Display module and display device

Abstract

The utility model relates to the technical field of display, and discloses a display module and a display device. The display module comprises a display panel, a light guide plate and a shielding layer, the display panel comprises a reflecting layer; the light guide plate is arranged on the light emitting side of the display panel and comprises at least two sub light guide plates, and a splicing gap is formed between every two adjacent sub light guide plates; the shielding layer is arranged on the side, away from the display panel, of the light guide plate, and the orthographic projection of the shielding layer on the display panel and the orthographic projection of the splicing gap on the display panel are at least partially overlapped. The display module reduces or even avoids generation of obvious bright lines.

Description

Technical Field

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

[0002] At present, most outdoor display devices need to achieve 2000nit~3500nit to ensure that the display screen is clearly visible under sunlight, but this will cause the power consumption of the display module to be very high, which goes against the environmental trend of green environmental protection. Taking a 55-inch, 3500nit display device as an example, the light source is backlight, and the power consumption of the display module is about 400W. If an outdoor display device reflects and utilizes sunlight as the light source of the display device and eliminates the backlight light source, the power consumption of the display module can be greatly reduced. However, when there is no sunlight at night, a front light source is required to support the display brightness of the display module. Therefore, a front-light fully reflective RLCD (Reflective Liquid Crystal Display) is derived, and the power consumption can be reduced by about 80% compared to the backlight module.

[0003] Reference Figure 1 As shown, the light guide plate of the front light source is set on the display side of the display module. The current production line can produce light guide plates of up to 40 inches, which cannot meet the needs of large-sized display devices of 55 inches and 65 inches. Usually, a 55-inch display requires at least two light guide plates to be spliced, and a 65-inch display requires at least four light guide plates to be spliced. Figure 2 As shown, there is serious light leakage at the joints of the light guide plate, especially when viewed from a side angle, there are obvious bright lines, which affects the viewing of the picture.

[0004] 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

[0005] The purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art and to provide a display module and a display device.

[0006] According to one aspect of the present disclosure, there is provided a display module, comprising:

[0007] A display panel including a reflective layer;

[0008] A light guide plate, arranged at the light exiting side of the display panel, the light guide plate comprising at least two sub-light guide plates, with a splicing gap being arranged between two adjacent sub-light guide plates;

[0009] The shielding layer is arranged on a side of the light guide plate away from the display panel, and the orthographic projection of the shielding layer on the display panel at least partially overlaps with the orthographic projection of the splicing gap on the display panel.

[0010] In an exemplary embodiment of the present disclosure, the shielding layer is attached to a side of the light guide plate facing away from the display panel.

[0011] In an exemplary embodiment of the present disclosure, the orthographic projection of the blocking layer on the display panel covers the orthographic projection of the stitching gap on the display panel, and the orthographic projection area of ​​the blocking layer on the display panel is larger than the orthographic projection area of ​​the stitching gap on the display panel.

[0012] In an exemplary embodiment of the present disclosure, the length of the blocking layer in the first direction is greater than or equal to the length of the splicing gap in the first direction; the width of the blocking layer in the second direction is L, L≥2(t3×tanθ)+t2, wherein t2 is the width of the splicing gap in the second direction, t3 is the thickness of the light guide plate in the third direction, and θ is the critical angle of total reflection of the light guide plate; the first direction and the second direction are parallel to a side of the display panel on which the light guide plate is set, the first direction is an extension direction of the splicing gap, the second direction is perpendicular to the first direction, and the third direction is perpendicular to a side of the display panel on which the light guide plate is set.

[0013] In an exemplary embodiment of the present disclosure, the roughness of the end face of the sub-light guide plate close to the splicing gap is less than or equal to 0.2 nm, and the edge line of the orthographic projection of the shielding layer on the display panel coincides with the edge line of the orthographic projection of the splicing gap on the display panel.

[0014] In an exemplary embodiment of the present disclosure, the display module further includes:

[0015] The cover plate is arranged on the side of the shielding layer away from the display panel, and a gap is arranged between the cover plate and the light guide plate; the shielding layer is attached to the side of the cover plate close to the display panel.

[0016] In an exemplary embodiment of the present disclosure, the orthographic projection of the blocking layer on the display panel covers the orthographic projection of the stitching gap on the display panel, and the orthographic projection area of ​​the blocking layer on the display panel is larger than the orthographic projection area of ​​the stitching gap on the display panel.

[0017] In an exemplary embodiment of the present disclosure, the length of the shielding layer in the first direction is greater than or equal to the length of the splicing gap in the first direction; the width of the shielding layer in the second direction is L, L≥2[(t3×tanθ / 2)+t4×sinθ / 2×n light guide plate / n air]+t2, wherein t2 is the width of the splicing gap in the second direction, t3 is the thickness of the light guide plate in the third direction, t4 is the thickness of the gap between the cover plate and the light guide plate in the third direction, θ is the critical angle of total reflection of the light guide plate, and n 导光板 is the refractive index of the light guide plate, n 空气 is the refractive index of air; the first direction and the second direction are parallel to the side of the display panel on which the light guide plate is set, the first direction is the extension direction of the splicing gap, the second direction is perpendicular to the first direction, and the third direction is perpendicular to the side of the display panel on which the light guide plate is set.

[0018] In an exemplary embodiment of the present disclosure, the length of the shielding layer in the first direction is greater than or equal to the length of the splicing gap in the first direction; the roughness of the end face of the sub-light guide plate close to the splicing gap is less than or equal to 0.2nm, and the width of the shielding layer in the second direction is L, L≥t2(t4+t3 / 2) / t3 / 2, wherein t2 is the width of the splicing gap in the second direction, t3 is the thickness of the light guide plate in the third direction, and t4 is the thickness of the gap between the cover plate and the light guide plate in the third direction; the first direction and the second direction are parallel to a side of the display panel on which the light guide plate is set, the first direction is an extension direction of the splicing gap, the second direction is perpendicular to the first direction, and the third direction is perpendicular to a side of the display panel on which the light guide plate is set.

[0019] In an exemplary embodiment of the present disclosure, the display panel includes a second display area and at least two first display areas, the second display area is located between two adjacent first display areas, the first display area is configured for normal display, the second display area is configured to display black, and the orthographic projection of the shielding layer on the display panel is located within the second display area.

[0020] In an exemplary embodiment of the present disclosure, the width of the second display area in the second direction is greater than or equal to the first width and less than or equal to the second width, the first width is the width of the positive projection of the blocking layer on the display panel, and the second width is the width of the projection of the blocking layer on the display panel at a viewing angle of 45 degrees.

[0021] In an exemplary embodiment of the present disclosure, display images of at least two of the first display areas are continuous.

[0022] In an exemplary embodiment of the present disclosure, the shielding layer is a black foam structure and / or a black silk-screen structure.

[0023] In an exemplary embodiment of the present disclosure, the display module further includes:

[0024] The adhesive layer is arranged in the joint gap.

[0025] In an exemplary embodiment of the present disclosure, the ratio of the refractive index of the adhesive layer to the refractive index of the sub-light guide plate is greater than or equal to 0.95 and less than or equal to 1.05.

[0026] According to another aspect of the present disclosure, a display device is provided, comprising: a display module as described in any one of the above.

[0027] In the display module disclosed in the present invention, the orthographic projection of the shielding layer on the display panel at least partially overlaps with the orthographic projection of the splicing gap on the display panel. The shielding layer can block at least part of the light leakage of the light guide plate at the splicing gap, thereby reducing or even avoiding the display module from producing obvious bright lines and avoiding affecting the viewing of the picture.

[0028] 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

[0029] 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.

[0030] Figure 1 It is a structural schematic diagram of a display module in the related technology.

[0031] Figure 2 This is a display effect diagram of a display module in the related technology.

[0032] Figure 3 It is a schematic diagram of the structure of the display panel in the display module of the present disclosure.

[0033] Figure 4 It is a schematic structural diagram of a first exemplary implementation of a display module disclosed herein.

[0034] Figure 5 for Figure 4 Schematic diagram of the optical path principle of the shielding layer set in .

[0035] Figure 6 for Figure 5 Schematic top view of the cooperation between the middle shielding layer and the light guide plate.

[0036] Figure 7 Schematic diagram of the optical path principle of the shielding layer provided in the second exemplary embodiment of the display module disclosed herein.

[0037] Figure 8 The diagram is a top view of an exemplary embodiment of partitioning of a display panel in a display module disclosed herein and cooperation between the display panel and a shielding layer.

[0038] Fig. 9 The diagram is a structural diagram of an exemplary implementation of the partitioning of the display panel in the display module disclosed herein and the cooperation between the display panel and the shielding layer.

[0039] Fig.10 A schematic diagram of the display effect of the display module with the second display area set.

[0040] Fig.11 It is a structural schematic diagram of a third exemplary implementation of the display module disclosed in the present invention.

[0041] Fig.12 for Fig.11 Schematic diagram of the optical path principle of the shielding layer set in .

[0042] Fig.13 Schematic diagram of the optical path principle of the shielding layer provided in the fourth exemplary embodiment of the display module of the present disclosure.

[0043] Fig.14 It is a structural schematic diagram of another exemplary implementation of the partitioning of the display panel in the display module disclosed herein and the cooperation between the display panel and the shielding layer.

[0044] Fig.15 FIG. 1 is a schematic structural diagram of another exemplary embodiment of a light guide plate of a display module disclosed herein.

[0045] Fig.16 The figure is a schematic structural diagram of another exemplary implementation of a light guide plate of a display module in the related art.

[0046] Description of reference numerals:

[0047] 1. display panel; 11. array substrate; 12. reflective layer; 13. liquid crystal layer; 14. color filter substrate; 141. filter unit; 141a. first filter unit; 141b. second filter unit; 141c. third filter unit; 15. polarizer; 16. sub-pixel; AA1. first display area; AA2. second display area;

[0048] 2. Optical glue;

[0049] 3. Light guide plate; 3a. Light incident surface; 3b. Light emitting surface; 3c. Backlight surface; 3c1. Light guide microstructure; 31. Sub-light guide plate; 31a. End surface; 32. Joint gap; 33. Adhesive layer;

[0050] 4. Gap; 5. Shielding layer; 6. Front light source; 7. Frame; 8. Cover plate;

[0051] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0052] 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.

[0053] 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.

[0054] 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.

[0055] In this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. "And / or" is just a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0056] The exemplary embodiment of the present disclosure provides a display module, referring to Figure 3-Figure 15 As shown, the display module may include a display panel 1, a light guide plate 3 and a shielding layer 5; the display panel 1 may include a reflective layer 12; the light guide plate 3 is arranged on the light output side of the display panel 1, the light guide plate 3 includes at least two sub-light guide plates 31, and a splicing gap 32 is arranged between two adjacent sub-light guide plates 31; the shielding layer 5 is arranged on the side of the light guide plate 3 away from the display panel 1, and the orthographic projection of the shielding layer 5 on the display panel 1 and the orthographic projection of the splicing gap 32 on the display panel 1 at least partially overlap.

[0057] The display module disclosed in the present invention can shield at least part of the light leakage of the light guide plate 3 at the joint seam through the shielding layer 5, thereby reducing or even avoiding the generation of obvious bright lines in the display module and avoiding affecting the viewing of the picture.

[0058] In this example implementation, refer to Figure 1 and Figure 3 As shown, the display panel 1 may be a liquid crystal display panel 1, and the display panel 1 may include an array substrate 11, a reflective layer 12, a liquid crystal layer 13, and a color filter substrate 14; the reflective layer 12 is disposed on one side of the array substrate 11, the liquid crystal layer 13 is disposed on the side of the reflective layer 12 away from the array substrate 11, and the color filter substrate 14 is disposed on the side of the liquid crystal layer 13 away from the array substrate 11. The reflective layer 12 can reflect the light incident on the display panel 1, and realize the picture display through the liquid crystal layer 13.

[0059] The color filter substrate 14 may include a plurality of filter sections 141 and a black matrix, wherein a plurality of openings are provided on the black matrix, and the plurality of filter sections 141 are provided in the openings one by one. The plurality of filter sections 141 may include a first filter section 141a, a second filter section 141b, and a third filter section 141c. The first filter section 141a may be a red filter section, i.e., the first filter section 141a can only pass red light. The second filter section 141b may be a green filter section, i.e., the second filter section 141b can only pass green light. The third filter section 141c may be a blue filter section, i.e., the third filter section 141c can only pass blue light. One filter section 141 forms one sub-pixel 16 of the sub-display panel 1, for example, one first filter section 141a forms one first sub-pixel, one second filter section 141b forms one second sub-pixel, and one third filter section 141c forms one third sub-pixel. The first sub-pixel may be a red sub-pixel, that is, the first sub-pixel may emit red light; the second sub-pixel may be a green sub-pixel, that is, the second sub-pixel may emit green light; the third sub-pixel may be a blue sub-pixel, that is, the third sub-pixel may emit blue light. Of course, the plurality of filter sections 141 may further include a fourth filter section, and the fourth filter section may be a white filter section, that is, the fourth filter section may pass white light.

[0060] In this example implementation, refer to Figure 1 , Figure 4 and Fig.11 As shown, the light guide plate 3 is disposed on the light emitting side of the display panel 1 . Specifically, the light guide plate 3 is bonded to the side of the color filter substrate 14 away from the array substrate 11 through an OCA (Optically Clear Adhesive) optical adhesive 2 .

[0061] The light guide plate 3 has a light incident surface 3a, a light emitting surface 3b and a backlight surface 3c, the backlight surface 3c is arranged opposite to the light emitting surface 3b, the light emitting surface 3b is a side of the light guide plate 3 close to the display panel 1, and the backlight surface 3c is a side of the light guide plate 3 away from the display panel 1. The light incident surface 3a can be arranged substantially perpendicular to the light emitting surface 3b and the backlight surface 3c.

[0062] When the light guide plate 3 is set to a rectangular shape, the light guide plate 3 is provided with four side surfaces. Moreover, a front light source 6 is provided on at least one side surface of the light guide plate 3, that is, at least one of the four side surfaces of the light guide plate 3 is a light incident surface 3a. For example, a front light source 6 may be provided on one side surface of the light guide plate 3, or on two opposite side surfaces of the light guide plate 3, or on all four side surfaces of the light guide plate 3. The front light source 6 may be an LED (Light-Emitting Diode), a Mini LED (Mini-Light-Emitting Diode), or a Micro LED (Micro-Light-Emitting Diode), etc. The light guide plate 3 can convert the line light source emitted by the front light source 6 into a surface light source.

[0063] A plurality of light-guiding microstructures 3c1 are provided on the backlight surface 3c. The light-guiding microstructures 3c1 can modulate the light irradiated thereon, so that the small-angle light is deflected to a large angle, making the light of the front light source 6 more divergent, thereby improving the light mixing effect of the front light source 6 and ensuring that more than 70% of the light is emitted from the light-emitting surface 3b.

[0064] Reference Figure 4 and Fig.11 As shown, the light guide plate 3 may include at least two sub-light guide plates 31, for example, the light guide plate 3 may include two sub-light guide plates 31, or the light guide plate 3 may include four sub-light guide plates 31. Of course, depending on the shape of the light guide plates 3 to be spliced, the light guide plate 3 may also include three or five sub-light guide plates 31. The number of sub-light guide plates 31 that may be included in the above-mentioned light guide plate 3 is only an example and does not constitute a limitation of the present disclosure.

[0065] A joint gap 32 is provided between two adjacent sub-light guide plates 31; the shapes and sizes of at least two sub-light guide plates 31 can be the same or different. Both sub-light guide plates 31 are bonded to the side of the color filter substrate 14 away from the array substrate 11 by OCA (Optically Clear Adhesive) optical glue 2.

[0066] In order to facilitate splicing, the sub-light guide plate 31 is generally set to a rectangular shape, so the splicing gap 32 is generally a long straight line. Of course, in some exemplary embodiments, the sub-light guide plate 31 can also choose 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 gap 32 is also a long straight line, but it is inclined; the edge line of the sub-light guide plate 31 can also be a curve, in which case, the splicing gap 32 is curved.

[0067] In this example implementation, refer to Figure 4 and Fig.11 As shown, a shielding layer 5 is provided on the side of the light guide plate 3 facing away from the display panel 1, and the orthographic projection of the shielding layer 5 on the display panel 1 at least partially overlaps with the orthographic projection of the splicing gap 32 on the display panel 1. For example, the edge line of the orthographic projection of the shielding layer 5 on the display panel 1 may coincide with the edge line of the orthographic projection of the splicing gap 32 on the display panel 1, or the orthographic projection of the shielding layer 5 on the display panel 1 may cover and be larger than the orthographic projection of the splicing gap 32 on the display panel 1. In both cases, the orthographic projection of the shielding layer 5 on the display panel 1 completely covers the orthographic projection of the splicing gap 32 on the display panel 1; therefore, the shape of the shielding layer 5 may be the same as the shape of the splicing gap 32; for example, when the splicing gap 32 is set to be in the shape of a long straight line, the shielding layer 5 is also set to be in the shape of a long straight line; when the splicing gap 32 is set to be in a curved shape, the shielding layer 5 may be set to be in a curved shape or in a straight line.

[0068] Of course, in some other exemplary embodiments of the present disclosure, a portion of the orthographic projection of the shielding layer 5 on the first reference plane may overlap with a portion of the orthographic projection of the stitching gap 32 on the first reference plane.

[0069] The shielding layer 5 can shield at least part of the light leakage of the light guide plate 3 at the joint seam, thereby reducing or even avoiding the generation of obvious bright lines in the display module and avoiding affecting the viewing of the picture.

[0070] In this example implementation, refer to Figure 4 and Fig.11As shown, the display module may further include a cover plate 8, which is disposed on the side of the shielding layer 5 away from the display panel 1. Specifically, the cover plate 8 is bonded to the side of the light guide plate 3 away from the display panel 1 through a glue frame 7. The glue frame 7 has a certain thickness, so that a gap 4 is provided between the cover plate 8 and the light guide plate 3; the entire display module can be protected by the cover plate 8.

[0071] Reference Figure 4 As shown, in some exemplary embodiments of the present disclosure, no adhesive layer 33 is provided in the splicing gap 32, that is, the splicing gap 32 forms an air gap. At least two sub-light guide plates 31 are bonded to the side of the color filter substrate 14 away from the array substrate 11 by OCA (Optically Clear Adhesive) optical adhesive 2 alone. The risk of easy debonding between the light guide plate 31 and the display panel 1 and between two adjacent sub-light guide plates 31 due to the excessive area of ​​the light guide plate 3 formed by at least two sub-light guide plates 31 is avoided.

[0072] The shielding layer 5 is attached to the side of the light guide plate 3 facing away from the display panel 1 , so that the shielding layer 5 and the light guide plate 3 are tightly attached without forming a gap, while a gap may be formed between the shielding layer 5 and the cover plate 8 .

[0073] Moreover, the orthographic projection of the shielding layer 5 on the display panel 1 covers the orthographic projection of the splicing gap 32 on the display panel 1, and the orthographic projection area of ​​the shielding layer 5 on the display panel 1 is larger than the orthographic projection area of ​​the splicing gap 32 on the display panel 1. Thus, the orthographic projection of the shielding layer 5 on the display panel 1 completely covers the orthographic projection of the splicing gap 32 on the display panel 1.

[0074] The shielding layer 5 may be a black foam structure. In this case, the shielding layer 5 may be adhered to a side of the light guide plate 3 facing away from the display panel 1 .

[0075] In some other exemplary embodiments of the present disclosure, the shielding layer 5 may include a black silk-screen structure and a black foam structure. The black silk-screen structure is formed on a side of the light guide plate 3 facing away from the display panel 1 by silk-screen printing, but since the joint gap 32 forms an air gap, the black silk-screen structure cannot be formed by silk-screen printing, so the black foam structure is provided at a position opposite to the joint gap 32.

[0076] Therefore, lamination not only includes bonding, but also includes structures directly formed by processes such as printing and coating. Lamination mainly reflects that no gap is formed between the shielding layer 5 and the light guide plate 3.

[0077] The critical angle θ of total reflection of the light guide plate 3 is closely related to the material of the light guide plate 3. When the material of the light guide plate 3 is glass, the critical angle θ of total reflection of the light guide plate 3 is approximately 42°. When the material of the light guide plate 3 is PMMA (PolymethylMethacrylate) or PC (Polycarbonate), the critical angle θ of total reflection of the light guide plate 3 is greater than or equal to 37° and less than or equal to 45°. Of course, the above-mentioned materials of the light guide plate 3 and the values ​​of the critical angle θ of total reflection are all examples, and the material of the light guide plate 3 can also be other materials, and the critical angle θ of total reflection will also be different, which will not be explained one by one here.

[0078] The principle of generating bright lines is described below by taking the light guide plate 3 made of glass as an example.

[0079] Reference Figure 5 As shown, the dotted arrow in the figure indicates the light that generates the bright line. Since it is blocked by the shielding layer 5 and cannot be emitted, it is indicated by a dotted line. The end surface 31a of the sub-light guide plate 31 close to the splicing gap 32 has partial diffuse reflection. The diffuse reflection will generate light in any direction. A part of the light in any direction directly emits from the splicing gap 32 to generate a bright line, and another part of the light in any direction will be injected into the sub-light guide plate 31. When the incident angle α of the light is greater than or equal to the critical angle θ of total reflection of the sub-light guide plate 31 (for example, 42°), the light is totally reflected inside the sub-light guide plate 31 and cannot be emitted, and no bright line will be generated; when the incident angle of the light is less than the critical angle θ of total reflection of the light guide plate 3 (for example, 42°), the light is emitted, and the human eye can observe the bright line from the side angle. Moreover, the width of the bright line generated by the light that enters the light guide plate 3 from the end surface 31a of the sub-light guide plate 31 close to the display panel 1 is the largest.

[0080] Therefore, refer to Figure 6 As shown in the figure, the edge line of the splicing gap 32 is blocked by the shielding layer 5 and is therefore represented by a dotted line. The length of the shielding layer 5 in the first direction X is greater than or equal to the length of the splicing gap 32 in the first direction X.

[0081] Reference Figure 5As shown, the width of a portion of the shielding layer 5 located on a sub-light guide plate 31 in the second direction Y is a, a=t3×tanθ, the width of the shielding layer 5 in the second direction Y is L, and the width of the shielding layer 5 in the second direction Y is L=2a+t2, therefore, L≥2(t3×tanθ)+t2, wherein t2 is the width of the splicing gap 32 in the second direction Y, and the width t2 of the splicing gap 32 in the second direction Y is less than or equal to 1 mm. For example, the splicing gap 32 in the second direction Y is The width t2 in direction Y can be 0.2mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, etc.; t3 is the thickness of the light guide plate 3 in the third direction Z, and the thickness t3 of the light guide plate 3 in the third direction Z is greater than or equal to 0.5mm and less than or equal to 1.5mm. For example, the thickness t3 of the light guide plate 3 in the third direction Z can be 0.6mm, 0.8mm, 1mm, 1.2mm, 1.4mm, etc.; θ is the critical angle of total reflection of the light guide plate 3.

[0082] With such arrangement, the shielding layer 5 can shield almost all the light leakage generated by the light guide plate 3 at the joint gap 32 and at both sides of the joint gap 32 , thereby avoiding the generation of bright lines.

[0083] It should be noted that in the present disclosure, the first direction X and the second direction Y are parallel to the side of the display panel 1 on which the light guide plate 33 is set, the first direction X is the extension direction of the splicing gap 32, the first direction X is the length direction of the splicing gap 32, the second direction Y is perpendicular to the first direction X, the third direction Z is perpendicular to the side of the display panel on which the light guide plate is set, and the third direction Z is perpendicular to both the first direction X and the second direction Y.

[0084] Alternatively, refer to Figure 7 As shown, the roughness of the end face 31a of the sub-light guide plate 31 close to the splicing gap 32 is less than or equal to 0.2nm. For example, the roughness of the end face 31a of the sub-light guide plate 31 close to the splicing gap 32 can be 0.02nm, 0.05nm, 0.07nm, 0.1nm, 0.13nm, 0.15nm, 0.18nm, etc.

[0085] The roughness of the end surface 31a of the sub-light guide plate 31 close to the joint gap 32 is set to be relatively small, so that the end surface 31a of the sub-light guide plate 31 close to the joint gap 32 almost forms a mirror surface, and almost no diffuse reflection occurs at the end surface 31a of the sub-light guide plate 31 close to the joint gap 32. For example, the end surface 31a of the sub-light guide plate 31 close to the joint gap 32 can be polished so that the roughness of the end surface 31a of the sub-light guide plate 31 close to the joint gap 32 is less than or equal to 0.2nm.

[0086] In this case, generally, the light entering the joint gap 32 from the display panel 1 will produce a bright line; and the light entering the joint gap 32 from the display panel 1 and then entering the sub-light guide plate 31 through the end surface 31a of the sub-light guide plate 31 close to the joint gap 32 is almost completely reflected and will not be emitted, and no bright line will be produced. The specific principle is as follows:

[0087]

[0088]

[0089] α3=90°-α2,

[0090] In the formula, α1 is the maximum incident angle of the light on the end face 31a of the sub-light guide plate 31 close to the splicing gap 32, α2 is the refraction angle of the light with the maximum incident angle after entering the sub-light guide plate 31, which is the maximum refraction angle. The incident angle of the light with the maximum refraction angle to the side of the sub-light guide plate 31 close to the display panel is α3, t2 is the width of the splicing gap 32 in the second direction Y, t3 is the thickness of the light guide plate 3 in the third direction Z, and nlight guide plate is the refractive index of the light guide plate 3.

[0091] When α1 and α2 are at their maximum values, α3 is at its minimum value, and the calculated minimum value of α3 is approximately 52°, which is greater than the critical angle θ of total reflection of the light guide plate 3. Therefore, total reflection will occur. The incident angle α3 at other positions will be greater than the minimum value of 52°, and total reflection will inevitably occur.

[0092] Therefore, in this case, the edge line of the orthographic projection of the shielding layer 5 on the display panel 1 coincides with the edge line of the orthographic projection of the joint gap 32 on the display panel 1, so that the shielding layer 5 can almost completely block the light leakage generated by the light guide plate 3 in the joint gap 32, thereby avoiding the generation of bright lines; and relative to Figure 5 The exemplary embodiment shown allows the width L of the shielding layer 5 in the second direction Y to be reduced. Of course, in order to connect the shielding layer 5 to the light guide plate 3 , the width L of the shielding layer 5 in the second direction Y may be set wider.

[0093] Alternatively, refer to Figure 8As shown in the figure, since the second display area AA2 is an artificially divided area, the edge line of the second display area AA2 is indicated by a dotted line. The display panel 1 may include the second display area AA2 and at least two first display areas AA1. For example, the display panel 1 may include two first display areas AA1 and one second display area AA2, and the second display area AA2 is located between the two first display areas AA1. The display panel 1 may also include four first display areas AA1 and two second display areas AA2, and the two second display areas AA2 cross to form a "cross" shape. The four first display areas AA1 are located one by one in the four areas formed by the division of the two second display areas AA2, so that a second display area AA2 is provided between two adjacent first display areas AA1. Of course, the number of the second display areas AA2 and the first display areas AA1 included in the display panel 1 may also be other numbers, which are not described one by one here.

[0094] Moreover, the number of the first display areas AA1 and the second display areas AA2 included in the display panel 1 corresponds to the number of the sub-light guide plates 31 included in the light guide plate 3. For example, in the case where the light guide plate 3 includes two sub-light guide plates 31, the display panel 1 may include two first display areas AA1 and one second display area AA2, and the second display area AA2 is located between the two first display areas AA1; in the case where the light guide plate 3 includes four sub-light guide plates 31, the display panel 1 may also include four first display areas AA1 and two second display areas AA2, and the two second display areas AA2 are crossed to form a "cross" shape, and the four first display areas AA1 are located one by one in the four areas formed by the division of the two second display areas AA2.

[0095] The first display area AA1 is configured to display normally, and the second display area AA2 is configured to display black. The orthographic projection of the shielding layer 5 on the display panel 1 is located within the second display area AA2, that is, the shielding layer 5 at least shields a portion of the second display area AA2, and the portion shielded by the shielding layer 5 cannot view the display image, and the portion not shielded by the shielding layer 5 can view the display image. Therefore, the first display area AA1 not shielded by the shielding layer 5 is configured to display normally to ensure the normal display of the display module; the second display area AA2 shielded by the shielding layer 5 is configured to display black to reduce power consumption.

[0096] The width of the second display area AA2 in the second direction Y is greater than or equal to the first width and less than or equal to the second width. The first width is the width of the orthographic projection of the shielding layer 5 on the display panel 1 , or the first width is the width of the shielding layer 5 in the second direction Y.

[0097] Reference Fig. 9As shown, since the viewing angle of the display module is generally within the range of less than 45 degrees, if simply calculated, the second width K can be the width of the projection of the shielding layer 5 on the display panel 1 at a 45-degree viewing angle. Specifically, the second width K = L + 2 * (t3 + t5), where L is the width of the shielding layer 5 in the second direction Y, t3 is the thickness of the light guide plate 3 in the third direction Z, and t5 is the thickness of the shielding layer 5 in the third direction Z. In the case where the shielding layer 5 is a black silk-screen structure, t5 can be ignored, that is, the value of t5 can be recorded as zero. Of course, the specific calculation formula of the second width will be different according to the different viewing angles of the display module, which will not be explained here one by one.

[0098] It should also be noted that the width of the second display area AA2 in the second direction Y is also related to the refractive index and thickness of the cover plate 8, the refractive index and thickness of the light guide plate 3, and the thickness of the gap 4. The influence of the refractive index and thickness of the cover plate 8, the refractive index and thickness of the light guide plate 3, and the thickness of the gap 4 is ignored here; of course, in some other example implementations of the present disclosure, the above factors can also be taken into consideration and accurately calculated.

[0099] For example, in some exemplary embodiments, the width L of the shielding layer 5 in the second direction Y is 3mm. When the display module is viewed at a 45° incident angle, the width of the corresponding shielded display panel 1 is 5.9mm-6.4mm, and the size of the sub-pixel 16 of the 55-inch display panel 1 is about 0.63mm. Therefore, the number of shielded sub-pixels 16 is about 9-10, that is, the width of the second display area AA2 in the second direction Y occupies about 9-10 sub-pixels 16. Therefore, when displaying the picture, the shielded area in the middle can be inserted as black, that is, the second display area AA2 is configured to display black. For the actual display effect, refer to Fig.10 shown.

[0100] Moreover, according to Fig.10 As shown, the display images of at least two first display areas AA1 are continuous, that is, the image to be displayed on the display panel 1 is divided into at least two parts, and black is inserted between the two adjacent parts, so that the display images on the opposite sides of the second display area AA2 are continuous, thereby ensuring the continuity of the display effect; instead of replacing a part of the display image with the black display of the second display area AA2.

[0101] Reference Fig.11 As shown, in some other example embodiments of the present disclosure, the shielding layer 5 is attached to a side of the cover plate 8 close to the display panel 1, so that the shielding layer 5 and the cover plate 8 are tightly fitted without forming a gap, while a gap may be formed between the shielding layer 5 and the light guide plate 3.

[0102] Moreover, the orthographic projection of the shielding layer 5 on the display panel 1 covers the orthographic projection of the splicing gap 32 on the display panel 1, and the orthographic projection area of ​​the shielding layer 5 on the display panel 1 is larger than the orthographic projection area of ​​the splicing gap 32 on the display panel 1. Thus, the orthographic projection of the shielding layer 5 on the display panel 1 completely covers the orthographic projection of the splicing gap 32 on the display panel 1.

[0103] The shielding layer 5 may be a black silk-screen structure, which is formed by screen printing on the side of the cover plate 8 close to the display panel 1. The shielding layer 5 may also be a black foam structure, in which case the shielding layer 5 may be bonded to the side of the cover plate 8 close to the display panel 1.

[0104] In some other exemplary embodiments of the present disclosure, the shielding layer 5 may include a black silk-screen structure and a black foam structure. For example, the black foam structure may be provided at the middle portion of the shielding layer 5 in the second direction Y, and the black silk-screen structure may be provided at both side portions of the shielding layer 5 in the second direction Y. Of course, other arrangement structures are also possible, which are not described one by one here.

[0105] Therefore, lamination not only includes bonding, but also includes structures directly formed by processes such as printing and coating. Lamination mainly reflects that no gap is formed between the shielding layer 5 and the cover plate 8.

[0106] The principle of bright lines generated by display modules Figure 4 The principle is the same as in , so it will not be repeated here.

[0107] Reference Figure 6 As shown, in this exemplary embodiment, the length of the shielding layer 5 in the first direction X is greater than or equal to the length of the splicing gap 32 in the first direction X.

[0108] Reference Fig.12 As shown, it is found through experiments that the light intensity of the light generating the bright line is attenuated to 40% when the incident angle is greater than θ / 2, and the bright line is not obvious at the side viewing angle; when the incident angle of the light generating the bright line is less than or equal to θ / 2, the bright line at the side viewing angle can be observed, and θ is the critical angle of total reflection of the light guide plate 3. Therefore, in general, the generation of the bright line can be reduced or even avoided by only blocking the light with an incident angle less than or equal to θ / 2.

[0109] The distance between the incident point of the light with an incident angle of θ / 2 and the end surface 31a of the sub-light guide plate 31 in the second direction is b, b=t3×tanθ / 2. The width of the portion of the shielding layer 5 directly opposite to a sub-light guide plate 31 in the second direction Y is a, a=b+t4, which can be reduced in two directions; wherein α is the exit angle of the light with an incident angle of θ / 2, and α needs to satisfy:

[0110]

[0111] Wherein, nair is the refractive index of air, which is generally 1; nlp is the refractive index of the light guide plate.

[0112] The width of the blocking layer 5 in the second direction Y is L, L≥2a+t2, therefore, it can be obtained: L≥2[(t3×tanθ / 2)+(t4×sinα)]+t2, wherein t2 is the width of the splicing gap 32 in the second direction Y, t3 is the thickness of the light guide plate 3 in the third direction Z, t4 is the thickness of the gap 4 between the cover plate 8 and the light guide plate 3 in the third direction Z, and θ is the critical angle of total reflection of the light guide plate 3.

[0113] Such arrangement also enables the shielding layer 5 to almost completely shield the light leakage generated by the light guide plate 3 at the joint gap 32 and at both sides of the joint gap 32, thereby avoiding the generation of bright lines.

[0114] Alternatively, refer to Fig.13 As shown, the roughness of the end face 31a of the sub-light guide plate 31 close to the splicing gap 32 is less than or equal to 0.2nm. For example, the roughness of the end face 31a of the sub-light guide plate 31 close to the splicing gap 32 can be 0.02nm, 0.05nm, 0.07nm, 0.1nm, 0.13nm, 0.15nm, 0.18nm, etc.

[0115] The roughness of the end surface 31a of the sub-light guide plate 31 close to the joint gap 32 is set to be relatively small, so that the end surface 31a of the sub-light guide plate 31 close to the joint gap 32 almost forms a mirror surface, and almost no diffuse reflection occurs at the end surface 31a of the sub-light guide plate 31 close to the joint gap 32. For example, the end surface 31a of the sub-light guide plate 31 close to the joint gap 32 can be polished so that the roughness of the end surface 31a of the sub-light guide plate 31 close to the joint gap 32 is less than or equal to 0.2nm.

[0116] In this case, refer to Figure 7 As shown, generally, the light entering the joint gap 32 from the display panel 1 will produce bright lines; and the light entering the joint gap 32 from the display panel 1 and then entering the sub-light guide plate 31 through the end surface 31a of the sub-light guide plate 31 close to the joint gap 32 will almost all be totally reflected and will not be emitted, and will not produce bright lines. The specific principle is as follows:

[0117]

[0118]

[0119] α3=90°-α2,

[0120] In the formula, α1 is the maximum incident angle of the light on the end face 31a of the sub-light guide plate 31 close to the splicing gap 32, α2 is the refraction angle of the light with the maximum incident angle after entering the sub-light guide plate 31, which is the maximum refraction angle. The incident angle of the light with the maximum refraction angle to the side of the sub-light guide plate 31 close to the display panel is α3, t2 is the width of the splicing gap 32 in the second direction Y, t3 is the thickness of the light guide plate 3 in the third direction Z, and nlight guide plate is the refractive index of the light guide plate 3.

[0121] When α1 and α2 are at their maximum values, α3 is at its minimum value, and the calculated minimum value of α3 is approximately 52°, which is greater than the critical angle θ of total reflection of the light guide plate 3. Therefore, total reflection will occur. The incident angle α3 at other positions will be greater than the minimum value of 52°, and total reflection will inevitably occur.

[0122] Therefore, refer to Fig.13 As shown, in this case, the width L of the shielding layer 5 in the second direction Y needs to satisfy:

[0123] L ≥ t2(t4+t3 / 2) / t3 / 2,

[0124] Among them, t2 is the width of the joint gap 32 in the second direction Y, t3 is the thickness of the light guide plate 3 in the third direction Z, t4 is the thickness of the gap 4 between the cover plate 8 and the light guide plate 3 in the third direction Z, and the thickness t4 of the gap 4 between the cover plate 8 and the light guide plate 3 in the third direction Z is greater than or equal to 0.5mm and less than or equal to 1.5mm. For example, the thickness t4 of the gap 4 between the cover plate 8 and the light guide plate 3 in the third direction Z can be 0.6mm, 0.8mm, 1mm, 1.2mm, 1.4mm, etc. The shielding layer 5 can almost completely block the light leakage generated by the light guide plate 3 in the joint gap 32, thereby avoiding the generation of bright lines; and relative to Fig.12 The illustrated exemplary embodiment allows the width L of the shielding layer 5 in the second direction Y to be reduced.

[0125] Alternatively, refer to Figure 8As shown in the figure, since the second display area AA2 is an artificially divided area, the edge line of the second display area AA2 is indicated by a dotted line. The display panel 1 may include the second display area AA2 and at least two first display areas AA1. For example, the display panel 1 may include two first display areas AA1 and one second display area AA2, and the second display area AA2 is located between the two first display areas AA1. The display panel 1 may also include four first display areas AA1 and two second display areas AA2, and the two second display areas AA2 cross to form a "cross" shape. The four first display areas AA1 are located one by one in the four areas formed by the division of the two second display areas AA2, so that a second display area AA2 is provided between two adjacent first display areas AA1. Of course, the number of the second display areas AA2 and the first display areas AA1 included in the display panel 1 may also be other numbers, which are not described one by one here.

[0126] Moreover, the number of the first display areas AA1 and the second display areas AA2 included in the display panel 1 corresponds to the number of the sub-light guide plates 31 included in the light guide plate 3. For example, in the case where the light guide plate 3 includes two sub-light guide plates 31, the display panel 1 may include two first display areas AA1 and one second display area AA2, and the second display area AA2 is located between the two first display areas AA1; in the case where the light guide plate 3 includes four sub-light guide plates 31, the display panel 1 may also include four first display areas AA1 and two second display areas AA2, and the two second display areas AA2 are crossed to form a "cross" shape, and the four first display areas AA1 are located one by one in the four areas formed by the division of the two second display areas AA2.

[0127] The first display area AA1 is configured to display normally, and the second display area AA2 is configured to display black. The orthographic projection of the shielding layer 5 on the display panel 1 is located within the second display area AA2, that is, the shielding layer 5 at least shields a portion of the second display area AA2, and the portion shielded by the shielding layer 5 cannot view the display image, and the portion not shielded by the shielding layer 5 can view the display image. Therefore, the first display area AA1 not shielded by the shielding layer 5 is configured to display normally to ensure the normal display of the display module; the second display area AA2 shielded by the shielding layer 5 is configured to display black to reduce power consumption.

[0128] The width of the second display area AA2 in the second direction Y is greater than or equal to the first width and less than or equal to the second width. The first width is the width of the orthographic projection of the shielding layer 5 on the display panel 1 , or the first width is the width of the shielding layer 5 in the second direction Y.

[0129] Reference Fig.14As shown, since the viewing angle of the display module is generally within the range of less than 45 degrees, if simply calculated, the second width K can be the width of the projection of the shielding layer 5 on the display panel 1 at a viewing angle of 45 degrees. Specifically, the second width K=2(t3+t4+L / 2), wherein L is the width of the shielding layer 5 in the second direction Y, t3 is the thickness of the light guide plate 3 in the third direction Z, and t4 is the thickness of the gap 4 between the cover plate 8 and the light guide plate 3 in the third direction Z. Of course, the specific calculation formula of the second width will be different according to the different viewing angles of the display module, which will not be described one by one here.

[0130] It should also be noted that the width of the second display area AA2 in the second direction Y is also related to the refractive index and thickness of the cover plate 8, the refractive index and thickness of the light guide plate 3, and the thickness of the gap 4. The influence of the refractive index and thickness of the cover plate 8, the refractive index and thickness of the light guide plate 3, and the thickness of the gap 4 is ignored here; of course, in some other example implementations of the present disclosure, the above factors can also be taken into consideration and accurately calculated.

[0131] For example, in some exemplary embodiments, when the display module is viewed at an incident angle of 45°, the width of the corresponding obstructed display panel 1 is 9.7mm to 10.2mm, and the size of the sub-pixel 16 of the 55-inch display panel 1 is approximately 0.63mm, so the number of obstructed sub-pixels 16 is approximately 15 to 17, that is, the width of the second display area AA2 in the second direction Y occupies approximately 15 to 17 sub-pixels 16. Therefore, when displaying the picture, the obstructed area in the middle can be inserted as black, that is, the second display area AA2 is configured to display black, and the actual display effect is as follows: Fig.10 shown.

[0132] Moreover, according to Fig.10 As shown, the display images of at least two first display areas AA1 are continuous, that is, the image to be displayed on the display panel 1 is divided into at least two parts, and black is inserted between the two adjacent parts, so that the display images on the opposite sides of the second display area AA2 are continuous, thereby ensuring the continuity of the display effect; instead of replacing a part of the display image with the black display of the second display area AA2.

[0133] In addition, in some example embodiments of the present disclosure, Fig.15As shown, the display module may further include an adhesive layer 33, which is disposed in the splicing gap 32. The splicing gap 32 may be filled by the adhesive layer 33, that is, the length of the adhesive layer 33 in the first direction X is equal to the length of the splicing gap 32 in the first direction X, the width of the adhesive layer 33 in the second direction Y is equal to the width of the splicing gap 32 in the second direction Y, and the height of the adhesive layer 33 in the third direction Z is equal to the height of the splicing gap 32 in the third direction Z; the adhesive layer 33 may increase the connection strength between two adjacent sub-light guide plates 31.

[0134] Optionally, the ratio of the refractive index of the adhesive layer 33 to the refractive index of the sub-light guide plate 31 is greater than or equal to 0.95 and less than or equal to 1.05. For example, the ratio of the refractive index of the adhesive layer 33 to the refractive index of the sub-light guide plate 31 may be 0.98, 1, or 1.02. That is, the refractive index of the adhesive layer 33 is substantially the same as that of the sub-light guide plate 31, so that after the light completely enters the adhesive layer 33, it completely exits the adhesive layer 33, that is, diffuse reflection and refraction will basically not occur at the end surface 31a of the sub-light guide plate 31 near the splicing gap 32, and no bright line defect will be generated.

[0135] According to Fig.16 As shown, if the refractive index of the adhesive layer 33 is significantly different from that of the sub-light guide plate 31, diffuse reflection and refraction will occur at their connection interface, resulting in a bright line defect. Of course, in the case where an adhesive layer 33 having a refractive index significantly different from that of the sub-light guide plate 31 is provided, the various structures in the above exemplary embodiments can also be used to eliminate the bright line.

[0136] In addition, the display panel 1 may further include a polarizer 15 disposed on a side of the color filter substrate 14 facing away from the array substrate 11 .

[0137] Based on the same inventive concept, an exemplary embodiment of the present disclosure provides a display device, which may include any of the display modules described above. The specific structure of the display module has been described in detail above, so it will not be repeated here.

[0138] 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 outdoor 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.

[0139] It should be noted that, in addition to the 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 may make corresponding supplements according to the specific use requirements of the display device, which will not be repeated here.

[0140] 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 display module provided by the above exemplary embodiment, which will not be described in detail here.

[0141] 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 modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes 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 display module, characterized in that: include: A display panel including a reflective layer; A light guide plate, arranged at the light exiting side of the display panel, the light guide plate comprising at least two sub-light guide plates, with a splicing gap being arranged between two adjacent sub-light guide plates; The shielding layer is arranged on a side of the light guide plate away from the display panel, and the orthographic projection of the shielding layer on the display panel at least partially overlaps with the orthographic projection of the splicing gap on the display panel.

2. The display module according to claim 1, characterized in that: The shielding layer is attached to a side of the light guide plate that is away from the display panel.

3. The display module according to claim 2, characterized in that: The orthographic projection of the shielding layer on the display panel covers the orthographic projection of the splicing gap on the display panel, and the orthographic projection area of ​​the shielding layer on the display panel is larger than the orthographic projection area of ​​the splicing gap on the display panel.

4. The display module according to claim 3, characterized in that: The length of the blocking layer in the first direction is greater than or equal to the length of the splicing gap in the first direction; the width of the blocking layer in the second direction is L, L≥2(t3×tanθ)+t2, wherein t2 is the width of the splicing gap in the second direction, t3 is the thickness of the light guide plate in the third direction, and θ is the critical angle of total reflection of the light guide plate; the first direction and the second direction are parallel to a side of the display panel on which the light guide plate is set, the first direction is an extension direction of the splicing gap, the second direction is perpendicular to the first direction, and the third direction is perpendicular to a side of the display panel on which the light guide plate is set.

5. The display module according to claim 2, characterized in that: The roughness of the end surface of the sub-light guide plate close to the splicing gap is less than or equal to 0.2 nm, and the edge line of the orthographic projection of the shielding layer on the display panel coincides with the edge line of the orthographic projection of the splicing gap on the display panel.

6. The display module according to claim 1, characterized in that: The display module also includes: The cover plate is arranged on the side of the shielding layer away from the display panel, and a gap is arranged between the cover plate and the light guide plate; the shielding layer is attached to the side of the cover plate close to the display panel.

7. The display module according to claim 6, characterized in that: The orthographic projection of the shielding layer on the display panel covers the orthographic projection of the splicing gap on the display panel, and the orthographic projection area of ​​the shielding layer on the display panel is larger than the orthographic projection area of ​​the splicing gap on the display panel.

8. The display module according to claim 7, characterized in that: The length of the shielding layer in the first direction is greater than or equal to the length of the splicing gap in the first direction; the width of the shielding layer in the second direction is L, L≥2[(t3×tanθ / 2)+t4×sinθ / 2×n light guide plate / n air]+t2, wherein t2 is the width of the splicing gap in the second direction, t3 is the thickness of the light guide plate in the third direction, t4 is the thickness of the gap between the cover plate and the light guide plate in the third direction, θ is the critical angle of total reflection of the light guide plate, and n 导光板 is the refractive index of the light guide plate, n 空气 is the refractive index of air; the first direction and the second direction are parallel to the side of the display panel on which the light guide plate is set, the first direction is the extension direction of the splicing gap, the second direction is perpendicular to the first direction, and the third direction is perpendicular to the side of the display panel on which the light guide plate is set.

9. The display module according to claim 7, characterized in that: The length of the shielding layer in the first direction is greater than or equal to the length of the splicing gap in the first direction; the roughness of the end face of the sub-light guide plate close to the splicing gap is less than or equal to 0.2nm, and the width of the shielding layer in the second direction is L, L≥t2(t4+t3 / 2) / t3 / 2, wherein t2 is the width of the splicing gap in the second direction, t3 is the thickness of the light guide plate in the third direction, and t4 is the thickness of the gap between the cover plate and the light guide plate in the third direction; the first direction and the second direction are parallel to a side of the display panel on which the light guide plate is set, the first direction is an extension direction of the splicing gap, the second direction is perpendicular to the first direction, and the third direction is perpendicular to a side of the display panel on which the light guide plate is set.

10. The display module according to any one of claims 1 to 9, characterized in that: The display panel includes a second display area and at least two first display areas, the second display area is located between two adjacent first display areas, the first display area is configured for normal display, the second display area is configured for black display, and the orthographic projection of the shielding layer on the display panel is located within the second display area.

11. The display module according to claim 10, characterized in that: The width of the second display area in the second direction is greater than or equal to the first width and less than or equal to the second width, the first width is the width of the positive projection of the blocking layer on the display panel, and the second width is the width of the projection of the blocking layer on the display panel at a viewing angle of 45 degrees.

12. The display module according to claim 10, characterized in that: The display images of at least two of the first display areas are continuous.

13. The display module according to any one of claims 1 to 9, characterized in that: The shielding layer is a black foam structure and / or a black silk-screen structure.

14. The display module according to any one of claims 1 to 9, characterized in that: The display module also includes: The adhesive layer is arranged in the joint gap.

15. The display module according to claim 14, characterized in that: The ratio of the refractive index of the adhesive layer to the refractive index of the sub-light guide plate is greater than or equal to 0.95 and less than or equal to 1.

05.

16. A display device, characterized in that: include: The display module according to any one of claims 1 to 15.

Images