Splicing display device and display terminal

Abstract

The invention discloses a tiled display device and a display terminal. The tiled display device comprises a bearing plate, a plurality of display daughter boards and a packaging layer, each display daughter board comprises a substrate and a plurality of light-emitting units, and a splicing seam is arranged between every two adjacent display daughter boards; the packaging layer is arranged on the side, deviating from the bearing plate, of the display sub-plates, and the packaging layer continuously covers the abutted seams between the multiple display sub-plates and the multiple substrates; the absolute value of the difference between the refractive index of the packaging layer and the refractive index of the substrate is smaller than or equal to 0.1. According to the display panel, the continuous packaging layers are arranged on the two adjacent display sub-panels, and the packaging layers cover the abutted seams, so that the absolute value of the difference value between the refractive index of the packaging layers and the refractive index of the substrate is smaller than or equal to 0.1, light rays are not refracted on the critical surfaces of the packaging layers and the substrate, or the difference between the refraction angle and the incident angle is small, and the display effect is improved. Therefore, the optical performance of the light at the abutted seam is close to that at other positions, and the visual discontinuity and the lighting effect difference of an image caused by the abutted seam are improved.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a tiled display device and a display terminal. Background Art

[0002] Micro-LED displays have attracted increasing attention due to their advantages of high color saturation, high contrast ratio, fast response speed, and high reliability, and have quickly become a new hot spot in display development.

[0003] Since it is difficult to produce large-sized Micro-LED display devices, usually, small and medium-sized Micro-LED display sub-boards are first fabricated, and then multiple display sub-boards are tiled into a larger-sized display device. The seam between two adjacent display sub-boards will cause a sense of visual discontinuity in the image of the tiled display device and a difference in light effects, affecting the display effect of the tiled display device.

[0004] Therefore, it is urgent to solve the above technical problems. Summary of the Invention

[0005] This application provides a tiled display device and a display terminal to improve the technical problems that the seam between two adjacent display sub-boards in the tiled display device causes a sense of visual discontinuity in the image and a difference in light effects, affecting the display effect.

[0006] To solve the above solution, the technical solutions provided in this application are as follows:

[0007] This application provides a tiled display device, and the tiled display device includes:

[0008] A carrier board;

[0009] Multiple display sub-boards, arranged on the carrier board, the display sub-board includes a substrate and multiple light-emitting units, the light-emitting units are arranged on a side of the substrate facing away from the carrier board, and there is a seam between two adjacent substrates;

[0010] An encapsulation layer, arranged on a side of the display sub-board facing away from the carrier board, the encapsulation layer continuously covers multiple display sub-boards and the seam between multiple substrates;

[0011] Wherein, 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.

[0012] In the tiled display device of this application, a filling part for filling the seam is arranged in the seam, the material of the filling part includes optical glue or light-shielding glue, and the encapsulation layer covers the filling part.

[0013] In the splicing display device of the present application, the filling part is an optical adhesive with a refractive index of 1.4 to 1.7. The encapsulation layer is made of the same material as the filling part and is integrally formed.

[0014] In the splicing display device of the present application, the splicing display device includes a light-shielding layer disposed on a side of the encapsulation layer close to the carrier plate. The light-shielding layer continuously covers a plurality of the substrates and the splicing seam. The material of the light-shielding layer is the same as that of the filling part, both being a light-shielding adhesive. Among them, 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 openings.

[0015] In the splicing display device of the present application, the ratio of the distance between two adjacent light-emitting units of the same color on both sides of the splicing seam to the distance between two adjacent light-emitting units of the same color on any display sub-board is 0.85 to 1.15.

[0016] In the splicing display device of the present application, the light-emitting unit includes a monochromatic light-emitting chip. A color conversion layer is disposed on a side of the encapsulation layer away from the carrier plate. 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. The color conversion part includes a first color conversion part, a second color conversion part, and a third color conversion part.

[0017] The color conversion layer continuously covers a plurality of the display sub-boards and the splicing seam between the plurality of substrates, and the light-shielding layer covers the splicing seam between the plurality of substrates.

[0018] In the splicing display device of the present application, the splicing display device further includes a filter layer. The filter layer is disposed on a side of the color conversion layer away from the substrate. The filter layer includes a first color filter part, a second color filter part, and a third color filter part. The filtering color of the first color filter part is correspondingly set with the first color conversion part, the filtering color of the second color filter part is correspondingly set with the second color conversion part, and the filtering color of the third color filter part is correspondingly set with the third color conversion part.

[0019] In the splicing display device of the present application, the thickness range of the light-shielding layer is 10 microns to 30 microns, the thickness of the color conversion part is 5 microns to 25 microns, and the thickness of the color conversion part is less than the thickness of the light-shielding layer.

[0020] In the splicing display device of the present application, a polarizer or a cover plate is disposed on a side surface of the encapsulation layer away from the carrier plate.

[0021] The present application further provides a display terminal, and the display terminal includes the above-mentioned splicing display device.

[0022] Beneficial effects: The present application discloses a splicing display device and a display terminal. The splicing display device includes a carrier board, a plurality of display sub-boards, and an encapsulation layer. The display sub-boards are disposed on the carrier board. The display sub-board includes a substrate and a plurality of light-emitting units. The light-emitting units are disposed on a side of the substrate facing away from the carrier board. There is a splicing seam between two adjacent display sub-boards. The encapsulation layer is disposed on a side of the display sub-board facing away from the carrier board. The encapsulation layer continuously covers the plurality of display sub-boards and the splicing seam between the plurality of substrates. Wherein, 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. By providing a continuous encapsulation layer on two adjacent display sub-boards, and the encapsulation layer covers the splicing seam, and 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, light does not refract at the interface between the encapsulation layer and the substrate or the refraction angle has a small difference from the incident angle. Thus, the optical performance of the light at the splicing seam is close to that at other positions, thereby improving the visual discontinuity of the image caused by the splicing seam and the light effect difference. Description of the Drawings

[0023] The following will combine the drawings and describe the specific embodiments of the present application in detail, making the technical solutions and other beneficial effects of the present application obvious.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of a splicing display device provided by an embodiment of the present application;

[0025] Figure 2 is Figure 1 a cross-sectional structural schematic diagram of the first splicing display device at A-A in

[0026] Figure 3 is Figure 1 a cross-sectional structural schematic diagram of the second splicing display device at A-A in

[0027] Figure 4 is Figure 1 a cross-sectional structural schematic diagram of the third splicing display device at A-A in

[0028] Figure 5 is Figure 1 a cross-sectional structural schematic diagram of the fourth splicing display device at A-A in

[0029] Figure 6 is Figure 1 a cross-sectional structural schematic diagram of the fifth splicing display device at A-A in

[0030] Description of the Reference Numerals:

[0031] Carrier plate 1, display sub-board 2, substrate 21, second surface 211, seam 20, light-emitting unit 22, first micro light-emitting diode 221, second micro light-emitting diode 222, third micro light-emitting diode 223, monochromatic light-emitting chip 22a, color conversion layer 22b, first color conversion part 221b, second color conversion part 222b, third color conversion part 223b, filter layer 22c, first color filter part 221c, second color filter part 222c, third color filter part 223c, filling part 3, first surface 31, encapsulation layer 4, light-shielding layer 5, opening 51, cover plate 6, first pitch S1, second pitch S2. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application. In addition, it should be understood that the specific implementation manners 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 orientation terms such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0033] As Figure 1 and Figure 2 shown, the present application discloses a tiled display device. The tiled display device includes a carrier plate 1, a plurality of display sub-boards 2, and an encapsulation layer 4. The display sub-boards 2 are disposed on the carrier plate 1. The display sub-boards 2 include a substrate 21 and a plurality of light-emitting units 22. The light-emitting units 22 are disposed on a side of the substrate 21 facing away from the carrier plate 1. There is a seam 20 between two adjacent display sub-boards 2. The encapsulation layer 4 is disposed on a side of the display sub-boards 2 facing away from the carrier plate 1. The encapsulation layer 4 continuously covers the plurality of display sub-boards 2 and the seam 20 between the plurality of substrates 21. Wherein, 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.

[0034] In this embodiment, the tiled display device can be a Micro-LED display device or the like.

[0035] In this embodiment, the carrier plate 1 is used to provide a bearing plane for the plurality of display sub-boards 2. The carrier plate 1 can be glass, a metal plate, etc. For example, the metal plate can be an aluminum plate. When using a metal plate as the carrier plate 1, it is beneficial to improve the heat dissipation performance of the tiled display device.

[0036] In this embodiment, the display daughter board 2 is disposed on the carrier board 1. The display daughter board 2 includes a substrate 21 and a light-emitting unit 22. A driving circuit is provided on the substrate 21, and the driving circuit is used to drive the light-emitting unit 22 to emit light. The substrate 21 may be glass or the like, but is not limited thereto.

[0037] The light-emitting unit 22 may be a micro light-emitting diode, a monochromatic light-emitting chip 22a, or the like, but is not limited thereto.

[0038] A seam 20 is provided between two adjacent display daughter boards 2. The seam 20 refers to the gap existing at the splicing portion of two adjacent display daughter boards 2. Due to the limitation of the manufacturing process precision of the substrate 21, the seam 20 cannot be eliminated. Since the refractive index of the air at the seam 20 is inconsistent with the refractive index of the display daughter board 2, the seam 20 will cause a sense of visual discontinuity of the image and a light effect difference, affecting the display effect of the splicing display device.

[0039] The material of the encapsulation layer 4 may be encapsulation glue or the like, and the material of the encapsulation glue may be silicone, acrylic resin, or the like. The encapsulation layer 4 is formed by a coating process and cured by ultraviolet light.

[0040] It should be noted that the encapsulation layer 4 is integrally provided, which means that the encapsulation layer 4 continuously covers a plurality of display daughter boards 2 and the seam 20. Through the above setting, the light effect difference at the seam 20 can be reduced.

[0041] In this embodiment, the material of the substrate 21 may be glass or the like. 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 range of the glass is 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.

[0042] Optionally, the encapsulation layer 4 includes a single-layer material or a multi-layer composite material, and the refractive index range of the encapsulation layer 4 is 1.4 to 1.7.

[0043] In some embodiments, the refractive index of the encapsulation layer 4 can be adjusted by incorporating high-refractive-index particles, and the materials of the high-refractive-index particles include titanium dioxide, zirconium oxide, and the like.

[0044] In this application, by providing a continuous encapsulation layer 4 on the display daughter board 2, the encapsulation layer 4 covering the seam 20, and making the refractive index of the encapsulation layer 4 match the refractive index of the substrate 21, the optical difference between the seam 20 and the substrate 21 is reduced, thereby improving the sense of visual discontinuity of the image and the light effect difference caused by the seam 20.

[0045] It should be noted that in order 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. Optionally, 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.

[0046] 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, light does not refract at the interface between the encapsulation layer 4 and the substrate 21 or the refraction angle has a small difference from the incident angle. As a result, the optical performance of 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.

[0047] In some embodiments, the light-emitting units 22 are uniformly arranged on the display sub-board 2. That is to say, in the same display sub-board 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-boards 2 is the same.

[0048] In two adjacent display sub-boards 2, the distance between two adjacent light-emitting units 22 of the same color located on both sides of the seam 20 is the second distance S2. The second distance S2 is close to the first distance S1. The range of the ratio S2 / S1 of the second distance S2 to the first distance S1 is from 0.85 to 1.15. Optionally, the range of the ratio of the second distance S2 to the first distance S1 is from 0.95 to 1.05. By making the ratio of the second distance S2 to the first distance S1 meet the above requirements, the distance between two adjacent light-emitting units 22 at the seam 20 can be made consistent with the distance between two adjacent light-emitting units 22 at other positions, further reducing the difference in the displayed image.

[0049] In the splicing display device of the present application, as Figure 2 shown, Figure 2 is a schematic cross-sectional structure diagram of the first splicing display device provided by the embodiment of the present application. A filling portion 3 for filling the seam 20 is disposed in the seam 20. The material of the filling portion 3 includes optical glue or light-shielding glue, and the encapsulation layer 4 covers the filling portion 3.

[0050] In this embodiment, the material of the substrate 21 can be glass, etc., and the material of the filling portion 3 can be resin, etc. It should be understood that the refractive index of the material of the filling portion 3 is close to the refractive index of the substrate 21, thereby reducing the light effect difference at the seam 20. For example, when the material of the substrate 21 is glass, the refractive index of the 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.

[0051] 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.

[0052] In this embodiment, the surface of the substrate 21 close to the carrier plate 1 is the lower surface, the 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 plurality of side surfaces connecting the second surface 211 and the lower surface of the substrate 21. The surface of the filling portion 3 facing away from the carrier plate 1 is the first surface 31, the 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 plurality of side surfaces connecting the first surface 31 and the lower surface of the filling portion 3.

[0053] The filling portion 3 is filled in the seam 20, and the peripheral side of the filling portion 3 abuts against the peripheral side of the substrate 21.

[0054] 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.

[0055] In this embodiment, the splicing display device further includes a cover plate 6, and the cover plate 6 is disposed on the side of the display sub-board 2 facing away from the carrier plate 1. The cover plate 6 can be made of materials such as glass, polyimide, polyethylene terephthalate, etc., but is not limited thereto. The cover plate 6 can protect the light-emitting unit 22 from being damaged by moisture and oxygen.

[0056] In this embodiment, as Figure 2 shown, the filling portion 3 is filled in the seam 20, and the encapsulation layer 4 covers the plurality of display sub-boards 2 and the filling portion 3.

[0057] Specifically, the filling portion 3 can be an optical glue. For example, the optical glue can be acrylic resin, epoxy resin, etc. The optical glue can be formed in the seam 20 by processes such as inkjet printing or scraping, and then formed after curing.

[0058] In this embodiment, the cover plate 6 can be covered on the encapsulation layer 4, and the cover plate 6 can protect the light-emitting unit 22 from being damaged by moisture and oxygen.

[0059] In the splicing display device of the present application, as Figure 3 shown, Figure 3 is a schematic cross-sectional structure diagram of the second splicing display device provided by the embodiment of the present application. The difference between the second splicing display device and the first splicing display device is that the encapsulation layer 4 and the filling portion 3 are made of the same material, and the encapsulation layer 4 and the filling portion 3 are integrally formed.

[0060] Different from the first splicing display device, in this embodiment, encapsulation glue is coated on the plurality of display sub-boards 2, and the encapsulation glue is filled in the seam 20. The encapsulation glue is cured by ultraviolet light to form a filling portion 3 and an encapsulation layer 4. Through the above settings, the process can be simplified. At the same time, the encapsulation glue and the filling portion 3 are made of the same material, and the overall consistency is better.

[0061] In this embodiment, the cover plate 6 can cover the encapsulation layer 4, and the cover plate 6 can protect the light-emitting unit 22 from being damaged by water vapor and oxygen.

[0062] In the splicing display device of the present application, as Figure 4 shown, Figure 4 FIG. 3 is a schematic cross-sectional structure diagram of a third splicing display device provided by an embodiment of the present application. The difference between the third splicing display device and the first splicing display device is that the third splicing display device further includes a light-shielding layer 5. The light-shielding layer 5 is disposed on a side of the display sub-board 2 away from the carrier board 1. The light-shielding layer 5 is provided with a plurality of openings, and the orthographic projection of the light-emitting unit 22 on the light-shielding layer 5 is located within the openings. The light-shielding layer 5 continuously covers a plurality of the display sub-boards 2.

[0063] In this embodiment, the light-shielding layer 5 includes a first light-shielding sub-layer and a second light-shielding sub-layer arranged in the same layer. The first light-shielding sub-layer can be formed on the display sub-board 2 by processes such as coating, exposure, development, and post-baking. The first light-shielding sub-layer includes a plurality of openings, and the light-emitting units 22 can be transferred in a large amount onto the display sub-board 2. The orthographic projection of the light-emitting unit 22 on the first light-shielding sub-layer is located within the openings.

[0064] The second light-shielding sub-layer can be formed by processes such as inkjet printing or scraping. The second light-shielding sub-layer covers the filling portion 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 board 1 is flush with the surface of the first light-shielding sub-layer facing away from the carrier board 1, so that the light-shielding layer 5 forms a flat upper surface.

[0065] In this embodiment, the first light-shielding sub-layer and the second light-shielding sub-layer can be made of the same material. The material of the light-shielding layer 5 can be a black resin material or other light-absorbing materials. The light-shielding layer 5 can block the seam 20 and reduce the visibility of the seam 20, thereby improving the visual discontinuity of the image caused by the seam 20 and the light effect difference.

[0066] In this embodiment, the encapsulation layer 4 covers the light-shielding layer 5.

[0067] In some embodiments, the filling portion 3 can be made of the same material as the second light-shielding sub-layer, and the filling portion 3 can be formed together with the second light-shielding sub-layer, thereby simplifying the manufacturing process of the splicing display device.

[0068] In the splicing display device of the present application, as Figures 2 to 4 shown, the light-emitting unit 22 includes a first micro light-emitting diode 221, a second micro light-emitting diode 222, and a third micro light-emitting diode 223 with different colors.

[0069] In this embodiment, the first micro light-emitting diode 221 can be a red micro light-emitting diode for emitting red light. The second micro light-emitting diode 222 can be a green micro light-emitting diode for emitting green light. The third micro light-emitting diode 223 can be a blue micro light-emitting diode for emitting blue light.

[0070] The light-emitting unit 22 can be transferred onto the substrate 21 by using a mass transfer technology and connected to the driving circuit on the substrate 21.

[0071] In the splicing display device of the present application, as Figure 5 shown, Figure 5 FIG. 4 is a schematic cross-sectional structure diagram of a fourth splicing display device provided by an embodiment of the present application. The difference between the fourth splicing display device and the first splicing display device is that the light-emitting unit 22 is a monochromatic light-emitting chip 22a. The splicing display device includes a color conversion layer 22b, the color conversion layer 22b is disposed on a side of the monochromatic light-emitting chip 22a facing away from the substrate 21, and the color conversion layer 22b includes a light-shielding layer 5 and a plurality of color conversion portions embedded in the light-shielding layer 5; one color conversion portion corresponds to one monochromatic light-emitting chip 22a, and the color conversion portion includes a first color conversion portion 221b, a second color conversion portion 222b, and a third color conversion portion 223b.

[0072] In this embodiment, the light-emitting unit 22 is a monochromatic light-emitting chip 22a, and the monochromatic light-emitting chip 22a can be a blue micro LED or a UV micro LED.

[0073] In this embodiment, the monochromatic light-emitting chip 22a can emit blue light. The color conversion portion can be a quantum dot material. The blue light emitted by the monochromatic light-emitting chip 22a can excite quantum dot materials of different colors to emit different colors of light. Since the monochromatic light-emitting chip 22a can be directly fabricated on a sapphire substrate, therefore, it is not necessary to use a mass transfer technology to transfer the monochromatic light-emitting chip 22a, which simplifies the manufacturing process and improves the production yield.

[0074] Furthermore, the epitaxial structures and material systems of red micro light-emitting diodes, green micro light-emitting diodes, and blue micro light-emitting diodes are different, and their driving voltages and attenuation trends of photoelectric conversion efficiency are also different. Therefore, visual color differences are likely to occur during display. In this embodiment, a quantum dot color conversion technology is adopted. The quantum dot material has the advantages of adjustable wavelength, high color purity, high quantum yield, and low cost, and can reduce visual color differences.

[0075] In this embodiment, the color conversion unit includes a first color conversion unit 221b, a second color conversion unit 222b, and a third color conversion unit 223b. The first color conversion unit 221b can be a red quantum dot unit, the second color conversion unit 222b can be a green quantum dot unit, and the third color conversion unit 223b can be a transparent layer.

[0076] The blue micro-LED excites the first color conversion unit 221b to form red light, the blue micro-LED excites the second color conversion unit 222b to form green light, and the blue light emitted by the blue micro-LED is emitted through the third color conversion unit 223b.

[0077] In this embodiment, the encapsulation layer 4 can not only protect the monochromatic light-emitting chip 22a, but also separate the color conversion unit from the monochromatic light-emitting chip 22a, preventing the heat of the monochromatic 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 tiled display device.

[0078] Further, the color conversion layer 22b includes a light-shielding layer 5. The light-shielding layer 5 is provided with a plurality of openings, and the first color conversion unit 221b, the second color conversion unit 222b, and the third color conversion unit 223b are disposed in the openings. The light-shielding layer 5 covers the filling portion 3 between two adjacent display sub-boards 2.

[0079] The material of the light-shielding layer 5 can be a black resin material or other light-absorbing materials. By providing the light-shielding layer 5, color crosstalk between the same light-emitting units 22 can be prevented. At the same time, the light-shielding layer 5 covers the filling portion 3, and can absorb the large-angle blue light emitted from the side walls of the monochromatic light-emitting chips 22a near the seam 20, further eliminating the influence of the seam 20 on the display effect.

[0080] In this embodiment, the light-shielding layer 5 can be fabricated by processes such as coating, exposure, development, and post-baking. After fabrication, the light-shielding layer 5 includes a plurality of openings. The first color conversion unit 221b, the second color conversion unit 222b, and the third color conversion unit 223b are fabricated in the openings by processes such as coating, exposure, development, and post-baking or by inkjet printing.

[0081] It should be noted that the openings are disposed in alignment with the monochromatic light-emitting chips 22a, and the orthographic projection of the monochromatic light-emitting chips 22a on the color conversion layer 22b is located within the openings.

[0082] In this embodiment, the thickness of the light-shielding layer 5 is greater than or equal to 10 microns and less than or equal to 30 microns.

[0083] In this embodiment, the thicknesses of the first color conversion part 221b, the second color conversion part 222b, and the third color conversion part 223b are all greater than or equal to 5 micrometers and less than or equal to 25 micrometers.

[0084] In this embodiment, the tiled display device further includes a cover plate 6, which is disposed on the side of the color conversion layer 22b away from the substrate 21. The cover plate 6 can be made of materials such as glass, polyimide, polyethylene terephthalate, etc., but is not limited thereto. The cover plate 6 can protect the quantum dot material from being damaged by moisture and oxygen.

[0085] In the tiled display device of the present application, as Figure 6 shown, Figure 6 FIG. 5 is a schematic cross-sectional structure diagram of the fifth tiled display device provided by the embodiment of the present application. The difference between the fifth tiled display device and the fourth tiled display device is that the fifth tiled display device further includes a color filter layer 22c.

[0086] The tiled display device includes a color filter layer 22c, which is disposed on the side of the color conversion layer 22b away from the substrate 21. The color filter layer 22c includes a first color filter part 221c, a second color filter part 222c, and a third color filter part 223c. The first color filter part 221c is correspondingly disposed with the first color conversion part 221b, the second color filter part 222c is correspondingly disposed with the second color conversion part 222b, and the third color filter part 223c is correspondingly disposed with the third color conversion part 223b.

[0087] In this embodiment, the color filter layer 22c can be fabricated by methods such as coating, exposure, development, and post-baking. The first color filter part 221c can be a red color filter part, and the first color conversion part 221b can be a red light quantum dot part. The orthographic projection of the first color filter part 221c on the display surface at least partially overlaps with the orthographic projection of the first color conversion part 221b on the display surface.

[0088] The second color filter part 222c can be a green color filter part, and the second color conversion part 222b can be a green light quantum dot part. The orthographic projection of the second color filter part 222c on the display surface at least partially overlaps with the orthographic projection of the second color conversion part 222b on the display surface.

[0089] The third color filter part 223c can be a blue color filter part, and the third color conversion part 223b can be a transparent layer. The orthographic projection of the third color filter part 223c on the display surface at least partially overlaps with the orthographic projection of the third color conversion part 223b on the display surface.

[0090] Since some of the light formed after the monochromatic light-emitting chip 22a excites the quantum dot material still remains unexcited by the quantum dot material and retains its original color, this will result in impure emission colors. Therefore, a red light filter is provided above the red quantum dot section, and the red light filter can filter out the blue light that is not excited by the quantum dot material, thereby making the red light purer. Similarly, setting a green light filter can make the green light purer, and setting a blue light filter can make the blue light purer.

[0091] This application also provides a display terminal, and the display terminal includes the above-mentioned splicing display device.

[0092] In this embodiment, the mobile terminal may be: a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, or any other product or component with a display function.

[0093] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0094] The above has introduced in detail a splicing display device and a display terminal provided by the embodiments of this application. Specific examples are used herein to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the technical solution and its core idea of this application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and 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 this application.

Claims

1. A splicing display device, characterized in that, include: 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 splicing display device according to claim 1, characterized in that, 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, characterized in that, The filling part is an optical glue with a refractive index of 1.4 to 1.

7. The packaging layer and the filling part are made of the same material and are integrally formed.

4. The splicing display device according to claim 2, characterized in that, 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.

5. The splicing display device according to claim 1, characterized in that, 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.

6. The splicing display device according to claim 1, characterized in that, 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.

7. The splicing display device according to claim 6, characterized in that, 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.

8. The splicing display device according to claim 6, characterized in that, 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.

9. The splicing display device according to claim 1, characterized in that, A polarizer or a cover plate is disposed on a side of the packaging layer away from the carrier plate.

10. A display terminal, characterized in that, The display terminal comprises the splicing display device according to any one of claims 1 to 9.

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