Brightness enhancement film, display module and display equipment

Abstract

The utility model discloses a brightness enhancement film, a display module and a display device, the brightness enhancement film comprises a base layer, a first refraction condensation layer arranged on the light emitting side of the base layer and a second refraction condensation layer arranged on the light incident side of the base layer, and the first refraction condensation layer comprises at least one first protruding cylinder; the second refraction condensation layer comprises at least one second protruding column body and at least one third protruding column body, and the second protruding column body and the third protruding column body are complementary; a certain included angle is formed between the axis direction of the first protruding column body and the axis direction of the second protruding column body. The first refraction condensation layer and the second refraction condensation layer are correspondingly arranged on the light emitting side of the base layer and the light incident side of the base layer respectively, so that the single brightness enhancement film has double optical gains, the brightness enhancement effect is higher than that of the traditional double brightness enhancement film configuration, and due to the fact that only one brightness enhancement film is used, the brightness enhancement effect is better than that of the traditional double brightness enhancement film configuration. The cost is greatly reduced compared with that of a traditional double-film brightness enhancement film.

Description

Technical Field

[0001] The utility model relates to the technical field of brightness enhancement films, and in particular to a brightness enhancement film, a display module and a display device. Background Art

[0002] Brightness enhancement film is the most commonly used optical gain film in display products. It uses the refraction and reflection effects of the triangular prism structure on the light-emitting surface to focus the divergent light source within a range of about 70°, thereby greatly improving the brightness at the normal viewing angle. A single brightening film can increase the brightness by about 15%. For display products with ultra-high brightness requirements, two brightening films with prisms perpendicular to each other are generally used in combination, which can increase the brightness by about 30%. Its cost is also high. Utility Model Content

[0003] The main purpose of the utility model is to provide a light film, a display module and a display device, aiming to solve the problem of high cost caused by using two light-enhancing films in a stacked manner.

[0004] To achieve the above-mentioned purpose, the utility model provides a brightness enhancement film, comprising a base layer, a first refractive light focusing layer arranged on the light emitting side of the base layer, and a second refractive light focusing layer arranged on the light incident side of the base layer, wherein:

[0005] The first refractive light-focusing layer includes at least one first protruding column;

[0006] The second refractive light-focusing layer includes at least one second protruding column and at least one third protruding column, and the second protruding column and the third protruding column are complementary;

[0007] The axis direction of the first protruding column is arranged at a certain angle with the axis direction of the protruding column.

[0008] Optionally, one side of the second protruding column is in contact with the base layer, and the third protruding column is disposed on the other side of the second protruding column away from the base layer;

[0009] The refractive index of the second protruding column is lower than that of the third protruding column.

[0010] Optionally, the first protruding column includes a prism or an arc-shaped column, the second protruding column includes a prism or an arc-shaped column, and the third protruding column includes a prism or an arc-shaped column.

[0011] Optionally, the first protruding column includes a first triangular prism, a plurality of the first triangular prisms are provided and arranged in sequence along the axis direction of the second protruding column, a side surface of each of the first triangular prisms is attached to the base layer to jointly cover the light emitting side of the base layer, and the refractive index of the first triangular prisms is lower than that of air;

[0012] The second protruding column includes a second triangular prism, and the second triangular prism is provided in plurality and arranged in sequence along the axial direction of the first protruding column. The third protruding column includes a third triangular prism, and the third triangular prism is provided in plurality and respectively embedded between two adjacent second triangular prisms. One side surface of each second triangular prism is bonded to the base layer to jointly cover the light incident side of the base layer. Two adjacent third triangular prisms jointly cover the second triangular prism located therebetween, wherein the refractive index of the second triangular prism is lower than that of the third triangular prism.

[0013] Optionally, the cross section of the first triangular prism is an isosceles triangle, and the bottom side of the cross section of the first triangular prism is in contact with the base layer;

[0014] The cross sections of the second triangular prism and the third triangular prism are both set to be isosceles triangles, and the bottom side of the cross section of the second triangular prism is in contact with the base layer, and the bottom side of the cross section of the third triangular prism is parallel to the base layer.

[0015] Optionally, the vertex angles of the cross sections of the first triangular prism, the second triangular prism and the third triangular prism are set to ɑ, and 87°≤ɑ≤93°.

[0016] Optionally, in the axial direction of the first protruding column, the distance between the tops of two adjacent third triangular prisms is L1, and 50 μm≤L1≤90 μm; and / or,

[0017] In the axial direction of the second protruding column, the distance between the tops of two adjacent first triangular prisms is L2, and 50 μm≤L2≤90 μm.

[0018] Optionally, the material of the base layer is set to be any one of polyethylene terephthalate, polystyrene and polycarbonate.

[0019] Optionally, the thickness of the first refractive light-condensing layer and the second refractive light-condensing layer is S, and 25 μm≤S≤45 μm.

[0020] The utility model also proposes a display module, which includes a screen body, a backlight module and at least one brightness enhancement film, wherein the screen body is arranged in a rectangular shape; the backlight module is arranged on one side of the screen body in the thickness direction; the at least one brightness enhancement film is arranged between the screen body and the backlight module, and the brightness enhancement film is the brightness enhancement film as described in the above claims, and the at least one brightness enhancement film includes a first brightness enhancement film, and the axial direction of the first protruding column of the first brightness enhancement film and the axial direction of the second protruding column are arranged to be the diagonal direction of the screen body.

[0021] Optionally, a second brightness enhancement film is further arranged between the screen body and the backlight module, and the axial direction of the first protruding column and the axial direction of the second protruding column of the second brightness enhancement film are arranged along two side lines of the screen body.

[0022] In addition, the utility model also proposes a display device, which includes a display module, and the display module includes a screen body, a backlight module and at least one bright-enhancing film, wherein the screen body is arranged in a rectangular shape; the backlight module is arranged on one side of the thickness direction of the screen body; the at least one bright-enhancing film is arranged between the screen body and the backlight module, and the bright-enhancing film is the bright-enhancing film as described in the above claims, and the at least one bright-enhancing film includes a first bright-enhancing film, and the axial direction of the first protruding column of the first bright-enhancing film and the axial direction of the second protruding column are arranged to be the diagonal direction of the screen body.

[0023] In the technical solution of the utility model, the brightness enhancement film includes a base layer, a first refractive light focusing layer arranged on the light emitting side of the base layer, and a second refractive light focusing layer arranged on the light incident side of the base layer, wherein: the first refractive light focusing layer is used to refract and focus light in a first light focusing direction; the second refractive light focusing layer is used to refract and focus light in a second light focusing direction; the first light focusing direction and the second light focusing direction are arranged at a certain angle. By correspondingly arranging the first refractive light focusing layer and the second refractive light focusing layer on the light emitting side of the base layer and the light incident side of the base layer, a single brightness enhancement film has double optical gain, and the brightening effect is higher than that of the traditional double brightness enhancement film configuration, and because only one brightness enhancement film is used, its cost is greatly reduced compared with the traditional double brightness enhancement film. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of an embodiment of the brightness enhancement film provided by the utility model;

[0026] Figure 2 A three-dimensional schematic diagram of the brightness enhancement film provided by the utility model;

[0027] Figure 3 A schematic diagram of a second embodiment of the brightness enhancement film provided by the utility model;

[0028] Figure 4 A schematic diagram of a third embodiment of the brightness enhancement film provided by the utility model;

[0029] Figure 5 A schematic diagram of a fourth embodiment of the brightness enhancement film provided by the utility model;

[0030] Figure 6 A schematic diagram of a fifth embodiment of the brightness enhancement film provided by the utility model;

[0031] Figure 7 A schematic diagram of a sixth embodiment of the brightness enhancement film provided by the utility model;

[0032] Figure 8 A schematic diagram of an embodiment of a display module (side-entry type) provided by the utility model;

[0033] Fig. 9 A schematic diagram of another embodiment of the display module (direct type) provided by the utility model;

[0034] Fig.10 A schematic diagram of an embodiment of a display device provided by the utility model.

[0035] Description of Figure Numbers:

[0036] Label name Label name 1 Brightness Enhancement Film 13b The third raised column 11 Grassroots 131 The second triangular prism 12 The first refractive focusing layer 132 The third triangular prism 12a The first raised column 100 Display module 121 The first triangular prism 101 Screen 13 Second refraction focusing layer 102 Backlight module 13a The second raised column

[0037] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0041] Brightness enhancement film is the most commonly used optical gain film in display products. It uses the refraction and reflection effects of the triangular prism structure on the light-emitting surface to focus the divergent light source within a range of about 70°, thereby greatly improving the brightness at the normal viewing angle. A single brightening film can increase the brightness by about 15%. For display products with ultra-high brightness requirements, two brightening films with prisms perpendicular to each other are generally used in combination, which can increase the brightness by about 30%. Its cost is also high.

[0042] In view of this, the utility model proposes a brightness enhancement film, by respectively setting the first refractive light focusing layer and the second refractive light focusing layer on the light emitting side of the base layer and the light incident side of the base layer, so that a single brightness enhancement film has double optical gain, and the brightening effect is higher than the traditional double brightness enhancement film configuration, and because only one brightness enhancement film is used, its cost is greatly reduced compared with the traditional double brightness enhancement film. Figure 1 and Figure 2 FIG. 1 is an embodiment of the brightness enhancement film proposed by the present invention. Figure 3 , which is a schematic diagram of a second embodiment of the brightness enhancement film provided by the utility model; Figure 4 The above is a schematic diagram of a third embodiment of the brightness enhancement film provided by the utility model; Figure 5 , which is a schematic diagram of a fourth embodiment of the brightness enhancement film provided by the present utility model; Figure 6 , which is a schematic diagram of a fifth embodiment of the brightness enhancement film provided by the present utility model; Figure 7 , which is a schematic diagram of a sixth embodiment of the brightness enhancement film provided by the utility model.

[0043] like Figure 1As shown, the brightness enhancement film 1 proposed by the utility model comprises a base layer 11, a first refractive light focusing layer 12 arranged on the light emitting side of the base layer 11, and a second refractive light focusing layer 13 arranged on the light incident side of the base layer 11, wherein: the first refractive light focusing layer 12 comprises at least one first protruding column; the second refractive light focusing layer 13 comprises at least one second protruding column and at least one third protruding column, the second protruding column and the third protruding column are complementary; the axial direction of the first protruding column and the axial direction of the second protruding column are arranged at a certain angle. It should be noted that the second protruding column and the third protruding column are complementary in that: the structure formed by the splicing of the second protruding column and the third protruding column is parallel to the base layer on the side away from the base layer, wherein one of the second protruding column and the third protruding column is directly bonded to the light incident side of the base layer, and the other is not directly bonded to the light incident side of the base layer, but covers the protruding column bonded to the light incident side of the base layer.

[0044] In the technical solution of the utility model, the brightness enhancement film 1 includes a base layer 11, a first refractive light focusing layer 12 arranged on the light emitting side of the base layer 11, and a second refractive light focusing layer 13 arranged on the light incident side of the base layer 11, wherein: the first refractive light focusing layer 12 includes at least one first protruding column; the second refractive light focusing layer 13 includes at least one second protruding column and at least one third protruding column, and the second protruding column and the third protruding column are complementary; the axial direction of the first protruding column is arranged at a certain angle to the axial direction of the second protruding column. By correspondingly arranging the first refractive light focusing layer 12 and the second refractive light focusing layer 13 on the light emitting side of the base layer 11 and the light incident side of the base layer 11, a single brightness enhancement film 1 has double optical gain, and the brightening effect is higher than that of the traditional double brightness enhancement film configuration, and because only one brightness enhancement film 1 is used, its cost is greatly reduced compared with the traditional double brightness enhancement film.

[0045] In this embodiment, if Figure 1 As shown, one side of the second protruding column is in contact with the base layer, and the third protruding column is disposed on the other side of the second protruding column away from the base layer; the refractive index of the second protruding column is lower than that of the third protruding column. In this way, a column structure with high and low refractive indices arranged alternately can be formed on the light-entering side of the base layer 11, so that the incident light can form a refraction effect to achieve light energy convergence and brightness gain.

[0046] In this embodiment, the first protruding column includes a prism or an arc column, the second protruding column includes a prism or an arc column, and the third protruding column includes a prism or an arc column. The first protruding column, the second protruding column and the third protruding column can be any one of a prism and an arc column, wherein the combination form of the first protruding column, the second protruding column and the third protruding column is not limited, and can be, for example Figure 1 As shown, the first protruding column comprises a prism, the second protruding column comprises a prism, and the third protruding column comprises a prism; or, as Figure 3 As shown, the first protruding column includes an arc column, the second protruding column includes a prism, and the third protruding column includes a prism. It can also be, as shown in Figure 4 As shown, the first protruding column comprises a prism, the second protruding column comprises an arc column, and the third protruding column is configured to be a structure complementary to the second protruding column; or as Figure 5 As shown, the first protruding column includes a prism, the third protruding column is an arc column, and the second protruding column is configured to be a structure complementary to the third protruding column; it can also be, as shown Figure 6 As shown, the first protruding column includes an arc column, the second protruding column is configured as an arc column, and the third protruding column is configured as a structure complementary to the second protruding column configured as an arc column; or as Figure 7 As shown, the first protruding column includes an arc column, the third protruding column is configured as an arc column, and the second protruding column is configured as a structure complementary to the third protruding column.

[0047] Specifically, in this embodiment, Figure 1As shown, the first raised column includes a first triangular prism, and the first triangular prisms are provided in plurality and arranged in sequence along the axial direction of the second raised column, and one side surface of each of the first triangular prisms is bonded to the base layer to jointly cover the light-emitting side of the base layer, and the refractive index of the first triangular prism is lower than that of air; the second raised column includes a second triangular prism, and the second triangular prisms are provided in plurality and arranged in sequence along the axial direction of the first raised column, and the third raised column includes a third triangular prism, and the third triangular prisms are provided in plurality and respectively embedded between two adjacent second triangular prisms, and one side surface of each of the second triangular prisms is bonded to the base layer to jointly cover the light-entering side of the base layer, and two adjacent third triangular prisms jointly cover the second triangular prism located therebetween, wherein the refractive index of the second triangular prism is lower than that of the third triangular prism. In this way, by utilizing the refraction and reflection effects of the first triangular prism 121 structure arranged on the light-emitting side of the base layer 11, the divergent light source is gathered within a range of about 70° for emission, thereby greatly improving the brightness at the front viewing angle, and a triangular prism structure with high and low refractive indices arranged alternately is formed on the light-incident side of the base layer 11, so that the incident light can form a refraction effect, thereby achieving light energy convergence and brightness gain.

[0048] In this embodiment, the cross section of the first triangular prism 121 is an isosceles triangle, and the bottom side of the cross section of the first triangular prism 121 is aligned with the base layer 11; the cross sections of the second triangular prism 131 and the third triangular prism 132 are both set to be isosceles triangles, and the bottom side of the cross section of the second triangular prism 131 is aligned with the base layer 11, and the bottom side of the cross section of the third triangular prism 132 is parallel to the base layer 11. By setting the cross sections of the first triangular prism 121, the second triangular prism 131, and the third triangular prism 132 to be isosceles triangles, the light incident side of the base layer 11 has a better refractive effect, and the light emitted from the light exit side of the base layer 11 is more uniform.

[0049] In this embodiment, the top angles of the cross sections of the first triangular prism 121, the second triangular prism 131, and the third triangular prism 132 are set to ɑ By setting the vertex angle ɑ of the cross section of the first triangular prism 121 , the second triangular prism 131 , and the cross section of the third triangular prism 132 to be greater than or equal to 87° and less than or equal to 93°, the optical gain effect of the brightness enhancement film 1 is further improved.

[0050] In one embodiment, in the axial direction of the first convex column, the distance between the tops of two adjacent third triangular prisms 132 is L1, and 50μm≤L1≤90μm; in another example, in the axial direction of the second convex column, the distance between the tops of two adjacent first triangular prisms 121 is L2, and 50μm≤L2≤90μm; in yet another embodiment, in the axial direction of the first convex column, the distance between the tops of two adjacent second triangular prisms 131 is L1, and 50μm≤L1≤90μm; in the axial direction of the second convex column, the distance between the tops of two adjacent first triangular prisms 121 is L2, and 50μm≤L2≤90μm. Specifically, in this embodiment, in the direction of the axis of the first protruding column, the distance between the tops of two adjacent third triangular prisms 132 is L1, and 50μm≤L1≤90μm; in the direction of the axis of the second protruding column, the distance between the tops of two adjacent first triangular prisms 121 is L2, and 50μm≤L2≤90μm. Since it is difficult to process when the prism spacing is less than 50μm, and it is easy to cause problems such as interference fringes and rainbow fringes when the prism spacing is too large, by setting the spacing between the prisms to 50μm to 90μm, it is easy to process and avoid interference fringes, rainbow fringes and other problems.

[0051] In this embodiment, the material of the base layer 11 is set to any one of polyethylene terephthalate, polystyrene and polycarbonate. The material of the base layer 11 can be selected according to needs as long as it can meet the use requirements.

[0052] In this embodiment, the thickness of the first refractive light-gathering layer 12 and the second refractive light-gathering layer 13 is S, and 25 μm≤S≤45 μm. By setting the thickness S of the first refractive light-gathering layer 12 and the second refractive light-gathering layer 13 to be greater than or equal to 25 μm and less than or equal to 45 μm, the first refractive light-gathering layer 12 and the second refractive light-gathering layer 13 have appropriate thicknesses while ensuring the refractive effects of the first refractive light-gathering layer 12 and the second refractive light-gathering layer 13, so as to help reduce the thickness of the brightness enhancement film 1.

[0053] The present invention also provides a display module 100, such as Figures 8 to 10As shown, the display module 100 includes a screen body 101, a backlight module 102 and at least one brightness enhancement film, the screen body 101 is arranged in a rectangular shape; the backlight module 102 is arranged on one side of the thickness direction of the screen body; the at least one brightness enhancement film is arranged between the screen body and the backlight module, the brightness enhancement film 1 is the brightness enhancement film 1 as described in the above claims, and the at least one brightness enhancement film includes a first brightness enhancement film, and the axis direction of the first protruding column of the first brightness enhancement film and the axis direction of the second protruding column are set as the diagonal direction of the screen body 101. In this way, a plurality of the first triangular prisms 121 and a plurality of the second triangular prisms 131 are arranged in sequence along one of the diagonal directions of the screen body to gather the light energy in the diagonal direction, and a plurality of the third triangular prisms 132 are arranged in sequence along one of the diagonal directions of the screen body 101 to gather the light energy in the diagonal direction. It is found that there is more light energy distribution along the diagonal direction of the screen body, and a higher brightness gain can be obtained by gathering the light energy in the diagonal direction of the screen. For example, the screen length of a 16:9 display module is 16:9:18.36, and the angle between the diagonal and the long side of the screen is about 29°. For a 16:9 screen, the angle between the second triangular prism 131 and the third triangular prism 132 of the second refractive light-gathering layer 12 of the brightness enhancement film 1 and the long side of the screen is set to 151° or 29°, and the corresponding angle between the first triangular prism 131 of the first refractive light-gathering layer 13 of the brightness enhancement film 1 and the long side of the screen is set to 29° or 151°, which can obtain a higher brightness gain and maximize the brightness. It should be noted that when the screen is a curved screen, the diagonal of the plane formed by the four corners of the screen is taken as a reference to determine the axial direction of the first protruding column and the axial direction of the second protruding column.

[0054] It should be noted that the angle of the brightness enhancement film 1 refers to the angle between the peak of the triangular prism and the long side direction of the base layer 11, wherein the peak of the triangular prism refers to the edge formed by the intersection of two side surfaces of the triangular prism that are not in contact with the base layer 11, wherein the shape of the base layer 11 is consistent with the shape of the screen body, and the angle between the triangular prisms in the first refractive focusing layer 12 and the second refractive focusing layer 13 and the base layer is determined according to the screen body.

[0055] In this embodiment, a second brightness enhancement film is further disposed between the screen body 101 and the backlight module 102 , and the axis direction of the first protruding column and the axis direction of the second protruding column of the second brightness enhancement film are disposed along two side lines of the screen body 101 . In this way, multiple first triangular prisms 121 and multiple second triangular prisms 132 are arranged in sequence along the long side or short side direction of the screen body 101 to gather light energy in the horizontal direction, and multiple third triangular prisms 132 are arranged in sequence along the short side or direction of the screen body 101 to gather light energy in the vertical direction, that is, the angle between the second triangular prism 131 and the third triangular prism 132 of the second refractive focusing layer 12 of the brightness enhancement film 1 and the long side of the screen body is set to 90° or 0°, and the corresponding angle between the first triangular prism 121 of the first refractive focusing layer 13 of the brightness enhancement film 1 and the long side of the screen body is set to 0° or 90°. In this way, further adding the second brightness enhancement film to the 16:9 display module can achieve quadruple light energy gain in the dual diagonal directions, horizontal direction, and vertical direction of the display screen, and the brightness can be increased by up to 80%, which can greatly increase the upper limit of brightness gain and meet the industry's ultra-high brightness requirements for display screens.

[0056] The brightness enhancement film 1 is formed by coating optical glue on the light-incoming side and the light-outgoing side of the base layer 11, and then performing embossing and light curing to form a double-sided brightness enhancement structure. Specifically, in the application, the specific preparation steps of the brightness enhancement film 1 are as follows:

[0057] Step 1: cleaning the substrate: using plasma wind to remove static electricity on the surface of the substrate 11;

[0058] Step 2: Double-sided coating: The light-emitting side of the base layer 11 is coated with transparent optical glue with a refractive index of 1.5-1.6, and the light-incident side of the base layer 11 is coated with transparent optical glue with a refractive index of 1.2-1.3, with a thickness of 25 μm-45 μm;

[0059] Step 3: Double-sided embossing: using mold embossing to transfer the triangular prism matrix structure to the light incident side and the light exit side of the base layer 11;

[0060] Step 4: Double-sided curing: using UV light to irradiate the light-incoming side and the light-outgoing side of the base layer 11, so that the double-sided structure formed by one-time coating is cured;

[0061] Step 5: Secondary coating: Secondary coating of transparent optical glue with a refractive index of 1.5-1.6 on the light incident surface of the base layer 11, the optical glue is filled between the triangular prism structures formed by the primary coating on the light incident surface of the base layer 11;

[0062] Step 6: Secondary curing: Use UV light to irradiate the light incident surface of the base layer 11 for a second time, and cure the high refractive index glue filled for a second time to form a triangular prism structure arrangement with alternating high and low refractive indices.

[0063] Thus, when preparing the brightness enhancement film 1, after removing the static electricity on the surface of the base layer 11 by plasma wind, a transparent optical glue with a thickness of 25 μm-45 μm is coated on the light-emitting side and the light-entering side of the base layer 11, wherein the transparent optical glue with a refractive index of 1.5-1.6 is coated on the light-emitting side of the base layer 11, and the transparent optical glue with a refractive index of 1.2-1.3 is coated on the light-entering side of the base layer 11. The triangular prism matrix structure is transferred to the light-entering side and the light-emitting side of the base layer 11 by mold embossing, and then, UV light is irradiated on the light incident side and the light output side of the base layer 11 to solidify the double-sided structure formed by the first coating. Then, a transparent optical glue with a refractive index of 1.5-1.6 is coated on the light incident surface of the base layer 11 for a second time, and the optical glue is filled between the triangular prism structures formed by the first coating on the light incident surface of the base layer 11. Finally, UV light is used to irradiate the light incident surface of the base layer 11 for a second time, and the high refractive index glue filled by the second coating is solidified to form a triangular prism structure arrangement with alternating high and low refractive indices, wherein the transparent optical glue is preferably a UV-curable glue.

[0064] In addition, the utility model also provides a display device, the display device includes a display module, the specific structure of the display module, with reference to the above embodiment, the specific structure of the display module is as follows: Fig.10 As shown, it can be understood that since the display device of the utility model adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0065] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A brightness enhancement film, characterized in that: It comprises a base layer, a first refractive light-gathering layer arranged on the light-emitting side of the base layer, and a second refractive light-gathering layer arranged on the light-incident side of the base layer, wherein: The first refractive light-focusing layer includes at least one first protruding column; The second refractive light-focusing layer includes at least one second protruding column and at least one third protruding column, and the second protruding column and the third protruding column are complementary; The axis direction of the first protruding column and the axis direction of the second protruding column are arranged at a certain angle.

2. The brightness enhancement film according to claim 1, characterized in that: One side of the second protruding column is in contact with the base layer, and the third protruding column is arranged on the other side of the second protruding column away from the base layer; The refractive index of the second protruding column is lower than that of the third protruding column.

3. The brightness enhancement film according to claim 1, characterized in that: The first protruding column includes a prism or an arc-shaped column, the second protruding column includes a prism or an arc-shaped column, and the third protruding column includes a prism or an arc-shaped column.

4. The brightness enhancement film according to claim 3, characterized in that: The first protruding column includes a first triangular prism, wherein a plurality of the first triangular prisms are provided and arranged in sequence along the axis direction of the second protruding column, a side surface of each of the first triangular prisms is attached to the base layer to jointly cover the light emitting side of the base layer, and the refractive index of the first triangular prisms is lower than that of air; The second protruding column includes a second triangular prism, and the second triangular prism is provided in plurality and arranged in sequence along the axial direction of the first protruding column. The third protruding column includes a third triangular prism, and the third triangular prism is provided in plurality and respectively embedded between two adjacent second triangular prisms. One side surface of each second triangular prism is bonded to the base layer to jointly cover the light incident side of the base layer. Two adjacent third triangular prisms jointly cover the second triangular prism located therebetween, wherein the refractive index of the second triangular prism is lower than that of the third triangular prism.

5. The brightness enhancement film according to claim 4, characterized in that: The cross section of the first triangular prism is an isosceles triangle, and the bottom side of the cross section of the first triangular prism is in contact with the base layer; The cross sections of the second triangular prism and the third triangular prism are both set to be isosceles triangles, and the bottom side of the cross section of the second triangular prism is in contact with the base layer, and the bottom side of the cross section of the third triangular prism is parallel to the base layer.

6. The brightness enhancement film according to claim 4, characterized in that: The vertex angles of the cross sections of the first triangular prism, the second triangular prism, and the third triangular prism are set to ɑ, and 87°≤ɑ≤93°.

7. The brightness enhancement film according to claim 4, characterized in that: In the axial direction of the first protruding column, the distance between the tops of two adjacent third triangular prisms is L1, and 50 μm≤L1≤90 μm; and / or, In the axial direction of the second protruding column, the distance between the tops of two adjacent first triangular prisms is L2, and 50 μm≤L2≤90 μm.

8. The brightness enhancement film according to claim 1, characterized in that: The material of the base layer is set to be any one of polyethylene terephthalate, polystyrene and polycarbonate.

9. The brightness enhancement film according to claim 1, characterized in that: The thickness of the first refraction and light-condensing layer and the second refraction and light-condensing layer is S, and 25 μm≤S≤45 μm.

10. A display module, characterized in that: include: The screen body is arranged in a rectangular shape; A backlight module is arranged on one side of the screen in the thickness direction; as well as, At least one brightness enhancement film is arranged between the screen body and the backlight module, and the brightness enhancement film is the brightness enhancement film as described in any one of claims 1 to 9. The at least one brightness enhancement film includes a first brightness enhancement film, and the axial direction of the first protruding column of the first brightness enhancement film and the axial direction of the second protruding column are set to the diagonal direction of the screen body.

11. The display module according to claim 10, wherein: A second brightness enhancement film is further arranged between the screen body and the backlight module, and the axis direction of the first protruding column and the axis direction of the second protruding column of the second brightness enhancement film are arranged along two side lines of the screen body.

12. A display device, characterized in that: Comprising the display module as claimed in claim 11.

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