CN104950361B - Optical thin film and back light unit - Google Patents
Optical thin film and back light unit Download PDFInfo
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- CN104950361B CN104950361B CN201510391278.0A CN201510391278A CN104950361B CN 104950361 B CN104950361 B CN 104950361B CN 201510391278 A CN201510391278 A CN 201510391278A CN 104950361 B CN104950361 B CN 104950361B
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Abstract
The present invention provides a kind of optical thin film and back light units.The optical thin film includes multiple transparent material layers being stacked, and at least two are provided with the first composite construction layer between adjacent transparent material layer, first composite construction layer includes the first bulge-structure and the second bulge-structure for being covered on the first bulge-structure, first bulge-structure includes multiple the first lug bosses set gradually along the directions a, second bulge-structure includes multiple the second lug bosses set gradually along the directions a, first lug boss and the second lug boss run through transparent material layer along the directions b, the directions a are vertical with the directions b, the extensional surface of the directions a and the directions b each parallel to transparent material layer, each second lug boss is covered at least one first lug boss, gap between adjacent second lug boss forms air duct, and first bulge-structure and the second bulge-structure there is different refractive index.The optical thin film have good shielding, mole interference, Newton's ring phenomena such as probability of happening it is relatively low.
Description
Technical field
The present invention relates to optical technical fields, in particular to a kind of optical thin film and back light unit.
Background technology
With the development of information age, there is such as active matrix-type liquid crystal display device (LCD), plasma and show face
The flat-panel monitor of plate (PDP), electroluminescent display (EL) and Field Emission Display (FED) etc, these display utensils
There are slim body, the light-weight and excellent performance such as low in energy consumption.Wherein, LCD is due to high contrast and suitable for display mobile image
Characteristic, be widely used in laptop, monitor, TV etc. instead of cathode-ray tube (CRT).
It does not include light source in LCD, it is therefore desirable to additional light source.Such as the back light unit comprising light source is arranged in liquid crystal
The lower section of panel allows LCD to pass through the light display image from the back light unit to provide light to the liquid crystal display panel.The backlight
Prism and lower prism are provided in unit, it is folded usually using two optical thin films in order to improve the brightness of light in back light unit
Add, i.e., upper optical thin film fits together with lower optical thin film, and the protrusion of the protrusion of upper optical thin film and lower optical thin film
Setting in the same direction.But gap is formed between the protrusion and the protrusion of lower optical thin film of upper optical thin film at this time, foreign matter is easily accessible
The gap, to affect the normal conduction of light.Such as Chinese patent CN201320460004.9 in the prior art, by glazing
It learns and fills barrier between film and lower optical thin film, to which the gap between upper optical thin film and lower optical thin film be closed,
Play the role of barrier external foreign matter and enter complex optical film, and then ensure that the normal conduction of light and LCD are good
Display effect.
However, due to being provided with barrier in optical thin-film structure in the prior art, it can be to light in entire optical thin film
Conduction impacts, and to reduce the conduction efficiency of light in back light unit, and the limitation of barrier material also results in light
The shielding for learning membrane structure is poor.
Invention content
The main purpose of the present invention is to provide a kind of optical thin film and back light units, to improve light in optical thin film
Conduction efficiency, and make optical thin film that there is good shielding.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of optical thin film, the optical thin film packet
Multiple transparent material layers being stacked are included, and the first composite construction layer is provided between at least two adjacent transparent material layers,
First composite construction layer includes the first bulge-structure and the second bulge-structure for being covered on the first bulge-structure, the first protrusion knot
Structure includes multiple the first lug bosses set gradually along the directions a, and the second bulge-structure includes multiple set gradually along the directions a
Two lug bosses, the first lug boss and the second lug boss run through transparent material layer along the directions b, and the directions a are vertical with the directions b, the directions a
With the directions b each parallel to the extensional surface of transparent material layer, each second lug boss is covered at least one first lug boss,
Gap between adjacent second lug boss forms air duct, and the first bulge-structure and the second bulge-structure have different foldings
Penetrate rate.
Further, each first lug boss spaced set successively in the first bulge-structure；Each in second bulge-structure
Two lug bosses spaced set successively.
Further, the second composite construction layer, the second composite construction are provided on the surface of outermost transparent material layer
Layer includes third protrusion structure and the 4th bulge-structure being covered in third protrusion structure, and third protrusion structure includes multiple edges
The third protrusion portion of the directions a spaced set successively, the 4th bulge-structure includes multiple along the of the directions a successively spaced set
Four lug bosses, third protrusion portion and the 4th lug boss are extended along the directions b on transparent material layer, each 4th lug boss
It is covered at least one third protrusion portion, and third protrusion structure and the 4th bulge-structure have different refractive index.
Further, each third protrusion portion spaced set successively in third protrusion structure；Each in 4th bulge-structure
Four lug bosses spaced set successively.
Further, the specific refractivity of the first bulge-structure and the second bulge-structure is more than 0.02；Third protrusion structure
It is more than 0.02 with the specific refractivity of the 4th bulge-structure.
Further, it is the first vertical cross-section, the first vertical cross-section perpendicular to the arbitrary section in the directions b in each air duct
Shape include：Two base angles of triangle, triangle are chamfering；It is trapezoidal；And by arc section and connect the straight of arc section
The annular shape of line segment composition.
Further, the distance between each air duct is less than 5 μm.
Further, the third protrusion in the first lug boss and each second composite construction layer in each first composite construction layer
Perpendicular to the arbitrary section in the directions b it is the second vertical cross-section in portion, and the shape of the second vertical cross-section is isosceles triangle or the
Two vertical cross-sections are the annular shape being made of the straightway of arc section and connection arc section.
Further, the first bulge-structure and third protrusion structure are by being selected from acrylic copolymer, ethylene copolymer, amino
Ethyl formate copolymer, polyethylene terephthalate, polypropylene, makrolon, polymethyl methacrylate and polyethylene-
Vinyl acetate any one or more of is made.
Further, arbitrary section of the 4th lug boss in each second composite construction layer perpendicular to the directions b hangs down for third
Straightforward face, and the shape of third vertical cross-section is isosceles triangle or third vertical cross-section is by arc section and connection circular arc
The shape of the straightway composition of section.
Further, the 4th bulge-structure of the second bulge-structure is by being selected from acrylic copolymer, ethylene copolymer, amino first
Acetoacetic ester copolymer, polyethylene terephthalate, polypropylene, makrolon, polymethyl methacrylate and polyethylene-second
Olefin(e) acid ethyl ester any one or more of is made.
Further, each transparent material layer is copolymerized by being selected from acrylic copolymer, ethylene copolymer, urethanes
In object, polyethylene terephthalate, polypropylene, makrolon, polymethyl methacrylate and polyethylene vinyl acetoacetic ester
Any one or more be made.
According to another aspect of the present invention, a kind of back light unit is provided, which includes light source, light guide plate and light
Learn diaphragm, which is characterized in that optical diaphragm includes above-mentioned optical thin film.
It applies the technical scheme of the present invention, the present invention provides a kind of optical thin films including transparent material layer, and at least
The first composite construction layer is provided between two adjacent transparent material layers, the first composite construction layer includes the first bulge-structure
With the second bulge-structure being covered on the first bulge-structure, each second lug boss is covered at least one described first
On lug boss, and the first bulge-structure and the second bulge-structure have different refractive index, transparent by this to work as incident light
When material layer, due to, with two layers of bulge-structure, making refraction and scattering of the light by more direction in transparent material layer, what light had
More reflect not only makes optical thin film have good shielding, but also reduces mole interference, Newton's ring etc. with scattering angle
The probability that bad phenomenon occurs.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows that the shape of the second vertical cross-section in the first lug boss that embodiment of the present invention is provided is by circular arc
The shape of the straightway composition of section and connection arc section, and the shape of the first vertical cross-section is triangle in each air duct
The vertical section structural schematic diagram of optical thin film；
The shape of the second vertical cross-section is triangle in the first lug boss provided Fig. 2 shows embodiment of the present invention
Shape, and the shape of the first vertical cross-section is the shape being made of the straightway of arc section and connection arc section in each air duct
Optical thin film vertical section structural schematic diagram；
Fig. 3 shows that the shape of the second vertical cross-section in the third protrusion portion that embodiment of the present invention is provided is by circular arc
The shape of the straightway composition of section and connection arc section, and the shape of third vertical cross-section is triangle in the 4th lug boss
The vertical section structural schematic diagram of optical thin film；
Fig. 4 shows that the shape of the second vertical cross-section in the third protrusion portion that embodiment of the present invention is provided is triangle
Shape, and the shape of third vertical cross-section is the shape being made of the straightway of arc section and connection arc section in the 4th lug boss
Optical thin film vertical section structural schematic diagram；
Fig. 5 shows the shielding design sketch for the optical thin film that the embodiment of the present invention 1 is provided；
Fig. 6 shows the shielding design sketch for the optical thin film that comparative example 1 of the present invention is provided.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
For ease of description, herein can with use space relative terms, as " ... on ", " in ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, if the device in attached drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (be rotated by 90 ° or be in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
It, can be to entire optical thin film by background technology it is found that being provided with barrier in optical thin-film structure in the prior art
The conduction of middle light impacts, and to reduce the conduction efficiency of light in back light unit, and the limitation of barrier material also can
Cause the shielding of optical thin-film structure poor.The present inventor studies regarding to the issue above, provides a kind of light
Learn film.As shown in Figures 1 to 4, which includes multiple transparent material layers 10 being stacked, and at least two is adjacent
It is provided with the first composite construction layer between bright material layer 10, the first composite construction layer includes the first bulge-structure 20 and is covered in the
The second bulge-structure 30 on one bulge-structure 20, the first bulge-structure 20 include it is multiple set gradually along the directions a it is first convex
The portion of rising, the second bulge-structure 30 include multiple the second lug bosses set gradually along the directions a, the first lug boss and the second lug boss
Run through transparent material layer 10 along the directions b, the directions a are vertical with the directions b, and the directions a and the directions b are each parallel to transparent material layer 10
Extensional surface, each second lug boss are covered at least one first lug boss, the gap shape between adjacent second lug boss
At air duct 40, and the first bulge-structure 20 and the second bulge-structure 30 have different refractive index.
In the above-mentioned optical thin film of the present invention, when incident light is by the transparent material layer, due in transparent material layer
With two layers of bulge-structure, make refraction and scattering of the light by more direction, the more refractions and scattering angle that light has not only make
Optical thin film has good shielding, and reduces the probability of the bad phenomenons such as mole interference, Newton's ring generation.
In optical thin film provided by the invention, it is preferable that between each first lug boss waits successively in the first bulge-structure 20
Away from setting, and each second lug boss spaced set successively in the second bulge-structure 30.First protrusion of above-mentioned spaced set
Portion and the second lug boss can optimize the refractive direction for being incident on light in transparent material layer 10, further improve optics
The shielding of film.
In optical thin film provided by the invention, second is also provided on the surface of outermost transparent material layer 10
Composite construction layer, the second composite construction layer include third protrusion structure 50 and the 4th protrusion being covered in third protrusion structure 50
Structure 60, third protrusion structure 50 include multiple third protrusion portions along the directions a successively spaced set, the 4th bulge-structure 60
Including multiple the 4th lug bosses along the directions a successively spaced set, third protrusion portion and the 4th lug boss extend along the directions b
It is set on transparent material layer 10, each 4th lug boss is covered at least one third protrusion portion, and third protrusion structure
50 and the 4th bulge-structure 60 have different refractive index.The second composite construction layer for being covered in 10 surface of transparent material layer can
The refractive direction of light to being emitted from transparent material layer 10 optimizes, and has also advanced optimized the shielding of optical thin film.
In above-mentioned preferred embodiment, it is further preferable that each third protrusion portion is successively etc. in third protrusion structure 50
Spacing is arranged, and each 4th lug boss spaced set successively in the 4th bulge-structure 60.The third of above-mentioned spaced set is convex
The portion of rising and the 4th lug boss can further optimize the refractive direction for the light being emitted from transparent material layer 10, more effectively
Ground improves the shielding of optical thin film.
Perpendicular to the arbitrary section in the directions b it is the first vertical cross-section in each air duct 40, the in each air duct 40
One vertical cross-section can be set according to teachings of the present application, it is preferable that the shape of the first vertical cross-section includes：Triangle,
Two base angles of triangle are chamfering, and above-mentioned triangle includes various types of triangles, such as acute triangle, right angle trigonometry
Shape, obtuse triangle, isosceles triangle and equilateral triangle；It is trapezoidal, it is above-mentioned trapezoidal including various types of trapezoidal, it is terraced as
Shape, right-angled trapezium and isosceles trapezoid；And by arc section and connect the annular shape that forms of straightway of arc section, it is above-mentioned by
Arc section and the shape for connecting the straightway composition of arc section include various types, and the centering angle of arc section can in above-mentioned shape
Think any angle less than 180 °.Due to the first vertical cross-section above-mentioned shape having the same in each air layer, so as to
It is enough that the refractive direction for being incident on light in air layer is optimized, further improve the shielding of optical thin film.
In above-mentioned preferred embodiment, when the shape of the first vertical cross-section is triangle, the first vertical cross-section
Shape can be isosceles right triangle, and the straightway between the base angle of isosceles right triangle is first straight line section；When first
When the shape of vertical cross-section is trapezoidal, the shape of the first vertical cross-section can be isosceles trapezoid, and the bottom of isosceles trapezoid is first
Straightway；When the first vertical cross-section is the shape being made of the straightway of arc section and connection arc section, first vertical section
The shape in face can be semicircle, and semicircular straightway is first straight line section；Page can have various shapes in optical thin film
The first vertical cross-section.First vertical cross-section has above-mentioned preferred shape, can advanced optimize and be incident on light in air layer
Refractive direction.
Preferably, the distance between each air duct 40 is less than 5 μm.Above-mentioned distance range can make in transparent material layer 10
With the suitable air duct 40 of quantity, so as to be optimized to the refractive direction for being incident on light in transparent material layer 10,
Further improve the shielding of optical thin film.
It is vertical in the third protrusion portion in the first lug boss and each second composite construction layer in each first composite construction layer
Arbitrary section in the directions b is the second vertical cross-section, and the second vertical cross-section can be set according to teachings of the present application, preferably
Ground, the second vertical cross-section are the annular shape being made of the straightway of arc section and connection arc section, structure such as Fig. 1 and figure
Shown in 3 or the shape of the second vertical cross-section is isosceles triangle, and structure is as shown in Figure 2 and Figure 4.Due to each first composite junction
The above-mentioned shape having the same of the second vertical cross-section in the first lug boss in structure layer, the third in each second composite construction layer
The same above-mentioned shape having the same of the second vertical cross-section in lug boss, so as to being incident on light in transparent material layer 10
Refractive direction optimize, further improve the shielding of optical thin film.
Arbitrary section of the 4th lug boss perpendicular to the directions b in each second composite construction layer is third vertical cross-section, the
Three vertical cross-sections can be set according to teachings of the present application, it is preferable that and the shape of third vertical cross-section is isosceles triangle,
Its structure is as shown in figure 3, or third vertical cross-section is the shape being made of the straightway of arc section and connection arc section, knot
Structure is as shown in Figure 4.Since the third vertical cross-section in the 4th lug boss in each second composite construction layer is forever positive having the same
Above-mentioned shape further improves optics so as to be optimized to the refractive direction for being incident on light in transparent material layer 10
The shielding of film.
The material of first bulge-structure 20 and the second bulge-structure 30 can be set according to the prior art, it is preferable that
The material of first bulge-structure 20 and the second bulge-structure 30 is acrylic copolymer, ethylene copolymer, urethanes
Copolymer, polyethylene terephthalate, polypropylene, makrolon, polymethyl methacrylate and polyethylene vinyl acid second
Ester any one or more of, it is further preferable that the specific refractivity of the first bulge-structure 20 and the second bulge-structure 30 is more than
0.02.The above-mentioned ranges of indices of refraction having between first bulge-structure 20 and the second bulge-structure 30 can make incident light from first
Bulge-structure 20 has suitable refraction angle when passing through the second bulge-structure 30, to further improve the screening of optical thin film
Covering property；And above-mentioned material can make the first bulge-structure 20 and the second bulge-structure 30 have transparent and translucent property, from
And make optical thin film that there is preferable penetration performance.
The material of third protrusion structure 50 and the 4th bulge-structure 60 can be set according to the prior art, it is preferable that
The material of third protrusion structure 50 and four bulge-structures 60 is that acrylic copolymer, ethylene copolymer, urethanes are total
Polymers, polyethylene terephthalate, polypropylene, makrolon, polymethyl methacrylate and polyethylene vinyl acetoacetic ester
Any one or more of, it is further preferable that the specific refractivity of third protrusion structure 50 and the 4th bulge-structure 60 is more than
0.02.The above-mentioned ranges of indices of refraction having between third protrusion structure 50 and the 4th bulge-structure 60 can make incident light from third
Bulge-structure 50 has suitable refraction angle when passing through four bulge-structures 60, to further improve the screening of optical thin film
Covering property；And above-mentioned material can make third protrusion structure 50 and the 4th bulge-structure 60 have transparent and translucent property, from
And make optical thin film that there is preferable penetration performance.
Optical thin film includes multiple transparent material layers 10 being stacked, and the transparent material layer 10 being disposed adjacent is not respectively by
Same material composition.The material of transparent material layer 10 can be set according to the prior art, it is preferable that each transparent material layer 10
Material it is independent selected from acrylic copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate
Ester, polypropylene, makrolon, polymethyl methacrylate and polyethylene vinyl acetoacetic ester any one or more of, and surface
The material for being provided with the transparent material layer 10 of the first bulge-structure 20 is different from the material of first bulge-structure 20, surface setting
There is the material of the transparent material layer 10 of the second bulge-structure 30 to be different from the material of second bulge-structure 30.Above-mentioned material can
Make transparent material layer 10 and bulge-structure that there is transparent and translucent property, to make optical thin film that there is preferable penetrability
Energy.
According to another aspect of the present invention, a kind of back light unit is provided, back light unit includes light source, light guide plate and optics
Diaphragm, optical diaphragm include above-mentioned optical thin film.Since above-mentioned optical thin film is set to the upper prism of back light unit and lower rib
Between mirror, to enable more light to penetrate prism, the utilization rate of light in light source is improved, and also prevents foreign matter entrance
Between upper and lower prism, the normal conduction of light ensure that.
Optical thin film provided by the present application is further illustrated below in conjunction with embodiment.
Embodiment 1
Optical thin film provided in this embodiment is as shown in Figure 1, optical thin film includes two transparent material layers being stacked, and two
The material of layer transparent material layer is acrylic copolymer；
And second for being provided with the first bulge-structure between two transparent material layers and being covered on the first bulge-structure is convex
Structure is played, the first bulge-structure includes multiple the first lug bosses set gradually along the directions a, and the second bulge-structure includes multiple edges
The second lug boss that the directions a are set gradually, the first lug boss and the second lug boss run through transparent material layer, the directions a along the directions b
Vertical with the directions b, each parallel to the extensional surface of transparent material layer, each second lug boss is covered at least for the directions a and the directions b
On one the first lug boss, the gap between adjacent second lug boss forms air duct, and each first is convex in the first bulge-structure
The portion of rising spaced set successively, each second lug boss spaced set successively in the second bulge-structure；
The material of first bulge-structure is urethane copolymers, and the material of the second bulge-structure is ethylene copolymer
Object, the first bulge-structure and the second bulge-structure have different refractive index, the folding of the first bulge-structure and the second bulge-structure
The difference for penetrating rate is 0.02；
The distance between each air duct is 1 μm, vertical for first perpendicular to the arbitrary section in the directions b in each air duct
Section, the shape of the first vertical cross-section are isosceles right triangle, vertical in the first lug boss in each first composite construction layer
Arbitrary section in the directions b is the second vertical cross-section, and the shape of the second vertical cross-section is semicircle.
Embodiment 2
Optical thin film provided in this embodiment is as shown in Fig. 2, optical thin film includes two transparent material layers being stacked, and two
The material of layer transparent material layer is ethylene copolymer；
And second for being provided with the first bulge-structure between two transparent material layers and being covered on the first bulge-structure is convex
Structure is played, the first bulge-structure includes multiple the first lug bosses set gradually along the directions a, and the second bulge-structure includes multiple edges
The second lug boss that the directions a are set gradually, the first lug boss and the second lug boss run through transparent material layer, the directions a along the directions b
Vertical with the directions b, each parallel to the extensional surface of transparent material layer, each second lug boss is covered at least for the directions a and the directions b
On one the first lug boss, the gap between adjacent second lug boss forms air duct, and each first is convex in the first bulge-structure
The portion of rising spaced set successively, each second lug boss spaced set successively in the second bulge-structure；
The material of first bulge-structure is urethane copolymers, and the material of the second bulge-structure is acrylic acid copolymer
Object, the first bulge-structure and the second bulge-structure have different refractive index, the folding of the first bulge-structure and the second bulge-structure
The difference for penetrating rate is 0.1；
The distance between each air duct is 5 μm, vertical for first perpendicular to the arbitrary section in the directions b in each air duct
The shape in section, the first vertical cross-section is semicircle, perpendicular to the directions b in the first lug boss in each first composite construction layer
Arbitrary section is the second vertical cross-section, and the shape of the second vertical cross-section is isosceles right triangle.
Embodiment 3
Optical thin film provided in this embodiment is as shown in figure 3, optical thin film includes two transparent material layers being stacked, and two
The material of layer transparent material layer is acrylic copolymer；
And second for being provided with the first bulge-structure between two transparent material layers and being covered on the first bulge-structure is convex
Structure is played, the first bulge-structure includes multiple the first lug bosses set gradually along the directions a, and the second bulge-structure includes multiple edges
The second lug boss that the directions a are set gradually, the first lug boss and the second lug boss run through transparent material layer, the directions a along the directions b
Vertical with the directions b, each parallel to the extensional surface of transparent material layer, each second lug boss is covered at least for the directions a and the directions b
On one the first lug boss, the gap between adjacent second lug boss forms air duct, and each first is convex in the first bulge-structure
The portion of rising spaced set successively, each second lug boss spaced set successively in the second bulge-structure；
The second composite construction layer is provided on the surface of outermost transparent material layer, the second composite construction layer includes third
Bulge-structure and the 4th bulge-structure being covered in third protrusion structure, third protrusion structure include it is multiple along the directions a successively
The third protrusion portion of spaced set, the 4th bulge-structure include multiple the 4th lug bosses along the directions a successively spaced set,
Third protrusion portion and the 4th lug boss are extended along the directions b on transparent material layer, each 4th lug boss be covered in
In a few third protrusion portion, each third protrusion portion spaced set successively in third protrusion structure is each in the 4th bulge-structure
4th lug boss spaced set successively；
The material of first bulge-structure is urethane copolymers, and the material of the second bulge-structure is ethylene copolymer
Object, the material of third protrusion structure are urethane copolymers, and the material of the 4th bulge-structure is ethylene copolymer, first
Bulge-structure and the second bulge-structure have different refractive index, and third protrusion structure and the 4th bulge-structure are with different
The specific refractivity of refractive index, the first bulge-structure and the second bulge-structure is 0.05, third protrusion structure and the 4th protrusion knot
The specific refractivity of structure is 0.05；
The distance between each air duct is 2 μm, vertical for first perpendicular to the arbitrary section in the directions b in each air duct
The shape in section, the first vertical cross-section is isosceles right triangle, the first lug boss and Ge in each first composite construction layer
Perpendicular to the arbitrary section in the directions b it is the second vertical cross-section in third protrusion portion in two composite construction layers, and second vertical cuts
The shape in face is semicircle, and arbitrary section of the 4th lug boss in each second composite construction layer perpendicular to the directions b hangs down for third
Straightforward face, and the shape of third vertical cross-section is isosceles right triangle.
Embodiment 4
Optical thin film provided in this embodiment is as shown in figure 4, optical thin film includes two transparent material layers being stacked, and two
The material of layer transparent material layer is ethylene copolymer；
And second for being provided with the first bulge-structure between two transparent material layers and being covered on the first bulge-structure is convex
Structure is played, the first bulge-structure includes multiple the first lug bosses set gradually along the directions a, and the second bulge-structure includes multiple edges
The second lug boss that the directions a are set gradually, the first lug boss and the second lug boss run through transparent material layer, the directions a along the directions b
Vertical with the directions b, each parallel to the extensional surface of transparent material layer, each second lug boss is covered at least for the directions a and the directions b
On one the first lug boss, the gap between adjacent second lug boss forms air duct, and each first is convex in the first bulge-structure
The portion of rising spaced set successively, each second lug boss spaced set successively in the second bulge-structure；
The second composite construction layer is provided on the surface of outermost transparent material layer, the second composite construction layer includes third
Bulge-structure and the 4th bulge-structure being covered in third protrusion structure, third protrusion structure include it is multiple along the directions a successively
The third protrusion portion of spaced set, the 4th bulge-structure include multiple the 4th lug bosses along the directions a successively spaced set,
Third protrusion portion and the 4th lug boss are extended along the directions b on transparent material layer, each 4th lug boss be covered in
In a few third protrusion portion, each third protrusion portion spaced set successively in third protrusion structure is each in the 4th bulge-structure
4th lug boss spaced set successively；
The material of first bulge-structure is urethane copolymers, and the material of the second bulge-structure is acrylic acid copolymer
Object, the material of third protrusion structure are urethane copolymers, and the material of the 4th bulge-structure is ethylene copolymer, first
Bulge-structure and the second bulge-structure have different refractive index, and third protrusion structure and the 4th bulge-structure are with different
The specific refractivity of refractive index, the first bulge-structure and the second bulge-structure is 0.2, third protrusion structure and the 4th bulge-structure
Specific refractivity be 0.2；
The distance between each air duct is 3 μm, vertical for first perpendicular to the arbitrary section in the directions b in each air duct
The shape in section, the first vertical cross-section is semicircle, the first lug boss in each first composite construction layer and each second composite junction
Perpendicular to the arbitrary section in the directions b it is the second vertical cross-section, and the shape of the second vertical cross-section in third protrusion portion in structure layer
For isosceles right triangle, arbitrary section of the 4th lug boss perpendicular to the directions b in each second composite construction layer hangs down for third
Straightforward face, and the shape of third vertical cross-section is semicircle.
Comparative example 1
The optical thin film that this comparative example provides includes transparent material layer, and transparent material layer is made of layer of material preparation layers,
The material of material preparation layer is acrylic copolymer.
The optical thin film provided above-described embodiment 1 to 4 and comparative example 1 carries out shielding test, and test method is as follows：It will
Optical thin film is put on rule, and the difference in height of optical thin film and point rule is 10mm, and optical thin film flattens, and with an inspection surface for rule
It is horizontal.By optical thin film, the smallest point that human eye visual inspection optical thin film can be advised with grazing point, the diameter of smallest point
As respective optical film carry out shielding test as a result, and shoot obtain the screening of optical thin film in embodiment 1 and comparative example 1
Covering property design sketch is illustrated in figure 5 the shielding design sketch of embodiment 1, is 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 are provided is applied to 32 " downward backs as optical diaphragm
In optical mode group, and its light emission luminance is tested using luminance test instrument, its briliancy is tested using brightness detector,
Test result is as follows：
From said effect as can be seen that the optical thin film that is provided of embodiments herein 1 to 4 phase compared with comparative example 1
Than there is thinner thickness, although the optical thin film that is provided of embodiment 1 to 4 light emission luminance and briliancy compared with comparative example 1
It is slightly lower, but its shielding have be significantly increased；And from Fig. 5 and Fig. 6 as it can be seen that the shielding design sketch (Fig. 6) of comparative example 1
It is relatively sharp compared with embodiment 1 (Fig. 5), it is seen that the optical thin film of the embodiment of the present application 1 has higher shielding.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：The present invention carries
A kind of optical thin film including transparent material layer has been supplied, and the first composite junction is provided between at least two adjacent transparent material layers
Structure layer, the first composite construction layer include the first bulge-structure and the second bulge-structure for being covered 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 foldings
Rate is penetrated, to when incident light is by the transparent material layer, due to having two layers of bulge-structure in transparent material layer, make light by more
Multidirectional refraction and scattering, the more refractions and scattering angle that light has not only make optical thin film have good shielding,
And reduce the probability of the bad phenomenons such as mole interference, Newton's ring generation.
It these are only the preferred embodiment of the present invention, be not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification made by all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of optical thin film, which is characterized in that the optical thin film includes multiple transparent material layers (10) being stacked, and
It is provided with the first composite construction layer between at least two adjacent transparent material layers (10), first composite construction layer includes
First bulge-structure (20) and the second bulge-structure (30) being covered on first bulge-structure (20), first protrusion
Structure (20) includes multiple the first lug bosses set gradually along the directions a, and second bulge-structure (30) includes multiple along institute
The second lug boss that the directions a are set gradually is stated, first lug boss and second lug boss are along the directions b through described
Bright material layer (10), the directions a are vertical with the directions b, and the directions a and the directions b are each parallel to the transparent material
The extensional surface of the bed of material (10), each second lug boss are covered at least one first lug boss, adjacent described
Gap between second lug boss forms air duct (40), and first bulge-structure (20) and second bulge-structure
(30) there is different refractive index,
The second composite construction layer, second composite construction layer are provided on the surface of the outermost transparent material layer (10)
Including third protrusion structure (50) and the 4th bulge-structure (60) being covered on the third protrusion structure (50), the third
Bulge-structure (50) includes multiple third protrusion portions along the directions a successively spaced set, the 4th bulge-structure
(60) include multiple the 4th lug bosses along the directions a successively spaced set, the third protrusion portion and described 4th convex
The portion of rising is described to be extended along the directions b on the transparent material layer (10), and each 4th lug boss is covered at least
In one third protrusion portion, and the third protrusion structure (50) and the 4th bulge-structure (60) have different foldings
Rate is penetrated,
First bulge-structure (20), second bulge-structure (30), the third protrusion structure (50) and the described 4th
Bulge-structure (60) only has a kind of refractive index；
The specific refractivity of first bulge-structure (20) and second bulge-structure (30) is more than 0.02；
The specific refractivity of the third protrusion structure (50) and the 4th bulge-structure (60) is more than 0.02,
The distance between each described air duct (40) is less than 5 μm.
2. optical thin film according to claim 1, which is characterized in that
Each first lug boss spaced set successively in first bulge-structure (20)；
Each second lug boss spaced set successively in second bulge-structure (30).
3. optical thin film according to claim 1, which is characterized in that
Each third protrusion portion spaced set successively in the third protrusion structure (50)；
Each 4th lug boss spaced set successively in 4th bulge-structure (60).
4. optical thin film according to claim 1 or 2, which is characterized in that perpendicular to institute in each air duct (40)
The arbitrary section for stating the directions b is the first vertical cross-section, and the shape of first vertical cross-section includes：
Two base angles of triangle, the triangle are chamfering；
It is trapezoidal；And
The annular shape being made of the straightway of arc section and the connection arc section.
5. optical thin film according to claim 1, which is characterized in that described first in each first composite construction layer
Perpendicular to the arbitrary section in the directions b it is the in the third protrusion portion in lug boss and each second composite construction layer
Two vertical cross-sections, and the shape of second vertical cross-section is isosceles triangle or second vertical cross-section is by arc section
And the annular shape of the straightway composition of the connection arc section.
6. optical thin film according to claim 1, which is characterized in that first bulge-structure (20) and the third are convex
Structure (50) is played by being selected from acrylic copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate
Ester, polypropylene, makrolon, polymethyl methacrylate and polyethylene vinyl acetoacetic ester any one or more of are made.
7. optical thin film according to claim 1, which is characterized in that the in each second composite construction layer the described 4th
Arbitrary section of the lug boss perpendicular to the directions b is third vertical cross-section, and the shape of the third vertical cross-section is isosceles
Triangle or the third vertical cross-section are the annular shape being made of the straightway of arc section and the connection arc section.
8. optical thin film according to claim 1, which is characterized in that second bulge-structure (30) and described 4th convex
Structure (60) is played by being selected from acrylic copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate
Ester, polypropylene, makrolon, polymethyl methacrylate and polyethylene vinyl acetoacetic ester any one or more of are made.
9. optical thin film according to claim 1 or 2, which is characterized in that each transparent material layer is by being selected from acrylic acid
Copolymer, urethane copolymers, polyethylene terephthalate, polypropylene, makrolon, gathers ethylene copolymer
Methyl methacrylate and polyethylene vinyl acetoacetic ester any one or more of are made.
10. a kind of back light unit, the back light unit includes light source, light guide plate and optical diaphragm, which is characterized in that the optics
Diaphragm includes the optical thin film described in any one of claim 1 to 9.
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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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| CN201510391278.0A CN104950361B (en) | 2015-07-06 | 2015-07-06 | Optical thin film and back light unit |
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| CN104950361B true CN104950361B (en) | 2018-08-28 |
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| CN105319626B (en) * | 2015-11-09 | 2018-03-02 | 张家港康得新光电材料有限公司 | Optical thin film and display device |
| TWI695190B (en) * | 2018-08-15 | 2020-06-01 | 住華科技股份有限公司 | Optical film, display device, and manufacturing method for the same |
| CN114924338B (en) * | 2022-06-13 | 2023-12-05 | 深圳市兆驰光元科技有限公司 | Diffusion barrier and backlight module |
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| JP2008108705A (en) * | 2006-09-26 | 2008-05-08 | Canon Inc | Organic light-emitting device |
| KR100854752B1 (en) * | 2007-02-01 | 2008-08-27 | 온누리전자(주) | United diffuser prism sheet and method of manufacture thereof |
| WO2010058999A2 (en) * | 2008-11-21 | 2010-05-27 | 미래나노텍(주) | Optical sheet and backlight unit furnished with same |
| KR101070686B1 (en) * | 2009-10-12 | 2011-10-07 | 황장환 | Composite Sheet for LCD, and Backlight Unit Using The Same |
| CN202119969U (en) * | 2011-06-28 | 2012-01-18 | 北京康得新复合材料股份有限公司 | Condensing piece with composite structure of lens and prisma |
| CN102207565B (en) * | 2011-07-01 | 2014-07-09 | 凯鑫森(上海)功能性薄膜产业有限公司 | Multifunctional optical sheet, and backlight module and liquid crystal display device with optical sheet |
| CN103245988A (en) * | 2012-02-03 | 2013-08-14 | 苏州拓显光电材料有限公司 | Diffuser plate |
| KR101474362B1 (en) * | 2013-01-07 | 2014-12-18 | 글로텍 주식회사 | Optical film and method thereof |
| JP2014162127A (en) * | 2013-02-26 | 2014-09-08 | Toppan Printing Co Ltd | Die roll for extrusion molding and method for manufacturing optical pattern sheet using the same |
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