Tiled screen and display driving method therefor, and display device

Abstract

A tiled screen and a display driving method therefor, and a display device, which relate to the technical field of display. The tiled screen comprises: a cover plate (100); and a plurality of display panels arranged on a side of the cover plate (100), wherein the plurality of display panels comprise a first display panel (210) and a second display panel (220) which are tiled together, the first display panel (210) comprises a first active area (AA1), and a first bezel zone (BZ1) located on the side of the first active area (AA1) close to the second display panel (220); the second display panel (220) comprises a second active area (AA2), and a second bezel zone (BZ2) located on the side of the second active area (AA2) close to the first display panel (210); and in an orthographic projection on the cover plate (100), at least a part of the first bezel zone (BZ1) overlaps with the second active area (AA2), display light of the second active area (AA2) can transmit the first bezel zone (BZ1) overlapping with the second active area (AA2), and the first display panel (210) is located on the side of the second display panel (220) close to the cover plate (100).

Description

Video wall and its display driving method and display device

[0001] Cross-references to related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 202411747646.6, filed on November 29, 2024, entitled "Video Splicing Screen and Display Driving Method Thereof, Display Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of display technology, and in particular to a video wall and its display driving method and display device. Background Technology

[0004] Video wall displays feature large screen size, multi-screen interaction, and flexible expansion, providing users with a more immersive visual experience. A video wall is composed of multiple display panels, each including a display area and a non-display area surrounding it.

[0005] Overview

[0006] According to a first aspect of this disclosure, a video wall is provided, comprising:

[0007] Cover plate; and

[0008] Multiple display panels are disposed on one side of the cover plate. The multiple display panels include a first display panel and a second display panel spliced ​​together. The first display panel includes a first display area and a first border area. The first border area is located on the side of the first display area closer to the second display panel. The second display panel includes a second display area and a second border area. The second border area is located on the side of the second display area closer to the first display panel.

[0009] In the orthographic projection on the cover plate, at least a portion of the first border area overlaps with the second display area, and the first border area overlapping with the second display area is able to transmit the display light of the second display area. The first display panel is located on the side of the second display panel closer to the cover plate.

[0010] In some embodiments, in the orthographic projection on the cover plate, the first display area near the boundary of the first border area is aligned with the second display area near the boundary of the second border area.

[0011] In some embodiments, in the orthographic projection on the cover plate, the transmittance of the first border area overlapping the second display area is greater than or equal to 20%.

[0012] In some embodiments, the first frame area includes a first trace for transmitting power signals. The first trace overlaps with the orthographic projection of the second display area on the cover plate. The main material of the first trace is metal. The first trace has a plurality of mutually spaced openings for transmitting display light from the second display area.

[0013] In some embodiments, the second display area includes a plurality of pixel units arranged along the row and column directions, and the pixel unit includes a plurality of light-emitting areas;

[0014] The plurality of openings are divided into a plurality of light-transmitting units, each light-transmitting unit including at least one of the openings, and the plurality of light-transmitting units are arranged in an array along the row and column directions.

[0015] In some embodiments, the center distance between two adjacent openings in the row direction is greater than at least twice the arrangement period of the pixel units in the row direction; and / or

[0016] The center distance between two adjacent openings in the column direction is greater than at least one time the arrangement period of the sub-pixels in the column direction.

[0017] In some embodiments, multiple light-emitting areas overlap with the orthographic projection of the same opening onto the cover plate.

[0018] In some embodiments, the light-emitting area and the orthographic projection of the opening on the cover plate overlap in a one-to-one correspondence.

[0019] In some embodiments, in the orthographic projection of the cover plate, the overlapping openings have the same shape as the light-emitting area.

[0020] In some implementations, adjacent rows of the light-transmitting units are staggered in the column direction.

[0021] In some embodiments, the first frame area includes a second trace for transmitting power signals. The second trace overlaps with the orthographic projection of the second display area onto the cover plate, and the main material of the second trace is a transparent conductive material.

[0022] In some embodiments, the first frame area includes a gate driving circuit, which includes multiple gate driving signal lines. In the orthographic projection on the cover plate, the gap width between two adjacent gate driving signal lines that overlap with the second display area is greater than or equal to 10 micrometers and less than or equal to 1000 micrometers.

[0023] In some embodiments, the first display panel is divided into a first overlapping area and a first non-overlapping area, and the second display panel is divided into a second overlapping area and a second non-overlapping area. The first overlapping area and the second overlapping area are projected onto the cover plate. At least one of the following film layers is stacked between the first overlapping area and the second overlapping area: an adhesive layer and a protective layer.

[0024] In some embodiments, the video wall further includes:

[0025] A first filling layer is disposed between the second non-overlapping area and the cover plate, wherein the surface of the first filling layer near the cover plate is flush with the surface of the first display panel near the cover plate;

[0026] A first protective layer includes a first sub-protective layer and a second sub-protective layer. The first sub-protective layer is disposed on the side of the first non-overlapping area away from the cover plate. The second sub-protective layer is disposed between the first overlapping area and the second overlapping area. The thickness of the first sub-protective layer is greater than the thickness of the second protective layer.

[0027] The second protective layer is disposed on the side of the second overlapping area and the second non-overlapping area away from the cover plate, and the surface of the second protective layer away from the cover plate is flush with the surface of the first sub-protective layer away from the cover plate.

[0028] In some embodiments, the video wall further includes:

[0029] A second filling layer is disposed between the second non-overlapping area and the cover plate, wherein the surface of the second filling layer near the cover plate is flush with the surface of the first display panel near the cover plate;

[0030] A third protective layer is disposed on the side of the first overlapping area and the first non-overlapping area away from the cover plate, and the surface of the third protective layer away from the cover plate is flush with the surface of the second filling layer away from the cover plate.

[0031] A third filler layer is disposed on the side of the third protective layer opposite to the first display panel. The orthographic projection of the third filler layer on the first display panel overlaps with the first non-overlapping area. The surface of the third filler layer near the cover plate is flush with the surface of the second display panel near the cover plate.

[0032] A fourth protective layer is disposed on the side of the second overlapping area and the second non-overlapping area away from the cover plate, and the surface of the fourth protective layer away from the cover plate is flush with the surface of the third filling layer away from the cover plate.

[0033] According to a second aspect of this disclosure, a video wall is provided, comprising:

[0034] Cover plate; and

[0035] Multiple display panels are disposed on one side of the cover plate. The multiple display panels include a first display panel and a second display panel spliced ​​together. The first display panel includes a first overlapping area and a first non-overlapping area. The second display panel includes a second overlapping area and a second non-overlapping area. The first overlapping area and the second overlapping area are projected onto the cover plate. The first display panel is located on the side of the second display panel closer to the cover plate.

[0036] Among them, at least one of the following film layers is stacked between the first overlapping area and the second overlapping area: an adhesive layer and a protective layer.

[0037] In some embodiments, the adhesive layer includes a first adhesive layer and a second adhesive layer, wherein the first adhesive layer, the protective layer, and the second adhesive layer are stacked between the first overlap area and the second overlap area.

[0038] In some embodiments, the first display panel includes a first display area and a first border area, the first border area being located on the side of the first display area closer to the second display panel, and the second display panel includes a second display area and a second border area, the second border area being located on the side of the second display area closer to the first display panel;

[0039] Wherein, the first overlapping area includes at least a portion of the first border area, and the second overlapping area includes at least a portion of the second border area; or

[0040] The first overlapping area includes a portion of the first display area near the first border area and the first border area, and the second overlapping area includes a portion of the second display area near the second border area and the second border area.

[0041] According to a third aspect of this disclosure, a display device is provided, including a video wall as described in any one of the claims.

[0042] According to a first aspect of this disclosure, a display driving method is provided, applied to a video wall as provided in any of the first aspects, wherein a second display area is divided into a first sub-display area and a second sub-display area, and in a projection onto the cover plate, the first sub-display area overlaps with the first border area, while the second sub-display area does not overlap with the first border area. The display driving method includes:

[0043] When the splicing screen displays a single grayscale image, the brightness of the first sub-display area is controlled to be greater than or equal to the brightness of the second sub-display area, and the brightness of the second sub-display area is controlled to be greater than the brightness of the first display area.

[0044] The above description is merely an overview of the technical solution disclosed herein. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure are described below.

[0045] Brief description of the attached diagram

[0046] To more clearly illustrate the technical solutions in the embodiments or related technologies of this disclosure, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the scale in the drawings is for illustration only and does not represent the actual scale.

[0047] Figure 1 shows a schematic diagram of the structure of a splicing screen in the related technology;

[0048] Figure 2 shows a cross-sectional structural diagram of the first type of splicing screen provided in this disclosure;

[0049] Figure 3 shows a cross-sectional structural diagram of the second type of splicing screen provided in this disclosure;

[0050] Figure 4 illustrates a schematic cross-sectional structure of the first border region;

[0051] Figure 5 illustrates a schematic diagram of the planar structure of the first display panel;

[0052] Figure 6 illustrates, exemplarily, a first planar structure diagram of the first wiring and the second display area;

[0053] Figure 7 illustrates a second planar structure diagram of the first wiring and the second display area;

[0054] Figure 8 illustrates a third planar structure diagram of the first wiring and the second display area;

[0055] Figure 9 illustrates a fourth planar structure diagram of the first wiring and the second display area;

[0056] Figure 10 shows a cross-sectional structural diagram of the third type of splicing screen provided in this disclosure;

[0057] Figure 11 shows a cross-sectional structural diagram of the fourth type of splicing screen example provided in this disclosure.

[0058] Detailed description

[0059] 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 embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0060] In related technologies, splicing screens have large seams at the splicing positions of adjacent display panels, creating a visually disjointed effect and disrupting the continuity of the displayed image. Figure 1a shows a cross-sectional view of a splicing screen in the related technology, and Figure 1b shows a planar view. As shown in Figure 1, in the arrangement direction of display panels PNL1 and PNL2, the width w1 of the non-display area between display panels PNL1 and PNL2 is greater than or equal to the sum of the border width of display panel PNL1, the physical seam width w0, and the border width of display panel PNL2.

[0061] To reduce or eliminate seams, this disclosure provides a video wall, as shown in Figure 2 or Figure 3. The video wall includes: a cover plate 100; and a plurality of display panels 200 disposed on one side of the cover plate 100. The plurality of display panels 200 include a first display panel 210 and a second display panel 220 spliced ​​together. The first display panel 210 includes a first display area AA1 and a first border area BZ1. The first border area BZ1 is located on the side of the first display area AA1 near the second display panel 220. The second display panel 220 includes a second display area AA2 and a second border area BZ2. The second border area BZ2 is located on the side of the second display area AA2 near the first display panel 210. The first display panel 210 is located on the side of the second display panel 220 near the cover plate 100.

[0062] In the orthographic projection on the cover plate 100, at least a portion of the first border area BZ1 overlaps with the second display area AA2, and the first border area BZ1 overlapping with the second display area AA2 can transmit the display light of the second display area AA2.

[0063] As shown in Figure 2 or Figure 3, the first display panel 210 and the second display panel 220 are arranged along the first direction f1.

[0064] The splicing screen provided in this disclosure has a first border area BZ1 that overlaps with the second display area AA2. The first border area BZ1 that overlaps with the second display area AA2 can transmit the display light emitted from the second display area AA2, so that the first border area BZ1 can also display the image. This can reduce or eliminate the non-display area (i.e., splicing seam) located between the first display panel 210 and the second display panel 220, and achieve a narrow splicing seam or no splicing seam display effect, which is conducive to realizing the integrated display of the splicing screen.

[0065] In specific implementation, a portion or all of the first border area BZ1 can be set to overlap with the orthographic projection of the second display area AA2 on the cover plate 100. That is, in the first direction f1, the width of the splicing seam between the first display panel 210 and the second display panel 220 is greater than or equal to zero and less than the width of the first border area BZ1.

[0066] For example, in the orthographic projection on the cover plate 100, the transmittance of the first border area BZ1, which overlaps with the second display area AA2, is greater than or equal to 20%, 30%, 40%, or 50%, etc. It can be understood that the greater the transmittance of the first border area BZ1, the more display light can pass through, and the better the display effect.

[0067] For example, as shown in Figure 2 or Figure 3, in the orthographic projection on the cover plate 100, the boundary of the first display area AA1 near the first border area BZ1 is aligned with the boundary of the second display area AA2 near the second border area BZ2. In this case, in the first direction f1, the width of the seam between the first display panel 210 and the second display panel 220 is zero, achieving a seamless display effect.

[0068] For example, the display panel 200 can be a liquid crystal display panel, an electronic paper display panel, or a self-emissive display panel, and this disclosure does not limit it. The self-emissive display panel has a built-in light-emitting device, which can be, for example, an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), a mini light-emitting diode (Mini LED), or a micro light-emitting diode (Micro LED), etc.

[0069] When the display panel 200 is a self-emissive display panel, the first display area AA1 includes multiple light-emitting devices, which are driven to emit light by a pixel driving circuit. Correspondingly, the first frame area BZ1 includes multiple traces connected to the pixel driving circuit, as shown in Figures 4 and 5. The multiple traces in the first frame area BZ1 include high-level power signal line VDD, low-level power signal line VSS, and gate driving signal line GOA in the gate driving circuit.

[0070] To improve the transmittance of the first frame area BZ1, for example, as shown in FIG5, the first frame area BZ1 includes a first trace ZX1, which is used to transmit power signals. The first trace ZX1 overlaps with the orthographic projection of the second display area AA2 on the cover plate 100. The main material of the first trace ZX1 is an opaque metal material.

[0071] Among them, the first trace ZX1 is, for example, a high-level power signal line VDD, or a low-level power signal line VSS, etc.

[0072] For example, as shown in any one of Figures 6 to 9, a plurality of mutually spaced openings HL are provided on the first trace ZX1, and the openings HL are used to transmit display light from the second display area AA2.

[0073] Since the opening HL on the first trace ZX1 allows the display light from the second display area AA2 to pass through, the first border area BZ1, which overlaps with the second display area AA2, can display the image.

[0074] For example, as shown in any one of Figures 6 to 9a, the orthographic projection shape of the opening HL on the cover plate 100 includes at least one of the following: a regular or irregular shape such as a strip, a polygon, a circle, an ellipse, and a sector. Among them, a polygon may include, for example, a triangle, a rectangle, a square, a trapezoid, a parallelogram, a rhombus, a pentagon, and a hexagon.

[0075] For example, as shown in b of any one of Figures 6 to 9, the second display area AA2 includes a plurality of pixel units PX arranged along the row direction fh and the column direction fv. Each pixel unit PX includes a plurality of light-emitting regions EMA, such as 3 or 4 light-emitting regions EMA (as shown in Figures 6 to 9).

[0076] For example, multiple light-emitting regions EMA located in the same pixel unit PX may include a red light-emitting region, a green light-emitting region, and a blue light-emitting region, which is not limited in this disclosure.

[0077] For example, as shown in any one of Figures 6 to 9, multiple openings HL are divided into multiple light-transmitting units TU. Each light-transmitting unit TU includes at least one opening HL, and the multiple light-transmitting units TU are arranged in an array along the row direction fh and the column direction fv.

[0078] For example, a light-transmitting unit TU may include one opening HL, as shown in Figure 6 or Figure 7a. A light-transmitting unit TU may also include multiple openings HL, such as four openings HL as shown in Figure 8 or Figure 9a.

[0079] For example, as shown in any one of Figures 6 to 9 (a), adjacent rows of light-transmitting units TU are staggered in the column direction fv. This staggered arrangement of the two rows of light-transmitting units TU improves the display uniformity of the first border area BZ1 and prevents the pattern on the first trace ZX1 from being visible to the naked eye. It should be noted that adjacent rows of light-transmitting units TU can also be aligned in the column direction fv; this disclosure does not limit this arrangement.

[0080] For example, as shown in Figure 6 or Figure 7, the center distance between two adjacent openings HL in the row direction fh is greater than at least one time the arrangement period of the pixel unit PX in the row direction fh.

[0081] For example, as shown in Figure 6 or Figure 7, the center distance between two adjacent openings HL in the column direction fv is greater than at least one times the arrangement period of the sub-pixels in the column direction fv.

[0082] For example, as shown in Figure 6 or Figure 7, multiple light-emitting areas EMA overlap with the orthographic projection of the same opening HL on the cover plate 100.

[0083] For example, in the first direction f1, the width of the first trace ZX1 is, for example, 1 mm, the size of the aperture HL is greater than or equal to 10 micrometers and less than or equal to 500 micrometers, and the center-to-center spacing of the aperture HL is greater than or equal to 10 micrometers and less than or equal to 1000 micrometers.

[0084] For example, in the second direction f2, the size of the opening HL is greater than or equal to 10 micrometers and less than or equal to 500 micrometers, the center-to-center spacing of the opening HL is greater than or equal to 10 micrometers and less than or equal to 1000 micrometers, and the second direction f2 is perpendicular to the first direction f1.

[0085] For example, the first direction f1 is parallel to the column direction fv, and the second direction f2 is parallel to the row direction fh.

[0086] For example, as shown in Figure 8 or Figure 9, the light-emitting area EMA and the orthographic projection of the opening HL on the cover plate 100 overlap one-to-one.

[0087] For example, as shown in FIG8 or FIG9, in the orthographic projection on the cover plate 100, the overlapping openings HL have the same shape as the light-emitting area EMA.

[0088] To improve the transmittance of the first trace ZX1, exemplarily, in the orthographic projection on the cover plate 100, the opening HL covers the light-emitting region EMA. That is, the outline of the opening HL is aligned with the outline of the light-emitting region EMA, or extends outward relative to the outline of the light-emitting region EMA.

[0089] To improve the transmittance of the first border area BZ1, as exemplarily shown in FIG5, the first border area BZ1 includes a second trace ZX2 for transmitting power signals. The second trace ZX2 overlaps with the orthographic projection of the second display area AA2 on the cover plate 100. The main material of the second trace ZX2 is a transparent conductive material.

[0090] Since the main material of the second trace ZX2 is a transparent conductive material, the second trace ZX2 can transmit the display light of the second display area AA2, so that the first border area BZ1, which overlaps with the second display area AA2, can display the image.

[0091] The second trace ZX2 can be, for example, a high-level power signal line VDD, or a low-level power signal line VSS, etc.

[0092] For example, the transparent conductive material may include metal oxides such as ITO, IZO, IGZO, IGO, and ZTO, and may also include silver nanowires. Using metal oxides also improves the oxidation resistance of the second trace ZX2.

[0093] As shown in Figure 5, the first display panel 210 also includes a bonding area BD located on one side of the first display area AA1. The bonding area BD is used to connect an external driving circuit. In order to improve the transmittance of the first border area BZ1, the bonding area BD and the first border area BZ1 are, for example, located on different sides of the first display area AA1.

[0094] For example, in Figure 5, the binding area BD is located below the first display area AA1, and the first border area BZ1 can be located on any side other than the bottom, such as the top, left or right side (as shown in Figure 5).

[0095] To improve the transmittance of the first frame area BZ1, for example, as shown in FIG5, the first frame area BZ1 includes a gate driving circuit, which includes multiple gate driving signal lines GOA. In the orthographic projection on the cover plate 100, the gap width between two adjacent gate driving signal lines GOA that overlap with the second display area AA2 is greater than or equal to 10 micrometers and less than or equal to 1000 micrometers.

[0096] By setting the gap width between the gate drive signal lines GOA within the aforementioned range, the gap between the gate drive signal lines GOA allows the display light from the second display area AA2 to pass through, thereby enabling the first border area BZ1, which overlaps with the second display area AA2, to display an image.

[0097] For example, as shown in FIG2 or FIG3, the first display panel 210 is divided into a first overlapping area 211 and a first non-overlapping area 212, and the second display panel 220 is divided into a second overlapping area 221 and a second non-overlapping area 222. The orthographic projections of the first overlapping area 211 and the second overlapping area 221 on the cover plate 100 coincide.

[0098] In Figures 2 and 3, the first overlapping area 211 includes a portion of the first display area AA1 near the first border area BZ1 and the first border area BZ1, the second overlapping area 221 includes a portion of the second display area AA2 near the second border area BZ2 (i.e., the first sub-display area AA21) and the second border area BZ2, and the second non-overlapping area 222 is the second sub-display area AA22.

[0099] For example, as shown in FIG2 or FIG3, at least one of the following film layers is stacked between the first overlap area 211 and the second overlap area 221: adhesive layer 300 and protective layer 400.

[0100] For example, as shown in FIG2 or FIG3, a first adhesive layer 310, a protective layer 400 and a second adhesive layer 320 are stacked between the first overlap area 211 and the second overlap area 221, with the first adhesive layer 310 disposed close to the first overlap area 211.

[0101] To fill the height difference between the first display panel 210 and the second display panel 220, as exemplarily shown in FIG2, the splicing screen further includes: a first filling layer 501 disposed between the second non-overlapping area 222 and the cover plate 100, wherein the surface of the first filling layer 501 near the cover plate 100 is flush with the surface of the first display panel 210 near the cover plate 100; and a first protective layer 410, including a first sub-protective layer 411 and a second sub-protective layer 412, wherein the first sub-protective layer 411 is disposed between the second non-overlapping area 222 and the cover plate 100. A non-overlapping area 212 is located on the side away from the cover plate 100. A second sub-protective layer 412 is disposed between the first overlapping area 211 and the second overlapping area 221. The thickness of the first sub-protective layer 411 is greater than the thickness of the second sub-protective layer 412. A second protective layer 420 is disposed on the side away from the cover plate 100 of the second overlapping area 221 and the second non-overlapping area 222. The surface of the second protective layer 420 away from the cover plate 100 is flush with the surface of the first sub-protective layer 411 away from the cover plate 100.

[0102] The first protective layer 410 constitutes the back protective film of the first display panel 210, and the second protective layer 420 constitutes the back protective film of the second display panel 220.

[0103] For example, as shown in FIG2, the splicing screen further includes: a first adhesive layer 601 disposed between the first protective layer 410 and the first display panel 210; a second adhesive layer 602 disposed between the second protective layer 420 and the second display panel 220; and a first optical adhesive layer OCA1 disposed between the second display panel 220 and the second sub-protective layer 412, and between the second display panel 220 and the first filler layer 501.

[0104] In Figure 2, the second sub-protective layer 412 is a protective layer 400 disposed between the first overlap area 211 and the second overlap area 221. The first adhesive layer 601 located between the first overlap area 211 and the second overlap area 221 constitutes the first adhesive layer 310, and the first optical adhesive layer OCA1 located between the first overlap area 211 and the second overlap area 221 constitutes the second adhesive layer 320.

[0105] To bridge the gap between the first display panel 210 and the second display panel 220, exemplarily, as shown in FIG2, the thickness of the first filler layer 501 is equal to the sum of the thicknesses of the first display panel 210, the first adhesive layer 601, and the second sub-protective layer 412. The thickness of the first sub-protective layer 411 is equal to the sum of the thicknesses of the second sub-protective layer 412, the first optical adhesive layer OCA1, the second display panel 220, the second adhesive layer 602, and the second protective layer 420.

[0106] To reduce the step difference between the first display panel 210 and the second display panel 220, exemplarily, as shown in FIG2, the thickness of the first adhesive layer 601 is greater than or equal to 10 micrometers and less than or equal to 50 micrometers. The thickness of the second adhesive layer 602 is greater than or equal to 10 micrometers and less than or equal to 50 micrometers. The thickness of the second sub-protective layer 412 is greater than or equal to 10 micrometers and less than or equal to 75 micrometers. The thickness of the second protective layer 420 is greater than or equal to 10 micrometers and less than or equal to 75 micrometers. It can be understood that the smaller the thickness of the first adhesive layer 601, the second adhesive layer 602, the second sub-protective layer 412, and the second protective layer 420, the smaller the step difference between the first display panel 210 and the second display panel 220.

[0107] To bridge the height difference between the first display panel 210 and the second display panel 220, as exemplarily shown in FIG3, the splicing screen further includes: a second filling layer 502 disposed between the second non-overlapping area 222 and the cover plate 100, wherein the surface of the second filling layer 502 near the cover plate 100 is flush with the surface of the first display panel 210 near the cover plate 100; and a third protective layer 430 disposed on the side of the first overlapping area 211 and the first non-overlapping area 212 away from the cover plate 100, wherein the surface of the third protective layer 430 away from the cover plate 100 is flush with the surface of the second filling layer 502 away from the cover plate 100. The third filling layer 503 is disposed on the side of the third protective layer 430 away from the first display panel 210. The orthographic projection of the third filling layer 503 on the first display panel 210 overlaps with the first non-overlapping area 212. The surface of the third filling layer 503 near the cover plate 100 is flush with the surface of the second display panel 220 near the cover plate 100. The fourth protective layer 440 is disposed on the side of the second overlapping area 221 and the second non-overlapping area 222 away from the cover plate 100. The surface of the fourth protective layer 440 away from the cover plate 100 is flush with the surface of the third filling layer 503 away from the cover plate 100.

[0108] The third protective layer 430 constitutes the back protective film of the first display panel 210, and the fourth protective layer 440 constitutes the back protective film of the second display panel 220.

[0109] For example, as shown in FIG3, the splicing screen further includes: a third adhesive layer 603 disposed between the third protective layer 430 and the first display panel 210; and a fourth adhesive layer 604 disposed between the fourth protective layer 440 and the second display panel 220.

[0110] By providing the same structure on the back of the first display panel 210 and the back of the second display panel 220, for example, the structure on the back of the first display panel 210 includes a third adhesive layer 603 and a third protective layer 430 that cover the entire first display panel 210, and the structure on the back of the second display panel 220 includes a fourth adhesive layer 604 and a fourth protective layer 440 that cover the entire second display panel 220, the structural consistency between the first display panel 210 and the second display panel 220 can be improved, thereby simplifying the process.

[0111] For example, as shown in FIG3, the splicing screen further includes: a second optical adhesive layer OCA2, disposed between the second non-overlapping area 222 and the second filling layer 502, between the third protective layer 430 and the third filling layer 503, and between the third protective layer 430 and the second overlapping area 221.

[0112] The process can be further simplified by providing an integral second optical adhesive layer OCA2 between the second non-overlapping area 222 and the second filler layer 502, between the third protective layer 430 and the third filler layer 503, and between the third protective layer 430 and the second overlapping area 221.

[0113] In Figure 3, the third protective layer 430 overlapping the second overlap area 221 is a protective layer 400 disposed between the first overlap area 211 and the second overlap area 221. The third adhesive layer 603 located between the first overlap area 211 and the second overlap area 221 constitutes the first adhesive layer 310, and the second optical adhesive layer OCA2 located between the first overlap area 211 and the second overlap area 221 constitutes the second adhesive layer 320.

[0114] To bridge the gap between the first display panel 210 and the second display panel 220, exemplarily, as shown in FIG3, the thickness of the second filler layer 502 is equal to the sum of the thicknesses of the first display panel 210, the third adhesive layer 603, and the third protective layer 430, and the thickness of the third filler layer 503 is equal to the sum of the thicknesses of the second display panel 220, the fourth adhesive layer 604, and the fourth protective layer 440. The thicknesses of the second filler layer 502 and the third filler layer 503 can be the same.

[0115] To reduce the step difference between the first display panel 210 and the second display panel 220, exemplarily, as shown in FIG3, the thickness of the third adhesive layer 603 is greater than or equal to 10 micrometers and less than or equal to 50 micrometers. The thickness of the fourth adhesive layer 604 is greater than or equal to 10 micrometers and less than or equal to 50 micrometers. The thickness of the third protective layer 430 is greater than or equal to 10 micrometers and less than or equal to 75 micrometers. The thickness of the fourth protective layer 440 is greater than or equal to 10 micrometers and less than or equal to 75 micrometers. It can be understood that the smaller the thickness of the third adhesive layer 603, the third protective layer 430, the fourth adhesive layer 604, and the fourth protective layer 440, the smaller the step difference between the first display panel 210 and the second display panel 220.

[0116] For example, as shown in FIG2 or FIG3, a first polarizer POL is also provided on the side of the first display panel 210 and the first filling layer 501 near the cover plate 100. The first polarizer POL is attached to the cover plate 100 by the third optical adhesive layer OCA3.

[0117] For example, as shown in Figure 2 or Figure 3, the video wall further includes a fifth adhesive layer 605 and a support plate 700 stacked together. In Figure 2, the fifth adhesive layer 605 and the support plate 700 are stacked on the side of the first sub-protective layer 411 and the second protective layer 420 facing away from the cover plate 100, and the support plate 700 is disposed on the side of the fifth adhesive layer 605 facing away from the cover plate 100. In Figure 3, the fifth adhesive layer 605 and the support plate 700 are stacked on the side of the third filler layer 503 and the fourth protective layer 440 facing away from the cover plate 100, and the support plate 700 is disposed on the side of the fifth adhesive layer 605 facing away from the cover plate 100.

[0118] For example, the material of the cover plate 100 includes transparent materials such as glass, polycarbonate, polyethylene terephthalate, polyimide, and cellulose triacetate, and the thickness of the cover plate 100 ranges from 30 to 2000 micrometers.

[0119] For example, the materials of the first optical adhesive layer OCA1, the second optical adhesive layer OCA2, and the third optical adhesive layer OCA3 each independently include optical adhesive materials such as UV adhesive and acrylic, and the thickness range is, for example, 25 to 300 micrometers.

[0120] For example, the materials of the first adhesive layer 601, the second adhesive layer 602, the third adhesive layer 603, the fourth adhesive layer 604, and the fifth adhesive layer 605 each independently include UV adhesive and optical adhesives such as acrylic, and the thickness range is, for example, 25 to 300 micrometers.

[0121] For example, the support plate 700 includes metal sheets such as stainless steel and aluminum, with a thickness ranging from 100 to 2000 micrometers.

[0122] For example, the material of the first filler layer 501 may include transparent materials such as glass, polycarbonate, polyethylene terephthalate, polyimide, and cellulose triacetate. The material of the first filler layer 501 may, for example, be the same as the material of the cover plate 100.

[0123] This disclosure provides a video wall, as shown in any one of Figures 2, 3, 10, and 11. The video wall includes: a cover plate 100; and a plurality of display panels 200 disposed on one side of the cover plate 100. The plurality of display panels 200 include a first display panel 210 and a second display panel 220 spliced ​​together. The first display panel 210 includes a first overlapping area 211 and a first non-overlapping area 212. The second display panel 220 includes a second overlapping area 221 and a second non-overlapping area 222. The orthographic projections of the first overlapping area 211 and the second overlapping area 221 on the cover plate 100 coincide. The first display panel 210 is located on the side of the second display panel 220 closer to the cover plate 100.

[0124] Among them, at least one of the following film layers is stacked between the first overlap area 211 and the second overlap area 221: adhesive layer 300 and protective layer 400.

[0125] For example, the adhesive layer 300 includes a first adhesive layer 310 and a second adhesive layer 320. The first adhesive layer 310, the protective layer 400 and the second adhesive layer 320 are stacked between the first overlap area 211 and the second overlap area 221, and the first adhesive layer 310 is disposed close to the first overlap area 211.

[0126] As shown in any one of Figures 2, 3, 10 and 11, the first display panel 210 includes a first display area AA1 and a first border area BZ1. The first border area BZ1 is located on the side of the first display area AA1 that is close to the second display panel 220. The second display panel 220 includes a second display area AA2 and a second border area BZ2. The second border area BZ2 is located on the side of the second display area AA2 that is close to the first display panel 210.

[0127] For example, as shown in FIG10 or FIG11, the first overlap area 211 includes a portion or all of the first border area BZ1, and the second overlap area 221 includes a portion or all of the second border area BZ2. In this case, in the first direction f1, the width of the seam between the first display panel 210 and the second display panel 220 is greater than or equal to the width of the first border area BZ1, and less than the sum of the widths of the first border area BZ1 and the second border area BZ2.

[0128] In Figures 10 and 11, the inner boundary of the first border area BZ1 near the first display area AA1 is aligned with the outer boundary of the second border area BZ2 away from the second display area AA2. In this case, in the first direction f1, the width of the splicing seam between the first display panel 210 and the second display panel 220 is equal to the width of the first border area BZ1.

[0129] For example, as shown in Figure 2 or Figure 3, the first overlapping area 211 includes a portion of the first display area AA1 near the first border area BZ1 and the first border area BZ1, and the second overlapping area 221 includes a portion of the second display area AA2 near the second border area BZ2 (i.e., the first sub-display area AA21) and the second border area BZ2. Furthermore, the first border area BZ1 overlapping the second display area AA2 can be configured to allow the display light from the second display area AA2 to pass through, which can further reduce the seam width.

[0130] In Figures 2 and 3, the first display area AA1 is near the boundary of the first border area BZ1, and the second display area AA2 is aligned with the boundary of the second border area BZ2. In this case, in the first direction f1, the width of the seam between the first display panel 210 and the second display panel 220 is zero, achieving a seamless display effect.

[0131] To fill the height difference between the first display panel 210 and the second display panel 220, exemplarily, as shown in FIG2 or FIG10, the splicing screen further includes: a first filling layer 501 disposed between the second non-overlapping area 222 and the cover plate 100, wherein the surface of the first filling layer 501 near the cover plate 100 is flush with the surface of the first display panel 210 near the cover plate 100; and a first protective layer 410, including a first sub-protective layer 411 and a second sub-protective layer 412, wherein the first sub-protective layer 411 is disposed... On the side of the first non-overlapping area 212 away from the cover plate 100, a second sub-protective layer 412 is disposed between the first overlapping area 211 and the second overlapping area 221, and the thickness of the first sub-protective layer 411 is greater than the thickness of the second sub-protective layer 412; and a second protective layer 420 is disposed on the side of the second overlapping area 221 and the second non-overlapping area 222 away from the cover plate 100, and the surface of the second protective layer 420 away from the cover plate 100 is flush with the surface of the first sub-protective layer 411 away from the cover plate 100.

[0132] The first protective layer 410 constitutes the back protective film of the first display panel 210, and the second protective layer 420 constitutes the back protective film of the second display panel 220.

[0133] For example, as shown in FIG2 or FIG10, the splicing screen further includes: a first adhesive layer 601 disposed between the first protective layer 410 and the first display panel 210; a second adhesive layer 602 disposed between the second protective layer 420 and the second display panel 220; and a first optical adhesive layer OCA1 disposed between the second display panel 220 and the second sub-protective layer 412, and between the second display panel 220 and the first filler layer 501.

[0134] In Figure 2 or Figure 10, the second sub-protective layer 412 is a protective layer 400 disposed between the first overlap area 211 and the second overlap area 221. The first adhesive layer 601 located between the first overlap area 211 and the second overlap area 221 constitutes the first adhesive layer 310, and the first optical adhesive layer OCA1 located between the first overlap area 211 and the second overlap area 221 constitutes the second adhesive layer 320.

[0135] For example, as shown in FIG2 or FIG10, the thickness of the first filler layer 501 is equal to the sum of the thicknesses of the first display panel 210, the first adhesive layer 601, and the second sub-protective layer 412. The thickness of the first sub-protective layer 411 is equal to the sum of the thicknesses of the second sub-protective layer 412, the first optical adhesive layer OCA1, the second display panel 220, the second adhesive layer 602, and the second protective layer 420.

[0136] To reduce the step difference between the first display panel 210 and the second display panel 220, exemplarily, as shown in FIG2 or FIG10, the thickness of the first adhesive layer 601 is greater than or equal to 10 micrometers and less than or equal to 50 micrometers. The thickness of the second adhesive layer 602 is greater than or equal to 10 micrometers and less than or equal to 50 micrometers. The thickness of the second sub-protective layer 412 is greater than or equal to 10 micrometers and less than or equal to 75 micrometers. The thickness of the second protective layer 420 is greater than or equal to 10 micrometers and less than or equal to 75 micrometers. It can be understood that the smaller the thickness of the first adhesive layer 601, the second adhesive layer 602, the second sub-protective layer 412, and the second protective layer 420, the smaller the step difference between the first display panel 210 and the second display panel 220.

[0137] To bridge the height difference between the first display panel 210 and the second display panel 220, exemplarily, as shown in FIG3 or FIG11, the splicing screen further includes: a second filling layer 502 disposed between the second non-overlapping area 222 and the cover plate 100, wherein the surface of the second filling layer 502 near the cover plate 100 is flush with the surface of the first display panel 210 near the cover plate 100; and a third protective layer 430 disposed on the side of the first overlapping area 211 and the first non-overlapping area 212 away from the cover plate 100, wherein the surface of the third protective layer 430 away from the cover plate 100 is flush with the surface of the second filling layer 502 away from the cover plate 100. The surfaces are flush; a third filling layer 503 is disposed on the side of the third protective layer 430 away from the first display panel 210, the orthographic projection of the third filling layer 503 on the first display panel 210 overlaps with the first non-overlapping area 212, and the surface of the third filling layer 503 near the cover plate 100 is flush with the surface of the second display panel 220 near the cover plate 100; and a fourth protective layer 440 is disposed on the side of the second overlapping area 221 and the second non-overlapping area 222 away from the cover plate 100, and the surface of the fourth protective layer 440 away from the cover plate 100 is flush with the surface of the third filling layer 503 away from the cover plate 100.

[0138] The third protective layer 430 constitutes the back protective film of the first display panel 210, and the fourth protective layer 440 constitutes the back protective film of the second display panel 220.

[0139] For example, as shown in FIG3 or FIG11, the splicing screen further includes: a third adhesive layer 603 disposed between the third protective layer 430 and the first display panel 210; and a fourth adhesive layer 604 disposed between the fourth protective layer 440 and the second display panel 220.

[0140] By providing the same structure on the back of the first display panel 210 and the back of the second display panel 220, for example, the structure on the back of the first display panel 210 includes a third adhesive layer 603 and a third protective layer 430 that cover the entire first display panel 210, and the structure on the back of the second display panel 220 includes a fourth adhesive layer 604 and a fourth protective layer 440 that cover the entire second display panel 220, the structural consistency between the first display panel 210 and the second display panel 220 can be improved, thereby simplifying the process.

[0141] For example, as shown in FIG3 or FIG11, the splicing screen further includes: a second optical adhesive layer OCA2, disposed between the second non-overlapping area 222 and the second filling layer 502, between the third protective layer 430 and the third filling layer 503, and between the third protective layer 430 and the second overlapping area 221.

[0142] The process can be further simplified by providing an integral second optical adhesive layer OCA2 between the second non-overlapping area 222 and the second filler layer 502, between the third protective layer 430 and the third filler layer 503, and between the third protective layer 430 and the second overlapping area 221.

[0143] In Figure 3 or Figure 11, the third protective layer 430 overlapping the second overlap area 221 is a protective layer 400 disposed between the first overlap area 211 and the second overlap area 221. The third adhesive layer 603 located between the first overlap area 211 and the second overlap area 221 constitutes the first adhesive layer 310, and the second optical adhesive layer OCA2 located between the first overlap area 211 and the second overlap area 221 constitutes the second adhesive layer 320.

[0144] For example, as shown in FIG3 or FIG11, the thickness of the second filler layer 502 is equal to the sum of the thicknesses of the first display panel 210, the third adhesive layer 603, and the third protective layer 430, and the thickness of the third filler layer 503 is equal to the sum of the thicknesses of the second display panel 220, the fourth adhesive layer 604, and the fourth protective layer 440. The thicknesses of the second filler layer 502 and the third filler layer 503 can be the same.

[0145] To reduce the step difference between the first display panel 210 and the second display panel 220, exemplarily, as shown in FIG3 or FIG11, the thickness of the third adhesive layer 603 is greater than or equal to 10 micrometers and less than or equal to 50 micrometers. The thickness of the fourth adhesive layer 604 is greater than or equal to 10 micrometers and less than or equal to 50 micrometers. The thickness of the third protective layer 430 is greater than or equal to 10 micrometers and less than or equal to 75 micrometers. The thickness of the fourth protective layer 440 is greater than or equal to 10 micrometers and less than or equal to 75 micrometers. It can be understood that the smaller the thickness of the third adhesive layer 603, the third protective layer 430, the fourth adhesive layer 604, and the fourth protective layer 440, the smaller the step difference between the first display panel 210 and the second display panel 220.

[0146] For example, as shown in FIG10 or FIG11, ink 800 may also be provided between cover plate 100 and third optical adhesive layer OCA3. In the orthographic projection on cover plate 100, ink 800 at least covers the overlapping area of ​​first overlapping area 211 and second overlapping area 221. Ink 800 is used to cover the overlapping area.

[0147] This disclosure also provides a display device, including a video wall as provided in any exemplary embodiment.

[0148] Those skilled in the art will understand that the display device provided in this disclosure has the advantages of the above-mentioned splicing screen.

[0149] The display device disclosed herein can be any product or component with display function, such as a display module, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, in-vehicle display device, smartwatch, fitness wristband, personal digital assistant, etc.

[0150] This disclosure provides a display driving method applied to a splicing screen as provided in any exemplary embodiment, as shown in FIG2 or FIG3. The second display area AA2 is divided into a first sub-display area AA21 and a second sub-display area AA22. In the orthographic projection on the cover plate 100, the first sub-display area AA21 overlaps with the first border area BZ1, and the second sub-display area AA22 does not overlap with the first border area BZ1. The display driving method includes: when the splicing screen displays a single grayscale image, controlling the brightness of the first sub-display area AA21 to be greater than or equal to the brightness of the second sub-display area AA22, and controlling the brightness of the second sub-display area AA22 to be greater than the brightness of the first display area AA1.

[0151] As shown in Figure 2 or Figure 3, since a first border area BZ1 is provided between the first sub-display area AA21 and the cover plate 100, and a filling structure 501 / 502 is provided between the second sub-display area AA22 and the cover plate 100, the structures between the first sub-display area AA21, the second sub-display area AA22, and the first display area AA1 and the cover plate 100 are different. Therefore, the transmittance of the display light emitted by the first sub-display area AA21, the second sub-display area AA22, and the first display area AA1 is different. Moreover, the transmittance of the display light emitted by the first display area AA1 is greater than that of the second sub-display area AA22, and the transmittance of the display light emitted by the second sub-display area AA22 is greater than or equal to that of the first sub-display area AA21.

[0152] When the splicing screen displays a single grayscale image, by controlling the brightness of the first sub-display area AA21 to be greater than or equal to the brightness of the second sub-display area AA22, and the brightness of the second sub-display area AA22 to be greater than the brightness of the first display area AA1, it is beneficial to improve the uniformity of the splicing screen's image display.

[0153] For example, the brightness of the first sub-display area AA21, the second sub-display area AA22, and the first display area AA1 can be adjusted proportionally according to the transmittance ratio of the display light emitted by the first sub-display area AA21, the second sub-display area AA22, and the first display area AA1.

[0154] For example, the transmittance of the first sub-display area AA21 is 1 / A of the transmittance of the first display area AA1, and the transmittance of the second sub-display area AA22 is 1 / B of the transmittance of the first display area AA1. When the splicing screen displays a single grayscale image, the brightness of the first sub-display area AA21 can be controlled to be A times the brightness of the first display area AA1, and the brightness of the second sub-display area AA22 can be controlled to be B times the brightness of the first display area AA1.

[0155] In this disclosure, "multiple" means two or more, and "at least one" means one or more, unless otherwise expressly and specifically defined.

[0156] In this disclosure, the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this disclosure.

[0157] In this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0158] The terms "an embodiment," "some embodiments," "exemplary embodiments," "one or more embodiments," "example," "one example," "some examples," etc., used in this disclosure are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

[0159] In this disclosure, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0160] In this specification, "electrical connection" and "coupling" include situations where components are connected together by elements that have some electrical function. There are no particular limitations on what constitutes an "electrical function," as long as it allows for the transmission and reception of electrical signals between the connected components. Examples of "electrical functions" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other components with various functions.

[0161] In this specification, the term "same-layer arrangement" refers to a structure formed by patterning two (or more) structures through the same patterning process, and their materials may be the same or different. For example, the precursors forming multiple structures in a same-layer arrangement may be made of the same material, while the final materials may be the same or different.

[0162] The polygons used in this specification are not strictly defined; they can be approximate triangles, rectangles, trapezoids, pentagons, or hexagons, etc. They may have minor deformations due to tolerances, and may include chamfers, fillets, curved edges, and other variations.

[0163] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0164] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0165] The use of “for” or “configured to” in this disclosure implies an open and inclusive language that does not preclude applicability to or configuration to devices for performing additional tasks or steps.

[0166] As used in this disclosure, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0167] As used in this disclosure, "parallel," "perpendicular," "equal," and "flush" include the described situation and situations that are similar to the described situation, within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein an acceptable deviation range for approximate parallelism may be, for example, within 10° or 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein an acceptable deviation range for approximate perpendicularity may also be, for example, within 10° or 5°. "Equal" includes absolute equality and approximate equality, wherein an acceptable deviation range for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one. "Flush" includes absolute flush and approximate flush, wherein an acceptable deviation range for approximate flush may be, for example, a distance between the flushes being less than or equal to 5% of either one's dimension.

[0168] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0169] This disclosure describes exemplary embodiments with reference to cross-sectional views and / or plan views as idealized exemplary drawings. In the drawings, the thickness of layers and regions is enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown in this disclosure, but rather include shape deviations due to, for example, manufacturing processes. For example, etched regions shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0170] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A video wall, comprising: Cover plate; as well as Multiple display panels are disposed on one side of the cover plate. The multiple display panels include a first display panel and a second display panel spliced ​​together. The first display panel includes a first display area and a first border area. The first border area is located on the side of the first display area closer to the second display panel. The second display panel includes a second display area and a second border area. The second border area is located on the side of the second display area closer to the first display panel. In the orthographic projection on the cover plate, at least a portion of the first border area overlaps with the second display area, and the first border area overlapping with the second display area is able to transmit the display light of the second display area. The first display panel is located on the side of the second display panel closer to the cover plate.

2. The splicing screen according to claim 1, wherein, In the orthographic projection on the cover plate, the first display area is near the boundary of the first border area and aligned with the boundary of the second display area near the second border area.

3. The splicing screen according to claim 1, wherein, In the orthographic projection on the cover plate, the transmittance of the first border area that overlaps with the second display area is greater than or equal to 20%.

4. The splicing screen according to claim 1, wherein, The first frame area includes a first trace for transmitting power signals. The first trace overlaps with the orthographic projection of the second display area on the cover plate. The main material of the first trace is metal. The first trace has multiple openings that are separated from each other, and the openings are used to transmit display light from the second display area.

5. The splicing screen according to claim 4, wherein, The second display area includes a plurality of pixel units arranged along the row and column directions, and each pixel unit includes a plurality of light-emitting areas; The plurality of openings are divided into a plurality of light-transmitting units, each light-transmitting unit including at least one of the openings, and the plurality of light-transmitting units are arranged in an array along the row and column directions.

6. The splicing screen according to claim 5, wherein, The center distance between two adjacent openings in the row direction is greater than at least twice the arrangement period of the pixel units in the row direction; and / or The center distance between two adjacent openings in the column direction is greater than at least one time the arrangement period of the sub-pixels in the column direction.

7. The splicing screen according to claim 5, wherein, Multiple light-emitting areas overlap with the orthographic projection of the same opening on the cover plate.

8. The splicing screen according to claim 5, wherein, The light-emitting area and the orthographic projection of the opening on the cover plate correspond one-to-one and overlap.

9. The splicing screen according to claim 8, wherein, In the orthographic projection of the cover plate, the overlapping openings have the same shape as the light-emitting area.

10. The splicing screen according to claim 5, wherein, The light-transmitting units in two adjacent rows are staggered in the column direction.

11. The splicing screen according to claim 1, wherein, The first frame area includes a second trace, which is used to transmit power signals. The second trace overlaps with the orthographic projection of the second display area on the cover plate. The main material of the second trace is a transparent conductive material.

12. The splicing screen according to claim 1, wherein, The first frame area includes a gate driving circuit, which includes multiple gate driving signal lines. In the orthographic projection on the cover plate, the gap width between two adjacent gate driving signal lines that overlap with the second display area is greater than or equal to 10 micrometers and less than or equal to 1000 micrometers.

13. The video wall according to any one of claims 1 to 12, wherein, The first display panel is divided into a first overlapping area and a first non-overlapping area, and the second display panel is divided into a second overlapping area and a second non-overlapping area. The first overlapping area and the second overlapping area are projected onto the cover plate. At least one of the following film layers is stacked between the first overlapping area and the second overlapping area: an adhesive layer and a protective layer.

14. The splicing screen according to claim 13, wherein, The video wall also includes: A first filling layer is disposed between the second non-overlapping area and the cover plate, wherein the surface of the first filling layer near the cover plate is flush with the surface of the first display panel near the cover plate; A first protective layer includes a first sub-protective layer and a second sub-protective layer. The first sub-protective layer is disposed on the side of the first non-overlapping area away from the cover plate. The second sub-protective layer is disposed between the first overlapping area and the second overlapping area. The thickness of the first sub-protective layer is greater than the thickness of the second protective layer. The second protective layer is disposed on the side of the second overlapping area and the second non-overlapping area away from the cover plate, and the surface of the second protective layer away from the cover plate is flush with the surface of the first sub-protective layer away from the cover plate.

15. The video wall according to claim 13, wherein, The video wall also includes: A second filling layer is disposed between the second non-overlapping area and the cover plate, wherein the surface of the second filling layer near the cover plate is flush with the surface of the first display panel near the cover plate; A third protective layer is disposed on the side of the first overlapping area and the first non-overlapping area away from the cover plate, and the surface of the third protective layer away from the cover plate is flush with the surface of the second filling layer away from the cover plate. A third filler layer is disposed on the side of the third protective layer opposite to the first display panel. The orthographic projection of the third filler layer on the first display panel overlaps with the first non-overlapping area. The surface of the third filler layer near the cover plate is flush with the surface of the second display panel near the cover plate. A fourth protective layer is disposed on the side of the second overlapping area and the second non-overlapping area away from the cover plate, and the surface of the fourth protective layer away from the cover plate is flush with the surface of the third filling layer away from the cover plate.

16. A video wall, comprising: Cover plate; as well as Multiple display panels are disposed on one side of the cover plate. The multiple display panels include a first display panel and a second display panel spliced ​​together. The first display panel includes a first overlapping area and a first non-overlapping area. The second display panel includes a second overlapping area and a second non-overlapping area. The first overlapping area and the second overlapping area are projected onto the cover plate. The first display panel is located on the side of the second display panel closer to the cover plate. Among them, at least one of the following film layers is stacked between the first overlapping area and the second overlapping area: an adhesive layer and a protective layer.

17. The video wall according to claim 16, wherein, The adhesive layer includes a first adhesive layer and a second adhesive layer, and the first adhesive layer, the protective layer, and the second adhesive layer are stacked between the first overlap area and the second overlap area.

18. The video wall according to claim 16 or 17, wherein, The first display panel includes a first display area and a first border area, the first border area being located on the side of the first display area closer to the second display panel; the second display panel includes a second display area and a second border area, the second border area being located on the side of the second display area closer to the first display panel. Wherein, the first overlapping area includes at least a portion of the first border area, and the second overlapping area includes at least a portion of the second border area; or The first overlapping area includes a portion of the first display area near the first border area and the first border area, and the second overlapping area includes a portion of the second display area near the second border area and the second border area.

19. A display device comprising a video wall as described in any one of claims 1 to 18.

20. A display driving method applied to a splicing screen as described in any one of claims 1 to 15, wherein the second display area is divided into a first sub-display area and a second sub-display area, and in the orthographic projection onto the cover plate, the first sub-display area overlaps with the first border area, and the second sub-display area does not overlap with the first border area, the display driving method comprising: When the splicing screen displays a single grayscale image, the brightness of the first sub-display area is controlled to be greater than or equal to the brightness of the second sub-display area, and the brightness of the second sub-display area is controlled to be greater than the brightness of the first display area.

Images