Patent Publication Number: US-2023140296-A1

Title: Optical splicing structure, manufacturing method thereof and splicing display device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Chinese Patent Application No. 202111266989.7, filed on Oct. 29, 2021, the entire contents of which are incorporated herein by reference. 
     TECHNICAL FIELD 
     The present application relates to the field of splicing display technology, and in particular to an optical splicing structure, a manufacturing method thereof and a splicing display device. 
     BACKGROUND 
     Currently, the splicing display industry is booming to achieve a larger display area. Understandably, the splicing screen is made of at least two displays by physical splicing, because each display is independent, with its own independent plastic sealing, the display device of flat display panel can only achieve narrower border, but difficultly achieve seamless splicing, and the display device of curved display is also difficult to avoid the concave and black boarder of splicing. 
     SUMMARY 
     The main purpose of the present application is to provide an optical splicing structure, by transmitting the display light of the display panel to a splice gap between two display panels, where the display of the screen can be achieved, to solve the problem of concave and black boarder at the splice position of the splicing display panels, to achieve seamless splicing. 
     In order to achieve the above purpose, the present application provides an optical splicing structure, applied to a splicing display device, the splicing display device including at least two display panels, the optical splicing structure being provided at a splice position of two display panels, wherein the optical splicing structure includes: 
     a plastic sealing body including an incident end and a light emitting end opposite to the incident end; 
     an optical fiber bundle including a plurality of optical fiber lines distributed within the plastic sealing body; and 
     wherein the plurality of the optical fiber lines extend in an extension direction from the incident end to the light emitting end and arranged in a direction perpendicular to the extension direction from the incident end to the light emitting end. 
     In an embodiment, the plastic sealing body includes a main body and opaque particles filled within the main body. 
     In an embodiment, the optical fiber lines are made of glass or organic fibers; and/or, 
     the main body is made of acrylonitrile-butadiene-styrene plastic, UV-curable ink, polymethyl methacrylate or polycarbonate; and/or, 
     the opaque particles are made of carbon black. 
     In an embodiment, the optical fiber line is curved in the extension direction, an end of the optical fiber line at the incident end is perpendicular to an outer surface of the incident end, and the end of the optical fiber line at the light emitting end is perpendicular to a surface of the light emitting end. 
     In an embodiment, the incident end includes an incident portion and a fixing portion; 
     two incident portions are provided on two sides of the fixing portion respectively, each incident portion is provided in a concave arc; or, 
     the fixing portion and the incident portion are arranged in the direction from the light emitting end to the incident end, the fixing portion is provided with two fixing slots that are away from each other, a line for connecting the two fixing slots is perpendicular to the direction from the light emitting end to the incident end, and a surface of the incident portion away from the fixing portion is flat. 
     In an embodiment, the plurality of the optical fiber lines are symmetrical about a midline in a direction of their arrangement. 
     In an embodiment, the optical fiber line comprises a fiber core, a cladding layer and a coating layer provided in sequence from inside to outside, and the coating layer is a light sparse material. 
     The present application also provides a method for manufacturing an optical splicing structure, including: 
     suspending a plurality of optical fiber lines above a mold and laying the optical fiber lines along an inner wall surface of the mold; 
     filling the mold with a plastic sealing liquid and curing into a plastic sealing body; and 
     cutting into the optical splicing structure. 
     The present application also provides a splicing display device, includes at least two display panels and the optical splicing structure, wherein the optical splicing structure is located at a splice position of two adjacent display panels, the light emitting end covers at least a non-display area of two display panels, wherein the optical splicing structure includes: 
     a plastic sealing body including an incident end and a light emitting end opposite to the incident end; 
     an optical fiber bundle including a plurality of optical fiber lines distributed within the plastic sealing body; and 
     wherein the plurality of the optical fiber lines extend in an extension direction from the incident end to the light emitting end and arranged in a direction perpendicular to the extension direction from the incident end to the light emitting end. 
     In an embodiment, the splicing display device further includes a support assembly, the support assembly is provided on a surface of the display panel away from the light emitting end, the incident end passes through the two display panels to fixedly connect to the support assembly. 
     In an embodiment, the plastic sealing body includes a main body and opaque particles filled within the main body. 
     In an embodiment, the optical fiber lines are made of glass or organic fibers; and/or, 
     the main body is made of acrylonitrile-butadiene-styrene plastic, UV-curable ink, polymethyl methacrylate or polycarbonate; and/or, 
     the opaque particles are made of carbon black. 
     In an embodiment, the optical fiber line is curved in the extension direction, an end of the optical fiber line at the incident end is perpendicular to an outer surface of the incident end, and the end of the optical fiber line at the light emitting end is perpendicular to a surface of the light emitting end. 
     In an embodiment, the incident end includes an incident portion and a fixing portion; 
     two incident portions are provided on two sides of the fixing portion respectively, each incident portion is provided in a concave arc; or, 
     the fixing portion and the incident portion are arranged in the direction from the light emitting end to the incident end, the fixing portion is provided with two fixing slots that are away from each other, a line for connecting the two fixing slots is perpendicular to the direction from the light emitting end to the incident end, and a surface of the incident portion away from the fixing portion is flat. 
     In an embodiment, the plurality of the optical fiber lines are symmetrical about a midline in a direction of their arrangement. 
     In the technical solution of the present application, the optical splicing structure includes a plastic sealing body and an optical fiber bundle, a plurality of optical fiber lines of the optical fiber bundle are distributed within the plastic sealing body, the plastic sealing body provides a fixed base to enable the optical fiber lines to have a specific extension direction, i.e., a specific optical route. The plurality of optical fiber lines extend in an extension direction from the incident end to the light emitting end, which can receive the light from the incident end and transmit the light to the light emitting end, and are distributed perpendicular to the direction from the incident end to the light emitting end, i.e., in the direction of horizontally connecting two display panels, so that the light emitting end also forms a certain display screen, which can cover the black edge or concave at the splice position of two display panels, to achieve seamless splicing. The optical fiber line has low loss in optical transmission, which can effectively ensure the display screen at the light emitting end to improve the effect of seamless splicing. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following briefly introduces the drawings in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. Those skilled in the art, other drawings can also be obtained based on the structures shown in these drawings without any creative effort. 
         FIG.  1    is a first top view of an optical splicing structure according to an embodiment of the present application. 
         FIG.  2    is a sectional view along line A-A in  FIG.  1   . 
         FIG.  3    is a second top view of the optical splicing structure according to the embodiment of the present application. 
         FIG.  4    is a cross-sectional view along line B-B in  FIG.  3   . 
         FIG.  5    is a schematic structural view of the optical fiber line in the optical splicing structure according to the embodiment of the present application. 
         FIG.  6    is a flowchart of a method for manufacturing an optical splicing structure according to the embodiment of the present application. 
         FIG.  7    is a schematic structural view of the optical splicing structure in the step S 1  in the flowchart shown in  FIG.  6   . 
         FIG.  8    is a schematic structural view of the optical splicing structure in the step S 2  in the flowchart shown in  FIG.  6   . 
         FIG.  9    is a schematic structural view of the optical splicing structure in complementary state after the step S 2  in the flowchart shown in  FIG.  6   . 
         FIG.  10    is a first top view of the splicing display device according to the embodiment of the present application. 
         FIG.  11    is a cross-sectional view along line C-C in  FIG.  10   . 
         FIG.  12    is a second top view of the splicing display device according to the embodiment of the present application. 
         FIG.  13    is a cross-sectional view along line D-D in  FIG.  12   . 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application. 
     It should be noted that if there is a directional indication (such as up, down, left, right, front, rear ⋅ ⋅ ⋅ ) in the embodiments of the present application, the directional indication is only used to explain the relative positional relationship, movement, etc. of the components in a certain posture (as shown in the drawings). If the specific posture changes, the directional indication will change accordingly. 
     In the present application, unless otherwise clearly specified and limited, the terms “connected”, “fixed”, etc. should be interpreted broadly. For example, “fixed” can be a fixed connection, a detachable connection, or a whole; can be a mechanical connection or an electrical connection; may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication between two elements or the interaction relationship between two elements, unless specifically defined otherwise. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to specific circumstances. 
     It should be noted that, the descriptions associated with, e.g., “first” and “second” in the present application are merely for descriptive purposes, and cannot be understood as indicating or suggesting relative importance or impliedly indicating the number of the indicated technical feature. Therefore, the feature associated with “first” or “second” can expressly or impliedly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist, nor is it within the scope of the present application. 
     The present application proposes an optical splicing structure applied to a splicing display device, the splicing display device includes at least two display panels, the optical splicing structure are provided at a splice position of two display panels to achieve seamless connection. 
     Referring to  FIGS.  1  to  4   , in some embodiments under the general technical concept of the present application, the optical splicing structure  10  includes a plastic sealing body  11  and an optical fiber bundle  13 , the plastic sealing body  11  includes an incident end  113  and a light emitting end  111  opposite to the incident end  113 . The optical fiber bundle  13  includes a plurality of optical fiber lines  131  distributed inside the plastic sealing body  11 . The plurality of the optical fiber lines  131  extend in an extension direction from the incident end  113  to the light emitting end  111  and are arranged in a direction perpendicular to the extension direction from the incident end  113  to the light emitting end  111 . 
     In the embodiment, the optical splicing structure  10  is used for the splicing of two display panels  30  and is capable of achieving certain optical transmission effects, the display panel  30  can be a display panel  30  of a rigid liquid crystal display device (LCD), or a flexible organic light-emitting diode (OLED) display panel  30 . 
     In some embodiment, the optical splicing structure  10  includes a plastic sealing body  11  and an optical fiber bundle  13  disposed within the plastic sealing body  11 , which is understood to be a base that fixes the optical fiber bundle  13 . The plastic sealing body  11  needs to fill the gap between two display panels  30 . The plastic sealing body  11  is thus roughly strip shape and extends in the extension direction of a docking side of the two display panels  30  and extends laterally in a width of the gap between the two display panels  30 . The plastic sealing body  11  has a certain thickness in the thickness direction of the display panel  30  to facilitate the fixation, and the thickness direction of the plastic sealing body  11  is also the extension direction of the incident end  113  to the light emitting end  111 . The optical fiber bundle  13  contains a plurality of optical fiber lines  131 , and the plurality of optical fiber lines  131  can be distributed side by side or spaced apart on the lateral surface where the plastic sealing body  11  is located, without limitation herein. Each optical fiber line  131  extends in the direction from the incident end  113  to the emitting end  111 , to realize the light transmission. The light emitting end  111  is also the same as the emitting side of the display panel  30 , which is used to face the user to display the screen. 
     The optical splicing structure  10  of the technical solution of the present application includes a plastic sealing body  11  and an optical fiber bundle  13  with a plurality of optical fiber lines  131  distributed in the plastic sealing body  11 , which provides a fixed base to enable the optical fiber lines  131  to have a specific extension direction, i.e., a specific optical route. The plurality of optical fiber lines  131  extend in the extension direction from the incident end  113  to the light emitting end  111 , and can receive the light from the incident end  113  and transmit the light to the light emitting end  111 , and are distributed in a direction perpendicular to the direction from the incident end  113  to the light emitting end  111 , i.e. in the direction of the lateral connection of the two display panels  30 , so that the light emitting end  111  also forms a certain display screen. The light emitting  111  can cover the black edge  33  or the concave at the splice position of the two display panels  30 , to achieve a seamless splicing effect. The optical fiber line  131  has low loss in optical transmission and can effectively ensure the display screen of the light outlet  111  to improve the effect of seamless splicing. 
     In order to better achieve the function of the optical fiber line  131 , in the some embodiments, the plastic sealing body  11  includes a main body and opaque particles filled within the main body. 
     In the embodiment, the main body is generally made of plastic for the plastic sealing, i.e., it is in liquid form before the plastic sealing, and when loaded into the mold  200  for curing under special conditions, it can fix the fiber bundle  13  and ensure the fixed optical path of the optical fiber line  131 . Here, the material of the main body can be at least one of acrylonitrile-butadiene-styrene plastic (ABS), ultraviolet curing ink (UV ink), polymethyl methacrylate (PMMA) and polycarbonate (PC), all of the above materials are light sparse media relative to the optical fiber line  131 , which can effectively reduce the refraction of light in this material, to reduce the emitting of the light shot along other angles and ensure transmission stability of the light along the optical fiber line  131 , and the stable performance of the material of the main body can protect the fiber line  131  better. The main body is doped with opaque particles, which can be made of carbon black, so that the overall light transmission of the plastic sealing body  11  is lower and light leakage is further reduced. In other embodiments, the material of the opaque particles can also be ferrous metal particles, etc. 
     In order to ensure the optical transmission performance of the optical fiber line  131 , in some embodiments, the material of the optical fiber line  131  is glass fiber or organic fiber, the glass fiber has good high temperature resistance, and good tensile strength and corrosion resistance, to effectively improve the structural stability and service life of the optical fiber line  131 , and the glass fiber has a good light transmission effect. And the organic fiber has better flexibility, which can improve the performance of the optical fiber line  131 . To further improve the structural performance of optical fiber line  131 , please refer to  FIG.  5   , the optical fiber line  131  includes a fiber core  1311 , a cladding layer  1313  and a coating layer  1315  provided sequentially from inside to outside, and the coating layer  1315  is a light sparse material. Here, the fiber core  1311  is a high refractive index glass fiber, which plays the main role of light transmission, and the material of the cladding layer  1313  is a low refractive index silica glass, which plays a certain role of protection and fixed molding for the glass fiber. The coating layer  1315  is a light sparse material, i.e., various plastics or resins mentioned above, with high structural strength and good corrosion resistance, which can effectively improve the strength and structural stability of the optical fiber line  131 , and it can also avoid the influence of the plastic sealing body  11  on the fiber core  1311 . 
     Referring further to  FIGS.  2  and  4   , in some embodiments, the optical fiber line  131  is curved in the extension direction, the end of the optical fiber line  131  at the incident end  113  is perpendicular to the outer surface of the incident end  113 , and the end of the optical fiber line  131  at the light emitting end  111  is perpendicular to the surface of the light emitting end  111 . 
     In the embodiment, in order to make the light emitting end  111  better cover the gap between the two display panels  30 , the area of the light emitting end  111  will generally be larger than the gap between the two display panels  30 , and in order to fix the plastic sealing body  11 , its structure passing through the two display panels  30  needs to be adapted to the gap between the two display panels  30 , so that the width of the plastic sealing body  11  varies significantly in the extension direction from the incident end  113  to the light emitting end  111  of the plastic sealing body  11 , and in order to ensure the optical transmission performance of the optical fiber line  131 , one end of the optical fiber line  131  is placed perpendicular to the outer surface of the incident end  113 , to better receive the display light, and to make it easier for the light to enter the optical fiber line  131  for transmission and improve the transmission effect. Similarly, the other end of the optical fiber line  131  is perpendicular to the outer surface of the light emitting end  111 , which then allows light to be emitted smoothly and improves the display effect to ensure a seamless splicing of the screen of the display area  31  of the two display panels  30  and improve the visual effect. In order to ensure that both ends of the optical fiber line  131  are perpendicular to the respective end surfaces where they are located and that the widths of the two opposite end surfaces are not the same, the optical fiber line  131  is curved in the extension direction, for example, an arc or a parabola, etc., to ensure the efficiency of the incident and emitting of the light at the end, and to improve the transmission efficiency with a smooth extension direction to ensure the display effect. 
     Referring to  FIGS.  2  and  4   , in some embodiments, the incident end  113  includes an incident portion  1131  and a fixing portion  1133 . Two incident portions  1131  are provided on both sides of the fixing portion  1133 , each incident portion  1131  is a concave arc; or, the fixing portion  1133  and the incident portion  1131  are arranged in the direction from the light emitting end  111  to the light emitting end  113 , the fixing portion  1133  is provided with two fixing slots  1133   a  away from each other, a line for connecting the two the fixing slots  1133   a  is perpendicular to the direction from the light emitting end  111  to the incident end  113 , a surface of the incident portion  1131  away from the fixing portion  1133  is flat. 
     It should be understood that the light emitting end  111  is used for emitting light to realize the screen display. In the embodiment, the structure of the incident end  113  is different for the splicing of different display panels  30 . 
     In  FIG.  2   , for example, when splicing the flexible OLED, the edges of the two flexible display panels  30  can be bent to form a curved structure, to hide part of the black edge  33  at splice position of the two. In this way, there will be part of the display area  31  between the two flexible display panels  30 , and the light from the display area  31  here is directly used as the incident light of the incident portion  1131  of the optical splicing structure  10 , which can effectively compact the structure and reduce the spacing therebetween. Therefore, there are two incident portions  1131 , and the fixing portion  1133  is located in the middle, and the two incident portions  1131  are located on both sides of the fixing portion  1133 , and fit with the display area  31  of the two display panels  30 , because the display area  31  of the display panel  30  is a convex curved surface, correspondingly, the incident portion  1131  is a concave curved surface, to achieve a seamless splicing effect. In other embodiments, the surface of the incident portion  1131  can be other shapes, matching the surface of the display panel  30 . Here, the fixing portion  1133  corresponds to the position of the two black edges  33  and can be fixed directly to the black edge  33 . Of course, to further improve the stability and reduce the impact on the black edge  33 , the two black edges  33  are spaced out with a gap, and the fixing portion  1133  is extended a distance toward the direction away from the light emitting end  111 , i.e., toward the back of the display panel  30 , to be connected correspondingly with the component fixing the display panel  30  to ensure a stable mounting structure. The connection method here can be bonding, snap connection, etc., and will not be limited here. 
     In  FIG.  4   , for the splicing of the rigid LCD, because the two adjacent rigid display panels  30  can only be spliced as a flat structure, the black edges  33  of both face each other, so when the optical splicing structure  10  is set between the two rigid display panels  30 , there is no incident light at the splice position to enable the incident end  113  to receive, and because the LCD also needs to have its own backlight structure, so the back of the splice position of the two display panels  30  is set up with a corresponding strip of sub-screen  90  as the light source of the optical splicing structure  10 . In this way, the incident end  113  of the optical splicing structure  10  includes a planar incident portion  1131 , which reaches into the back of the two display panels  30  to fit with the sub-screen  90 , to ensure a better light reception effect. In order to connect with the fixing component of the display panel  30 , the fixing portion  1133  is located between the incident portion  1131  and the light emitting end  111 , and a fixing slot  1133   a  is opened, and the openings of the two fixing slots  1133   a  are away from each other, and the opening of each fixing slot  1133   a  faces the side edge of one display panel  30 , and is bonded or snap connected to the side edges of display panel  30 , etc., without limitation here. The opening of the fixing slot  1133   a  is rectangular, matching the side edges of the display panel  30 , to make the structure more compact and reduce the width at the splice position. 
     Referring again to  FIGS.  1  and  2   , in some embodiments, the plurality of the optical fiber lines  131  are symmetrical about a midline in a direction of their arrangement. 
     In the embodiment, in order to ensure the uniformity of the screen display, the plurality of optical fiber lines  131  are symmetrical about an axis, which is the midline of their arrangement, i.e., the midline in the direction for connecting the two display panels  30  is taken as the axis, so that the light emitting end  111  is displayed more uniformly at the splice position of the two display panels  30 , to ensure the transition of the splicing of the two display areas  31  and further improve the seamless splicing effect, which will further improve the seamless splicing effect. 
     Please refer to  FIGS.  6  to  9   , the present application also proposes a method for manufacturing an optical splicing structure, the optical splicing structure  10  is an optical splicing structure  10  as described in any of the above, the method includes: 
     Step S 1 : suspending a plurality of optical fiber lines  131  above the mold  200  and laying the optical fiber lines  131  along an inner wall surface of the mold  200 ; 
     Step S 2 : filling the mold  200  with a plastic sealing liquid and curing into a plastic sealing body  11 ; 
     Step S 3 : cutting into an optical splicing structure  10 . 
     Referring to  FIG.  7   , in the embodiment, step S 1  is called draping, when hanging multiple optical fiber lines  131  above the mold  200 , the optical fiber lines  131  will fall vertically into the mold  200  under the gravity, to make the optical fiber lines  131  have a specific optical path. The inner wall surface of the mold  200  can be designed, for example, when the optical fiber lines  131  are curved and extended, the inner wall surface of the mold  200  is curved, so that the lower end of the optical fiber line  131  is bent to fit the inner wall surface to complete the initial shape. For example, when the plurality of optical fiber lines  131  are provided symmetrically in the direction of their arrangement, the mold  200  has two symmetrically curved surfaces to achieve a better display effect. Specifically, the mold  200  is rectangular, and its opposite sides are provided with semi-circular arcs of concave grooves, and when the plurality of optical fiber lines  131  are hanging down, a half of the optical fiber lines  131  are bent in one direction along the groove wall of one concave groove, and the other half of the optical fiber lines  131  are bent in a backward direction along the groove wall of the other concave groove, to form a symmetrical structure of the initially shaped optical fiber bundle  13 . 
     Referring to  FIG.  8   , step S 2  is called filling, where the plastic sealing liquid is filled into the mold  200 , to surround the optical fiber lines  131 , and under the filling effect of the liquid, the plurality of optical fiber lines  131  will be fully stretched out and can have a certain space, to allow the plurality of optical fiber lines  131  to be set at intervals in the row direction, to reduce the material used for the optical fiber lines  131  and facilitate cost control. The material of the plastic sealing liquid herein is substantially the material of the plastic sealing body  11  as in the above embodiment, i.e., the main body doped with opaque particles, and the material of the main body can be at least one of acrylonitrile-butadiene-styrene plastic (ABS), ultraviolet curable ink (UV ink), polymethyl methacrylate (PMMA), and polycarbonate (PC). The plastic sealing liquid is then cured into a solid plastic sealing body  11 , which holds the optical fiber line  131  stably in place and forms a stable arc extension structure to ensure better transmission. For example, when the plastic sealing liquid is UV ink, curing can be achieved by UV light irradiation. 
     Referring to  FIG.  9   , when it is necessary to cooperate with the OLED display device, the middle portion of the fiber bundle  13 , which is symmetrically set, extends out of the fixing portion  1133 , so a second filling is also required in step S 2 , i.e., after removing the original mold  200 , the middle position where the mold  200  is located is also filled with the plastic sealing liquid, to form the solid plastic sealing body  11 . 
     Referring to  FIG.  2   , finally, the cured plastic sealing body  11  is then cut to the desired shape and matching size through the cutting in step S 3 . For example, the opposite sides are cut into concave curved surfaces to form the incidence portion  1131  to match the curved edges of the display panel  30  of the OLED. The fixing portion  1133  of the middle portion can be cut directly according to the size needed, or it can then be secondary molded with other materials, to lengthen the length of the fixing portion  1133  for easy fixing. Finally, the cut structure forms the optical splicing structure  10 , which can be mainly used at the splice position of flexible display devices such as OLEDs to display the screen, to solve the problems such as notches or black edges at the splice position and realize seamless splicing. 
     Referring to  FIGS.  10  to  13   , the present application also proposes a splicing display device  100 , the splicing display device  100  includes at least two display panels  30 , and an optical splicing structure  10  as described above, the optical splicing structure  10  is located at the splice position of two adjacent display panels  30 , the light emitting end  111  covers at least the non-display area  31  of two display panels  31 . The structure of the optical splicing structure  10  in the splicing display device  100  of the present application is the structure of the optical splicing structure  10  as in any of the above embodiments, and therefore has the beneficial effects brought about by any of the above embodiments, which will not be repeated herein. 
     In  FIG.  11   , in the embodiment, when the splicing display device  100  is an OLED splicing display device  100 , the optical splicing structure  10  can be installed between the two display panels  30  because the device does not require a backlight and the edges of the two display panels  30  are curved. At this time, the light emitting end  111  of the optical splicing structure  10  covers the edges of the two display panels  30 , covers at least the non-display area  31  of the display panel  30 , i.e., the black edge  33 , and the incident portion  113  of the incident end  113  attached to the curved display area  31 , so that the light from the display area  31  is transmitted to the corresponding light emitting end  111  of the non-display area  31 . In order to improve the splicing effect, the edge of the light emitting end  111  is extended to the display area  31 , and the size beyond the black edge  33  is less than or equal to 8 mm, for example, 7 mm, 6 mm, etc., to effectively ensure the display screen of the light emitting end  111 , to improve the smoothness of the articulation and ensure the seamless splicing effect. 
     When the width of the light end  111  is certain, in order to improve the display effect, the thickness of the optical splicing structure  10  can also be thickened, that is, the height of the light end  111  is flush with the light surface of the display panel  30 , or higher than the light emitting surface of the display panel  30 , here, it should not be high too much above the light emitting surface of the display panel  30 , can choose a size range of less than or equal to 5 mm, so as to ensure the light emitting effect not consume too much material and reduce cost. The optical splicing structure  10  in the splicing display device  100  is not too abrupt, to improve the overall aesthetics. 
     In  FIG.  13   , when the splicing display device  100  is LCD display device, the splicing display device  100  also includes a sub-screen  90  for the optical splicing structure  10  to provide a light source for display. The light emitting end  111  of the optical splicing structure  10  is set above the black edge  33  of the two display panels  30 , the fixing slot  1133   a  formed by the fixing portion  1133  is stuck on the side edge of each display panel  30 , the sub-screen  90  is set on the side edge of the display panel  30  away from the light emitting surface, and the incident portion  1131  is attached to the surface of the sub-screen  90  to receive the emitted light and transmit it to the light emitting end  111 . Here, the sub-screen  90  includes a sub-backlight module  93  and a sub-display panel  91 . Of course, the back of the two spliced display panels  30  is also provided with a backlight module  70  to provide the light source for the desired display screen. The sub-display panel  91  and the spliced display screen of the two display panels  30  need to be integrated control to ensure the smooth splice of the screen, does not affect the screen display. The backlight module  70  includes a backlight source and a number of stacked optical control members, optical control members can be light guide, light gain or diffusion sheet, etc., so as to provide a more uniform and stable light source for the display panel  30 . Here, the backlight source can be set on the side edge of the optical control member, i.e., the backlight module  70  is a side-entry backlight module; the backlight source can be set below the optical control member, i.e., the backlight module  70  is a straight-down backlight module. 
     Referring again to  FIG.  11   , based on the above embodiments, the splicing display device  100  further includes a support assembly  50 , the support assembly  50  is provided on the surface of the display panel  30  away from the light emitting end  111 , the incident end  113  passes through the two display panels  30  to fixedly connect to the support assembly  50 . 
     It can be understood that in order to protect the display panel  30  and fix the display panel  30 , the splicing display device  100  also includes a support assembly  50 , which is provided on the surface of the display panel  30  away from the light emitting end  111 , so as not to affect the display of the screen. When the splicing display device  100  is OLED, the incident end  113  passes through the splice position of the two display panels  30  and is directly connected to the support assembly  50 . Here, the support assembly  50  may include two support members  51 , each of which is connected to a display panel  30 , and the fixing portion  1133  is connected to each of the two support members  51 . The connection between the support member  51  and the display panel  30  can be bonded, as no light is required to pass through, the bonding member can be a transparent material or shading material, transparent material, for example, liquid glue such as resin glue or methanol glue, etc., or solid glue, which is convenient to connect and can reduce costs. The shading material for example, black and black double-sided adhesive, black and white double-sided adhesive or PET black double-sided adhesive, etc. And the fixing portion  1133  and the support member  51  can also be bonding, or plug, clamping connection, etc., which will not be limited herein. Of course, the plurality of support members  51  can also be an integrated structure, to facilitate processing, the hole is opened corresponding to the fixing portion  1133  for fixation. 
     Please refer to  FIG.  13   , on the basis of the above embodiment, when the splicing display device  100  is LCD, the support assembly  50  needs to fix the backlight module  70  in addition to the display panel  30 , i.e., the backlight module  70  is installed on the support assembly  50 , and the display panel  30  is located on the light emitting side of the backlight module  70  and fixed to the support assembly  50 . Of course, the sub-screen  90  that provides light source to the optical splicing structure  10  also needs to be provided with a support assembly  50 , which is connected to the back of the support assembly  50  of the display panel  30  for splicing, and is mounted with a sub-backlight module  93  and a sub-display panel  91 , so as to provide light source for the incident end  113  that passes through the gap between the two spliced display panels  30  and the two support assemblies  50 , and the specific structure can be set as needed. 
     The splicing display device  100  in the technical solution of the present application, due to the inclusion of the optical splicing structure  10 , can effectively cover the black edges and concave at the splice position when targeting the splicing of the flexible display panel  30 , and direct the light from the display area  31  of the display panel  30  to the light emitting end  111  to realize the display of the screen, to realize the effect of seamless splicing. Of course, when applied to a rigid LCD display device, it is sufficient to match the corresponding strip-shaped sub-screen  90 . 
     The above mentioned is only a preferred embodiment of the present application, not to limit the scope of the present application. Any equivalent structural transformation made under the inventive concept of the present application using the specification of the present application and the contents of the attached drawings, or direct/indirect application in other related technical fields are included in the scope of the present application.