splicing screens and display devices
By using flexible OLED display panels in splicing screens and setting transparent gaps between adjacent panels, light can pass through the gaps to display, solving the problem of poor display in splicing screens and improving display effect and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BOE TECHNOLOGY GROUP CO LTD
- Filing Date
- 2022-06-23
- Publication Date
- 2026-07-03
AI Technical Summary
In existing splicing screens, LED display panels are made of rigid materials, resulting in obvious seams during splicing, which affects the display effect. Although OLED display panels are flexible, they still have some impact.
A flexible OLED display panel is used, and a transparent gap is set between adjacent display panels. The display area of the second display panel overlaps with the gap in the thickness direction of the splicing screen. The light from the second display panel passes through the gap to display, thus compensating for the display defects caused by the gap.
It improves the display effect of the splicing screen, avoids display defects caused by splicing seams, and enhances the continuity and stability of the display device.
Smart Images
Figure CN117769731B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of display technology, specifically to a video wall and a display device. Background Technology
[0002] With the rapid development of display technology, multi-screen splicing image display has been increasingly widely used in large venues such as shopping malls, cinemas, and stadiums. It not only solves the technical problems of high cost and difficult maintenance of a single large screen, but also has extremely high scalability and can be used to display images of various sizes. Summary of the Invention
[0003] This disclosure provides a video wall and a display device.
[0004] In a first aspect, embodiments of this disclosure provide a video wall, comprising:
[0005] Multiple first display panels are spliced together, each first display panel including a first display area and a first non-display area surrounding the first display area; the first non-display area is a light-transmitting area.
[0006] Multiple second display panels are located on the non-display side of the first display panel. Each second display panel includes a second display area and a second non-display area surrounding the second display area. The light emission direction of the second display panel is the same as that of the first display panel.
[0007] There is a gap between the first display areas of two adjacent first display panels, and the gap includes at least a portion of the first non-display areas of the two adjacent first display panels; the second display area overlaps with the gap in the thickness direction of the splicing screen.
[0008] In some embodiments, the orthographic projection of the interval area onto the second display panel is located within the second display area.
[0009] In some embodiments, the first display panel is a flexible display panel, and the splicing screen further includes: a plurality of first support layers, wherein each first display panel is correspondingly disposed on a first support layer;
[0010] The second display panel is located between the two first support layers corresponding to the two adjacent first display panels.
[0011] In some embodiments, a first back film, a first optical adhesive layer and a first buffer layer are further disposed between the first display panel and the first support layer;
[0012] The first optical adhesive layer is located on the side of the first back film away from the first display panel;
[0013] The first buffer layer is located on the side of the first optical adhesive layer away from the first back film.
[0014] In some embodiments, the first buffer layer includes a first buffer pad and a second buffer pad surrounding the first buffer pad;
[0015] The orthographic projection of the first buffer pad onto the first back film is located within the orthographic projection range of the first support layer onto the first back film;
[0016] The area of the first buffer layer is not less than the area of the first display panel, and the difference between the area of the first buffer layer and the area of the first display panel is less than 1 / 10 of the area of the first non-display area.
[0017] The elastic modulus of the second buffer pad is less than that of the first buffer pad.
[0018] In some embodiments, the area of the first buffer layer is equal to the area of the first display panel.
[0019] In some embodiments, for the second display panel and an adjacent first display panel:
[0020] There is a first gap between the boundary of the first display area and the boundary of the first support layer, and there is a second gap between the boundary of the second display area and the boundary of the first support layer, wherein the first gap is greater than or equal to the second gap.
[0021] In some embodiments, the second display panel is a flexible display panel, and the splicing screen further includes:
[0022] Multiple second support layers, with each second display panel correspondingly disposed on one of the second support layers.
[0023] In some embodiments, the thickness of both the second display panel and the second support layer is less than the thickness of the first support layer.
[0024] In some embodiments, both the second display panel and the second support layer are bonded to the first support layer via an adhesive layer.
[0025] In some embodiments, the material of the adhesive layer includes at least fluorinated rubber.
[0026] In some embodiments, a second back film, a second optical adhesive layer and a second buffer layer are further included between the second display panel and the second support layer;
[0027] The second back film, the second optical adhesive layer, and the second buffer layer are sequentially arranged in a direction away from the second display panel.
[0028] The first display panel includes a first display substrate, a first polarizer, and a first cover plate.
[0029] The first polarizer is located on the display side of the first display substrate; the first cover plate is located on the side of the first polarizer away from the first substrate. In a second aspect, embodiments of this disclosure provide a display device including the splicing screen described in the first aspect. Attached Figure Description
[0030] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0031] Figure 1 This is a schematic diagram of the structure of a video wall provided in an embodiment of this disclosure.
[0032] Figure 2 This is a schematic diagram of the structure of a first display module provided in an embodiment of the present disclosure.
[0033] Figure 3 This is a schematic diagram of the structure of a first display substrate provided in an embodiment of the present disclosure.
[0034] Figure 4 This is a partial structural schematic diagram of a first display module provided in an embodiment of the present disclosure.
[0035] Figure 5 This is a schematic diagram of the structure of a second display module provided in an embodiment of the present disclosure.
[0036] Figure 6 This is a schematic diagram of a video wall display provided in an embodiment of the present disclosure. Detailed Implementation
[0037] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0038] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.
[0039] Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0040] With the rapid development of display technology, large-scale display devices composed of multiple display panels are increasingly being used. This solves the technical problems of high cost and difficult maintenance of single large screens, and also offers high scalability, making it suitable for displaying images of various sizes. In related technologies, splicing screens are mostly formed by splicing multiple light-emitting diode (LED) devices. However, since LED display panels are rigid materials, they inevitably have bezels, resulting in noticeable seams when two LED display panels are spliced together.
[0041] Organic light-emitting diode (OLED) devices are electroluminescent devices based on organic semiconductor materials. They possess high light conversion efficiency and low power consumption. Furthermore, OLED display panels are flexible, allowing them to be manufactured in various shapes and sizes, including curved, folded, irregularly shaped, and rollable forms. Due to their flexibility, OLED display panels are more suitable for use in ultra-large-scale video walls compared to LED display panels.
[0042] While splicing screens composed of multiple OLED display panels show a significant improvement in seam width compared to splicing screens composed of multiple LED display panels, they still have some impact on the display effect.
[0043] To address at least one of the aforementioned technical problems, this disclosure provides a video wall.
[0044] Figure 1 This is a schematic diagram of the structure of a video wall provided in an embodiment of this disclosure, as shown below. Figure 1As shown, the splicing screen includes multiple first display modules 1 and multiple second display modules 2, wherein each first display module 1 includes a first display panel 1a and each second display module 2 includes a second display panel 2a.
[0045] Multiple first display panels 1a are spliced together. Each first display panel 1a includes a first display area AA1 and a first non-display area NA1 surrounding the first display area AA1, and the first non-display area NA1 is a light-transmitting area. A second display panel 2a is located on the non-display side of the first display panel 1a. The second display panel 2a includes a second display area AA2 and a second non-display area NA2 surrounding the second display area AA2. The light emission direction of the second display panel 2a is the same as that of the first display panel 1a.
[0046] There is a gap between the first display areas AA1 of two adjacent first display panels 1a, and the gap includes at least a portion of the first non-display areas NA1 of the two adjacent first display panels 1a; the second display area AA2 overlaps with the gap in the thickness direction of the splicing screen. The overlap between the second display area AA2 and the gap in the thickness direction of the splicing screen means that, with the plane where the splicing screen is located as the reference plane, the orthographic projection of the second display area AA2 on the reference plane overlaps with the orthographic projection of the gap on the reference plane.
[0047] It should be noted that the aforementioned non-display side refers to the side opposite to the light emission direction of the display panel, that is, the side of the display panel away from the light emission direction.
[0048] In the splicing screen provided in this embodiment, the gap area includes at least a portion of the first non-display area NA1 of two adjacent first display panels 1a. The gap area is equivalent to the splicing seam between the two first display areas. Since the first non-display area NA1 is a transparent area, the gap area is also a transparent area. The second display panel 2a is located on the non-display side of the first display panel 1a, and its light emission direction is the same as that of the first display panel 1a. In addition, the second display area AA2 of the second display panel 2a overlaps with the gap area in the thickness direction of the splicing screen. That is to say, at least a portion of the light emitted by the second display panel 2a can pass through the transparent gap area, thereby enabling the splicing seam between the two first display areas to also be displayed. This can compensate for the display defects caused by the gap area and improve the display effect of the splicing screen.
[0049] In some embodiments, such as Figure 1 As shown, the orthographic projection of the interval area on the second display panel 2a is located within the second display area AA2, so that the entire interval area can display the screen content of the second display area AA2, avoiding poor display caused by missing images in the interval area and improving the display effect of the splicing screen.
[0050] Figure 2This is a schematic diagram of the structure of a first display module provided in an embodiment of the present disclosure. In some embodiments, such as... Figure 1 , 2 As shown, the first display panel 1a is a flexible display panel. The first display module 1 further includes a first support layer 11. The first display panel 1a is disposed on the first support layer 11, so that the flexible first display panel 1a has a support structure with high rigidity, which facilitates the arrangement and installation of the first display panel 1a and improves the structural stability of the first display panel 1a. The second display panel 2a is located between the two first support layers 11 corresponding to the two adjacent first display panels 1a.
[0051] It should be noted that the dimension of the first support layer 11 in the horizontal direction of the first display panel 1a is smaller than that of other film layer structures in the first display module 1 in the horizontal direction of the first display panel 1a, so that sufficient space can be reserved between the first support layers 11 of two adjacent first display modules 1 to set the second display module 2.
[0052] In some embodiments, such as Figure 1 , Figure 2 As shown, the first display panel 1a includes a first display substrate 15, a first polarizer 16 and a first cover plate 17. The first polarizer 16 is located on the display side of the first display substrate 15; the first cover plate 17 is located on the side of the first polarizer 16 away from the first display substrate 15.
[0053] It should be noted that since the first display panel 1a is a flexible display panel, the substrate of the first display substrate 15 can be a flexible substrate. For example, the substrate material can be a polyimide film.
[0054] The aforementioned first polarizer 16 can be a circular polarizer, specifically comprising a linear polarizing film and a quarter-wave plate. The linear polarizing film is located between the quarter-wave plate and the first cover plate 17, and the optical axis of the quarter-wave plate forms a 45-degree angle with the polarization direction of the linear polarizing film. When the display panel receives external light, the external light becomes linearly polarized after passing through the linear polarizing film. The incident linearly polarized light then becomes circularly polarized after passing through the quarter-wave plate. This circularly polarized light is reflected at the surface of the display panel, and the reflected circularly polarized light rotates in the opposite direction. After passing through the wave plate, it becomes linearly polarized light with a polarization direction perpendicular to the light transmission direction of the linear polarizing film, and is thus absorbed by the linear polarizing film. By utilizing the anti-reflection characteristics of the circular polarizer, the surface reflection of external light is significantly reduced, effectively improving the display effect of the display panel in strong outdoor light environments, thereby greatly enhancing the user experience.
[0055] The aforementioned first cover plate 17 has functions such as enhancing light transmittance, and can also improve the encapsulation performance of the first display panel 1a, effectively preventing oxygen, water vapor, etc. from entering the interior of the first display panel 1a.
[0056] Figure 3 This is a schematic diagram of the structure of a first display substrate provided in an embodiment of the present disclosure. In one example, such as... Figure 3 As shown, the first display substrate 15 may include a substrate and a thin-film transistor 40, a planarization layer PLN, and a light-emitting device 30 disposed on the substrate 10. The substrate also has multiple gate lines and multiple data lines, which intersect to define multiple pixels. Each pixel contains a thin-film transistor 40 and a light-emitting device 30. The planarization layer PLN is located on the side of the thin-film transistor 40 away from the substrate 10. The light-emitting device 30 includes a first electrode 31, a second electrode 33 disposed opposite to each other, and a light-emitting functional layer 32 located between them. The first electrode 31 is connected to the drain 41 of the thin-film transistor 40 through a via on the planarization layer PLN.
[0057] like Figure 3 As shown, the display substrate also includes a pixel defining layer (PDL). The PDL is located on the side of the first electrode 31 away from the substrate 10 and has multiple openings, in which light-emitting devices 30 are correspondingly disposed. Specifically, the light-emitting devices 30 are disposed in the openings such that a portion of the first electrode 31 is exposed, the light-emitting functional layer 32 is disposed within the openings, and the second electrodes 33 of the multiple light-emitting devices 30 can be formed into a single structure.
[0058] In addition, in this embodiment, the light-emitting device 30 is a top-emitting device. Optionally, the first electrode 31 is a reflective electrode made of a metallic material, and the second electrode 33 is a transparent electrode made of a transparent conductive material (e.g., indium tin oxide). In one example, the first electrode 31 can be an anode, and the second electrode 33 can be a cathode. Furthermore, the aforementioned light-emitting functional layer 32 may include, in sequence, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer.
[0059] The thin-film transistor 40 includes a gate 44, an active layer 43, a source 42, and a drain 41. Taking a top-gate thin-film transistor 40 as an example, the gate 44 is located on the side of the active layer 43 away from the substrate 10, and the source 42 and drain 41 are located on the side of the gate 44 away from the substrate 10. The material of the active layer 43 may include, for example, inorganic semiconductor materials (e.g., polycrystalline silicon, amorphous silicon, etc.), organic semiconductor materials, and oxide semiconductor materials. The active layer 43 includes a channel portion and a source connection portion and a drain connection portion located on both sides of the channel portion. The source connection portion is connected to the source 42 of the thin-film transistor, and the drain connection portion is connected to the drain 41 of the thin-film transistor. Both the source connection portion and the drain connection portion may be doped with impurities (e.g., N-type impurities or P-type impurities) with a higher impurity concentration than the channel portion. The channel is directly opposite the gate 44 of the thin-film transistor. When the voltage signal applied to the gate 44 reaches a certain value, a carrier path is formed in the channel, which turns on the source 42 and drain 41 of the thin-film transistor.
[0060] like Figure 3 As shown, the first display substrate 15 further includes: a buffer layer BUF, a first gate insulating layer GI1, a second gate insulating layer GI2, and an interlayer insulating layer ILD. The buffer layer BUF is located between the substrate 10 and the thin-film transistor 40, and is used to prevent or reduce the diffusion of metal atoms and / or impurities from the substrate 10 into the active layer 43 of the thin-film transistor. The buffer layer BUF may comprise inorganic materials such as silicon oxide, silicon nitride, and / or silicon oxynitride, and may be formed as a multilayer or a single layer.
[0061] The first gate insulating layer GI1 is located between the active layer 43 and the gate 44 of the thin-film transistor; the second gate insulating layer GI2 and the interlayer insulating layer ILD are located between the gate 44 and the source 42 of the thin-film transistor, with the interlayer insulating layer ILD located on the side of the second gate insulating layer GI2 away from the substrate 10. The materials of the first gate insulating layer GI1, the second gate insulating layer GI2, and the interlayer insulating layer ILD can all include silicon compounds or metal oxides, and can all be formed as a single layer or multiple layers, which is not limited in this embodiment.
[0062] A gate electrode layer is disposed on the side of the first gate insulating layer GI1 away from the substrate 10. The gate electrode layer includes the gate 44 of each thin-film transistor, a first electrode plate of the capacitor, and a second electrode plate of the capacitor. The second electrode plate of the capacitor (not shown in the figure) is disposed on the side of the second gate insulating layer GI2 away from the substrate 10 and is connected to the source 42 of the thin-film transistor; its material can be the same as the material of the first electrode plate. The material of the gate electrode layer can include, for example, metals, metal alloys, metal nitrides, conductive metal oxides, transparent conductive materials, etc. For example, the gate electrode layer can include gold, gold alloys, silver, silver alloys, aluminum, aluminum alloys, aluminum nitride, tungsten, tungsten nitride, copper, copper alloys, nickel, chromium, chromium nitride, molybdenum, molybdenum alloys, titanium, titanium nitride, platinum, tantalum, tantalum nitride, neodymium, scandium, strontium ruthenium oxide, zinc oxide, tin oxide, indium oxide, gallium oxide, indium tin oxide, indium zinc oxide, etc. The gate electrode layer can be single-layered or multi-layered.
[0063] In addition, such as Figure 3 As shown, the first display substrate 15 may further include an encapsulation layer 6 located on the side of the second electrode 33 away from the substrate 10, for isolating moisture, protecting the various film layers within the first display substrate from corrosion, and improving the protective effect on the various film layers. The encapsulation layer 6 may include an inorganic encapsulation layer and an organic encapsulation layer. For example, the encapsulation layer 6 includes a first inorganic encapsulation layer, a second inorganic encapsulation layer, and an organic encapsulation layer located between the two.
[0064] The first display substrate 15 may also have a passivation layer (not shown) between the drain 41 of the thin-film transistor 40 and the planarization layer PLN. In this case, the first electrode 31 will be connected to the drain 41 through a via penetrating the passivation layer and the planarization layer PLN. The material of the passivation layer may include, for example, silicon oxynitride, silicon oxide, silicon nitride, etc.
[0065] In some embodiments, such as Figure 1 , Figure 2 As shown, a first back film 14, a first optical adhesive layer 13 and a first buffer layer 12 are further disposed between the first display panel 1a and the first support layer 11; wherein, the first optical adhesive layer 13 is located on the side of the first back film 14 away from the first display panel 1a; and the first buffer layer 12 is located on the side of the first optical adhesive layer 13 away from the first back film 14.
[0066] The aforementioned first optical adhesive layer 13 may include OCA optical adhesive, which has strong adhesion and can achieve bonding and connection of different film layers on the display panel; it can also absorb ultraviolet rays to avoid ultraviolet aging and also avoid loss of its mechanical and optical properties; OCA optical adhesive also has good optical properties to avoid affecting the display effect of the display panel.
[0067] Figure 4This is a partial structural diagram of a first display module provided in an embodiment of the present disclosure. In some embodiments, such as... Figure 4 As shown, the first buffer layer 12 includes a first buffer pad 121 and a second buffer pad 122 surrounding the first buffer pad 121; the orthographic projection of the first buffer pad 121 on the first back film 14 is located within the orthographic projection range of the first support layer 11 on the first back film 14; the area of the first buffer layer 12 is not less than the area of the first display panel 1a.
[0068] In one example, the area of the first buffer layer 12 is larger than the area of the first display panel 1a, and the difference between the two is less than 1 / 10 of the area of the first non-display area; in another example, the area of the first buffer layer 12 is equal to the area of the first display panel 1a, that is, the orthographic projection of the first buffer layer 12 on the plane where the first back film 14 is located overlaps with the orthographic projection of the first display panel 1a on the plane where the first back film 14 is located, so that when two first display panels 1a are spliced, the first buffer layer 12 on the two adjacent first display panels 1a, especially the second buffer pad 122 located in the edge area, can buffer the stress experienced by the two first display panels 1a when splicing.
[0069] Meanwhile, the elastic modulus of the second buffer pad 122 is less than that of the first buffer pad 121. In other words, the second buffer pad 122 is more flexible than the first buffer pad 121, which further avoids damage to the first display panel 1a during the splicing process.
[0070] It should be noted that since the interval area of the first display panel 1a is a transparent area, the content of the second display panel 2a can be displayed through the interval area. Therefore, the parts of the first back film 14, the first optical adhesive layer 13 and the first buffer layer 12 that overlap with the interval area in the thickness direction of the splicing screen are all made of transparent materials.
[0071] In some embodiments, such as Figure 1 As shown, the second display module 2 is located between the first support layers 11 of two adjacent first display modules 1. In this case, to ensure the stability among multiple display modules in the splicing screen, the thickness of the second display panel 2a and the second support layer 21 in the second display module 2 is less than the thickness of the first support layer 11 in the first display module 1. Furthermore, the overall thickness of the second display module 2 is less than or equal to the thickness of the first support layer 11, thereby preventing the second display module 2 from protruding from the first display module 1, thus facilitating the installation of the entire splicing screen.
[0072] In some embodiments, both the second display panel 2a and the second support layer 21 are bonded to the first support layer 11 via an adhesive layer 5. The adhesive layer 5 can be made of any one of fluorinated adhesive, tarfenalool, acrylate-based adhesive, or silicone-based adhesive. All of these adhesive layer materials have waterproof properties. The adhesive layer 5, made of these materials, not only securely connects the second display panel 2a and the second support layer 21 but also prevents moisture erosion, thus avoiding adverse effects on the display effect of the splicing screen.
[0073] It should also be noted that the second back film 24, the second optical adhesive layer 23, the second buffer layer 22 and the second support layer 21 in the second display module 2 can all be bonded to the first support layer 11 through the aforementioned adhesive layer 5.
[0074] In one example, the second display module 2 has an adhesive layer 5 between each of the two adjacent first support layers 11, meaning the adhesive layer 5 is located on the side of the second display module 2. In another example, the adhesive layer 5 includes a first adhesive layer located on the side of the second display module 2, and a second adhesive layer located on the side of the second support layer 21 facing away from the second display panel 2a. The second adhesive layer can also be bonded to the surface of the first support layer 21 facing away from the first display panel 1a, and the first and second adhesive layers form an integral structure. That is, the adhesive layer can cover the part of the second display module 2 except for the surface on the side facing the light emission direction, improving the stability of the splicing screen.
[0075] Figure 5 This is a schematic diagram of the structure of a second display module provided in an embodiment of the present disclosure. In some embodiments, such as... Figure 1 , Figure 5 As shown, the second display panel 2a is a flexible display panel, and the second display module 2 further includes a second support layer 21. The second display panel 2a is disposed on the second support layer 21 so that the second display panel 2a with flexible characteristics has a support structure with greater rigidity, which facilitates the arrangement and installation of the second display panel 2a.
[0076] In some embodiments, such as Figure 5 As shown, the second display panel 2a and the second support layer 21 also include a second back film 24, a second optical adhesive layer 23, and a second buffer layer 22; the second back film 24, the second optical adhesive layer 23, and the second buffer layer 22 are arranged sequentially in a direction away from the second display panel 2a. The materials and functions of the second back film 24 and the second optical adhesive layer 23 in the second display module 2 are the same as those of the first back film 14 and the first optical adhesive layer 13 in the first display module 1, and will not be described in detail here.
[0077] It should be noted that the first buffer layer 12 is made of two different materials: the first buffer pad 121 and the second buffer pad 122. This is to buffer the stress experienced when adjacent first display panels 1a are spliced together, thus preventing damage to the first display panels 1a. However, the second display panel 2a is disposed between two adjacent first support layers 11 and is bonded to the two adjacent first support layers 11. Therefore, it does not need to consider the problem of damage caused by collision. Thus, the material of the second buffer layer 22 can be the same as the first buffer pad 121; it can also be the same as the second buffer pad 122; or it can be made of the same material as the first buffer layer 12, that is, the first buffer pad 121 surrounds the second buffer pad 122. In this embodiment, the material of the second buffer layer 22 is not limited.
[0078] like Figure 5 As shown, the second display panel 2a includes a second display substrate 25, a second polarizer 26, and a second cover plate 27. The second polarizer 26 is located on the display side of the second display substrate 25; the second cover plate 27 is located on the side of the second polarizer 26 away from the first substrate. Furthermore, the second display substrate 25, the second polarizer 26, and the second cover plate 27 in the second display panel 2a have the same structure, materials, and functions as the first display substrate 15, the first polarizer 16, and the first cover plate 17 in the first display panel 1a, and will not be described in detail here.
[0079] In some embodiments, such as Figure 1 As shown, for the second display panel 2a and an adjacent first display panel 1a: there is a first gap d1 between the boundary of the first display area AA1 and the boundary of the first support layer 11, and there is a second gap d2 between the boundary of the second display area AA2 and the boundary of the first support layer 11. The first gap d1 is greater than the second gap d2.
[0080] It should be noted that the aforementioned second spacing d2 is the distance between the boundary of the second display area AA2 and the boundary of the first support layer 11. Since the second display panel 2a and the first support layer 11 are connected by an adhesive layer 5, the second spacing d2 includes not only the width of the second non-display area NA2 of the second display panel 2a but also the width of the adhesive layer. Both the width and spacing refer to the dimensions of the second display panel 2a in the direction facing the first support layer 11.
[0081] Figure 6 This is a schematic diagram of a display screen provided in an embodiment of the present disclosure, such as... Figure 6As shown, areas A1 and A2 are the first display areas of two adjacent first display panels 1a, and area B is the area of the second display area of the second display panel 2a that is exposed by the gap. Ideally, when the first gap d1 and the second gap d2 are equal, areas A1, B, and A2 are connected sequentially, and there are no gaps in the displayed image of the splicing screen. However, considering that there are certain assembly tolerances in the splicing process of multiple display modules, the first gap d1 is set to be greater than the second gap d2, so that the orthographic projection of the gap area on the second display panel 2a can be completely covered by the second display area, thereby avoiding gaps in the displayed image caused by assembly tolerances and improving the display effect of the splicing screen.
[0082] In addition, the parts of the second display area that overlap with the first display area in the thickness direction of the splicing screen display the same content to ensure the continuity of the displayed images on the splicing screen.
[0083] This disclosure also provides a display device, including the aforementioned splicing screen and a driving structure for providing driving signals to the splicing screen. The splicing screen includes multiple first display modules and multiple second display modules, wherein each first display module includes a first display panel, and each second display module includes a second display panel. The second display panel is located on the non-display side of the first display panel, and its light emission direction is the same as that of the first display panel. Furthermore, the second display area of the second display panel overlaps with the spacing area in the thickness direction of the splicing screen. This means that at least a portion of the light emitted by the second display panel can pass through the transparent spacing area, thereby enabling display at the seam between the two first display areas. This compensates for display defects caused by the spacing area and improves the display effect of the display device.
[0084] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.
Claims
1. A type of video wall, wherein, include: Multiple first display panels are spliced together, each first display panel including a first display area and a first non-display area surrounding the first display area; The first non-display area is a light-transmitting area; A plurality of second display panels are located on the non-display side of a plurality of first display panels. Each of the plurality of second display panels includes a second display area and a second non-display area surrounding the second display area. The plurality of second display panels have the same light emission direction as the plurality of first display panels. Wherein, there is a gap between the first display areas of any two adjacent first display panels, the gap including at least a portion of the first non-display areas of the two adjacent first display panels; the second display area of the second display panel corresponding to the two adjacent first display panels overlaps with the gap in the thickness direction of the splicing screen; The splicing screen further includes: a plurality of first support layers, each of the first display panels being disposed on a corresponding first support layer; and between each of the plurality of first display panels and the corresponding first support layer, there is also disposed: a first back film, a first optical adhesive layer and a first buffer layer. The first optical adhesive layer is located on the side of the first back film away from the first display panel; The first buffer layer is located on the side of the first optical adhesive layer away from the first back film; The first buffer layer includes a first buffer pad and a second buffer pad surrounding the first buffer pad; The orthographic projection of the first buffer pad onto the first back film is located within the orthographic projection range of the corresponding first support layer onto the first back film; The area of the first buffer layer is not less than the area of the first display panel, and the difference between the area of the first buffer layer and the area of the first display panel is less than 1 / 10 of the area of the first non-display area. The elastic modulus of the second buffer pad is less than that of the first buffer pad.
2. The splicing screen according to claim 1, wherein, The orthographic projection of the interval area onto the corresponding second display panel is located within the second display area.
3. The splicing screen according to claim 1, wherein, Each of the plurality of first display panels is a flexible display panel; The second display panel is located between the two first support layers corresponding to the two adjacent first display panels.
4. The splicing screen according to claim 1, wherein, The area of the first buffer layer is equal to the area of the first display panel.
5. The splicing screen according to claim 3, wherein, For each of the second display panels and a first display panel adjacent to the second display panel: There is a first gap between the boundary of the first display area and the boundary of the corresponding first support layer, and there is a second gap between the boundary of the second display area and the boundary of the corresponding first support layer, wherein the first gap is greater than or equal to the second gap.
6. The splicing screen according to claim 3, wherein, Each of the plurality of second display panels is a flexible display panel, and the splicing screen further includes: Multiple second support layers, with each second display panel correspondingly disposed on one of the second support layers.
7. The splicing screen according to claim 6, wherein, The thickness of each of the plurality of second display panels and the thickness of each of the plurality of second support layers are both less than the thickness of each of the plurality of first support layers.
8. The splicing screen according to claim 6, wherein, Each of the plurality of second display panels and its corresponding second support layer is bonded to the corresponding first support layer by an adhesive layer.
9. The splicing screen according to claim 8, wherein, The adhesive layer is made of at least fluorinated rubber.
10. The splicing screen according to claim 6, wherein, Each of the plurality of second display panels further includes a second back film, a second optical adhesive layer and a second buffer layer between itself and the corresponding second support layer; The second back film, the second optical adhesive layer, and the second buffer layer are sequentially arranged in a direction away from the second display panel.
11. The video wall according to any one of claims 1-10, wherein, Each of the plurality of first display panels includes a first display substrate, a first polarizer, and a first cover plate. The first polarizer is located on the display side of the first display substrate; the first cover plate is located on the side of the first polarizer away from the first display substrate.
12. A display device, wherein, Includes the splicing screen described in any one of claims 1-11.