CN105319626A - Optical film and display device - Google Patents
Optical film and display device Download PDFInfo
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- CN105319626A CN105319626A CN201510755800.9A CN201510755800A CN105319626A CN 105319626 A CN105319626 A CN 105319626A CN 201510755800 A CN201510755800 A CN 201510755800A CN 105319626 A CN105319626 A CN 105319626A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
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Abstract
The invention provides an optical film and a display device. The optical film comprises a lens layer having a planar structure bottom, and composed of a microlens array, wherein the microlens array comprises a plurality of lens structures arranged in a first direction, and the first direction is parallel with the bottom; and a prism layer arranged on the lens layer distant from the bottom, and composed of a microprism array, wherein the microprism array comprises a plurality of prism structures arranged in the first direction, and the vertex angles of the prism structures are chamferings. The vertical distance between the focus point of a lens structure and the bottom is f; the vertical distance between the extension surface intersecting line of sides of a prism structure and the bottom is H, and f>1/2H. According to the invention, the top ends of the prism structures can drop in dark areas, forcing all rays of light to penetrate through the inclined surfaces of the prism structures, thereby avoiding beam angle convergence decrease of the optical film caused by curved top ends, and allowing the optical film to possess higher optical gains as well as greater wearability.
Description
Technical field
The present invention relates to thin film technique field, in particular to a kind of optical thin film and display device.
Background technology
The optical thin film as brightness enhancement film be arranged in flat-panel screens is generally used for the light intensity improving display forward.The topmost use difficult point of above-mentioned optical thin film is that surface micro-structure is subject to outside destroy, thus causes the flaw of picture.In order to improve the picture display effect of optical thin film, generally need the abrasion-resistant scratch resistance characteristic improving Optical Coatings Surface, usually following disposal route is adopted to realize at present: the first disposal route is that the second disposal route is to improve Wear Resistance with the material of the shape that can resile voluntarily by prism vertex angle passivation is promoted wearing quality with the possibility reducing microstructure destroyed.
For the first disposal route, although drift angle radius-of-curvature is larger, or straight angle region is wider, wearing quality is better, thus by changing external form, reduce the possibility that prism tip is destroyed, but there is radius-of-curvature due to drift angle place, cause cambered surface, this cambered surface cannot be parallel with prism structure inclined-plane, thus cause fillet place emergent light angle and inclined-plane emergent light angle inconsistent, and then the degree of convergence of overall emergent light angle is deteriorated, reduces the positive visual angle optical gain effect of optical thin film.
And for the second disposal route, though prism vertex angle structural intergrity can be kept, but existing its refractive index of resilient material being applicable to brightness enhancement film processing procedure is far below not having the refractive index of resilient material, therefore, its optics benefit of wear-resisting optical thin film with wear-resisting functions reduces greatly compared to not having a product of wear-resisting functions.
In order to overcome the problems referred to above, in prior art, need the higher and optical thin film that wearing quality is good of a kind of optical gain badly.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of optical thin film and display device, to solve the problem that optical thin film of the prior art cannot can also have high light gain while having compared with high-wearing feature.
To achieve these goals, according to an aspect of the present invention, a kind of optical thin film is provided, comprise: lens jacket, there is the bottom surface of planar structure, and be made up of microlens array, microlens array comprises multiple lens arrangement along first direction arrangement, and first direction is parallel to bottom surface; Layers of prisms, layers of prisms is arranged on lens jacket away from bottom surface, and layers of prisms is made up of microprism array, and microprism array comprises multiple prism structure along first direction arrangement, and the drift angle of prism structure is chamfering; The focus of lens arrangement and the vertical range of bottom surface are f, and the extended surface intersection of the side of prism structure and the vertical range of bottom surface are H, and
Further, when at least one focus is in prism structure, the peak that the light of formation focus is crossing with prism structure is a some C
1, some C
1for the tie point of side and chamfering, now the vertical range of focus and described bottom surface is h
1; When focus is all when prism structure is outer, the peak that the light of formation focus is crossing with prism structure is a some C
2, and some C
2for the tie point of side and chamfering, now the vertical range of focus and described bottom surface is h
2; Wherein, h
1≤ f≤h
2.
Further, the refractive index of lens jacket is n
1, the refractive index of layers of prisms is n
2, n
1and n
2meet
wherein, r is the radius-of-curvature of lens arrangement.
Further, the corresponding even number lens arrangement of each prism structure is arranged.
Further, in a first direction, the length of lens arrangement is identical with the length of prism structure, and lens arrangement and prism structure shift to install.
Further, the drift angle of prism structure is arranged corresponding to the joining place of adjacent lens structure.
Further, lens arrangement is plano-convex lens, and the protuberance of plano-convex lens is towards layers of prisms, and n
1be greater than n
2; Lens arrangement is plano-concave lens, and the recess of plano-concave lens is towards layers of prisms, and n
1be less than n
2.
Further, the material of formation lens jacket and layers of prisms is independently selected from any one in the group of polyethylene terephthalate, polypropylene, polyacrylate, polycarbonate, polymethylmethacrylate and polyethylene vinyl acetoacetic ester composition separately.
Further, optical thin film also comprises transparent substrate layer, transparent substrate layer be arranged on lens jacket away from the surface of layers of prisms.
According to a further aspect in the invention, provide display device, comprise optical thin film, optical thin film is above-mentioned optical thin film.
Apply technical scheme of the present invention, the invention provides a kind of optical thin film comprising lens jacket and layers of prisms, layers of prisms is covered on lens jacket, and the drift angle of the vertical cross-section of prism structure is fillet, because this lens jacket is made up of microlens array, thus on lens jacket, form the dark space that dull thread enters and the clear zone having light by focus, and by regulating the refractive index of lens jacket and layers of prisms, the focus of lens arrangement is made to be positioned at more than 1/2 height of prism structure (namely
), thus can the top of prism structure be fallen among dark space, namely light cannot enter this apex zone, light is forced all to penetrate via the skew back face of prism structure, and then the rising angle of optical thin film convergence effect is not declined because its top is curved surface, achieve the high light gain that optical thin film also has while having compared with high-wearing feature.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The Figure of description forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
A kind of focal length that Fig. 1 shows embodiment of the present invention to be provided equals h
1and lens arrangement is the diagrammatic cross-section of the partial structurtes of the optical thin film of plano-convex lens;
The another kind of focal length that Fig. 2 shows embodiment of the present invention to be provided equals h
1and lens arrangement is the diagrammatic cross-section of the partial structurtes of the optical thin film of plano-convex lens;
A kind of focal length that Fig. 3 shows embodiment of the present invention to be provided equals h
2and lens arrangement is the diagrammatic cross-section of the partial structurtes of the optical thin film of plano-convex lens;
The another kind of focal length that Fig. 4 shows embodiment of the present invention to be provided equals h
2and lens arrangement is the diagrammatic cross-section of the partial structurtes of the optical thin film of plano-convex lens;
The focal length that Fig. 5 shows embodiment of the present invention to be provided equals h
1and lens arrangement is the diagrammatic cross-section of the partial structurtes of the optical thin film of plano-concave lens;
The focal length that Fig. 6 shows embodiment of the present invention to be provided equals h
2and lens arrangement is the diagrammatic cross-section of the partial structurtes of the optical thin film of plano-concave lens;
A kind of lens arrangement that Fig. 7 shows embodiment of the present invention to be provided is the cross-sectional view of the optical thin film of plano-convex lens;
A kind of lens arrangement that Fig. 8 shows embodiment of the present invention to be provided is the cross-sectional view of the optical thin film of plano-concave lens;
The another kind of lens arrangement that Fig. 9 shows embodiment of the present invention to be provided is the cross-sectional view of the optical thin film of plano-convex lens; And
Another lens arrangement that Figure 10 shows embodiment of the present invention to be provided is the cross-sectional view of the optical thin film of plano-convex lens.
Embodiment
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that embodiments of the invention described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
As what introduce in background technology, in prior art, need the higher and optical thin film that wearing quality is good of a kind of optical gain badly.The present inventor studies for the problems referred to above, propose a kind of optical thin film, as shown in Figures 1 to 6, this optical thin film comprises lens jacket and layers of prisms, wherein, lens jacket is made up of microlens array, and there is the bottom surface of planar structure, microlens array comprises multiple lens arrangement 10 along first direction arrangement, first direction is parallel to bottom surface, and layers of prisms is arranged on lens jacket away from bottom surface, and layers of prisms is made up of microprism array, microprism array comprises multiple prism structure 20 along first direction arrangement, and the drift angle of prism structure 20 is for falling chamfering; The focus 30 of lens arrangement 10 is f with the vertical range of bottom surface, and the extended surface intersection of the side of prism structure 20 and the vertical range of bottom surface are H, and
Because lens jacket is made up of column lens array in above-mentioned optical thin film, thus on lens jacket, form the dark space (shadow region namely in Fig. 1 to 6) that dull thread enters and the clear zone having light by focus, and by regulating the refractive index of lens jacket and layers of prisms, the focus of lens arrangement is made to be positioned at more than 1/2 height of prism structure, thus can the top of prism structure be fallen among dark space, namely light cannot enter this apex zone, light is forced all to penetrate via the skew back face of prism structure, and then the convergence effect of optical thin film rising angle is not declined because its top is curved surface, achieve the high light gain that optical thin film also has while having compared with high-wearing feature.
Stating on the invention in optical thin film, can be that f optimizes further to the vertical range of the focus 30 of lens arrangement 10 and bottom surface.When at least one focus 30 is in prism structure 20, form the light of this focus 30 peak crossing with prism structure 20 for a some C
1, some C
1for the tie point of side and chamfering, now the vertical range of focus and described bottom surface is h
1, when chamfering is fillet, tie point is the point of contact of side and fillet, and the cross-sectional view of each prism structure 20 is as shown in Figure 1, Figure 2 with shown in Fig. 5; When focus 30 is all outside prism structure 20, the peak that the light of formation focus 30 is crossing with prism structure 20 is a some C
2, some C
2for the tie point of side and chamfering, now the vertical range of focus and described bottom surface is h
2, when chamfering is fillet, tie point is the point of contact of side and fillet, and the cross-sectional view of each prism structure 20 is as shown in Fig. 3, Fig. 4 and Fig. 6; Wherein, h
1≤ f≤h
2.Preferably, the focus 30 of lens arrangement 10 and the vertical range f of bottom surface get between above-mentioned maximal value and minimum value, can ensure that the top (i.e. fillet part) of prism structure 20 falls among dark space completely, thus light all can be penetrated via the skew back face of prism structure 20, improve the convergence effect of optical thin film rising angle, making optical thin film while having compared with high-wearing feature, further increase the optical gain of optical thin film.
State on the invention in optical thin film, the refractive index of lens jacket is n
1, the refractive index of layers of prisms is n
2, in order to make the focus 30 of lens arrangement 10 be positioned at more than 1/2 height of prism structure 20, thus the top of prism structure 20 is fallen among dark space, can by being optimized the refractive index of lens jacket and the refractive index of layers of prisms.Preferably, n is made
1and n
2meet
wherein, r is the radius-of-curvature of lens arrangement 10.Because the vertical range f between the focal length of lens jacket and its bottom surface meets
thus by making n
1and n
2meet
more than 1/2 height of prism structure 20 can be positioned at by vertical range f between the focal length of lens jacket and its bottom surface.
State on the invention in optical thin film, the lens arrangement 10 in lens jacket can be plano-convex lens, and namely the protuberance of plano-convex lens is towards layers of prisms, now n
1be greater than n
2, as shown in Figures 1 to 4; Lens arrangement 10 can also be plano-concave lens, and namely the recess of plano-concave lens is towards layers of prisms, now n
1be less than n
2, as illustrated in Figures 5 and 6.Those skilled in the art according to the actual requirements, can determine n by selecting different materials
1in n
2between size, thus determine that lens arrangement 10 is for plano-convex lens or plano-concave lens.
State on the invention in optical thin film, preferably, the material of lens jacket and layers of prisms is independently selected from any one in the group of polyethylene terephthalate, polypropylene, polyacrylate, polycarbonate, polymethylmethacrylate and polyethylene vinyl acetoacetic ester composition separately; Preferably, polyacrylate accounts for more than 1/2 of the percentage by weight of lens jacket and/or layers of prisms.Above-mentioned preferred material is transparent material, thus can make light more effectively through lens jacket and layers of prisms, ensure that the high light gain that optical thin film can have.
State on the invention in optical thin film, optical thin film also comprises transparent substrate layer, transparent substrate layer be arranged on lens jacket away from the surface of layers of prisms.The material of substrate layer can be selected from any one in the group of polyethylene terephthalate, polypropylene, polycarbonate, polymethylmethacrylate and polyethylene vinyl acetoacetic ester composition.Above-mentioned preferred material is transparent material, thus can make light more effectively through substrate layer, ensure that the high light gain that optical thin film can have.
Equally, in order to make the focus 30 of lens arrangement 10 be positioned at more than 1/2 height of prism structure 20, thus the top of prism structure 20 being fallen among dark space, can also be optimized the structure of optical thin film.In a preferred embodiment, the corresponding even number lens arrangement 10 of each prism structure 20 is arranged, and its structure as shown in FIG. 7 and 8.In another preferred embodiment, identical with the length of prism structure 20 in the length of the lens arrangement 10 of first direction, and lens arrangement 10 shifts to install along first direction and prism structure 20, its structure is as shown in Figure 9.More preferably, the drift angle of prism structure 20 is arranged corresponding to the joining place of adjacent lens structure 10, and its structure as shown in Figure 10.Adopt the structure of above-mentioned optical thin film, and adjustment is carried out to the refractive index of lens jacket in optical thin film and layers of prisms can effectively make the top of prism structure 20 fall among dark space.
According to a further aspect in the invention, provide a kind of display device, this display device comprises above-mentioned optical thin film.Because the top of prism structure 20 can fall among dark space by above-mentioned optical thin film, light is forced all to penetrate via the skew back face of prism structure 20, thus the high light gain had compared with also having while high-wearing feature, and then the above-mentioned display device comprising above-mentioned optical thin film is enable to have higher surperficial reliability and light extraction efficiency.
The optical thin film that the application provides is further illustrated below in conjunction with embodiment and comparative example.
Optical thin film in following embodiment is the structure of corresponding 8 lens of a prism as shown in Figure 2, and the difference of each embodiment is only that the radius-of-curvature of lens face is different.Those skilled in the art can carry out the shape (as concave lens, convex lens, multiaspect lens) of lens, the change of lens numbers, the change of radius-of-curvature, the change of lens and Refractive Index of Glass Prism or the change carrying out above combining according to embodiment content and obtain different versions, illustrate no longer in detail here.
Embodiment 1
The optical thin film that the present embodiment provides comprises:
Lens jacket, has the bottom surface of planar structure, is made up of microlens array, and microlens array comprises multiple lens arrangement along first direction arrangement, and lens arrangement is plano-convex lens, lens face radius-of-curvature r=15 μm, lens jacket refractive index n
1=1.65, and first direction is parallel to bottom surface;
Layers of prisms, layers of prisms is arranged on lens jacket away from bottom surface, and layers of prisms is made up of microprism array, and microprism array comprises multiple prism structure along first direction arrangement, layers of prisms refractive index n
2=1.35, the extended surface intersection of the side of prism structure and the vertical range H=28 μm of bottom surface, and the drift angle of prism structure is fillet, fillet radius-of-curvature is 5 μm (R5);
Wherein, the material forming lens jacket is polypropylene, and the material forming layers of prisms is polyacrylate.
Embodiment 2
The optical thin film that the present embodiment provides comprises:
Lens jacket, has the bottom surface of planar structure, is made up of microlens array, and microlens array comprises multiple lens arrangement along first direction arrangement, and lens arrangement is plano-convex lens, lens face radius-of-curvature r=9 μm, lens jacket refractive index n
1=1.65, and first direction is parallel to bottom surface;
Layers of prisms, layers of prisms is arranged on lens jacket away from bottom surface, and layers of prisms is made up of microprism array, and microprism array comprises multiple prism structure along first direction arrangement, layers of prisms refractive index n
2=1.35, the extended surface intersection of the side of prism structure and the vertical range H=28 μm of bottom surface, and the drift angle of prism structure is fillet, fillet radius-of-curvature is 5 μm (R5);
Wherein, lens jacket is formed identical with embodiment 1 with the material of layers of prisms.
Embodiment 3
The optical thin film that the present embodiment provides comprises:
Lens jacket, has the bottom surface of planar structure, is made up of microlens array, and microlens array comprises multiple lens arrangement along first direction arrangement, and lens arrangement is plano-convex lens, lens face radius-of-curvature r=6 μm, lens jacket refractive index n
1=1.65, and first direction is parallel to bottom surface;
Layers of prisms, layers of prisms is arranged on lens jacket away from bottom surface, and layers of prisms is made up of microprism array, and microprism array comprises multiple prism structure along first direction arrangement, layers of prisms refractive index n
2=1.35, the extended surface intersection of the side of prism structure and the vertical range H=28 μm of bottom surface, and the drift angle of prism structure is fillet, fillet radius-of-curvature is 5 μm (R5);
Wherein, lens jacket is formed identical with embodiment 1 with the material of layers of prisms.
Embodiment 4
The optical thin film that the present embodiment provides comprises:
Lens jacket, has the bottom surface of planar structure, is made up of microlens array, and microlens array comprises multiple lens arrangement along first direction arrangement, and lens arrangement is plano-convex lens, lens face radius-of-curvature r=3.5 μm, lens jacket refractive index n
1=1.65, and first direction is parallel to bottom surface;
Layers of prisms, layers of prisms is arranged on lens jacket away from bottom surface, and layers of prisms is made up of microprism array, and microprism array comprises multiple prism structure along first direction arrangement, layers of prisms refractive index n
2=1.35, the extended surface intersection of the side of prism structure and the vertical range H=28 μm of bottom surface, and the drift angle of prism structure is fillet, fillet radius-of-curvature is 5 μm (R5);
Wherein, lens jacket is formed identical with embodiment 1 with the material of layers of prisms.
Comparative example 1
The optical thin film section that the present embodiment provides is individual layer prism structure, layers of prisms refractive index n
2=1.35, the extended surface intersection of the side of prism structure and the vertical range H=28 μm of bottom surface, and the drift angle of prism structure is 90 degree of wedge angles (R0); The material forming layers of prisms is identical with embodiment 1.
Comparative example 2
The optical thin film section that the present embodiment provides is individual layer prism structure, layers of prisms refractive index n
2=1.35, the extended surface intersection of the side of prism structure and the vertical range H=28 μm of bottom surface, and the drift angle of prism structure is fillet, fillet radius-of-curvature is 3 μm (R3); The material forming layers of prisms is identical with embodiment 1.
Comparative example 3
The optical thin film section that the present embodiment provides is individual layer prism structure, layers of prisms refractive index n
2=1.35, the extended surface intersection of the side of prism structure and the vertical range H=28 μm of bottom surface, and the drift angle of prism structure is fillet, fillet radius-of-curvature is 5 μm (R5); The material forming layers of prisms is identical with embodiment 1.
Test the optical gain performance of the optical thin film that above-described embodiment 1 to 4 and comparative example 1 to 3 provide, test result is as follows:
The major parameter of above-described embodiment 1 to 4 and comparative example 1 to 3 arranges as following table:
| Prism vertex angle | Refractive Index of Glass Prism (n 2) | Structure height (H) | The index of refraction in lens (n 1) | Lens face radius-of-curvature (r) | |
| Comparative example 1 | R0 | 1.35 | 28μm | - | - |
| Comparative example 2 | R3 | 1.35 | 28μm | - | - |
| Comparative example 3 | R5 | 1.35 | 28μm | - | - |
| Embodiment 1 | R5 | 1.35 | 28μm | 1.65 | 15μm |
| Embodiment 2 | R5 | 1.35 | 28μm | 1.65 | 9μm |
| Embodiment 3 | R5 | 1.35 | 28μm | 1.65 | 6μm |
| Embodiment 4 | R5 | 1.35 | 28μm | 1.65 | 3.5μm |
Each embodiment above-mentioned and the brightness enhancement film of comparative example are assembled into backlight module (ensureing that other structure in backlight module is all identical), use the measurement of BM-7 YC to measure the positive visual angle optical gain of each backlight module, test result is as shown in the table:
| Optical gain | |
| Comparative example 1 | 1.50 |
| Comparative example 2 | 1.47 |
| Comparative example 3 | 1.43 |
| Embodiment 1 | 1.44 |
| Embodiment 2 | 1.50 |
| Embodiment 3 | 1.49 |
| Embodiment 4 | 1.45 |
Compared to comparative example 1, in comparative example 2 and 3, prism vertex angle is replaced wedge angle by fillet, when fillet radius-of-curvature is larger, brightness enhancement film antiwear characteristic is better, but optical gain is poorer.Embodiment 1 to 4 is in contrast to comparative example 1 to 3, in embodiment 1 to 4, adds a lens jacket, when lens radius of curvature (r) is by large gradually little, focal length also from away from lens end gradually near lens end.The focal length of embodiment 1 is greater than aforementioned h
2, optical gain effect is poor, but still is better than comparative example 3.The focal length of embodiment 2 is less than aforementioned h
2, and falling within outside prism structure, optical gain effect is better.The focal length of embodiment 3 is greater than aforementioned h
1, and falling within prism structure, optical gain effect is better.The focal length of embodiment 4 is less than aforementioned h
1, optical gain effect is poor, but still is better than comparative example 3.And in embodiment 2 and 3, when focal length is between h
1to h
2between time, optical gain can close to the comparative example 1 of pinnacle angle prism.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
The invention provides a kind of optical thin film comprising lens jacket and layers of prisms, layers of prisms is covered on lens jacket, and the drift angle of the vertical cross-section of prism structure is fillet, because this lens jacket is made up of column lens array, thus on lens jacket, form the dark space that dull thread enters and the clear zone having light by focus, and by regulating the refractive index of lens jacket and layers of prisms, the focus of lens arrangement is made to be positioned at more than 1/2 height of prism structure, thus can the top of prism structure be fallen among dark space, namely light cannot enter this apex zone, light is forced all to penetrate via the skew back face of prism structure, and then the rising angle of optical thin film convergence effect is not declined because its top is curved surface, achieve the high light gain that optical thin film also has while having compared with high-wearing feature.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an optical thin film, comprising:
Lens jacket, has the bottom surface of planar structure, and is made up of microlens array, and described microlens array comprises multiple lens arrangement (10) along first direction arrangement, and described first direction is parallel to described bottom surface;
Layers of prisms, described layers of prisms is arranged on described lens jacket away from described bottom surface, described layers of prisms is made up of microprism array, described microprism array comprises multiple prism structure (20) arranged along described first direction, and the drift angle of described prism structure (20) is chamfering;
It is characterized in that, the focus (30) of described lens arrangement (10) and the vertical range of described bottom surface are f, and the extended surface intersection of the side of described prism structure (20) and the vertical range of described bottom surface are H, and
2. optical thin film according to claim 1, is characterized in that,
When focus described at least one (30) is in described prism structure (20), form the light of described focus (30) peak crossing with described prism structure (20) for a some C
1, and described some C
1for the tie point of described side and described chamfering, now the vertical range of described focus and described bottom surface is h
1;
When described focus (30) is all when described prism structure (20) is outer, form the light of described focus (30) peak crossing with described prism structure (20) for a some C
2, and described some C
2for the tie point of described side and described chamfering, now the vertical range of described focus and described bottom surface is h
2;
Wherein, h
1≤ f≤h
2.
3. optical thin film according to claim 1 and 2, is characterized in that, the refractive index of described lens jacket is n
1, the refractive index of described layers of prisms is n
2, described n
1with described n
2meet
wherein, r is the radius-of-curvature of described lens arrangement (10).
4. according to the optical thin film that claim 3 is stated, it is characterized in that, lens arrangement (10) described in the corresponding even number of each described prism structure (20) is arranged.
5. according to the optical thin film that claim 3 is stated, it is characterized in that, in said first direction, the length of described lens arrangement (10) is identical with the length of described prism structure (20), and described lens arrangement (10) and described prism structure (20) shift to install.
6. according to the optical thin film that claim 5 is stated, it is characterized in that, the drift angle of described prism structure (20) is arranged corresponding to the joining place of adjacent described lens arrangement (10).
7. optical thin film according to claim 3, is characterized in that,
Described lens arrangement (10) is plano-convex lens, and the protuberance of described plano-convex lens is towards described layers of prisms, and described n
1be greater than described n
2;
Described lens arrangement (10) is plano-concave lens, and the recess of described plano-concave lens is towards described layers of prisms, and described n
1be less than described n
2.
8. optical thin film according to claim 1 and 2, it is characterized in that, the material forming described lens jacket and described layers of prisms is independently selected from any one in the group of polyethylene terephthalate, polypropylene, polyacrylate, polycarbonate, polymethylmethacrylate and polyethylene vinyl acetoacetic ester composition separately.
9. optical thin film according to claim 1 and 2, is characterized in that, described optical thin film also comprises transparent substrate layer, and described transparent substrate layer is arranged on the surface away from described layers of prisms of described lens jacket.
10. a display device, comprises optical thin film, it is characterized in that, the optical thin film of described optical thin film according to any one of claim 1 to 9.
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|---|---|---|---|
| CN201510755800.9A CN105319626B (en) | 2015-11-09 | 2015-11-09 | Optical thin film and display device |
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|---|---|---|---|
| CN201510755800.9A CN105319626B (en) | 2015-11-09 | 2015-11-09 | Optical thin film and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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