CN115763455A - Display module and mobile terminal - Google Patents

Abstract

The embodiment of the application discloses display module assembly and mobile terminal, display module assembly includes luminous backplate, and luminous backplate includes: the light splitting device comprises a substrate, a light emitting layer and a light splitting layer; the light-emitting layer comprises a plurality of light-emitting devices distributed in an array along a first direction and a second direction which intersect; the light splitting layer is arranged on the light emitting side of the light emitting layer and comprises at least one light splitting sheet, the light splitting sheet comprises a plurality of light splitting microstructures, the plurality of light splitting microstructures are arranged in an array mode according to a light splitting coordinate system, and the light splitting coordinate system comprises a third direction and a fourth direction which are intersected; wherein, the contained angle between third direction and the first direction is theta, and the value range of contained angle theta is: theta is more than or equal to 20 degrees and less than or equal to 70 degrees; this application is through the mode of arranging of adjustment beam splitting micro-structure and luminescent device, can effectively improve display module assembly's whole light efficiency, prevents to appear interference fringe, promotes display module assembly's picture taste.

Description

Display module and mobile terminal

Technical Field

The application relates to the technical field of display, in particular to a display module and a mobile terminal.

Background

The MiniLED technology has great potential and is expected to become one of the development directions of the next generation display technology, and as the MiniLED technology is widely applied to medium-high-end flat panels and notebook computer products, compared with the OLED, the MiniLED technology greatly improves the dark state display effect of the LTPS-LCD product, but needs to be improved in thickness and response time.

At present, the display panel adopting the MiniLED technology has obvious advantages in power consumption, high Dynamic Range (HDR) image standard, contrast (CR), brightness and product reliability, light emitting devices are uniformly distributed between lamp panels, the picture taste of the display panel under backlight and module states is poor, picture display unevenness, lamp shadows and other bad tastes are easy to occur, the picture taste is promoted by generally adopting a light splitting film in the prior art, the light splitting film can play a certain light splitting effect due to the arrangement of special array microstructures, but the interference of LED lamps between the light splitting film and the lamp panels is easy to form, and the whole light efficiency and the picture taste of the display module are influenced.

Disclosure of Invention

The embodiment of the application provides a display module assembly and mobile terminal, can effectively improve the whole light efficiency of display module assembly, prevents to appear interference fringe, promotes display module assembly's picture taste.

The embodiment of the application provides a display module assembly, including luminous backplate, luminous backplate includes:

a substrate;

the light-emitting layer is arranged on the substrate and comprises a plurality of light-emitting devices which are distributed in an array along a first direction and a second direction which are intersected;

the light splitting layer is arranged on the light emitting side of the light emitting layer and comprises at least one light splitting sheet, the light splitting sheet comprises a plurality of light splitting microstructures, the light splitting microstructures are arranged in an array mode according to a light splitting coordinate system, and the light splitting coordinate system comprises a third direction and a fourth direction which are intersected;

wherein, the third direction with the contained angle between the first direction is theta, the value range of contained angle theta is: theta is more than or equal to 20 degrees and less than or equal to 70 degrees.

Optionally, the light splitting sheet includes a substrate, the light splitting microstructure includes a geometric groove disposed on a side of the substrate away from the light emitting layer, the light splitting microstructure includes at least three bottom edges located on the side of the substrate, an included angle δ is formed between two adjacent bottom edges, and an included angle between the third direction and the fourth coordinate is the same as the included angle δ.

Optionally, the light splitting microstructure includes a first light splitting unit and a second light splitting unit which are adjacently disposed, and the first light splitting unit and the second light splitting unit have different light splitting surfaces.

Optionally, the light splitting layer includes a first light splitting sheet and a second light splitting sheet sequentially stacked on the light exit side of the light emitting layer, the plurality of light splitting microstructures on the first light splitting sheet are arranged according to a first light splitting coordinate system, and the plurality of light splitting microstructures on the second light splitting sheet are arranged according to a second light splitting coordinate system;

an included angle alpha is formed between the first light splitting coordinate and the second light splitting coordinate, and the value range of the included angle alpha is more than or equal to 10 degrees and less than or equal to 15 degrees.

Optionally, the light splitting microstructures on the first light splitting sheet are the same as the light splitting microstructures on the second light splitting sheet, and a sum of the included angle α and the included angle θ is 35 ° to 55 °.

Optionally, the light splitting layer further includes a third light splitting sheet, the first light splitting sheet, the second light splitting sheet and the third light splitting sheet are sequentially stacked along the light emitting direction of the light emitting layer, and the plurality of light splitting microstructures on the third light splitting sheet are arranged according to a third light splitting coordinate system;

an included angle beta is formed between the second light splitting coordinate and the third light splitting coordinate, and the value range of the included angle beta is more than or equal to 10 degrees and less than or equal to 15 degrees.

Optionally, the light splitting sheet further includes a plurality of light scattering microstructures, the plurality of light scattering microstructures are uniformly arranged between the light splitting microstructures, the plurality of light splitting microstructures and the plurality of light scattering microstructures are arranged in an array according to the light splitting coordinate system, and the light scattering microstructures include hemispherical lenses, cones or truncated cone structures.

Optionally, the light splitting microstructures are disposed on the periphery of the light scattering microstructures, and the ratio of the number of the light splitting microstructures to the number of the light splitting microstructures is 3:1.

Optionally, the light splitting microstructure includes a pyramid or a frustum of a pyramid.

In addition, the embodiment of the application also provides a mobile terminal, and the mobile terminal comprises any one of the display modules.

The beneficial effects of the invention at least comprise:

this application arranges according to first direction and second direction array through the luminescent device who sets up the luminescent layer, the beam splitting microstructure on beam splitting layer arranges along third and fourth direction array, the contained angle that sets up between first direction and the third direction is theta, the value range of contained angle theta is 20 theta ≤ 70, make beam splitting microstructure arrange the direction and the luminescent device arrange and have certain deflection angle between the direction, prevent that luminescent device's emergent light and beam splitting microstructure's reverberation or refraction light from taking place to interfere, produce the interference fringe, promote display module's whole light efficiency and picture quality.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a display module provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a light-emitting backplane provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a light splitting layer provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a light splitting layer according to another embodiment of the present disclosure;

fig. 5 is a schematic diagram of a film structure of a light-emitting backplane provided in an embodiment of the present application;

FIG. 6 is a schematic layout view of the spectroscopic microstructure enlarged at A in FIG. 4;

FIG. 7 is a cross-sectional view of a spectroscopic plate provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a spectroscopic microstructure provided in an embodiment of the present application;

FIG. 9 is a schematic view of another arrangement of the spectroscopic microstructure shown in FIG. 4 at an enlarged scale;

FIG. 10 is a cross-sectional view of a spectroscopic plate provided in an embodiment of the present application;

FIG. 11 is a schematic view of another arrangement of the spectroscopic microstructure enlarged at A in FIG. 4;

fig. 12 is a schematic diagram of a film structure of a light-emitting backplane provided in an embodiment of the present application;

fig. 13 is a schematic diagram of a film structure of a light-emitting backplane provided in an embodiment of the present application;

FIG. 14 is a schematic view of a beam splitter with light diffusing microstructure magnified at A in FIG. 4;

FIG. 15 is a schematic view of the light splitting sheet with the light scattering microstructure enlarged at A in FIG. 4;

FIG. 16 is a cross-sectional view of a light-splitting sheet provided in an embodiment of the present application;

fig. 17 shows interference fringes formed between a light-emitting layer and a light-splitting layer in the related art.

Reference numerals:

the light-emitting device comprises a light-emitting back plate-10, a display panel-20, a cover plate-30, a substrate-101, a light-emitting layer-102, a light-emitting device-1021, a light-splitting layer-103, a first direction-F1, a second direction-F2, a third direction-F3, a fourth direction-F4, a fifth direction-F5, a sixth direction-F6, a seventh direction-F7, an eighth direction-F8, a light-splitting microstructure-1031, a first light-splitting sheet-103 a, a substrate-1032, a depth-H, a bottom edge-S, a bevel edge-l, a first light-splitting unit-1031 a, a second light-splitting unit-1031 b, a second light-splitting sheet-103 b, a third light-splitting sheet-103 c and a light-dispersing microstructure-1033.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a display module and a mobile terminal. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments. In addition, in the description of the present application, the term "including" means "including but not limited to". The terms first, second, third and the like are used merely as labels, and do not impose numerical requirements or an order of establishment. Various embodiments of the invention may exist in a range of versions; it is to be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the invention; accordingly, the described range descriptions should be considered to have specifically disclosed all the possible sub-ranges as well as individual numerical values within that range. For example, it is contemplated that the description of a range from 1 to 6 has specifically disclosed sub-ranges such as, for example, 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., as well as individual numbers within a range such as, for example, 1, 2, 3, 4, 5, and 6, as applicable regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any number (fractional or integer) recited within the range so indicated.

The embodiment of the application provides a display module assembly, including luminous backplate 10, specifically as shown in fig. 1, fig. 2, fig. 3 and fig. 5, luminous backplate 10 includes:

a substrate 101;

a light emitting layer 102 disposed on the substrate 101, the light emitting layer 102 including a plurality of light emitting devices 1021 distributed in an array along a first direction F1 and a second direction F2 intersecting with each other;

the light splitting layer 103 is arranged on the light emitting side of the light emitting layer 102 and comprises at least one light splitting sheet, the light splitting sheet comprises a plurality of light splitting microstructures 1031, the plurality of light splitting microstructures 1031 are arranged in an array according to a light splitting coordinate system, and the light splitting coordinate system comprises a third direction F3 and a fourth direction F4 which are intersected;

an included angle between the third direction F3 and the first direction F1 is θ, and a value range of the included angle θ is as follows: theta is more than or equal to 20 degrees and less than or equal to 70 degrees.

Specifically, as shown in fig. 1, the display module includes a light-emitting backplane 10 stacked on top of each other, a display panel 20 disposed on the light-emitting side of the light-emitting backplane 10, and a cover plate 30 disposed on the side of the display panel 20 away from the light-emitting backplane 10, where the display panel 20 may be an LCD display panel.

Specifically, the light-emitting backplane 10 includes a substrate 101, a light-emitting layer 102 disposed on the substrate 101, and a light splitting layer 103 disposed on a light-emitting side of the light-emitting layer 102, and of course, the light-emitting backplane 10 may further include other optical films such as a quantum dot film or a brightness enhancement film, which is not limited in this application, wherein the substrate 101 may be a glass substrate, the light-emitting device 1021 may be a Mini LED, and the light-emitting device 1021 is exemplified by the Mini LED.

Specifically, as shown in fig. 2, the light emitting devices 1021 are arranged in an array on the substrate 101, that is, the light emitting devices 1021 are arranged in a first direction F1 and a second direction F2 which are respectively a row direction and a column direction, and the row pitch and the column pitch are not specifically limited, may be equal to or different from each other, and are not specifically limited, in an example, the first direction F1 is generally perpendicular to the second direction F2, and the present application takes as an example that the first direction F1 is perpendicular to the second direction F2, and the row pitch and the column pitch are equal to each other.

It should be noted that the mini LED is a lambertian light source, the light emitting devices 1021 arranged in an array may have uneven brightness distribution when emitting light, and in order to improve the light emitting uniformity of the light emitting backplane 10, the light splitting layer 103 is usually disposed for splitting light.

Specifically, the light splitting layer 103 is disposed on the light emitting side of the light emitting layer 102, the light splitting layer 103 may be a single-layer light splitting sheet, or may be a stack of multiple light splitting sheets, the thickness of the single-layer light splitting sheet may be 0.01-0.5mm, and the material of the light splitting sheet includes but is not limited to Polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), or a composite material of PC, PMMA, and PET.

Specifically, as shown in fig. 3 and 4, the light splitting sheet includes a plurality of light splitting microstructures 1031, one of the light splitting microstructures 1031 has a plurality of reflection surfaces with different orientations, light emitted from the light emitting device 1021 passes through the light splitting microstructure 1031, and the light splitting microstructure 1031 reflects or refracts incident light through the plurality of reflection surfaces to disperse the incident light in a plurality of directions, so as to improve the light intensity at the gap between the light emitting device 1021 and improve the light emitting uniformity of the light emitting backplane 10.

Specifically, as shown in fig. 3 and 4, the spectroscopic microstructures 1031 are arranged in an array on the spectroscopic sheet according to a spectroscopic coordinate system, and a distance between two adjacent spectroscopic microstructures 1031 in the third direction F3 may be the same as or different from a distance between two adjacent spectroscopic microstructures 1031 in the fourth direction F4, and is not particularly limited;

further, the plurality of spectroscopic microstructures 1031 may be disposed at intervals, or may be disposed in a manner of being adjacent to each other (the distance between adjacent spectroscopic microstructures 1031 is 0), and is not particularly limited, but it is preferable to be disposed side by side in order to improve the space utilization rate of the structure on the spectroscopic sheet.

Specifically, as shown in fig. 6, 7, 8 and 9, the spectroscopic microstructure 1031 is a solid geometry structure having a plurality of planar spectroscopic surfaces, and the spectroscopic microstructure 1031 includes a bottom surface and a plurality of spectroscopic surfaces connected to the bottom surface, and further, the spectroscopic microstructure 1031 may be specifically a triangular pyramid, a rectangular pyramid (shown in fig. 8), a polygonal pyramid, a triangular frustum, a rectangular frustum or a polygonal frustum.

The spectroscopic microstructure 1031 includes any one of a pyramid, a polygonal pyramid, a truncated pyramid, and a truncated pyramid.

Specifically, the spectroscopic microstructure 1031 may be an upward convex structure facing away from the substrate 101, or a downward concave structure facing toward the substrate 101;

when the spectroscopic microstructure 1031 is an upward convex structure facing away from the substrate 101, taking a convex rectangular pyramid as an example, the side surface thereof is a spectroscopic surface;

when the light splitting microstructure 1031 is a concave structure facing the substrate 101, taking a concave quadrangular pyramid-shaped groove as an example, the side wall of the groove is a light splitting surface, the concave structure is preferred in the application, and the setting mode can make the thickness of the light splitting sheet thinner.

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

Specifically, an included angle between the third direction F3 and the fourth direction F4 is not limited, and may be 60 ° or 90 °, that is, it is enough to have a non-zero included angle, and the present application is not limited, and in an example, the included angle between the third direction F3 and the fourth direction F4 may be related to an internal angle of the bottom surface shape of the spectroscopic microstructure 1031.

Specifically, as shown in fig. 5, the first direction F1 and the second direction F2 constitute a light emission arrangement coordinate system of the light emitting device 1021, which is a planar coordinate system, and further, which is a rectangular coordinate system.

Specifically, as shown in fig. 5, the third direction F3 and the fourth direction F4 form a spectroscopic coordinate system, the coordinate system is a planar coordinate system, and an included angle between the first direction F1 and the second direction F2 may be the same as or different from an included angle between the third direction F3 and the fourth direction F4.

It should be noted that, according to the shape limitation of the spectroscopic microstructure 1031, when the bottom surface of the spectroscopic microstructure 1031 is non-rectangular, the plurality of spectroscopic microstructures 1031 are closely distributed over the entire spectroscopic sheet, an included angle θ is formed between at least one third direction F3 and the first direction F1 in the arranged spectroscopic coordinate system, the value range of the included angle θ is 20 ° or more and 70 ° or less, and when the included angle is less than 20 ° or more than 70 °, the spectroscopic effect of the spectroscopic sheet is not good, and interference between light rays is easily generated, so that the display quality is poor.

Further, the included angle θ may be specifically any one of 20 °, 25 °, 30 °, 34 °, 35 °, 40 °, 50 °, 55 °, 56 °, 60 °, 65 °, and 70 °, and is not particularly limited, and may be adjusted according to a specific production condition.

It should be noted that, in the present application, the included angle θ is taken as an example of a minimum included angle between any one direction in the spectroscopic coordinate system and any one direction in the light emitting arrangement coordinate system in the present application.

It can be understood that the light emitting devices 1021 of the light emitting layer 102 are arranged in an array in the first direction F1 and the second direction F2, the light splitting microstructures 1031 of the light splitting layer 103 are arranged in an array in the third direction F4 and the fourth direction F4, an included angle between the first direction F1 and the third direction F3 is set to be θ, and a value range of the included angle θ is 20 ° or more and 70 ° or less, so that a certain deflection angle is formed between the arrangement direction of the light splitting microstructures 1031 and the arrangement direction of the light emitting devices 1021, and interference between the emergent light of the light emitting devices 1021 and the reflected light or refracted light of the light splitting microstructures 1031 is prevented, so as to generate interference fringes (as shown in fig. 17), thereby improving the overall light efficiency and the picture quality of the display module.

In an embodiment, the light splitting sheet includes a substrate 1032, the light splitting microstructure 1031 includes a geometric recess disposed on a side of the substrate 1032 facing away from the light emitting layer 102, the light splitting microstructure 1031 includes at least three bottom edges S located on the side of the substrate 1032, an included angle δ is formed between two adjacent bottom edges S, as shown in fig. 8, two side edges l and one bottom edge S form the light splitting surface, and an included angle between the third direction F3 and the fourth coordinate is the same as the included angle δ.

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.

Specifically, as shown in fig. 7 and 10, the ratio of the depth H of the geometric groove to the thickness of the beam splitter is preferably 0.1 to 0.8, that is, the depth H of the geometric groove is smaller than the thickness of the beam splitter, and the light splitting effect of the beam splitter can be adjusted by balancing the light splitting effect of the beam splitter according to the intensity requirement of the beam splitter.

Specifically, as shown in fig. 11, in an example, an included angle between the third direction F3 and the fourth direction F4 is related to an actual shape of the spectroscopic microstructure 1031, for example, when a bottom surface of the spectroscopic microstructure 1031 is a regular triangle, an included angle between the third direction F3 and the fourth direction F4 is 60 °; when the bottom surface of the spectroscopic microstructure 1031 is rectangular, an included angle between the third direction F3 and the fourth direction F4 is 90 degrees; when the bottom surface of the spectroscopic microstructure 1031 is an irregular triangle, the included angle between the third direction F3 and the fourth direction F4 may be the same as the degree of an inner angle in the irregular triangle, so that the spectroscopic microstructures 1031 on the spectroscopic sheet can be closely arranged, and the spectroscopic effect of the spectroscopic sheet is improved.

It can be understood that, this setting mode can effectively promote space utilization on the beam splitter, promotes the density of beam splitting microstructure 1031 on the beam splitter, promotes the beam splitting effect.

In an embodiment, as shown in fig. 11, the spectroscopic microstructure 1031 includes a first spectroscopic unit 1031a and a second spectroscopic unit 1031b disposed adjacent to each other, and the first spectroscopic unit 1031a and the second spectroscopic unit 1031b have different spectroscopic surfaces.

Specifically, the light splitting unit refers to a light splitting groove having a plurality of light splitting surfaces in this embodiment, one of the light splitting microstructures 1031 may be formed by adjacently disposing two light splitting grooves of different shapes, or by adjacently disposing three light splitting grooves of different shapes, the number of the light splitting units is not limited to two, and two are merely examples.

Specifically, the first light splitting unit 1031a and the second light splitting unit 1031b have a common bottom edge S.

Specifically, the depth of the recess of the first spectroscopic unit 1031a and the depth of the recess of the second spectroscopic unit 1031b may be the same or different, and is not limited.

Specifically, the bottom surfaces of the first and second light splitting units 1031a and 1031b may have the same or different shapes, and when the bottom surfaces of the first and second light splitting units 1031a and 1031b have the same shape, the bottom surface of the first light splitting unit 1031a may be formed by rotating the bottom surface of the second light splitting unit 1031b by a certain angle.

As shown in fig. 11, in the spectroscopic microstructure 1031, the orientations of the three reflective surfaces of the first spectroscopic unit 1031a and the orientation of the three reflective surfaces of the second spectroscopic unit 1031b are all different.

It can be understood that, by setting the differential optical structure to include the first light splitting unit 1031a and the second light splitting unit 1031b, the number of light beams dispersed by the differential optical structure is more, and the first light splitting unit 1031a and the second light splitting unit 1031b can also be set to have different depths H to reduce the possibility of interference between the reflected light beams of the light splitting and other light beams, so that the light splitting effect of the light splitting sheet is better, and the display quality is improved.

In one embodiment, as shown in fig. 12, the light splitting layer 103 includes a first light splitting sheet 103a and a second light splitting sheet 103b stacked, a plurality of the light splitting microstructures 1031 on the first light splitting sheet 103a are arranged according to a first light splitting coordinate system, and a plurality of the light splitting microstructures 1031 on the second light splitting sheet 103b are arranged according to a second light splitting coordinate system;

an included angle alpha is formed between the first light splitting coordinate and the second light splitting coordinate, and the value range of the included angle alpha is more than or equal to 10 degrees and less than or equal to 15 degrees.

Specifically, the spectroscopic microstructures 1031 on the first and second light splitting sheets 103a and 103b may be different or the same.

Further, the first light splitter 103a and the light splitting microstructure 1031 on the second light splitter 103b may be different and may be the same for the light splitting microstructure 1031 bottom surface on two light splitters, and the degree of depth H is different, adopts this technical scheme also can further avoid the interference between the light splitting light between the light splitters and the luminescent device 1021 emergent light, promotes the display effect.

Specifically, the arrangement positions of the first light splitter 103a and the second light splitter 103b relative to the light emitting layer 102 are not limited, and may be arranged in the order of the substrate 101, the light emitting layer 102, the first light splitter 103a, and the second light splitter 103b, or may be arranged in the order of the substrate 101, the light emitting layer 102, the second light splitter 103b, and the first light splitter 103 a.

Specifically, the plurality of spectroscopic microstructures 1031 on the first light splitting sheet 103a are arranged according to a first spectroscopic coordinate system, which includes a third direction F3 and a fourth direction F4; the plurality of spectroscopic microstructures 1031 on the second dichroic sheet 103b are arranged according to a second spectroscopic coordinate system, which includes a fifth direction F5 and a sixth direction F6;

an included angle between the third direction F3 and the fourth direction F4 is equal to an included angle between the fifth direction F5 and the sixth direction F6, an included angle α is formed between the first spectroscopic coordinate system and the second spectroscopic coordinate system, and the included angle α is an included angle formed by the third direction F3/the fourth direction F4 and the fifth direction F5;

an included angle between the third direction F3 and the fourth direction F4 is different from an included angle between the fifth direction F5 and the sixth direction F6, so that an included angle α is formed between the first spectroscopic coordinate system and the second spectroscopic coordinate system, and the included angle α is specifically a minimum included angle formed by any one direction in the first spectroscopic coordinate system and any one direction in the second spectroscopic coordinate system;

the value ranges of the included angles alpha are all more than or equal to 10 degrees and less than or equal to 15 degrees, the included angles alpha can be any one of 10 degrees, 11 degrees, 12 degrees, 13 degrees, 14 degrees and 15 degrees, and the included angles alpha can be adjusted according to actual conditions.

It can be understood that, the light splitting layer 103 is configured to include a first light splitting sheet 103a and a second light splitting sheet 103b which are stacked, so as to further enhance the light splitting effect of the light splitting layer 103, a plurality of the light splitting microstructures 1031 on the first light splitting sheet 103a are arranged according to a first light splitting coordinate system, a plurality of the light splitting microstructures 1031 on the second light splitting sheet 103b are arranged according to a second light splitting coordinate system, an included angle α is formed between the first light splitting coordinate and the second light splitting coordinate, the included angle α ranges from 10 ° to α and from 15 °, and interference between the outgoing light of the light emitting device 1021 on the light emitting layer 102, the reflected light/refracted light formed on the light splitting microstructures 1031 of the first light splitting sheet 103a, and the reflected light/refracted light formed on the light splitting microstructures 1031 of the second light splitting sheet 103b can be prevented, so as to form stripe defects, and affect the display quality.

In accordance with the above embodiment, the spectroscopic microstructure 1031 on the first dichroic sheet 103a is the same as the spectroscopic microstructure 1031 on the second dichroic sheet 103b, and the sum of the included angle α and the included angle θ is in a range of 35 ° to 55 °.

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

Specifically, in this embodiment, an included angle between the fifth direction F5 of the second spectroscopic coordinate and the first direction F1 is greater than an included angle between the third direction F3 and the first direction F1.

Further, 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 °.

It can be understood that two layers of light splitting sheets are arranged for light splitting, the sum range of the included angle alpha between the light splitting coordinate systems of the two light splitting sheets and the included angle theta is further limited to be 35-55 degrees, secondary interference of light rays can be avoided, meanwhile, the light emitting uniformity of the light emitting backlight is improved, and the display quality is improved.

In an embodiment, as shown in fig. 13, the light splitting layer 103 further includes a third light splitting sheet 103c, the first light splitting sheet 103a, the second light splitting sheet 103b and the third light splitting sheet 103c are sequentially stacked along the light emitting direction of the light emitting layer 102, and a plurality of light splitting microstructures 1031 on the third light splitting sheet 103c are arranged according to a third light splitting coordinate system;

an included angle beta is formed between the second light splitting coordinate system and the third light splitting coordinate system, and the value range of the included angle beta is more than or equal to 10 degrees and less than or equal to 15 degrees.

Specifically, the spectroscopic microstructures 1031 on the first, second and third light splitters 103a, 103b and 103c are the same.

Specifically, the plurality of spectroscopic microstructures 1031 on the third light splitter 103c are arranged according to a third spectroscopic coordinate system, the third spectroscopic coordinate system includes a seventh direction F7 and an eighth direction F8, and an included angle between the fifth direction F5 and the sixth direction F6 is equal to an included angle between the seventh direction F7 and the eighth direction F8.

Specifically, an included angle β is formed between the second light splitting coordinate system and the third light splitting coordinate system, and the included angle β is an included angle formed by the seventh direction F7/the eighth direction F8 and the fifth direction F5;

the value ranges of the included angles beta are all equal to or larger than 10 degrees and equal to or smaller than 15 degrees, the included angles beta can be any one of 10 degrees, 11 degrees, 12 degrees, 13 degrees, 14 degrees and 15 degrees, and the included angles beta can be adjusted according to actual conditions.

Specifically, an included angle between the first spectroscopic coordinate system and the third spectroscopic coordinate system is not limited, and only an angle between the spectroscopic coordinate system of the middle spectroscopic sheet and the spectroscopic coordinate systems of the two adjacent spectroscopic sheets is limited.

It can be understood that the light splitting layer 103 is provided with a first light splitting sheet 103a, a second light splitting sheet 103b and a third light splitting sheet 103c which are stacked, so as to further enhance the light splitting effect of the light splitting layer 103, a plurality of the light splitting microstructures 1031 on the first light splitting sheet 103a are arranged according to a first light splitting coordinate system, a plurality of the light splitting microstructures 1031 on the second light splitting sheet 103b are arranged according to a second light splitting coordinate system, a plurality of the light splitting microstructures 1031 on the third light splitting sheet 103c are arranged according to a third light splitting coordinate system, an included angle β is formed between the second light splitting coordinate system and the third coordinate system, the included angle β is in a range of 10 ° to β 15 °, and reflected light/refracted light formed on the light splitting microstructures 1031 of the second light splitting sheet 103b and reflected light/refracted light formed on the light splitting microstructures 1031 of the third light splitting sheet 103c can be prevented from interfering with each other to form interference, so as to form a fringe defect, and affect the display quality.

In an embodiment, as shown in fig. 14 and 16, the light splitting sheet further includes a plurality of light scattering microstructures 1033, the plurality of light scattering microstructures 1033 are uniformly disposed between the light splitting microstructures 1031, the plurality of light splitting microstructures 1031 and the plurality of light scattering microstructures 1033 are arranged in an array according to the light splitting coordinate system, and the light scattering microstructures 1033 include a hemispherical concave lens, a conical lens, or a truncated cone structure.

Specifically, the plurality of light scattering microstructures 1033 and the light splitting microstructures 1031 may be arranged in a checkerboard manner, or may be arranged in a periodic array manner such that one light scattering microstructure 1033 is located at the center of a squared figure, and the peripheral sides of the light scattering microstructures 1033 are all the light splitting microstructures 1031.

It should be noted that the light scattering microstructures 1033 mainly function to scatter light, and the light splitting microstructures 1031 mainly function to split light into a plurality of countable light rays.

In practical applications, although the light scattering microstructures 1033 can also split light, because the light splitting direction is more and complicated, compared with the light splitting structures such as a pyramid or a frustum, the light scattering microstructures 1033 actually play a role of diffuse reflection, and only using the light scattering microstructures 1033 can reduce the light emergent brightness of the backlight.

It can be understood that, in this embodiment, the plurality of light scattering microstructures 1033 are uniformly arranged between the light splitting microstructures 1031, the plurality of light splitting microstructures 1031 and the plurality of light scattering microstructures 1033 are arranged in an array according to the light splitting coordinate system, so that part of light is diffusely reflected and split, and part of light is split strongly, while the light splitting effect is improved, the light emitting brightness of the light emitting backboard 10 can also be effectively ensured, and meanwhile, the light scattering microstructures 1033 and the light splitting microstructures 1031 are arranged on the same layer, so that the thickness of the light emitting backboard 10 can be effectively reduced, the competitiveness of a display product is improved, and the user experience is improved.

In view of the above embodiments, as shown in fig. 14 and fig. 15, the spectroscopic microstructures 1031 are disposed on the peripheral side of the light scattering microstructures 1033, and the ratio of the number of the spectroscopic microstructures 1031 to the number of the spectroscopic microstructures 1031 is 3:1.

Specifically, compared with the light splitting microstructures 1031 and the light scattering microstructures 1033 which are alternately arranged, that is, arranged in a checkerboard manner, the present embodiment improves the ratio of the number of the light splitting microstructures 1031 to the number of the light scattering microstructures 1033, can effectively ensure the light extraction efficiency of the light emitting back plate 10, and avoids the problem that the light is continuously reflected or refracted to be consumed due to the excessive arrangement of the light scattering microstructures 1033, and the light extraction efficiency of the light emitting back plate 10 is low.

In addition, the embodiment of the application also provides a mobile terminal, and the mobile terminal comprises any one of the display modules.

In particular, mobile terminals include, but are not limited to, the following types: mobile phones, watches, bracelets, televisions or other touch-control electronic devices, as well as tablet computers, notebook computers, desktop displays, televisions, smart glasses, smart watches, ATM machines, digital cameras, vehicle-mounted displays, medical displays, industrial displays, electronic books, electrophoretic display devices, game consoles, and the like.

In summary, the light emitting devices 1021 of the light emitting layer 102 are arranged in an array in the first direction F1 and the second direction F2, the light splitting microstructures 1031 of the light splitting layer 103 are arranged in an array in the third direction F4 and the fourth direction F4, an included angle between the first direction F1 and the third direction F3 is set to be θ, and a value range of the included angle θ is 20 ° or more and 70 ° or less, so that a certain deflection angle is formed between the arrangement direction of the light splitting microstructures 1031 and the arrangement direction of the light emitting devices 1021, interference between outgoing light of the light emitting devices 1021 and reflected light or refracted light of the light splitting microstructures 1031 is prevented, interference fringes are generated, and the overall light efficiency and picture quality of the display module are improved.

The display module and the mobile terminal provided by the embodiment of the present application are described in detail above, a specific example is applied in the description to explain the principle and the implementation of the present application, and the description of the above embodiment is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. The display module is characterized by comprising a luminous back plate, wherein the luminous back plate comprises:

a substrate;

the light-emitting layer is arranged on the substrate and comprises a plurality of light-emitting devices which are distributed in an array along a first direction and a second direction which are intersected;

the light splitting layer is arranged on the light emitting side of the light emitting layer and comprises at least one light splitting sheet, the light splitting sheet comprises a plurality of light splitting microstructures, the light splitting microstructures are arranged in an array mode according to a light splitting coordinate system, and the light splitting coordinate system comprises a third direction and a fourth direction which are intersected;

wherein, the third direction with the contained angle between the first direction is theta, the value range of contained angle theta is: theta is more than or equal to 20 degrees and less than or equal to 70 degrees.

2. The display module according to claim 1, wherein the light splitter comprises a substrate, the light splitting microstructure comprises a geometric groove disposed on a side of the substrate facing away from the light emitting layer, the light splitting microstructure comprises at least three bottom edges disposed on the side of the substrate, an included angle δ is formed between two adjacent bottom edges, and an included angle δ is the same as an included angle δ between the third direction and the fourth coordinate.

3. The display module according to claim 2, wherein the light splitting microstructure comprises a first light splitting unit and a second light splitting unit which are adjacently arranged, and the first light splitting unit and the second light splitting unit have different light splitting surfaces.

4. The display module according to claim 1, wherein the light splitting layer comprises a first light splitting layer and a second light splitting layer sequentially stacked on the light emitting side of the light emitting layer, the plurality of light splitting microstructures on the first light splitting layer are arranged according to a first light splitting coordinate system, and the plurality of light splitting microstructures on the second light splitting layer are arranged according to a second light splitting coordinate system;

an included angle alpha is formed between the first light splitting coordinate and the second light splitting coordinate, and the value range of the included angle alpha is more than or equal to 10 degrees and less than or equal to 15 degrees.

5. The display module according to claim 4, wherein the light splitting microstructures on the first light splitting sheet are the same as the light splitting microstructures on the second light splitting sheet, and the sum of the included angle α and the included angle θ is in a range of 35 ° to 55 °.

6. The display module according to claim 4, wherein the light splitting layer further comprises a third light splitting layer, the first light splitting layer, the second light splitting layer and the third light splitting layer are sequentially stacked along the light emitting direction of the light emitting layer, and the plurality of light splitting microstructures on the third light splitting layer are arranged according to a third light splitting coordinate system;

an included angle beta is formed between the second light splitting coordinate and the third light splitting coordinate, and the value range of the included angle beta is more than or equal to 10 degrees and less than or equal to 15 degrees.

7. The display module according to claim 1, wherein the light splitter further comprises a plurality of light scattering microstructures, the plurality of light scattering microstructures are uniformly arranged between the light splitting microstructures, the plurality of light splitting microstructures and the plurality of light scattering microstructures are arranged in an array according to the light splitting coordinate system, and the light scattering microstructures comprise hemispherical lenses, conical structures or truncated cone structures.

8. The display module of claim 7, wherein the light-splitting microstructures are disposed on the periphery of the light-scattering microstructures, and the ratio of the number of the light-splitting microstructures to the number of the light-splitting microstructures is 3:1.

9. The display module of claim 1, wherein the light-splitting microstructures comprise pyramids or prismatic tables.

10. A mobile terminal, characterized in that it comprises a display module according to any one of claims 1 to 9.

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