Tiled display device and display terminal

Abstract

A tiled display device and a display terminal. The tiled display device comprises a bearing plate, a plurality of display sub-panels and an encapsulation layer; the display sub-panels each comprise a substrate and a plurality of light-emitting units, a seam being provided between every two adjacent display sub-panels; the encapsulation layer is arranged on the sides of the display sub-panels facing away from the bearing plate, and continuously covers the plurality of display sub-panels and the seams between the multiple substrates, the absolute value of the difference between the refractive index of the encapsulation layer and the refractive index of the substrates being less than or equal to 0.1.

Description

Splicing display device and display terminal

[0001] This application claims priority to Chinese patent application No. 202311734805.4 filed on December 15, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a spliced ​​display device and a display terminal. Background Art

[0003] Micro-LED displays (Micro-LED Displays) are gaining increasing attention due to their advantages of high color saturation, contrast, fast response speed, and high reliability, and have quickly become a new hotspot in display development.

[0004] Because large-scale Micro-LED display devices are difficult to produce, small and medium-sized Micro-LED display sub-panels are usually manufactured first, and then multiple sub-panels are spliced ​​together to form a larger display device. The seam between adjacent sub-panels will cause visual discontinuity and light effect differences in the spliced ​​display device, affecting the display quality of the spliced ​​display device.

[0005] Therefore, it is urgent to solve the above technical problems. Summary of the Invention

[0006] The present application provides a spliced ​​display device and a display terminal to improve the technical problem that the splicing seam between two adjacent display sub-panels in the spliced ​​display device causes visual discontinuity of the image and difference in light effect, which affects the display effect.

[0007] To solve the above problem, the technical solution provided by this application is as follows:

[0008] The present application provides a spliced ​​display device, comprising:

[0009] Loading plate;

[0010] A plurality of display sub-panels are arranged on the carrier plate, wherein the display sub-panels include a substrate and a plurality of light-emitting units, wherein the light-emitting units are arranged on a side of the substrate away from the carrier plate, and a seam is formed between two adjacent substrates;

[0011] An encapsulation layer is provided on a side of the display sub-panel facing away from the carrier plate, and the encapsulation layer continuously covers the joints between the plurality of display sub-panels and the plurality of substrates;

[0012] The absolute value of the difference between the refractive index of the encapsulation layer and the refractive index of the substrate is less than or equal to 0.1.

[0013] The present application further provides a display terminal, the display terminal including a spliced ​​display device, the spliced ​​display device including:

[0014] Loading plate;

[0015] A plurality of display sub-panels are arranged on the carrier plate, wherein the display sub-panels include a substrate and a plurality of light-emitting units, wherein the light-emitting units are arranged on a side of the substrate away from the carrier plate, and a seam is formed between two adjacent substrates;

[0016] An encapsulation layer is provided on a side of the display sub-panel facing away from the carrier plate, and the encapsulation layer continuously covers the joints between the plurality of display sub-panels and the plurality of substrates;

[0017] The absolute value of the difference between the refractive index of the encapsulation layer and the refractive index of the substrate is less than or equal to 0.1. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic diagram of the three-dimensional structure of a spliced ​​display device provided in an embodiment of the present application;

[0019] FIG2 is a schematic cross-sectional view of the structure of the first spliced ​​display device taken at AA in FIG1 ;

[0020] FIG3 is a schematic cross-sectional view of the second splicing display device taken at AA in FIG1 ;

[0021] FIG4 is a schematic cross-sectional view of the structure of a third spliced ​​display device at AA in FIG1 ;

[0022] FIG5 is a schematic cross-sectional view of the structure of a fourth spliced ​​display device taken at AA in FIG1 ;

[0023] FIG. 6 is a schematic cross-sectional view of the fifth spliced ​​display device at AA in FIG. 1 . Modes for Carrying Out the Invention

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a 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; and "inside" and "outside" refer to the outline of the device.

[0025] As shown in Figures 1 and 2, the present application discloses a spliced ​​display device. The spliced ​​display device includes a carrier plate 1, multiple display sub-panels 2, and an encapsulation layer 4. The display sub-panels 2 are arranged on the carrier plate 1, and the display sub-panels 2 include a substrate 21 and multiple light-emitting units 22. The light-emitting units 22 are arranged on the side of the substrate 21 facing away from the carrier plate 1, and a seam 20 is provided between two adjacent display sub-panels 2. The encapsulation layer 4 is arranged on the side of the display sub-panels 2 facing away from the carrier plate 1, and the encapsulation layer 4 continuously covers the multiple display sub-panels 2 and the seams 20 between the multiple substrates 21. The absolute value of the difference between the refractive index of the encapsulation layer 4 and the refractive index of the substrate 21 is less than or equal to 0.1.

[0026] In this embodiment, the spliced ​​display device may be a Micro-LED display device or the like.

[0027] In this embodiment, a carrier plate 1 is used to provide a support surface for multiple display sub-panels 2. The carrier plate 1 can be made of glass, metal, or the like. For example, the metal plate can be aluminum. Using a metal plate as the carrier plate 1 can improve the heat dissipation performance of the spliced ​​display device.

[0028] In this embodiment, the display sub-board 2 is disposed on the carrier board 1 and includes a substrate 21 and a light-emitting unit 22. A driving circuit is provided on the substrate 21 for driving the light-emitting unit 22 to emit light. The substrate 21 may be made of, but is not limited to, glass.

[0029] The light emitting unit 22 may be a micro light emitting diode, a single-color light emitting chip 22a, etc., but is not limited thereto.

[0030] A seam 20 is provided between two adjacent display sub-panels 2. This seam 20 is the gap between the two adjacent display sub-panels 2. Due to the precision limitations of the manufacturing process for the substrate 21, seam 20 cannot be eliminated. Because the refractive index of the air at seam 20 is inconsistent with that of the display sub-panels 2, seam 20 causes visual discontinuity in the image and variations in lighting effects, affecting the display quality of the tiled display device.

[0031] The material of the encapsulation layer 4 may be encapsulation glue, etc. The material of the encapsulation glue may be silicone, acrylic resin, etc. The encapsulation layer 4 is formed by a coating process and is cured by ultraviolet light.

[0032] It should be noted that the encapsulation layer 4 is integrated, that is, the encapsulation layer 4 continuously covers the plurality of display sub-panels 2 and the seam 20. With the above arrangement, the difference in light effect at the seam 20 can be reduced.

[0033] In this embodiment, the material of the substrate 21 can be glass, etc. The refractive index of the material of the encapsulation layer 4 is close to the refractive index of the substrate 21. For example, when the material of the substrate 21 is glass, the refractive index of glass ranges from 1.4 to 1.7. Correspondingly, a resin with a refractive index range of 1.4 to 1.7 can be selected, and the absolute value of the difference between the refractive index of the resin and the refractive index of the glass is less than or equal to 0.1.

[0034] Optionally, the encapsulation layer 4 includes a single-layer material or a multi-layer composite material, and the refractive index of the encapsulation layer 4 is in the range of 1.4 to 1.7.

[0035] In some embodiments, the refractive index of the encapsulation layer 4 can be adjusted by adding high-refractive particles. The materials of the high-refractive particles include titanium dioxide, zirconium oxide, etc.

[0036] The present application reduces the optical difference between the seam 20 and the substrate 21 by arranging a continuous encapsulation layer 4 on the display sub-panel 2, the encapsulation layer 4 covering the seam 20, and matching the refractive index of the encapsulation layer 4 with the refractive index of the substrate 21, thereby improving the visual discontinuity and light effect difference of the image caused by the seam 20.

[0037] It should be noted that to reduce the optical difference between the seam 20 and the substrate 21, the refractive index of the material of the encapsulation layer 4 should be as close as possible to the refractive index of the material of the substrate 21. For example, the absolute value of the difference between the refractive index of the material of the encapsulation layer 4 and the refractive index of the material of the substrate 21 is less than or equal to 0.1. Alternatively, the absolute value of the difference between the refractive index of the material of the encapsulation layer 4 and the refractive index of the material of the substrate 21 is less than 0.05.

[0038] When the difference between the refractive index of the material of the encapsulation layer 4 and the refractive index of the material of the substrate 21 is close, the light does not refract at the critical surface between the encapsulation layer 4 and the substrate 21, or the difference between the refraction angle and the incident angle is small, so that the optical performance of the light at the seam 20 is close to that at other positions, which can reduce the visual discontinuity and light effect difference of the image of the splicing display device.

[0039] In some embodiments, the light emitting units 22 are evenly arranged on the display sub-panel 2. That is, in the same display sub-panel 2, the distance between two adjacent light emitting units 22 of the same color is the first distance S1, and the first distance S1 of multiple display sub-panels 2 is the same.

[0040] In two adjacent display sub-panels 2, the spacing between two adjacent light-emitting units 22 of the same color located on both sides of the seam 20 is a second spacing S2. The second spacing S2 is close to the first spacing S1. The ratio S2 / S1 of the second spacing S2 to the first spacing S1 ranges from 0.85 to 1.15. Optionally, the ratio of the second spacing S2 to the first spacing S1 ranges from 0.95 to 1.05. By ensuring that the ratio of the second spacing S2 to the first spacing S1 meets the above requirements, the spacing between two adjacent light-emitting units 22 at the seam 20 can be consistent with the spacing between two adjacent light-emitting units 22 at other locations, further reducing the difference in the image display.

[0041] In the spliced ​​display device of the present application, as shown in FIG2 , which is a schematic cross-sectional view of the first spliced ​​display device provided in an embodiment of the present application, a filling portion 3 is provided in the spliced ​​seam 20 to fill the spliced ​​seam 20 . The filling portion 3 is made of an optical adhesive or a light-shielding adhesive, and the encapsulation layer 4 covers the filling portion 3 .

[0042] In this embodiment, the material of the substrate 21 may be glass, for example, and the material of the filling portion 3 may be resin, for example. It should be understood that the refractive index of the material of the filling portion 3 is close to that of the substrate 21, thereby reducing the difference in light efficiency at the seam 20. For example, when the material of the substrate 21 is glass, the refractive index of glass ranges from 1.4 to 1.7. Accordingly, a resin with a refractive index range of 1.4 to 1.7 can be selected, and the absolute value of the difference between the refractive index of the resin and the refractive index of the glass should be less than or equal to 0.1.

[0043] In this embodiment, the peripheral side of the filling portion 3 abuts against the peripheral side of the substrate 21 , and the first surface 31 of the filling portion 3 facing away from the carrier plate 1 is flush with the second surface 211 of the substrate 21 facing away from the carrier plate 1 .

[0044] In this embodiment, the side surface of the substrate 21 close to the carrier plate 1 is the lower surface, the side surface of the substrate 21 facing away from the carrier plate 1 is the second surface 211, and the peripheral side of the substrate 21 refers to the multiple side surfaces connecting the second surface 211 and the lower surface of the substrate 21. The side surface of the filling portion 3 facing away from the carrier plate 1 is the first surface 31, the side surface of the filling portion 3 close to the carrier plate 1 is the lower surface, and the peripheral side of the filling portion 3 refers to the multiple side surfaces connecting the first surface 31 and the lower surface of the filling portion 3.

[0045] The filling portion 3 is filled in the joint 20 , and the peripheral side of the filling portion 3 abuts against the peripheral side of the substrate 21 .

[0046] In this embodiment, the first surface 31 of the filling portion 3 is flush with the second surface 211 of the substrate 21 , so that the filling portion 3 and the substrate 21 form a flat surface.

[0047] In this embodiment, the spliced ​​display device further includes a cover plate 6, which is disposed on the side of the display sub-panel 2 facing away from the carrier plate 1. The cover plate 6 can be made of, but is not limited to, glass, polyimide, polyethylene terephthalate, or other materials. The cover plate 6 protects the light-emitting units 22 from damage by moisture and oxygen.

[0048] In this embodiment, as shown in FIG. 2 , the filling portion 3 is filled in the joint 20 , and the encapsulation layer 4 covers the plurality of display sub-panels 2 and the filling portion 3 .

[0049] Specifically, the filling portion 3 may be optical glue, for example, the optical glue may be acrylic resin, epoxy resin, etc. The optical glue may be formed in the joint 20 by inkjet printing or doctor blade coating, and then cured.

[0050] In this embodiment, the cover plate 6 may cover the encapsulation layer 4 , and the cover plate 6 may protect the light emitting unit 22 from being damaged by moisture and oxygen.

[0051] In the spliced ​​display device of the present application, as shown in Figure 3, which is a schematic cross-sectional view of the structure of the second spliced ​​display device provided in an embodiment of the present application, the second spliced ​​display device differs from the first spliced ​​display device in that the encapsulation layer 4 and the filling portion 3 are made of the same material and are integrally formed.

[0052] Unlike the first spliced ​​display device, in this embodiment, encapsulation glue is applied to multiple display sub-panels 2 and filled into the joints 20. The encapsulation glue is then cured by ultraviolet light to form a filling portion 3 and an encapsulation layer 4. This arrangement simplifies the process, and the encapsulation glue and the filling portion 3 are made of the same material, resulting in better overall consistency.

[0053] In this embodiment, the cover plate 6 may cover the encapsulation layer 4 , and the cover plate 6 may protect the light emitting unit 22 from being damaged by moisture and oxygen.

[0054] In the spliced ​​display device of the present application, as shown in FIG4 , FIG4 is a schematic cross-sectional view of the structure of the third spliced ​​display device provided in an embodiment of the present application. The third spliced ​​display device differs from the first spliced ​​display device in that the third spliced ​​display device further includes a light shielding layer 5. The light shielding layer 5 is disposed on the side of the display sub-panel 2 facing away from the carrier plate 1. The light shielding layer 5 has multiple openings. The orthographic projections of the light-emitting units 22 on the light shielding layer 5 are located within the openings. The light shielding layer 5 continuously covers the multiple display sub-panels 2.

[0055] In this embodiment, the light-shielding layer 5 includes a first light-shielding sublayer and a second light-shielding sublayer disposed in the same layer. The first light-shielding sublayer can be formed on the display sub-panel 2 using processes such as coating, exposure, development, and post-baking. The first light-shielding sublayer includes multiple openings, and the light-emitting units 22 can be transferred in bulk to the display sub-panel 2. The orthographic projections of the light-emitting units 22 on the first light-shielding sublayer are located within the openings.

[0056] The second light-shielding sub-layer can be formed by inkjet printing or scraping, etc. The second light-shielding sub-layer covers the filling part 3, the second light-shielding sub-layer is connected to the first light-shielding sub-layer, and the surface of the second light-shielding sub-layer facing away from the carrier plate 1 is flush with the surface of the first light-shielding sub-layer facing away from the carrier plate 1, so that the light-shielding layer 5 forms a flat upper surface.

[0057] In this embodiment, the first and second light-shielding sublayers can be made of the same material. The light-shielding layer 5 can be made of a black resin or other light-absorbing material. The light-shielding layer 5 can shield the seam 20, reducing its visibility and thereby reducing the visual discontinuity and light effect differences caused by the seam 20.

[0058] In this embodiment, the encapsulation layer 4 covers the light shielding layer 5 .

[0059] In some embodiments, the filling portion 3 may be made of the same material as the second light-shielding sub-layer. The filling portion 3 may be formed together with the second light-shielding sub-layer, thereby simplifying the manufacturing process of the spliced ​​display device.

[0060] In the spliced ​​display device of the present application, as shown in FIG. 2 to FIG. 4 , the light-emitting unit 22 includes a first micro LED 221 , a second micro LED 222 , and a third micro LED 223 of different colors.

[0061] In this embodiment, the first micro LED 221 may be a red micro LED for emitting red light, the second micro LED 222 may be a green micro LED for emitting green light, and the third micro LED 223 may be a blue micro LED for emitting blue light.

[0062] The light emitting unit 22 may be transferred onto the substrate 21 using mass transfer technology and connected to the driving circuit on the substrate 21 .

[0063] In the spliced ​​display device of the present application, as shown in FIG5 , FIG5 is a schematic cross-sectional structure diagram of the fourth spliced ​​display device provided in an embodiment of the present application. The fourth spliced ​​display device differs from the first spliced ​​display device in that the light-emitting unit 22 is a monochrome light-emitting chip 22a. The spliced ​​display device includes a color conversion layer 22b, which is disposed on the side of the monochrome light-emitting chip 22a facing away from the substrate 21. The color conversion layer 22b includes a light-shielding layer 5 and a plurality of color conversion parts embedded in the light-shielding layer 5. One color conversion part corresponds to one monochrome light-emitting chip 22a, and the color conversion part includes a first color conversion part 221b, a second color conversion part 222b, and a third color conversion part 223b.

[0064] In this embodiment, the light-emitting unit 22 is a single-color light-emitting chip 22 a , and the single-color light-emitting chip 22 a may be a blue micro-LED or a UV micro-LED.

[0065] In this embodiment, the monochromatic light-emitting chip 22a can emit blue light. The color conversion portion can be made of quantum dot material. The blue light emitted by the monochromatic light-emitting chip 22a can excite quantum dot materials of different colors, emitting light of different colors. Because the monochromatic light-emitting chip 22a can be fabricated directly on a sapphire substrate, there is no need to use mass transfer technology to transfer the monochromatic light-emitting chip 22a, simplifying the manufacturing process and improving production yield.

[0066] Furthermore, the epitaxial structures and material systems of red, green, and blue micro-LEDs differ, resulting in different driving voltages and photoelectric conversion efficiency decay trends, which can easily cause visual color difference during display. This embodiment, however, uses quantum dot color conversion technology. Quantum dot materials offer the advantages of wavelength tunability, high color purity, high quantum yield, and low cost, which can reduce visual color difference.

[0067] In this embodiment, the color conversion portion includes a first color conversion portion 221b, a second color conversion portion 222b, and a third color conversion portion 223b. The first color conversion portion 221b can be a red light quantum dot portion, the second color conversion portion 222b can be a green light quantum dot portion, and the third color conversion portion 223b can be a transparent layer.

[0068] The blue micro LED excites the first color conversion portion 221 b to generate red light, and the blue micro LED excites the second color conversion portion 222 b to generate green light. The blue light emitted by the blue micro LED is emitted through the third color conversion portion 223 b.

[0069] In this embodiment, the encapsulation layer 4 can not only protect the monochrome light-emitting chip 22a, but also separate the color conversion part from the monochrome light-emitting chip 22a, preventing the heat of the monochrome light-emitting chip 22a from causing the quantum dot material to fail, thereby improving the service life of the quantum dot material and further improving the product life of the spliced ​​display device.

[0070] Furthermore, the color conversion layer 22b includes a light shielding layer 5 having a plurality of openings, wherein the first color conversion portion 221b, the second color conversion portion 222b, and the third color conversion portion 223b are disposed in the openings. The light shielding layer 5 covers the filling portion 3 between two adjacent display sub-panels 2.

[0071] The material of the light-shielding layer 5 can be a black resin or other light-absorbing material. The light-shielding layer 5 prevents color crosstalk between identical light-emitting units 22. Furthermore, the light-shielding layer 5 covers the filling portion 3 and absorbs the wide-angle blue light emitted by the sidewalls of the monochromatic light-emitting chip 22a near the seam 20, further eliminating the effect of the seam 20 on the display.

[0072] In this embodiment, the light-shielding layer 5 can be manufactured using a process of coating, exposure, development, and post-baking. After fabrication, the light-shielding layer 5 includes a plurality of openings. The first color conversion portion 221b, the second color conversion portion 222b, and the third color conversion portion 223b are fabricated within the openings using a process of coating, exposure, development, and post-baking, or inkjet printing.

[0073] It should be noted that the opening is aligned with the monochromatic light emitting chip 22 a , and the orthographic projection of the monochromatic light emitting chip 22 a on the color conversion layer 22 b is located within the opening.

[0074] In this embodiment, the thickness of the light shielding layer 5 is greater than or equal to 10 micrometers, and the thickness of the light shielding layer 5 is less than or equal to 30 micrometers.

[0075] In this embodiment, the thickness of the first color conversion portion 221b, the second color conversion portion 222b, and the third color conversion portion 223b is greater than or equal to 5 microns, and the thickness of the first color conversion portion 221b, the second color conversion portion 222b, and the third color conversion portion 223b is less than or equal to 25 microns.

[0076] In this embodiment, the spliced ​​display device further includes a cover plate 6, which is disposed on the side of the color conversion layer 22b facing away from the substrate 21. The cover plate 6 can be made of, but is not limited to, glass, polyimide, polyethylene terephthalate, or other materials. The cover plate 6 protects the quantum dot material from damage by moisture and oxygen.

[0077] In the spliced ​​display device of the present application, as shown in Figure 6, which is a schematic cross-sectional view of the fifth spliced ​​display device provided in an embodiment of the present application, the fifth spliced ​​display device differs from the fourth spliced ​​display device in that the fifth spliced ​​display device further includes a filter layer 22c.

[0078] The spliced ​​display device includes a filter layer 22c, which is arranged on the side of the color conversion layer 22b facing away from the substrate 21. The filter layer 22c includes a first color filter portion 221c, a second color filter portion 222c, and a third color filter portion 223c. The first color filter portion 221c is arranged corresponding to the first color conversion portion 221b, the second color filter portion 222c is arranged corresponding to the second color conversion portion 222b, and the third color filter portion 223c is arranged corresponding to the third color conversion portion 223b.

[0079] In this embodiment, the filter layer 22c can be manufactured by coating, exposure, development, and post-baking. The first color filter portion 221c can be a red filter portion, and the first color conversion portion 221b can be a red quantum dot portion. The orthographic projection of the first color filter portion 221c on the display surface at least partially overlaps with the orthographic projection of the first color conversion portion 221b on the display surface.

[0080] The second color filter 222c may be a green filter, and the second color conversion portion 222b may be a green quantum dot portion. The orthographic projection of the second color filter 222c on the display surface at least partially overlaps with the orthographic projection of the second color conversion portion 222b on the display surface.

[0081] The third color filter 223c may be a blue filter, and the third color conversion portion 223b may be a transparent layer. The orthographic projection of the third color filter 223c on the display surface at least partially overlaps with the orthographic projection of the third color conversion portion 223b on the display surface.

[0082] Because some of the light generated by the monochromatic light-emitting chip 22a after it excites the quantum dot material remains unexcited by the quantum dot material and retains its original color, this can result in impure luminescent color. To address this, a red filter is provided above the red quantum dot portion. This filter filters out blue light that has not been excited by the quantum dot material, thereby making the red light purer. Similarly, a green filter can further purify green light, and a blue filter can further purify blue light.

[0083] The present application also provides a display terminal, which includes the above-mentioned splicing display device.

[0084] In this embodiment, the mobile terminal may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, or a navigator.

[0085] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0086] The above is a detailed introduction to a splicing display device and a display terminal provided in the embodiments 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 technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A splicing display device, comprising: Loading plate; A plurality of display sub-panels are arranged on the carrier plate, wherein the display sub-panels include a substrate and a plurality of light-emitting units, wherein the light-emitting units are arranged on a side of the substrate away from the carrier plate, and a seam is formed between two adjacent substrates; An encapsulation layer is arranged on a side of the display sub-panel away from the carrier plate, and the encapsulation layer continuously covers the joints between the plurality of display sub-panels and the plurality of substrates; Wherein, an absolute value of a difference between a refractive index of the encapsulation layer and a refractive index of the substrate is less than or equal to 0.

1.

2. The spliced ​​display device according to claim 1, wherein: A filling part for filling the joint is arranged in the joint, the material of the filling part includes optical glue or light-shielding glue, and the encapsulation layer covers the filling part.

3. The splicing display device according to claim 2, wherein: The first surface of the filling portion facing away from the carrying plate is flush with the second surface of the substrate facing away from the carrying plate.

4. The spliced ​​display device according to claim 2, wherein: The filling part is an optical glue with a refractive index of 1.4 to 1.7, and the packaging layer is made of the same material as the filling part.

5. The spliced ​​display device according to claim 4, wherein: The encapsulation layer and the filling portion are integrally formed.

6. The spliced ​​display device according to claim 2, wherein: The spliced ​​display device includes a light-shielding layer arranged on the side of the packaging layer close to the carrier board, the light-shielding layer continuously covers the multiple substrates and the splicing seam, and the material of the light-shielding layer is the same as the material of the filling part, both of which are light-shielding glue; wherein the light-shielding layer is provided with a plurality of openings, and the orthographic projection of the light-emitting unit on the light-shielding layer is located within the opening.

7. The spliced ​​display device according to claim 1, wherein: The ratio of the distance between two adjacent light-emitting units of the same color on both sides of the seam to the distance between two adjacent light-emitting units of the same color on any display sub-panel is 0.85 to 1.

15.

8. The spliced ​​display device according to claim 1, wherein: The light-emitting unit includes a monochromatic light-emitting chip, a color conversion layer is provided on a side of the packaging layer away from the carrier board, the color conversion layer includes a light-shielding layer and a plurality of color conversion parts embedded in the light-shielding layer; one color conversion part corresponds to one monochromatic light-emitting chip, and the color conversion part includes a first color conversion part, a second color conversion part, and a third color conversion part; The color conversion layer continuously covers the joints between the plurality of display sub-panels and the plurality of substrates, and the light shielding layer covers the joints between the plurality of substrates.

9. The spliced ​​display device according to claim 8, wherein: The monochromatic light emitting chip is configured to emit blue light.

10. The spliced ​​display device according to claim 8, wherein: The spliced ​​display device also includes a filter layer, which is arranged on the side of the color conversion layer away from the substrate. The filter layer includes a first color filter portion, a second color filter portion, and a third color filter portion. The filter color of the first color filter portion is set corresponding to the first color conversion portion, the filter color of the second color filter portion is set corresponding to the second color conversion portion, and the filter color of the third color filter portion is set corresponding to the third color conversion portion.

11. The spliced ​​display device according to claim 8, wherein: The thickness of the light shielding layer ranges from 10 micrometers to 30 micrometers, the thickness of the color conversion portion ranges from 5 micrometers to 25 micrometers, and the thickness of the color conversion portion is smaller than the thickness of the light shielding layer.

12. The spliced ​​display device according to claim 1, wherein: A polarizer or a cover plate is disposed on a side of the packaging layer away from the carrier plate.

13. A display terminal, comprising a splicing display device, the splicing display device comprising: Loading plate; A plurality of display sub-panels are arranged on the carrier plate, wherein the display sub-panels include a substrate and a plurality of light-emitting units, wherein the light-emitting units are arranged on a side of the substrate away from the carrier plate, and a seam is formed between two adjacent substrates; An encapsulation layer is arranged on a side of the display sub-panel away from the carrier plate, and the encapsulation layer continuously covers the joints between the plurality of display sub-panels and the plurality of substrates; Wherein, an absolute value of a difference between a refractive index of the encapsulation layer and a refractive index of the substrate is less than or equal to 0.

1.

14. The display terminal according to claim 13, wherein: A filling part for filling the joint is arranged in the joint, the material of the filling part includes optical glue or light-shielding glue, and the encapsulation layer covers the filling part.

15. The display terminal according to claim 14, wherein: The filling part is an optical glue with a refractive index of 1.4 to 1.7, and the packaging layer and the filling part are made of the same material and are integrally formed.

16. The display terminal according to claim 14, wherein: The spliced ​​display device includes a light-shielding layer arranged on the side of the packaging layer close to the carrier board, the light-shielding layer continuously covers the multiple substrates and the splicing seam, and the material of the light-shielding layer is the same as the material of the filling part, both of which are light-shielding glue; wherein the light-shielding layer is provided with a plurality of openings, and the orthographic projection of the light-emitting unit on the light-shielding layer is located within the opening.

17. The display terminal according to claim 13, wherein: The ratio of the distance between two adjacent light-emitting units of the same color on both sides of the seam to the distance between two adjacent light-emitting units of the same color on any display sub-panel is 0.85 to 1.

15.

18. The display terminal according to claim 13, wherein: The light-emitting unit includes a monochromatic light-emitting chip, a color conversion layer is provided on a side of the packaging layer away from the carrier board, the color conversion layer includes a light-shielding layer and a plurality of color conversion parts embedded in the light-shielding layer; one color conversion part corresponds to one monochromatic light-emitting chip, and the color conversion part includes a first color conversion part, a second color conversion part, and a third color conversion part; The color conversion layer continuously covers the joints between the plurality of display sub-panels and the plurality of substrates, and the light shielding layer covers the joints between the plurality of substrates.

19. The display terminal according to claim 18, wherein: The spliced ​​display device also includes a filter layer, which is arranged on the side of the color conversion layer away from the substrate. The filter layer includes a first color filter portion, a second color filter portion, and a third color filter portion. The filter color of the first color filter portion is set corresponding to the first color conversion portion, the filter color of the second color filter portion is set corresponding to the second color conversion portion, and the filter color of the third color filter portion is set corresponding to the third color conversion portion.

20. The display terminal according to claim 18, wherein: The thickness of the light shielding layer ranges from 10 micrometers to 30 micrometers, the thickness of the color conversion portion ranges from 5 micrometers to 25 micrometers, and the thickness of the color conversion portion is smaller than the thickness of the light shielding layer.

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