CN219634686U - Decorative film - Google Patents

Abstract

The utility model discloses a decorative film, which comprises a substrate, wherein the substrate is provided with a first surface and a second surface, the first surface and the second surface are oppositely arranged, and the first surface is provided with a grating structure; the second surface is provided with a light deflection structure; the light deflection structure deflects the normally incident light to an inclined angle. By arranging the light deflection structure, light is easier to generate light deflection diffraction, so that rainbow is bright in color, contrast is increased, and the requirement on ambient light intensity is reduced.

Description

Decorative film

Technical Field

The utility model relates to the field of optics, in particular to a decorative film.

Background

At present, a plurality of structurally colored films and products are used on the market, wherein the back of the film is coated with monochromatic light, and the grating diffraction of the surface layer is utilized to generate rainbow light. When light is perpendicularly incident into the grating structure, the light deflection is small, so that the rainbow color is not obvious or is relatively dim, and a decorative film is needed to solve the problem.

Disclosure of Invention

The utility model provides a decorative film, which deflects vertically incident light to an inclined angle by arranging a light deflection structure, so that the optical path is increased, and the inclined light is easier to generate light deflection diffraction, so that the rainbow is bright in color, the contrast is increased, and the requirement on the intensity of ambient light is reduced.

The decorative film provided by the utility model comprises a substrate, wherein the substrate is provided with a first surface and a second surface, the first surface is opposite to the second surface, and the first surface is provided with a grating structure; the second surface is provided with a light deflection structure; the light deflection structure deflects the normally incident light to an inclined angle.

Preferably, the grating structure is a cylindrical protrusion, a cylindrical groove, a sine column structure, a cosine column structure, a prism structure, a prismatic table structure or a stepped prismatic table structure which are repeatedly arranged.

Preferably, the light deflection structure is a convex rectangular pyramid, a convex cone or a concave rectangular pyramid arranged in an array.

Preferably, the diameter of the cylindrical protrusion or the cylindrical groove is between 10 μm and 500 μm, and the height or depth is between 5 μm and 200 μm.

Preferably, a section of the sinusoidal column structure is sinusoidal, the section is perpendicular to the extending direction of the sinusoidal column structure, the wavelength of the sinusoidal curve is between 10 μm and 500 μm, and the amplitude is between 5 μm and 100 μm; or a section of the cosine column structure is a cosine curve, the section is perpendicular to the extending direction of the cosine column structure, the wavelength of the cosine curve is between 10 mu m and 500 mu m, and the amplitude is between 5 mu m and 100 mu m.

Preferably, the height of the prism structures is between 5 μm and 200 μm, the width of the prisms is between 9 μm and 500 μm, and the spacing between adjacent prism structures is between 5 μm and 100 μm.

Preferably, the height of the prismatic table structure or the stepped prismatic table structure is between 10 μm and 200 μm; the width of the top of the prismatic table structure or the stepped prismatic table structure is between 3 and 30 mu m, and the width of the bottom is between 5 and 60 mu m; the spacing between adjacent prismatic table structures or adjacent stepped prismatic table structures is between 5 μm and 100 μm; the step-shaped terrace structure is 3 steps to 10 steps, and the width of each step is increased by 2 mu m to 10 mu m.

Preferably, the apex angle of the convex rectangular pyramid, the concave rectangular pyramid or the cone is between 70 ° and 110 °.

Preferably, the height of the raised rectangular pyramid, the recessed rectangular pyramid or the cone is between 5 μm and 50 μm.

Preferably, an image layer or a monochromatic color coating layer is further arranged between the substrate and the light deflection structure.

Preferably, the grating structure and/or the light deflecting structure further comprises a filling layer, which is of equal height as the grating structure and/or the light deflecting structure.

Preferably, the refractive index of the filling layer is different from the refractive index of the grating structure and/or the light deflection structure, and the refractive index of the filling layer is between 1.35 and 1.75.

Preferably, the surface of the light deflection structure is provided with a reflective coating.

Preferably, the thickness of the reflective coating is between 0.1 μm and 10 μm.

According to the decorative film, the light deflection structure is arranged, so that the light vertically incident to the decorative film is deflected to an inclined angle, the optical path is increased, and the inclined light is easier to generate light deflection diffraction, so that the rainbow is bright in color, the contrast ratio is increased, and the requirement on the intensity of ambient light is reduced.

Drawings

FIG. 1 is a schematic view of a decoration film according to an embodiment of the present utility model;

FIGS. 2a-2b are schematic side view of a decorative film according to an embodiment of the present utility model;

FIGS. 3a-3b are schematic side view of a decorative film according to an embodiment of the present utility model;

FIG. 4 is a schematic side view of a decorative film according to an embodiment of the present utility model;

FIG. 5 is a schematic side view of a decorative film according to an embodiment of the present utility model;

FIG. 6 is a schematic side view of a decorative film according to an embodiment of the present utility model;

FIG. 7 is a schematic side view of a decorative film according to an embodiment of the present utility model;

FIGS. 8a-8c are schematic side view of a decorative film according to an embodiment of the present utility model;

FIG. 9 is a schematic side view of a decorative film according to an embodiment of the present utility model;

FIG. 10 is a schematic side view of a decorative film according to an embodiment of the present utility model.

Wherein:

10 a substrate; 20 grating structures (cylindrical protrusions); 21 a cylindrical recess; 22 sine/cosine column structures; a 23 prism structure; 24 terrace with edge structure; a 25 step land structure; 30 a light deflecting structure; 40 a first fill layer; 50 a second fill layer; 60 reflective coating; 70 image layer/monocolor color coating

Detailed Description

The foregoing and other features, aspects, and advantages of the present utility model will become more apparent from the following detailed description of a preferred embodiment, which proceeds with reference to the accompanying drawings. The directional terms mentioned in the following embodiments are, for example: upper, lower, left, right, front or rear, etc., are merely references to the directions of the drawings. Thus, the directional terminology is used for purposes of illustration and is not intended to be limiting of the utility model.

The prismatic table structure is a columnar structure, and is a trapezoid structure, preferably an isosceles trapezoid, seen in the extending direction of the prismatic table structure; the prismatic structure is a columnar structure, and is a rectangular structure seen along the extending direction, and the height is preferably larger than the width; the stepped terrace is a columnar structure, is a laminated trapezoid structure seen along the extending direction, is narrow at the upper part and wide at the lower part, and the narrow side of the lower trapezoid is larger than the wide side of the upper trapezoid; the sine and cosine column structure is a column structure, and the column surface is sine/cosine wave-shaped when seen along the extending direction; the vertex angle of the rectangular pyramid is the vertex angle of a cross-section triangle formed by a plane passing through the vertex of the rectangular pyramid and perpendicular to two opposite side surfaces of the rectangular pyramid, and the vertex angle of the cone is the angle formed by the cone on any plane passing through the vertex of the cone and perpendicular to the bottom surface of the cone.

The utility model is described in further detail below with reference to the accompanying drawings:

fig. 1 is a schematic diagram of an ornamental film according to an embodiment of the present utility model, and fig. 2a-2b are schematic side views of the ornamental film according to the embodiment. The decorative film comprises a substrate 10, a grating structure 20 and a light deflection structure 30, wherein the substrate 10 is provided with a first surface and a second surface which are opposite, the grating structure 20 is arranged on the first surface, and the light deflection structure 30 is arranged on the second surface. In this embodiment, the grating structure 20 is a cylindrical bump structure that is repeatedly arranged. In this embodiment, the radius R of the cylindrical bump structure is 5 μm to 250 μm and the height H is 5 μm to 200 μm. The light deflection structure 30 is a raised rectangular pyramid arranged in an array, the bottom surface of the raised rectangular pyramid is square, the projection of the vertex of the raised rectangular pyramid on the bottom surface is positioned in the center (or square area) of the square, the vertex angle of the raised rectangular pyramid is 70-110 degrees, and the height of the raised rectangular pyramid is 5-50 μm. In other embodiments, the light deflecting structure 30 may be a convex cone or a concave rectangular pyramid with a cone apex angle of between 70 ° -110 °.

Fig. 3a-3b are schematic side views of a decorative film according to an embodiment of the present utility model. In this embodiment, the decorative film includes a substrate 10, a grating structure 21 and a light deflecting structure 30, the substrate 10 having opposite first and second surfaces, the grating structure 21 being disposed on the first surface and the light deflecting structure 30 being disposed on the second surface. The difference from the embodiment shown in fig. 1 is that the grating structure 21 is a repeating arrangement of cylindrical grooves with a radius of 5 μm-250 μm and a height of 5 μm-200 μm.

Fig. 4 is a schematic side view of a decorative film according to an embodiment of the utility model. In this embodiment, the decorative film includes a substrate 10, a grating structure 22 and a light deflecting structure 30, the substrate 10 having opposite first and second surfaces, the grating structure 22 being disposed on the first surface and the light deflecting structure 30 being disposed on the second surface. Unlike the embodiment shown in fig. 1, the grating structure 22 is a repeating arrangement of sine/cosine post structures, which are shown in fig. 4 as cross-sections perpendicular to the direction of extension of the post structures, the cross-sections of the post structures being sine/cosine curves. In this embodiment, the sine/cosine curve has a wavelength of between 10 μm and 500 μm and an amplitude of between 5 μm and 100 μm.

Fig. 5 is a schematic side view of a decorative film according to an embodiment of the utility model. In this embodiment, the decorative film includes a substrate 10, a grating structure 23 and a light deflecting structure 30, the substrate 10 having opposite first and second surfaces, the grating structure 23 being disposed on the first surface and the light deflecting structure 30 being disposed on the second surface. The difference from the embodiment shown in fig. 1 is that the grating structure 23 is a repeating prism structure, and the cross section of the prism structure is rectangular, and the cross section is perpendicular to the extending direction of the prism structure. The prism structures are high in the direction from the surface to the far surface of the substrate 10, wide in the direction of arrangement of the prism structures, and have a height of between 10 μm and 200 μm, a width of between 5 μm and 50 μm, and a spacing between adjacent prism structures of between 5 μm and 100 μm.

Fig. 6 is a schematic side view of a decorative film according to an embodiment of the utility model. In this embodiment, the decorative film includes a substrate 10, a grating structure 24 and a light deflecting structure 30, the substrate 10 having opposite first and second surfaces, the grating structure 24 being disposed on the first surface and the light deflecting structure 30 being disposed on the second surface. Unlike the embodiment shown in fig. 5, the grating structure 24 is a repeated arrangement of prismatic table structures, the cross section of the prismatic table structure is trapezoidal, the cross section is perpendicular to the extending direction of the prismatic table structure, the wide bottom of the trapezoid is adjacent to the substrate relative to the narrow bottom, and the included angle formed by the wide bottom and the waist is referred to as a base angle. In this embodiment, the cross section of the prismatic table structure is an isosceles trapezoid, and in other embodiments, the prismatic table structure may be a right trapezoid or a trapezoid with two base angles smaller than 90 ° and unequal. The distance between the wide and narrow bottoms of the trapezium is the height of the prismatic table structure, the length of the wide bottom is recorded as the width of the prismatic table structure, the height of the prismatic table structure is between 10 mu m and 200 mu m, the width of the narrow bottom of the trapezium is between 3 mu m and 30 mu m, the width of the wide bottom is between 5 mu m and 60 mu m, and the interval between the adjacent prismatic table structures (interval of the wide bottom) is between 5 mu m and 100 mu m.

Fig. 7 is a schematic side view of a decorative film according to an embodiment of the utility model. In this embodiment, the decorative film includes a substrate 10, a grating structure 25 and a light deflecting structure 30, the substrate 10 having opposite first and second surfaces, the grating structure 25 being disposed on the first surface and the light deflecting structure 30 being disposed on the second surface. Unlike the embodiment shown in fig. 6, the grating structure 25 is a repeated array of stepped pyramid structures, the cross section of each stepped pyramid structure is a plurality of stacked trapezoids, the cross section is perpendicular to the extending direction of the stepped pyramid structure, the wide bottom of each trapezium is adjacent to the substrate with respect to the narrow bottom, and the angle formed by the wide bottom and the waist is referred to herein as the base angle. In this embodiment, the cross section of the stepped terrace structure is a plurality of stacked isosceles trapezoids, and symmetry axes of the trapezoids are coincident, and in other embodiments, the stepped terrace structure may be a right trapezoid or a trapezoid with two base angles smaller than 90 ° and unequal. The stepped terrace structure may be a 3-step structure, i.e. a trapezoid with a cross section of 3 gradual changes superimposed, in other embodiments, the cross section may be at most 10 superimposed trapezoids, the width of each step being increased by 2 μm-10 μm. The distance from the lowest trapezoid wide bottom to the highest trapezoid narrow bottom of the cross section of the stepped terrace structure is the height of the stepped terrace structure, the length of the lowest trapezoid wide bottom is recorded as the width of the stepped terrace structure, the height of the stepped terrace structure is 10-200 mu m, the trapezoid narrow bottom is 3-30 mu m, the trapezoid wide bottom is 5-60 mu m, and the interval between adjacent stepped terrace structures (the interval between the lowest trapezoid wide bottom edges) is 5-100 mu m.

Fig. 8a-8c are schematic side views of a decorative film according to an embodiment of the present utility model. In this embodiment, the decorative film includes a substrate 10, a grating structure 25 and a light deflecting structure 30, the substrate 10 having opposite first and second surfaces, the grating structure 25 being disposed on the first surface and the light deflecting structure 30 being disposed on the second surface. The difference from the embodiment shown in fig. 7 is that the decorative film further comprises a filler layer. As shown in fig. 8a, the decorative film includes a first filling layer 40, where the first filling layer 40 is disposed between the stepped terrace structures 25 and has the same height as the stepped terrace structures, the first filling layer 40 is a resin filling layer, the refractive index of the filling layer is different from that of the grating structure 25, and the refractive index of the filling layer is between 1.35 and 1.75. As shown in fig. 8b, the decorative film includes a second filling layer 50, the second filling layer 50 is disposed between the light deflecting structures 30 and has the same height as the light deflecting structures 30, the second filling layer 50 is a resin filling layer, the refractive index of the filling layer is different from that of the light deflecting structures, and the refractive index of the filling layer is between 1.35 and 1.75. As shown in fig. 8c, a first filling layer 40 and a second filling layer 50 are respectively provided between the grating structure 25 and the light deflecting structure 30. In other embodiments, the first filling layer 40 is arranged between any of the grating structures 20-24 and/or the second filling layer 50 is arranged between the light deflecting structures 30.

Fig. 9 is a schematic side view of a decorative film according to an embodiment of the utility model. In this embodiment, the decorative film includes a substrate 10, a grating structure 20 and a light deflecting structure 30, the substrate 10 having opposite first and second surfaces, the grating structure 20 being disposed on the first surface and the light deflecting structure 30 being disposed on the second surface. Unlike the embodiment shown in fig. 1, the surface of the light deflecting structure 30 is further provided with a reflective coating 60, and the reflective coating 60 may be provided by vapor deposition or other coating methods. The thickness of the reflective coating 60 is between 0.1 μm and 10 μm. The reflective coating 60 may enhance the reflective effect of the light deflecting structure 30, so that the decorative film may be applied in a scene of weak ambient light. The reflective coating 60 may also be provided in a decorative film as in any of the embodiments of fig. 3-8.

Fig. 10 is a schematic side view of a decorative film according to an embodiment of the utility model. In this embodiment, the decorative film includes a substrate 10, a grating structure 20 and a light deflecting structure 30, the substrate 10 having opposite first and second surfaces, the grating structure 20 being disposed on the first surface and the light deflecting structure 30 being disposed on the second surface. The difference from the embodiment shown in fig. 9 is that an image layer 70 (or a single color coating) is further provided between the substrate 10 and the light deflecting structure 30, which enhances the color effect of the decorative film. The image layer 70 may also be provided in a decorative film as in any of the embodiments of fig. 1-8.

The foregoing description is only illustrative of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model, i.e., all simple and equivalent variations, combinations or modifications that fall within the scope of the utility model as defined in the appended claims and their equivalents. Furthermore, not all of the objects, advantages, or features of the present disclosure are required to be achieved by any one embodiment or claim of the present disclosure. Furthermore, the abstract and the title of the utility model are provided solely for the purpose of assisting patent document retrieval and are not intended to limit the scope of the claims. Furthermore, references to "first," "second," etc. in this specification or in the claims are only intended to name a few elements or to distinguish between different embodiments or ranges, and are not intended to limit the upper or lower limit on the number of elements.

Claims (12)

1. A decorative film comprising a substrate having a first surface and a second surface, the first surface disposed opposite the second surface, characterized in that:

the first surface is provided with a grating structure;

the second surface is provided with a light deflection structure; the light deflection structure deflects the vertical incident light to an inclined angle; the light deflection structure is a convex rectangular pyramid, a convex cone or a concave rectangular pyramid which are arranged in an array.

2. The decorative film of claim 1 wherein said grating structure is a repeating arrangement of cylindrical protrusions, cylindrical grooves, sinusoidal pillar structures, cosine pillar structures, prismatic mesa structures, or stepped prismatic mesa structures.

3. The decorative film according to claim 1, wherein the apex angle of the raised rectangular pyramid, the raised cone or the recessed rectangular pyramid is between 70 ° -110 °; the raised rectangular pyramid, the raised cone or the recessed rectangular pyramid has a height of between 5 μm and 50 μm.

4. The decorative film of claim 2, wherein the cylindrical protrusions or cylindrical grooves have a diameter of between 10 μιη and 500 μιη and a height or depth of between 5 μιη and 200 μιη.

5. The decorative film of claim 2 wherein said sinusoidal post structure has a cross-section that is sinusoidal, said cross-section being perpendicular to the direction of extension of the sinusoidal post structure, and wherein the sinusoidal has a wavelength between 10 μm and 500 μm and an amplitude between 5 μm and 100 μm; or a section of the cosine column structure is a cosine curve, the section is perpendicular to the extending direction of the cosine column structure, the wavelength of the cosine curve is between 10 mu m and 500 mu m, and the amplitude is between 5 mu m and 100 mu m.

6. The decorative film of claim 2 wherein said prismatic structures have a height of between 5 μm and 200 μm and a prismatic width of between 9 μm and 500 μm and adjacent prismatic structures have a pitch of between 5 μm and 100 μm.

7. The decorative film of claim 2 wherein said land structure or said stepped land structure has a height of between 10 μιη and 200 μιη; the width of the top of the prismatic table structure or the stepped prismatic table structure is between 3 and 30 mu m, and the width of the bottom is between 5 and 60 mu m; the spacing between adjacent prismatic table structures or adjacent stepped prismatic table structures is between 5 μm and 100 μm; the step-shaped terrace structure is 3 steps to 10 steps, and the width of each step is increased by 2 mu m to 10 mu m.

8. The decorative film of claim 1 wherein an image layer or a single color coating is further disposed between said substrate and said light deflecting structure.

9. The decorative film of claim 1 wherein the grating structure and/or the light deflecting structure further comprises a filler layer, the filler layer being of equal height to the grating structure and/or the light deflecting structure.

10. The decorative film according to claim 9, wherein the refractive index of the filling layer is different from the refractive index of the grating structure and/or the light deflecting structure, the refractive index of the filling layer being between 1.35-1.75.

11. The decorative film of claim 1 wherein the surface of the light deflecting structure is provided with a reflective coating.

12. The decorative film of claim 11 wherein said reflective coating thickness is between 0.1 μm and 10 μm.