Tiled display panel

Abstract

Disclosed is a tiled display panel (100). A compensation display panel (12) is arranged on light incident sides of two adjacent liquid crystal panels (11), and blocks a tiling seam (pf); the side of a first substrate (111) of each liquid crystal panel (11) away from a liquid crystal layer (112) is provided with a recess (11a), and the recess (11a) is arranged in a non-display area (NA) of the liquid crystal panel (11); in the two adjacent liquid crystal panels (11), the recess (11a) of one liquid crystal panel (11) and the recess (11a) of the other liquid crystal panel (11) are oppositely arranged and are tiled and communicated to form a positioning recess (10a), and the compensation display panel (12) is arranged in the positioning recess (10a).

Description

spliced ​​display panels Technical Field

[0001] The present application relates to the field of display technology, and in particular to a spliced ​​display panel. Background Art

[0002] In the technology of splicing MLED (Mini-LED / Micro-LED) light panels onto LCD panels, the MLED light panel is placed at the seam between two adjacent LCD panels to conceal the seam. Typically, the MLED light panel is placed on the light-emitting or light-incoming side of the LCD panels. To ensure smoothness, the MLED light panel is typically placed on the light-incoming side of two adjacent LCD panels to eliminate the seam.

[0003] However, due to the MLED light board attachment tolerance problem, there is a large light leakage area between the MLED light board and the display area of ​​the LCD panel, so that part of the light emitted by the backlight module located on the light incident side of the LCD panel can be emitted through the light leakage area. Especially when viewed from the side, the light leakage is more obvious. SUMMARY OF THE INVENTION

[0004] The embodiments of the present application provide a spliced ​​display panel, which can reduce the risk of light leakage in the splicing area.

[0005] An embodiment of the present application provides a spliced ​​display panel, comprising:

[0006] At least two liquid crystal panels, wherein two adjacent liquid crystal panels are spliced ​​together, and a seam is formed between the two adjacent liquid crystal panels; and

[0007] a compensation display panel, the compensation display panel being arranged on the light incident side of two adjacent liquid crystal panels and covering the joint;

[0008] The liquid crystal panel comprises a first substrate, a liquid crystal layer, and a second substrate stacked in sequence, wherein the first substrate is a light incident side of the liquid crystal panel, and a groove is provided on a side of the first substrate away from the liquid crystal layer, wherein the groove is provided in a non-display area of ​​the liquid crystal panel;

[0009] In two adjacent liquid crystal panels, the groove of one liquid crystal panel and the groove of the other liquid crystal panel are arranged opposite to each other and connected to form a positioning groove, and the compensation display panel is arranged in the positioning groove.

[0010] Optionally, in some embodiments of the present application, the depth of the groove is between 0.2 mm and 0.4 mm.

[0011] Optionally, in some embodiments of the present application, the distance from the edge of the display area of ​​the liquid crystal panel to the side wall of the adjacent positioning groove is less than or equal to 50 microns, and the distance from the edge of the display area of ​​the liquid crystal panel to the side wall of the compensation display panel is less than or equal to 100 microns.

[0012] Optionally, in some embodiments of the present application, the first substrate includes a first substrate and a thin film transistor structure layer arranged on a side of the first substrate close to the liquid crystal layer, and the groove is arranged on a side of the first substrate away from the liquid crystal layer.

[0013] Optionally, in some embodiments of the present application, the thin film transistor structure layer includes a light shielding layer provided on the first substrate, and the thin film transistor is provided on the light shielding layer;

[0014] The shading layer is arranged in the display area of ​​the liquid crystal panel, and is also arranged on the side close to the non-display area at the junction of the non-display area and the display area. In the orthographic projection direction of the spliced ​​display panel, the shading layer is located on the periphery of the compensation display panel and between the boundary of the compensation display panel and the display area of ​​the liquid crystal panel.

[0015] Optionally, in some embodiments of the present application, the compensation display panel is arranged in the positioning groove by optical glue, the refractive index of the optical glue is greater than the refractive index of the first substrate, the positioning groove includes a first surface and a second surface connected to both sides of the first surface, the first surface is arranged opposite to the display surface of the compensation display panel, the optical glue is bonded to the first surface to form a total reflection interface, and the total reflection interface is located at least in the two side areas of the first surface.

[0016] Optionally, in some embodiments of the present application, the compensation display panel is arranged in the positioning groove by optical glue, the refractive index of the optical glue is smaller than the refractive index of the first substrate, the positioning groove includes a first surface and a second surface connected to both sides of the first surface, the first surface is arranged opposite to the display surface of the compensation display panel, and the optical glue is bonded to the second surface to form a total reflection interface.

[0017] Optionally, in some embodiments of the present application, the compensation display panel is arranged in the positioning groove by optical glue, and the positioning groove includes a first surface and a second surface connected to both sides of the first surface, the first surface is arranged opposite to the display surface of the compensation display panel, and a light-blocking layer is arranged on the second surface.

[0018] Optionally, in some embodiments of the present application, the liquid crystal panel further includes a transparent frame glue, which is arranged around the periphery of the liquid crystal layer and between the first substrate and the second substrate. The frame glue is located in the non-display area of ​​the liquid crystal panel, and the frame glue is arranged to overlap with the groove.

[0019] Optionally, in some embodiments of the present application, the second substrate includes a second substrate and a black matrix layer provided on a side of the second substrate close to the liquid crystal layer, the black matrix layer covers a display area and a non-display area of ​​the liquid crystal panel, and the compensation display panel includes a base and a pixel device provided on a side of the base close to the second substrate;

[0020] In the orthographic projection direction of the spliced ​​display panel, the black matrix layer is arranged between the pixel devices.

[0021] Optionally, in some embodiments of the present application, the joint is filled with packaging glue, the packaging glue is connected to the frame glue, and the refractive index of the packaging glue is the same as the refractive index of the frame glue.

[0022] Optionally, in some embodiments of the present application, the spliced ​​display panel further includes a first polarizer and a second polarizer, the first polarizer is disposed on a side of the first substrate away from the liquid crystal layer, the first polarizer is provided with an opening, the opening overlaps with and is in communication with the groove, and the compensation display panel is disposed in the opening;

[0023] The second polarizer is disposed on a side of the second substrate away from the liquid crystal layer. The second polarizer covers the display area and the non-display area of ​​the liquid crystal panel. The second polarizer is overlapped with the compensation display panel.

[0024] Optionally, in some embodiments of the present application, the second substrate further includes a color filter layer disposed on a side of the second substrate close to the liquid crystal layer, and the color filter layer is disposed between the black matrix layers.

[0025] Optionally, in some embodiments of the present application, the pixel device includes one of a Mini-LED, a Micro-LED and an OLED device. Beneficial effects

[0026] The spliced ​​display panel of the embodiment of the present application includes at least two liquid crystal panels and at least one compensation display panel, and the two adjacent liquid crystal panels are spliced ​​together, and there is a splicing seam between the two adjacent liquid crystal panels; the compensation display panel is arranged on the light incident side of the two adjacent liquid crystal panels and blocks the splicing seam; the liquid crystal panel includes a first substrate, a liquid crystal layer, and a second substrate stacked in sequence, the first substrate is the light incident side of the liquid crystal panel, and a groove is provided on the side of the first substrate away from the liquid crystal layer, and the groove is provided in the non-display area of ​​the liquid crystal panel; in the two adjacent liquid crystal panels, the groove of one liquid crystal panel and the groove of the other liquid crystal panel are arranged opposite to each other and spliced ​​and connected to form a positioning groove, and the compensation display panel is provided in the positioning groove.

[0027] The splicing display panel of the embodiment of the present application is provided with a positioning groove at the splicing area of ​​the liquid crystal panel, and the compensation display panel is arranged in the positioning groove, thereby avoiding the risk of excessive offset of the compensation display panel due to attachment error, resulting in an excessive distance between the compensation display panel and the display area of ​​the liquid crystal panel, that is, improving the attachment accuracy of the compensation display panel, reducing the risk of excessive distance between the compensation display panel and the display area of ​​the liquid crystal panel, thereby reducing the risk of backlight leakage; in addition, the compensation display panel is arranged in the positioning groove, and the compensation display panel serves to block part of the large-angle light emitted by the backlight, further reducing the risk of light leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic structural diagram of a spliced ​​display panel provided in Example 1 of the present application;

[0029] FIG2 is an enlarged view of portion M in FIG1 ;

[0030] FIG3 is a schematic structural diagram of a spliced ​​display panel provided in Example 2 of the present application;

[0031] FIG4 is an enlarged view of portion N in FIG3 ;

[0032] FIG5 is a schematic structural diagram of a spliced ​​display panel provided in Example 3 of the present application;

[0033] FIG6 is an enlarged view of portion K in FIG5 . Modes for Carrying Out the Invention

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device; the terms "first", "second", "third", etc. are used only as labels and do not impose numerical requirements or establish an order.

[0035] The present application provides a spliced ​​display panel, which is described in detail below. It should be noted that the order of description of the following embodiments does not limit the preferred order of the embodiments.

[0036] Example 1

[0037] 1 and 2 , an embodiment of the present application provides a spliced ​​display panel 100, which includes at least two liquid crystal panels 11 and at least one compensation display panel 12. The liquid crystal panel 11 includes a display area AA and a non-display area NA, which is located on at least one side of the display area AA.

[0038] Two adjacent liquid crystal panels 11 are spliced ​​together. There is a seam pf between the two adjacent liquid crystal panels 11. The compensation display panel 12 is arranged on the light incident side of the two adjacent liquid crystal panels 11 and blocks the seam pf. The liquid crystal panel 11 includes a first substrate 111, a liquid crystal layer 112, and a second substrate 113 stacked in sequence, and the first substrate 111 is the light incident side of the liquid crystal panel 11. A groove 11a is provided on the side of the first substrate 111 away from the liquid crystal layer 112. The groove 11a is provided in the non-display area NA of the liquid crystal panel 11. In the two adjacent liquid crystal panels 11, the groove 11a of one liquid crystal panel 11 and the groove 11a of the other liquid crystal panel 11 are arranged opposite to each other and spliced ​​and connected to form a positioning groove 10a. The compensation display panel 12 is provided in the positioning groove 10a.

[0039] It should be noted that, in order for the liquid crystal panel 11 to realize the display function, a backlight module needs to be provided on the light incident side of the liquid crystal panel 11. The backlight module provides a surface light source for the liquid crystal panel 11.

[0040] The compensation display panel 12 is disposed in the non-display area NA of the liquid crystal panel 11. The portion of the liquid crystal panel 11 that is in the non-display area NA is transparent to the display image of the compensation display panel 12.

[0041] In related technologies, when an LED (light-emitting diode) display panel is attached to the joint of two adjacent liquid crystal panels, the edge of the LED display panel is a certain distance from the display area of ​​the liquid crystal panels. If this distance is too large due to attachment errors, causing the LED display panel to shift, light from the backlight module can pass through the area between the LED display panel and the liquid crystal panel's display area, causing light leakage. This distance is limited by the attachment accuracy of the LED display panel, which has an attachment error of ±0.15 mm.

[0042] The splicing display panel 100 of the embodiment of the present application is provided with a positioning groove 10a at the splicing area of ​​the liquid crystal panel 11, and the compensation display panel 12 is provided in the positioning groove 10a. Due to the provision of the positioning groove 10a, the attachment of the compensation display panel 12 is more precise, thereby reducing the risk of excessive distance between the compensation display panel 12 and the display area AA of the liquid crystal panel 11, thereby reducing the risk of light leakage from the backlight module.

[0043] Furthermore, because the backlight module is positioned on the side of the first polarizer 151 away from the liquid crystal layer 112, some of the high-angle light emitted by the backlight module is blocked by the compensation display panel 12. Compared to when the compensation display panel 12 is positioned directly on the flat array substrate, when the compensation display panel 12 is positioned within the positioning groove 10a, the compensation display panel 12 blocks more high-angle light emitted by the backlight, further reducing the risk of backlight leakage. For example, when the compensation display panel 12 is positioned on the flat array substrate, the compensation display panel 12 can block light with an exit angle of more than 160 degrees. However, when the compensation display panel 12 is positioned within the positioning groove 10a, because the compensation display panel 12 is moved a certain distance toward the light exit direction, the compensation display panel 12 can block light with an exit angle of more than 150 degrees. Consequently, the compensation display panel 12 can block even more high-angle light, further reducing the risk of backlight leakage.

[0044] Alternatively, in one embodiment, the depth of the groove 11a is between 0.15 mm and 0.4 mm. For example, the depth of the groove 11a can be 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.30 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm, 0.36 mm, 0.37 mm, 0.38 mm, 0.39 mm, or 0.40 mm.

[0045] It should be understood that if the depth of the groove 11a is too deep, the support performance of the first substrate 1a1 will be reduced. If the depth of the groove 11a is too shallow, the compensation display panel 12 will not be able to be placed in the groove 11a, and the precise bonding effect cannot be achieved. Therefore, the above-mentioned depth of the groove 11a can ensure the support performance of the first substrate 1a1 and allow the compensation display panel 12 to be accurately attached to the groove 11a.

[0046] Optionally, the groove 11 a is formed on the first substrate 1 a 1 by using a photolithography process.

[0047] Optionally, the distance from the edge of the display area AA of the liquid crystal panel 11 to the side wall of the adjacent positioning groove 11a is less than or equal to 50 microns, for example, it can be 0 microns, 5 microns, 10 microns, 15 microns, 20 microns, 25 microns, 30 microns, 35 microns, 40 microns, 45 microns or 50 microns.

[0048] The distance from the edge of the display area AA of the liquid crystal panel 11 to the side wall of the compensation display panel 12 is less than or equal to 100 microns, for example, it can be 0 microns, 5 microns, 10 microns, 15 microns, 20 microns, 25 microns, 30 microns, 35 microns, 40 microns, 45 microns, 50 microns, 55 microns, 60 microns, 65 microns, 70 microns, 75 microns, 80 microns, 85 microns, 90 microns, 95 microns or 100 microns.

[0049] Optionally, the material of the first substrate 1a1 includes but is not limited to one of glass, sapphire and silicon.

[0050] Optionally, the liquid crystal panel 11 may be a conventional panel, a COA (color filter on array substrate) panel, or a BOA (black matrix on array substrate) panel. This embodiment uses a conventional liquid crystal panel 11 as an example, where the first substrate 111 is an array substrate and the second substrate is a color filter substrate.

[0051] Optionally, the compensation display panel 12 may be a Mini-LED panel, a Micro-LED panel, an OLED panel, a QLED panel, or the like.

[0052] Optionally, in one embodiment, the first substrate 111 includes a first underlayer 1a1 and a thin film transistor structure layer 1a2 disposed on a side of the first substrate 1a1 close to the liquid crystal layer 112. The groove 11a is disposed on a side of the first substrate 1a1 away from the liquid crystal layer 112.

[0053] Alternatively, the groove 11a can be formed by etching the first substrate 1a1 first, and then the thin film transistor structure layer is prepared. This will form the groove 11a with higher precision. Alternatively, the groove 11a can be formed by grinding the first substrate 1a1 after the liquid crystal panel is assembled.

[0054] Optionally, the thin film transistor structure layer 1a2 includes a thin film transistor and a pixel electrode layer, and the pixel electrode layer is arranged on the thin film transistor and connected to the thin film transistor.

[0055] In some embodiments, the thin film transistor structure layer 1a2 includes a light shielding layer 1a3 disposed on the first substrate 1a1, and the thin film transistor is disposed on the light shielding layer 1a3. The light shielding layer 1a3 shields the thin film transistor to prevent light from irradiating the thin film transistor.

[0056] Furthermore, the light shielding layer 1a3 is not only provided in the display area AA, but also at the interface between the non-display area NA and the display area AA, near the non-display area NA. In the orthographic projection direction of the tiled display panel 100, the light shielding layer 1a3 is located at the periphery of the compensation display panel 12 and between the boundary of the compensation display panel 12 and the display area AA of the liquid crystal panel 11. This arrangement further reduces the risk of light leakage, reduces light crosstalk between the liquid crystal panel 11 and the compensation display panel 12, and also saves manufacturing process.

[0057] Optionally, the compensation display panel 12 is positioned within the positioning groove 10a via optical adhesive 13. The refractive index of the optical adhesive 13 is greater than that of the first substrate 1a1. The positioning groove 10a includes a first surface 101 and second surfaces 102 connected to both sides of the first surface 101. The first surface 101 is disposed opposite the display surface of the compensation display panel 12. The optical adhesive 13 and the first surface 101 are bonded to form a total reflection interface fs. The total reflection interface fs is located at least on both sides of the first surface 101.

[0058] Since the refractive index of the optical adhesive 13 is greater than that of the first substrate 1a1, the first surface 101 can serve as a total reflection interface fs. When the light of the backlight module is radiated to the first surface 101 through the optical adhesive 13, reflection occurs, thereby reducing the risk of light leakage.

[0059] In addition, the viewing angle of the compensation display panel 12 is greater than that of the liquid crystal panel 11. The total reflection interface fs disposed on both sides of the first surface 101 can also reflect the large-angle light of the compensation display panel 12, reducing the effect of the light of the compensation display panel 12 interfering with the liquid crystal panel 11.

[0060] Optionally, the liquid crystal panel 11 further includes a transparent sealant 114, which is disposed around the periphery of the liquid crystal layer 112 and between the first substrate 111 and the second substrate 113. The sealant 114 is located in the non-display area NA of the liquid crystal panel 11 and overlaps the groove 11a.

[0061] In this embodiment, the sealant 114 and the groove 11a overlap, which, on the one hand, thins the portion of the first substrate 1a1 corresponding to the sealant 114, improves light transmittance, and further improves the curing effect of the sealant; on the other hand, a narrow frame can be achieved.

[0062] Optionally, the second substrate 113 includes a second underlay 1b1 and a black matrix layer 1b2 disposed on a side of the second substrate 1b1 near the liquid crystal layer 112. The black matrix layer 1b2 covers the display area AA and non-display area NA of the liquid crystal panel 11. The compensation display panel 12 includes a base 121 and a pixel device 122 disposed on a side of the base 121 near the second substrate 113.

[0063] In the orthographic projection direction of the spliced ​​display panel 100 , the black matrix layer 1 b 2 is disposed between the pixel devices 122 .

[0064] Using a black matrix layer 1b2 to cover both the display area AA and the non-display area NA prevents crosstalk between the pixels of the liquid crystal panel 11 and the compensation display panel 12, ensuring a consistent contrast ratio between the two, while also saving process steps. Furthermore, disposing the black matrix layer 1b2 in the non-display area NA further reduces the risk of light leakage.

[0065] Optionally, the compensation display panel 12 further includes an encapsulation layer, which covers the second substrate 1 b 1 and the pixel device 122 . The encapsulation layer is connected to the optical adhesive 13 .

[0066] Optionally, the pixel device 122 includes but is not limited to one of Mini-LED, Micro-LED and OLED devices.

[0067] Optionally, the second substrate 113 further includes a color filter layer 1b3 disposed on a side of the second underlay 1b1 close to the liquid crystal layer 112. The color filter layer 1a3 is disposed between the black matrix layers 1b2.

[0068] Optionally, the gap pf is filled with a packaging glue 14 , which is connected to the frame glue 114 . The refractive index of the packaging glue 14 is the same as the refractive index of the frame glue 114 .

[0069] The encapsulation glue 14 improves the encapsulation effect of the spliced ​​display panel 100 and also improves the stability of the connection between the liquid crystal panels 11. The refractive index of the encapsulation glue 14 and the frame glue 114 is consistent, so that the optical path trend of the light emitted by the compensation display panel 12 tends to be consistent, thereby improving the display effect.

[0070] Optionally, the spliced ​​display panel 100 further includes a first polarizer 151 and a second polarizer 152. The first polarizer 151 is disposed on a side of the first substrate 111 away from the liquid crystal layer 112. The first polarizer 151 has an opening 15a. The opening 15a overlaps with and is in communication with the groove 11a. The compensation display panel 12 is disposed within the opening 15a.

[0071] The boundary of the opening 15a is located outside the groove 11a or coincides with the boundary of the groove 11a, so that the compensation display panel 12 is disposed within the opening 15a and the groove 11a, thereby improving the flatness.

[0072] The second polarizer 152 is disposed on a side of the second substrate 113 away from the liquid crystal layer 112 . The second polarizer 152 covers the display area AA and the non-display area NA of the liquid crystal panel 11 . The second polarizer 152 is overlapped with the compensation display panel 12 .

[0073] It is understandable that the luminance of the compensation display panel 12 is higher than that of the liquid crystal panel 11. Therefore, by using the second polarizer 152 to cover the display area of ​​the compensation display panel 12, the difference in luminance between the compensation display panel 12 and the liquid crystal panel 11 can be reduced, thereby improving the overall display effect of the spliced ​​display panel 100.

[0074] Example 2

[0075] 3 and 4 , a second embodiment provides a spliced ​​display panel 100 comprising at least two liquid crystal panels 11 and at least one compensation display panel 12. The liquid crystal panel 11 comprises a display area AA and a non-display area NA, wherein the non-display area NA is located on at least one side of the display area AA.

[0076] Two adjacent liquid crystal panels 11 are spliced ​​together. There is a seam pf between the two adjacent liquid crystal panels 11. The compensation display panel 12 is arranged on the light incident side of the two adjacent liquid crystal panels 11 and blocks the seam pf. The liquid crystal panel 11 includes a first substrate 111, a liquid crystal layer 112, and a second substrate 113 stacked in sequence, and the first substrate 111 is the light incident side of the liquid crystal panel 11. A groove 11a is provided on the side of the first substrate 111 away from the liquid crystal layer 112. The groove 11a is provided in the non-display area NA of the liquid crystal panel 11. In the two adjacent liquid crystal panels 11, the groove 11a of one liquid crystal panel 11 and the groove 11a of the other liquid crystal panel 11 are arranged opposite to each other and spliced ​​and connected to form a positioning groove 10a. The compensation display panel 12 is provided in the positioning groove 10a.

[0077] It should be noted that, in order for the liquid crystal panel 11 to realize the display function, a backlight module needs to be provided on the light incident side of the liquid crystal panel 11. The backlight module provides a surface light source for the liquid crystal panel 11.

[0078] In related technologies, when an LED display panel is attached to the joint of two adjacent liquid crystal panels, the boundary of the LED display panel is a certain distance from the display area of ​​the liquid crystal panels. If this distance is too large due to an attachment error that causes the LED display panel to shift, light from the backlight module will pass through the area between the LED display panel and the liquid crystal panel display area, causing light leakage. This distance is limited by the attachment accuracy of the LED display panel.

[0079] The splicing display panel 100 of the embodiment of the present application is provided with a positioning groove 10a at the splicing area of ​​the liquid crystal panel 11, and the compensation display panel 12 is provided in the positioning groove 10a. Due to the provision of the positioning groove 10a, the attachment of the compensation display panel 12 is more precise, thereby reducing the risk of excessive distance between the compensation display panel 12 and the display area AA of the liquid crystal panel 11, thereby reducing the risk of light leakage from the backlight module.

[0080] Furthermore, because the backlight module is positioned on the side of the first polarizer 151 away from the liquid crystal layer 112, some of the high-angle light emitted by the backlight module is blocked by the compensation display panel 12. Compared to when the compensation display panel 12 is positioned directly on the flat array substrate, when the compensation display panel 12 is positioned within the positioning groove 10a, the compensation display panel 12 blocks more high-angle light emitted by the backlight, further reducing the risk of backlight leakage. For example, when the compensation display panel 12 is positioned on the flat array substrate, the compensation display panel 12 can block light with an exit angle of more than 160 degrees. However, when the compensation display panel 12 is positioned within the positioning groove 10a, because the compensation display panel 12 is moved a certain distance toward the light exit direction, the compensation display panel 12 can block light with an exit angle of more than 150 degrees. Consequently, the compensation display panel 12 can block even more high-angle light, further reducing the risk of backlight leakage.

[0081] The compensation display panel 12 is mounted in the positioning groove 10a via optical adhesive 13. The positioning groove 10a includes a first surface 101 and second surfaces 102 connected to both sides of the first surface 101. The first surface 101 is disposed opposite to the display surface of the compensation display panel 12.

[0082] The difference between the second embodiment and the above embodiments is that the refractive index of the optical adhesive 13 is smaller than the refractive index of the first substrate 1a1. The optical adhesive 13 is bonded to the second surface 102 to form a total reflection interface fs.

[0083] Since the refractive index of the optical adhesive 13 is smaller than that of the first substrate 1a1, the second surface 102 can serve as a total reflection interface fs. When the light from the backlight module is radiated to the second surface 102 through the first substrate 1a1, reflection occurs, thereby reducing the risk of light leakage and the risk of light interference with the compensation display panel 12.

[0084] In addition, the reflected light radiates to the liquid crystal layer 112, improving the utilization rate of the backlight. When the backlight module is an edge-type backlight, the reflected light can increase the brightness of the side of the liquid crystal panel 11 away from the light source, making the backlight output more uniform.

[0085] Example 3:

[0086] 5 and 6 , a third embodiment provides a spliced ​​display panel 100 comprising at least two liquid crystal panels 11 and at least one compensation display panel 12. The liquid crystal panel 11 comprises a display area AA and a non-display area NA, wherein the non-display area NA is located on at least one side of the display area AA.

[0087] Two adjacent liquid crystal panels 11 are spliced ​​together. There is a seam pf between the two adjacent liquid crystal panels 11. The compensation display panel 12 is arranged on the light incident side of the two adjacent liquid crystal panels 11 and blocks the seam pf. The liquid crystal panel 11 includes a first substrate 111, a liquid crystal layer 112, and a second substrate 113 stacked in sequence, and the first substrate 111 is the light incident side of the liquid crystal panel 11. A groove 11a is provided on the side of the first substrate 111 away from the liquid crystal layer 112. The groove 11a is provided in the non-display area NA of the liquid crystal panel 11. In the two adjacent liquid crystal panels 11, the groove 11a of one liquid crystal panel 11 and the groove 11a of the other liquid crystal panel 11 are arranged opposite to each other and spliced ​​and connected to form a positioning groove 10a. The compensation display panel 12 is provided in the positioning groove 10a.

[0088] It should be noted that, in order for the liquid crystal panel 11 to realize the display function, a backlight module needs to be provided on the light incident side of the liquid crystal panel 11. The backlight module provides a surface light source for the liquid crystal panel 11.

[0089] In related technologies, when an LED display panel is attached to the joint of two adjacent liquid crystal panels, the boundary of the LED display panel is a certain distance from the display area of ​​the liquid crystal panels. If this distance is too large due to an attachment error that causes the LED display panel to shift, light from the backlight module will pass through the area between the LED display panel and the liquid crystal panel display area, causing light leakage. This distance is limited by the attachment accuracy of the LED display panel.

[0090] The splicing display panel 100 of the embodiment of the present application is provided with a positioning groove 10a at the splicing area of ​​the liquid crystal panel 11, and the compensation display panel 12 is provided in the positioning groove 10a. Due to the provision of the positioning groove 10a, the attachment of the compensation display panel 12 is more precise, thereby reducing the risk of excessive distance between the compensation display panel 12 and the display area AA of the liquid crystal panel 11, thereby reducing the risk of light leakage from the backlight module.

[0091] Furthermore, because the backlight module is positioned on the side of the first polarizer 151 away from the liquid crystal layer 112, some of the high-angle light emitted by the backlight module is blocked by the compensation display panel 12. Compared to when the compensation display panel 12 is positioned directly on the flat array substrate, when the compensation display panel 12 is positioned within the positioning groove 10a, the compensation display panel 12 blocks more high-angle light emitted by the backlight, further reducing the risk of backlight leakage. For example, when the compensation display panel 12 is positioned on the flat array substrate, the compensation display panel 12 can block light with an exit angle of more than 160 degrees. However, when the compensation display panel 12 is positioned within the positioning groove 10a, because the compensation display panel 12 is moved a certain distance toward the light exit direction, the compensation display panel 12 can block light with an exit angle of more than 150 degrees. Consequently, the compensation display panel 12 can block even more high-angle light, further reducing the risk of backlight leakage.

[0092] The compensation display panel 12 is mounted in the positioning groove 10a via optical adhesive 13. The positioning groove 10a includes a first surface 101 and second surfaces 102 connected to both sides of the first surface 101. The first surface 101 is disposed opposite to the display surface of the compensation display panel 12.

[0093] The difference between the third embodiment and the above embodiment is that a light blocking layer 16 is provided on the second surface 102 .

[0094] There is no restriction on the relationship between the refractive indexes of the optical adhesive 13 and the first substrate 1a1 in the third embodiment, that is, the refractive indexes of the two can be the same or different.

[0095] The spliced ​​display panel 100 of the third embodiment is provided with a light blocking layer 16 on the second surface 102 to block the light radiated from the backlight module to the groove 11a, thereby reducing the risk of light leakage, reducing the risk of the backlight light interfering with the compensation display panel 12 and reducing the risk of the compensation display panel 12 interfering with the liquid crystal panel 11.

[0096] The above is a detailed introduction to a spliced ​​display panel provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, based on the idea of ​​the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A spliced ​​display panel, comprising: At least two liquid crystal panels, two adjacent liquid crystal panels are spliced ​​together, and a seam is formed between the two adjacent liquid crystal panels; as well as A compensation display panel, which is arranged on the light incident side of two adjacent liquid crystal panels and blocks the joint; The liquid crystal panel comprises a first substrate, a liquid crystal layer and a second substrate which are stacked in sequence, the first substrate being a light incident side of the liquid crystal panel, a side of the first substrate away from the liquid crystal layer being provided with a groove, and the groove being provided in a non-display area of ​​the liquid crystal panel; In two adjacent liquid crystal panels, the groove of one liquid crystal panel and the groove of the other liquid crystal panel are arranged opposite to each other and connected to form a positioning groove, and the compensation display panel is arranged in the positioning groove.

2. The spliced ​​display panel according to claim 1, wherein: The depth of the groove is between 0.2 mm and 0.4 mm.

3. The spliced ​​display panel according to claim 1, wherein: The distance from the edge of the display area of ​​the liquid crystal panel to the side wall of the adjacent positioning groove is less than or equal to 50 microns, and the distance from the edge of the display area of ​​the liquid crystal panel to the side wall of the compensation display panel is less than or equal to 100 microns.

4. The spliced ​​display panel according to claim 1, wherein: The first substrate includes a first substrate and a thin film transistor structure layer arranged on a side of the first substrate close to the liquid crystal layer, and the groove is arranged on a side of the first substrate away from the liquid crystal layer.

5. The spliced ​​display panel according to claim 4, wherein: The thin film transistor structure layer includes a light shielding layer arranged on the first substrate, and the thin film transistor is arranged on the light shielding layer; The shading layer is arranged in the display area of ​​the liquid crystal panel, and is also arranged on a side of the junction between the non-display area and the display area close to the non-display area. In the orthographic projection direction of the spliced ​​display panel, the shading layer is located at the periphery of the compensation display panel and between the boundary of the compensation display panel and the display area of ​​the liquid crystal panel.

6. The spliced ​​display panel according to claim 4, wherein: The compensation display panel is arranged in the positioning groove by optical glue, the refractive index of the optical glue is greater than the refractive index of the first substrate, the positioning groove includes a first surface and a second surface connected to both sides of the first surface, the first surface is arranged opposite to the display surface of the compensation display panel, the optical glue and the first surface are bonded to form a total reflection interface, and the total reflection interface is at least located at both side areas of the first surface.

7. The spliced ​​display panel according to claim 4, wherein: The compensation display panel is arranged in the positioning groove by optical glue, the refractive index of the optical glue is smaller than the refractive index of the first substrate, the positioning groove includes a first surface and a second surface connected to both sides of the first surface, the first surface is arranged opposite to the display surface of the compensation display panel, and the optical glue is bonded to the second surface to form a total reflection interface.

8. The spliced ​​display panel according to claim 4, wherein: The compensation display panel is arranged in the positioning groove by optical glue, and the positioning groove includes a first surface and a second surface connected to both sides of the first surface, the first surface is arranged opposite to the display surface of the compensation display panel, and a light blocking layer is arranged on the second surface.

9. The spliced ​​display panel according to claim 6, wherein: The liquid crystal panel further includes a transparent frame glue, which is arranged around the periphery of the liquid crystal layer and between the first substrate and the second substrate. The frame glue is located in a non-display area of ​​the liquid crystal panel and overlaps with the groove.

10. The spliced ​​display panel according to claim 7, wherein: The liquid crystal panel further includes a transparent frame glue, which is arranged around the periphery of the liquid crystal layer and between the first substrate and the second substrate. The frame glue is located in a non-display area of ​​the liquid crystal panel and overlaps with the groove.

11. The spliced ​​display panel according to claim 8, wherein: The liquid crystal panel further includes a transparent frame glue, which is arranged around the periphery of the liquid crystal layer and between the first substrate and the second substrate. The frame glue is located in a non-display area of ​​the liquid crystal panel and overlaps with the groove.

12. The spliced ​​display panel according to claim 9, wherein: The second substrate comprises a second substrate and a black matrix layer arranged on a side of the second substrate close to the liquid crystal layer, the black matrix layer covers a display area and a non-display area of ​​the liquid crystal panel, and the compensation display panel comprises a base and a pixel device arranged on a side of the base close to the second substrate; In the orthographic projection direction of the spliced ​​display panel, the black matrix layer is arranged between the pixel devices.

13. The spliced ​​display panel according to claim 9, wherein: The joint is filled with packaging glue, the packaging glue is connected to the frame glue, and the refractive index of the packaging glue is the same as the refractive index of the frame glue.

14. The spliced ​​display panel according to claim 9, wherein: The spliced ​​display panel further includes a first polarizer and a second polarizer, the first polarizer is arranged on a side of the first substrate away from the liquid crystal layer, the first polarizer is provided with an opening, the opening overlaps with and is connected to the groove, and the compensation display panel is arranged in the opening; The second polarizer is disposed on a side of the second substrate away from the liquid crystal layer, the second polarizer covers a display area and a non-display area of ​​the liquid crystal panel, and the second polarizer is overlapped with the compensation display panel.

15. The spliced ​​display panel according to claim 12, wherein: The second substrate further includes a color filter layer disposed on a side of the second substrate close to the liquid crystal layer, and the color filter layer is disposed between the black matrix layers.

16. The spliced ​​display panel according to claim 12, wherein: The pixel device includes one of a Mini-LED, a Micro-LED and an OLED device.

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