CN104950361A - Optical thin film and backlight unit - Google Patents
Optical thin film and backlight unit Download PDFInfo
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- CN104950361A CN104950361A CN201510391278.0A CN201510391278A CN104950361A CN 104950361 A CN104950361 A CN 104950361A CN 201510391278 A CN201510391278 A CN 201510391278A CN 104950361 A CN104950361 A CN 104950361A
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Abstract
The invention provides an optical thin film and a backlight unit. The optical thin film comprises a plurality of stacked transparent material layers, wherein a first composite structure layer is arranged between at least two adjacent transparent material layers and comprises a first bulge structure and a second bulge structure covering the first bulge structure, the first bulge structure comprises a plurality of first bulge parts sequentially arranged in the a direction, the second bulge structure comprises a plurality of second bulge parts sequentially arranged in the a direction, the first bulge parts and the second bulge parts penetrate through the transparent material layers in the b direction, the a direction and the b direction are perpendicular to each other and are parallel to the extending surface of each transparent material layer, each second bulge part covers at least one first bulge part, an air channel is formed by a gap between every two adjacent second bulge parts, and the first bulge structure and the second bulge structure have different refractive indexes. The optical thin film has good shielding performance, and the probability of occurrence of phenomena of moire interference, newton ring and the like is lower.
Description
Technical field
The present invention relates to optical technical field, in particular to a kind of optical thin film and back light unit.
Background technology
Along with the development of information age, occurred the such as flat-panel monitor of active matrix-type liquid crystal display device (LCD), plasma display (PDP), electroluminescent display (EL) and Field Emission Display (FED) and so on, these displays have slim body, the excellent performance such as lightweight and low in energy consumption.Wherein, LCD is due to high-contrast and be suitable for the characteristic showing mobile image, replaces cathode-ray tube (CRT) (CRT) to be widely used in notebook computer, monitor, TV etc.
Do not comprise light source in LCD, therefore need extra light source.The below such as back light unit comprising light source being arranged on liquid crystal panel, to provide light to this liquid crystal panel, makes LCD can by from the light display image of this back light unit.Prism and lower prism is provided with in this back light unit, in order to improve the brightness of light in back light unit, usual use two optical thin film superpositions, namely go up optical thin film and lower optical thin film fits together, and the projection of the projection of upper optical thin film and lower optical thin film is arranged in the same way.But now go up between the projection of optical thin film and the projection of lower optical thin film and form gap, foreign matter easily enters this gap, thus have impact on the normal conduction of light.As Chinese patent CN201320460004.9 in prior art, by filling barrier between upper optical thin film and lower optical thin film, thus the gap between upper optical thin film and lower optical thin film is closed, serve and intercept extraneous foreign matter and enter the effect of complex optical film, and then ensure that the normal conduction of light and the good display effect of LCD.
But, owing to being provided with barrier in optical thin-film structure in prior art, can impact the conduction of light in whole optical thin film, thus reduce the conduction efficiency of light in back light unit, and the restriction of barrier material also can cause the shielding of optical thin-film structure poor.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of optical thin film and back light unit, to improve the conduction efficiency of light in optical thin film, and makes optical thin film have good shielding.
To achieve these goals, according to an aspect of the present invention, provide a kind of optical thin film, this optical thin film comprises the transparent material layer of multiple stacked setting, and be provided with the first composite construction layer between at least two adjacent transparent material layers, first composite construction layer comprises the first bulge-structure and is covered in the second bulge-structure on the first bulge-structure, first bulge-structure comprises multiple the first lug boss set gradually along a direction, second bulge-structure comprises multiple the second lug boss set gradually along a direction, first lug boss and the second lug boss all run through transparent material layer along b direction, a direction is vertical with b direction, a direction and b direction are all parallel to the extensional surface of transparent material layer, each second lug boss is covered at least one first lug boss, space between adjacent second lug boss forms air duct, and the first bulge-structure and the second bulge-structure have different refractive indexes.
Further, each first lug boss spaced set successively in the first bulge-structure; Each second lug boss spaced set successively in second bulge-structure.
Further, the surface of outermost transparent material layer is provided with the second composite construction layer, second composite construction layer comprises the 3rd bulge-structure and is covered in the 4th bulge-structure on the 3rd bulge-structure, 3rd bulge-structure comprises multiple the 3rd lug boss along a direction successively spaced set, 4th bulge-structure comprises multiple the 4th lug boss along a direction successively spaced set, 3rd lug boss and the 4th lug boss all extended on transparent material layer along b direction, each 4th lug boss is covered at least one the 3rd lug boss, and the 3rd bulge-structure and the 4th bulge-structure have different refractive indexes.
Further, each 3rd lug boss spaced set successively in the 3rd bulge-structure; Each 4th lug boss spaced set successively in 4th bulge-structure.
Further, the specific refractivity of the first bulge-structure and the second bulge-structure is greater than 0.02; The specific refractivity of the 3rd bulge-structure and the 4th bulge-structure is greater than 0.02.
Further, be the first vertical cross-section perpendicular to the arbitrary section in b direction in each air duct, the shape of the first vertical cross-section comprises: triangle, and leg-of-mutton two base angles are chamfering; Trapezoidal; And by arc section and connect the annular shape that the straight-line segment of arc section forms.
Further, the distance between each air duct is less than 5 μm.
Further, arbitrary section perpendicular to b direction in the 3rd lug boss in the first lug boss in each first composite construction layer and each second composite construction layer is the second vertical cross-section, and the shape of the second vertical cross-section is isosceles triangle, or the second vertical cross-section is by arc section and connects the annular shape that the straight-line segment of arc section forms.
Further, the first bulge-structure and the 3rd bulge-structure are made up of any one or more being selected from acrylic copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate, polypropylene, polycarbonate, polymethylmethacrylate and polyethylene vinyl acetoacetic ester.
Further, the 4th lug boss in each second composite construction layer is the 3rd vertical cross-section perpendicular to the arbitrary section in b direction, and the shape of the 3rd vertical cross-section is isosceles triangle, or the 3rd vertical cross-section is by arc section and connects the shape that the straight-line segment of arc section forms.
Further, the second bulge-structure the 4th bulge-structure is made up of any one or more being selected from acrylic copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate, polypropylene, polycarbonate, polymethylmethacrylate and polyethylene vinyl acetoacetic ester.
Further, each transparent material layer is made up of any one or more being selected from acrylic copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate, polypropylene, polycarbonate, polymethylmethacrylate and polyethylene vinyl acetoacetic ester.
According to a further aspect in the invention, provide a kind of back light unit, this back light unit comprises light source, light guide plate and blooming piece, it is characterized in that, blooming piece comprises above-mentioned optical thin film.
Apply technical scheme of the present invention, the invention provides a kind of optical thin film comprising transparent material layer, and be provided with the first composite construction layer between at least two adjacent described transparent material layers, first composite construction layer comprises the first bulge-structure and is covered in the second bulge-structure on the first bulge-structure, each described second lug boss is covered on the first lug boss described at least one, and the first bulge-structure and the second bulge-structure have different refractive indexes, thus when incident light is by this transparent material layer, owing to having two-layer bulge-structure in transparent material layer, make light by the refraction of more direction and scattering, more refractions that light has and scattering angle not only make optical thin film have good shielding, and reduce a mole interference, the probability that the bad phenomenon such as Newton ring occur.
Accompanying drawing explanation
The Figure of description forming a application's part 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:
The shape that Fig. 1 shows the second vertical cross-section in the first lug boss that embodiment of the present invention provides is the shape be made up of arc section and the straight-line segment that connects arc section, and in each air duct, the shape of the first vertical cross-section is the vertical section structural representation of leg-of-mutton optical thin film;
The shape that Fig. 2 shows the second vertical cross-section in the first lug boss that embodiment of the present invention provides is triangle, and in each air duct, the shape of the first vertical cross-section is the vertical section structural representation of the optical thin film of the shape be made up of arc section and the straight-line segment that connects arc section;
The shape that Fig. 3 shows the second vertical cross-section in the 3rd lug boss that embodiment of the present invention provides is the shape be made up of arc section and the straight-line segment that connects arc section, and in the 4th lug boss, the shape of the 3rd vertical cross-section is the vertical section structural representation of leg-of-mutton optical thin film;
The shape that Fig. 4 shows the second vertical cross-section in the 3rd lug boss that embodiment of the present invention provides is triangle, and in the 4th lug boss, the shape of the 3rd vertical cross-section is the vertical section structural representation of the optical thin film of the shape be made up of arc section and the straight-line segment that connects arc section;
Fig. 5 shows the shielding design sketch of the optical thin film that the embodiment of the present invention 1 provides;
Fig. 6 shows the shielding design sketch of the optical thin film that comparative example 1 of the present invention provides.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application 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.
It should be noted that used term is only to describe embodiment here, and be not intended to the illustrative embodiments of restricted root according to the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative is also intended to comprise plural form, in addition, it is to be further understood that, " comprise " when using term in this manual and/or " comprising " time, it indicates existing characteristics, step, operation, device, assembly and/or their combination.
For convenience of description, here can usage space relative terms, as " ... on ", " in ... top ", " at ... upper surface ", " above " etc., be used for the spatial relation described as a device shown in the figure or feature and other devices or feature.Should be understood that, space relative terms is intended to comprise the different azimuth in use or operation except the described in the drawings orientation of device.Such as, " in other devices or structure below " or " under other devices or structure " will be positioned as after if the device in accompanying drawing is squeezed, being then described as the device of " above other devices or structure " or " on other devices or structure ".Thus, exemplary term " in ... top " can comprise " in ... top " and " in ... below " two kinds of orientation.This device also can other different modes location (90-degree rotation or be in other orientation), and relatively describe space used here and make respective explanations.
From background technology, barrier is provided with in optical thin-film structure in prior art, can impact the conduction of light in whole optical thin film, thus reduce the conduction efficiency of light in back light unit, and the restriction of barrier material also can cause the shielding of optical thin-film structure poor.The present inventor studies for the problems referred to above, provides a kind of optical thin film.As shown in Figures 1 to 4, this optical thin film comprises the transparent material layer 10 of multiple stacked setting, and be provided with the first composite construction layer between at least two adjacent transparent material layers 10, the second bulge-structure 30 that first composite construction layer comprises the first bulge-structure 20 and is covered on the first bulge-structure 20, first bulge-structure 20 comprises multiple the first lug boss set gradually along a direction, second bulge-structure 30 comprises multiple the second lug boss set gradually along a direction, first lug boss and the second lug boss all run through transparent material layer 10 along b direction, a direction is vertical with b direction, a direction and b direction are all parallel to the extensional surface of transparent material layer 10, each second lug boss is covered at least one first lug boss, space between adjacent second lug boss forms air duct 40, and the first bulge-structure 20 and the second bulge-structure 30 have different refractive indexes.
In above-mentioned optical thin film of the present invention, when incident light is by this transparent material layer, owing to having two-layer bulge-structure in transparent material layer, make light by the refraction of more direction and scattering, more refractions that light has and scattering angle not only make optical thin film have good shielding, and reduce the probability of the bad phenomenon generations such as mole interference, Newton ring.
In optical thin film provided by the invention, preferably, each first lug boss spaced set successively in the first bulge-structure 20, and each second lug boss spaced set successively in the second bulge-structure 30.First lug boss of above-mentioned spaced set and the second lug boss can be optimized the refractive direction inciding light in transparent material layer 10, further increase the shielding of optical thin film.
In optical thin film provided by the invention, the surface of outermost transparent material layer 10 can also be provided with the second composite construction layer, the 4th bulge-structure 60 that second composite construction layer comprises the 3rd bulge-structure 50 and is covered on the 3rd bulge-structure 50, 3rd bulge-structure 50 comprises multiple the 3rd lug boss along a direction successively spaced set, 4th bulge-structure 60 comprises multiple the 4th lug boss along a direction successively spaced set, 3rd lug boss and the 4th lug boss are all extended on transparent material layer 10 along b direction, each 4th lug boss is covered at least one the 3rd lug boss, and the 3rd bulge-structure 50 and the 4th bulge-structure 60 have different refractive indexes.The second composite construction layer covering transparent material layer 10 surface can be optimized the refractive direction of the light from transparent material layer 10 outgoing, also optimizes the shielding of optical thin film further.
Above-mentioned preferred embodiment in, more preferably, each 3rd lug boss spaced set successively in the 3rd bulge-structure 50, and each 4th lug boss spaced set successively in the 4th bulge-structure 60.3rd lug boss of above-mentioned spaced set and the 4th lug boss can be optimized further to the refractive direction of the light from transparent material layer 10 outgoing, more effectively improve the shielding of optical thin film.
Be the first vertical cross-section perpendicular to the arbitrary section in b direction in each air duct 40, the first vertical cross-section in each air duct 40 can set according to the instruction of the application, preferably, the shape of the first vertical cross-section comprises: triangle, leg-of-mutton two base angles are chamfering, above-mentioned triangle comprises various types of triangle, as oxygon, right-angle triangle, obtuse triangle, isosceles triangle and equilateral triangle; Trapezoidal, above-mentioned trapezoidal comprise various types of trapezoidal, as trapezoidal, right-angled trapezium and isosceles trapezoid; And by arc section and connect the annular shape that the straight-line segment of arc section form, the above-mentioned shape be made up of the straight-line segment of arc section and connection arc section comprises all kinds, in above-mentioned shape, the centering angle of arc section can for being less than 180 ° arbitrarily angled.Because the first vertical cross-section in each air layer has identical above-mentioned shape, thus can be optimized inciding the refractive direction of light in air layer, further increasing the shielding of optical thin film.
Above-mentioned preferred embodiment in, when the shape of the first vertical cross-section is triangle, the shape of the first vertical cross-section can be isosceles right triangle, and the straight-line segment between the base angle of isosceles right triangle is the first straight-line segment; When the shape of the first vertical cross-section is trapezoidal, the shape of the first vertical cross-section can be isosceles trapezoid, and going to the bottom of isosceles trapezoid is the first straight-line segment; When the first vertical cross-section is by arc section and connects shape that the straight-line segment of arc section form, the shape of the first vertical cross-section can be semicircle, and semicircular straight-line segment is the first straight-line segment; In optical thin film, page can have the first vertical cross-section of various shape.First vertical cross-section has above-mentioned preferred shape, can optimize the refractive direction inciding light in air layer further.
Preferably, the distance between each air duct 40 is less than 5 μm.Above-mentioned distance range can make to have the suitable air duct of quantity 40 in transparent material layer 10, thus can be optimized the refractive direction inciding light in transparent material layer 10, further increases the shielding of optical thin film.
Arbitrary section perpendicular to b direction in the 3rd lug boss in the first lug boss in each first composite construction layer and each second composite construction layer is the second vertical cross-section, second vertical cross-section can set according to the instruction of the application, preferably, second vertical cross-section is by arc section and connects the annular shape that the straight-line segment of arc section forms, its structure as shown in figures 1 and 3, or second the shape of vertical cross-section be isosceles triangle, its structure is as shown in Figure 2 and Figure 4.Because the second vertical cross-section in the first lug boss in each first composite construction layer has identical above-mentioned shape, the second vertical cross-section in the 3rd lug boss in each second composite construction layer has identical above-mentioned shape equally, thus can the refractive direction inciding light in transparent material layer 10 be optimized, further increase the shielding of optical thin film.
The 4th lug boss in each second composite construction layer is the 3rd vertical cross-section perpendicular to the arbitrary section in b direction, 3rd vertical cross-section can set according to the instruction of the application, preferably, the shape of the 3rd vertical cross-section is isosceles triangle, its structure as shown in Figure 3, or the 3rd vertical cross-section be by arc section and connect the shape that the straight-line segment of arc section forms, its structure is as shown in Figure 4.Because the 3rd vertical cross-section in the 4th lug boss in each second composite construction layer is forever positive, there is identical above-mentioned shape, thus can the refractive direction inciding light in transparent material layer 10 be optimized, further increase the shielding of optical thin film.
The material of the first bulge-structure 20 and the second bulge-structure 30 can set according to prior art, preferably, the material of the first bulge-structure 20 and the second bulge-structure 30 is any one or more in acrylic copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate, polypropylene, polycarbonate, polymethylmethacrylate and polyethylene vinyl acetoacetic ester, more preferably, the specific refractivity of the first bulge-structure 20 and the second bulge-structure 30 is greater than 0.02.The above-mentioned ranges of indices of refraction had between first bulge-structure 20 and the second bulge-structure 30 can make incident light have suitable refraction angle from the first bulge-structure 20 through during the second bulge-structure 30, thus further increases the shielding of optical thin film; And above-mentioned material can make the first bulge-structure 20 and the second bulge-structure 30 have transparent and translucent character, thus optical thin film is made to have good penetration performance.
The material of the 3rd bulge-structure 50 and the 4th bulge-structure 60 can set according to prior art, preferably, the material of the 3rd bulge-structure 50 and four bulge-structures 60 is any one or more in acrylic copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate, polypropylene, polycarbonate, polymethylmethacrylate and polyethylene vinyl acetoacetic ester, more preferably, the specific refractivity of the 3rd bulge-structure 50 and the 4th bulge-structure 60 is greater than 0.02.The above-mentioned ranges of indices of refraction had between 3rd bulge-structure 50 and the 4th bulge-structure 60 can make incident light have suitable refraction angle from the 3rd bulge-structure 50 through during the 4th bulge-structure 60, thus further increases the shielding of optical thin film; And above-mentioned material can make the 3rd bulge-structure 50 and the 4th bulge-structure 60 have transparent and translucent character, thus optical thin film is made to have good penetration performance.
Optical thin film comprises the transparent material layer 10 of multiple stacked setting, and the transparent material layer 10 be disposed adjacent is made up of different materials respectively.The material of transparent material layer 10 can set according to prior art, preferably, the material of each transparent material layer 10 is independently selected from acrylic copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate, polypropylene, polycarbonate, any one or more in polymethylmethacrylate and polyethylene vinyl acetoacetic ester, and the material that surface is provided with the transparent material layer 10 of the first bulge-structure 20 is different from the material of this first bulge-structure 20, the material that surface is provided with the transparent material layer 10 of the second bulge-structure 30 is different from the material of this second bulge-structure 30.Above-mentioned material can make transparent material layer 10 and bulge-structure have transparent and translucent character, thus makes optical thin film have good penetration performance.
According to a further aspect in the invention, provide a kind of back light unit, back light unit comprises light source, light guide plate and blooming piece, and blooming piece comprises above-mentioned optical thin film.Because above-mentioned optical thin film is arranged between the upper prism of back light unit and lower prism, thus enable more light penetrate prism, improve the utilization factor of light in light source, and also prevent foreign matter and enter between upper and lower prism, ensure that the normal conduction of light.
The optical thin film that the application provides is further illustrated below in conjunction with embodiment.
Embodiment 1
As shown in Figure 1, optical thin film comprises the transparent material layer of two stacked settings to the optical thin film that the present embodiment provides, and the material of two-layer transparent material layer is acrylic copolymer;
And be provided with the first bulge-structure between two transparent material layers and be covered in the second bulge-structure on the first bulge-structure, first bulge-structure comprises multiple the first lug boss set gradually along a direction, second bulge-structure comprises multiple the second lug boss set gradually along a direction, first lug boss and the second lug boss all run through transparent material layer along b direction, a direction is vertical with b direction, a direction and b direction are all parallel to the extensional surface of transparent material layer, each second lug boss is covered at least one first lug boss, space between adjacent second lug boss forms air duct, each first lug boss spaced set successively in first bulge-structure, each second lug boss spaced set successively in second bulge-structure,
The material of the first bulge-structure is urethane copolymers, and the material of the second bulge-structure is ethylene copolymer, and the first bulge-structure and the second bulge-structure have different refractive indexes, and the specific refractivity of the first bulge-structure and the second bulge-structure is 0.02;
Distance between each air duct is 1 μm, be the first vertical cross-section perpendicular to the arbitrary section in b direction in each air duct, the shape of the first vertical cross-section is isosceles right triangle, be the second vertical cross-section perpendicular to the arbitrary section in b direction in the first lug boss in each first composite construction layer, and the shape of the second vertical cross-section is semicircle.
Embodiment 2
As shown in Figure 2, optical thin film comprises the transparent material layer of two stacked settings to the optical thin film that the present embodiment provides, and the material of two-layer transparent material layer is ethylene copolymer;
And be provided with the first bulge-structure between two transparent material layers and be covered in the second bulge-structure on the first bulge-structure, first bulge-structure comprises multiple the first lug boss set gradually along a direction, second bulge-structure comprises multiple the second lug boss set gradually along a direction, first lug boss and the second lug boss all run through transparent material layer along b direction, a direction is vertical with b direction, a direction and b direction are all parallel to the extensional surface of transparent material layer, each second lug boss is covered at least one first lug boss, space between adjacent second lug boss forms air duct, each first lug boss spaced set successively in first bulge-structure, each second lug boss spaced set successively in second bulge-structure,
The material of the first bulge-structure is urethane copolymers, the material of the second bulge-structure is acrylic copolymer, first bulge-structure and the second bulge-structure have different refractive indexes, and the specific refractivity of the first bulge-structure and the second bulge-structure is 0.1;
Distance between each air duct is 5 μm, be the first vertical cross-section perpendicular to the arbitrary section in b direction in each air duct, the shape of the first vertical cross-section is semicircle, be the second vertical cross-section perpendicular to the arbitrary section in b direction in the first lug boss in each first composite construction layer, and the shape of the second vertical cross-section is isosceles right triangle.
Embodiment 3
As shown in Figure 3, optical thin film comprises the transparent material layer of two stacked settings to the optical thin film that the present embodiment provides, and the material of two-layer transparent material layer is acrylic copolymer;
And be provided with the first bulge-structure between two transparent material layers and be covered in the second bulge-structure on the first bulge-structure, first bulge-structure comprises multiple the first lug boss set gradually along a direction, second bulge-structure comprises multiple the second lug boss set gradually along a direction, first lug boss and the second lug boss all run through transparent material layer along b direction, a direction is vertical with b direction, a direction and b direction are all parallel to the extensional surface of transparent material layer, each second lug boss is covered at least one first lug boss, space between adjacent second lug boss forms air duct, each first lug boss spaced set successively in first bulge-structure, each second lug boss spaced set successively in second bulge-structure,
The surface of outermost transparent material layer is provided with the second composite construction layer, second composite construction layer comprises the 3rd bulge-structure and is covered in the 4th bulge-structure on the 3rd bulge-structure, 3rd bulge-structure comprises multiple the 3rd lug boss along a direction successively spaced set, 4th bulge-structure comprises multiple the 4th lug boss along a direction successively spaced set, 3rd lug boss and the 4th lug boss all extended on transparent material layer along b direction, each 4th lug boss is covered at least one the 3rd lug boss, each 3rd lug boss spaced set successively in 3rd bulge-structure, each 4th lug boss spaced set successively in 4th bulge-structure,
The material of the first bulge-structure is urethane copolymers, the material of the second bulge-structure is ethylene copolymer, the material of the 3rd bulge-structure is urethane copolymers, the material of the 4th bulge-structure is ethylene copolymer, first bulge-structure and the second bulge-structure have different refractive indexes, and the 3rd bulge-structure and the 4th bulge-structure have different refractive indexes, the specific refractivity of the first bulge-structure and the second bulge-structure is the specific refractivity of the 0.05, three bulge-structure and the 4th bulge-structure is 0.05;
Distance between each air duct is 2 μm, be the first vertical cross-section perpendicular to the arbitrary section in b direction in each air duct, the shape of the first vertical cross-section is isosceles right triangle, arbitrary section perpendicular to b direction in the 3rd lug boss in the first lug boss in each first composite construction layer and each second composite construction layer is the second vertical cross-section, and the shape of the second vertical cross-section is semicircle, the 4th lug boss in each second composite construction layer is the 3rd vertical cross-section perpendicular to the arbitrary section in b direction, and the shape of the 3rd vertical cross-section is isosceles right triangle.
Embodiment 4
As shown in Figure 4, optical thin film comprises the transparent material layer of two stacked settings to the optical thin film that the present embodiment provides, and the material of two-layer transparent material layer is ethylene copolymer;
And be provided with the first bulge-structure between two transparent material layers and be covered in the second bulge-structure on the first bulge-structure, first bulge-structure comprises multiple the first lug boss set gradually along a direction, second bulge-structure comprises multiple the second lug boss set gradually along a direction, first lug boss and the second lug boss all run through transparent material layer along b direction, a direction is vertical with b direction, a direction and b direction are all parallel to the extensional surface of transparent material layer, each second lug boss is covered at least one first lug boss, space between adjacent second lug boss forms air duct, each first lug boss spaced set successively in first bulge-structure, each second lug boss spaced set successively in second bulge-structure,
The surface of outermost transparent material layer is provided with the second composite construction layer, second composite construction layer comprises the 3rd bulge-structure and is covered in the 4th bulge-structure on the 3rd bulge-structure, 3rd bulge-structure comprises multiple the 3rd lug boss along a direction successively spaced set, 4th bulge-structure comprises multiple the 4th lug boss along a direction successively spaced set, 3rd lug boss and the 4th lug boss all extended on transparent material layer along b direction, each 4th lug boss is covered at least one the 3rd lug boss, each 3rd lug boss spaced set successively in 3rd bulge-structure, each 4th lug boss spaced set successively in 4th bulge-structure,
The material of the first bulge-structure is urethane copolymers, the material of the second bulge-structure is acrylic copolymer, the material of the 3rd bulge-structure is urethane copolymers, the material of the 4th bulge-structure is ethylene copolymer, first bulge-structure and the second bulge-structure have different refractive indexes, and the 3rd bulge-structure and the 4th bulge-structure have different refractive indexes, the specific refractivity of the first bulge-structure and the second bulge-structure is the specific refractivity of the 0.2, three bulge-structure and the 4th bulge-structure is 0.2;
Distance between each air duct is 3 μm, be the first vertical cross-section perpendicular to the arbitrary section in b direction in each air duct, the shape of the first vertical cross-section is semicircle, arbitrary section perpendicular to b direction in the 3rd lug boss in the first lug boss in each first composite construction layer and each second composite construction layer is the second vertical cross-section, and the shape of the second vertical cross-section is isosceles right triangle, the 4th lug boss in each second composite construction layer is the 3rd vertical cross-section perpendicular to the arbitrary section in b direction, and the shape of the 3rd vertical cross-section is semicircle.
Comparative example 1
The optical thin film that this comparative example provides comprises transparent material layer, and transparent material layer is made up of layer of material preparation layers, and the material of material preparation layer is acrylic copolymer.
Carry out shielding test to the optical thin film that above-described embodiment 1 to 4 and comparative example 1 provide, method of testing is as follows: to be put into by optical thin film on rule, optical thin film is 10mm with putting the difference in height of advise, optical thin film pressing, and with an inspection surface level of advising.Pass through optical thin film, human eye visual inspection optical thin film can grazing point rule on smallest point, the diameter of smallest point is the result that respective optical film carries out shielding test, and shooting obtains the shielding design sketch of optical thin film in embodiment 1 and comparative example 1, be illustrated in figure 5 the shielding design sketch of embodiment 1, be illustrated in figure 6 the shielding design sketch of comparative example 1;
The optical thin film that above-described embodiment 1 to 4 and comparative example 1 provide is applied to 32 as blooming piece " in down straight aphototropism mode set; and utilize luminance test instrument to test its luminosity; utilize brightness detector to test its briliancy, test result is as follows:
As can be seen from above-mentioned effect, the optical thin film that the embodiment 1 to 4 of the application provides is compared compared with comparative example 1, there is thinner thickness, although the optical thin film that provides of embodiment 1 to 4 compared with comparative example 1 luminosity and briliancy lower slightly, its shielding has and improves significantly; And from Fig. 5 and Fig. 6, the shielding design sketch (Fig. 6) of comparative example 1 is more clear compared with embodiment 1 (Fig. 5), and the optical thin film of visible the embodiment of the present application 1 has higher shielding.
From above description, can find out, the above embodiments of the present invention achieve following technique effect: the invention provides a kind of optical thin film comprising transparent material layer, and be provided with the first composite construction layer between at least two adjacent transparent material layers, first composite construction layer comprises the first bulge-structure and is covered in the second bulge-structure on the first bulge-structure, each second lug boss is covered at least one first lug boss, and the first bulge-structure and the second bulge-structure have different refractive indexes, thus when incident light is by this transparent material layer, owing to having two-layer bulge-structure in transparent material layer, make light by the refraction of more direction and scattering, more refractions that light has and scattering angle not only make optical thin film have good shielding, and reduce a mole interference, the probability that the bad phenomenon such as Newton ring occur.
These are 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 (13)
1. an optical thin film, it is characterized in that, described optical thin film comprises the transparent material layer (10) of multiple stacked setting, and be provided with the first composite construction layer between at least two adjacent described transparent material layers (10), described first composite construction layer comprises the first bulge-structure (20) and is covered in the second bulge-structure (30) on described first bulge-structure (20), described first bulge-structure (20) comprises multiple the first lug boss set gradually along a direction, described second bulge-structure (30) comprises multiple the second lug boss set gradually along described a direction, described first lug boss and described second lug boss all run through described transparent material layer (10) along b direction, described a direction is vertical with described b direction, described a direction and described b direction are all parallel to the extensional surface of described transparent material layer (10), each described second lug boss is covered on the first lug boss described at least one, space between adjacent described second lug boss forms air duct (40), and described first bulge-structure (20) and described second bulge-structure (30) have different refractive indexes.
2. optical thin film according to claim 1, is characterized in that,
Each described first lug boss spaced set successively in described first bulge-structure (20);
Each described second lug boss spaced set successively in described second bulge-structure (30).
3. optical thin film according to claim 1, it is characterized in that, the surface of outermost described transparent material layer (10) is provided with the second composite construction layer, described second composite construction layer comprises the 3rd bulge-structure (50) and is covered in the 4th bulge-structure (60) on described 3rd bulge-structure (50), described 3rd bulge-structure (50) comprises multiple the 3rd lug boss along described a direction successively spaced set, described 4th bulge-structure (60) comprises multiple the 4th lug boss along described a direction successively spaced set, described 3rd lug boss and described 4th lug boss all described extended on described transparent material layer (10) along b direction, each described 4th lug boss is covered on the 3rd lug boss described at least one, and described 3rd bulge-structure (50) and described 4th bulge-structure (60) have different refractive indexes.
4. optical thin film according to claim 3, is characterized in that,
Each described 3rd lug boss spaced set successively in described 3rd bulge-structure (50);
Each described 4th lug boss spaced set successively in described 4th bulge-structure (60).
5. optical thin film according to claim 3, is characterized in that,
The specific refractivity of described first bulge-structure (20) and described second bulge-structure (30) is greater than 0.02;
The specific refractivity of described 3rd bulge-structure (50) and described 4th bulge-structure (60) is greater than 0.02.
6. optical thin film according to claim 1 and 2, is characterized in that, the arbitrary section perpendicular to described b direction in each described air duct (40) is the first vertical cross-section, and the shape of described first vertical cross-section comprises:
Triangle, described leg-of-mutton two base angles are chamfering;
Trapezoidal; And
The annular shape be made up of arc section and the straight-line segment that connects described arc section.
7. optical thin film according to claim 1 and 2, is characterized in that, the distance between each described air duct (40) is less than 5 μm.
8. optical thin film according to claim 3, it is characterized in that, arbitrary section perpendicular to described b direction in described 3rd lug boss in described first lug boss in each described first composite construction layer and each described second composite construction layer is the second vertical cross-section, and the shape of described second vertical cross-section is isosceles triangle, or described second vertical cross-section is the annular shape be made up of arc section and the straight-line segment that connects described arc section.
9. optical thin film according to claim 3, it is characterized in that, described first bulge-structure (20) and described 3rd bulge-structure (50) are made up of any one or more being selected from acrylic copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate, polypropylene, polycarbonate, polymethylmethacrylate and polyethylene vinyl acetoacetic ester.
10. optical thin film according to claim 3, it is characterized in that, described 4th lug boss in each described second composite construction layer is the 3rd vertical cross-section perpendicular to the arbitrary section in described b direction, and the shape of described 3rd vertical cross-section is isosceles triangle, or described 3rd vertical cross-section is the annular shape be made up of arc section and the straight-line segment that connects described arc section.
11. optical thin films according to claim 3, it is characterized in that, described second bulge-structure (30) and described 4th bulge-structure (60) are made up of any one or more being selected from acrylic copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate, polypropylene, polycarbonate, polymethylmethacrylate and polyethylene vinyl acetoacetic ester.
12. optical thin films according to claim 1 and 2, it is characterized in that, each described transparent material layer is made up of any one or more being selected from acrylic copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate, polypropylene, polycarbonate, polymethylmethacrylate and polyethylene vinyl acetoacetic ester.
13. 1 kinds of back light units, described back light unit comprises light source, light guide plate and blooming piece, it is characterized in that, described blooming piece comprises the optical thin film according to any one of claim 1 to 12.
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| CN201510391278.0A CN104950361B (en) | 2015-07-06 | 2015-07-06 | Optical thin film and back light unit |
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