent splicing seam; and to divide the second image to be split on the second side of the adjacent splicing seam into a third image and a fourth image with the same image, the position of the third image remains unchanged, and the fourth image is shifted to the first side of the adjacent splicing seam, and the other side of the second image is adjacent to or close to the other side of the fourth image;

[0008] The stretching and offset module includes a first prism module and a second prism module arranged adjacent to each other on both sides of the splicing line. The first prism module is used to stretch and offset the first original image, the first image, and the fourth image adjacent to the first image to be split toward the second side of the splicing gap, so that one side of the fourth image is adjacent to the splicing line and the other side is adjacent to or close to the second side of the splicing gap. The second prism module is used to stretch and offset the second original image, the third image, and the second image adjacent to the second image to be split toward the first side of the splicing gap, so that one side of the second image is adjacent to the splicing line and the other side is adjacent to or close to the first side of the splicing gap, thereby making the second image overlap or approximately overlap with the first image, and the fourth image overlap or approximately overlap with the third image. In this way, the beam splitting module can separate the second and fourth images that cover the splicing gap, as well as the first and third images that remain in the same position. The stretching and offset module makes the second image overlap or approximately overlap with the first image, and the fourth image overlap or approximately overlap with the third image. This can cover the splicing gap without producing problems such as ghosting, local blurring, and local brightness imbalance.

[0009] The beam splitting module includes a first beam splitter and a second beam splitter. The first beam splitter has a first inclined surface and a second inclined surface, and the second beam splitter has a third inclined surface and a fourth inclined surface. The orthographic projection of the first inclined surface onto the display body coincides with the first image to be split, and the second inclined surface is correspondingly set with the second image. Part of the light from the first image to be split passes through the first inclined surface to form the first image, and the remaining light from the first image to be split is reflected by the first and second inclined surfaces in sequence to form the second image. The orthographic projection of the third inclined surface onto the display body coincides with the second image to be split, and the fourth inclined surface is correspondingly set with the fourth image. Part of the light from the second image to be split passes through the third inclined surface to form the third image, and the remaining light from the second image to be split is reflected by the third and fourth inclined surfaces in sequence to form the fourth image.

[0010] The first inclined surface is partially coated with a reflective coating so that light rays from the first segmented image partially penetrate and partially reflect, or the inclination angle of the first inclined surface is set such that light rays from the first segmented image partially penetrate and partially reflect; the third inclined surface is partially coated with a reflective coating so that light rays from the second segmented image partially penetrate and partially reflect, or the inclination angle of the third inclined surface is set such that light rays from the second segmented image partially penetrate and partially reflect; the second inclined surface is coated with a reflective coating, or the inclination angle of the second inclined surface is set such that light rays from the remaining first segmented image reflect; and the fourth inclined surface is coated with a reflective coating, or the inclination angle of the fourth inclined surface is set such that light rays from the remaining second segmented image reflect.

[0011] The first inclined plane and the second inclined plane are arranged in parallel and opposite directions, and the third inclined plane and the fourth inclined plane are arranged in parallel and opposite directions. The inclination angle of the first inclined plane, the second inclined plane, the third inclined plane and the fourth inclined plane relative to the horizontal plane is 40-50 degrees.

[0012] The sum of the widths of the first and second subdivided images is equal to or approximately equal to the width of the stitching gap. The sum of the widths of the first and second original images is 3-12 times the width of the stitching gap. In this way, the second and fourth images can be stretched and offset to just cover the stitching gap. The width settings of the first and second original images can prevent the stretched and offset images of the stretched and offset modules from being excessively distorted.

[0013] The first prism module and / or the second prism module include a first prism having a horizontal plane and an inclined plane arranged opposite to each other, the inclined plane causing the image to be stretched and offset along a direction perpendicular to the stitching line;

[0014] Alternatively, the first prism module and / or the second prism module may include a second prism having two symmetrically distributed inclined surfaces that cause the image to be stretched and offset along a direction perpendicular to the stitching line.

[0015] Alternatively, the first prism module and / or the second prism module may include a microprism group, which includes a plurality of microprisms closely arranged along a direction perpendicular to the splicing seam. The microprisms have horizontal and inclined surfaces arranged opposite to each other. The inclined surfaces of the microprisms cause the image to be stretched and shifted along a direction perpendicular to the splicing line. The inclination angle of the inclined surfaces of the plurality of microprisms in the microprism group gradually increases toward the splicing line.

[0016] Alternatively, the first prism module and / or the second prism module may include a third prism having a horizontal plane and an elliptical arc surface arranged opposite to each other.

[0017] Alternatively, the first prism module and / or the second prism module may include a fourth prism, which has two symmetrically distributed elliptical arc surfaces.

[0018] Alternatively, the first prism module and / or the second prism module may include at least two fifth prisms arranged opposite each other in a direction perpendicular to the display surface of the display body. The fifth prisms have opposing horizontal planes and elliptical arc surfaces, and the elliptical arc surfaces of the fifth prisms cause the image to be stretched and offset in a direction perpendicular to the splicing line.

[0019] The tilt angle of the first prism's tilted surface is 5-25 degrees, the tilt angle of the second prism is 5-15 degrees, the elliptical eccentricity of the third prism is >0.9, and the elliptical eccentricity of the fourth prism is >0.9; the tilt angle of the tilted surfaces of the multiple microprisms is a minimum of 0-1 degrees and a maximum of 5-25 degrees; the elliptical arc surface is modulated by numerous tilted surfaces of the microprisms, and the elliptical eccentricity is >0.9.

[0020] The minimum distance between the first prism and the display body is 0-5mm, and the maximum thickness of the first prism is 18-25mm; the minimum distance between the microprism group and the display body is 5-20mm, and the maximum thickness of the microprism group is 2-8mm.

[0021] The splicing line is set at the midpoint or off-center of the splicing gap width.

[0022] The first prism module and / or the second prism module are made of transparent polymer or glass. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram illustrating the working principle of Embodiment 1 of the present invention.

[0025] Figure 2 This is a schematic diagram illustrating the working principle of the beam splitting module in Example 1.

[0026] Figure 3 This is a schematic diagram illustrating the working principle of the inclined prism light deflection in the stretching offset module of Example 1.

[0027] Figure 4 This is a schematic diagram illustrating the working principle of the inclined prism light deflection in the stretching offset module of Example 1.

[0028] Figure 5 for Figure 4 A magnified view of a portion of the image.

[0029] Figure 6 This is a schematic diagram of the stretching and offset direction of the first prism module in Embodiment 1.

[0030] Figure 7 This is a schematic diagram of the stretching and offset direction of the second prism module in Embodiment 1.

[0031] Figure 8 This is a schematic diagram illustrating the working principle of the stretch offset module in Example 1.

[0032] Figure 9 This is a schematic diagram illustrating the operation of the first implementation of the stretch offset module in Example 1.

[0033] Figure 10This is a schematic diagram illustrating the second implementation of the stretch offset module in Example 1.

[0034] Figure 11 This is a schematic diagram illustrating the third implementation of the stretch offset module in Example 1.

[0035] Figure 12 This is a schematic diagram illustrating the fourth implementation of the stretch offset module in Example 1.

[0036] Figure 13 This is a schematic diagram illustrating the fifth implementation of the stretch offset module in Example 1.

[0037] Figure 14 This is a schematic diagram illustrating the sixth implementation of the stretch offset module in Example 1.

[0038] Figure 15 This is a schematic diagram illustrating the working principle of Example 2.

[0039] Figure 16 This is a schematic diagram illustrating the working principle of Example 3. Detailed Implementation

[0040] Example 1, refer to Figures 1 to 14 As shown, a seamless splicing display system includes a display body composed of at least two displays spliced ​​together, with a splicing gap 1 between adjacent displays, and further includes a gap-reducing device arranged along the splicing gap 1 to visually eliminate the splicing gap 1, such as... Figure 1 and Figure 2 As shown, the seam elimination device includes a beam splitting module A and a stretching offset module B, and defines a splicing line 11 in the width direction of the splicing gap 1. The splicing line 11 is located at the midpoint of the width of the splicing gap 1.

[0041] The beam splitting module A is used to split the first image 3 on the first side 12 of the adjacent splicing seam 1 into a first image 31 and a second image 32 with the same image. The position of the first image 31 remains unchanged, and the second image 32 is shifted to the adjacent splicing line 11 on one side and the second side 13 of the adjacent splicing seam 1 on the other side. The module A is also used to split the second image 5 on the second side 13 of the adjacent splicing seam 1 into a third image 51 and a fourth image 52 with the same image. The position of the third image 51 remains unchanged, and the fourth image 52 is shifted to the adjacent splicing line 11 on one side and the first side 12 of the adjacent splicing seam 1 on the other side. Beam-splitter module A includes a first beam splitter A1 and a second beam splitter A2. Both beam splitters A1 and A2 are parallelogram-shaped optical lenses of the same shape and size. The second beam splitter A2 is positioned above the first beam splitter A1, with its bottom edge fitting against half of the top edge of the first beam splitter A1. The first beam splitter A1 has a first inclined surface A11 and a second inclined surface A12, and the second beam splitter A2 has a third inclined surface A21 and a fourth inclined surface A22. The first inclined surface A11 and the second inclined surface A12 interact... The two hypotenuses of the parallelogram are arranged parallel to each other. The third hypotenuse A21 and the fourth hypotenuse A22 are arranged similarly. The hypotenuses of the first beam splitter A1 and the second beam splitter A2 are arranged in opposite directions. The orthographic projection of the first hypotenuse A11 onto the display body coincides with the first image 3. The second hypotenuse A12 is correspondingly arranged with the second image 32. Part of the light from the first image 3 passes through the first hypotenuse A11 to form the first image 31. The remaining light from the first image 3 is reflected sequentially by the first hypotenuse A11 and the second hypotenuse A12. A second image 32 is formed; the orthographic projection of the third inclined plane A21 on the display body coincides with the second subdivided image 5, and the fourth inclined plane A22 is correspondingly set with the fourth image 52. Part of the light from the second subdivided image 5 passes through the third inclined plane A21 to form the third image 51. The remaining light from the second subdivided image 5 is reflected by the third inclined plane A21 and the fourth inclined plane A22 in sequence to form the fourth image 52. The first image 31 and the second image 32 are visually identical. Similarly, the third image 51 and the fourth image 52 are similar. By setting the inclined plane structure, not only can the user see the image displayed on the display body, but the image can also be reflected to cover the splicing gap 1. The tilt angle of the first inclined plane A11, the second inclined plane A12, the third inclined plane A21 and the fourth inclined plane A22 relative to the horizontal plane is set to 40-50 degrees. The 40-50 degree range is the preferred angle to achieve the purpose of this invention. In this way, the first subdivided image 3 and the second subdivided image 5 can achieve a relatively balanced state between light passing through the inclined plane and being reflected by the inclined plane.

[0042] A coating can be applied to the first inclined surface A11, the second inclined surface A12, the third inclined surface A21, and the fourth inclined surface A22 to allow image light to partially penetrate and partially reflect. Alternatively, the tilt angles of the first inclined surface A11, the second inclined surface A12, the third inclined surface A21, and the fourth inclined surface A22 can be set to allow image light to partially penetrate and partially reflect. Specifically, the following combinations are possible: a reflective coating is partially applied to the first inclined surface A11 to allow partial penetration and partial reflection of the first image to be segmented; or, the tilt angle of the first inclined surface A11 is set to allow partial penetration and partial reflection of the first image to be segmented. Image 3 partially penetrates and partially reflects; and a reflective coating is partially provided on the third inclined surface A21 so that a portion of the second segmented image 5 penetrates and partially reflects, or the tilt angle of the third inclined surface A21 is set so that a portion of the second segmented image 5 penetrates and partially reflects; and a reflective coating is provided on the second inclined surface A12, or the tilt angle of the second inclined surface A12 is set so that the remaining first segmented image 3 reflects; and a reflective coating is provided on the fourth inclined surface A22, or the tilt angle of the fourth inclined surface A22 is set so that the remaining second segmented image 5 reflects.

[0043] The stretch offset module B includes a first prism module BL and a second prism module BR, which are respectively located on both sides of the splicing line 11 and arranged adjacent to each other. Figure 6 As shown, the first prism module BL is used to stretch and offset the first original image 2, the first image 31, and the fourth image 52 adjacent to the first segmented image 3 towards the second side 13 of the stitching gap 1, so that one side of the first image 31 is adjacent to the stitching line 11 and the other side is adjacent to the first side 12 of the stitching gap 1, and one side of the fourth image 52 is adjacent to the stitching line 11 and the other side is adjacent to the second side 13 of the stitching gap 1; as shown Figure 7 As shown, the second prism module BR is used to stretch and offset the second original image 4, the third image 51, and the second image 32 adjacent to the second segmented image 5 towards the first side 12 of the stitching gap 1, so that one side of the third image 51 is adjacent to the stitching line 11 and the other side is adjacent to the second side 13 of the stitching gap 1, and one side of the second image 32 is adjacent to the stitching line 11 and the other side is adjacent to the first side 12 of the stitching gap 1, thereby causing the second image 32 to overlap or substantially overlap with the first image 31, and causing the fourth image 52 to overlap or substantially overlap with the third image 51, as shown. Figure 8 As shown, the beam splitting module A can separate the second image 32 and the fourth image 52, which cover the splicing gap 1, as well as the first image 31 and the third image 51, which remain in the same position. The stretching and offset module B makes the second image 32 overlap with the first image 31, and the fourth image 52 overlap with the third image 51. From the front view, the first image 31 and the third image 51 can be seen spliced ​​together. From the side view, the first image 31 and the fourth image 52 or the third image 51 and the second image 32 can be seen spliced ​​together. This can cover the splicing gap 1 without producing problems such as ghosting, local blurring, and local brightness imbalance, and can cope with various occasions.

[0044] The derivation of the formula for stretching and offsetting the light rays from the downsloping prism mirror surface in stretching and offset module B is as follows: Figure 3 As shown, assume the light-emitting point of the display subject is D, the point on the slope mirror of the prism directly incident on the light ray is E, the point on the slope mirror of the prism obliquely incident on the light ray is B, the point on the plane perpendicular to the light-emitting point corresponding to point B is A, the point on the display subject plane perpendicular to point B is C, and the starting point of the prism slope mirror is O. h1 + h2 = h, the light stretching offset is...

[0045] According to Snell's law, n1sinθ1=n2sinθ2, assuming n2 is the air medium, θ2 is the angle of incidence of normal 1, θ1 is the angle of refraction of normal 1, n1 is the refractive index of the prism medium, and the angle of refraction θ1=prism angle θ1, so n2=1, sinθ2=n1sinθ1, θ2=asin(n1sinθ1), θ2-θ1=θ3, θ3=asin(n1sinθ1)-θ1.

[0046] w*tanθ1=h1, h2 = h - h1, (h-h1)*tanθ3=d, stretching offset formula: d=h2*tan[asin(n1sinθ1)-θ1].

[0047] The derivation of the formula for stretching and offsetting the light rays from the upward-sloping prism mirror surface in stretching and offset module B is as follows: Figure 4 and Figure 5 As shown, assume the light-emitting point of the display subject is E, the point where the emitted light rays are directly incident on the prism plane is D, the point where the light rays are obliquely incident on the prism plane is C, the light-emitting point corresponding to point C on the prism slope mirror is A, the point corresponding to the prism plane perpendicular to A is B, the point corresponding to the display subject plane is F, and the starting point of the prism slope mirror is O. The light stretch offset is

[0048] According to Snell's law, n1sinθ1=n2sinθ2. Assuming n1 is the refractive index of the prism medium, θ1 is the angle of incidence of the refracted light with normal 1, n2 is the air medium, θ2 is the angle of refraction of normal 1 at point A, θ3 is the angle of refraction of normal 2 at point C, and θ4 is the angle of incidence of normal 2 at point C, θ1+θ3=θ2 (∠CAB and θ3 are parallel lines with equal alternate angles), θ2=prism slope angle, so n2=1, n1sinθ1=sinθ2, sinθ1=sinθ2 / n1, θ1=asin(sinθ2 / n1). θ2-θ1=θ3,θ3=θ2-asin(sinθ2 / n1),n1sinθ3=n2sinθ4,sinθ4=n1*sin[θ2-asin(sinθ2 / n1)],θ4=asin{n1*sin[θ2-asin(sinθ2 / n1)]},the angle ∠E between θ4 and the display subject's straight and oblique light emission is equal to the angle between parallel lines.

[0049] d = h' * tanθ3 + h * tanθ4. The stretching offset formula is d = h' * tan[θ2 - asin(sinθ2 / n1)] + h * tan(asin{n1 * sin[θ2 - asin(sinθ2 / n1)]}).

[0050] In this embodiment, the stitching line 11 is located on the center line 14 of the stitching gap 1. The sum of the widths of the first segmented image 3 and the second segmented image 5 is equal to the width of the stitching gap 1. Specifically, the first segmented image 3 and the second segmented image 5 are each half the width of the stitching gap 1. The sum of the widths of the first original image 2 and the second original image 4 is 3-12 times the width of the stitching gap 1. When the sum of the widths of the first original image 2 and the second original image 4 is 3 times the width of the stitching gap 1, the cost of the stretching offset module B is low, and the stretched and offset image will not have any distortion affecting vision. When the widths of the first original image 2 and the second original image 4 are 12 times the width of the stitching gap 1, the stretched and offset image will hardly produce any distortion, but the cost of the stretching offset module B will increase. In this embodiment, the first prism module BL and the second prism module BR have the same parameters and are symmetrical about the stitching line 11. The first prism module BL and the second prism module BR have the following multiple implementations:

[0051] In the first implementation, the first prism module BL and the second prism module BR adopt a downward-sloping first prism B1, such as... Figure 9As shown, the first prism B1 has a horizontal plane and an inclined plane arranged opposite to each other. The inclined plane causes the image to be stretched and shifted along the direction of the vertical splicing line 11. The maximum thickness of the first prism B1 is 18-25mm. This embodiment uses an 18mm first prism B1, which can achieve the stretching and shifting effect well and also save some costs. The minimum distance between the first prism B1 and the display body is 0-5mm. In this embodiment, the distance is 5mm. The tilt angle of the inclined plane of the first prism B1 is 5-25 degrees. In this embodiment, it is specifically set to 25 degrees. The larger the angle, the stronger the stretching and shifting effect of the first prism B1, but the resulting image distortion will be slightly larger. If it is set to 5 degrees, the stretching and shifting effect is poor, but the image will hardly be distorted.

[0052] The second implementation method uses an upward-sloping first prism module BL and a downward-sloping second prism B2, as shown in the example. Figure 10 As shown, the second prism B2 has two symmetrically distributed inclined surfaces. The inclined surfaces cause the image to be stretched and offset along the direction of the vertical splicing line 11. Setting up double inclined surfaces can improve the efficiency of the stretching offset and reduce the optical path. The tilt angle of the inclined surfaces of the second prism B2 is 5-15 degrees, and in this embodiment it is 5 degrees.

[0053] The third implementation method uses a downward-sloping microprism group B3 for the first prism module BL and the second prism module BR. Figure 11 As shown, the microprism group B3 includes multiple microprisms closely arranged along the direction perpendicular to the splicing seam 1. The microprisms have horizontal and inclined surfaces arranged opposite each other. The inclined surfaces of the microprisms cause the image to be stretched and shifted along the direction perpendicular to the splicing line 11. The tilt angle of the inclined surfaces of the multiple microprisms in the microprism group B3 gradually increases towards the splicing line 11. The minimum distance between the microprism group B3 and the display body is 12-18mm, specifically 12mm in this embodiment, which can reduce the optical path to a certain extent. The maximum thickness of the microprism group B3 is 2-8mm, and 8mm is used in this embodiment. The minimum tilt angle of the inclined surfaces of the multiple microprisms is 0-1 degree, and the maximum is 5-25 degrees. The size of the tilt angle increases from both sides towards the splicing seam 1.

[0054] The fourth implementation method uses a downward-sloping third prism B4 for the first prism module BL and the second prism module BR, such as... Figure 12 As shown, the third prism B4 has a horizontal plane and an elliptical arc surface arranged opposite each other, and the eccentricity of the ellipse of the third prism B4 is >0.9;

[0055] The fifth implementation involves the first prism module BL and the second prism module BR employing an upward-sloping combined with a downward-sloping fourth prism B5, as shown below. Figure 13As shown, the fourth prism B5 has two symmetrically distributed elliptical arc surfaces. The eccentricity of the ellipse of the fourth prism B5 is >0.9. Setting two symmetrical elliptical arc surfaces can also improve the efficiency of stretching offset and reduce the optical path.

[0056] The sixth implementation method uses two downward-sloping fifth prisms B6 in the first prism module BL and the second prism module BR, such as... Figure 14 As shown, the fifth prism B6 has a horizontal plane and an elliptical arc surface arranged opposite each other. The elliptical arc surface of the fifth prism B6 causes the image to be stretched and offset along the direction of the vertical splicing line 11. Similarly to the fifth embodiment, the sixth embodiment also has two opposite elliptical arc surfaces, which can improve the efficiency of the stretching offset and reduce the optical path between the display screen and the fifth prism B6.

[0057] All of the aforementioned prisms can be made of transparent polymers or glass materials, such as PMMA, PC, and K9 glass. These products offer high cost-effectiveness and are highly competitive in the market. Furthermore, according to the formula for light stretching and shifting, a prism module requires a 20mm optical path for one light shift. A single-layer prism module needs to maintain a 20mm optical path with the display screen. However, if a double-layer prism module is used, the 20mm optical path can be split into two optical paths of 8mm and 12mm respectively, which are 8mm and 12mm away from the display screen, thus achieving the same light shift as a 20mm optical path. Therefore, the double-layer prism module reduces the distance between the prism module and the display screen, simplifying the product size.

[0058] Example 2, refer to Figure 15 As shown, this embodiment is basically the same as embodiment one, with the main difference being that: the splicing line 11 is offset from the center line 14 of the splicing gap 1. In order to completely cover the splicing gap 1, the sum of the widths of the first subdivided image 3 and the second subdivided image 5 is equal to the width of the splicing gap 1. However, in this embodiment, the width of the first image 31 is different from the width of the third image 51. In order to completely cover the splicing gap 1, the stretching offset of the first prism module BL and the second prism module BR on both sides is different.

[0059] Example 3, refer to Figure 16 As shown, this embodiment is basically the same as embodiment one, with the main difference being: the second image 32 is offset to one side adjacent to the second side edge 13, and the other side close to the splicing line 11, specifically allowing a certain distance between the other side edge of the second image 32 and the splicing line 11; the fourth image 52 is offset to one side adjacent to the first side edge 12, and the other side close to the splicing line 11, specifically allowing a certain distance between the other side edge of the fourth image 52 and the splicing line 11.

[0060] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present invention should still fall within the scope of the patent of the present invention.

Claims

1. A seamless splicing display system, comprising a display body composed of at least two display screens spliced ​​together, wherein there is a splicing gap between adjacent display screens, characterized in that: It also includes a seam-eliminating device arranged along the seam to visually eliminate the seam, the seam-eliminating device comprising a beam-splitting module and a stretch offset module, defining a seam line in the width direction of the seam; The beam splitting module is used to split a first image on the first side of the adjacent splicing seam into a first image and a second image with the same image frame. The position of the first image remains unchanged, and the second image is shifted to the second side of the adjacent splicing seam. The module also splits the second image on the second side of the adjacent splicing seam into a third image and a fourth image with the same image frame. The position of the third image remains unchanged, and the fourth image is shifted to the first side of the adjacent splicing seam. The other side of the second image is adjacent to or close to the other side of the fourth image. The stretching and offsetting module includes a first prism module and a second prism module arranged adjacent to each other on both sides of the splicing line. The prism module is used to stretch and offset the first original image, the first image, and the fourth image adjacent to the first segmented image toward the second side of the stitching gap, so that one side of the fourth image is adjacent to the stitching line and the other side is adjacent to or close to the second side of the stitching gap; the second prism module is used to stretch and offset the second original image, the third image, and the second image adjacent to the second segmented image toward the first side of the stitching gap, so that one side of the second image is adjacent to the stitching line and the other side is adjacent to or close to the first side of the stitching gap, thereby making the second image overlap or substantially overlap with the first image, and making the fourth image overlap or substantially overlap with the third image.

2. The seamless splicing display system according to claim 1, characterized in that: The beam splitting module includes a first beam splitter and a second beam splitter. The first beam splitter has a first inclined surface and a second inclined surface, and the second beam splitter has a third inclined surface and a fourth inclined surface. The orthographic projection of the first inclined surface on the display body coincides with the first image to be split, and the second inclined surface is correspondingly set with the second image. Part of the light from the first image to be split passes through the first inclined surface to form the first image, and the remaining light from the first image to be split is reflected by the first inclined surface and the second inclined surface in sequence to form the second image. The orthographic projection of the third inclined plane onto the display body coincides with the second subdivided image. The fourth inclined plane is set correspondingly to the fourth image. Part of the light from the second subdivided image passes through the third inclined plane to form the third image. The remaining light from the second subdivided image is reflected by the third and fourth inclined planes in sequence to form the fourth image.

3. The seamless splicing display system according to claim 2, characterized in that: The first inclined surface is partially provided with a reflective coating so that the light rays of the first image being segmented partially penetrate and partially reflect; or, the inclination angle of the first inclined surface is set so that the light rays of the first image being segmented partially penetrate and partially reflect. And the third inclined surface is partially provided with a reflective coating so that the light rays of the second image being divided are partially reflected after passing through it; or, the inclination angle of the third inclined surface is set so that the light rays of the second image being divided are partially reflected after passing through it. And the second inclined surface is provided with a reflective coating, or the tilt angle of the second inclined surface is set to reflect the remaining light of the first segmented image; The fourth inclined surface is provided with a reflective coating, or the inclination angle of the fourth inclined surface is set to reflect the remaining light of the second segmented image.

4. A seamless splicing display system according to claim 3, characterized in that: The first inclined plane and the second inclined plane are arranged in parallel and opposite directions, and the third inclined plane and the fourth inclined plane are arranged in parallel and opposite directions. The inclination angle of the first inclined plane, the second inclined plane, the third inclined plane and the fourth inclined plane relative to the horizontal plane is 40-50 degrees.

5. A seamless splicing display system according to claim 1, characterized in that: The sum of the widths of the first segmented image and the second segmented image is equal to or approximately equal to the width of the stitching gap, and the sum of the widths of the first original image and the second original image is 3-12 times the width of the stitching gap.

6. A seamless splicing display system according to any one of claims 1 to 5, characterized in that: The first prism module and / or the second prism module include a first prism having a horizontal plane and an inclined plane arranged opposite to each other, the inclined plane causing the image to be stretched and shifted along a direction perpendicular to the stitching line; or, the first prism module and / or the second prism module include a second prism having two symmetrically distributed inclined planes, the inclined plane causing the image to be stretched and shifted along a direction perpendicular to the stitching line; or, the first prism module and / or the second prism module include a microprism group, the microprism group including a plurality of microprisms closely arranged along a direction perpendicular to the stitching gap, the microprisms having a horizontal plane and an inclined plane arranged opposite to each other, the inclined plane of the microprism causing the image to be stretched and shifted along a direction perpendicular to the stitching line. The image is stretched and shifted along the splicing line by the tilt angle of the tilted surfaces of the multiple microprisms in the microprism group gradually increasing. Alternatively, the first prism module and / or the second prism module includes a third prism with a horizontal plane and an elliptical arc surface arranged opposite each other. Alternatively, the first prism module and / or the second prism module includes a fourth prism with two symmetrically distributed elliptical arc surfaces. Alternatively, the first prism module and / or the second prism module includes at least two fifth prisms arranged opposite each other along a direction perpendicular to the display surface of the display body. The fifth prisms have a horizontal plane and an elliptical arc surface arranged opposite each other, and the elliptical arc surface of the fifth prism causes the image to be stretched and shifted along the direction perpendicular to the splicing line.

7. A seamless splicing display system according to claim 6, characterized in that: The tilt angle of the first prism tilted surface is 5-25 degrees, the tilt angle of the second prism tilted surface is 5-15 degrees, the elliptical eccentricity of the third prism is >0.9, and the elliptical eccentricity of the fourth prism is >0.9; the tilt angle of the tilted surfaces of the multiple microprisms is at least 0-1 degrees and at most 5-25 degrees; the elliptical arc surface is modulated by the tilted surfaces of countless microprisms, and the elliptical eccentricity is >0.

9.

8. A seamless splicing display system according to claim 6, characterized in that: The minimum distance between the first prism and the display body is 0-5mm, and the maximum thickness of the first prism is 18-25mm; the minimum distance between the microprism group and the display body is 5-20mm, and the maximum thickness of the microprism group is 2-8mm.

9. A seamless splicing display system according to any one of claims 1 to 5, characterized in that: The splicing line is set at the midpoint or off-center of the splicing gap width.

10. A seamless splicing display system according to any one of claims 1 to 5, characterized in that: The first prism module and / or the second prism module are made of transparent polymer or glass.

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