CN104950511B - Optical thin film and back light unit - Google Patents
Optical thin film and back light unit Download PDFInfo
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- CN104950511B CN104950511B CN201510391612.2A CN201510391612A CN104950511B CN 104950511 B CN104950511 B CN 104950511B CN 201510391612 A CN201510391612 A CN 201510391612A CN 104950511 B CN104950511 B CN 104950511B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
Abstract
The present invention provides a kind of optical thin film and back light unit.The optical thin film includes transparent material layer, one or more air layers being parallel to each other are additionally provided with the transparent material layer, each air layer is made of multiple air ducts set gradually along a directions, air duct runs through transparent material layer along b directions, a directions are vertical with b directions, the extensional surface of a directions and b directions each parallel to transparent material layer, each air duct has along the curved two corresponding side walls in b directions, and the arbitrary section in each air duct parallel to transparent material layer surface is of similar shape.So as to when incident light is by the air duct, since air duct has curved side wall, make refraction and scattering of the light by more direction, light with more refractions and scattering angle not only make optical thin film with good shielding, and the probability of the bad phenomenons such as mole interference, Newton's ring generation is reduced, and then improve conduction efficiency of the light in optical thin film.
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
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 the excellent performances such as slim body, light-weight and power consumption be low.Wherein, LCD is due to high contrast and suitable for showing mobile image
Characteristic, be widely used in laptop, monitor, TV etc. instead of cathode-ray tube (CRT).
Do not include light source in LCD, it is therefore desirable to extra light source.Such as the back light unit comprising light source is arranged on 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 panel.The backlight
Prism and lower prism are provided with unit, in order to improve the brightness of light in back light unit, is folded usually using two optical thin films
Add, i.e., upper optical thin film fits together with lower optical thin film, and the projection of upper optical thin film and the projection of lower optical thin film
Set in the same direction.But gap is formed between the projection of upper optical thin film and the projection of lower optical thin film at this time, foreign matter is easily accessible
The gap, so as to have impact on the normal conduction of light.Such as Chinese patent CN201320460004.9 in the prior art, by glazing
Learn and fill barrier between film and lower optical thin film, so that the gap between upper optical thin film and lower optical thin film is closed,
Play the role of obstruct external foreign matter enter complex optical film, and then ensure that light normal conduction and LCD well
Display effect.
, can be to the biography of light in whole optical thin film yet with barrier is provided with optical thin-film structure in the prior art
Lead and impact, so that the conduction efficiency of light in back light unit is reduced, and the limitation of barrier material also results in optics
The shielding of membrane structure is poor.
The content of the invention
It is a primary object of the present invention to provide a kind of optical thin film and back light unit, to improve light in optical thin film
Conduction efficiency, and make optical thin film that there is good shielding.
To achieve these goals, according to an aspect of the invention, there is provided a kind of optical thin film, the optical thin film bag
Include transparent material layer, it is characterised in that one or more air layers being parallel to each other, each air are additionally provided with transparent material layer
Layer is made of multiple air ducts set gradually along a directions, and air duct runs through transparent material layer, a directions and b along b directions
Direction is vertical, and each parallel to the extensional surface of transparent material layer, each air duct has curved along b directions for a directions and b directions
Two corresponding side walls, the arbitrary section in each air duct parallel to transparent material layer surface are of similar shape.
Further, each air duct spaced set successively in air layer.
Further, two corresponding side walls are symmetrical；Or perpendicular to the arbitrary section in b directions in each air duct
For the first vertical cross-section, the first vertical cross-section in each air layer is identically shaped and sized.
Further, corresponding side wall has at least one set of sequentially connected lug boss and concave part.
Further, each lug boss and each concave part have identical radian.
Further, adjacent lug boss and concave part composition side wall element, and the vertex in side wall element protrusions portion and
Distance of the vertex of concave part on a directions is 0.5~5 μm.
Further, adjacent lug boss and concave part composition side wall element, and the vertex in side wall element protrusions portion and
Horizontal distance of the vertex of concave part on b directions is 250~2000 μm.
Further, the shape of the first vertical cross-section includes：Triangle, two base angles of triangle are chamfering；It is trapezoidal；With
And the annular shape being made of the straightway of arc section and connection arc section.
Further, the distance between each air duct is less than 5 μm in each air layer.
Further, optical thin film further includes the bulge-structure being arranged at least one surface of transparent material layer, raised
Structure includes multiple protrusion elements along a directions successively spaced set, and protrusion element runs through transparent material layer along b directions.
Further, protrusion element has the second vertical cross-section, and the second vertical cross-section is vertical with b directions, and second is vertical
The shape in section is isosceles triangle, or the second vertical cross-section is the ring being made of the straightway of arc section and connection arc section
Shape shape.
Further, the centre distance of adjacent each protrusion element is 1~100 μm.
Further, bulge-structure is by selected from acrylic copolymer, ethylene copolymer, urethane copolymers, poly-
Appointing in ethylene glycol terephthalate, polypropylene, makrolon, polymethyl methacrylate and polyethylene vinyl acetoacetic ester
One or more are made.
Further, transparent material layer is made of the multiple material preparation layers being cascading, and at least one material
Air layer is provided with preparation layers.
Further, material preparation layer by selected from acrylic copolymer, ethylene copolymer, urethane copolymers,
In polyethylene terephthalate, polypropylene, makrolon, polymethyl methacrylate and polyethylene vinyl acetoacetic ester
It is any one or more to be made.
According to another aspect of the present invention, there is provided a kind of back light unit, the back light unit include light source, light guide plate and light
Learn diaphragm, it is characterised in that optical diaphragm includes above-mentioned optical thin film.
Apply the technical scheme of the present invention, the present invention provides a kind of optical thin film including transparent material layer, each air
Passage has curved two corresponding side walls, and the arbitrary section in each air duct parallel to transparent material layer surface has phase
Same shape, so that when incident light is by the air duct, since air duct has curved side wall, makes light by more multi-party
To refraction and scattering, light with more refractions and scattering angle not only make optical thin film with good shielding, but also
The probability of the bad phenomenons such as mole interference, Newton's ring generation is reduced, and then improves conduction efficiency of the light in optical thin film.
Brief description of the drawings
The accompanying drawings which form a part of this application are used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
It is corresponding along curved two of b directions that Fig. 1 shows that each air duct that embodiment of the present invention is provided has
Side wall, and the horizontal profile structure schematic diagram of the symmetrical optical thin film of two corresponding side walls；
Fig. 2 shows that the first vertical cross-section in each air layer that embodiment of the present invention is provided has identical shape
The vertical section structure diagram of shape and the optical thin film of size；
Fig. 3 shows that the shape of the first vertical cross-section in each air layer that embodiment of the present invention is provided is triangle,
Two base angles of triangle are the vertical section structure diagram of the optical thin film of chamfering；
Fig. 4 shows that the shape of the first vertical cross-section in each air layer that embodiment of the present invention is provided is trapezoidal light
Learn the vertical section structure diagram of film；
Fig. 5 shows that the first vertical cross-section is by arc section and company in each air layer that embodiment of the present invention is provided
Connect the vertical section structure diagram of the optical thin film of the shape of the straightway composition of arc section；
Fig. 6 shows that the shape of the first vertical cross-section in each air layer that embodiment of the present invention is provided includes triangle
The shape formed with the straightway by arc section and connection arc section, and the optical thin film that two base angles of triangle are chamfering
Vertical section structure diagram；
Fig. 7, which is shown, is provided with bulge-structure in the transparent material layer surface that embodiment of the present invention is provided, and raised
The shape of the second vertical cross-section is the vertical section structure diagram of the optical thin film of isosceles triangle in structure；And
Fig. 8, which is shown, is provided with bulge-structure in the transparent material layer surface that embodiment of the present invention is provided, and raised
The section knot of the optical thin film for the shape that second vertical cross-section is made of the straightway of arc section and connection arc section in structure
Structure schematic diagram；
Fig. 9 shows the shielding design sketch for the optical thin film that the embodiment of the present invention 3 is provided；
Figure 10 shows the shielding design sketch for the optical thin film that comparative example 1 of the present invention is provided.
Embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.Below with reference to the accompanying drawings and the present invention will be described in detail in conjunction with the embodiments.
It should be noted that term used herein above is merely to describe embodiment, 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 " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
For the ease of description, spatially relative term can be used herein, as " ... on ", " ... 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 appreciated that spatially relative term is intended to comprising the orientation except device described in figure
Outside different azimuth 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 the device of part or construction top " or " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (being rotated by 90 ° or in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
From background technology, barrier is provided with optical thin-film structure in the prior art, can be to whole optical thin film
The conduction of middle light impacts, so that the conduction efficiency of light in back light unit is reduced, and the limitation of barrier material also can
Cause the shielding of optical thin-film structure poor.The present inventor is studied regarding to the issue above, there is provided Yi Zhongguang
Learn film.As shown in Fig. 1 to Fig. 8 the optical thin film includes transparent material layer 20, one or more is additionally provided with transparent material layer 20
A air layer being parallel to each other, each air layer are made of multiple air ducts 10 set gradually along a directions, 10 edge of air duct
Transparent material layer 20 is run through in b directions, and a directions are vertical with b directions, the extension of a directions and b directions each parallel to transparent material layer 20
Surface, each air duct 10 have along the curved two corresponding side walls in b directions, parallel to transparent material in each air duct 10
The arbitrary section on 20 surface of layer is of similar shape.
In the above-mentioned optical thin film of the present invention, when incident light is by the air duct, since air duct is with curved
Bent side wall, makes refraction and scattering of the light by more direction, and the more refractions and scattering angle that light has not only make optical thin film
With good shielding, and the probability of the bad phenomenons such as mole interference, Newton's ring generation is reduced, and then improve light and exist
Conduction efficiency in optical thin film.
In optical thin film provided by the invention, it is preferable that each air duct 10 spaced set successively in air layer.On
The refractive direction for inciding light in air layer can be optimized by stating the air duct 10 of spaced set, be further increased
The shielding of optical thin film, so as to further increase conduction efficiency of the light in optical thin film.
In the above-mentioned optical thin film of the present invention, cut in each air duct 10 parallel to any of 20 surface of transparent material layer
The shape in face can be set according to teachings of the present application.Preferably, two corresponding side walls are symmetrical, its structure is as schemed
Shown in 1；Or the arbitrary section in each air duct 10 perpendicular to b directions is the first vertical cross-section, in each air layer
One vertical cross-section is identically shaped and sized, its structure is as shown in Figure 2.Due in each air duct 10 parallel to transparent material
The arbitrary section on 20 surface of the bed of material has identical above-mentioned shape, so as to incide the refractive direction of light in air layer into
Row optimization, further increases the shielding of optical thin film, so as to further increase conduction efficiency of the light in optical thin film.
Preferably, corresponding side wall has at least one set of sequentially connected lug boss 110 and concave part 120.It is more highly preferred to
Ground, each lug boss 110 and each concave part 120 have identical radian.Wherein, adjacent lug boss 110 and concave part 120 form
The position relationship of side wall element, side wall element protrusions portion 110 and concave part 120 can be set according to the actual requirements, excellent
Selection of land, the distance of the vertex in side wall element protrusions portion 110 and the vertex of concave part 120 on a directions are 0.5~5 μm；Side wall
The horizontal distance of the vertex in unit protrusions portion 110 and the vertex of concave part 120 on b directions is 250~2000 μm.Upper rheme
The relation of putting can make light be refracted out suitable angle when inciding the side wall of air duct 10, so as to further optimize incidence
The refractive direction of light into air layer.
The first vertical cross-section in each air layer can be set according to teachings of the present application, it is preferable that first is vertical
The shape in section includes：Triangle, two base angles of triangle are chamfering, its structure is as shown in figure 3, above-mentioned triangle is included respectively
The triangle of type, such as acute triangle, right angled triangle, obtuse triangle, isosceles triangle and equilateral triangle；Ladder
Shape, its structure is as shown in figure 4, above-mentioned trapezoidal including various types of trapezoidal, trapezoidal as, right-angled trapezium and isosceles trapezoid；
And the annular shape being made of the straightway of arc section and connection arc section, its structure is as shown in figure 5, above-mentioned by arc section
And the shape of the straightway composition of connection arc section includes all kinds, the centering angle of arc section can be small in above-mentioned shape
In 180 ° of any angle.There can also be the first vertical cross-section of various shapes in optical thin film, optical thin film can be with this time
For structure as shown in Figure 6.Since the first vertical cross-section in each air layer has identical above-mentioned shape, so as to entering
The refractive direction for being mapped to light in air layer optimizes, and further increases the shielding of optical thin film, so as to further improve
Conduction efficiency of the light in optical thin film.
Preferably, the distance between each air duct 10 is less than 5 μm in each air layer.Above-mentioned distance range can make sky
There is the suitable air duct 10 of quantity in gas-bearing formation, so as to be optimized to the refractive direction for inciding light in air layer,
The shielding of optical thin film is further increased, so as to further increase conduction efficiency of the light in optical thin film.
In above-mentioned preferred embodiment, it is preferable that optical thin film, which further includes, is arranged at transparent material layer 20 at least one
Bulge-structure on a surface, bulge-structure include multiple protrusion elements 30 along a directions successively spaced set, protrusion element
30 run through transparent material layer 20 along b directions, its structure is as shown in FIG. 7 and 8.Above-mentioned bulge-structure, which can further change, to be incided
The refractive direction of light in air layer, so that incident optical energy accesses the refractive direction more optimized, further increases light and exists
Conduction efficiency in optical thin film.
In above-mentioned preferred embodiment, the arbitrary section in protrusion element 30 perpendicular to b directions is second vertical section
Face, and the shape of the second vertical cross-section is isosceles triangle, or the second vertical cross-section is by arc section and connection arc section
The shape of straightway composition.Second vertical cross-section has above-mentioned preferable annular shape, can further optimize and incide protrusion
The refractive direction of light in structure.
The centre distance of adjacent each protrusion element 30 can be set according to the actual requirements.Preferably, it is adjacent each
The centre distance of protrusion element 30 is 1~100 μm.Above-mentioned distance range can make suitably raised with quantity in bulge-structure
Unit 30, so as to be optimized to the refractive direction for inciding light in bulge-structure, so as to further increase light in light
Learn the conduction efficiency in film.
Preferably, transparent material layer 20 is made of the multiple material preparation layers 210 being cascading, and at least one material
Air layer is provided with material preparation layers 210.The material of material preparation layer 210 and bulge-structure can be set according to the prior art
It is fixed, it is preferable that the material independence of transparent material layer 20 and bulge-structure is selected from acrylic copolymer, ethylene copolymer, amino
Ethyl formate copolymer, polyethylene terephthalate, polypropylene, makrolon, polymethyl methacrylate and polyethylene-
Any of vinyl acetate is a variety of, and the material of material preparation layer 210 is different from the material of bulge-structure.Above-mentioned material
It can make material preparation layer 210 and bulge-structure that there is transparent and translucent property, so that optical thin film has preferably
Penetration performance.
According to another aspect of the present invention, there is provided a kind of back light unit, back light unit include light source, light guide plate and optics
Diaphragm, optical diaphragm include above-mentioned optical thin film.Since above-mentioned optical thin film is arranged at the upper prism of back light unit and lower rib
Between mirror, so that more light can penetrate prism, the utilization rate of light in light source is improved, and also prevent foreign matter entrance
Between upper and lower prism, the normal conduction of light ensure that.
The optical thin film of the application offer is be provided below in conjunction with embodiment.
Embodiment 1
Optical thin film provided in this embodiment is as shown in figure 3, optical thin film includes transparent material layer, and transparent material layer is by one
Layer material preparation layers form, and the material of material preparation layer is acrylic copolymer；
An air layer is additionally provided with transparent material layer, air layer is by multiple air ducts set gradually along a directions
Form, spaced set, air duct run through transparent material layer, a directions and b to each air duct along b directions successively in air layer
Direction is vertical, the extensional surface of a directions and b directions each parallel to transparent material layer；
Air duct has along the curved two corresponding side walls in b directions, and two corresponding side walls are symmetrical, corresponding
Side wall has multigroup sequentially connected lug boss and concave part, and each lug boss and each concave part have identical radian, adjacent
Lug boss and concave part composition side wall element, and the vertex in side wall element protrusions portion and the vertex of concave part are on a directions
Distance is 0.5 μm, adjacent lug boss and concave part composition side wall element, and the vertex in side wall element protrusions portion and concave part
Horizontal distance of the vertex on b directions be 250 μm；
The distance between each air duct is 1 μm in each air layer, parallel to transparent material layer table in each air duct
The arbitrary section in face is of similar shape, and the shape of the first vertical cross-section is isosceles right triangle.
Embodiment 2
Optical thin film provided in this embodiment is as shown in figure 4, optical thin film includes transparent material layer, and transparent material layer is by one
Layer material preparation layers form, and the material of material preparation layer is acrylic copolymer；
An air layer is additionally provided with transparent material layer, air layer is by multiple air ducts set gradually along a directions
Form, spaced set, air duct run through transparent material layer, a directions and b to each air duct along b directions successively in air layer
Direction is vertical, the extensional surface of a directions and b directions each parallel to transparent material layer；
Air duct has along the curved two corresponding side walls in b directions, perpendicular to any of b directions in each air duct
Section is the first vertical cross-section, and the first vertical cross-section in each air layer is identically shaped and sized, corresponding side wall
With multigroup sequentially connected lug boss and concave part, each lug boss and each concave part have identical radian, adjacent protrusion
Portion and concave part composition side wall element, and the distance of the vertex in side wall element protrusions portion and the vertex of concave part on a directions
For 5 μm, adjacent lug boss and concave part form side wall element, and the vertex in side wall element protrusions portion and the vertex of concave part
Horizontal distance on b directions is 2000 μm；
The distance between each air duct is 5 μm in each air layer, parallel to transparent material layer table in each air duct
The arbitrary section in face is of similar shape, and the shape of the first vertical cross-section is trapezoidal.
Embodiment 3
Optical thin film provided in this embodiment is as shown in figure 5, optical thin film includes transparent material layer, and transparent material layer is by one
Layer material preparation layers form, and the material of material preparation layer is acrylic copolymer；
An air layer is additionally provided with transparent material layer, air layer is by multiple air ducts set gradually along a directions
Form, spaced set, air duct run through transparent material layer, a directions and b to each air duct along b directions successively in air layer
Direction is vertical, the extensional surface of a directions and b directions each parallel to transparent material layer；
Air duct has along the curved two corresponding side walls in b directions, and two corresponding side walls are symmetrical, corresponding
Side wall has multigroup sequentially connected lug boss and concave part, and each lug boss and each concave part have identical radian, adjacent
Lug boss and concave part composition side wall element, and the vertex in side wall element protrusions portion and the vertex of concave part are on a directions
Distance is 2 μm, adjacent lug boss and concave part composition side wall element, and the vertex in side wall element protrusions portion and concave part
Horizontal distance of the vertex on b directions is 1000 μm；
The distance between each air duct is 3 μm in each air layer, parallel to transparent material layer table in each air duct
The arbitrary section in face is of similar shape, and the shape of the first vertical cross-section is semicircle.
Embodiment 4
Optical thin film provided in this embodiment is as shown in fig. 6, optical thin film includes transparent material layer, and transparent material layer is by two
Layer material preparation layers form, and the material of upper layer of material preparation layers is ethylene copolymer, and the material of subsurface material preparation layers is propylene
Acid copolymer；
An air layer is respectively arranged with materials at two layers preparation layers, air layer is by multiple skies set gradually along a directions
Gas passage forms, and spaced set, air duct run through transparent material layer, a side to each air duct along b directions successively in air layer
To vertical with b directions, the extensional surface of a directions and b directions each parallel to transparent material layer；
Air duct in materials at two layers preparation layers has pre- along the curved two corresponding side walls in b directions, upper layer of material
Two corresponding side walls in standby layer are symmetrical, appointing perpendicular to b directions in each air duct in subsurface material preparation layers
Meaning section is the first vertical cross-section, and the first vertical cross-section in each air layer is identically shaped and sized；
Corresponding side wall has multigroup sequentially connected lug boss and concave part, and each lug boss and each concave part have identical
Radian, adjacent lug boss and concave part composition side wall element, and the vertex in side wall element protrusions portion and the top of concave part
Distance of the point on a directions is 3 μm, adjacent lug boss and concave part composition side wall element, and side wall element protrusions portion
The horizontal distance of vertex and the vertex of concave part on b directions is 1500 μm；
The distance between each air duct is 3 μm in air layer in materials at two layers preparation layers, parallel in each air duct
It is of similar shape in the arbitrary section of transparent material layer surface, the shape of the first vertical cross-section in upper layer of material preparation layers
It is isosceles right triangle, the shape of the first vertical cross-section in subsurface material preparation layers is semicircle.
Embodiment 5
Optical thin film provided in this embodiment is as shown in fig. 7, optical thin film includes transparent material layer, and transparent material layer is by one
Layer material preparation layers form, and the material of material preparation layer is ethylene copolymer；
An air layer is additionally provided with transparent material layer, air layer is by multiple air ducts set gradually along a directions
Form, spaced set, air duct run through transparent material layer, a directions and b to each air duct along b directions successively in air layer
Direction is vertical, the extensional surface of a directions and b directions each parallel to transparent material layer；
Air duct has along the curved two corresponding side walls in b directions, and two corresponding side walls are symmetrical, corresponding
Side wall has multigroup sequentially connected lug boss and concave part, and each lug boss and each concave part have identical radian, adjacent
Lug boss and concave part composition side wall element, and the vertex in side wall element protrusions portion and the vertex of concave part are on a directions
Distance is 0.5 μm, adjacent lug boss and concave part composition side wall element, and the vertex in side wall element protrusions portion and concave part
Horizontal distance of the vertex on b directions be 250 μm；
The distance between each air duct is 1 μm in each air layer, parallel to transparent material layer table in each air duct
The arbitrary section in face is of similar shape, and the shape of the first vertical cross-section is isosceles right triangle；
Optical thin film further includes the bulge-structure for being arranged at transparent material layer upper surface, and the material of bulge-structure is acrylic acid
Copolymer, bulge-structure include multiple protrusion elements along a directions successively spaced set, and protrusion element is along b directions through saturating
Bright material layer, protrusion element have the second vertical cross-section, and the second vertical cross-section is vertical with b directions, and the shape of the second vertical cross-section
Shape is isosceles right triangle, and the centre distance of adjacent each protrusion element is 1 μm.
Embodiment 6
Optical thin film provided in this embodiment is as shown in figure 8, optical thin film includes transparent material layer, and transparent material layer is by one
Layer material preparation layers form, and the material of material preparation layer is acrylic copolymer；
An air layer is additionally provided with transparent material layer, air layer is by multiple air ducts set gradually along a directions
Form, spaced set, air duct run through transparent material layer, a directions and b to each air duct along b directions successively in air layer
Direction is vertical, the extensional surface of a directions and b directions each parallel to transparent material layer；
Air duct has along the curved two corresponding side walls in b directions, and two corresponding side walls are symmetrical, corresponding
Side wall has multigroup sequentially connected lug boss and concave part, and each lug boss and each concave part have identical radian, adjacent
Lug boss and concave part composition side wall element, and the vertex in side wall element protrusions portion and the vertex of concave part are on a directions
Distance is 5 μm, adjacent lug boss and concave part composition side wall element, and the vertex in side wall element protrusions portion and concave part
Horizontal distance of the vertex on b directions is 2000 μm；
The distance between each air duct is 5 μm in each air layer, parallel to transparent material layer table in each air duct
The arbitrary section in face is of similar shape, and the shape of the first vertical cross-section is isosceles right triangle；
Optical thin film further includes the bulge-structure for being arranged at transparent material layer upper surface, and the material of bulge-structure is total to for ethene
Polymers, bulge-structure include multiple protrusion elements along a directions successively spaced set, and protrusion element is along b directions through transparent
Material layer, protrusion element have the second vertical cross-section, and the second vertical cross-section is vertical with b directions, and the shape of the second vertical cross-section
For semicircle, the centre distance of adjacent each protrusion element is 100 μm.
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 6 and comparative example 1 carries out shielding test, and test method is as follows：Will
Optical thin film is put on rule, and optical thin film and the difference in height of point rule be 10mm, and optical thin film flattens, and with an inspection surface advised
It is horizontal.By optical thin film, 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 3 and comparative example 1
Covering property design sketch, is illustrated in figure 9 the shielding design sketch of embodiment 3, is the shielding effect of comparative example 1 as shown in Figure 10
Figure；
It is applied to 32 " downward backs using the optical thin film that above-described embodiment 1 to 6 and comparative example 1 provide as optical diaphragm
In optical mode group, and its luminosity is tested using luminance test instrument, its briliancy is tested using brightness detector,
Test result is as follows：
From the effect above as can be seen that the optical thin film that is provided of embodiments herein 1 to 6 is compared with comparative example 1, tool
There is thinner thickness, and its luminosity, briliancy and shielding are also higher；And from Fig. 9 and Figure 10 as it can be seen that comparative example 1
Shielding design sketch (Figure 10) is relatively sharp compared with embodiment 3 (Fig. 9), it is seen that the optical thin film of the embodiment of the present application 3 has
The shielding of higher.
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 is supplied, each air duct has curved two corresponding side walls, and each air leads to
Arbitrary section in road parallel to transparent material layer surface is of similar shape, so that when incident light passes through the air duct
When, since air duct has curved side wall, make refraction and scattering of the light by more direction, the more refractions and dissipate that light has
Firing angle degree not only makes optical thin film have good shielding, but also reduces the generation of the bad phenomenons such as mole interference, Newton's ring
Probability, and then improve conduction efficiency of the light in optical thin film.
It these are only the preferred embodiment of the present invention, be not intended to limit the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (16)
1. a kind of optical thin film, the optical thin film includes transparent material layer (20), it is characterised in that the transparent material layer
(20) one or more air layers being parallel to each other are additionally provided with, each air layer is set gradually by multiple along a directions
Air duct (10) forms, and the air duct (10) runs through the transparent material layer (20), a directions and institute along b directions
State that b directions are vertical, a directions and the b directions are each parallel to the extensional surface of the transparent material layer (20), each sky
Gas passage (10) has extends and presents two corresponding side walls of warp architecture, each air duct along the b directions
(10) arbitrary section in parallel to the transparent material layer (20) surface is of similar shape.
2. optical thin film according to claim 1, it is characterised in that in the air layer each air duct (10) according to
Secondary spaced set.
3. optical thin film according to claim 1, it is characterised in that
Two corresponding side walls are symmetrical；Or
Arbitrary section in each air duct (10) perpendicular to the b directions is the first vertical cross-section, each air
First vertical cross-section in layer is identically shaped and sized.
4. optical thin film according to claim 1, it is characterised in that there is the corresponding side wall at least one set to connect successively
The lug boss (110) and concave part (120) connect.
5. optical thin film according to claim 4, it is characterised in that each lug boss (110) and each concave part
(120) there is identical radian.
6. optical thin film according to claim 4, it is characterised in that the adjacent lug boss (110) and the depression
Portion (120) forms side wall element, and the vertex of lug boss (110) described in the side wall element and the concave part (120)
Distance of the vertex on a directions is 0.5~5 μm.
7. optical thin film according to claim 4, it is characterised in that the adjacent lug boss (110) and the depression
Portion (120) forms side wall element, and the vertex of lug boss (110) described in the side wall element and the concave part (120)
Horizontal distance of the vertex on b directions is 250~2000 μm.
8. optical thin film according to claim 3, it is characterised in that the shape of first vertical cross-section includes：
Triangle, two base angles of the triangle are chamfering；
It is trapezoidal；And
The annular shape being made of the straightway of arc section and the connection arc section.
9. optical thin film according to claim 2, it is characterised in that each air duct in each air layer
The distance between (10) it is less than 5 μm.
10. optical thin film according to claim 1, it is characterised in that the optical thin film further include be arranged at it is described
Bulge-structure at least one surface of bright material layer (20), the bulge-structure include multiple along between a directions successively grade
Protrusion element (30) away from setting, the protrusion element (30) extend along the b directions and are arranged at the transparent material layer
(20) surface.
11. optical thin film according to claim 10, it is characterised in that the protrusion element (30) has second vertical section
Face, second vertical cross-section is vertical with the b directions, and the shape of second vertical cross-section is isosceles triangle, or institute
It is the annular shape being made of the straightway of arc section and the connection arc section to state the second vertical cross-section.
12. optical thin film according to claim 11, it is characterised in that the center of adjacent each protrusion element (30)
Distance is 1~100 μm.
13. optical thin film according to claim 10, it is characterised in that the bulge-structure is by selected from acrylic acid copolymer
Thing, ethylene copolymer, urethane copolymers, polyethylene terephthalate, polypropylene, makrolon, poly- methyl
Any of methyl acrylate and polyethylene vinyl acetoacetic ester a variety of are made.
14. optical thin film according to claim 1, it is characterised in that the transparent material layer (20) is set by stacking gradually
Multiple material preparation layers (210) composition put, and it is provided with the air layer at least one material preparation layer (210).
15. optical thin film according to claim 14, it is characterised in that the material preparation layer (210) is by selected from propylene
Acid copolymer, ethylene copolymer, urethane copolymers, polyethylene terephthalate, polypropylene, makrolon,
Any of polymethyl methacrylate and polyethylene vinyl acetoacetic ester a variety of are made.
16. a kind of back light unit, the back light unit includes light source, light guide plate and optical diaphragm, it is characterised in that the optics
Diaphragm includes the optical thin film any one of claim 1 to 15.
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| CN201510391612.2A CN104950511B (en) | 2015-07-06 | 2015-07-06 | Optical thin film and back light unit |
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| CN111295606B (en) * | 2017-11-01 | 2023-07-21 | 日东电工株式会社 | Light distribution structures and elements, related methods and uses |
| CN110397205A (en) * | 2019-07-29 | 2019-11-01 | 江苏碳元绿色建筑科技有限公司 | Novel graphite plate, preparation method thereof and graphite radiation ceiling board |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4895420A (en) * | 1988-08-22 | 1990-01-23 | Gte Products Corporation | High reflectance light guide |
| CN102209919A (en) * | 2008-10-06 | 2011-10-05 | 兰布士国际有限公司 | Cavity reflector light injection for flat panel displays |
| CN103675964A (en) * | 2012-09-14 | 2014-03-26 | 群康科技(深圳)有限公司 | Optical film and display device comprising same |
| CN104678650A (en) * | 2015-01-14 | 2015-06-03 | 友达光电股份有限公司 | Backlight module |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002289020A (en) * | 2001-03-28 | 2002-10-04 | Sharp Corp | Image display device and lighting device used for the same |
| JP4059692B2 (en) * | 2001-04-24 | 2008-03-12 | シャープ株式会社 | Illumination device, display device including the same, and light guide plate |
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2015
- 2015-07-06 CN CN201510391612.2A patent/CN104950511B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4895420A (en) * | 1988-08-22 | 1990-01-23 | Gte Products Corporation | High reflectance light guide |
| CN102209919A (en) * | 2008-10-06 | 2011-10-05 | 兰布士国际有限公司 | Cavity reflector light injection for flat panel displays |
| CN103675964A (en) * | 2012-09-14 | 2014-03-26 | 群康科技(深圳)有限公司 | Optical film and display device comprising same |
| CN104678650A (en) * | 2015-01-14 | 2015-06-03 | 友达光电股份有限公司 | Backlight module |
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