Tiled display module and display device

Abstract

A tiled display module and a display device. The tiled display module may comprise a main display panel (1) and a light-emitting panel (2), wherein the main display panel (1) comprises at least two sub-display panels (11), each sub-display panel (11) comprising a plurality of light-emitting portions (1111), and a tiled non-display area (PFA) being provided between two adjacent sub-display panels (11); the main display panel (1) has a display surface; the light-emitting panel (2) is arranged on the side of the display surface facing away from the main display panel (1); and the orthographic projection of the light-emitting panel (2) on a first reference plane at least overlaps with the orthographic projection of a tiled non-display area (PFA) on the first reference plane, with the first reference plane being parallel to the display surface. The tiled display module has a seam-free display effect when displaying images.

Description

Spliced ​​display module and display device

[0001] Cross-references

[0002] This disclosure claims priority to Chinese patent application number 202410389536.0, filed on April 1, 2024, entitled “Splicing display module and display device,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of display technology, and in particular to a spliced ​​display module and a display device. Background Art

[0004] To achieve a larger display area, the application of splicing multiple display panels together is becoming increasingly widespread. The size and visual quality of the splicing seam between spliced ​​display modules are currently the main competitive points in the market. Therefore, reducing the physical and visual splicing seam is the primary technical issue to be solved.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0006] The purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art and provide a spliced ​​display module and a display device.

[0007] According to one aspect of the present disclosure, a spliced ​​display module is provided, comprising:

[0008] A main display panel, comprising at least two sub-display panels, wherein the sub-display panels include a plurality of light-emitting portions, a splicing non-display area is provided between two adjacent sub-display panels, and the main display panel has a display surface;

[0009] A light-emitting panel is provided on a side of the display surface facing away from the main display panel, the orthographic projection of the light-emitting panel on a first reference plane at least overlaps with the orthographic projection of the spliced ​​non-display area on the first reference plane, and the first reference plane is parallel to the display surface.

[0010] In an exemplary embodiment of the present disclosure, the display device further includes:

[0011] A cover plate is provided on the light-emitting side of the main display panel and the light-emitting panel, the cover plate having a first surface and a second surface arranged opposite to each other, the second surface being closer to the main display panel than the first surface, the second surface being provided with a groove, the orthographic projection of the groove on the first reference plane overlapping with the orthographic projection of the light-emitting panel on the first reference plane, a light-adjusting structure being provided on the side wall of the groove, the light-adjusting structure being used to refract a portion of the light from the sub-display panel and a portion of the light from the light-emitting panel to a dark band and emit them.

[0012] In an exemplary embodiment of the present disclosure, the light adjustment structure is a convex lens or a Fresnel lens.

[0013] In an exemplary embodiment of the present disclosure, the groove sidewall includes a first portion, the distance between the first portion and the light-emitting panel in a first direction is a first distance, the distance between the first portion and the sub-display panel in a second direction is a second distance, the first distance decreases as the second distance increases, the light adjustment structure is provided in the first portion, the first direction is parallel to the display surface, and the second direction is perpendicular to the display surface.

[0014] In an exemplary embodiment of the present disclosure, the groove sidewall of the groove further includes a second portion, the second portion is connected to the first portion and is closer to the main display panel than the first portion, and the second portion is perpendicular to the main display panel.

[0015] In an exemplary embodiment of the present disclosure, the height M of the second part in the second direction satisfies the relationship: M≤D*tan(90°-a), wherein D is the maximum distance between the light adjustment structure and the side of the light-emitting panel, and a is the maximum light-emitting angle of the light-emitting panel.

[0016] In an exemplary embodiment of the present disclosure, the bottom wall of the groove is set to be a plane parallel to the display surface.

[0017] In an exemplary embodiment of the present disclosure, the maximum distance D between the light adjustment structure and the side of the light-emitting panel and the maximum width H of the dark band satisfy the relationship: D≥H / 2; the width L of the light-emitting panel and the maximum width H of the dark band satisfy the relationship: L≥H.

[0018] In an exemplary embodiment of the present disclosure, a maximum distance D between the light adjustment structure and a side surface of the light-emitting board is greater than or equal to 0.35 mm and less than or equal to 0.45 mm.

[0019] In an exemplary embodiment of the present disclosure, an angle b between the first portion of the groove sidewall and the display surface of the main display panel is greater than or equal to 0.4a and less than or equal to 0.6a, where a is the maximum luminous angle of the light-emitting panel.

[0020] In an exemplary embodiment of the present disclosure, the remaining thickness of the cover plate at the groove is greater than or equal to 4 mm and less than or equal to 6 mm.

[0021] In an exemplary embodiment of the present disclosure, a ratio of a color gamut value of the sub-display panel to a color gamut value of the light-emitting panel is greater than or equal to 0.95 and less than or equal to 1.05.

[0022] In an exemplary embodiment of the present disclosure, the sub-display panel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel, the light-emitting panel includes a fourth sub-pixel, a fifth sub-pixel, and a sixth sub-pixel, an absolute value of a difference between a center wavelength of the first sub-pixel and a center wavelength of the fourth sub-pixel is less than or equal to 2 nanometers, an absolute value of a difference between a center wavelength of the second sub-pixel and a center wavelength of the fifth sub-pixel is less than or equal to 2 nanometers, and an absolute value of a difference between a center wavelength of the third sub-pixel and a center wavelength of the sixth sub-pixel is less than or equal to 2 nanometers;

[0023] Alternatively, the light-emitting panel includes a plurality of light-emitting devices and a first light-excitation portion, a second light-excitation portion, and a third light-excitation portion provided on the light-emitting side of the light-emitting device, wherein the material of the first light-excitation portion is divalent europium strontium titanate salt or trivalent europium ion silicate, the material of the second light-excitation portion is trivalent erbium ion silicate, and the material of the third light-excitation portion is divalent manganese strontium titanate salt;

[0024] Alternatively, the sub-display panel includes a first filter portion, a second filter portion, and a third filter portion, and the light-emitting panel includes a first filter layer, a second filter layer, and a third filter layer. The absolute value of the difference between the center wavelength of light that can be transmitted by the first filter portion and the center wavelength of light that can be transmitted by the first filter layer is less than or equal to 2 nanometers, the absolute value of the difference between the center wavelength of light that can be transmitted by the second filter portion and the center wavelength of light that can be transmitted by the second filter layer is less than or equal to 2 nanometers, and the absolute value of the difference between the center wavelength of light that can be transmitted by the third filter portion and the center wavelength of light that can be transmitted by the third filter layer is less than or equal to 2 nanometers.

[0025] In an exemplary embodiment of the present disclosure, the orthographic projection of the light-emitting panel on the main display panel overlaps with two adjacent sub-display panels and covers at least two columns of sub-pixels of each sub-display panel.

[0026] In an exemplary embodiment of the present disclosure, the sub-display panel is a liquid crystal display panel, and the light-emitting panel is a Mini LED light-emitting panel or a Micro LED light-emitting panel.

[0027] In an exemplary embodiment of the present disclosure, a gap is provided between two adjacent sub-display panels, and the display device further includes:

[0028] A bracket is arranged in the gap, and is used to support the light-emitting board and provide a heat dissipation channel for the light-emitting board.

[0029] In an exemplary embodiment of the present disclosure, the light-emitting panel includes:

[0030] The routing layer includes multiple connecting routing lines;

[0031] A base layer is provided on one side of the wiring layer, and a plurality of vias connected to the connection wirings are provided on the base layer;

[0032] a shielding layer, provided on a side of the base layer away from the routing layer, the shielding layer being provided with a plurality of openings;

[0033] A plurality of light-emitting devices are disposed in the plurality of openings in a one-to-one correspondence, and the light-emitting devices are electrically connected to the connection traces through the via holes;

[0034] The protective layer is arranged on a side of the shielding layer away from the base layer.

[0035] In an exemplary embodiment of the present disclosure, the plurality of light-emitting devices include a first light-emitting device, a second light-emitting device, and a third light-emitting device, and the first light-emitting device, the second light-emitting device, and the third light-emitting device emit light of different colors or the same white color;

[0036] Alternatively, the plurality of light-emitting devices are blue light-emitting devices or ultraviolet light-emitting devices, and the light-emitting panel further comprises a plurality of light excitation portions, which are arranged one-to-one on the light-emitting sides of the plurality of light-emitting devices, and the plurality of light excitation portions comprise a first light excitation portion, a second light excitation portion and a third light excitation portion.

[0037] In an exemplary embodiment of the present disclosure, the light-emitting panel may further include:

[0038] The plurality of filter layers are arranged on the light-emitting sides of the plurality of light-emitting devices in a one-to-one correspondence, or are arranged on the light-emitting sides of the plurality of light-excitation parts in a one-to-one correspondence.

[0039] In an exemplary embodiment of the present disclosure, the pixel arrangement structure of the sub-display panel is the same as the pixel arrangement structure of the light-emitting panel, and the ratio of the pixel density of the sub-display panel to the pixel density of the light-emitting panel is greater than or equal to 0.95 and less than or equal to 1.05.

[0040] According to another aspect of the present disclosure, a display device is provided, comprising any one of the display modules described above.

[0041] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0043] FIG1 is a schematic structural diagram of an exemplary embodiment of a spliced ​​display module disclosed herein.

[0044] FIG. 2 is a schematic structural diagram of an exemplary embodiment of the sub-display panel in FIG. 1 .

[0045] FIG3 is a schematic cross-sectional view of the spliced ​​display module in FIG1 .

[0046] FIG4 is a partial enlarged schematic diagram of the portion indicated by N in FIG3 .

[0047] FIG. 5 is a brightness curve of edge sub-pixels of the sub-display panel in FIG. 1 .

[0048] FIG6 is a schematic structural diagram of an exemplary embodiment of the light-emitting panel in FIG1 .

[0049] FIG. 7 is a schematic structural diagram of another exemplary embodiment of the light-emitting panel in FIG. 1 .

[0050] FIG8 is a schematic structural diagram of another exemplary embodiment of the spliced ​​display module disclosed herein.

[0051] 9-11 are schematic diagrams showing the optical path principle of the spliced ​​display module of the present disclosure in generating dark bands.

[0052] FIG12 is a structural diagram of another exemplary embodiment of the spliced ​​display module disclosed herein.

[0053] FIG13 is a partial enlarged schematic diagram of the portion indicated by W1 in FIG12 .

[0054] FIG14 is a structural diagram of yet another exemplary embodiment of the spliced ​​display module disclosed herein.

[0055] FIG15 is a partial enlarged schematic diagram of the portion indicated by W2 in FIG14 .

[0056] FIG. 16 is a schematic diagram illustrating the dimensions of the spliced ​​display module in FIG. 12 .

[0057] FIG17 is a schematic diagram of the dark band elimination effect simulated by software at a front view, a 30° viewing angle, and a 60° viewing angle when the angle b between the first part of the spliced ​​display module disclosed herein and the display surface of the main display panel is 10°, 30°, 50°, and 60°.

[0058] FIG18 is a schematic diagram of the dark band elimination effect simulated by software in the spliced ​​display module of the present disclosure at a viewing angle of 60° when the maximum distance D between the light adjustment structure and the side of the light-emitting panel is 0.1 mm, 0.2 mm, 0.3 mm, and 0.4 mm.

[0059] FIG. 19 is a schematic diagram of spectrums of sub-pixels of different colors in the sub-display panel 11 in FIG. 1 .

[0060] Explanation of Reference Numerals: 1, main display panel; 11, sub-display panel; 111, backlight module; 1111, light-emitting unit; 112, array substrate; 113, liquid crystal layer; 114, color filter substrate; 1141, filter unit; 1141a, first filter unit; 1141b, second filter unit; 1141c, third filter unit; 11a, first sub-pixel; 11b, second sub-pixel; 11c, third sub-pixel; 2. Light-emitting board; 21. Routing layer; 22. Base layer; 23. Shielding layer; 24. Light-emitting device; 24a. First light-emitting device; 24b. Second light-emitting device; 24c. Third light-emitting device; 25. Light-exciting portion; 25a. First light-exciting portion; 25b. Second light-exciting portion; 25c. Third light-exciting portion; 26. Filter layer; 26a. First filter layer; 26b. Second filter layer; 26c. Third filter layer; 27. Protective layer; 28. Connecting wire; 29. ​​Connector; 2a. Fourth sub-pixel; 2b. Fifth sub-pixel; 2c. Sixth sub-pixel; 3. Cover plate; 31. First surface; 32. Second surface; 33. Groove; 331. Groove bottom wall; 332. Groove side wall; 3321. First portion; 3322. Second portion; 34. Light adjustment structure; 4. Front frame; 5. Bracket; AA, display area; FA, non-display area; PFA, spliced ​​non-display area; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0061] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0062] Although relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via the other structure.

[0063] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.

[0064] An example embodiment of the present disclosure provides a spliced ​​display module, as shown in Figures 1 to 19, the spliced ​​display module may include a main display panel 1 and a light-emitting panel 2; the main display panel 1 may include at least two sub-display panels 11, the sub-display panel 11 may include a plurality of light-emitting portions 1111, a spliced ​​non-display area PFA is provided between two adjacent sub-display panels 11, and the main display panel 1 has a display surface; the light-emitting panel 2 is provided on a side of the display surface facing away from the main display panel 1, and the orthographic projection of the light-emitting panel 2 on a first reference plane at least overlaps with the orthographic projection of the spliced ​​non-display area PFA on the first reference plane, and the first reference plane is parallel to the display surface.

[0065] The spliced ​​display module disclosed herein can at least shield the spliced ​​non-display area PFA through the light-emitting panel 2, so that the spliced ​​display module has a seamless display effect when displaying images.

[0066] In this example embodiment, referring to FIG1 , the main display panel 1 may include at least two sub-display panels 11. For example, the main display panel 1 may include two sub-display panels 11. The main display panel 1 may also include three or more sub-display panels 11. The number of sub-display panels 11 may be determined based on specific display requirements and will not be described one by one here.

[0067] At least two sub-display panels 11 are spliced ​​together to form the main display panel 1, so that the main display panel 1 has a larger display surface.

[0068] A spliced ​​non-display area PFA is provided between two adjacent sub-display panels 11. Sub-display panels 11 include a display area AA and a non-display area FA surrounding the display area AA. Due to current design and manufacturing limitations of sub-display panels 11, the non-display area FA cannot be eliminated. The width K1 of the non-display area FA is greater than or equal to 0.44 mm and less than or equal to 2.2 mm. For example, the width K1 of the non-display area FA can be 0.5 mm, 0.7 mm, 1 mm, 1.2 mm, 1.5 mm, 1.7 mm, and so on.

[0069] The spliced ​​non-display area PFA may include the non-display areas FA of two adjacent sub-display panels 11 and the width K2 of the gap between the two adjacent sub-display panels 11, such that the width K3 of the spliced ​​non-display area PFA = 2*K1+K2. When the width K2 of the gap between the two adjacent sub-display panels 11 is zero, the width K3 of the spliced ​​non-display area PFA = 2*K1. Of course, if the widths of the non-display areas FA of two adjacent sub-display panels 11 are different, the width K3 of the spliced ​​non-display area PFA is the sum of the widths of the non-display areas FA of the two sub-display panels 11.

[0070] It should be noted that the width refers to the dimension in a direction perpendicular to the extending direction of the gap between two adjacent sub-display panels 11 .

[0071] To facilitate splicing, the sub-display panel 11 is typically configured as a rectangular display panel. Therefore, the splicing non-display area PFA is typically in the shape of a long, straight line. Of course, in some exemplary embodiments, the sub-display panel 11 may also be in the shape of other polygons, such as a trapezoid, parallelogram, rhombus, triangle, pentagon, hexagon, or other multi-sided structures. In this case, the splicing non-display area PFA is also in the shape of a long, straight line, albeit at an angle. The edges of the sub-display panel 11 may also be curved, in which case the splicing non-display area PFA is curved.

[0072] In this exemplary embodiment, as shown in FIG2 , the sub-display panel 11 may be a liquid crystal display panel. The sub-display panel 11 may include a backlight module 111, an array substrate 112, a liquid crystal layer 113, and a color filter substrate 114. The array substrate 112 is disposed on one side of the backlight module 111, the liquid crystal layer 113 is disposed on a side of the array substrate 112 facing away from the backlight module 111, and the color filter substrate 114 is disposed on a side of the liquid crystal layer 113 facing away from the backlight module 111. The backlight module 111 may include multiple light-emitting units 1111. Of course, the sub-display panel 11 may also be a side-backlit liquid crystal display panel, i.e., multiple light-emitting units 1111 are disposed on the side of the light guide plate.

[0073] The color filter substrate 114 may include multiple filter sections 1141 and a black matrix. The black matrix is ​​provided with a multi-porous opening, and the multiple filter sections 1141 are arranged in a one-to-one correspondence within the opening. The multiple filter sections 1141 may include a first filter section 1141a, a second filter section 1141b, and a third filter section 1141c. The first filter section 1141a may be a red filter section, i.e., the first filter section 1141a only passes red light. The second filter section 1141b may be a green filter section, i.e., the second filter section 1141b only passes green light. The third filter section 1141c may be a blue filter section, i.e., the third filter section 1141c only passes blue light. A filter section 1141 forms a sub-pixel of the sub-display panel 11. For example, a first filter section 1141a forms a first sub-pixel 11a, a second filter section 1141b forms a second sub-pixel 11b, and a third filter section 1141c forms a third sub-pixel 11c. The first sub-pixel 11a can be a red sub-pixel, that is, the first sub-pixel 11a can emit red light; the second sub-pixel 11b can be a green sub-pixel, that is, the second sub-pixel 11b can emit green light; and the third sub-pixel 11c can be a blue sub-pixel, that is, the third sub-pixel 11c can emit blue light. Of course, the multiple filter sections 1141 can also include a fourth filter section, which can be a white filter section, that is, the fourth filter section can pass white light.

[0074] Of course, in some other example embodiments of the present disclosure, the sub-display panel 11 can be an OLED (Organic Electroluminescence Display) display panel, a QLED (Quantum Dot Light Emitting Diodes) display panel, a Mini LED (Mini-Light-Emitting Diode) display panel or a Micro LED (Micro-Light-Emitting Diode) display panel, etc.

[0075] 1 , 3 , and 4 , the light-emitting panel 2 is disposed on a side of the display surface facing away from the main display panel 1, that is, the light-emitting panel 2 is disposed on the light-emitting side of the main display panel 1; the orthographic projection of the light-emitting panel 2 on the first reference plane at least overlaps with the orthographic projection of the spliced ​​non-display area PFA on the first reference plane. For example, the orthographic projection of the light-emitting panel 2 on the first reference plane may cover and be larger than the orthographic projection of the spliced ​​non-display area PFA on the first reference plane, or the edge line of the orthographic projection of the light-emitting panel 2 on the first reference plane may coincide with the edge line of the orthographic projection of the spliced ​​non-display area PFA on the first reference plane. In both cases, the orthographic projection of the light-emitting panel 2 on the first reference plane completely covers the orthographic projection of the spliced ​​non-display area PFA on the first reference plane. Therefore, the shape of the light-emitting panel 2 may be the same as that of the spliced ​​non-display area PFA. For example, when the spliced ​​non-display area PFA is configured as a long straight line, the light-emitting panel 2 is also configured as a long straight line. When the spliced ​​non-display area PFA is configured as a curved shape, the light-emitting panel 2 may be configured as either a curved shape or a straight shape.

[0076] Of course, in some other exemplary embodiments of the present disclosure, a portion of the orthographic projection of the light-emitting panel 2 on the first reference plane may overlap with a portion of the orthographic projection of the spliced ​​non-display area PFA on the first reference plane.

[0077] The light-emitting panel 2 can at least shield the splicing non-display area PFA, so that the splicing display module has a seamless display effect when displaying images.

[0078] It should be noted that, in the present disclosure, the first reference plane is parallel to the display surface.

[0079] Specifically, due to the serious attenuation of the brightness of the sub-pixels at the edge of the sub-display panel 11, the human eye visual seam after splicing is large; when the relative brightness is lower than 85%, the human eye can perceive the dimming; referring to the brightness curve of the sub-pixels at the edge of the sub-display panel 11 shown in Figure 5, it can be obtained that 2-3 sub-pixels at the edge of the sub-display panel 11 are dark. Therefore, the orthographic projection of the light-emitting panel 2 on the main display panel 1 overlaps with the two adjacent sub-display panels 11 and covers at least two columns of sub-pixels of each sub-display panel 11. For example, the orthographic projection of the light-emitting panel 2 on the main display panel 1 can cover two columns of sub-pixels of each sub-display panel 11; moreover, when displaying, the two columns of sub-pixels at the edge of the light-emitting panel 2 and the two columns of sub-pixels at the edge of the sub-display panel 11 are controlled to display the same picture to ensure that the final display effect is normal.

[0080] Of course, in some other example embodiments of the present disclosure, the sub-display panel 11 may have 3-4 or more sub-pixels at the edges that are dark. In this case, the positive projection of the light-emitting panel 2 on the main display panel 1 may cover three, four or more columns of sub-pixels of each sub-display panel 11.

[0081] It should be noted that the column refers to the extending direction along the gap between two adjacent sub-display panels 11 .

[0082] In this exemplary embodiment, the light-emitting board 2 may be a Mini-LED (Mini-Light-Emitting Diode) light-emitting board 2 or a Micro-LED (Micro-Light-Emitting Diode) light-emitting board 2 or the like.

[0083] The following description will be made by taking the light-emitting panel 2 as a Mini LED light-emitting panel 2 as an example.

[0084] As shown in Figure 6 , the light-emitting panel 2 may include a wiring layer 21, a base layer 22, a shielding layer 23, a protective layer 27, and a plurality of light-emitting devices 24. The wiring layer 21 may include a plurality of connecting wirings and may be a flexible printed circuit board (FPC). Alternatively, the wiring layer 21 may be a conductive layer disposed on a substrate. The base layer 22 is disposed on one side of the wiring layer 21 and is provided with a plurality of vias connected to the connecting wirings.

[0085] A shielding layer 23 is provided on the side of the base layer 22 facing away from the wiring layer 21. The shielding layer 23 is provided with multiple openings, which are through-holes extending through the shielding layer 23. The thickness of the base layer 22 should be less than 0.4 mm to minimize the height difference between the light-emitting board 2 and the main display panel 1. The spacing between adjacent openings is approximately 0.05 mm. The shielding layer 23 is generally less than 0.2 mm thick, and the diameter of the openings is approximately 0.2 mm. Multiple light-emitting devices 24 are disposed within the openings in a one-to-one correspondence, with one light-emitting device 24 disposed within each opening. Each light-emitting device 24 is electrically connected to the connecting wiring via vias. Figures 6 and 7 illustrate that both the positive and negative electrodes of the light-emitting devices 24 are connected to the wiring layer 21, with the positive electrode of the light-emitting device 24 connected to the positive wiring and the negative electrode connected to the negative wiring. Specifically, the light-emitting devices 24 are electrically connected to the connecting wiring via conductors disposed within the vias, and there is no series connection between the light-emitting devices 24, enabling regional control. The light emitting device 24 may be a sub-millimeter light emitting diode or a micro light emitting diode, and one light emitting device 24 forms one sub-pixel.

[0086] A protective layer 27 is provided on the side of the shielding layer 23 facing away from the driving substrate. The protective layer 27 is used to protect the light emitting device 24 from being bumped and corroded by water vapor.

[0087] Of course, in some other exemplary embodiments of the present disclosure, multiple connecting wires may also be provided in the base layer 22 , that is, multiple grooves 33 are formed by etching the base layer 22 , and then connecting wires are formed in each groove 33 .

[0088] The plurality of light-emitting devices 24 may include a first light-emitting device 24a, a second light-emitting device 24b, and a third light-emitting device 24c. The first light-emitting device 24a, the second light-emitting device 24b, and the third light-emitting device 24c may emit different colors of light. For example, the first light-emitting device 24a may emit red light, the second light-emitting device 24b may emit green light, and the third light-emitting device 24c may emit blue light. In this case, one light-emitting device 24 forms a sub-pixel of the light-emitting panel 2. For example, the first light-emitting device 24a forms the fourth sub-pixel 2a, the second light-emitting device 24b forms the fifth sub-pixel 2b, and the third light-emitting device 24c forms the sixth sub-pixel 2c.

[0089] Of course, in the case where the sub-display panel 11 includes white sub-pixels, the plurality of light-emitting devices 24 may further include a fourth light-emitting device that emits white light.

[0090] Optionally, the light-emitting panel 2 may further include multiple filter layers 26, each disposed on the light-emitting side of each of the light-emitting devices 24 in a one-to-one correspondence, i.e., one filter layer 26 is disposed on the light-emitting side of each light-emitting device 24. The filter layers 26 may include a first filter layer 26a, a second filter layer 26b, and a third filter layer 26c. The first filter layer 26a may be a red filter layer, i.e., the first filter layer 26a only allows red light to pass through. The second filter layer 26b may be a green filter layer, i.e., the second filter layer 26b only allows green light to pass through. The third filter layer 26c may be a blue filter layer, i.e., the third filter layer 26c only allows blue light to pass through. The filter layers 26 can filter the light emitted by the first, second, and third light-emitting devices 24a, 24b, and 24c to ensure the color gamut of the light-emitting panel 2.

[0091] In some other example embodiments of the present disclosure, as shown in FIG7 , the light-emitting colors of the plurality of light-emitting devices 24 are the same, and the plurality of light-emitting devices 24 are blue light-emitting devices or ultraviolet light-emitting devices, that is, the plurality of light-emitting devices 24 all emit blue light, or the plurality of light-emitting devices 24 all emit ultraviolet light. In this case, the light-emitting plate 2 may further include a plurality of light excitation portions 25, and the plurality of light excitation portions 25 are arranged one-to-one on the light-emitting sides of the plurality of light-emitting devices 24, that is, a light excitation portion 25 is provided on the light-emitting side of a light-emitting device 24; the plurality of light excitation portions 25 may include a first light excitation portion 25a, a second light excitation portion 25b, and a third light excitation portion 25c, the first light excitation portion 25a being capable of receiving blue light or ultraviolet light and exciting to produce red light, the second light excitation portion 25b being capable of receiving blue light or ultraviolet light and exciting to produce green light, and the third light excitation portion 25c being capable of receiving blue light or ultraviolet light and exciting to produce blue light. In this case, one light excitation portion 25 forms a sub-pixel of the light-emitting panel 2. For example, the first light excitation portion 25a forms the fourth sub-pixel 2a, the second light excitation portion 25b forms the fifth sub-pixel 2b, and the third light excitation portion 25c forms the sixth sub-pixel 2c.

[0092] Optionally, the light-emitting panel 2 may further include a plurality of filter layers 26, which are arranged one-to-one on the light-emitting side of the plurality of light-excitation sections 25. The filter layers 26 may include a first filter layer 26a, a second filter layer 26b, and a third filter layer 26c. The first filter layer 26a may be a red filter layer, that is, the first filter layer 26a can only pass red light. The second filter layer 26b may be a green filter layer, that is, the second filter layer 26b can only pass green light. The third filter layer 26c may be a blue filter layer, that is, the third filter layer 26c can only pass blue light. The light excited by the first light-excitation section 25a, the second light-excitation section 25b, and the third light-excitation section 25c can be filtered by the filter layers 26 to ensure the color gamut of the light-emitting panel 2.

[0093] In some other exemplary embodiments of the present disclosure, the multiple light-emitting devices 24 can emit the same color. Specifically, the multiple light-emitting devices 24 can be white light-emitting devices, that is, all of the light-emitting devices 24 emit white light. In this case, the light-emitting panel 2 can include multiple filter layers 26, each correspondingly disposed on the light-emitting side of the multiple light-emitting devices 24. Specifically, one filter layer 26 is disposed on the light-emitting side of each light-emitting device 24. The filter layers 26 can include a first filter layer 26a, a second filter layer 26b, and a third filter layer 26c. The first filter layer 26a can be a red filter layer, that is, only allowing red light to pass through. The second filter layer 26b can be a green filter layer, that is, only allowing green light to pass through. The third filter layer 26c can be a blue filter layer, that is, only allowing blue light to pass through. The filter layers 26 can filter the light emitted by each light-emitting device 24 to ensure the color gamut of the light-emitting panel 2.

[0094] It should be noted that when the light-emitting panel 2 is provided with a filter layer 26, one filter layer 26 forms a sub-pixel of the light-emitting panel 2. For example, the first filter layer 26a forms the fourth sub-pixel 2a, the second filter layer 26b forms the fifth sub-pixel 2b, and the third filter layer 26c forms the sixth sub-pixel 2c.

[0095] In this exemplary embodiment, the pixel arrangement structure of the sub-display panel 11 is the same as that of the light-emitting panel 2. For example, the pixel arrangement structure of the sub-display panel 11 is a typical RGB arrangement, and the pixel arrangement structure of the light-emitting panel 2 is also a typical RGB arrangement; the pixel arrangement structure of the sub-display panel 11 is a diamond arrangement, and the pixel arrangement structure of the light-emitting panel 2 is also a diamond arrangement. Of course, other arrangements are also possible, which are not described here. This ensures that the display effect of the light-emitting panel 2 is consistent with that of the sub-display panel 11, avoiding the feeling of screen fragmentation.

[0096] The ratio of the pixel density of the sub-display panel 11 to the pixel density of the light-emitting panel 2 is greater than or equal to 0.95 and less than or equal to 1.05. For example, the ratio of the pixel density of the sub-display panel 11 to the pixel density of the light-emitting panel 2 can be 0.96, 0.97, 0.98, 0.99, 1, 1.01, 1.02, 1.03, 1.04, etc. That is, the pixel density of the sub-display panel 11 is substantially the same as the pixel density of the light-emitting panel 2, so as to ensure that the display effect of the light-emitting panel 2 is consistent with the display effect of the sub-display panel 11, and avoid a sense of screen fragmentation.

[0097] Of course, in some other exemplary embodiments of the present disclosure, the light-emitting panel 2 may be a light-emitting diode light-emitting panel with a small pitch.

[0098] In this exemplary embodiment, as shown in Figures 3 and 4 , a gap is provided between two adjacent sub-display panels 11. Connecting wires 28 of the light-emitting panel 2 extend through this gap and to the non-display side of the main display panel 1. The connecting wires 28 of the light-emitting panel 2 can be provided on a flexible printed circuit board. Furthermore, a connector 29 is electrically connected to the end of the connecting wire 28 extending from the non-display side of the main display panel 1. This connector 29 enables electrical connection to a controller, power supply, and the like. The connecting wires 28 may include power lines, signal lines, and the like.

[0099] As shown in Figures 3 and 4 , the sub-display panel 11 may further include a front frame 4, which holds together the backlight module 111, the array substrate 112, the liquid crystal layer 113, and the color filter substrate 114. The front frame 4 may be made of metal or other materials that dissipate heat well. The light-emitting panel 2 may be bonded to the front frame 4 using thermally conductive adhesive, which allows heat dissipation from the light-emitting panel 2.

[0100] In some other example embodiments, as shown in Figure 8, the gap between two adjacent sub-display panels 11 can be set to be wider, and a bracket 5 is provided in the gap. The light-emitting panel 2 can be bonded and fixed to the bracket 5 by thermally conductive adhesive, so that the bracket 5 can support the light-emitting panel 2; the material of the bracket 5 can be an alloy or other heat-dissipating material with low density, and the light-emitting panel 2 can be dissipated through the bracket 5, that is, the bracket 5 can provide a heat dissipation channel for the light-emitting panel 2.

[0101] The width of the bracket 5 is greater than or equal to 10 mm and less than or equal to 15 mm. For example, the width of the bracket 5 can be 10.5 mm, 11 mm, 11.5 mm, 12 mm, 12.5 mm, 13 mm, 13.5 mm, 14 mm, 14.5 mm, etc.

[0102] If the width of the bracket 5 is too narrow, it is not easy to install. If the width of the bracket 5 is too wide, a wider light-emitting panel 2 is required, which increases the cost of the spliced ​​display module. The above numerical range is not only convenient for installation, but also does not significantly increase the cost of the spliced ​​display module.

[0103] In this case, it can be applicable to a sub-display panel 11 without a front frame 4 , and also applicable to a common display module with an injection-molded front frame 4 .

[0104] In this exemplary embodiment, as shown in Figures 3, 4, and 8, a cover plate 3 is provided on the light-emitting sides of the main display panel 1 and the light-emitting panel 2. Specifically, the cover plate 3 is provided on the light-emitting side of the main display panel 1 and the light-emitting panel 2. The cover plate 3 protects the main display panel 1 and the light-emitting panel 2 and eliminates the sense of fragmentation in the image caused by the height difference between the main display panel 1 and the light-emitting panel 2.

[0105] The cover plate 3 has a first surface 31 and a second surface 32 arranged opposite to each other. The second surface 32 is closer to the main display panel 1 than the first surface 31, that is, the side of the cover plate 3 close to the main display panel 1 is the second surface 32, and the side away from the main display panel 1 is the first surface 31.

[0106] The second surface 32 of the cover plate 3 may be in contact with the main display panel 1 . Of course, a gap may be provided between the second surface 32 of the cover plate 3 and the main display panel 1 .

[0107] The light-emitting panel 2 can supplement the display of the main display panel 1 in the spliced ​​non-display area PFA and the display of sub-pixels with relatively low brightness; however, referring to Figures 9-11, Figure 9 is a schematic diagram of the dark band generated when the viewing angle is less than the maximum light-emitting angle a of the light-emitting panel 2, Figure 10 is a schematic diagram of the dark band generated when the viewing angle is equal to the maximum light-emitting angle a of the light-emitting panel 2, and Figure 11 is a schematic diagram of the dark band generated when the viewing angle is greater than the maximum light-emitting angle a of the light-emitting panel 2; since the light-emitting panel 2 is arranged on the side of the display surface away from the main display panel 1, the light-emitting panel 2 has a certain thickness, and a dark band will appear when the viewing angle is large, that is, a technical problem of a dark band at a side viewing angle will occur; and the larger the viewing angle, the larger the width of the dark band, the thicker the light-emitting panel 2, and the wider the dark band, and the light intensity at the dark band is significantly reduced.

[0108] In this example embodiment, referring to Figures 3, 4 and 8, a groove 33 is provided on the second surface 32, and the orthographic projection of the groove 33 on the first reference plane overlaps with the orthographic projection of the light-emitting board 2 on the first reference plane. For example, the orthographic projection of the groove 33 on the first reference plane may cover and be larger than the orthographic projection of the light-emitting board 2 on the first reference plane, or the edge line of the orthographic projection of the groove 33 on the first reference plane may completely coincide with the edge line of the orthographic projection of the light-emitting board 2 on the first reference plane. In both cases, the orthographic projection of the groove 33 on the first reference plane completely covers the orthographic projection of the light-emitting board 2 on the first reference plane. Since the second surface 32 of the cover plate 3 is in contact with the main display panel 1, and the light-emitting board 2 is provided on the side of the display surface facing away from the main display panel 1, the light-emitting board 2 protrudes from the main display panel 1, and the groove 33 can be used to accommodate the light-emitting board 2.

[0109] Of course, in some other exemplary embodiments of the present disclosure, a portion of the orthographic projection of the groove 33 on the first reference plane may overlap with a portion of the orthographic projection of the light-emitting board 2 on the first reference plane.

[0110] 12 to 15 , the first portion 3321 of the groove sidewall 332 is divided for the sake of convenience of explanation and is therefore represented by a dotted line in the figure. A light adjustment structure 34 is provided on the groove sidewall 332 of the groove 33. The light adjustment structure 34 is used to refract part of the light from the sub-display panel 11 and part of the light from the light-emitting panel 2 to the dark band and emit them out. That is, the light adjustment structure 34 can change the direction of light propagation to cover the dark band, thereby increasing the light intensity at the dark band and reducing or even avoiding the generation of the dark band.

[0111] 12 and 13, the light adjustment structure 34 may be a convex lens, and as shown in Figures 14 and 15, the light adjustment structure 34 may also be a Fresnel lens. The focal length of the convex lens is greater than 1 meter, and the focal length of the Fresnel lens is also greater than 1 meter.

[0112] The light adjustment structure 34 is a single protrusion extending along the sidewall 332 of the groove 33. If the light adjustment structure 34 is a convex lens, the light adjustment structure 34 is a single protrusion extending along the sidewall 332 of the groove 33. If the light adjustment structure 34 is a Fresnel lens, the light adjustment structure 34 is a plurality of protrusions extending along the sidewall 332 of the groove 33. This ensures that the light adjustment structure 34 adjusts the light uniformly throughout the entire non-display area (PFA), thereby ensuring a good display effect.

[0113] Specifically, as shown in Figures 12-16, the groove 33 may include groove sidewalls 332 and a groove bottom wall 331. The groove bottom wall 331 is flat and parallel to the display surface, while the groove sidewalls 332 intersect the display surface. The grooves 33 correspond one-to-one with the light-emitting board 2. Specifically, the number of grooves 33 is the same as the number of light-emitting boards 2, and the shape of the grooves 33 is the same as the shape of the light-emitting board 2. For example, if the light-emitting board 2 is configured as a long straight line, the grooves 33 are also configured as long straight lines; if the light-emitting board 2 is configured as a curved line, the grooves 33 are also configured as a curved line.

[0114] In order to avoid the influence of the groove side wall 332 on the display light at the normal viewing angle, the width K of the groove bottom wall 331 is greater than or equal to the width L of the light-emitting board 2, so that the orthographic projection of the groove bottom wall 331 on the first reference plane completely covers the orthographic projection of the light-emitting board 2 on the first reference plane, so as to ensure that the sub-display panel 11 and the light-emitting board 2 will not be deformed when displayed at the normal viewing angle.

[0115] In FIG16 , only the first distance J1 between a point on the first portion 3321 and the light-emitting board 2 in the first direction X, and the second distance J2 between the point and the sub-display panel 11 in the second direction Y are marked. The groove sidewall 332 of the groove 33 may include a first portion 3321, the distance between the first portion 3321 and the light-emitting board 2 in the first direction X is the first distance J1, the distance between the first portion 3321 and the sub-display panel 11 in the second direction Y is the second distance J2, and the first distance J1 decreases as the second distance J2 increases, that is, at least a portion of the groove sidewall 332 of the groove 33 is inclined, and the groove 33 is formed into a structure in which the opening portion is larger than the bottom.

[0116] Moreover, the light adjustment structure 34 is arranged on the first part 3321, so that the light adjustment structure 34 is also arranged obliquely, which can play a good role in adjusting the side viewing angle light.

[0117] It should be noted that, in the present disclosure, the first direction X is parallel to the display surface, and the second direction Y is perpendicular to the display surface.

[0118] In this example embodiment, the groove sidewall 332 of the groove 33 may further include a second portion 3322. The second portion 3322 is closer to the main display panel 1 than the first portion 3321. The second portion 3322 is disposed substantially perpendicular to the main display panel 1. That is, the angle between the second portion 3322 and the main display panel 1 is greater than or equal to 85° and less than or equal to 95°. For example, the angle between the second portion 3322 and the main display panel 1 may be 88°, 90°, 92°, etc. The distance between the second portions 3322 on opposite sides of the groove 33 may be equal to the maximum distance between the first portions 3321 on the opposite sides.

[0119] The height M of the second portion 3322 in the second direction Y satisfies the relationship: M≤D*tan(90°-a), where D is the maximum distance between the light-adjusting structure 34 and the side of the light-emitting panel 2, and a is the maximum luminous angle of the light-emitting panel 2. This ensures that all light reaching the dark band passes through the light-adjusting structure 34, i.e., the largest dark band passes through the light-adjusting structure 34. This allows the light-adjusting structure 34 to perform a light-adjusting function, refracting part of the light from the sub-display panel 11 and part of the light from the light-emitting panel 2 toward the dark band and out, thereby increasing the light intensity in the dark band and reducing or even preventing the formation of dark bands.

[0120] Of course, in some other exemplary embodiments of the present disclosure, the groove 33 may not include the second portion 3322 , but only include the first portion 3321 .

[0121] Specifically, as shown in Figure 16 , the width of the light-emitting panel 2 is L, the maximum light-emitting angle of the light-emitting panel 2 is a, and the thickness of the light-emitting panel 2 is I, that is, the distance between the display surface of the light-emitting panel 2 and the display surface of the main display panel 1 is I; the thickness of the cover plate 3 is T; the angle between the first portion 3321 of the groove sidewall 332 and the display surface of the main display panel 1 is b; the maximum distance between the light-adjusting structure 34 and the side of the light-emitting panel 2 is D; and the maximum width of the dark band is H. Generally, after the light-emitting panel 2 is selected, the parameters of the light-emitting panel 2 (L, a, I) are all fixed.

[0122] H=I*Sina, the maximum luminous angle a of the luminous panel 2 is a constant, therefore, the maximum width H of the dark band is proportional to the thickness I of the luminous panel 2 , and the maximum width H of the dark band can be reduced by reducing the thickness I of the luminous panel 2 .

[0123] Furthermore, to ensure that the refracted light from the sub-display panel 11 covers at least half of the dark bands, D ≥ H / 2 is required; that is, the maximum distance D between the light-adjusting structure 34 and the side of the light-emitting panel 2 and the maximum width H of the dark bands satisfy the relationship: D ≥ H / 2. To ensure that the refracted light from the light-emitting panel 2 covers at least the other half of the dark bands on both sides of the light-emitting panel 2, L ≥ H is required; that is, the width L of the light-emitting panel 2 and the maximum width H of the dark bands satisfy the relationship: L ≥ H.

[0124] As shown in Figure 17, when the maximum light-emitting angle a of the light-emitting panel 2 is 60°, the thickness I of the light-emitting panel 2 is 0.6 mm, the maximum distance D between the light-adjusting structure 34 and the side of the light-emitting panel 2 is 0.52 mm, the width L of the light-emitting panel 2 is 5 mm, and the thickness T of the cover plate 3 is 6 mm; when the angle b between the first part 3321 of the groove side wall 332 and the display surface of the main display panel 1 is 30 degrees, the dark band is relatively unnoticeable at all viewing angles, and the display effect is optimal.

[0125] Therefore, the angle b between the first portion 3321 of the groove sidewall 332 and the display surface of the main display panel 1 is greater than or equal to 0.4a and less than or equal to 0.6a. For example, the angle b between the first portion 3321 of the groove sidewall 332 and the display surface of the main display panel 1 can be 0.43a, 0.45a, 0.48a, 0.5a, 0.52a, 0.55a, 0.57a, etc.

[0126] Referring to Figure 18 , software-simulated dark band elimination effects are shown for four scenarios, where the maximum light-emitting angle a of the light-emitting panel 2 is 60°, the thickness I of the light-emitting panel 2 is 0.8 mm, the angle b between the first portion 3321 of the groove sidewall 332 and the display surface of the main display panel 1 is 30°, the width L of the light-emitting panel 2 is 5 mm, and the thickness T of the cover plate 3 is 6 mm. Furthermore, at a viewing angle of 60°, the maximum distance D between the light-adjusting structure 34 and the side of the light-emitting panel 2 is 0.1 mm, 0.2 mm, 0.3 mm, and 0.4 mm. The figure shows that when the maximum distance D between the light-adjusting structure 34 and the side of the light-emitting panel 2 is 0.4 mm, the dark band is least noticeable, resulting in the best display quality. Furthermore, the maximum width H of the dark band measured in this state is approximately 0.34 mm.

[0127] Therefore, the maximum distance D between the light adjustment structure 34 and the side of the light-emitting board 2 is greater than or equal to 0.35 mm and less than or equal to 0.45 mm. For example, the maximum distance D between the light adjustment structure 34 and the side of the light-emitting board 2 can be 0.38 mm, 0.4 mm, 0.42 mm, etc.

[0128] Moreover, the remaining thickness of the cover plate 3 at the groove 33 is greater than or equal to 4.5 mm and less than or equal to 5.5 mm. For example, the remaining thickness of the cover plate 3 at the groove 33 can be 4.8 mm, 5 mm, 5.2 mm, etc. This arrangement ensures that the cover plate 3 can be processed and formed while ensuring toughness and strength.

[0129] It should be noted that, as shown in Figure 11 , when the viewing angle exceeds the maximum emission angle a of the light-emitting panel 2, the width of the dark band will vary with the distance between the observer and the spliced ​​display module, making it difficult to eliminate the dark band at this angle. Therefore, the technical solution disclosed herein primarily eliminates the dark band when the viewing angle is less than or equal to the maximum emission angle a of the light-emitting panel 2.

[0130] In this exemplary embodiment, the ratio of the color gamut value of the sub-display panel 11 to the color gamut value of the light-emitting panel 2 is greater than or equal to 0.95 and less than or equal to 1.05. For example, the ratio of the color gamut value of the sub-display panel 11 to the color gamut value of the light-emitting panel 2 can be 0.98, 1, or 1.02. That is, the color gamut value of the sub-display panel 11 is substantially consistent with the color gamut value of the light-emitting panel 2, thereby reducing or even eliminating the color difference between the sub-display panel 11 and the light-emitting panel 2.

[0131] Specifically, in some example embodiments of the present disclosure, the sub-display panel 11 may include a first sub-pixel 11a, a second sub-pixel 11b, and a third sub-pixel 11c. The first sub-pixel 11a may be a red sub-pixel, that is, the first sub-pixel 11a may emit red light; the second sub-pixel 11b may be a green sub-pixel, that is, the second sub-pixel 11b may emit green light; and the third sub-pixel 11c may be a blue sub-pixel, that is, the third sub-pixel 11c may emit blue light.

[0132] The light-emitting panel 2 may include a fourth sub-pixel 2a, a fifth sub-pixel 2b and a sixth sub-pixel 2c. The fourth sub-pixel 2a may be a red sub-pixel, that is, the fourth sub-pixel 2a may emit red light; the fifth sub-pixel 2b may be a green sub-pixel, that is, the fifth sub-pixel 2b may emit green light; the sixth sub-pixel 2c may be a blue sub-pixel, that is, the sixth sub-pixel 2c may emit blue light.

[0133] The absolute value of the difference between the center wavelength of the first subpixel 11a and the center wavelength of the fourth subpixel 2a is less than or equal to 2 nanometers. For example, the absolute value of the difference between the center wavelength of the first subpixel 11a and the center wavelength of the fourth subpixel 2a can be 0, 0.3 nanometers, 0.5 nanometers, 0.8 nanometers, 1 nanometer, 1.2 nanometers, 1.5 nanometers, 1.7 nanometers, etc. The absolute value of the difference between the center wavelength of the second subpixel 11b and the center wavelength of the fifth subpixel 2b is less than or equal to 2 nanometers. For example, the absolute value of the difference between the center wavelength of the second subpixel 11b and the center wavelength of the fifth subpixel 2b can be 0, 0.3 nanometers, 0.5 nanometers, 0.8 nanometers, 1 nanometer, 1.2 nanometers, 1.5 nanometers, 1.7 nanometers, etc. The absolute value of the difference between the central wavelength of the third sub-pixel 11c and the central wavelength of the sixth sub-pixel 2c is less than or equal to 2 nanometers. For example, the absolute value of the difference between the central wavelength of the third sub-pixel 11c and the central wavelength of the sixth sub-pixel 2c can be 0, 0.3 nanometers, 0.5 nanometers, 0.8 nanometers, 1 nanometer, 1.2 nanometers, 1.5 nanometers, 1.7 nanometers, etc.

[0134] As shown in Figure 19 , the center wavelength of the first subpixel 11a is approximately 590nm-620nm, and the center wavelength of the fourth subpixel 2a is also substantially within this range. The center wavelength of the second subpixel 11b is approximately 530nm-550nm, and the center wavelength of the fifth subpixel 2b is also substantially within this range. The center wavelength of the third subpixel 11c is approximately 445nm-455nm, and the center wavelength of the sixth subpixel 2c is also substantially within this range. This ensures that the ratio of the color gamut value of the sub-display panel 11 to the color gamut value of the light-emitting panel 2 is greater than or equal to 0.95 and less than or equal to 1.05. Of course, the above values ​​are merely examples, and the range of the center wavelengths of each subpixel will vary depending on the display panel.

[0135] In some other exemplary embodiments of the present disclosure, the light-emitting panel 2 may include a plurality of light-emitting devices 24 and a first light excitation portion 25a, a second light excitation portion 25b and a third light excitation portion 25c provided on the light-emitting side of the light-emitting device 24. The light-emitting device 24 is a blue or ultraviolet light-emitting diode, that is, the light emitted by the light-emitting device 24 is blue light or ultraviolet light; the material of the first light excitation portion 25a can be divalent europium strontium titanate salt or trivalent europium ion silicate (red powder), so that the absolute value of the difference between the center wavelength of the red light excited by the first light excitation portion 25a and the center wavelength of the first sub-pixel 11a is less than or equal to 2 nanometers; the material of the second light excitation portion 25b can be trivalent erbium ion silicate (green powder), so that the absolute value of the difference between the center wavelength of the green light excited by the second light excitation portion 25b and the center wavelength of the second sub-pixel 11b is less than or equal to 2 nanometers; the material of the third light excitation portion 25c can be divalent manganese strontium titanate salt (blue powder), so that the absolute value of the difference between the center wavelength of the blue light excited by the third light excitation portion 25c and the center wavelength of the third sub-pixel 11c is less than or equal to 2 nanometers. Thus, the ratio of the color gamut value of the sub-display panel 11 to the color gamut value of the light-emitting panel 2 is greater than or equal to 0.95 and less than or equal to 1.05.

[0136] In some further exemplary embodiments of the present disclosure, the sub-display panel 11 may include a first filter portion 1141a, a second filter portion 1141b, and a third filter portion 1141c. The first filter portion 1141a may be a red filter portion, i.e., the first filter portion 1141a only passes red light. The second filter portion 1141b may be a green filter portion, i.e., the second filter portion 1141b only passes green light. The third filter portion 1141c may be a blue filter portion, i.e., the third filter portion 1141c only passes blue light. The light-emitting panel 2 may include a first filter layer 26a, a second filter layer 26b, and a third filter layer 26c. The first filter layer 26a may be a red filter layer, i.e., the first filter layer 26a only passes red light. The second filter layer 26b may be a green filter layer, i.e., the second filter layer 26b only passes green light. The third filter layer 26c may be a blue filter layer, that is, the third filter layer 26c can only pass blue light.

[0137] In this case, the absolute value of the difference between the center wavelength of light transmitted by the first filter portion 1141a and the center wavelength of light transmitted by the first filter layer 26a is less than or equal to 2 nanometers, so that the absolute value of the difference between the center wavelength of light passing through the first filter portion 1141a and the center wavelength of light passing through the first filter layer 26a is less than or equal to 2 nanometers. The absolute value of the difference between the center wavelength of light passing through the second filter portion 1141b and the center wavelength of light passing through the second filter layer 26b is less than or equal to 2 nanometers, so that the absolute value of the difference between the center wavelength of light passing through the second filter portion 1141b and the center wavelength of light passing through the second filter layer 26b is less than or equal to 2 nanometers. The absolute value of the difference between the center wavelength of light transmitting through the third filter portion 1141c and the center wavelength of light transmitting through the third filter layer 26c is less than or equal to 2 nanometers, so that the absolute value of the difference between the center wavelength of light passing through the third filter portion 1141c and the center wavelength of light passing through the third filter layer 26c is less than or equal to 2 nanometers. Thus, the ratio of the color gamut value of the sub-display panel 11 to the color gamut value of the light-emitting panel 2 is greater than or equal to 0.95 and less than or equal to 1.05.

[0138] Specifically, the material of the first filter portion 1141a may be the same as that of the first filter layer 26a, the material of the second filter portion 1141b may be the same as that of the second filter layer 26b, and the material of the third filter portion 1141c may be the same as that of the third filter layer 26c.

[0139] Of course, the first filter layer 26a, the second filter layer 26b and the third filter layer 26c can be Bragg reflection layers stacked by materials with different refractive indices (the red filter layer can reflect blue and green light and only pass red light; the green filter layer can reflect red and blue light and only pass green light; the blue filter layer can reflect red and green light and only pass blue light).

[0140] Based on the same inventive concept, an exemplary embodiment of the present disclosure provides a display device, which may include any of the spliced ​​display modules described above. The specific structure of the spliced ​​display module has been described in detail above, so it will not be repeated here.

[0141] The specific type of the display device is not particularly limited. Any type of display device commonly used in the field can be used, such as outdoor advertising screens, large indoor screens, etc. Those skilled in the art can make corresponding choices based on the specific purpose of the display device, which will not be repeated here.

[0142] It should be noted that, in addition to the spliced ​​display module, the display device also includes other necessary parts and components, such as a housing, a circuit board, a power cord, etc. Those skilled in the art can make corresponding supplements based on the specific usage requirements of the display device, which will not be repeated here.

[0143] Compared with the prior art, the beneficial effects of the display device provided by the exemplary embodiment of the present invention are the same as the beneficial effects of the spliced ​​display module provided by the above exemplary embodiment, and are not described in detail here.

[0144] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A spliced ​​display module, wherein: include: A main display panel, comprising at least two sub-display panels, wherein the sub-display panels include a plurality of light-emitting portions, a splicing non-display area is provided between two adjacent sub-display panels, and the main display panel has a display surface; A light-emitting panel is provided on a side of the display surface facing away from the main display panel, the orthographic projection of the light-emitting panel on a first reference plane at least overlaps with the orthographic projection of the spliced ​​non-display area on the first reference plane, and the first reference plane is parallel to the display surface.

2. The splicing display module according to claim 1, wherein: The splicing display module also includes: A cover plate is provided on the light-emitting side of the main display panel and the light-emitting panel, the cover plate having a first surface and a second surface arranged opposite to each other, the second surface being closer to the main display panel than the first surface, the second surface being provided with a groove, the orthographic projection of the groove on the first reference plane overlapping with the orthographic projection of the light-emitting panel on the first reference plane, a light-adjusting structure being provided on the side wall of the groove, the light-adjusting structure being used to refract a portion of the light from the sub-display panel and a portion of the light from the light-emitting panel to a dark band and emit them.

3. The spliced ​​display module according to claim 2, wherein: The light adjustment structure is a convex lens or a Fresnel lens.

4. The spliced ​​display module according to claim 2, wherein: The groove side wall of the groove includes a first part, the distance between the first part and the light-emitting board in the first direction is a first distance, the distance between the first part and the sub-display panel in the second direction is a second distance, the first distance decreases as the second distance increases, the light adjustment structure is arranged in the first part, the first direction is parallel to the display surface, and the second direction is perpendicular to the display surface.

5. The spliced ​​display module according to claim 4, wherein: The groove sidewall of the groove further includes a second portion, which is connected to the first portion and is closer to the main display panel than the first portion. The second portion is perpendicular to the main display panel.

6. The spliced ​​display module according to claim 5, wherein: The height M of the second portion in the second direction satisfies the relationship: M≤D*tan(90°-a), where D is the maximum distance between the light adjustment structure and the side of the light-emitting board, and a is the maximum light-emitting angle of the light-emitting board.

7. The spliced ​​display module according to claim 4, wherein: The bottom wall of the groove is set to be a plane parallel to the display surface.

8. The spliced ​​display module according to claim 4, wherein: The maximum distance D between the light adjustment structure and the side of the light-emitting panel and the maximum width H of the dark band satisfy the relationship: D≥H / 2; the width L of the light-emitting panel and the maximum width H of the dark band satisfy the relationship: L≥H.

9. The spliced ​​display module according to claim 8, wherein: A maximum distance D between the light adjustment structure and a side surface of the light-emitting panel is greater than or equal to 0.35 mm and less than or equal to 0.45 mm.

10. The spliced ​​display module according to claim 4, wherein: An included angle b between the first portion of the groove sidewall and the display surface of the main display panel is greater than or equal to 0.4a and less than or equal to 0.6a, where a is the maximum luminous angle of the luminous panel.

11. The spliced ​​display module according to claim 2, wherein: The remaining thickness of the cover plate at the groove is greater than or equal to 4 mm and less than or equal to 6 mm.

12. The spliced ​​display module according to any one of claims 1 to 11, wherein: A ratio of a color gamut value of the sub-display panel to a color gamut value of the light-emitting panel is greater than or equal to 0.95 and less than or equal to 1.

05.

13. The spliced ​​display module according to claim 12, wherein: The sub-display panel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel; the light-emitting panel includes a fourth sub-pixel, a fifth sub-pixel, and a sixth sub-pixel; an absolute value of a difference between a center wavelength of the first sub-pixel and a center wavelength of the fourth sub-pixel is less than or equal to 2 nanometers; an absolute value of a difference between a center wavelength of the second sub-pixel and a center wavelength of the fifth sub-pixel is less than or equal to 2 nanometers; and an absolute value of a difference between a center wavelength of the third sub-pixel and a center wavelength of the sixth sub-pixel is less than or equal to 2 nanometers; Alternatively, the light-emitting panel includes a plurality of light-emitting devices and a first light-excitation portion, a second light-excitation portion, and a third light-excitation portion provided on the light-emitting side of the light-emitting device, wherein the material of the first light-excitation portion is divalent europium strontium titanate salt or trivalent europium ion silicate, the material of the second light-excitation portion is trivalent erbium ion silicate, and the material of the third light-excitation portion is divalent manganese strontium titanate salt; Alternatively, the sub-display panel includes a first filter portion, a second filter portion, and a third filter portion, and the light-emitting panel includes a first filter layer, a second filter layer, and a third filter layer. The absolute value of the difference between the center wavelength of light that can be transmitted by the first filter portion and the center wavelength of light that can be transmitted by the first filter layer is less than or equal to 2 nanometers, the absolute value of the difference between the center wavelength of light that can be transmitted by the second filter portion and the center wavelength of light that can be transmitted by the second filter layer is less than or equal to 2 nanometers, and the absolute value of the difference between the center wavelength of light that can be transmitted by the third filter portion and the center wavelength of light that can be transmitted by the third filter layer is less than or equal to 2 nanometers.

14. The spliced ​​display module according to any one of claims 1 to 11, wherein: The orthographic projection of the light-emitting panel on the main display panel overlaps with two adjacent sub-display panels and covers at least two columns of sub-pixels of each sub-display panel.

15. The spliced ​​display module according to any one of claims 1 to 11, wherein: The sub-display panel is a liquid crystal display panel, and the light-emitting panel is a Mini LED light-emitting panel or a Micro LED light-emitting panel.

16. The spliced ​​display module according to any one of claims 1 to 11, wherein: A gap is provided between two adjacent sub-display panels, and the spliced ​​display module further comprises: A bracket is arranged in the gap, and is used to support the light-emitting board and provide a heat dissipation channel for the light-emitting board.

17. The spliced ​​display module according to any one of claims 1 to 11, wherein: The light-emitting panel comprises: The routing layer includes multiple connecting routing lines; A base layer is provided on one side of the wiring layer, and a plurality of vias connected to the connection wirings are provided on the base layer; a shielding layer, provided on a side of the base layer away from the routing layer, the shielding layer being provided with a plurality of openings; A plurality of light-emitting devices are disposed in the plurality of openings in a one-to-one correspondence, and the light-emitting devices are electrically connected to the connection traces through the via holes; The protective layer is arranged on a side of the shielding layer away from the base layer.

18. The spliced ​​display module according to claim 17, wherein: The plurality of light-emitting devices include a first light-emitting device, a second light-emitting device, and a third light-emitting device, and the first light-emitting device, the second light-emitting device, and the third light-emitting device emit light of different colors or the same white color; Alternatively, the plurality of light-emitting devices are blue light-emitting devices or ultraviolet light-emitting devices, and the light-emitting panel further comprises a plurality of light excitation portions, which are arranged one-to-one on the light-emitting sides of the plurality of light-emitting devices, and the plurality of light excitation portions comprise a first light excitation portion, a second light excitation portion and a third light excitation portion.

19. The spliced ​​display module according to claim 18, wherein: The light-emitting panel may further include: The plurality of filter layers are arranged on the light-emitting sides of the plurality of light-emitting devices in a one-to-one correspondence, or are arranged on the light-emitting sides of the plurality of light-excitation parts in a one-to-one correspondence.

20. The spliced ​​display module according to any one of claims 1 to 11, wherein: The pixel arrangement structure of the sub-display panel is the same as that of the light-emitting panel, and the ratio of the pixel density of the sub-display panel to the pixel density of the light-emitting panel is greater than or equal to 0.95 and less than or equal to 1.

05.

21. A display device, wherein: A display module comprising any one of claims 1 to 20.

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