Splicing display module and display device

Abstract

The utility model relates to the technical field of display, and discloses a tiled display module and a display device. The tiled display module can comprise a main display panel and a light-emitting plate, the main display panel comprises at least two sub display panels, each sub display panel comprises a plurality of light emitting parts, a splicing non-display area is arranged between every two adjacent sub display panels, and the main display panel is provided with a display surface; the light-emitting plate is arranged on the side, away from the main display panel, of the display face, the orthographic projection of the light-emitting plate on the first reference plane is at least overlapped with the orthographic projection of the splicing non-display area on the first reference plane, and the first reference plane is parallel to the display face. The splicing display module has a splicing-seam-free display effect when displaying a picture.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a spliced ​​display module and a display device. Background Art

[0002] In order to achieve a larger display area, multiple display panels are spliced ​​together for more and more applications. The size of the splicing seam and the visual effect of the splicing display module are the main competitive points in the current market, so reducing the physical and visual splicing seams is the primary technical problem to be solved.

[0003] 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 the prior art known to ordinary technicians in the field. Utility Model Content

[0004] 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.

[0005] According to one aspect of the present disclosure, a spliced ​​display module is provided, comprising:

[0006] 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;

[0007] A light-emitting panel is arranged on a side of the display surface 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.

[0008] In an exemplary embodiment of the present disclosure, the display device further includes:

[0009] A cover plate is arranged on the light emitting sides of the main display panel and the light emitting board, the cover plate has a first surface and a second surface arranged opposite to each other, the second surface is closer to the main display panel than the first surface, the second surface is provided with a groove, the orthographic projection of the groove on the first reference plane overlaps with the orthographic projection of the light emitting board on the first reference plane, and a light adjustment structure is arranged on the groove side wall of the groove, the light adjustment structure is used to refract a part of the light of the sub-display panel and a part of the light of the light emitting board to a dark band and emit them.

[0010] In an exemplary embodiment of the present disclosure, the light adjustment structure is a convex lens or a Fresnel lens.

[0011] In an exemplary embodiment of the present disclosure, the groove side wall of the groove includes a first part, the distance between the first part and the light-emitting panel 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.

[0012] 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.

[0013] In an exemplary embodiment of the present disclosure, a height M of the second portion 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 board, and a is the maximum light-emitting angle of the light-emitting board.

[0014] 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.

[0015] In an exemplary embodiment of the present disclosure, the maximum distance D between the light adjustment structure and the side of the light-emitting board and the maximum width H of the dark band satisfy the relationship: D≥H / 2; the width L of the light-emitting board and the maximum width H of the dark band satisfy the relationship: L≥H.

[0016] 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.

[0017] In an exemplary embodiment of the present disclosure, an angle b between the first portion of the groove side wall 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, wherein a is the maximum light-emitting angle of the light-emitting panel.

[0018] 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.

[0019] 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.

[0020] 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 central wavelength of the first sub-pixel and a central wavelength of the fourth sub-pixel is less than or equal to 2 nanometers, an absolute value of a difference between a central wavelength of the second sub-pixel and a central wavelength of the fifth sub-pixel is less than or equal to 2 nanometers, and an absolute value of a difference between a central wavelength of the third sub-pixel and a central wavelength of the sixth sub-pixel is less than or equal to 2 nanometers;

[0021] 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 arranged 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;

[0022] Alternatively, the sub-display panel includes a first filter portion, a second filter portion and a third filter portion, 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.

[0023] 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 of the sub-display panels.

[0024] 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.

[0025] In an exemplary embodiment of the present disclosure, a gap is provided between two adjacent sub-display panels, and the display device further includes:

[0026] 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.

[0027] In an exemplary embodiment of the present disclosure, the light emitting panel comprises:

[0028] The routing layer includes multiple connecting routing lines;

[0029] A base layer, disposed on one side of the routing layer, wherein the base layer is provided with a plurality of vias connected to the connection routing lines;

[0030] A shielding layer, arranged on a side of the base layer away from the routing layer, and the shielding layer is provided with a plurality of openings;

[0031] 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;

[0032] The protective layer is arranged on a side of the shielding layer away from the base layer.

[0033] 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 light emitting colors of the first light emitting device, the second light emitting device and the third light emitting device are different or the same white;

[0034] Alternatively, the multiple light-emitting devices are blue light-emitting devices or ultraviolet light-emitting devices, and the light-emitting board also includes multiple light excitation parts, and the multiple light excitation parts are arranged one by one on the light-emitting sides of the multiple light-emitting devices, and the multiple light excitation parts include a first light excitation part, a second light excitation part and a third light excitation part.

[0035] In an exemplary embodiment of the present disclosure, the light emitting panel may further include:

[0036] A plurality of filter layers are arranged one by one on the light-emitting sides of a plurality of the light-emitting devices, or are arranged one by one on the light-emitting sides of a plurality of the light-excitation parts.

[0037] 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.

[0038] According to another aspect of the present disclosure, a display device is provided, comprising any one of the display modules described above.

[0039] The spliced ​​display module disclosed in the present invention is provided with a light-emitting panel on the side of the display surface facing away from the main display panel, and the orthographic projection of the light-emitting panel on the first reference plane at least overlaps with the orthographic projection of the spliced ​​non-display area on the first reference plane. The light-emitting panel can at least shield the spliced ​​non-display area, so that the spliced ​​display module has a seamless display effect when displaying the picture.

[0040] 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 present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings herein are incorporated into the specification 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 accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0042] Figure 1 It is a structural schematic diagram of an exemplary implementation of a spliced ​​display module disclosed in the present invention.

[0043] Figure 2 for Figure 1 A schematic structural diagram of an exemplary embodiment of a neutron display panel.

[0044] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the spliced ​​display module.

[0045] Figure 4 for Figure 3 A partial enlarged schematic diagram of the part indicated by N.

[0046] Figure 5 for Figure 1 Edge sub-pixel brightness curve of the neutron display panel.

[0047] Figure 6 for Figure 1 A schematic structural diagram of an exemplary embodiment of a light-emitting panel.

[0048] Figure 7 for Figure 1 A schematic structural diagram of another exemplary embodiment of the light emitting panel.

[0049] Figure 8 It is a structural schematic diagram of another exemplary implementation of the spliced ​​display module disclosed in the present invention.

[0050] Figure 9-11 Schematic diagram of the optical path principle for generating dark bands in the spliced ​​display module disclosed in the present invention.

[0051] Fig.12 It is a structural schematic diagram of another exemplary implementation of the spliced ​​display module disclosed in the present invention.

[0052] Fig.13 for Fig.12 A partial enlarged schematic diagram of the part indicated by W1.

[0053] Fig.14 It is a structural schematic diagram of another exemplary implementation of the spliced ​​display module disclosed in the present invention.

[0054] Fig.15 for Fig.14 A partial enlarged schematic diagram of the part indicated by W2.

[0055] Fig.16 for Fig.12 Schematic diagram of the dimension marking of the spliced ​​display module.

[0056] Fig.17 It 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 in the present invention and the display surface of the main display panel is 10°, 30°, 50°, and 60°.

[0057] Fig.18 Schematic diagram of dark band elimination effect simulated by software under four conditions where 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 at a viewing angle of 60° for the spliced ​​display module disclosed herein.

[0058] Fig.19 for Figure 1 Schematic diagram of spectra of sub-pixels of different colors of the neutron display panel 11.

[0059] Description of reference numerals:

[0060] 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;

[0061] 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 excitation unit; 25a. First light excitation unit; 25b. Second light excitation unit; 25c. Third light excitation unit; 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;

[0062] 3. Cover plate; 31. First surface; 32. Second surface; 33. Groove; 331. Groove bottom wall; 332. Groove side wall; 3321. First part; 3322. Second part; 34. Light adjustment structure;

[0063] 4. Front frame; 5. Bracket;

[0064] AA, display area; FA, non-display area; PFA, spliced ​​non-display area;

[0065] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0066] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0067] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0068] 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 an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0069] The exemplary embodiment of the present disclosure provides a spliced ​​display module, referring to Figure 1-Figure 19 As shown, 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 away from the main display panel 1, and 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, and the first reference plane is parallel to the display surface.

[0070] The spliced ​​display module disclosed in the present invention 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.

[0071] In this example implementation, refer to Figure 1 As shown, 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 according to specific display requirements, which will not be explained one by one here.

[0072] At least two sub-display panels 11 are spliced ​​to form the main display panel 1, so that the main display panel 1 has a larger display surface.

[0073] A splicing non-display area PFA is provided between two adjacent sub-display panels 11. The sub-display panel 11 has a display area AA and a non-display area FA surrounding the display area AA. Due to the current design and process limitations of the sub-display panel 11, the non-display area FA cannot be eliminated temporarily. 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, etc.

[0074] 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, so 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, when the widths of the non-display areas FA of the 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.

[0075] 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 .

[0076] In order to facilitate splicing, the sub-display panel 11 is generally set as a rectangular display panel, so the splicing non-display area PFA is generally in the shape of a long straight line. Of course, in some exemplary embodiments, the sub-display panel 11 can also select other polygons, for example, it can be a trapezoid, parallelogram, rhombus, triangle, pentagon, hexagon and other structures with more sides. In this case, the splicing non-display area PFA is also in the shape of a long straight line, but it is inclined; the edge line of the sub-display panel 11 can also be a curve, in which case, the splicing non-display area PFA is curved.

[0077] In this example implementation, refer to Figure 2 As shown, the sub-display panel 11 may be a liquid crystal display panel, and 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 arranged on one side of the backlight module 111, the liquid crystal layer 113 is arranged on the side of the array substrate 112 away from the backlight module 111, and the color filter substrate 114 is arranged on the side of the liquid crystal layer 113 away from the backlight module 111. The backlight module 111 may include a plurality of light-emitting portions 1111. Of course, the sub-display panel 11 may also be a side-backlit liquid crystal display panel, that is, the plurality of light-emitting portions 1111 are arranged on the side of the light guide plate.

[0078] The color filter substrate 114 may include a plurality of filter sections 1141 and a black matrix, wherein a plurality of porous openings are provided on the black matrix, and the plurality of filter sections 1141 are provided in the openings one by one. The plurality of 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 can only pass red light. The second filter section 1141b may be a green filter section, i.e., the second filter section 1141b can only pass green light. The third filter section 1141c may be a blue filter section, i.e., the third filter section 1141c can only pass 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 may be a red sub-pixel, i.e., the first sub-pixel 11a may emit red light; the second sub-pixel 11b may be a green sub-pixel, i.e., the second sub-pixel 11b may emit green light; the third sub-pixel 11c may be a blue sub-pixel, i.e., the third sub-pixel 11c may emit blue light. Of course, the plurality of filter sections 1141 may further include a fourth filter section, and the fourth filter section may be a white filter section, i.e., the fourth filter section may pass white light.

[0079] Of course, in some other example embodiments of the present disclosure, the sub-display panel 11 may 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, and the like.

[0080] Reference Figure 1 , Figure 3 and Figure 4 As shown, the light-emitting board 2 is arranged on the side of the display surface away from the main display panel 1, that is, the light-emitting board 2 is arranged on the light-emitting side of the main display panel 1; the orthographic projection of the light-emitting board 2 on the first reference plane at least overlaps with the orthographic projection of the splicing non-display area PFA on the first reference plane, for example, the orthographic projection of the light-emitting board 2 on the first reference plane may cover and be larger than the orthographic projection of the splicing non-display area PFA on the first reference plane, or the edge line of the orthographic projection of the light-emitting board 2 on the first reference plane may coincide with the edge line of the orthographic projection of the splicing non-display area PFA on the first reference plane. In both cases, the orthographic projection of the light-emitting board 2 on the first reference plane completely covers the orthographic projection of the splicing non-display area PFA on the first reference plane; therefore, the shape of the light-emitting board 2 may be the same as that of the splicing non-display area PFA; for example, when the splicing non-display area PFA is set to a long straight line, the light-emitting board 2 is also set to a long straight line; when the splicing non-display area PFA is set to a curved shape, the light-emitting board 2 may be set to a curved shape or a straight line.

[0081] 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.

[0082] 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.

[0083] It should be noted that in the present disclosure, the first reference plane is parallel to the display surface.

[0084] 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 can see a large gap after splicing; when the relative brightness is lower than 85%, the human eye can perceive the darkening; Figure 5From the sub-pixel brightness curve at the edge of the sub-display panel 11 shown, 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; and, during display, 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, so as to ensure that there is no abnormality in the final display effect.

[0085] Of course, in some other example embodiments of the present disclosure, the sub-display panel 11 may have 3-4 or more dark sub-pixels at the edges. In this case, the orthographic 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.

[0086] It should be noted that the column refers to the extending direction of the gap between two adjacent sub-display panels 11 .

[0087] In this example embodiment, the light-emitting board 2 may be a Mini LED (Mini-Light-Emitting Diode, sub-millimeter light-emitting diode) light-emitting board 2 or a Micro LED (Micro-Light-Emitting Diode, micro light-emitting diode) light-emitting board 2, and the like.

[0088] The following description will be made by taking the light emitting panel 2 as a Mini LED light emitting panel 2 as an example.

[0089] Reference Figure 6 As shown, the light-emitting board 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 the wiring layer 21 may be a flexible circuit board; the wiring layer 21 may also be a conductive layer disposed on a substrate. The base layer 22 is disposed on one side of the wiring layer 21, and a plurality of vias connected to the connecting wirings are disposed on the base layer 22.

[0090] A shielding layer 23 is provided on the side of the base layer 22 facing away from the wiring layer 21, and a plurality of openings are provided on the shielding layer 23, and the openings are through holes penetrating the shielding layer 23. The thickness of the base layer 22 should be less than 0.4 mm, so that the height difference between the light-emitting board 2 and the main display panel 1 is as small as possible. The spacing between two adjacent openings is about 0.05 mm, the thickness of the shielding layer 23 is generally less than 0.2 mm, and the diameter of the opening is about 0.2 mm. A plurality of light-emitting devices 24 are provided in a plurality of openings in a one-to-one correspondence, that is, a light-emitting device 24 is provided in one opening, and the light-emitting device 24 is electrically connected to the connecting wiring through a via. Figure 6 and Figure 7 It is shown that the positive and negative electrodes of the light emitting device 24 are connected to the wiring layer 21, and the positive electrode of the light emitting device 24 is connected to the positive wiring, and the negative electrode is connected to the negative wiring; specifically, the light emitting device 24 is electrically connected to the connecting wiring through the conductor arranged in the via hole, and there is no series relationship between the light emitting devices 24, so as to realize regional control. The light emitting device 24 can be a sub-millimeter light emitting diode or a micro light emitting diode, and one light emitting device 24 forms a sub-pixel.

[0091] A protective layer 27 is disposed 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.

[0092] Of course, in some other exemplary embodiments of the present disclosure, a plurality of connecting wires may be provided in the base layer 22 , that is, a plurality of grooves 33 are formed by etching the base layer 22 , and then a connecting wire is formed in each groove 33 .

[0093] 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 light emitting colors of the first light emitting device 24a, the second light emitting device 24b, and the third light emitting device 24c are different. 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 a fourth sub-pixel 2a, the second light emitting device 24b forms a fifth sub-pixel 2b, and the third light emitting device 24c forms a sixth sub-pixel 2c.

[0094] 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, which emits white light.

[0095] Optionally, the light-emitting board 2 may further include a plurality of filter layers 26, which are arranged one by one on the light-emitting sides of the plurality of light-emitting devices 24, that is, a filter layer 26 is arranged on the light-emitting side of one light-emitting device 24. The filter layer 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 emitted by the first light-emitting device 24a, the second light-emitting device 24b, and the third light-emitting device 24c may be filtered by the filter layer 26 to ensure the color gamut of the light-emitting board 2.

[0096] In some other exemplary embodiments of the present disclosure, refer to Figure 7 As shown, the light emitting colors of the multiple light emitting devices 24 are the same, and the multiple light emitting devices 24 are blue light emitting devices or ultraviolet light emitting devices, that is, the multiple light emitting devices 24 all emit blue light, or the multiple light emitting devices 24 all emit ultraviolet light. In this case, the light emitting board 2 may also include multiple light excitation parts 25, and the multiple light excitation parts 25 are arranged on the light emitting sides of the multiple light emitting devices 24 in a one-to-one correspondence, that is, a light excitation part 25 is arranged on the light emitting side of a light emitting device 24; the multiple light excitation parts 25 may include a first light excitation part 25a, a second light excitation part 25b and a third light excitation part 25c, the first light excitation part 25a can receive blue light or ultraviolet light and excite to produce red light, the second light excitation part 25b can receive blue light or ultraviolet light and excite to produce green light, and the third light excitation part 25c can receive blue light or ultraviolet light and excite 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.

[0097] Optionally, the light-emitting plate 2 may further include a plurality of filter layers 26, which are arranged one by one on the light-emitting sides of the plurality of light-excitation units 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 unit 25a, the second light-excitation unit 25b, and the third light-excitation unit 25c may be filtered by the filter layer 26 to ensure the color gamut of the light-emitting plate 2.

[0098] In some other exemplary embodiments of the present disclosure, the light-emitting colors of the plurality of light-emitting devices 24 may be the same, and the plurality of light-emitting devices 24 are white light-emitting devices, that is, the plurality of light-emitting devices 24 all emit white light. In this case, the light-emitting board 2 may include a plurality of filter layers 26, and the plurality of filter layers 26 are arranged on the light-emitting sides of the plurality of light-emitting devices 24 in a one-to-one correspondence, that is, a filter layer 26 is arranged on the light-emitting side of a light-emitting device 24. The filter layer 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 emitted by each light-emitting device 24 may be filtered by the filter layer 26 to ensure the color gamut of the light-emitting board 2.

[0099] 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.

[0100] In this example implementation, the pixel arrangement structure of the sub-display panel 11 is the same as the pixel arrangement structure of the light-emitting board 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 board 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 board 2 is also a diamond arrangement. Of course, other arrangements are also possible, which are not described here one by one. This ensures that the display effect of the light-emitting board 2 is consistent with the display effect of the sub-display panel 11, avoiding a sense of screen fragmentation.

[0101] The ratio of the pixel density of the sub-display panel 11 to the pixel density of the light-emitting board 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 board 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 board 2, so as to ensure that the display effect of the light-emitting board 2 is consistent with the display effect of the sub-display panel 11, and avoid the sense of screen fragmentation.

[0102] 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.

[0103] In this example implementation, refer to Figure 3 and Figure 4 As shown, a gap is provided between two adjacent sub-display panels 11, and the connecting wire 28 of the light-emitting panel 2 passes through the gap and extends to the non-display side of the main display panel 1. The connecting wire 28 of the light-emitting panel 2 can be provided on a flexible circuit board. Moreover, 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, and a controller, a power supply, etc. can be electrically connected through the connector 29. The connecting wire 28 can include a power line and a signal line, etc.

[0104] Reference Figure 3 and Figure 4 As shown, the sub-display panel 11 may further include a front frame 4, which clamps the backlight module 111, the array substrate 112, the liquid crystal layer 113 and the color film substrate 114 together. The material of the front frame 4 may be metal or other materials with good heat dissipation. The light-emitting board 2 may be bonded and fixed to the front frame 4 by a thermally conductive adhesive, and the light-emitting board 2 may be cooled by the front frame 4.

[0105] In some other example embodiments of the present invention, reference is made to Figure 8 As shown, the gap between two adjacent sub-display panels 11 can be set 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 thermal 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 cooled by the bracket 5, that is, the bracket 5 can provide a heat dissipation channel for the light-emitting panel 2.

[0106] 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.

[0107] If the width of the bracket 5 is too narrow, it is inconvenient to install; if the width of the bracket 5 is too wide, it is necessary to set a wider light-emitting board 2, which makes the cost of the spliced ​​display module higher. The above numerical range is not only convenient for installation, but also does not increase the cost of the spliced ​​display module.

[0108] 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 .

[0109] In this example implementation, refer to Figure 3 , Figure 4 and Figure 8As shown, a cover plate 3 is provided on the light emitting side of the main display panel 1 and the light emitting board 2. Specifically, a cover plate 3 is provided on the light emitting side of the main display panel 1 and the light emitting board 2. The cover plate 3 can protect the main display panel 1 and the light emitting board 2, and can also eliminate the sense of screen fragmentation caused by the height difference between the main display panel 1 and the light emitting board 2.

[0110] The cover plate 3 has a first surface 31 and a second surface 32 which are 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 surface of the cover plate 3 close to the main display panel 1 is the second surface 32 , and the surface away from the main display panel 1 is the first surface 31 .

[0111] 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 .

[0112] 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 Fig. 9 – Fig.11 As shown, Fig. 9 is a schematic diagram of a dark band generated when the viewing angle is less than the maximum luminous angle a of the luminous panel 2, Fig.10 is a schematic diagram of a dark band generated when the viewing angle is equal to the maximum luminous angle a of the luminous panel 2, Fig.11 It 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 thickness of the light-emitting panel 2, and the wider the dark band, and the light intensity at the dark band is significantly reduced.

[0113] In this example implementation, refer to Figure 3 , Figure 4 and Figure 8 As shown, 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 arranged on the side of the display surface 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.

[0114] 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.

[0115] Reference Figure 12-Figure 15 As shown, the first part 3321 of the groove side wall 332 is divided for the convenience of explanation and is therefore represented by a dotted line in the figure. A light adjustment structure 34 is provided on the groove side wall 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. That is, the light propagation direction of the light can be changed by the light adjustment structure 34 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.

[0116] Reference Fig.12 and Fig.13 As shown, the light adjustment structure 34 can be a convex lens, referring to Fig.14 and Fig.15 As shown, the light adjustment structure 34 can 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.

[0117] The light adjustment structure 34 is a line along the groove sidewall 332 of the groove 33. When the light adjustment structure 34 is a convex lens, the light adjustment structure 34 is a protrusion extending along the groove sidewall 332 of the groove 33; when the light adjustment structure 34 is a Fresnel lens, the light adjustment structure 34 is a plurality of protrusions extending along the groove sidewall 332 of the groove 33. The light adjustment by the light adjustment structure 34 is consistent in the entire splicing non-display area PFA to ensure the display effect.

[0118] Specifically, refer to Figure 12-16 As shown, the groove 33 may include a groove side wall 332 and a groove bottom wall 331, the groove bottom wall 331 is a plane, and the groove bottom wall 331 is parallel to the display surface, and the groove side wall 332 intersects with the display surface. The groove 33 corresponds to the light-emitting board 2 one by one. Specifically, the number of the grooves 33 is the same as the number of the light-emitting board 2, and the shape of the groove 33 is the same as the shape of the light-emitting board 2. For example, when the light-emitting board 2 is set to a long straight line, the groove 33 is also set to a long straight line; when the light-emitting board 2 is set to a curved shape, the groove 33 is also set to a curved shape.

[0119] 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 at the normal viewing angle.

[0120] exist Fig.16 Only the first distance J1 between a point on the first part 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 the first part 3321, the distance between the first part 3321 and the light-emitting board 2 in the first direction X is the first distance J1, the distance between the first part 3321 and the sub-display panel 11 in the second direction Y is the second distance J2, and the first distance J1 decreases with the increase of the second distance J2, that is, at least part 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.

[0121] 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.

[0122] 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.

[0123] 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, and the second portion 3322 is 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 opposite sides.

[0124] 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 adjustment structure 34 and the side of the light emitting board 2, and a is the maximum light emitting angle of the light emitting board 2. The light emitted to the dark band passes through the light adjustment structure 34, that is, the maximum dark band passes through the light adjustment structure 34, so that the light adjustment structure 34 plays a role in light adjustment, refracting part of the light of the sub-display panel 11 and part of the light of the light emitting board 2 to the dark band and emitting, thereby increasing the light intensity at the dark band, reducing or even avoiding the generation of the dark band.

[0125] Of course, in some other example embodiments of the present disclosure, the groove 33 may not include the second portion 3322 , but only include the first portion 3321 .

[0126] Specifically, refer to Fig.16As shown, the width of the light-emitting board 2 is L, the maximum light-emitting angle of the light-emitting board 2 is a, the thickness of the light-emitting board 2 is I, that is, the distance between the display surface of the light-emitting board 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 part 3321 of the groove side wall 332 and the display surface of the main display panel 1 is b, the maximum distance between the light adjustment structure 34 and the side of the light-emitting board 2 is D; the maximum width of the dark band is H. In general, after the light-emitting board 2 is selected and determined, the parameters (L, a, I) of the light-emitting board 2 are all fixed values.

[0127] H=I*Sina, the maximum luminous angle a of the luminous plate 2 is a constant, therefore, the maximum width H of the dark band is proportional to the thickness I of the luminous plate 2 , and the maximum width H of the dark band can be reduced by reducing the thickness I of the luminous plate 2 .

[0128] In addition, in order to ensure that the light of the sub-display panel 11 can cover at least half of the dark band after being refracted, it is required that D≥H / 2; that is, the maximum distance D between the light adjustment structure 34 and the side of the light-emitting board 2 and the maximum width H of the dark band satisfy the relationship: D≥H / 2. In order to ensure that the light of the light-emitting board 2 can cover at least the other half of the dark bands on both sides of the light-emitting board 2 after being refracted, it is required that L≥H; that is, the width L of the light-emitting board 2 and the maximum width H of the dark band satisfy the relationship: L≥H.

[0129] Reference Fig.17 As shown, when the maximum light-emitting angle a of the light-emitting board 2 is 60°, the thickness I of the light-emitting board 2 is 0.6 mm, the maximum distance D between the light-adjusting structure 34 and the side of the light-emitting board 2 is 0.52 mm, the width L of the light-emitting board 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 unobvious at all viewing angles, and the display effect is optimal.

[0130] 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.

[0131] Reference Fig.18As shown, when the maximum luminous angle a of the luminous plate 2 is 60°, the thickness I of the luminous plate 2 is 0.8 mm, 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°, the width L of the luminous plate 2 is 5 mm, and the thickness T of the cover plate 3 is 6 mm; and at a viewing angle of 60°, the schematic diagram of the dark band elimination effect simulated by the software in four cases where the maximum distance D between the light adjustment structure 34 and the side of the luminous plate 2 is 0.1 mm, 0.2 mm, 0.3 mm, and 0.4 mm. It can be seen from the figure that when the maximum distance D between the light adjustment structure 34 and the side of the luminous plate 2 is 0.4 mm, the dark band is least obvious and the display effect is optimal. Moreover, the maximum width H of the dark band measured in this state is about 0.34 mm.

[0132] 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.

[0133] 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 may be 4.8 mm, 5 mm, 5.2 mm, etc. This arrangement ensures that the cover plate 3 can be processed and molded and ensures toughness and strength.

[0134] It should be noted that, refer to Fig.11 As shown, when the viewing angle exceeds the maximum luminous angle a of the light-emitting panel 2, the width of the dark band will change with the distance between the observer and the spliced ​​display module, and it is difficult to eliminate the dark band at this angle. Therefore, the technical solution disclosed in the present invention mainly eliminates the dark band when the viewing angle is less than or equal to the maximum luminous angle a of the light-emitting panel 2.

[0135] In this example implementation, 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 may 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, so as to reduce or even eliminate the color difference between the sub-display panel 11 and the light-emitting panel 2.

[0136] 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; the third sub-pixel 11c may be a blue sub-pixel, that is, the third sub-pixel 11c may emit blue light.

[0137] 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, i.e., the fourth sub-pixel 2a may emit red light; the fifth sub-pixel 2b may be a green sub-pixel, i.e., the fifth sub-pixel 2b may emit green light; the sixth sub-pixel 2c may be a blue sub-pixel, i.e., the sixth sub-pixel 2c may emit blue light.

[0138] The absolute value of the difference between the central wavelength of the first sub-pixel 11a and the central wavelength of the fourth sub-pixel 2a is less than or equal to 2 nanometers. For example, the absolute value of the difference between the central wavelength of the first sub-pixel 11a and the central wavelength of the fourth sub-pixel 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 central wavelength of the second sub-pixel 11b and the central wavelength of the fifth sub-pixel 2b is less than or equal to 2 nanometers. For example, the absolute value of the difference between the central wavelength of the second sub-pixel 11b and the central wavelength of the fifth sub-pixel 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.

[0139] Reference Fig.19 As shown, the central wavelength of the first sub-pixel 11a is about 590nm-620nm, and the central wavelength of the fourth sub-pixel 2a is also basically within this range; the central wavelength of the second sub-pixel 11b is about 530nm-550nm, and the central wavelength of the fifth sub-pixel 2b is also basically within this range; the central wavelength of the third sub-pixel 11c is about 445nm-455nm, and the central wavelength of the sixth sub-pixel 2c is also basically within this range. As a result, 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 just examples, and the range of the central wavelength of each sub-pixel will change with the display panel.

[0140] In some other exemplary embodiments of the present disclosure, the light-emitting board 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 disposed 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.

[0141] In some further example 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, that is, the first filter portion 1141a can only pass red light. The second filter portion 1141b may be a green filter portion, that is, the second filter portion 1141b can only pass green light. The third filter portion 1141c may be a blue filter portion, that is, the third filter portion 1141c can only pass blue light. The light-emitting plate 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, 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.

[0142] In this case, the absolute value of the difference between the central wavelength of the light that can be transmitted by the first filter part 1141a and the central wavelength of the light that can be 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 central wavelength of the light that passes through the first filter part 1141a and the central wavelength of the light that passes through the first filter layer 26a is less than or equal to 2 nanometers. The absolute value of the difference between the central wavelength of the light that can be transmitted by the second filter part 1141b and the central wavelength of the light that can be transmitted by the second filter layer 26b is less than or equal to 2 nanometers, so that the absolute value of the difference between the central wavelength of the light that passes through the second filter part 1141b and the central wavelength of the light that passes through the second filter layer 26b is less than or equal to 2 nanometers. The absolute value of the difference between the central wavelength of the light that can be transmitted by the third filter part 1141c and the central wavelength of the light that can be transmitted by the third filter layer 26c is less than or equal to 2 nanometers, so that the absolute value of the difference between the central wavelength of the light that passes through the third filter part 1141c and the central wavelength of the light that passes 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.

[0143] 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.

[0144] 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-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).

[0145] Based on the same inventive concept, an exemplary embodiment of the present disclosure provides a display device, which may include any of the above-mentioned spliced ​​display modules. The specific structure of the spliced ​​display module has been described in detail above, so it will not be repeated here.

[0146] The specific type of the display device is not particularly limited, and any display device type 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.

[0147] 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 according to the specific use requirements of the display device, which will not be repeated here.

[0148] Compared with the prior art, the beneficial effects of the display device provided by the exemplary embodiment of the present utility model are the same as the beneficial effects of the spliced ​​display module provided by the above exemplary embodiment, which will not be described in detail here.

[0149] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A splicing display module, characterized in that: 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 arranged on a side of the display surface 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, characterized in that: The splicing display module also includes: A cover plate is arranged on the light emitting sides of the main display panel and the light emitting board, the cover plate has a first surface and a second surface arranged opposite to each other, the second surface is closer to the main display panel than the first surface, the second surface is provided with a groove, the orthographic projection of the groove on the first reference plane overlaps with the orthographic projection of the light emitting board on the first reference plane, and a light adjustment structure is arranged on the groove side wall of the groove, the light adjustment structure is used to refract a part of the light of the sub-display panel and a part of the light of the light emitting board to a dark band and emit them.

3. The splicing display module according to claim 2, characterized in that: The light adjustment structure is a convex lens or a Fresnel lens.

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

6. The splicing display module according to claim 5, characterized in that: The height M of the second portion 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 board, and a is the maximum light-emitting angle of the light-emitting board.

7. The splicing display module according to claim 4, characterized in that: The bottom wall of the groove is arranged to be a plane parallel to the display surface.

8. The splicing display module according to claim 4, characterized in that: The maximum distance D between the light adjustment structure and the side of the light-emitting board and the maximum width H of the dark band satisfy the relationship: D≥H / 2; the width L of the light-emitting board and the maximum width H of the dark band satisfy the relationship: L≥H.

9. The splicing display module according to claim 8, characterized in that: 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.

10. The splicing display module according to claim 4, characterized in that: An included angle b between the first portion of the groove side wall 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, wherein a is a maximum light-emitting angle of the light-emitting panel.

11. The splicing display module according to claim 2, characterized in that: 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 splicing display module according to any one of claims 1 to 11, characterized in that: 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 splicing display module according to claim 12, characterized in that: 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 central wavelength of the first sub-pixel and a central wavelength of the fourth sub-pixel is less than or equal to 2 nanometers, an absolute value of a difference between a central wavelength of the second sub-pixel and a central wavelength of the fifth sub-pixel is less than or equal to 2 nanometers, and an absolute value of a difference between a central wavelength of the third sub-pixel and a central 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 arranged 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, 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 splicing display module according to any one of claims 1 to 11, characterized in that: 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 of the sub-display panels.

15. The splicing display module according to any one of claims 1 to 11, characterized in that: 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 splicing display module according to any one of claims 1 to 11, characterized in that: 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 splicing display module according to any one of claims 1 to 11, characterized in that: The light-emitting panel comprises: The routing layer includes multiple connecting routing lines; A base layer, disposed on one side of the routing layer, wherein the base layer is provided with a plurality of vias connected to the connection routing lines; A shielding layer, arranged on a side of the base layer away from the routing layer, and the shielding layer is 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 splicing display module according to claim 17, characterized in that: 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 light emitting colors of the first light emitting device, the second light emitting device and the third light emitting device are different or the same white; Alternatively, the multiple light-emitting devices are blue light-emitting devices or ultraviolet light-emitting devices, and the light-emitting board also includes multiple light excitation parts, and the multiple light excitation parts are arranged one by one on the light-emitting sides of the multiple light-emitting devices, and the multiple light excitation parts include a first light excitation part, a second light excitation part and a third light excitation part.

19. The splicing display module according to claim 18, characterized in that: The light-emitting panel may further include: A plurality of filter layers are arranged one by one on the light-emitting sides of a plurality of the light-emitting devices, or are arranged one by one on the light-emitting sides of a plurality of the light-excitation parts.

20. The splicing display module according to any one of claims 1 to 11, characterized in that: 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, characterized in that: A display module comprising any one of claims 1 to 20.

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