Display modules and mobile terminals

Abstract

This application discloses a display module and a mobile terminal. The display module includes a light-emitting backplane, which comprises a substrate, a light-emitting layer, and a beam-splitting layer. The light-emitting layer includes multiple light-emitting devices arranged in an array along intersecting first and second directions. The beam-splitting layer is disposed on the light-emitting side of the light-emitting layer and includes at least one beam splitter. The beam splitter includes multiple beam-splitting microstructures arranged in an array according to a beam-splitting coordinate system, which includes intersecting third and fourth directions. The angle between the third direction and the first direction is θ, and the value of the angle θ is in the range of 20°≤θ≤70°. By adjusting the arrangement of the beam-splitting microstructures and light-emitting devices, this application can effectively improve the overall light efficiency of the display module, prevent interference fringes, and enhance the picture quality of the display module.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display module and a mobile terminal. Background Technology

[0002] Mini LED technology has great potential and is expected to become one of the next-generation display technology development directions. With the widespread application of Mini LED technology in mid-to-high-end tablet and laptop products, compared with OLED, Mini LED has greatly improved the dark state display effect of LTPS-LCD products, but there is still room for improvement in thickness and response time.

[0003] Currently, display panels using Mini LED technology have significant advantages in power consumption, high dynamic range (HDR) image standards, contrast ratio (CR), brightness, and product reliability. However, the uniform distribution of light-emitting devices between the lamp panels results in poor image quality in backlit and module states, easily leading to uneven image display and lighting effects. Existing technologies commonly use beam-splitting films to improve image quality. While beam-splitting films can achieve a certain beam-splitting effect due to their special array microstructure arrangement, they can also easily cause interference between the beam-splitting films and the LEDs on the lamp panels, affecting the overall light efficiency and image quality of the display module. Summary of the Invention

[0004] This application provides a display module and a mobile terminal, which can effectively improve the overall light effect of the display module, prevent interference stripes, and enhance the picture quality of the display module.

[0005] This application embodiment provides a display module, including a light-emitting backplate, the light-emitting backplate comprising:

[0006] substrate;

[0007] A light-emitting layer is disposed on the substrate, the light-emitting layer comprising a plurality of light-emitting devices arranged in an array along an intersecting first direction and a second direction;

[0008] A beam-splitting layer is disposed on the light-emitting side of the light-emitting layer, including at least one beam-splitting plate. The beam-splitting plate includes multiple beam-splitting microstructures, which are arranged in an array according to a beam-splitting coordinate system, which includes an intersecting third direction and a fourth direction.

[0009] The angle between the third direction and the first direction is θ, and the value of the angle θ is in the range of 20°≤θ≤70°.

[0010] Optionally, the beam splitter includes a substrate, and the beam splitting microstructure includes a geometric groove disposed on a side of the substrate opposite to the light-emitting layer. The beam splitting microstructure includes at least three bottom edges located on the side of the substrate, with an included angle δ between two adjacent bottom edges. The included angle between the third direction and the fourth coordinate is the same as the included angle δ.

[0011] Optionally, the beam-splitting microstructure includes a first beam-splitting unit and a second beam-splitting unit arranged adjacent to each other, the first beam-splitting unit and the second beam-splitting unit having different beam-splitting surfaces.

[0012] Optionally, the beam-splitting layer includes a first beam-splitting sheet and a second beam-splitting sheet stacked sequentially on the light-emitting side of the light-emitting layer. The plurality of beam-splitting microstructures on the first beam-splitting sheet are arranged according to a first beam-splitting coordinate system, and the plurality of beam-splitting microstructures on the second beam-splitting sheet are arranged according to a second beam-splitting coordinate system.

[0013] Wherein, there is an angle α between the first spectral coordinate and the second spectral coordinate, and the value of the angle α is in the range of 10°≤α≤15°.

[0014] Optionally, the beam-splitting microstructure on the first beam splitter is the same as the beam-splitting microstructure on the second beam splitter, and the sum of the included angle α and the included angle θ ranges from 35° to 55°.

[0015] Optionally, the beam-splitting layer further includes a third beam-splitting plate, wherein the first beam-splitting plate, the second beam-splitting plate, and the third beam-splitting plate are stacked sequentially along the light emission direction of the light-emitting layer, and the plurality of beam-splitting microstructures on the third beam-splitting plate are arranged according to a third beam-splitting coordinate system;

[0016] The second and third spectral coordinates are separated by an angle β, and the angle β ranges from 10° to 15°.

[0017] Optionally, the beam splitter further includes multiple astigmatic microstructures, which are uniformly disposed between the beam splitter microstructures. The multiple beam splitter microstructures and the multiple astigmatic microstructures are arranged in an array according to the beam splitter coordinate system. The astigmatic microstructures include hemispherical lenses, conical or frustum structures.

[0018] Optionally, the spectral microstructure is disposed on the periphery of the astigmatic microstructure, and the ratio of the number of spectral microstructures to the number of astigmatic microstructures is 3:1.

[0019] Optionally, the spectral microstructure includes a pyramid or frustum.

[0020] Furthermore, this application embodiment also provides a mobile terminal, which includes the display module described in any of the above claims.

[0021] The beneficial effects of this invention include at least the following:

[0022] This application sets up an array of light-emitting devices in the light-emitting layer arranged in a first and second direction, and a array of beam-splitting microstructures in the beam-splitting layer arranged in a third and fourth direction. The angle between the first and third directions is set to θ, and the value of the angle θ is in the range of 20°≤θ≤70°. This allows for a certain deflection angle between the arrangement direction of the beam-splitting microstructure and the arrangement direction of the light-emitting devices, preventing interference between the emitted light from the light-emitting devices and the reflected or refracted light from the beam-splitting microstructure, thus preventing interference fringes and improving the overall light efficiency and image quality of the display module. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the display module provided in the embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the structure of the light-emitting backplate provided in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the structure of the beam-splitting layer provided in an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the structure of the beam-splitting layer provided in another embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the film structure of the light-emitting backplate provided in the embodiments of this application;

[0029] Figure 6 yes Figure 4 A magnified schematic diagram of the arrangement of the spectral microstructure at point A in the middle;

[0030] Figure 7 This is a cross-sectional view of the beam splitter provided in the embodiments of this application;

[0031] Figure 8 This is a schematic diagram of the structure of the spectral microstructure provided in the embodiments of this application;

[0032] Figure 9 yes Figure 4 A magnified schematic diagram of the arrangement of another type of spectral microstructure at point A in the middle;

[0033] Figure 10This is a cross-sectional view of the beam splitter provided in the embodiments of this application;

[0034] Figure 11 yes Figure 4 A magnified schematic diagram of the arrangement of another type of spectral microstructure at point A in the middle;

[0035] Figure 12 This is a schematic diagram of the film structure of the light-emitting backplate provided in the embodiments of this application;

[0036] Figure 13 This is a schematic diagram of the film structure of the light-emitting backplate provided in the embodiments of this application;

[0037] Figure 14 yes Figure 4 A magnified schematic diagram of the beam splitter with astigmatic microstructure at point A in the middle;

[0038] Figure 15 yes Figure 4 A magnified schematic diagram of the beam splitter with astigmatic microstructure at point A in the middle;

[0039] Figure 16 This is a cross-sectional view of a beam splitter provided in an embodiment of this application;

[0040] Figure 17 These are interference fringes formed between the beam-splitting layer and the light-emitting layer in existing technologies.

[0041] Figure label:

[0042] Light-emitting backplate-10, display panel-20, cover plate-30, substrate-101, light-emitting layer-102, light-emitting device-1021, beam-splitting layer-103, first direction-F1, second direction-F2, third direction-F3, fourth direction-F4, fifth direction-F5, sixth direction-F6, seventh direction-F7, eighth direction-F8, beam-splitting microstructure-1031, first beam splitter-103a, substrate-1032, depth-H, bottom edge-S, bevel-l, first beam-splitting unit-1031a, second beam-splitting unit-1031b, second beam splitter-103b, third beam splitter-103c, diffused light microstructure-1033. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] This application provides a display module and a mobile terminal. Detailed descriptions are provided below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". The terms first, second, third, etc., are used merely as illustrative and do not impose numerical requirements or establish an order. Various embodiments of the present invention may exist in the form of a range; it should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of the present invention; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single digits within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Additionally, whenever a numerical range is indicated herein, it means including any referenced number (fraction or integer) within the indicated range.

[0045] This application provides a display module, including a backlight 10, specifically as follows: Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the light-emitting backplate 10 includes:

[0046] substrate 101;

[0047] A light-emitting layer 102 is disposed on the substrate 101. The light-emitting layer 102 includes a plurality of light-emitting devices 1021 arranged in an array along an intersecting first direction F1 and a second direction F2.

[0048] A beam-splitting layer 103 is disposed on the light-emitting side of the light-emitting layer 102 and includes at least one beam-splitting plate. The beam-splitting plate includes multiple beam-splitting microstructures 1031. The multiple beam-splitting microstructures 1031 are arranged in an array according to a beam-splitting coordinate system, which includes an intersecting third direction F3 and a fourth direction F4.

[0049] Wherein, the angle between the third direction F3 and the first direction F1 is θ, and the value range of the angle θ is: 20°≤θ≤70°.

[0050] Specifically, such as Figure 1 As shown, the display module includes a stacked backlight 10, a display panel 20 disposed on the light-emitting side of the backlight 10, and a cover plate 30 disposed on the side of the display panel 20 away from the backlight 10. The display panel 20 can be an LCD display panel.

[0051] Specifically, the light-emitting backplate 10 includes a substrate 101, a light-emitting layer 102 disposed on the substrate 101, and a beam-splitting layer 103 disposed on the light-emitting side of the light-emitting layer 102. Of course, the light-emitting backplate 10 may also include other optical films such as quantum dot films or brightness enhancement films. This application does not impose any restrictions. The substrate 101 may be a glass substrate, and the light-emitting device 1021 may be a Mini LED. This application uses a Mini LED as an example to illustrate the light-emitting device 1021.

[0052] Specifically, such as Figure 2 As shown, a plurality of light-emitting devices 1021 are arranged in an array on the substrate 101, that is, the plurality of light-emitting devices 1021 are arranged in rows and columns in the first direction F1 and the second direction F2, respectively. The row spacing and column spacing are not specifically limited and can be equal or unequal. In the example, the first direction F1 is usually perpendicular to the second direction F2. This application uses the example of the first direction F1 being perpendicular to the second direction F2 and the row spacing and column spacing being equal to illustrate.

[0053] It should be noted that mini LEDs are Lambertian light sources. When the array of light-emitting devices 1021 emits light, the brightness distribution will be uneven. In order to improve the light emission uniformity of the backplate 10, a beam splitting layer 103 is usually set to split the light.

[0054] Specifically, the beam-splitting layer 103 is disposed on the light-emitting side of the light-emitting layer 102. The beam-splitting layer 103 can be a single-layer beam splitter or a multi-layer beam splitter stacked together. The thickness of a single-layer beam splitter can be 0.01-0.5 mm. The material of the beam splitter includes, but is not limited to, polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), or a composite material of PC, PMMA, and PET.

[0055] Specifically, such as Figure 3 and Figure 4 As shown, the beam splitter includes multiple beam splitting microstructures 1031. Each beam splitting microstructure 1031 has multiple reflective surfaces with different orientations. The light emitted from the light-emitting device 1021 passes through the beam splitting microstructure 1031. The beam splitting microstructure 1031 reflects or refracts the incident light through multiple reflective surfaces, dispersing the incident light in multiple directions, thereby increasing the light intensity between the light-emitting devices 1021 and improving the light emission uniformity of the light-emitting backplate 10.

[0056] Specifically, such as Figure 3 and Figure 4As shown, the beam-splitting microstructures 1031 are arranged in an array on the beam-splitting plate according to the beam-splitting coordinate system. The spacing between two adjacent beam-splitting microstructures 1031 on the third direction F3 can be the same as or different from the spacing between two adjacent beam-splitting microstructures 1031 on the fourth direction F4. No specific limitation is imposed.

[0057] Furthermore, the multiple beam-splitting microstructures 1031 can be arranged at intervals or adjacent to each other (the spacing between adjacent beam-splitting microstructures 1031 is 0). There are no specific restrictions, but in order to improve the space utilization of the structure on the beam splitter, it is preferred to arrange them side by side.

[0058] Specifically, such as Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the beam-splitting microstructure 1031 is a three-dimensional geometric structure with multiple planar beam-splitting surfaces. The beam-splitting microstructure 1031 includes a bottom surface and multiple beam-splitting surfaces connected to the bottom surface. Further, the beam-splitting microstructure 1031 can specifically be a triangular pyramid or a square pyramid. Figure 8 (as shown), a multi-faceted pyramid, a triangular frustum, a square frustum, or a multi-faceted frustum.

[0059] The spectral microstructure 1031 includes any one of a pyramid, a multi-pyramid, a frustum, or a multi-frustum.

[0060] Specifically, the spectral microstructure 1031 can be an upwardly convex structure facing away from the substrate 101, or a downwardly concave structure facing the substrate 101.

[0061] When the beam-splitting microstructure 1031 is a convex structure facing away from the substrate 101, taking a convex quadrangular pyramid as an example, its side surface is the beam-splitting surface.

[0062] When the beam-splitting microstructure 1031 is a recessed structure facing the substrate 101, taking a recessed quadrangular pyramidal groove as an example, the sidewall of the groove is the beam-splitting surface. This application prefers a recessed structure, which can make the beam-splitting sheet thinner.

[0063] Specifically, the height of the spectral microstructure 1031 in the direction perpendicular to the substrate 101 is not limited and can be adjusted according to actual production conditions.

[0064] Specifically, the angle between the third direction F3 and the fourth direction F4 is not limited and can be 60° or 90°, that is, as long as there is a non-zero angle, this application does not impose any restrictions. In one example, the angle between the third direction F3 and the fourth direction F4 can be related to the interior angle of the bottom surface shape of the spectral microstructure 1031.

[0065] Specifically, such as Figure 5 As shown, the first direction F1 and the second direction F2 constitute the light-emitting arrangement coordinate system of the light-emitting device 1021. This coordinate system is a planar coordinate system, and further, the light-emitting arrangement coordinate system is a rectangular coordinate system.

[0066] Specifically, such as Figure 5 As shown, the third direction F3 and the fourth direction F4 constitute a beam splitting coordinate system, which is a planar coordinate system. The angle between the first direction F1 and the second direction F2 can be the same as or different from the angle between the third direction F3 and the fourth direction F4.

[0067] It should be noted that, due to the shape limitations of the beam splitting microstructure 1031, when the bottom surface of the beam splitting microstructure 1031 is not rectangular, multiple beam splitting microstructures 1031 are closely arranged to fill the entire beam splitter. In the beam splitting coordinate system of its arrangement, at least one third direction F3 has an angle θ between it and the first direction F1. The value of the angle θ is in the range of 20°≤θ≤70°. When the angle is less than 20° and greater than 70°, the beam splitting effect of the beam splitter is not good, and it is easy to cause interference between light rays, which makes the display quality worse.

[0068] Furthermore, the included angle θ can be any one of 20°, 25°, 30°, 34°, 35°, 40°, 50°, 55°, 56°, 60°, 65°, and 70°, without any specific limitation, and can be adjusted according to the specific production situation.

[0069] It should be noted that, in this application, the included angle θ is taken as the minimum included angle between any direction in the spectral coordinate system and any direction in the emission arrangement coordinate system.

[0070] It is understandable that by arranging the light-emitting devices 1021 of the light-emitting layer 102 in an array according to the first direction F1 and the second direction F2, and arranging the beam-splitting microstructures 1031 of the beam-splitting layer 103 in an array along the third and fourth directions F4, and setting the angle between the first direction F1 and the third direction F3 to θ, with the value of θ ranging from 20°≤θ≤70°, a certain deflection angle is achieved between the arrangement direction of the beam-splitting microstructures 1031 and the arrangement direction of the light-emitting devices 1021. This prevents interference between the emitted light from the light-emitting devices 1021 and the reflected or refracted light from the beam-splitting microstructures 1031, thus preventing the generation of interference fringes (such as...). Figure 17 As shown, this enhances the overall lighting effect and image quality of the display module.

[0071] In one embodiment, the beam splitter includes a substrate 1032, and the beam splitting microstructure 1031 includes a geometric groove disposed on a side of the substrate 1032 opposite to the light-emitting layer 102. The beam splitting microstructure 1031 includes at least three bottom edges S located on the side of the substrate 1032, and an included angle δ is formed between two adjacent bottom edges S. Figure 8 As shown, the two sides l and a bottom edge S constitute the beam splitting surface, and the angle between the third direction F3 and the fourth coordinate is the same as the angle δ.

[0072] Specifically, the material of the substrate 1032 includes, but is not limited to, polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), or a composite material of PC, PMMA, and PET.

[0073] Specifically, such as Figure 7 and Figure 10 As shown, the ratio of the depth H of the geometric groove to the thickness of the beam splitter is preferably 0.1 to 0.8:1, that is, the depth H of the geometric groove is less than the thickness of the beam splitter. It can be adjusted to balance the beam splitter effect according to the intensity requirements of the beam splitter.

[0074] Specifically, such as Figure 11 As shown, in one example, the angle between the third direction F3 and the fourth direction F4 is related to the actual shape of the beam-splitting microstructure 1031. For example, when the base of the beam-splitting microstructure 1031 is an equilateral triangle, the angle between the third direction F3 and the fourth direction F4 is 60°; when the base of the beam-splitting microstructure 1031 is a rectangle, the angle between the third direction F3 and the fourth direction F4 is 90°; when the base of the beam-splitting microstructure 1031 is an irregular triangle, the angle between the third direction F3 and the fourth direction F4 can be the same as the degree of one interior angle of the irregular triangle, so that the beam-splitting microstructures 1031 on the beam splitter can be closely arranged, improving the beam splitting effect of the beam splitter.

[0075] Understandably, this configuration can effectively improve the space utilization of the beam splitter, increase the density of the beam splitter microstructure 1031 on the beam splitter, and improve the beam splitting effect.

[0076] In one embodiment, such as Figure 11 As shown, the beam splitting microstructure 1031 includes a first beam splitting unit 1031a and a second beam splitting unit 1031b arranged adjacent to each other, and the first beam splitting unit 1031a and the second beam splitting unit 1031b have different beam splitting surfaces.

[0077] Specifically, in this embodiment, the beam-splitting unit refers to a beam-splitting groove with multiple beam-splitting surfaces. The beam-splitting microstructure 1031 can be two beam-splitting grooves of different shapes arranged adjacent to each other, or three beam-splitting grooves of different shapes arranged adjacent to each other. The number of beam-splitting units is not limited to only two; two is just an example.

[0078] Specifically, the first beam splitting unit 1031a and the second beam splitting unit 1031b have a common bottom edge S.

[0079] Specifically, the recess depth of the first beam splitting unit 1031a and the recess depth of the second beam splitting unit 1031b can be the same or different, and there is no specific limitation.

[0080] Specifically, the bottom shapes of the first beam splitting unit 1031a and the second beam splitting unit 1031b can be the same or different. When the bottom shapes of the first beam splitting unit 1031a and the second beam splitting unit 1031b are the same, the bottom surface of the first beam splitting unit 1031a can be obtained by rotating the bottom surface of the second beam splitting unit 1031b by a certain angle.

[0081] like Figure 11 As shown, in the beam-splitting microstructure 1031, the orientations of the three reflective surfaces of the first beam-splitting unit 1031a and the three reflective surfaces of the second beam-splitting unit 1031b are different.

[0082] It is understandable that by setting the micro-beam splitting structure to include the first beam splitting unit 1031a and the second beam splitting unit 1031b, the number of light rays dispersed by the micro-beam splitting structure is increased. Furthermore, the first beam splitting unit 1031a and the second beam splitting unit 1031b can be set to have different depths H to reduce the possibility of interference between the reflected light rays and other light rays, thereby improving the beam splitting effect of the beam splitter and enhancing the display quality.

[0083] In one embodiment, such as Figure 12 As shown, the beam splitting layer 103 includes a first beam splitter 103a and a second beam splitter 103b stacked together. The plurality of beam splitting microstructures 1031 on the first beam splitter 103a are arranged according to a first beam splitting coordinate system, and the plurality of beam splitting microstructures 1031 on the second beam splitter 103b are arranged according to a second beam splitting coordinate system.

[0084] Wherein, there is an angle α between the first spectral coordinate and the second spectral coordinate, and the value of the angle α is in the range of 10°≤α≤15°.

[0085] Specifically, the beam-splitting microstructures 1031 on the first beam splitter 103a and the second beam splitter 103b can be different or the same.

[0086] Furthermore, the beam-splitting microstructures 1031 on the first beam splitter 103a and the second beam splitter 103b can be different. The bottom surfaces of the beam-splitting microstructures 1031 on the two beam splitters can be the same, but the depths H are different. This technical solution can also further avoid interference between the beam splitting rays between the beam splitters and the light emitted from the light-emitting device 1021, thereby improving the display effect.

[0087] Specifically, the arrangement of the first beam splitter 103a and the second beam splitter 103b relative to the light-emitting layer 102 is not limited. They can be arranged in the order of substrate 101, light-emitting layer 102, first beam splitter 103a, and second beam splitter 103b, or in the order of substrate 101, light-emitting layer 102, second beam splitter 103b, and first beam splitter 103a.

[0088] Specifically, the plurality of beam-splitting microstructures 1031 on the first beam splitter 103a are arranged according to a first beam splitting coordinate system, which includes a third direction F3 and a fourth direction F4; the plurality of beam splitting microstructures 1031 on the second beam splitter 103b are arranged according to a second beam splitting coordinate system, which includes a fifth direction F5 and a sixth direction F6.

[0089] If the angle between the third direction F3 and the fourth direction F4 is equal to the angle between the fifth direction F5 and the sixth direction F6, then the first beam splitting coordinate system and the second beam splitting coordinate system have an angle α, which is the angle formed by the third direction F3 / the fourth direction F4 and the fifth direction F5.

[0090] If the angle between the third direction F3 and the fourth direction F4 is not equal to the angle between the fifth direction F5 and the sixth direction F6, then there is an angle α between the first beam-splitting coordinate system and the second beam-splitting coordinate system. Specifically, the angle α is the smallest angle formed by any direction in the first beam-splitting coordinate system and any direction in the second beam-splitting coordinate system.

[0091] The range of the included angle α mentioned above all satisfies 10°≤α≤15°. Specifically, the included angle α can be any one of 10°, 11°, 12°, 13°, 14°, and 15°, and can be adjusted according to the actual situation.

[0092] It is understood that the beam-splitting layer 103 includes a first beam splitter 103a and a second beam splitter 103b stacked together, which can further improve the beam splitting effect of the beam-splitting layer 103. The multiple beam splitting microstructures 1031 on the first beam splitter 103a are arranged according to a first beam splitting coordinate system, and the multiple beam splitting microstructures 1031 on the second beam splitter 103b are arranged according to a second beam splitting coordinate system. There is an angle α between the first beam splitting coordinate system and the second beam splitting coordinate system. The angle α is in the range of 10°≤α≤15°. This can prevent interference between the light emitted from the light-emitting device 1021 on the light-emitting layer 102, the reflected / refracted light formed on the beam splitting microstructures 1031 of the first beam splitter 103a, and the reflected / refracted light formed on the beam splitting microstructures 1031 of the second beam splitter 103b, which would otherwise form stripe defects and affect the display quality.

[0093] Following the above embodiments, the beam-splitting microstructure 1031 on the first beam splitter 103a is the same as the beam-splitting microstructure 1031 on the second beam splitter 103b, and the sum of the included angle α and the included angle θ ranges from 35° to 55°.

[0094] Specifically, the sum of the included angle α and the included angle θ can be any one of 35°, 36°, 38°, 40°, 45°, 46°, 48°, 50°, 53°, and 55°, and can be adjusted according to the actual production situation.

[0095] Specifically, in this embodiment, the angle between the fifth direction F5 of the second spectral coordinate and the first direction F1 is greater than the angle between the third direction F3 and the first direction F1.

[0096] Furthermore, when the first direction F1 is perpendicular to the second direction F2, the sum of the included angle α and the included angle θ is preferably 45°.

[0097] It is understandable that setting two beam splitters for beam splitting, and further limiting the sum of the angle α between the beam splitting coordinate systems of the two beam splitters to 35°~55°, can avoid secondary interference of light, while improving the uniformity of backlight emission and enhancing the display quality.

[0098] In one embodiment, such as Figure 13 As shown, the beam splitting layer 103 further includes a third beam splitter 103c. The first beam splitter 103a, the second beam splitter 103b and the third beam splitter 103c are stacked sequentially along the light emission direction of the light-emitting layer 102. The plurality of beam splitting microstructures 1031 on the third beam splitter 103c are arranged according to the third beam splitting coordinate system.

[0099] The second and third spectral coordinate systems are separated by an angle β, and the angle β ranges from 10° to 15°.

[0100] Specifically, the beam-splitting microstructures 1031 on the first beam splitter 103a, the second beam splitter 103b, and the third beam splitter 103c are the same.

[0101] Specifically, the plurality of beam-splitting microstructures 1031 on the third beam splitter 103c are arranged according to a third beam-splitting coordinate system, which includes a seventh direction F7 and an eighth direction F8, and the angle between the fifth direction F5 and the sixth direction F6 is equal to the angle between the seventh direction F7 and the eighth direction F8.

[0102] Specifically, the second beam splitting coordinate system and the third beam splitting coordinate system have an angle β between them, and the angle β is the angle formed by the seventh direction F7 / eighth direction F8 and the fifth direction F5;

[0103] The range of the included angle β mentioned above all satisfies 10°≤β≤15°. Specifically, the included angle β can be any one of 10°, 11°, 12°, 13°, 14°, and 15°, and can be adjusted according to the actual situation.

[0104] Specifically, the angle between the first and third beam-splitting coordinate systems is not limited; only the angle between the beam-splitting coordinate system of the middle beam splitter and the beam-splitting coordinate systems of its two adjacent beam splitters is limited.

[0105] It is understood that the beam-splitting layer 103 includes a first beam splitter 103a, a second beam splitter 103b, and a third beam splitter 103c stacked together, which can further improve the beam splitting effect of the beam-splitting layer 103. The multiple beam-splitting microstructures 1031 on the first beam splitter 103a are arranged according to a first beam splitting coordinate system, the multiple beam-splitting microstructures 1031 on the second beam splitter 103b are arranged according to a second beam splitting coordinate system, and the multiple beam-splitting microstructures 1031 on the third beam splitter 103c are arranged according to a third beam splitting coordinate system. An angle β is formed between the second beam splitting coordinate system and the third coordinate system, with the angle β ranging from 10° ≤ β ≤ 15°. This prevents interference between the reflected / refracted light formed on the beam-splitting microstructures 1031 of the second beam splitter 103b and the reflected / refracted light formed on the beam-splitting microstructures 1031 of the third beam splitter 103c, thus preventing stripe defects and affecting the display quality.

[0106] In one embodiment, such as Figure 14 , Figure 16As shown, the beam splitter also includes a plurality of astigmatic microstructures 1033, which are uniformly disposed between the beam splitting microstructures 1031. The plurality of beam splitting microstructures 1031 and the plurality of astigmatic microstructures 1033 are arranged in an array according to the beam splitting coordinate system. The astigmatic microstructures 1033 include hemispherical concave lenses, conical or frustum structures.

[0107] Specifically, the multiple astigmatic microstructures 1033 and the beam-splitting microstructures 1031 can be arranged in a checkerboard pattern, or they can be arranged in a periodic array with one astigmatic microstructure 1033 located in the center of a 3x3 grid and the beam-splitting microstructures 1031 surrounding the astigmatic microstructure 1033.

[0108] It should be noted that the main function of the astigmatic microstructure 1033 is to scatter light, and the main function of the beam-splitting microstructure 1031 is to split light into multiple countable rays.

[0109] In practical applications, although the astigmatic microstructure 1033 can also split light, due to the multiple and complex directions of its splitting, compared with light-splitting structures such as pyramids or frustums, the astigmatic microstructure 1033 actually plays the role of diffuse reflection. Using only the astigmatic microstructure 1033 will reduce the brightness of the backlight output.

[0110] It is understood that in this embodiment, multiple diffuse microstructures 1033 are uniformly disposed between the beam-splitting microstructures 1031. The multiple beam-splitting microstructures 1031 and the multiple diffuse microstructures 1033 are arranged in an array according to the beam-splitting coordinate system, so that some light is diffusely reflected and split, and some light is strongly split. While improving the beam splitting effect, the light output brightness of the light-emitting backplate 10 can also be effectively guaranteed. At the same time, setting the diffuse microstructures 1033 and the beam-splitting microstructures 1031 in the same layer can effectively reduce the thickness of the light-emitting backplate 10, improve the competitiveness of the display product, and enhance the user experience.

[0111] Following the above embodiments, as Figure 14 and Figure 15 As shown, the spectral microstructure 1031 is disposed on the periphery of the astigmatic microstructure 1033, and the ratio of the number of spectral microstructures 1031 to the number of astigmatic microstructures 1033 is 3:1.

[0112] Specifically, compared to alternating the beam-splitting microstructure 1031 and the light-scattering microstructure 1033, i.e., arranging them in a checkerboard pattern, this embodiment increases the ratio of the number of beam-splitting microstructures 1031 to the number of light-scattering microstructures 1033. This effectively ensures the light-emitting efficiency of the backlight 10 and avoids the light being continuously reflected or refracted and consumed due to an excessive number of light-scattering microstructures 1033, resulting in low light-emitting efficiency of the backlight 10.

[0113] Furthermore, this application embodiment also provides a mobile terminal, which includes the display module described in any of the above claims.

[0114] Specifically, mobile terminals include, but are not limited to, the following types: mobile phones, watches, wristbands, televisions or other touch-screen electronic devices, as well as tablets, laptops, desktop monitors, televisions, smart glasses, smartwatches, ATMs, digital cameras, in-vehicle displays, medical displays, industrial control displays, e-readers, electrophoretic display devices, game consoles, etc.

[0115] In summary, this application arranges the light-emitting devices 1021 of the light-emitting layer 102 in an array according to the first direction F1 and the second direction F2, and arranges the beam-splitting microstructures 1031 of the beam-splitting layer 103 in an array along the third and fourth directions F4. The angle between the first direction F1 and the third direction F3 is set to θ, and the value of the angle θ is in the range of 20°≤θ≤70°. This makes the arrangement direction of the beam-splitting microstructures 1031 have a certain deflection angle with the arrangement direction of the light-emitting devices 1021, so as to prevent the emitted light of the light-emitting devices 1021 from interfering with the reflected or refracted light of the beam-splitting microstructures 1031 and generating interference fringes, thereby improving the overall light efficiency and picture quality of the display module.

[0116] The above provides a detailed description of a display module and mobile terminal provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display module, characterized in that, Includes a light-emitting backplate, the light-emitting backplate comprising: substrate; A light-emitting layer is disposed on the substrate, the light-emitting layer comprising a plurality of light-emitting devices arranged in an array along an intersecting first direction and a second direction, the first direction being perpendicular to the second direction; A beam-splitting layer, disposed on the light-emitting side of the light-emitting layer, includes at least one beam-splitting plate. The beam-splitting plate includes multiple beam-splitting microstructures arranged in an array according to a beam-splitting coordinate system. The beam-splitting coordinate system includes an intersecting third direction and a fourth direction, and the angle between the third direction and the fourth direction is a non-zero angle. The beam-splitting layer includes a first beam-splitting plate and a second beam-splitting plate stacked sequentially on the light-emitting side of the light-emitting layer. The multiple beam-splitting microstructures on the first beam-splitting plate are arranged according to a first beam-splitting coordinate system, and the multiple beam-splitting microstructures on the second beam-splitting plate are arranged according to a second beam-splitting coordinate system. The first beam-splitting coordinate system and the second beam-splitting coordinate system have an angle α, and the angle α ranges from 10° ≤ α ≤ 15°. The angle between the third direction and the first direction is θ, and the value of the angle θ is in the range of 20°≤θ≤70°.

2. The display module as described in claim 1, characterized in that, The beam splitter includes a substrate, and the beam splitting microstructure includes a geometric groove disposed on a side of the substrate opposite to the light-emitting layer. The beam splitting microstructure includes at least three bottom edges located on the side of the substrate, with an included angle δ between two adjacent bottom edges. The included angle between the third direction and the fourth direction is the same as the included angle δ.

3. The display module as described in claim 2, characterized in that, The beam-splitting microstructure includes a first beam-splitting unit and a second beam-splitting unit arranged adjacent to each other, and the first beam-splitting unit and the second beam-splitting unit have different beam-splitting surfaces.

4. The display module as described in claim 1, characterized in that, The beam-splitting microstructure on the first beam splitter is the same as the beam-splitting microstructure on the second beam splitter, and the sum of the included angle α and the included angle θ ranges from 35° to 55°.

5. The display module as described in claim 1, characterized in that, The beam-splitting layer further includes a third beam-splitting plate, wherein the first beam-splitting plate, the second beam-splitting plate, and the third beam-splitting plate are stacked sequentially along the light emission direction of the light-emitting layer, and the plurality of beam-splitting microstructures on the third beam-splitting plate are arranged according to a third beam-splitting coordinate system; The second and third spectral coordinate systems are separated by an angle β, and the angle β ranges from 10° to 15°.

6. The display module as described in claim 1, characterized in that, The beam splitter also includes multiple astigmatic microstructures, which are uniformly disposed between the beam splitter microstructures. The multiple beam splitter microstructures and the multiple astigmatic microstructures are arranged in an array according to the beam splitter coordinate system. The astigmatic microstructures include hemispherical lenses, conical or frustum structures.

7. The display module as described in claim 6, characterized in that, The spectral microstructure is disposed on the periphery of the astigmatic microstructure, and the ratio of the number of spectral microstructures to the number of astigmatic microstructures is 3:

1.

8. The display module as described in claim 1, characterized in that, The spectral microstructure includes a pyramid or frustum.

9. A mobile terminal, characterized in that, Includes the display module as described in any one of claims 1 to 8.

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