Spliced display panel

Abstract

The embodiment of the invention discloses a spliced display panel. A splicing seam is formed between every two adjacent liquid crystal panels. The compensation display panel is arranged on the light incident sides of the two adjacent liquid crystal panels and shields the abutted seam; the liquid crystal panel comprises a first substrate, a liquid crystal layer and a second substrate which are sequentially stacked, a groove is formed in the side, away from the liquid crystal layer, of the first substrate, and the groove is formed 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 oppositely arranged and are spliced and communicated to form a positioning groove, and the compensation display panel is arranged in the positioning groove. According to the embodiment of the invention, the positioning groove is formed in the splicing area of the liquid crystal panel, so that the attaching precision of the compensation display panel is improved, the risk that the distance between the compensation display panel and the display area of the liquid crystal panel is too large is reduced, and the risk of light leakage is reduced.

Description

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 related technology of splicing MLED (Mini-LED / Micro-LED) light boards with LCD panels, the MLED light board is set at the seam between two adjacent LCD panels to cover the seam. Usually, the MLED light board is spliced ​​on the light-emitting side or light-incoming side of the LCD panel. Considering the requirements for flatness, the MLED light board is generally set 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. The light leakage is more obvious especially when viewed from the side. 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 spliced ​​area.

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

[0006] 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; and

[0007] A compensation display panel, which is arranged on the light incident side of two adjacent liquid crystal panels and blocks the joint;

[0008] 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;

[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 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 on both sides of the first surface.

[0014] 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 and the second surface are bonded to form a total reflection interface.

[0015] 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.

[0016] Optionally, in some embodiments of the present application, the liquid crystal panel further includes a transparent frame glue, which is disposed 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 the frame glue overlaps with the groove.

[0017] Optionally, in some embodiments of the present application, the second substrate includes a second substrate and a black matrix layer disposed 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 disposed on a side of the base close to the second substrate;

[0018] In the orthographic projection direction of the spliced ​​display panel, the black matrix layer is arranged between the pixel devices.

[0019] 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.

[0020] 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 arranged on a side of the first substrate away from the liquid crystal layer, an opening is arranged on the first polarizer, the opening overlaps with and is connected to the groove, and the compensation display panel is arranged in the opening;

[0021] 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.

[0022] 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, 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 arranged on the side of the first substrate away from the liquid crystal layer, and the groove is arranged 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 are spliced ​​and connected to form a positioning groove, and the compensation display panel is arranged in the positioning groove.

[0023] 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 excessive distance between the compensation display panel and the display area of ​​the liquid crystal panel, that is, the attachment accuracy of the compensation display panel is improved, and the risk of excessive distance between the compensation display panel and the display area of ​​the liquid crystal panel is reduced, 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

[0024] Figure 1 is a structural schematic diagram of a spliced ​​display panel provided in Embodiment 1 of the present application;

[0025] Figure 2 yes Figure 1 Enlarged view of the middle M part;

[0026] Figure 3 is a structural schematic diagram of a spliced ​​display panel provided in Embodiment 2 of the present application;

[0027] Figure 4 yes Figure 3 A magnified view of the N part;

[0028] Figure 5 is a structural schematic diagram of a spliced ​​display panel provided in Embodiment 3 of the present application;

[0029] Figure 6 yes Figure 5 Enlarged view of section K. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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 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 stated, 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 drawings; while "inside" and "outside" refer to the outline of the device; the terms "first", "second", "third", etc. are used only as markings, and no numerical requirements are imposed or order is established.

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

[0032] Embodiment 1

[0033] Please refer to Figure 1 and Figure 2 The present application embodiment 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, and the non-display area NA is located on at least one side of the display area AA.

[0034] Two adjacent liquid crystal panels 11 are spliced. 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 which are 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 arranged in the positioning groove 10a.

[0035] It should be noted that, in order for the liquid crystal panel 11 to realize the display function, a backlight module needs to be arranged 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.

[0036] 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 the non-display area NA can transmit the display image of the compensation display panel 12.

[0037] Among them, in the related technology, when the LED (light emitting diode) display panel is attached to the joint of two adjacent liquid crystal panels, the boundary of the LED display panel is at a certain distance from the display area of ​​the liquid crystal panel. When the LED display panel is offset due to attachment error, making the distance too large, the light emitted by the backlight module will pass through the area between the display area of ​​the LED display panel and the liquid crystal panel, causing light leakage. Among them, the distance is limited by the attachment accuracy of the LED display panel, and the attachment error of the LED display panel is ±0.15 mm.

[0038] 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 arranged in the positioning groove 10a. Due to the setting of the positioning groove 10a, the attachment of the compensation display panel 12 is more precise, which reduces 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.

[0039] In addition, since the backlight module is arranged on the side of the first polarizer 151 away from the liquid crystal layer 112, part of the large-angle light emitted by the backlight module will be blocked by the compensation display panel 12. Compared with the compensation display panel 12 being directly arranged on the flat array substrate side, the compensation display panel 12 is arranged in the positioning groove 10a, and the compensation display panel 12 plays a role in blocking more large-angle light emitted by the backlight, further reducing the risk of backlight leakage. For example, if the compensation display panel 12 is arranged on the flat array substrate side, the compensation display panel 12 can block light with an exit angle of more than 160 degrees, and when the compensation display panel 12 is arranged in the positioning groove 10a, since the compensation display panel 12 moves a certain distance in the direction of light emission, the compensation display panel 12 can block light with an exit angle of more than 150 degrees, and then 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 should be understood that if the depth of the groove 11a is too deep, the supporting performance of the first substrate 1a1 will be reduced, and if the depth of the groove 11a is too shallow, the compensation display panel 12 will not be able to be arranged in the groove 11a, and the effect of precise fitting cannot be achieved. Therefore, the selection of the above-mentioned depth of the groove 11a can ensure the supporting performance of the first substrate 1a1, and enable the compensation display panel 12 to be accurately attached to the groove 11a.

[0042] Optionally, a photolithography process is used to form the groove 11a on the first substrate 1a1.

[0043] 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.

[0044] 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.

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

[0046] Optionally, the liquid crystal panel 11 may be a conventional panel, a COA (color filter layer on array substrate) panel, or a BOA (black matrix on array substrate) panel. This embodiment is described by taking the liquid crystal panel 11 as a conventional panel as an example, 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 may be a Mini-LED panel, a Micro-LED panel, an OLED panel or a 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 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.

[0049] Optionally, the groove 11a can be formed by etching the first substrate 1a1 first, and then the thin film transistor structure layer is prepared, so that the groove 11a formed has high precision. Alternatively, the groove 11a can be formed by grinding the first substrate 1a1 after the liquid crystal panel is formed.

[0050] Optionally, the thin film transistor structure layer 1a2 includes a thin film transistor and a pixel electrode layer, and 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 shields the thin film transistor to prevent light from irradiating the thin film transistor.

[0052] In addition, the light shielding layer 1a3 is not only arranged in the display area AA, but also arranged at the junction of the non-display area NA and the display area AA on one side close to the non-display area NA. In the orthographic projection direction of the spliced ​​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. Such a setting can further reduce the risk of light leakage on the one hand, and reduce the light crosstalk between the liquid crystal panel 11 and the compensation display panel 12 on the other hand, and also saves process.

[0053] Optionally, the compensation display panel 12 is arranged in the positioning groove 10a through an optical glue 13. The refractive index of the optical glue 13 is greater than the refractive index 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 arranged opposite to the display surface of the compensation display panel 12. The optical glue 13 is attached to the first surface 101 to form a total reflection interface fs. The total reflection interface fs is at least located 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 be used 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.

[0055] 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, thereby reducing the effect of the light of the compensation display panel 12 interfering with the liquid crystal panel 11.

[0056] 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. The sealant 114 overlaps the groove 11a.

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

[0058] Optionally, the second substrate 113 includes a second substrate 1b1 and a black matrix layer 1b2 disposed on a side of the second substrate 1b1 close to 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 base 121 and a pixel device 122 disposed on a side of the base 121 close to the second substrate 113.

[0059] 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 .

[0060] The black matrix layer 1b2 is used to cover the display area AA and the non-display area NA, which can avoid the pixel light crosstalk of the liquid crystal panel 11 and the compensation display panel 12 at one time, and make the contrast of the liquid crystal panel 11 and the compensation display panel 12 tend to be consistent, and save process steps. In addition, the black matrix layer 1b2 is set in the non-display area NA to further reduce the risk of light leakage.

[0061] Optionally, the compensation display panel 12 further includes an encapsulation layer, which encapsulates and covers the second substrate 1b1 and the pixel device 122. The encapsulation layer is connected with the optical glue 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 a side of the second substrate 1b1 close to the liquid crystal layer 112. The color filter layer 1a3 is disposed between the black matrix layers 1b2.

[0064] Optionally, the gap pf is filled with a packaging glue 14, and the packaging glue 14 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.

[0065] The setting of 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.

[0066] 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. An opening 15a is disposed on the first polarizer 151. The opening 15a overlaps with and is connected to the groove 11a. The compensation display panel 12 is disposed in 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 arranged in the opening 15a and the groove 11a, thereby improving the flatness.

[0068] 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.

[0069] 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.

[0070] Embodiment 2

[0071] Please refer to Figure 3 and Figure 4 In the second embodiment, a spliced ​​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, and the non-display area NA is located at least on one side of the display area AA.

[0072] Two adjacent liquid crystal panels 11 are spliced. 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 which are 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 arranged in the positioning groove 10a.

[0073] It should be noted that, in order for the liquid crystal panel 11 to realize the display function, a backlight module needs to be arranged 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.

[0074] Among them, in the related technology, when the LED display panel is attached to the joint of two adjacent liquid crystal panels, the boundary of the LED display panel is at a certain distance from the display area of ​​the liquid crystal panel. When the LED display panel is offset due to attachment error, making the 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 liquid crystal panel, causing light leakage. Among them, the distance is limited by the attachment accuracy of the LED display panel.

[0075] 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 arranged in the positioning groove 10a. Due to the setting of the positioning groove 10a, the attachment of the compensation display panel 12 is more precise, which reduces 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.

[0076] In addition, since the backlight module is arranged on the side of the first polarizer 151 away from the liquid crystal layer 112, part of the large-angle light emitted by the backlight module will be blocked by the compensation display panel 12. Compared with the compensation display panel 12 being directly arranged on the flat array substrate side, the compensation display panel 12 is arranged in the positioning groove 10a, and the compensation display panel 12 plays a role in blocking more large-angle light emitted by the backlight, further reducing the risk of backlight leakage. For example, if the compensation display panel 12 is arranged on the flat array substrate side, the compensation display panel 12 can block light with an exit angle of more than 160 degrees, and when the compensation display panel 12 is arranged in the positioning groove 10a, since the compensation display panel 12 moves a certain distance in the direction of light emission, the compensation display panel 12 can block light with an exit angle of more than 150 degrees, and then 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 through the 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 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 and the second surface 102 are bonded to form a total reflection interface fs.

[0079] Since the refractive index of the optical glue 13 is smaller than the refractive index 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 compensating the display panel 12.

[0080] In addition, the reflected light is radiated to the liquid crystal layer 112, thereby improving the utilization rate of the backlight. When the backlight module is an edge-entry 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.

[0081] Embodiment 3

[0082] Please refer to Figure 5 and Figure 6 In the third embodiment, a spliced ​​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, and the non-display area NA is located at least on one side of the display area AA.

[0083] Two adjacent liquid crystal panels 11 are spliced. 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 which are 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 arranged in the positioning groove 10a.

[0084] It should be noted that, in order for the liquid crystal panel 11 to realize the display function, a backlight module needs to be arranged 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.

[0085] Among them, in the related technology, when the LED display panel is attached to the joint of two adjacent liquid crystal panels, the boundary of the LED display panel is at a certain distance from the display area of ​​the liquid crystal panel. When the LED display panel is offset due to attachment error, making the 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 liquid crystal panel, causing light leakage. Among them, the distance is limited by the attachment accuracy of the LED display panel.

[0086] 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 arranged in the positioning groove 10a. Due to the setting of the positioning groove 10a, the attachment of the compensation display panel 12 is more precise, which reduces 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.

[0087] In addition, since the backlight module is arranged on the side of the first polarizer 151 away from the liquid crystal layer 112, part of the large-angle light emitted by the backlight module will be blocked by the compensation display panel 12. Compared with the compensation display panel 12 being directly arranged on the flat array substrate side, the compensation display panel 12 is arranged in the positioning groove 10a, and the compensation display panel 12 plays a role in blocking more large-angle light emitted by the backlight, further reducing the risk of backlight leakage. For example, if the compensation display panel 12 is arranged on the flat array substrate side, the compensation display panel 12 can block light with an exit angle of more than 160 degrees, and when the compensation display panel 12 is arranged in the positioning groove 10a, since the compensation display panel 12 moves a certain distance in the direction of light emission, the compensation display panel 12 can block light with an exit angle of more than 150 degrees, and then 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 through the 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 the third embodiment and the above-mentioned embodiment is that a light blocking layer 16 is disposed on the second surface 102 .

[0090] There is no restriction on the refractive index relationship between 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.

[0091] The spliced ​​display panel 100 of the third embodiment has 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.

[0092] 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 of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method 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, characterized in that: include: 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, characterized in that: The depth of the groove is between 0.2 mm and 0.4 mm.

3. The spliced ​​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 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, characterized in that: 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, characterized in that: 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.

6. The spliced ​​display panel according to claim 4, characterized in that: 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.

7. The spliced ​​display panel according to claim 4, characterized in that: 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.

8. The spliced ​​display panel according to any one of claims 1 to 7, characterized in that: 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.

9. The spliced ​​display panel according to claim 8, characterized in that: 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.

10. The spliced ​​display panel according to claim 8, characterized in that: 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.

11. The spliced ​​display panel according to claim 8, characterized in that: 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.

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