Splicing display panel

Abstract

This application discloses a splicing display panel with a seam between two adjacent liquid crystal panels. A compensation display panel is disposed on the light-incident side of the two adjacent liquid crystal panels and blocks the seam. The liquid crystal panel includes a first substrate, a liquid crystal layer, and a second substrate stacked sequentially. A groove is provided on the side of the first substrate away from the liquid crystal layer, and the groove is located in the non-display area of ​​the liquid crystal panel. In two adjacent liquid crystal panels, the grooves of one liquid crystal panel and the groove of the other liquid crystal panel are arranged opposite to each other and spliced ​​together to form a positioning groove, and the compensation display panel is disposed in the positioning groove. This application embodiment provides a positioning groove at the splicing area of ​​the liquid crystal panels, which improves the attachment accuracy of the compensation display panel, reduces the risk of excessive distance between the compensation display panel and the display area of ​​the liquid crystal panel, and thus reduces the risk of light leakage.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a splicing display panel. Background Technology

[0002] In technologies related to MLED (Mini-LED / Micro-LED) light panels for splicing 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 spliced ​​on either the light-emitting or light-receiving side of the LCD panel. Considering flatness requirements, the MLED light panel is generally placed on the light-receiving side of two adjacent LCD panels to eliminate the seam.

[0003] However, due to the mounting tolerance of the MLED light board, there is a large light leakage area between the MLED light board and the display area of ​​the LCD panel. This allows some of the light emitted by the backlight module located on the light-incident side of the LCD panel to escape through the light leakage area, which is especially noticeable when viewed from the side. Summary of the Invention

[0004] This application provides a splicing display panel that can reduce the risk of light leakage in the splicing area.

[0005] This application provides a splicing display panel, which includes:

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

[0007] A compensation display panel is disposed on the light-incident side of two adjacent liquid crystal panels and blocks the seam between them;

[0008] The liquid crystal panel includes a first substrate, a liquid crystal layer, and a second substrate stacked sequentially. The first substrate is the light-incident side of the liquid crystal panel. A groove is provided on the side of the first substrate away from the liquid crystal layer. The groove is located in the 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 disposed in the positioning groove.

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

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

[0012] Optionally, in some embodiments of this application, the first substrate includes a first substrate and a thin-film transistor structure layer disposed on the side of the first substrate near the liquid crystal layer, and the groove is disposed on the side of the first substrate away from the liquid crystal layer.

[0013] Optionally, in some embodiments of this application, the compensation display panel is disposed in the positioning groove by means of optical adhesive, the refractive index of the optical adhesive 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 disposed opposite to the display surface of the compensation display panel, the optical adhesive is bonded to the first surface to form a total reflection interface, and the total reflection interface is located at least in the regions on both sides of the first surface.

[0014] Optionally, in some embodiments of this application, the compensation display panel is disposed in the positioning groove by means of optical adhesive, the refractive index of the optical adhesive is less 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 disposed opposite to the display surface of the compensation display panel, and the optical adhesive is bonded to the second surface to form a total internal reflection interface.

[0015] Optionally, in some embodiments of this application, the compensation display panel is disposed in the positioning groove by optical adhesive. The positioning groove includes a first surface and a second surface connected to both sides of the first surface. The first surface is disposed opposite to the display surface of the compensation display panel, and a light-blocking layer is disposed on the second surface.

[0016] Optionally, in some embodiments of this application, the liquid crystal panel further includes a transparent frame adhesive, which surrounds the outer periphery of the liquid crystal layer and is disposed between the first substrate and the second substrate. The frame adhesive is located in the non-display area of ​​the liquid crystal panel and overlaps with the groove.

[0017] Optionally, in some embodiments of this application, the second substrate includes a second substrate and a black matrix layer disposed on the side of the second substrate near the liquid crystal layer, the black matrix layer covering the display area and non-display area of ​​the liquid crystal panel, and the compensation display panel includes a substrate and pixel devices disposed on the side of the substrate near the second substrate;

[0018] In the forward projection direction of the splicing display panel, the black matrix layer is disposed between the pixel devices.

[0019] Optionally, in some embodiments of this application, the seam is filled with encapsulating adhesive, which is connected to the frame adhesive, and the refractive index of the encapsulating adhesive is the same as that of the frame adhesive.

[0020] Optionally, in some embodiments of this application, the splicing display panel further includes a first polarizer and a second polarizer. The first polarizer is disposed on the side of the first substrate away from the liquid crystal layer. An opening is provided on the first polarizer. The opening overlaps with and communicates with the groove. The compensation display panel is disposed in the opening.

[0021] The second polarizer is disposed on the side of the second substrate away from the liquid crystal layer. The second polarizer covers the display area and non-display area of ​​the liquid crystal panel. The second polarizer overlaps with the compensation display panel.

[0022] The splicing display panel of this application embodiment includes at least two liquid crystal panels and at least one compensation display panel. Two adjacent liquid crystal panels are spliced ​​together, and there is a seam between the two adjacent liquid crystal panels. The compensation display panel is disposed on the light-incident side of the two adjacent liquid crystal panels and blocks the 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. A groove is provided on the side of the first substrate away from the liquid crystal layer. The groove is disposed in the 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 spliced ​​together to form a positioning groove. The compensation display panel is disposed in the positioning groove.

[0023] In this embodiment, the splicing display panel has a positioning groove at the splicing area of ​​the liquid crystal panel. The compensation display panel is placed in the positioning groove, which avoids the risk of excessive offset of the compensation display panel due to attachment error, resulting in an excessive distance between the display areas of the compensation display panel and the liquid crystal panel. This improves the attachment accuracy of the compensation display panel and reduces the risk of excessive distance between the display areas of the compensation display panel and the liquid crystal panel, thereby reducing the risk of backlight leakage. In addition, the compensation display panel is placed in the positioning groove, which also blocks some of the large-angle light emitted from the backlight, further reducing the risk of light leakage. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the splicing display panel provided in Embodiment 1 of this application;

[0025] Figure 2 yes Figure 1 Enlarged view of section M;

[0026] Figure 3 This is a schematic diagram of the structure of the splicing display panel provided in Embodiment 2 of this application;

[0027] Figure 4 yes Figure 3 Enlarged view of section N;

[0028] Figure 5 This is a schematic diagram of the structure of the splicing display panel provided in Embodiment 3 of this application;

[0029] Figure 6 yes Figure 5 A magnified view of section K in the middle. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device; the terms "first," "second," "third," etc., are used only as indications and do not impose numerical requirements or establish a sequence.

[0031] This application provides a splicing display panel, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0032] Example 1

[0033] Please refer to Figure 1 and Figure 2 This application provides a splicing 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, with the non-display area NA located on at least one side of the display area AA.

[0034] Two adjacent liquid crystal panels 11 are spliced ​​together. A seam PF exists between the two adjacent liquid crystal panels 11. A compensation display panel 12 is disposed on the light-incident side of the two adjacent liquid crystal panels 11 and blocks the seam PF. Each liquid crystal panel 11 includes a first substrate 111, a liquid crystal layer 112, and a second substrate 113 stacked sequentially. 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 located in the non-display area NA of the liquid crystal panel 11. In 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 opposite each other and spliced ​​together to form a positioning groove 10a. The compensation display panel 12 is disposed within the positioning groove 10a.

[0035] It should be noted that, in order for the LCD panel 11 to realize its display function, a backlight module needs to be provided on the light-incident side of the LCD panel 11. The backlight module provides a surface light source for the LCD panel 11.

[0036] The compensation display panel 12 is located in the non-display area NA of the liquid crystal panel 11. The portion of the liquid crystal panel 11 that is the non-display area NA can be viewed through the display screen of the compensation display panel 12.

[0037] In related technologies, when an LED (light-emitting diode) display panel is attached to the splicing point of two adjacent LCD panels, the boundary of the LED display panel is a certain distance from the display area of ​​the LCD panel. If the LED display panel shifts due to attachment errors, making this distance too large, the light emitted by the backlight module will pass through the area between the LED display panel and the display area of ​​the LCD panel, resulting in light leakage. This distance is limited by the attachment accuracy of the LED display panel, with an attachment error of ±0.15 mm.

[0038] In this embodiment of the application, the splicing display panel 100 has a positioning groove 10a at the splicing area of ​​the liquid crystal panel 11, and the compensation display panel 12 is disposed in the positioning groove 10a. The positioning groove 10a makes the attachment of the compensation display panel 12 more accurate, 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 backlight module light leakage.

[0039] Furthermore, since the backlight module is located on the side of the first polarizer 151 away from the liquid crystal layer 112, some of the large-angle light emitted by the backlight module will be blocked by the compensation display panel 12. Compared to the compensation display panel 12 being directly located on the flat array substrate side, the compensation display panel 12 is located in the positioning groove 10a. The compensation display panel 12 blocks more large-angle light emitted from the backlight, further reducing the risk of backlight leakage. For example, if the compensation display panel 12 is located on the flat array substrate side, it can block light with an emission angle of 160 degrees or more. However, when the compensation display panel 12 is located in the positioning groove 10a, because it is moved a certain distance in the direction of light emission, it can block light with an emission angle of 150 degrees or more. Thus, the compensation display panel 12 can block more large-angle light, thereby further reducing the risk of backlight leakage.

[0040] Optionally, 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.

[0041] It is important to understand that if the groove 11a is too deep, the support performance of the first substrate 1a1 will be reduced; if the groove 11a is too shallow, the compensation display panel 12 will not be able to fit within the groove 11a, thus failing to achieve a precise fit. Therefore, the aforementioned depth of the groove 11a ensures the support of the first substrate 1a1 while allowing the compensation display panel 12 to be precisely attached within the groove 11a.

[0042] Optionally, a groove 11a is formed on the first substrate 1a1 using a photolithography process.

[0043] Optionally, the distance from the edge of the display area AA of the liquid crystal panel 11 to the sidewall of the adjacent positioning groove 11a is less than or equal to 50 micrometers, such as 0 micrometers, 5 micrometers, 10 micrometers, 15 micrometers, 20 micrometers, 25 micrometers, 30 micrometers, 35 micrometers, 40 micrometers, 45 micrometers or 50 micrometers.

[0044] The distance from the edge of the display area AA of the liquid crystal panel 11 to the sidewall of the compensation display panel 12 is less than or equal to 100 micrometers, for example, it can be 0 micrometers, 5 micrometers, 10 micrometers, 15 micrometers, 20 micrometers, 25 micrometers, 30 micrometers, 35 micrometers, 40 micrometers, 45 micrometers, 50 micrometers, 55 micrometers, 60 micrometers, 65 micrometers, 70 micrometers, 75 micrometers, 80 micrometers, 85 micrometers, 90 micrometers, 95 micrometers or 100 micrometers.

[0045] Optionally, the material of the first substrate 1a1 includes, but is not limited to, glass, sapphire, and silicon.

[0046] Optionally, the liquid crystal panel 11 can be a conventional panel, a COA (column on array) panel, or a BOA (black matrix on array) panel. This embodiment uses a conventional panel as an example for illustration, that is, the first substrate 111 is an array substrate, and the second substrate is a color filter substrate.

[0047] Optionally, the compensation display panel 12 can be a Mini-LED panel, Micro-LED panel, OLED panel, or QLED panel, etc.

[0048] Optionally, in one embodiment, the first substrate 111 includes a first substrate 1a1 and a thin-film transistor structure layer 1a2 disposed on the side of the first substrate 1a1 near the liquid crystal layer 112. A groove 11a is disposed on the side of the first substrate 1a1 away from the liquid crystal layer 112.

[0049] Optionally, the groove 11a can be formed first by etching the first substrate 1a1, followed by the fabrication of the thin-film transistor structure layer, resulting in a 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.

[0050] Optionally, the thin-film transistor structure layer 1a2 includes a thin-film transistor and a pixel electrode layer, wherein the pixel electrode layer is disposed on the thin-film transistor and connected to the thin-film transistor.

[0051] 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 blocks the thin-film transistor, preventing light from shining on it.

[0052] Furthermore, the light-shielding layer 1a3 is not only disposed in the display area AA, but also on the side near the non-display area NA at the boundary between the non-display area NA and the display area AA. In the orthographic projection direction of the splicing display panel 100, the light-shielding layer 1a3 is located on the outer 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 can further reduce the risk of light leakage, reduce light crosstalk between the liquid crystal panel 11 and the compensation display panel 12, and also save on manufacturing processes.

[0053] Optionally, the compensation display panel 12 is disposed within the positioning groove 10a using 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 a second surface 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. The optical adhesive 13 is bonded to the first surface 101 to form a total internal reflection interface fs. The total internal reflection interface fs is located at least in the regions on both sides of the first surface 101.

[0054] 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 internal reflection interface fs. When the light from the backlight module is radiated to the first surface 101 through the optical adhesive 13, it will be reflected, thereby reducing the risk of light leakage.

[0055] In addition, the viewing angle of the compensation display panel 12 is greater than that of the liquid crystal panel 11. The total internal reflection interface fs sets the two side areas of the first surface 101 to reflect the large-angle light from the compensation display panel 12, thereby reducing the light interference of the compensation display panel 12 with the liquid crystal panel 11.

[0056] Optionally, the liquid crystal panel 11 further includes a transparent sealant 114, which surrounds the outer periphery of the liquid crystal layer 112 and is disposed 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. The sealant 114 overlaps with the groove 11a.

[0057] In this embodiment, the frame adhesive 114 and the groove 11a are overlapped. On the one hand, the portion of the first substrate 1a1 corresponding to the frame adhesive 114 is thinned, thereby improving the light transmittance and thus improving the curing effect of the frame adhesive; on the other hand, a narrow bezel can be achieved.

[0058] Optionally, the second substrate 113 includes a second substrate 1b1 and a black matrix layer 1b2 disposed on the side of the second substrate 1b1 near the liquid crystal layer 112. The black matrix layer 1b2 covers the display area AA and the non-display area NA of the liquid crystal panel 11. The compensation display panel 12 includes a substrate 121 and pixel devices 122 disposed on the side of the substrate 121 near the second substrate 113.

[0059] In the forward projection direction of the splicing display panel 100, the black matrix layer 1b2 is disposed between the pixel devices 122.

[0060] By using a black matrix layer 1b2 to cover the display area AA and the non-display area NA, pixel light emission crosstalk between the liquid crystal panel 11 and the compensation display panel 12 can be avoided in one step, and the contrast of the liquid crystal panel 11 and the compensation display panel 12 is made more consistent, while also saving process steps. In addition, placing the black matrix layer 1b2 in the non-display area NA can further reduce the risk of light leakage.

[0061] Optionally, the compensation display panel 12 also includes an encapsulation layer that encapsulates and covers the second substrate 1b1 and the pixel device 122. The encapsulation layer is connected to optical adhesive 13.

[0062] Optionally, the pixel device 122 includes, but is not limited to, one of Mini-LED, Micro-LED and OLED devices.

[0063] Optionally, the second substrate 113 further includes a color filter layer 1b3 disposed on the side of the second substrate 1b1 near the liquid crystal layer 112. The color filter layer 1b3 is disposed between the black matrix layers 1b2.

[0064] Optionally, the seam PF is filled with encapsulating adhesive 14, which is attached to the frame adhesive 114. The refractive index of the encapsulating adhesive 14 is the same as that of the frame adhesive 114.

[0065] The encapsulating adhesive 14 improves the encapsulation effect of the splicing display panel 100 and enhances the stability of the connection between the liquid crystal panels 11. Furthermore, the encapsulating adhesive 14 and the frame adhesive 114 have the same refractive index, which makes the light path of the light emitted by the compensation display panel 12 more consistent, thus improving the display effect.

[0066] Optionally, the splicing display panel 100 further includes a first polarizer 151 and a second polarizer 152. The first polarizer 151 is disposed on the side of the first substrate 111 away from the liquid crystal layer 112. An opening 15a is provided on the first polarizer 151. The opening 15a overlaps with and communicates with the groove 11a. The compensation display panel 12 is disposed within the opening 15a.

[0067] 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 in the opening 15a and the groove 11a, thereby improving the flatness.

[0068] The second polarizer 152 is disposed on the 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 disposed overlapping the compensation display panel 12.

[0069] It is understandable that the luminous brightness of the compensation display panel 12 is higher than that of the liquid crystal panel 11. Therefore, by using a second polarizer 152 to cover the display area of ​​the compensation display panel 12, the difference in luminous brightness between the compensation display panel 12 and the liquid crystal panel 11 can be reduced, thereby improving the overall display effect of the splicing display panel 100.

[0070] Example 2

[0071] Please refer to Figure 3 and Figure 4 In Embodiment 2, a splicing display panel 100 is provided, 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, with the non-display area NA located on at least one side of the display area AA.

[0072] Two adjacent liquid crystal panels 11 are spliced ​​together. A seam PF exists between the two adjacent liquid crystal panels 11. A compensation display panel 12 is disposed on the light-incident side of the two adjacent liquid crystal panels 11 and blocks the seam PF. Each liquid crystal panel 11 includes a first substrate 111, a liquid crystal layer 112, and a second substrate 113 stacked sequentially. 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 located in the non-display area NA of the liquid crystal panel 11. In 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 opposite each other and spliced ​​together to form a positioning groove 10a. The compensation display panel 12 is disposed within the positioning groove 10a.

[0073] It should be noted that, in order for the LCD panel 11 to realize its display function, a backlight module needs to be provided on the light-incident side of the LCD panel 11. The backlight module provides a surface light source for the LCD panel 11.

[0074] In related technologies, when an LED display panel is attached to the splicing point of two adjacent LCD panels, the boundary of the LED display panel is a certain distance from the display area of ​​the LCD panel. If the LED display panel shifts due to attachment errors, making this distance too large, the light emitted by the backlight module will pass through the area between the LED display panel and the display area of ​​the LCD panel, resulting in light leakage. This distance is limited by the attachment accuracy of the LED display panel.

[0075] In this embodiment of the application, the splicing display panel 100 has a positioning groove 10a at the splicing area of ​​the liquid crystal panel 11, and the compensation display panel 12 is disposed in the positioning groove 10a. The positioning groove 10a makes the attachment of the compensation display panel 12 more accurate, 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 backlight module light leakage.

[0076] Furthermore, since the backlight module is located on the side of the first polarizer 151 away from the liquid crystal layer 112, some of the large-angle light emitted by the backlight module will be blocked by the compensation display panel 12. Compared to the compensation display panel 12 being directly located on the flat array substrate side, the compensation display panel 12 is located in the positioning groove 10a. The compensation display panel 12 blocks more large-angle light emitted from the backlight, further reducing the risk of backlight leakage. For example, if the compensation display panel 12 is located on the flat array substrate side, it can block light with an emission angle of 160 degrees or more. However, when the compensation display panel 12 is located in the positioning groove 10a, because it is moved a certain distance in the direction of light emission, it can block light with an emission angle of 150 degrees or more. Thus, the compensation display panel 12 can block more large-angle light, thereby further reducing the risk of backlight leakage.

[0077] The compensation display panel 12 is disposed in the positioning groove 10a by optical adhesive 13. The positioning groove 10a includes a first surface 101 and a second surface 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.

[0078] The difference between Example 2 and the above examples is that the refractive index of the optical adhesive 13 is less than that of the first substrate 1a1. The optical adhesive 13 is bonded to the second surface 102 to form a total internal reflection interface fs.

[0079] Since the refractive index of the optical adhesive 13 is less than that of the first substrate 1a1, the second surface 102 can serve as a total internal reflection interface fs. When the light from the backlight module radiates from the first substrate 1a1 to the second surface 102, reflection will occur, thereby reducing the risk of light leakage and reducing the risk of light interference compensation display panel 12.

[0080] In addition, the reflected light radiates to the liquid crystal layer 112, improving the utilization rate of the backlight. Furthermore, when the backlight module is an edge-lit 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 emission more uniform.

[0081] Example 3

[0082] Please refer to Figure 5 and Figure 6 In Embodiment 3, a splicing display panel 100 is provided, 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, with the non-display area NA located on at least one side of the display area AA.

[0083] Two adjacent liquid crystal panels 11 are spliced ​​together. A seam PF exists between the two adjacent liquid crystal panels 11. A compensation display panel 12 is disposed on the light-incident side of the two adjacent liquid crystal panels 11 and blocks the seam PF. Each liquid crystal panel 11 includes a first substrate 111, a liquid crystal layer 112, and a second substrate 113 stacked sequentially. 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 located in the non-display area NA of the liquid crystal panel 11. In 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 opposite each other and spliced ​​together to form a positioning groove 10a. The compensation display panel 12 is disposed within the positioning groove 10a.

[0084] It should be noted that, in order for the LCD panel 11 to realize its display function, a backlight module needs to be provided on the light-incident side of the LCD panel 11. The backlight module provides a surface light source for the LCD panel 11.

[0085] In related technologies, when an LED display panel is attached to the splicing point of two adjacent LCD panels, the boundary of the LED display panel is a certain distance from the display area of ​​the LCD panel. If the LED display panel shifts due to attachment errors, making this distance too large, the light emitted by the backlight module will pass through the area between the LED display panel and the display area of ​​the LCD panel, resulting in light leakage. This distance is limited by the attachment accuracy of the LED display panel.

[0086] In this embodiment of the application, the splicing display panel 100 has a positioning groove 10a at the splicing area of ​​the liquid crystal panel 11, and the compensation display panel 12 is disposed in the positioning groove 10a. The positioning groove 10a makes the attachment of the compensation display panel 12 more accurate, 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 backlight module light leakage.

[0087] Furthermore, since the backlight module is located on the side of the first polarizer 151 away from the liquid crystal layer 112, some of the large-angle light emitted by the backlight module will be blocked by the compensation display panel 12. Compared to the compensation display panel 12 being directly located on the flat array substrate side, the compensation display panel 12 is located in the positioning groove 10a. The compensation display panel 12 blocks more large-angle light emitted from the backlight, further reducing the risk of backlight leakage. For example, if the compensation display panel 12 is located on the flat array substrate side, it can block light with an emission angle of 160 degrees or more. However, when the compensation display panel 12 is located in the positioning groove 10a, because it is moved a certain distance in the direction of light emission, it can block light with an emission angle of 150 degrees or more. Thus, the compensation display panel 12 can block more large-angle light, thereby further reducing the risk of backlight leakage.

[0088] The compensation display panel 12 is disposed in the positioning groove 10a by optical adhesive 13. The positioning groove 10a includes a first surface 101 and a second surface 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.

[0089] The difference between implementation three and the above embodiments is that a light-blocking layer 16 is provided on the second surface 102.

[0090] In this embodiment, the refractive index relationship between the optical adhesive 13 and the first substrate 1a1 is not limited; that is, their refractive indices can be the same or different.

[0091] In Embodiment 3, the splicing display panel 100 has a light-blocking layer 16 on the second surface 102 to block the light radiated from the backlight module to the groove 11a, which can reduce the risk of light leakage, reduce the backlight light interference compensation display panel 12, and reduce the risk of the compensation display panel 12 interfering with the liquid crystal panel 11.

[0092] The splicing display panel provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A splicing display panel, characterized in that, include: At least two liquid crystal panels are provided, with two adjacent liquid crystal panels joined together, and a seam between two adjacent liquid crystal panels. as well as A compensation display panel is disposed on the light-incident side of two adjacent liquid crystal panels and blocks the seam between them; The liquid crystal panel includes a first substrate, a liquid crystal layer, and a second substrate stacked sequentially. The first substrate is the light-incident side of the liquid crystal panel. A groove is provided on the side of the first substrate away from the liquid crystal layer. The groove is located in the 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 disposed in the positioning groove. The first substrate includes a first substrate, the groove is disposed on the side of the first substrate away from the liquid crystal layer, the compensation display panel is disposed in the positioning groove by optical adhesive, the refractive index of the optical adhesive is less 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 disposed opposite to the display surface of the compensation display panel, and the optical adhesive is bonded to the second surface to form a total internal reflection interface.

2. The splicing display panel according to claim 1, characterized in that, The depth of the groove is between 0.2 mm and 0.4 mm.

3. The splicing display panel according to claim 1, characterized in that, The distance from the edge of the display area of ​​the liquid crystal panel to the sidewall of the adjacent positioning groove is less than or equal to 50 micrometers, and the distance from the edge of the display area of ​​the liquid crystal panel to the sidewall of the compensation display panel is less than or equal to 100 micrometers.

4. The splicing display panel according to claim 1, characterized in that, The first substrate includes a thin-film transistor structure layer disposed on the side of the first substrate near the liquid crystal layer.

5. The splicing display panel according to any one of claims 1-4, characterized in that, The liquid crystal panel also includes a transparent frame adhesive, which surrounds the outer periphery of the liquid crystal layer and is disposed between the first substrate and the second substrate. The frame adhesive is located in the non-display area of ​​the liquid crystal panel and overlaps with the groove.

6. The splicing display panel according to claim 5, characterized in that, The second substrate includes a second substrate and a black matrix layer disposed on the side of the second substrate near the liquid crystal layer. The black matrix layer covers the display area and non-display area of ​​the liquid crystal panel. The compensation display panel includes a substrate and pixel devices disposed on the side of the substrate near the second substrate. In the forward projection direction of the splicing display panel, the black matrix layer is disposed between the pixel devices.

7. The splicing display panel according to claim 5, characterized in that, The seam is filled with encapsulating adhesive, which is connected to the frame adhesive. The refractive index of the encapsulating adhesive is the same as that of the frame adhesive.

8. The splicing display panel according to claim 5, characterized in that, The splicing display panel further includes a first polarizer and a second polarizer. The first polarizer is disposed on the side of the first substrate away from the liquid crystal layer. An opening is provided on the first polarizer. The opening overlaps with and communicates with the groove. The compensation display panel is disposed in the opening. The second polarizer is disposed on the side of the second substrate away from the liquid crystal layer. The second polarizer covers the display area and non-display area of ​​the liquid crystal panel. The second polarizer overlaps with the compensation display panel.

Images