WO2020118962A1 - 一种背板组件用反光贴条及其制备方法 - Google Patents

一种背板组件用反光贴条及其制备方法 Download PDF

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Publication number
WO2020118962A1
WO2020118962A1 PCT/CN2019/079422 CN2019079422W WO2020118962A1 WO 2020118962 A1 WO2020118962 A1 WO 2020118962A1 CN 2019079422 W CN2019079422 W CN 2019079422W WO 2020118962 A1 WO2020118962 A1 WO 2020118962A1
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Prior art keywords
reflective
layer
prism
triangle
substrate layer
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PCT/CN2019/079422
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English (en)
French (fr)
Inventor
唐海江
夏寅
周鼎
高斌基
汪诚
刘建凯
李刚
张彦
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宁波激智科技股份有限公司
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Publication of WO2020118962A1 publication Critical patent/WO2020118962A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/122—Reflex reflectors cube corner, trihedral or triple reflector type
    • G02B5/124—Reflex reflectors cube corner, trihedral or triple reflector type plural reflecting elements forming part of a unitary plate or sheet
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/10—Mirrors with curved faces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/09—Multifaceted or polygonal mirrors, e.g. polygonal scanning mirrors; Fresnel mirrors

Definitions

  • the invention relates to a reflective sticker for a backplane component, in particular to a reflective sticker for a backplane component with a microstructure of a concave arc prism array, which can adapt to different sunlight angles and a preparation method thereof.
  • a prism generally has the following two uses:
  • the three sides corresponding to the three sides are all light-transmitting surfaces, as an optical transmission structure.
  • the two sides of the refracted light path as a beam splitter, or use reflection, total reflection, refracted light path as a mirror, you can also use the two side refracted upward light path as a condenser, or even use two sides combined with a special 90 ° top
  • the corner acts as a mirror.
  • the surface corresponding to at least one side is a reflective surface, which serves as an optical reflective structure.
  • a reflective surface which serves as an optical reflective structure.
  • the reflection surface can be used to form a multiple reflection light path.
  • As a light guide it is typically used in applications such as underwater periscope and outdoor light collection and transmission.
  • Chinese patent application 200420034925.X (January 14, 2004) discloses a simulated window-type natural light collection and transmission device
  • Chinese patent application 201420617918.6 discloses a Single camera panoramic recording device
  • Chinese patent application 200910079162.8 (March 3, 2009) discloses a mirror image stereo camera device and method.
  • the reflective prism structure is a traditional prism structure, all sides of the cross-sectional triangle are straight lines, or that any side is a standard plane, this structure can only Complete simple light path reflection, when the parallel light source is incident, the parallelism of the outgoing light cannot be broken, let alone modified to meet the specific light path reflection law (such as raising or lowering the average reflection direction, which is convenient for other related components to complete).
  • the specific light path reflection law such as raising or lowering the average reflection direction, which is convenient for other related components to complete
  • the requirements for collection, re-reflection, and re-transmission of reflected light, or pure light disturbance or light convergence have led to the application limitations of traditional prism structures.
  • the existing reflective strips for the backplane components adopt a common triangular prism structure, and the parallel reflection optical path cannot be changed.
  • the present invention provides a reflective strip for backplane components that can change the parallel reflective optical path and a preparation method thereof.
  • the reflective tape used for the backplane assembly adopts a concave arc prism structure, which can change the parallel reflected light path and make the reflected light path produce a deflection angle.
  • the linear light source is modified into a non-parallel light path for the modification of the parallel light path.
  • the invention also solves the problem of the traditional reflective prism structure, when the parallel light path of the linear light source is incident on its reflection surface, the parallel reflection light path cannot be changed.
  • the invention also provides a prism structure for parallel light path modification, a preparation method thereof, and a prism array.
  • the reflective surface of the triangular prism structure is a concave arc surface, and the linear light source can be modified into a non-parallel light path, so that the reflected light path produces a deflection angle.
  • the present invention adopts the following technical solutions:
  • the invention provides a reflective sticker for a backplane assembly.
  • the reflective sticker for a backplane assembly includes a prism array.
  • the prism array includes a structural layer and a substrate layer.
  • the structural layer is placed on the substrate layer.
  • the structure layer includes a plurality of triangular prism structures (referred to as a triangular prism), the triangular prism structure has a triangular cross section, at least one side of the triangle is an arc shape concave toward the triangle, and at least one side surface of the triangular prism structure is a concave arc Surface, the concave arc surface is a reflective surface.
  • the reflective tape for the backplane assembly includes a hot-melt bonding layer and a prism array, and the hot-melt bonding layer is placed under the substrate layer of the prism array.
  • the invention also provides a reflective sticker for a backplane assembly
  • the reflective sticker for a backplane assembly includes a hot-melt bonding layer and a prism array (also called a prism structure array), and the prism array includes a structure layer and a bottom Material layer
  • the structural layer is placed on the substrate layer
  • the structural layer includes a number of triangular prism structures
  • the triangular prism structure has a triangular cross-section
  • the two sides of the triangle are curved inwards into the triangle
  • the two sides of the prism structure are concave arc surfaces, and the concave arc surfaces are reflective surfaces
  • the hot-melt bonding layer is placed under the substrate layer of the prism array.
  • the triangular prism structure covers the surface of the substrate layer.
  • the two side surfaces of the prism structure include a left reflecting surface and a right reflecting surface, and the left reflecting surface and the right reflecting surface are concave arc surfaces.
  • the left reflective surface of the cross-section (triangle) of the structural layer is a concave circular arc with the direction angle ⁇ 2 of the chord corresponding to the center angle of ⁇ a
  • the right reflective surface is a concave circular arc with the direction angle ⁇ 2 of the chord
  • the corresponding central angle is ⁇ b .
  • the longitudinal extension direction of the prism structure and the edge extension direction of the substrate form an angle of 45 degrees.
  • the material of the substrate layer is selected from a polymer material that can be formed into a film; the material of the structural layer is selected from a polymer material that can be formed or the same material as the substrate layer.
  • the thickness of the substrate layer is 0.012 to 0.3 mm, which is selected according to needs.
  • the hot-melt bonding layer includes a layer of hot-melt adhesive film, such as EVA, or PVC, etc., which shows stickiness when heated, and can be used for hot bonding.
  • hot-melt adhesive film such as EVA, or PVC, etc.
  • the thickness of the hot-melt bonding layer is 0.01 to 0.1 mm, preferably 0.02 to 0.05 mm.
  • the invention also provides a method for preparing the reflective sticker, the method comprises the following steps:
  • the structure layer of the semi-finished product A is subjected to a reflective treatment to obtain a semi-finished product B of a reflective film containing a curved reflective prism array;
  • the backside of the substrate layer of the semi-finished product B is subjected to hot-melt bonding layer treatment (adhesive treatment), and the semi-finished product C can be produced by hot-melt adhesive coating.
  • the reflective tape can be used on photovoltaic modules. It can be hot-melted on the welding tape by the residual temperature of the welding tape (as shown in FIG. 12), which can redirect the sunlight that could not be used in this area by light redirection. Recycling improves the power of components. Because the structure and the slitting direction have an included angle of 45 degrees (as shown in FIG. 13), it is suitable for both horizontally and vertically mounted components.
  • the reflective strip of the arc-edge structure can better adapt to the reflection of sunlight at different angles , And redirect it and recycle it through total reflection of slides.
  • the invention also provides a prism structure, the cross-section of the prism structure is a triangle, the two sides of the triangle are curved inwards into the triangle, and the two sides of the prism are concave arcs, the The concave arc surface is a reflective surface.
  • the concave arc surface of the triangular prism structure is a reflective surface, which is also referred to as a concave arc surface reflective prism structure.
  • the concave curved surface reflective prism structure can gradually modify the optical path, and can also be called a concave curved surface reflective triangular prism structure whose optical path can be modified gradually.
  • the left side of the triangle, the center angle of the arc is ⁇ a , and the direction angle of the chord is ⁇ 2 ; the right side of the triangle, the arc is the center The angle is ⁇ b , the direction angle of the chord is ⁇ 2 , and the height of the triangle is H; ⁇ 2 and ⁇ 2 are both acute angles.
  • the shape of the left half of the triangle can be determined by H, ⁇ 2 and ⁇ a ; the shape of the right half of the triangle can be determined by H, ⁇ 2 and ⁇ b .
  • the height H of the prism configuration the range of H is 10 -2 ⁇ 10 2 mm, depending on the application selected is not preferable.
  • the height H of the prism structure can be selected from 10 -2 to 1 mm, 1 to 10 2 mm, 0.1 mm, or 10 mm.
  • the triangular prism structure only defines the shape and does not define the size, and the size change meets the similarity principle.
  • the left side arc side and the right side arc side of the triangle are asymmetric, ⁇ 2 ⁇ 2 or ⁇ a ⁇ b .
  • the ranges of ⁇ 2 and ⁇ 2 are respectively 15° to 75°.
  • ⁇ 2 and ⁇ 2 are preferably 30° to 60°, respectively. Further, ⁇ 2 and ⁇ 2 are preferably 45°, respectively. Both ⁇ a and ⁇ b are acute angles, and the range is 0.5° to 45°, preferably 5° to 20°, and further preferably 10°.
  • the side surface of the triangular prism structure is subjected to light reflecting treatment to form a light reflecting surface.
  • the reflective treatment on the surface of the prism is a method for generating a reflective surface on the surface by using any chemical or physical process, including metal coating on the structural layer and polymer coating, or directly polishing or calendering the structural layer material itself.
  • a reflective layer is provided on the concave arc surface of the triangular prism structure.
  • the reflective layer is also called a reflective surface.
  • the reflective surface is the reflective surface.
  • the material of the reflective layer is selected from metal plating, polymer coating, or the same material as the structural layer.
  • the shape of the reflective layer is a concave arc.
  • the reflective layer is a reflective surface.
  • the triangular prism structure further includes a substrate layer, and the substrate layer is closely attached to the bottom surface of the triangular prism.
  • the thickness T of the substrate layer is 0.1 to 10H, and T is preferably 1H.
  • the material of the structural layer is selected from one or a combination of at least two of polymer materials, metal materials or non-metallic materials; the material of the substrate layer is selected from polymer materials or the same as the structure layer material.
  • the prism structure provided by the present invention can modify the parallel light path of the linear light source into a non-parallel light path through reflection, and the modification effect is used to meet the specific light path reflection law (such as raising or lowering the average reflection direction, which is convenient for other related components to complete the collection of reflected light , Re-reflection, re-transmission and other requirements, or pure light disturbance or light convergence), thus breaking the application limitations of the traditional reflective prism structure.
  • the specific light path reflection law such as raising or lowering the average reflection direction, which is convenient for other related components to complete the collection of reflected light , Re-reflection, re-transmission and other requirements, or pure light disturbance or light convergence
  • the prism structure and the prism array provided by the present invention have the following characteristics: the linear light source can be modified into a non-parallel optical path through the arc-shaped reflective surface, so that the reflected optical path produces a deflection angle. It can be used in the occasions that need to disturb the straight-line optical path or control its exit light angle to meet a specific deflection angle.
  • the reflective strips for backplane components adopt a concave arc prism structure, which can change the parallel reflected light path, make the reflected light path have a deflection angle, and modify the linear light source to be non-reflective.
  • the parallel light path is used to modify the parallel light path.
  • the reflective tape of the arc-edge structure can better adapt to the reflection of sunlight at different angles, redirect it and recycle it through total reflection of the glass slide.
  • Figure 1 is an analysis diagram of the light path direction angle on the micro-element reflection interface
  • FIG. 2 is a diagram of the light path incident on the left half of the cross section of the traditional reflective prism structure
  • FIG. 3 is a diagram of the light path incident on the left half of the cross-section of the concave arc reflective prism structure
  • Figure 4 is a complete traditional reflective prism structure
  • Figure 5 is a structure array of a traditional reflective prism containing a substrate
  • Figure 8 is a two-layer prism array of the same material for the substrate and the structural layer
  • Figure 9 is a three-prism array of the same material as the substrate, the structural layer, and the reflective surface;
  • Figure 10 The numerical relationship of the radius of the arc, the focal point of the symmetrical outgoing light, the distance from the focal point to the chord, and the chord length
  • FIG. 11 Schematic diagram of reflective stickers
  • FIG. 12 Schematic diagram of the fitting of reflective stickers
  • FIG. 13 Schematic diagram of the application of reflective stickers on photovoltaic modules.
  • Micro element reflection interface any curve can be decomposed by micro element method
  • the tangent line at the point of incidence and the normal normal to the tangent line are symmetrical about the normal line on the reflection plane based on the incident light and the reflected light to determine the complete reflected light path.
  • Figure 1 shows the analysis diagram of the light path direction angle on the micro-element reflection interface.
  • the micro-element reflection interface 02 is regarded as a straight line, and its direction angle is ⁇ 0 , then the direction angle of the normal 09 must be 90° + ⁇ 0 , if the direction angle of the parallel incident light source 07 is generally Then the direction angle of its reverse ray (equivalent to the direction angle of the straight line) is 180° counterclockwise, which is Then the deflection angle of the normal and the reverse ray of the incident light (the former-the latter) is According to the principle of symmetry, the incident light reverse ray and the outgoing light are completely symmetrical about the normal, then the deflection angle of the outgoing light and the normal (the former-the latter) is also therefore
  • Figure 2 shows the light path incident on the left half of the cross section of the traditional reflective prism structure.
  • the direction angle of the parallel incident light source 07 is The direction angle of its reverse ray 08 is The direction angle of the left reflective interface 05 is ⁇ 0 , then the direction angle of the tangent 50 at any position on 05 is also ⁇ 0 (50 and 05 coincide, so the label is omitted in the figure), the direction of the normal 500 in polar coordinates The angle is 90°+ ⁇ 0.
  • the incident light 501 hits any position on the reflective interface 05
  • the direction angle of the corresponding reflected light 503 of 501 is all It can be found that all the outgoing rays are always parallel, and their ⁇ a with It has nothing to do with ⁇ 0 .
  • Figure 3 shows the light path incident on the left half of the cross section of the concave arc reflective prism structure.
  • the direction angle of the parallel incident light source 07 is The direction angle of its reverse ray 08 is The tangent line defining the upper and lower end points of the concave arc is called the upper and lower tangent line.
  • the direction angle of the lower tangent line 51 where the left reflective interface 05 is located is ⁇ 1
  • the direction angle of the normal 510 is 90°+ ⁇ 1
  • the direction of the upper tangent line 53 The angle is ⁇ 3
  • the direction angle of the normal 530 is 90°+ ⁇ 3
  • the direction angle of the tangent 50 at any position in the middle region is ⁇ 0
  • the direction angle of the normal 500 is 90°+ ⁇ 0 .
  • the direction angle corresponding to the reflected light 513 is When the incident light 531 at the upper end is incident on the upper tangent point of the arc, the direction angle corresponding to the reflected light 533 is When the perpendicular incident light 501 in the middle region enters the middle region of the arc, the direction angle corresponding to the reflected light 503 is Obviously Between versus between. It is easy to find that the reflected light incident at different positions can no longer be kept parallel to each other. That is, ⁇ a is only related to ⁇ a , and It has nothing to do with ⁇ n .
  • the minimum direction angle of reflected light is 90°+2 ⁇ 1
  • the maximum direction angle is 90°+2 ⁇ 3
  • the angle between the left side of the cross section of the prism and the horizontal line is ⁇ 2 , and ⁇ 2 is called the direction angle of the left side.
  • the angle between the right side of the cross section of the prism and the horizontal line is ⁇ 2 , and ⁇ 2 is called the direction angle of the right side.
  • H is the height of the triangle in the cross section of the prism structure. H is also the height of the structural layer.
  • the optional height H of the structural layer is 10 -2 ⁇ 10 2 mm, which can be selected according to the actual optical device size and use occasion, H is 10 -2 ⁇ 1mm It is more suitable for application in micro-structured optical devices, H is 1 ⁇ 10 2 mm is more suitable for application in ordinary optical devices.
  • the optional materials of the structural layer are polymer materials, metal materials, inorganic non-metallic materials, etc.: the polymer materials can be general plastics, engineering plastics, general plastics, rubber, polymer coatings, etc.
  • the structural parts are preferably engineering plastics, For general plastics and polymer coatings (after curing), considering the cost, ease of manufacture, and ease of surface treatment, polymer coatings are preferred for microstructures, especially acrylic resins (PMMA) that facilitate the formation of photocurable transfer microstructures.
  • General structural parts are preferably polycarbonate (PC) and organic glass (PMMA); metal materials can be selected from ferrous metals, nonferrous metals, special metals and alloys, etc.
  • micro-structured parts are rolled by aluminum foil, copper foil, tin foil, etc. with good ductility; inorganic non-metallic materials can be selected from glass and ceramics, and glass is generally preferred for both general structural parts and microstructured parts (SiO 2 is the main component), And all need to be processed by precision cutting.
  • the material of the substrate layer can be selected as the material of the same structural layer, and the primary molding process (injection, casting, calendering, precision cutting, etc.) can be used in conjunction; the material different from the structural layer can also be selected, and the secondary molding process (compound, Transfer, etc.).
  • the material different from the structural layer is preferably a polymer material, such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycarbonate (PC), polymethacrylic acid
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • PC polycarbonate
  • PMMA polymethyl ester
  • PS polystyrene
  • PP polypropylene
  • PE polyethylene
  • the material of the reflective layer can be selected as metal coating or polymer coating. Both general structural components and micro-structural components can be selected for metal coating.
  • the coating material can be silver, aluminum, etc. For cost, Unless silver plating is required for high reflectivity, aluminum plating is sufficient; general structural parts can also be selected as polymer coatings, and the coating pigment is preferably TiO 2 (commonly used for white reflection); polymer coatings Flatness is not as accurate as metal plating, and it will produce a certain proportion of diffuse reflection. Therefore, structural devices, especially micro-structured devices that require high reflection accuracy, prefer metal plating.
  • the material of hot melt adhesive can be thermoplastic polymer adhesive system, such as polyethylene, polypropylene, polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), polystyrene system, polyamide system, Polycarbonate system, polyoxymethylene, thermoplastic polyester, polyphenylene ether, polyphenylene sulfide, polysulfone, polyketones, or polyphenylene ester, etc., generally preferred is the more general EVA, PVC, etc.
  • the structural layer material when the height H of the structural layer is between 1 and 10 2 mm, there is preferably no substrate layer, the structural layer material is preferably SiO 2 , PMMA, PC, stainless steel, aluminum alloy, and the reflective layer material is preferred It is Al, Ag, TiO 2 ; when the height H of the structural layer is 10 -2 ⁇ 1mm, there is preferably a substrate layer, the material is preferably PET, the structural layer material is preferably PMMA, the reflective layer material is preferably Al, Ag, the substrate The thickness T of the layer can be selected from 0.1 to 10H, preferably 1H.
  • a complete traditional reflective prism structure 09 for comparison includes a structural layer 091, a reflective surface 092, a structural layer cross-section 03, a reflective interface 05 on the left side is a straight line, and a directional angle ⁇ 2 is 30°, right
  • the side reflection interface 06 has a direction angle ⁇ 2 of 30°, wherein the height H of the structural layer is 10 mm, the structural layer material is SiO 2 , and the reflective surface material is Al.
  • the conventional reflective prism structure array 09 containing a substrate for comparison includes a structural layer 091, a reflective surface 092, a substrate layer 093, a structural layer cross section 03, and the left reflective interface 05 is a straight line, direction The angle ⁇ 2 is 30°, the right reflection interface 06 is a straight line, the direction angle ⁇ 2 is 30°, wherein the structural layer height H is 0.1 mm, the structural layer material is PMMA, and the substrate layer thickness T is 1 of the structural layer height H Times, that is 0.1mm, the material is PET, and the reflective surface material is Al.
  • the entire concave arc reflective prism structure 10 provided by the present invention includes a structural layer 101, a left reflective surface 102, a right reflective surface 103, a structural layer cross section 04, and a left reflective interface 05 which is a concave circle
  • the direction angle ⁇ 2 of the chord is 15°
  • the corresponding center angle is ⁇ a is 10°
  • the right reflection interface 06 is a concave arc
  • the direction angle ⁇ 2 of the chord is 15°
  • the corresponding center angle is ⁇ b It is 10°, where the height H of the structural layer is 10 mm
  • the material of the structural layer is SiO 2
  • the material of the left reflective surface is Al
  • the material of the right reflective surface is Al.
  • the chord direction angle ⁇ 2 is 30°
  • the chord direction angle ⁇ 2 is 30°
  • the chord direction angle ⁇ 2 and the corresponding center angle are ⁇ a
  • the corresponding center angle is ⁇ b
  • the height H of the structural layer, the material of the structural layer, and the material of the left or right reflective surface refer to Table 3.
  • the concave curved reflective prism structure array 10 includes a structural layer 101, a left reflective surface 102, a right reflective surface 103, a substrate layer 104, a structural layer cross section 04, and a left reflective
  • the interface 05 is a concave arc
  • the direction angle of the chord is ⁇ 2 is 15°
  • the corresponding center angle is ⁇ a is 10°
  • the right reflection interface 06 is the concave arc
  • the direction angle of the chord is ⁇ 2 is 15°
  • the material of the structural layer is PMMA
  • the material of the left reflective surface is Al
  • the material of the right reflective surface is Al
  • the substrate The layer material is PET.
  • the chord direction angle ⁇ 2 is 30°
  • the chord direction angle ⁇ 2 is 30°
  • the chord direction angle ⁇ 2 and the corresponding center angle are ⁇ a
  • the chord direction angle ⁇ 2 in the right reflection interface 06, the chord direction angle ⁇ 2 ,
  • the corresponding center angle is ⁇ b , the height H of the structural layer, the thickness T of the substrate layer, the material of the structural layer, the material of the left or right reflective surface, and the material of the substrate layer refer to Table 4.
  • the concave arc reflective prism structure array 10 includes a structural layer 101, a left reflective surface 102, a right reflective surface 103, a substrate layer 104, a structural layer cross section 04, and a left reflective
  • the interface 05 is a concave arc
  • the direction angle of the chord is ⁇ 2 is 45°
  • the corresponding center angle is ⁇ a is 10°
  • the right reflection interface 06 is the concave arc
  • the direction angle of the chord is ⁇ 2 is 45°
  • the material of the structural layer is PMMA
  • the material of the left reflective surface is Al
  • the material of the right reflective surface is Al
  • the substrate The layer material is PMMA.
  • the structure layer material is PC
  • the substrate layer material is PC
  • the structure layer material is SiO 2 and the substrate layer material is SiO 2 .
  • the concave arc reflective prism structure array 10 includes a structural layer 101, a left reflective surface 102, a right reflective surface 103, a substrate layer 104, a structural layer cross section 04, and a left reflective
  • the interface 05 is a concave arc
  • the direction angle of the chord is ⁇ 2 is 45°
  • the corresponding center angle is ⁇ a is 10°
  • the right reflection interface 06 is the concave arc
  • the direction angle of the chord is ⁇ 2 is 45°
  • corresponding The center angle is ⁇ b is 10°, in which the height H of the structural layer is 0.1 mm
  • the thickness of the substrate layer T 1H
  • the material of the structural layer, the material of the left side or the reflective surface, and the material of the substrate layer are all Al.
  • the material of the structure layer, the material of the reflective surface and the material of the substrate layer are all Sn. As shown in Figure 9.
  • the material of the structure layer, the material of the reflective surface and the material of the substrate layer are all Cu. As shown in Figure 9.
  • the reflective sticker 17 provided by the present invention includes a hot-melt bonding layer 18 and a prism array.
  • the prism array includes a structure layer 101 and a substrate layer 104; the structure layer 101 includes a plurality of prism structures, and the prism structure It includes a left reflective surface 102 and a right reflective surface 103, wherein the structural layer is a concave arc reflective prism structure array, and the hot melt bonding layer 18 includes a hot melt adhesive 181.
  • the cross-section 04 of the structural layer, the left reflective interface 05 is a concave arc
  • the direction angle ⁇ 2 of the chord is 15°
  • the corresponding center angle is ⁇ a
  • ⁇ a is 10°
  • the right reflective interface 06 is a concave arc.
  • the direction angle ⁇ 2 of the chord is 15°
  • the corresponding center angle is ⁇ b
  • ⁇ b is 10°
  • the structural layer material is PMMA
  • the left reflective surface material is Al
  • the right reflective surface material is Al
  • the substrate layer material is PET
  • the hot melt adhesive material is EVA.
  • the thickness of the substrate layer is 0.012 mm. As shown in Figure 11.
  • the thickness of the substrate layer is 0.3 mm. As shown in Figure 11.
  • the thickness of the substrate layer is 0.012 mm. As shown in Figure 11.
  • the thickness of the hot-melt adhesive is 0.01 mm. As shown in Figure 11.
  • the thickness of the hot melt adhesive is 0.1 mm. As shown in Figure 11.
  • the material of the substrate layer is polycarbonate. As shown in Figure 11.
  • the material of the hot melt adhesive is PVC. As shown in Figure 11.
  • the protection ranges of the different structural parameters of the structural layer refer to Examples 23-45, and will not be repeated here.
  • the main performance of the prism structure or the prism array whose optical path can be gradually modified provided by the present invention is evaluated in the following manner.
  • the maximum deflection angle ⁇ a / ⁇ b of the reflected light of the parallel light source is used to evaluate the modification effect of the optical path.
  • the focal point 14, the distance from the focal point to the chord 15, the chord length 16, and their numerical relationships are shown in Figure 10 (the radius of curvature R is expressed in 100 units).
  • ⁇ a / ⁇ b very weak (0°,0.5°) ⁇ weak[0.5°,5°) ⁇ weak [5°,10°) ⁇ moderate [10°,20°) ⁇ comparative Strong [20°, 30°) ⁇ strong [30°, 45°] ⁇ extremely strong (45°, 60°).
  • the range of ⁇ a / ⁇ b should be selected between the weak and strong modification effect, that is, 0.5 to 45°, and the preferred range is weaker to suitable, that is, 5 to 20°, because the lower limit range is more universal. Yes, and the lower limit is more preferably 10° as the optimum value in the moderate range.
  • the direction angle of the concave-convex structure of the prism structure or the side arc chord (same as the average direction angle) is used to evaluate the sensitivity and accuracy.
  • the sensitivity and accuracy levels are the same, they are considered to be balanced, and when the level difference is 1 to 2 levels, they are regarded as unbalanced, and the level difference is 3 ⁇ Level 4 is regarded as extremely unbalanced, as shown in Table 2.
  • the sensitivity evaluation level from low to high is:
  • the accuracy evaluation level from high to low is:
  • the lateral bending degree of the structural layer is affected by ⁇ a or ⁇ b .
  • the straighter arc surface is easier to process, the macro structural parts are easier to demold, cut, polish, and polish, and the micro structural parts are easier to fill, demold, and calender.
  • the size of the structural layer is affected by the height H.
  • the larger the H the larger the structural layer, and vice versa.
  • the size can enlarge or reduce all the processing difficulties at the same time.
  • the processing accuracy is also determined. Under the same processing accuracy, the larger the size, the lower the difficulty, and the smaller the size, the more difficult Big.
  • H belongs to 10 -2 ⁇ 1mm, it belongs to the micro-processing category.
  • H is closer to 10 -2 mm, the processing is more difficult, when H is closer to 1mm, the processing is simpler; generally, H is 1 When it is ⁇ 10 2 mm, it belongs to the category of macro processing.
  • H is closer to 1 mm, the processing is more difficult.
  • H is closer to 10 2 mm the processing is simpler;
  • the embodiments of the present invention all have a certain effect on the modification of the output light path of the parallel light source, breaking through the functional limitations of the traditional reflective prism: (a), through the comparison of Examples 1-22, we can find that When the direction angle ⁇ 2 or ⁇ 2 of the side arc chord is within the preferred range of 15 to 75° and the end value is 15° or 75°, the sensitivity and accuracy of the optical processing are extremely unbalanced, and the structural layer is too sharp at 75°. The processing difficulty is high. In the further preferred range of 30 to 60°, when the end value is 30° or 60°, the sensitivity and accuracy of the optical processing are still unbalanced, and the structural layer is still sharp at 60°, and the processing difficulty is still relatively high.
  • Example 3 is the best, the optical processing is balanced and the processing difficulty is moderate; (b), through the comparison of Example 3 and Example 6-9 can be found, when the side arc Corresponding to the center angle ⁇ a or ⁇ b in the preferred range of 0.5 to 45°, with an end value of 0.5° or 45°, either 0.5° of the optical modification effect is weak, or the 45° side is too bent to cause high processing difficulty, and the further preferred range is 5 to When the end value of 20° is 5° or 20°, the optical modification effect of 5° is still weak, or the side is too bent at 20°, which makes the processing difficult and still not optimal.
  • the final further preferred value is 10°
  • Example 3 is the best, the optical modification effect is moderate and the processing difficulty is also moderate;
  • (c) through the comparison of Examples 3 and 10 and 11, it can be found that when the structural height H is in the preferred range of macroscopic scale of 1 to 10 2 mm, take the end values 10 0 mm, the middle value (median value index) 10 1 mm, when the end value of 10 2 mm, as H increases the difficulty of processing caused by the size decreases, the entire device according to claim matching needs to select the appropriate size, the general
  • the structural parts of standard size are usually preferably 10mm, and the processing difficulty is also moderate;
  • (d) through the comparison of Examples 3 and 12-19, it can be found that the material of the structural layer and the reflective surface does not affect the optical performance and processing difficulty, and can be based on actual needs , Using different structure sizes, with a choice of SiO 2 , PMMA, PC, stainless steel, aluminum alloy and other structural layers, and Al, Ag, TiO 2 reflective surface; it should
  • Table 3 also lists examples 20, 21, and 22.
  • the entire concave arc reflective structure is also left-right asymmetric, using three asymmetric elements, that is, a triangular shape ( ⁇ 2 ⁇ ⁇ 2 ), asymmetric side arc curvature ( ⁇ a ⁇ b ), and differentiated reflective surface material (left Al and right Ag).
  • ⁇ 2 ⁇ ⁇ 2 triangular shape
  • ⁇ a ⁇ b asymmetric side arc curvature
  • differentiated reflective surface material left Al and right Ag
  • the thickness T of the substrate cannot be represented in the table.
  • the other embodiments are all 1H, only the embodiments 34 and 35 are different, which are 10H and 0.1H, respectively. Among them, the substrate of Example 34 is thicker, and the extra cost is too high, and the substrate of Example 35 is too thin, which makes the forming difficult.
  • the embodiments of the present invention all have a certain effect on the modification of the output light path of the parallel light source, breaking through the functional limitations of the traditional reflective prism array: (a), it can be found through the comparison of Examples 23 to 27 , When the direction angle ⁇ 2 or ⁇ 2 of the side arc chord is within the preferred range of 15 to 75° and the end value is 15° or 75°, the sensitivity and accuracy of the optical processing are extremely unbalanced, and the structural layer is too sharp at 75° The processing difficulty is high. In the further preferred range of 30 to 60°, when the end value is 30° or 60°, the sensitivity and accuracy of optical processing are still unbalanced, and the structural layer is still sharp at 60°, and the processing difficulty is still high.
  • Example 25 with a further preferred value of 45° is the best.
  • the optical processing is balanced and the processing difficulty is moderate. Therefore, the selectable range of ⁇ 2 and ⁇ 2 is 15° to 75°, preferably 30° to 60 °, further, preferably 45°; (b), through comparison of Examples 25 and 28-31, it can be found that when the side arc corresponds to the center angle ⁇ a or ⁇ b in the preferred range of 0.5 to 45°, the end value is taken At 0.5° or 45°, either 0.5° optical modification effect is weak, or the 45° side is too bent, which makes the processing difficult.
  • the range of 5 to 20° is 5° or 20°, or 5° optical modification effect It is still weak, or the 20° side is too bent, resulting in high difficulty in processing, which is still not optimal.
  • Example 25 with a further preferred value of 10° is the best.
  • the optical modification effect is moderate and the processing difficulty is also moderate. Therefore,
  • the selectable range of ⁇ a and ⁇ b is 0.5° to 45°, preferably 5° to 20°, and further preferably 10°.
  • Table 4 also lists two examples 44, 45, the concave arc
  • the surface reflective structure is asymmetrical on the left and right sides, and adopts two asymmetrical elements, namely, a triangular shape ( ⁇ 2 ⁇ 2 ) and an asymmetric side arc curvature ( ⁇ a ⁇ b ).
  • ⁇ 2 ⁇ 2 triangular shape
  • ⁇ a ⁇ b asymmetric side arc curvature

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Abstract

一种背板组件用反光贴条（17），尤其涉及一种背板组件用反光贴条（17）及其制备方法。为了解决现有背板组件用反光贴条不能改变平行反射光路的问题，提供一种能够改变平行反射光路的背板组件用反光贴条（17）及其制备方法。背板组件用反光贴条（17）包括三棱镜阵列（10），三棱镜阵列（10）包括结构层（101）和底材层（104），结构层（101）置于底材层（104）上，结构层（101）包括若干三棱镜结构，三棱镜结构的横截面（04）为三角形，三角形的至少一个侧边为向三角形内凹的弧形，三棱镜的至少一个侧面为凹弧面，凹弧面为反光面。背板组件用反光贴条（17）采用凹弧面三棱镜结构，能够改变平行反射光路，使反射光路产生偏转角，将直线光源修饰为非平行光路，用于平行光路修饰。

Description

一种背板组件用反光贴条及其制备方法 技术领域
本发明涉及一种背板组件用反光贴条，尤其涉及一种具有凹弧面三棱镜阵列微结构的，可适应不同日照角度的背板组件用反光贴条及其制备方法。
背景技术
传统的三棱镜其截面一般为标准的三角形结构，甚至是特殊的正三角形或等腰三角形等。三棱镜作为光学结构一般有如下两种用途：
(1)三条边对应的三面均为透光面，作为一种光学透射结构。通常利用两个侧面的折射光路用作为分光镜，或利用反射、全反射、折射光路作为反光镜，也可利用两个侧面折射向上的光路作为聚光镜，甚至是利用两个侧面结合特殊90°顶角作为回光镜。
(2)至少一条以上的边对应的面为反射面，作为一种光学反射结构。通常可利用多个三棱镜组合，利用其反射面来构成多次反射光路，作为导光镜，典型的如水下潜望、户外光线采集传导等应用。
针对反光用的三棱镜结构，中国专利申请200420034925.X(2004年1月14日)公开了一种模拟窗式自然光采集及传导装置，中国专利申请201420617918.6(2014年10月24日)公开了一种单摄像头全景记录装置，中国专利申请200910079162.8(2009年3月3日)公开了一种镜像立体摄像设备及方法。
然而，无论上述何种专利，反光用的三棱镜结构均为传统三棱镜结构，其截面三边形的所有边均为直线，或者说，其任意侧面均为一种标准平面，该种结构也只能完成简单的光路反射，当平行光源入射时是无法打破出射光 的平行度的，更不用说对其修饰后使其满足特定光路反射规律(例如抬高或降低平均反射方向，便于其他关联部件完成对反射光的收集、再次反射、再次透射等要求，或是纯粹的光线扰乱或光线收敛)，从而导致了传统三棱镜结构的应用局限性。
现有背板组件用反光贴条采用普通的三棱镜结构，不能改变平行反射光路。
因此，针对上述问题，有必要提出进一步的解决方案。
发明内容
为了解决现有背板组件用反光贴条不能改变平行反射光路的问题，本发明提供一种能够改变平行反射光路的背板组件用反光贴条及其制备方法。该背板组件用反光贴条采用凹弧面三棱镜结构，能够改变平行反射光路，使反射光路产生偏转角，将直线光源修饰为非平行光路，用于平行光路修饰。本发明还解决了传统反光三棱镜结构，在直线光源的平行光路入射到其反射面时，无法改变其平行反射光路的问题。本发明还提供一种用于平行光路修饰的三棱镜结构及其制备方法、及一种三棱镜阵列。该三棱镜结构的反光面为凹弧面，可将直线光源修饰为非平行光路，使反射光路产生偏转角。
为了解决上述技术问题，本发明采用下述技术方案：
本发明提供一种背板组件用反光贴条，所述背板组件用反光贴条包括三棱镜阵列，所述三棱镜阵列包括结构层和底材层，所述结构层置于底材层上，所述结构层包括若干三棱镜结构(简称三棱镜)，所述三棱镜结构的横截面为三角形，所述三角形的至少一个侧边为向三角形内凹的弧形，所述三棱镜结构的至少一个侧面为凹弧面，所述凹弧面为反光面。
进一步的，所述背板组件用反光贴条包括热熔贴合层和三棱镜阵列，所述热熔贴合层置于三棱镜阵列的底材层之下。
本发明还提供一种背板组件用反光贴条，所述背板组件用反光贴条包括 热熔贴合层和三棱镜阵列(也称为三棱镜结构阵列)，所述三棱镜阵列包括结构层和底材层，所述结构层置于底材层上，所述结构层包括若干三棱镜结构，所述三棱镜结构的横截面为三角形，所述三角形的两个侧边为向三角形内凹的弧形，所述三棱镜结构的两个侧面为凹弧面，所述凹弧面为反光面；所述热熔贴合层置于三棱镜阵列的底材层之下。
进一步的，所述三棱镜结构覆盖了底材层的表面。
进一步的，在所述背板组件用反光贴条中，所述三棱镜结构的两个侧面包括左侧反射面和右侧反射面，所述左侧反射面和右侧反射面为凹弧面。
所述结构层横截面(三角形)的左侧反射面为凹圆弧，所在弦的方向角α 2，对应圆心角为θ a，右侧反射面为凹圆弧，所在弦的方向角β 2，对应圆心角为θ b。
进一步的，所述的三棱镜结构的纵向延伸方向与底材边缘延伸方向形成45度的夹角。
进一步的，所述底材层的材质选自可以成膜的高分子材料；所述结构层的材质选自可以成型的高分子材料或与底材层相同的材料。
进一步的，所述底材层厚度为0.012～0.3mm，依据需要进行选择。
进一步的，所述热熔贴合层为包含一层热熔胶膜，如EVA，或PVC等，加热表现出粘性，可用于热贴合。
进一步的，所述热熔贴合层(热熔胶膜)厚度为0.01～0.1mm，优选为0.02～0.05mm。
本发明还提供一种所述的反光贴条的制备方法，所述方法包含下述步骤：
(1)在特定互补结构的模具中填充紫外光固化或热固化高分子材料，利用光固化、热固化工艺成型，脱模后形成特定的三棱镜阵列，制得含底材层和结构层的半成品A；
(2)将半成品A的结构层进行反光处理，制得含弧面反光三棱镜阵列的反光膜半成品B；
(3)将半成品B的底材层背面进行热熔贴合层处理(背胶处理)，可采用热熔胶淋涂的方式，产生半成品C。
(4)将半成品C进行分条，收卷，最终形成反光贴条。
该反光贴条可用于光伏组件上，通过焊带的余温将其热熔贴于焊带之上(如图12所示)，可将该区域原本无法利用的太阳光通过光的重定向进行回收利用，提高了组件的功率。由于结构和分条方向具有45度的夹角(如图13所示)，因而同时适用于横装或竖装的组件。
由于太阳从早上升起至傍晚落下的过程中，光照角度是在不停变换的，因而与现有技术相比，该弧边结构的反光贴条可以更好的适应不同角度的太阳光的反射，并将其重定向并通过玻片全反射进行回收利用。
本发明还提供一种三棱镜结构，所述三棱镜结构的横截面为三角形，所述三角形的两个侧边为向三角形内凹的弧形，所述三棱镜的两个侧面为凹弧面，所述凹弧面为反光面。
上述三棱镜结构的凹弧面为反光面，也称为凹弧面反光三棱镜结构。
凹弧面反光三棱镜结构能够渐变地修饰光路，也可称为一种光路可渐变修饰的凹弧面反光三棱镜结构。
进一步的，在所述三棱镜结构中，所述三角形的左侧弧边，圆弧所在圆心角为θ a，所在弦的方向角为α 2；所述三角形的右侧弧边，圆弧所在圆心角为θ b，所在弦的方向角为β 2，所述三角形的高为H；α 2与β 2均为锐角。
通过H、α 2和θ a即可确定三角形左半部形状；通过H、β 2和θ b即可确定三角形右半部形状。
H即是三棱镜结构的高度，H的范围是10 -2～10 2mm，根据实际应用选择，不作优选。三棱镜结构的高度H可以选择10 -2～1mm，1～10 2mm，0.1mm，或10mm。
所述三棱镜结构只定义形状，不定义大小，大小变化满足相似原则。
进一步的，在所述三棱镜结构中，所述三角形的左侧弧边与右侧弧边相 互对称，α 2＝β 2，且θ a＝θ b。
进一步的，在所述三棱镜结构中，所述三角形的左侧弧边与右侧弧边不对称，α 2≠β 2或θ a≠θ b。
进一步的，在所述三棱镜结构中，α 2与β 2的范围分别为15°～75°。
进一步的，α 2与β 2的范围分别优选为30°～60°。进一步地，α 2与β 2分别优选为45°。θ a与θ b均为锐角，范围为0.5°～45°，优选为5°～20°，进一步地，优选为10°。
进一步的，所述三棱镜结构的侧面进行了反光处理形成反光面。
所述三棱镜表面的反光处理为利用任何化学、物理过程在表面产生反光面的方法，包括结构层上进行金属镀膜、高分子涂料涂覆，也可结构层材质本身直接打磨抛光或压延成型。
进一步的，所述三棱镜结构的凹弧面上设置有反射层。
反射层也称为反射面。反射面即反光面。
进一步的，所述反射层的材质选自金属镀层、或高分子涂层、或与结构层相同的材质。
所述反射层的形状为凹弧面。所述反射层为反光面。
进一步的，所述三棱镜结构还包括底材层，所述底材层紧贴于三棱镜的底面。
进一步的，在三棱镜阵列中，所述底材层的厚度T＝0.1～10H，T优选为1H。
进一步的，所述结构层的材质选自高分子材料、金属材料或非金属材料中的一种或至少两种的组合；所述底材层的材质选自高分子材料或与结构层相同的材料。
当平行光线入射到上述三棱镜结构的反光弧面上后，会打破原有平行度，导致反射光线之间产生偏转角。
本发明提供的三棱镜结构可将直线光源的平行光路通过反射修饰为非平 行光路，修饰效果用以满足特定光路反射规律(例如抬高或降低平均反射方向，便于其他关联部件完成对反射光的收集、再次反射、再次透射等要求，或是纯粹的光线扰乱或光线收敛)，从而打破了传统反光三棱镜结构的应用局限。
与现有技术相比，本发明所提供的三棱镜结构及三棱镜阵列，具有下述特点：可将直线光源通过弧形反射面修饰为非平行光路，使反射光路产生偏转角。可用于需要扰乱直线光路或控制其出射光角度符合特定偏转角的场合。
与现有背板组件用反光贴条相比，本发明提供的背板组件用反光贴条采用凹弧面三棱镜结构，能够改变平行反射光路，使反射光路产生偏转角，将直线光源修饰为非平行光路，用于平行光路修饰。该弧边结构的反光贴条可以更好的适应不同角度的太阳光的反射，并将其重定向并通过玻片全反射进行回收利用。
附图说明
图1为微元反射界面上的光路方向角分析图；
图2为传统反光三棱镜结构的横截面上左半部入射的光路图；
图3为凹弧面反光三棱镜结构的横截面上左半部入射的光路图；
图4为一个完整传统反光三棱镜结构；
图5为含有底材的传统反光三棱镜结构阵列；
图6为本发明提供的三棱镜结构；
图7为本发明提供的三棱镜阵列；
图8为底材和结构层两层同材质的三棱镜阵列；
图9为底材和结构层、反射面三层同材质的三棱镜阵列；
图10圆弧的半径、对称出射光焦点、焦点到弦距离、弦长的数值关系；
图11反光贴条结构示意图；
图12反光贴条的贴合示意图；
图13反光贴条在光伏组件上的应用示意图。
其中：
01：水平方向
02：微元反射界面(任何曲线均可采用微元法分解)
020：02的法线
021：02上的入射光
022：021的对应反射光
023：021的延伸方向射线
03：传统反光三棱镜结构的横截面
04：凹弧面反光三棱镜结构的横截面
05：03或04的左侧反射界面
06：03或04的右侧反射界面
07：平行入射光源
08：07的反向射线
09：传统反光三棱镜结构(阵列)
091：09的结构层
092：09的左侧反光面
093：09的右侧反光面
094：09的底材层
10：凹弧面反光三棱镜结构(一个或阵列)
101：10的结构层
102：10的左侧反光面
103：10的右侧面
104：10的底材层
13：侧边圆弧的曲率半径R
14：关于圆弧对称的出射光路的焦点
15：焦点到圆弧弦的距离D
16：圆弧弦长L
50：05任意位置的切线
500：50的法线
501：50和500交点处的入射光
502：501的对应反射光
51：05的下切线
510：51的法线
511：51和510交点处的入射光
512：511的对应反射光
53：05的上切线
530：53的法线
531：53和530交点处的入射光
532：531的对应反射光
17：反光贴条
18：热熔贴合层
181：热熔胶
19：贴合后的反光贴条
20：焊带
21：硅片(贴反光条前)
22：硅片(贴反光条后)
23：热熔贴合过程
24：贴条局部放大
25：反光贴条结构层三棱镜结构的纵向延伸方向
26：反光贴条底材边缘延伸方向(同分条方向)
具体实施方式
为了更易理解本发明的结构及所能达成的功能特征和优点，下文将本发明的较佳的实施例，并配合图式做详细说明如下。
当光线入射到不规则反射面上时，入射位置该点的切线以及与该切线垂直的法线，基于入射光与反射光在反射平面上关于法线对称，即可确定完整反射光路。
图1所示为微元反射界面上的光路方向角分析图，以左侧为例，微元反射界面02视为直线，其方向角为α 0，那么法线09的方向角必然为90°+α 0，若一般平行入射光源07的方向角为
Figure PCTCN2019079422-appb-000001
那么其反向射线的方向角(等同于所在直线的方向角)为其逆时针旋转180°，为
Figure PCTCN2019079422-appb-000002
则法线与入射光反向射线的偏转角(前者-后者)为
Figure PCTCN2019079422-appb-000003
根据对称原则，入射光反向射线与出射光关于法线完全对称，那么出射光与法线的偏转角(前者-后者)也为
Figure PCTCN2019079422-appb-000004
因此
Figure PCTCN2019079422-appb-000005
Figure PCTCN2019079422-appb-000006
为了后续的示意图更加清晰，以左侧部分为例，将仅标注平行光源的反向射线的方向角
Figure PCTCN2019079422-appb-000007
以及不同入射位置的切线的方向角α n(n＝0,1,2,3…)，其余的入射光、法线、反射光的方向角均由
Figure PCTCN2019079422-appb-000008
与α n确定，因此无需标注：首先，对于平行光源而言，即便位置不同，所有入射光的角度均相同，同为
Figure PCTCN2019079422-appb-000009
其次，根据不同位置切线的角度α n，可直接计算相应法线的角度必定为90°+α n；最后，通过对称原理，可直接计算反射光的角度必定为
Figure PCTCN2019079422-appb-000010
图2所示为传统反光三棱镜结构的横截面上左半部入射的光路图，平行入射光源07的方向角为
Figure PCTCN2019079422-appb-000011
其反向射线08的方向角为
Figure PCTCN2019079422-appb-000012
左侧反射界面05的方向角为α 0，则05上任意位置的切线50的方向角也为α 0(50与05重合，因此图中省略标注)，其法线500在极坐标中的方向角为90°+α 0，当入射光501射到反射界面05的任意位置时，501的对应反射光503的方向角均为
Figure PCTCN2019079422-appb-000013
可以发现，所有出射光线始终平行，其
Figure PCTCN2019079422-appb-000014
Figure PCTCN2019079422-appb-000015
γ a与
Figure PCTCN2019079422-appb-000016
和α 0无关。特别的，当采用垂直入射光源时，
Figure PCTCN2019079422-appb-000017
反射光的方向角均为180°-90°+2α 0＝90°+2α 0，所有出射光线仍始终平行，其最大偏转角γ a＝(90°+2α 0)-(90°+2α 0)＝0，仍与
Figure PCTCN2019079422-appb-000018
和α 0无关。
图3所示为凹弧面反光三棱镜结构的横截面上左半部入射的光路图，平行入射光源07的方向角为
Figure PCTCN2019079422-appb-000019
其反向射线08的方向角为
Figure PCTCN2019079422-appb-000020
定义凹圆弧的上下端点所在的切线称为上下切线，左侧反射界面05所在的下切线51的方向角为α 1，法线510的方向角为90°+α 1，上切线53的方向角为α 3，法线530的方向角为90°+α 3，而中间区域任意位置所在切线50的方向角为α 0，法线500的方向角为90°+α 0。当下端点处的入射光511入射到圆弧下切点时，其对应反射光513的方向角为
Figure PCTCN2019079422-appb-000021
当上端点处的入射光531入射到圆弧上切点时，其对应反射光533的方向角为
Figure PCTCN2019079422-appb-000022
而当中间区域垂直入射光501入射到圆弧中间区域时，其对应反射光503的方向角为
Figure PCTCN2019079422-appb-000023
显然
Figure PCTCN2019079422-appb-000024
介于
Figure PCTCN2019079422-appb-000025
与
Figure PCTCN2019079422-appb-000026
之间。容易发现，不同位置入射的反射光已经无法保持互相平行，其
Figure PCTCN2019079422-appb-000027
Figure PCTCN2019079422-appb-000028
即γ a仅与θ a有关，与
Figure PCTCN2019079422-appb-000029
和α n均无关。特别的，当采用垂直入射光源时，
Figure PCTCN2019079422-appb-000030
反射光的最小方向角为90°+2α 1，最大方向角为90°+2α 3，最大偏转角γ a＝(90°+2α 3)-(90°+2α 1)＝2(α 3-α 1)＝2θ a，即γ a仍然仅与θ a有关，与
Figure PCTCN2019079422-appb-000031
和α n均无关。
三棱镜结构中，如图4和图5所示，三棱镜的横截面的左侧边与水平线的夹角为α 2，α 2称为左侧边的方向角。三棱镜的横截面的右侧边与水平线的夹角为β 2，β 2称为右侧边的方向角。H为三棱镜结构的横截面中的三角形的高度。H也是结构层的高度。
如图6、图7、图8和图9所示，在凹弧面反光三棱镜结构中，横截面中，三棱镜左侧凹圆弧所在弦与水平线的夹角为α 2，左侧凹圆弧对应圆心角为θ a，α 2称为左侧弦的方向角。三棱镜的横截面的凹圆弧所在弦与水平线的夹角为 β 2，β 2称为右侧弦的方向角。H为三棱镜结构的横截面中的三角形的高度。H也是结构层的高度。
本发明所述凹弧面反光三棱镜结构中，其中结构层(三棱镜)的可选高度H为10 -2～10 2mm，可根据实际光学器件大小和使用场合选择，H为10 -2～1mm较适合应用在微结构光学器件，H为1～10 2mm较适合应用在普通光学器件。
结构层的可选材质为高分子材料、金属材料、无机非金属材料等：高分子材料可选通用塑料、工程塑料、一般塑料、橡胶、高分子涂料等，一般做结构件优选为工程塑料、一般塑料和高分子涂料(固化后)，考虑到成本、易制性、表面易处理性，微结构件优选高分子涂料，尤其是方便光固化转印微结构成型的丙烯酸类树脂(PMMA)，一般结构件则优选聚碳酸酯(PC)和有机玻璃(PMMA)；金属材料可选黑色金属、有色金属、特种金属和合金等，做一般结构件优选为成本较低的不锈钢、铝合金，做微结构件则采用延展性较好的铝箔、铜箔、锡箔等压延；无机非金属材料可选玻璃类、陶瓷类，不论一般结构件还是微观结构件均优选玻璃(SiO 2为主体成分)，且均需通过精密切割进行加工。
底材层的材质可选为同结构层的材质，配合采用一次成型工艺(注塑、浇铸、压延、精密切割等)；也可以选择不同于结构层的材质，配合采用二次成型工艺(复合、转印等)。其中不同于结构层的材质优选高分子材料，如聚对苯二甲酸乙二醇酯(PET)、聚对苯二甲酸丁二醇酯(PBT)、聚碳酸酯(PC)、聚甲基丙烯酸甲酯(PMMA)、聚苯乙烯(PS)、聚丙烯(PP)、聚乙烯(PE)中的一种，优选通用性高、成本较低、热稳定性好且易做表面处理的PET。
反射层(也称为反射面)的材质可选为金属镀层、高分子材料涂层，不论一般结构件还是微观结构件均可以选择金属镀层，镀层材料可选银、铝等，出于成本，除非对反射率高要求会选择镀银，否则选择镀铝即可；一般结构件还可以选择高分子材料涂层，涂层颜料优选TiO 2(做白反射的常用材料)；高分子涂层的平整度没有金属镀层精度高，会产生一定比例漫反射，因此高反 射精度要求的结构器件尤其是微观结构器件均优先选择金属镀层。
热熔胶的材质可选为热塑型高分子胶系，如聚乙烯、聚丙烯、聚氯乙烯(PVC)、乙烯-醋酸乙烯酯共聚物(EVA)、聚苯乙烯体系、聚酰胺体系、聚碳酸酯体系、聚甲醛、热塑性聚酯、聚苯醚、聚苯硫醚、聚砜、聚酮类、或聚苯酯等，一般优选为较为通用的EVA、或PVC等。
下述所有实施例和对比例中：当结构层高度H在1～10 2mm时均优选没有底材层，结构层材质优选为SiO 2、PMMA、PC、不锈钢、铝合金，反射层材质优选为Al、Ag、TiO 2；当结构层高度H在10 -2～1mm时均优选有底材层，材质优选为PET，结构层材质优选为PMMA，反射层材质优选为Al、Ag，底材层的厚度T可选为0.1～10H，优选为1H。
对比例1
如图4所示，用于对比的一个完整传统反光三棱镜结构09，包含结构层091，反射面092，结构层横截面03，左侧反射界面05为直线，方向角α 2为30°，右侧反射界面06，方向角β 2为30°，其中结构层高度H为10mm，结构层材质为SiO 2，反射面材质为Al。
对比例2
如图5所示，用于对比的含有底材的传统反光三棱镜结构阵列09，包含结构层091，反射面092，底材层093，结构层横截面03，左侧反射界面05为直线，方向角α 2为30°，右侧反射界面06为直线，方向角β 2为30°，其中结构层高度H为0.1mm，结构层材质为PMMA，底材层厚度T为结构层高度H的1倍，即0.1mm，材质为PET，反射面材质为Al。
实施例1
如图6所示，本发明提供的整个凹弧面反光三棱镜结构10，包含结构层101，左侧反射面102，右侧反射面103，结构层横截面04，左侧反射界面05为凹圆弧，所在弦的方向角α 2为15°，对应圆心角为θ a为10°，右侧反射界面06为凹圆弧，所在弦的方向角β 2为15°，对应圆心角为θ b为10°，其中结构层 高度H为10mm，结构层材质为SiO 2，左侧反射面材质为Al，右侧反射面材质为Al。
实施例2
如实施例1提供的整个凹弧面反光三棱镜结构，所述左侧反射界面05中，弦的方向角α 2为30°，右侧反射界面06中，弦的方向角β 2为30°。
实施例3-22
如实施例2提供的整个凹弧面反光三棱镜结构，所述左侧反射界面05中，弦的方向角α 2、对应圆心角为θ a，右侧反射界面06中，弦的方向角β 2、对应圆心角为θ b，结构层高度H、结构层材质、左或右侧反射面材质均参照表3。
实施例23
如图7所示，本发明提供的凹弧面反光三棱镜结构阵列10，包含结构层101，左侧反射面102，右侧反射面103，底材层104，结构层横截面04，左侧反射界面05为凹圆弧，所在弦的方向角α 2为15°，对应圆心角为θ a为10°，右侧反射界面06为凹圆弧，所在弦的方向角β 2为15°，对应圆心角为θ b为10°，其中结构层高度H为0.1mm，底材层厚度T＝1H，结构层材质为PMMA，左侧反射面材质为Al，右侧反射面材质为Al，底材层材质为PET。
实施例24
如实施例23提供的凹弧面反光三棱镜结构阵列，所述左侧反射界面05中，弦的方向角α 2为30°，右侧反射界面06中，弦的方向角β 2为30°。
实施例25-37、44-45
如实施例23提供的凹弧面反光三棱镜结构阵列，所述左侧反射界面05中，弦的方向角α 2、对应圆心角为θ a，右侧反射界面06中，弦的方向角β 2、对应圆心角为θ b，结构层高度H、底材层厚度T、结构层材质、左或右侧反射面材质、底材层材质均参照表4。
实施例38
如图8所示，本发明提供的凹弧面反光三棱镜结构阵列10，包含结构层 101，左侧反射面102，右侧反射面103，底材层104，结构层横截面04，左侧反射界面05为凹圆弧，所在弦的方向角α 2为45°，对应圆心角为θ a为10°，右侧反射界面06为凹圆弧，所在弦的方向角β 2为45°，对应圆心角为θ b为10°，其中结构层高度H为0.1mm，底材层厚度T＝1H，结构层材质为PMMA，左侧反射面材质为Al，右侧反射面材质为Al，底材层材质为PMMA。
实施例39
如实施例38提供的凹弧面反光三棱镜结构阵列，所述结构层材质为PC，底材层材质为PC。
实施例40
如实施例38提供的凹弧面反光三棱镜结构阵列，所述结构层材质为SiO 2，底材层材质为SiO 2。
实施例41
如图8所示，本发明提供的凹弧面反光三棱镜结构阵列10，包含结构层101，左侧反射面102，右侧反射面103，底材层104，结构层横截面04，左侧反射界面05为凹圆弧，所在弦的方向角α 2为45°，对应圆心角为θ a为10°，右侧反射界面06为凹圆弧，所在弦的方向角β 2为45°，对应圆心角为θ b为10°，其中结构层高度H为0.1mm，底材层厚度T＝1H，结构层材质、左侧或反射面材质以及底材层材质均为Al。
实施例42
如实施例38提供的凹弧面反光三棱镜结构阵列，所述结构层材质、反射面材质以及底材层材质均为Sn。如图9所示。
实施例43
如实施例38提供的凹弧面反光三棱镜结构阵列，所述结构层材质、反射面材质以及底材层材质均为Cu。如图9所示。
实施例46
如图11所示，本发明提供的反光贴条17，包括热熔贴合层18和三棱镜 阵列，三棱镜阵列包括结构层101和底材层104；结构层101包括若干三棱镜结构，所述三棱镜结构包括左侧反射面102，和右侧反射面103，其中结构层为凹弧面反光三棱镜结构阵列，热熔贴合层18包括热熔胶181。结构层横截面04，左侧反射界面05为凹圆弧，所在弦的方向角α 2为15°，对应圆心角为θ a，θ a为10°，右侧反射界面06为凹圆弧，所在弦的方向角β 2为15°，对应圆心角为θ b，θ b为10°，其中结构层高度H为0.1mm，底材层厚度T为0.1mm，热熔贴合层18厚度为0.05mm，结构层材质为PMMA，左侧反射面材质为Al，右侧反射面材质为Al，底材层材质为PET，热熔胶材质为EVA。
实施例47
如实施例46提供的反光贴条，所述底材层厚度为0.012mm。如图11所示。
实施例48
如实施例46提供的反光贴条，所述底材层厚度为0.3mm。如图11所示。
实施例49
如实施例46提供的反光贴条，所述底材层厚度为0.012mm。如图11所示。
实施例50
如实施例46提供的反光贴条，所述热熔胶(热熔贴合层)厚度为0.01mm。如图11所示。
实施例51
如实施例46提供的反光贴条，所述热熔胶厚度为0.1mm。如图11所示。
实施例52
如实施例46提供的反光贴条，所述底材层材质为聚碳酸酯。如图11所示。
实施例53
如实施例46提供的反光贴条，所述热熔胶材质为PVC。如图11所示。
如实施例46提供的贴合型反光膜，所述结构层的不同结构参数保护范围，参考实施例23-45，在此不再赘述。
按照下述方式评价本发明提供的光路可渐变修饰的三棱镜结构或三棱镜阵列的主要性能。
(A)光路修饰效果
采用平行光源入射后其反射光的最大偏转角γ a/γ b的大小来评估光路修饰效果，越大修饰效果越显著。也可以用圆弧对应的圆心角θ a/θ b的大小来评估，如表1所示。表1中θ a/θ b＝5°、10°、20°、30°、45°、60°时(0.5°略)，关于侧边圆弧的曲率半径13、关于圆弧对称的出射光焦点14、焦点到弦的距离15、弦长16及其数值关系如图10所示(曲率半径R用100个单位表示)。
采用γ a/γ b的评价等级：极弱(0°,1°)<弱[1°,10°)<较弱[10°,20°)<适中[20°,40°)<较强[40°,60°)<强[60°,90°]<极强(90°,120°)。
相应采用θ a/θ b的评价等级：极弱(0°,0.5°)<弱[0.5°,5°)<较弱[5°,10°)<适中[10°,20°)<较强[20°,30°)<强[30°,45°]<极强(45°,60°)。
注：表示取值范围时圆括号“(”或“)”表示不包含端值，方括号“[”或“]”表示包含端值
值得注意的是，θ a/θ b不是越大越好，越大时其适用性会大大降低：以左侧参数为例，由于α 3＝α 2+0.5θ a，α 1＝α 2-0.5θ a，因此当α 2比较大时(如60～75°)或α 2比较小时(如15～30°)，若θ a较大(30～60°)，越容易导致α 1<0°或α 3>90°，非锐角导致无法形成三棱镜结构。
因此本文建议θ a/θ b范围在修饰效果最终保持在弱～强之间选择，即0.5～45°，优选范围较弱～合适，即5～20°，因偏下限范围普适性相对更好，而在适中范围内更偏下限优选10°为最佳值。
表1光路修饰效果的评价等级和关联参数对应表
Figure PCTCN2019079422-appb-000032
注：0°时为无限远，即不交汇，0～0.5°即“接近无限远”。“结构内”表示焦点距离过近，0.5倍弦长以内。L＝2R×cos(90-θ a/2)D＝0.5L×Sin(90-θa)
(B)光学处理的灵敏度和精度之间的平衡
采用三棱镜结构凹凸或侧面圆弧弦的方向角(同平均方向角)来评价灵敏度和精度，当灵敏度和精度等级相同时视为平衡，等级差1～2级时视为不平衡，等级差3～4级时视为极不平衡，如表2所示。
在方向角变小时，反射光和入射光错开角度越小，即方向角越小时灵敏度越低，反之亦反，即方向角越高时灵敏度越高。因此如表2所示，灵敏度评价等级从低到高为：
1(0°～20°)<2(20°～40°)<3(40°～50°)<4(50°～70°)<5(70°～90°)。
在方向角变小时，单位投影面积变大，从入射(从远处入射可近似垂直入射)和反射的光线数量较多，即方向角越低时精度越高，反之亦反，即方向角越高时精度越低。因此如表2所示，精度评价等级从高到低为：
5(0°～20°)>4(20°～40°)>3(40°～50°)>2(50°～70°)>1(70°～90°)。
表2灵敏度和精度的平衡关系评价表
Figure PCTCN2019079422-appb-000033
(C)加工难度
从结构层的尖锐程度、侧边凹陷程度大小以及结构层大小来综合评估加工难度。
结构层的尖锐程度受到弦的方向角α 2或β 2影响，α 2或β 2越小越平坦，α 2或β 2越大越尖锐。平坦的结构容易加工，不容易损坏；而尖锐的结构正好相反，难加工，也容易损坏。
结构层的侧边弯曲程度受到θ a或θ b影响，θ a或θ b越小弧面越直，越大弧面越弯。越直的弧面越容易加工，宏观结构件更易脱模、切割、打磨、抛光，微观结构件更易填充、脱模、压延。而越弯的弧面则越难加工，宏观结构件更难脱模、切割、打磨、抛光，微观结构件更难填充、脱模、压延。
结构层的尺寸大小受到高度H的影响，H越大，结构层越大，反之亦反。而尺寸大小可以同时放大或缩小所有加工难度，由于宏观结构件和微观结构件的加工方式确定后，其加工精度也就确定，相同加工精度下，尺寸越大难度越低，尺寸越小难度越大。一般的，当H属于10 -2～1mm时，属于微观加工范畴，当H越接近10 -2mm时，加工越难，当H越接近1mm时，加工越简单；一般的，在H属于1～10 2mm时，属于宏观加工范畴，当H越接近1mm时，加工越难，当H越接近10 2mm时，加工越简单；
表3三棱镜结构的实施例1-22、对比例1的性能对比
Figure PCTCN2019079422-appb-000034
Figure PCTCN2019079422-appb-000035
注：表中“/”代表“或”的意思。
如表3所示，本发明的实施例都对平行光源的出射光路修饰起到了一定的效果，突破了传统反光三棱镜的功能局限：(a)，通过实施例1-22的对比可以发现，当侧边圆弧弦的方向角α 2或β 2在优选范围15～75°取端值15°或75°时，光学处理的灵敏度和精度极不平衡，且75°时结构层太尖锐，加工难度高，在进一步优选范围30～60°取端值30°或60°时，光学处理的灵敏度和精度仍不平衡，且60°时结构层仍较尖锐，加工难度仍较高，仍不是最佳，最终进一步的优选值为45°的实施例3最佳，光学处理平衡且加工难度适中；(b)，通过实施例3和实施例6-9的对比可以发现，当侧边圆弧对应圆心角θ a或θ b在优选范围0.5～45°取端值0.5°或45°时，要么0.5°光学修饰效果弱，要么45°侧边太弯导致加工难度高，进一步优选范围5～20°取端值5°或20°时，要么5°光学修饰效果仍较弱，要么20°侧边太弯导致加工难度仍较高，仍不是最佳，最终进一步的优选值为10°的实施例3最佳，光学修饰效果适中且加工难度也适中；(c)，通过实施例3和10、11的对比可以发现，当结构高度H在宏观尺度的优选范围1～10 2mm时，取端值10 0mm、中间值(指数中间值)10 1mm、端值10 2mm时，随着H增加尺寸大小引起的加工难度变低，需要依据整个器件要求配套选择合适尺寸，一般该尺度的结构件常优选10mm，加工难度也适中；(d)，通过实施例3、12-19的对比可以发现，结构层和反射面的材质并没有影响光学性能和加工难度，可以根据实际需要，采用不同结构大小，搭配选择SiO 2、PMMA、PC、不锈钢、铝合金等材质的结构层，以及Al、Ag、TiO 2的反射面；应当理解，更多材质搭配的实施例，在本文中虽不再列举，但不影响本发明 的保护范围。(e)，表3中还列举了实施例20、21、22，所述整个凹弧面反光结构还是左右不对称的，分别采用三个不对称元素即三边形形状(α 2≠β 2)、不对称侧边圆弧曲率(θ a≠θ b)以及差异化反射面材质(左Al右Ag)来实现。应当理解，左右不对称的实施例还可以同时采用两种或三种不对称元素互相搭配，单一不对称元素的相关参数还有更多的选择，左右反射面也仍有更多材质搭配，在本文中虽不再列举，但不影响本发明的保护范围。
表4反光三棱镜结构阵列的实施例23-45、对比例2的性能对比
Figure PCTCN2019079422-appb-000036
Figure PCTCN2019079422-appb-000037
注：因表格空间有限，底材厚度T在表格中无法表示，其他实施例均为1H，唯实施例34、35不同，分别为10H和0.1H。其中实施例34底材较厚，额外成本太高，实施例35底材太薄，成型难度太大。
如表4所示，本发明的实施例都对平行光源的出射光路修饰起到了一定的效果，突破了传统反光三棱镜阵列的功能局限：(a)，通过实施例23～27的对比可以发现，当侧边圆弧弦的方向角α 2或β 2在优选范围15～75°取端值15°或75°时，光学处理的灵敏度和精度极不平衡，且75°时结构层太尖锐，加工难度高，在进一步优选范围30～60°取端值30°或60°时，光学处理的灵敏度和精度仍不平衡，且60°时结构层仍较尖锐，加工难度仍较高，仍不是最佳，最终进一步的优选值为45°的实施例25最佳，光学处理平衡且加工难度适中，因此，α 2与β 2可选范围为15°～75°，优选为30°～60°，进一步地，优选为45°；(b)，通过实施例25和28-31的对比可以发现，当侧边圆弧对应圆心角θ a或θ b在优选范围0.5～45°取端值0.5°或45°时，要么0.5°光学修饰效果弱，要么45°侧边太弯导致加工难度高，进一步优选范围5～20°取端值5°或20°时，要么5°光学修饰效果仍较弱，要么20°侧边太弯导致加工难度仍较高，仍不是最佳，最终进一步的优选值为10°的实施例25最佳，光学修饰效果适中且加工难度也适中，因此，θ a与θ b可选范围为0.5°～45°，优选为5°～20°，进一步地，优选 为10°。；(c)，通过实施例25和32、33的对比可以发现，当结构高度H在微观尺度的优选范围10 -2～1mm时，取端值10 -2mm、中间值(指数中间值)10 -1mm、端值10 0mm时，随着H增加尺寸大小引起的加工难度变低，需要依据整个器件要求配套选择合适尺寸，一般该尺度的结构件常优选0.1mm，加工难度也适中；(d)，通过实施例25和34、35的对比可以发现，底材厚度T的可选范围为10～0.1H，取端值10H、中间值1H、端值0.1H时，随着T的增加，额外成本增多，随着T的减小，成型难度增加，一般优选T＝1H比较合适；(e)，通过实施例25、36-43的对比可以发现，结构层、反射面和底材的材质并没有影响光学性能和加工难度，可以根据实际需要，采用不同工艺选择各种搭配，如实施例25、36、37采用复合或UV转印工艺时可选择不同底材，如实施例38、39采用热压复合工艺时可选择底材层和结构层同材质，如实施例41-43采用金属箔片压延工艺时可选择底材层、结构层、反射面同材质，如实施例30采用微雕工艺时可选择SiO 2材质，雕出结构层的同时自然会留出底材层。应当理解，更多材质搭配的实施例，在本文中虽不再列举，但不影响本发明的保护范围；(f)，表4中还列举了2个实施例44、45，所述凹弧面反光结构左右不对称的，分别采用两种个不对称元素即三边形形状(α 2≠β 2)、不对称侧边圆弧曲率(θ a≠θ b)，应当理解，左右不对称的实施例还可以同时采用两种不对称元素互相搭配，单一不对称元素的相关参数还有更多的选择，在本文中虽不再列举，但不影响本发明的保护范围。
应当注意，以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。凡是根据本发明内容所做的均等变化与修饰，均涵盖在本发明的专利范围内。

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  1. 一种背板组件用反光贴条，其特征在于，所述背板组件用反光贴条包括热熔贴合层和三棱镜阵列；所述三棱镜阵列包括结构层和底材层，所述结构层置于底材层上，所述结构层包括若干三棱镜结构，所述三棱镜结构的横截面为三角形，所述三角形的至少一个侧边为向三角形内凹的弧形，所述三棱镜结构的至少一个侧面为凹弧面，所述凹弧面为反光面；所述热熔贴合层置于三棱镜阵列的底材层之下。
  2. 根据权利要求书1所述背板组件用反光贴条，其特征在于，所述热熔贴合层为包含一层热熔胶膜。
  3. 根据权利要求书1所述背板组件用反光贴条，其特征在于，所述背板组件用反光贴条包括热熔贴合层和三棱镜阵列，所述三棱镜阵列包括结构层和底材层，所述结构层置于底材层上，所述结构层包括若干三棱镜结构，所述三棱镜结构的横截面为三角形，所述三角形的两个侧边为向三角形内凹的弧形，所述三棱镜结构的两个侧面为凹弧面，所述凹弧面为反光面；所述热熔贴合层置于三棱镜阵列的底材层之下。
  4. 根据权利要求书1所述背板组件用反光贴条，其特征在于，所述三棱镜结构覆盖了底材层的表面。
  5. 根据权利要求书3所述背板组件用反光贴条，其特征在于，所述三棱镜结构的两个侧面包括左侧反射面和右侧反射面，所述左侧反射面和右侧反射面为凹弧面。
  6. 根据权利要求书5所述背板组件用反光贴条，其特征在于，所述的三棱镜结构的纵向延伸方向与底材边缘延伸方向形成45度的夹角。
  7. 根据权利要求书1所述背板组件用反光贴条，其特征在于，所述三角形的左侧弧边，圆弧所在圆心角为θ a，所在弦的方向角为α 2；所述三角形的右侧弧边，圆弧所在圆心角为θ b，所在弦的方向角为β 2，所述三角形的高为H；α 2与β 2均为锐角。
  8. 根据权利要求书7所述背板组件用反光贴条，其特征在于，α 2与β 2的范围分别为15°～75°。
  9. 根据权利要求书1所述背板组件用反光贴条，其特征在于，所述三棱镜结构的凹弧面上设置有反射层。
  10. 一种根据权利要求1-9中任一项所述的背板组件用反光贴条的制备方法，其特征在于，所述方法包含下述步骤：
    (1)在特定互补结构的模具中填充紫外光固化或热固化高分子材料，利用光固化、热固化工艺成型，脱模后形成特定的三棱镜阵列，制得含底材层和结构层的半成品A；
    (2)将半成品A的结构层进行反光处理，制得含弧面反光三棱镜阵列的反光膜半成品B；
    (3)将半成品B的底材层背面进行热熔贴合层处理，采用热熔胶淋涂的方式，产生半成品C。
    (4)将半成品C进行分条，收卷，最终形成反光贴条。
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