CN209767585U - Hand-held terminal rear cover and decorative film thereof - Google Patents

Abstract

The utility model relates to a decorative film, texture's existence is formed with a plurality of tiny lens structures on the texture layer in other words, through small lens structure's refraction effect, can make the graphic structure on the graphic layer demonstrate the suspension effect. In addition, because the size of the texture structure is 0.1 to 30 micrometers, light can generate an interference phenomenon through the texture layer, and the interference generates color fringes, so that the surface of the decorative film presents color. Through the matching of the texture structure and the pattern structure, the surface of the decorative film can finally present colorful and suspended pattern effects. Therefore, the decorative film can remarkably improve the visual experience of a user. Furthermore, the utility model discloses still provide lid behind a handheld terminal.

Description

Hand-held terminal rear cover and decorative film thereof

Technical Field

the utility model relates to an electronic product technical field, in particular to lid behind handheld terminal and decorating film thereof.

Background

The interior of most mobile phone rear covers is pasted with a decorative film, so that the electronic components of the mobile phone body are shielded, the individuality of the product is highlighted, and the added value of the product is improved. The existing decorative film generally realizes rich appearance effect by matching optical textures with a coated film or a color film.

common textures are cylindrical textures, triangular textures, trapezoidal textures, spherical textures, and the like. Too large a texture dimension (equal to the line width plus the line spacing) can result in the texture being easily found, resulting in a poor appearance experience. However, if the texture is too dense, optical interference may occur, which may produce faint colored light, which may spoil the pure color of the decorative film and result in a messy appearance. Thus, the size of the texture is typically on the order of tens of microns (typically 30um to 150um) and the depth is on the order of a few microns (typically 2-10 um).

However, the fact that the color of the decorative film is too intense to be perceived and monotonous in color cannot be changed regardless of the size of the texture. When applied to some high-end products, the visual experience of users is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a rear cover of a terminal and a decoration film thereof, which can improve the visual experience of a user, for solving the problem that the visual experience of the existing decoration film is poor.

The decorative film comprises a substrate, wherein a texture layer and a graphic layer are formed on the surface of the substrate, the texture layer is provided with a concave-convex texture structure, the graphic layer is provided with a graphic structure in a preset shape, the texture structure and the graphic structure are spaced in the thickness direction of the substrate by a preset distance, and the size of the texture structure is 0.1-30 micrometers.

The texture structure is formed on the texture layer, namely a plurality of tiny lens structures are formed on the texture layer, and the pattern structure on the pattern layer can show a suspension effect through the refraction effect of the tiny lens structures. In addition, because the size of the texture structure is 0.1 to 30 micrometers, light can generate an interference phenomenon through the texture layer, and the interference generates color fringes, so that the surface of the decorative film presents color. Through the matching of the texture structure and the pattern structure, the surface of the decorative film can finally present colorful and suspended pattern effects. Therefore, the decorative film can remarkably improve the visual experience of a user.

In one embodiment, the texture features have a size of 0.1 to 2 microns.

Since 0.1 to 2 microns are around 10 times the wavelength of most visible light. Therefore, the light passing through the texture structure generates a significant optical interference phenomenon, and the generated interference fringes are clearer and the boundaries between the fringes are more obvious. Moreover, since strong interference also causes dispersion, dynamic changes in color of the decorative film can also be observed, thereby further improving the color effect of the decorative film.

In one embodiment, the micro-block structure is formed by arranging a plurality of micro-block structures which are spaced from each other.

In one embodiment, the ratio of the area of the plurality of micro-block-shaped structures to the total area of the surface of the pattern layer is gradually changed along a preset direction.

At this time, the surface of the decorative film may also exhibit a gradient color.

In one embodiment, the texture layer comprises a substrate layer, and the texture features are formed on the substrate layer.

by arranging the substrate layer, the substrate can be prevented from being damaged by directly carrying out operations such as etching, stamping and the like on the substrate. Moreover, the texture of the substrate layer is soft, so that the texture structure is more convenient to form.

In one embodiment, the texture layer and the graphic layer are respectively attached to two opposite sides of the substrate.

Thus, the texture layer may be naturally spaced from the graphic layer by the substrate, thereby spacing the texture structure from the graphic structure.

In one embodiment, the protective base layer is attached to the surface of the texture layer or the graphic layer.

The protective base layer covers the texture layer or the graphic layer, so that the texture structure or the graphic structure can be protected to prevent the texture structure from collapsing or the graphic structure from being worn.

In one embodiment, the texture layer and the graphics layer are attached to the same side of the substrate, and the graphics layer is located between the substrate and the texture layer.

At this time, the texture layer can play a role in protecting the graphic layer, so that the graphic layer is prevented from being worn.

In one embodiment, the decorative film further comprises a cover bottom layer in a preset color, and the cover bottom layer is located on the outermost side of the decorative film.

The cover bottom layer can endow the decorative film with an initial color, so that the color effect of the decorative film is richer. And the bottom layer of the cover covers the texture layer or the graphic layer, and can also protect the texture structure and the graphic structure.

A handheld terminal cover, comprising:

A plate body; and

The decoration film according to any one of the above preferred embodiments, wherein the decoration film is attached to the surface of the plate body.

drawings

Fig. 1 is a schematic view of a film layer structure of a decoration film according to an embodiment of the present invention;

FIG. 2 is a schematic front view of a graphic layer in the decorative film shown in FIG. 1;

FIG. 3 is an enlarged schematic view of the texture feature of the decorative film of FIG. 1;

Fig. 4 is a schematic view of a film structure of a decorative film in a second embodiment of the present invention;

Fig. 5 is a schematic view of a film layer structure of a decorative film in a third embodiment of the present invention;

Fig. 6 is a schematic view of a film layer structure of a decorative film in the fourth embodiment of the present invention;

Fig. 7 is a schematic view of a film layer structure of a fifth embodiment of the present invention;

FIG. 8 is a schematic view of a film structure of a decorative film according to an embodiment of the present invention;

Fig. 9 is a schematic view of a film structure of a decoration film according to an embodiment of the present invention.

Detailed Description

in order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the present invention provides a rear cover and a decoration film 100 of a handheld terminal. The handheld terminal rear cover can be used for intelligent terminals such as mobile phones. The rear cover of the hand-held terminal includes a plate body (not shown) and a decoration film 100. The plate body is made of transparent material, generally a glass plate. The decoration film 100 is attached to a surface of the board body, thereby enabling the above-mentioned rear cover of the handheld terminal to realize a light and shadow effect.

Referring to fig. 2, a decoration film 100 according to a first embodiment of the present invention includes a substrate 110. The material of the substrate 110 may be PI, PET or resin, and the thickness is generally in the order of micrometers, which has better light transmittance. The substrate 110 has a first surface (not shown) and a second surface (not shown) opposite to each other, i.e., the upper surface and the lower surface shown in fig. 1.

The texture layer 120 and the pattern layer 130 are formed on the surface of the substrate 110. The texture layer 120 and the graphic layer 130 may be located on the same side of the substrate 110, or may be located on two opposite sides. The texture layer 120 has a texture 121 with concave and convex features. The texture structure 121 is a surface microstructure formed by a large number of fine concave-convex structures, and may be a convex texture or a concave texture, and common texture types include a cylindrical texture, a triangular texture, a trapezoidal texture, a spherical texture, and the like. Fig. 2 shows a cylindrical or spherical texture with a semi-circular or arcuate cross-section. Fig. 8 and 9 show a triangle texture and a trapezoid texture, respectively.

The texture structure 121 may be formed by imprinting, silk printing, laser etching, or the like. For the substrate 110 with soft texture, the texture structure 121 can be directly written on the surface thereof, and for the substrate 110 with hard texture, a glue layer can be coated on the surface of the substrate 110 and the texture structure 121 can be obtained by means of UV transfer printing.

Specifically, in the present embodiment, the texture layer 120 includes a substrate layer 123, and the texture structures 121 are formed on the substrate layer 123. The substrate layer 123 may be cured with UV glue and then embossed to form the texture features 121. By providing the substrate layer 123, the substrate 110 can be prevented from being damaged by directly performing operations such as etching and stamping on the substrate 110. Furthermore, the substrate layer 123 is softer in texture, which facilitates the formation of the texture feature 121.

Wherein the texture structures 121 have a size of 0.1 to 30 micrometers. As shown in fig. 3, the dimension L of the texture 121 refers to the line width W of a single texture and the line distance D between textures, i.e., L ═ W + D. It should be noted that, because the texture structure 121 belongs to a microstructure, the size of each texture cannot be guaranteed to meet the requirement under the existing machining precision. Therefore, the size of the texture 121 is considered to satisfy the above requirements as long as it is within the error allowance range.

Since the texture structures 121 have a size of 0.1 to 30 micrometers, light passing through the texture layer 120 may interfere with each other to generate color fringes, so that the surface of the decoration film 100 may show color.

In the present embodiment, the texture 121 has a size of 0.1 to 2 micrometers. Since 0.1 to 2 microns are around 10 times the wavelength of most visible light. Therefore, the light passing through the texture 121 generates a significant optical interference phenomenon, and the generated interference fringes are clearer and the boundaries between the fringes are more obvious. Moreover, since strong interference also causes dispersion, dynamic changes in color of the decoration film 100 can also be observed, thereby further improving the color effect of the decoration film 100.

Further, in the present embodiment, the depth of the texture 121 is 50 nm to 2 μm. Since the line width of the texture 121 is small (nano-scale), if the depth is too large, the mold is difficult to be separated from the surface of the substrate 110 after imprinting, thereby easily causing damage to the mold or collapse of the texture. When the depth of the texture structure 121 is set to 50 nm to 2 μm, the aspect ratio thereof is suitable, thereby preventing the mold from being damaged or the texture structure 121 from collapsing.

the graphic layer 130 has a graphic structure 131 with a predetermined shape thereon. Specifically, the pattern structure 131 may be a printed planar pattern, or minute bumps or pits, which may be formed by various means such as printing, exposure, etching, UV transfer, and the like. The shape of the pattern structure 131 may be a regular pattern. For example, circular, rectangular, etc. geometric shapes; and may also be an irregular pattern. Such as brand LOGO, animal and plant patterns, etc.

Further, the texture structures 121 and the pattern structures 131 are spaced apart by a predetermined distance in the thickness direction of the substrate 110. That is, the texture layer 120 and the graphic layer 130 are two separate film layer structures.

Specifically, in the present embodiment, the texture layer 120 and the graphic layer 130 are respectively attached to two opposite sides of the substrate 110. Thus, the texture layer 120 may be naturally spaced from the graphic layer 130 by the substrate 110 such that the texture features 121 are spaced from the graphic features 131.

The presence of the texture structure 121 also corresponds to the formation of a plurality of fine lens structures on the texture layer 120. Furthermore, texture structures 121 are spaced apart from graphics structures 131. Therefore, under the refraction action of the tiny lens structures, the pattern structures 131 on the pattern layer 130 can be deformed to exhibit a floating effect. By cooperating with the generated interference fringes of the texture structures 121, the surface of the decoration film 100 may finally exhibit a colorful and floating pattern effect, so as to significantly enhance the visual experience of the user.

the pattern structure 131 may be an integrally formed pattern, or may be a pattern in which a plurality of microstructures are arranged in a predetermined order. In the present embodiment, the pattern structure 131 is formed by arranging a plurality of micro-block structures 1312 spaced apart from each other.

Specifically, the microblock-like structures 1312 may have regular or irregular shapes such as circles, rectangles, triangles, etc. The micro-block structures 1312 are arranged according to a predetermined rule to form the pattern structure 131 with a predetermined shape in macroscopic view. Since the pattern structure 131 is a discontinuous structure, the gaps between adjacent micro-block structures 1312 are light permeable, so that light interference and scattering are enhanced, and the suspension effect is more remarkable.

further, in the present embodiment, the ratio of the area of the plurality of micro-block structures 1312 to the total area of the surface of the graphic layer 130 gradually changes along a predetermined direction.

At this time, the pattern structure 131 is a gradation pattern. In the direction of the gradient, a change in the ratio can be achieved by shrinking or increasing the size of the microblock-like structures 1312. As shown in fig. 2, the microblock-like structures 1312 are distributed in a "gradient" manner from the middle to the edge of the graphic layer 130, and the distribution number thereof becomes gradually sparse. At this time, the surface of the decoration film 100 shows a gradual change in color from the inside to the outside, or from the outside to the inside.

Specifically, in the present embodiment, the microblock 1312 has a size of 3 to 200 micrometers and a depth of 1 to 20 micrometers.

Specifically, the dimensions of microblock 1312 are defined as the dimensions of texture 121, which refers to the sum of the width of a single microblock 1312 and the distance between the microblock 1312. The microblock 1312 having the above size is equivalent to the micro lens structure formed by the texture 121, so that the floating effect generated after refraction by the texture 121 is more obvious.

Referring to fig. 4, the difference between the decoration film 100 of the second embodiment and the decoration film 100 of the first embodiment is: and a cover bottom layer 140 in a predetermined color, wherein the cover bottom layer 140 is located at the outermost side of the decoration film 100.

Specifically, the cover bottom layer 140 is attached to the surface of the texture layer 120. The cover bottom layer 140 may impart an initial color to the decoration film 100, thereby making the color effect of the decoration film 100 richer. Moreover, the cover bottom layer 140 covers the texture layer 120 and also protects the texture 121 to prevent the texture 121 from collapsing.

Referring to fig. 5, the difference between the decoration film 100 of the third embodiment and the decoration film 100 of the second embodiment is: the texture layer 120 and the graphic layer 130 are attached to the same side of the substrate 110, and the graphic layer 130 is located between the substrate 110 and the texture layer 120.

Specifically, the pattern layer 130 may be formed on the surface of the substrate 110, and then the texture layer 120 may be formed by UV transfer or the like. The texture layer 120 and the graphic layer 130 are stacked on and in contact with each other. At this time, the texture layer 120 may protect the graphic layer 130, thereby preventing the graphic layer 130 from being worn.

Referring to fig. 6, the decoration film 100 of the fourth embodiment is different from the decoration film 100 of the first embodiment in that: and further includes a protective base layer 150, wherein the protective base layer 150 is attached to the surface of the texture layer 120.

Specifically, the protection base layer 150 may be formed by a material and a molding manner consistent with those of the substrate 110, and the protection base layer 150 may be adhered to the surface of the texture layer 120 by an adhesive layer (not shown). Since the protective base layer 150 covers the texture layer 120, the texture structure 121 can be protected to prevent the texture structure 121 from collapsing.

Referring to fig. 7, the difference between the decorative film 100 of the fifth embodiment and the decorative film 100 of the second embodiment is: and further comprises a protective base layer 150, wherein the protective base layer 150 is attached to the surface of the graphic layer 130.

Specifically, the protective base layer 150 may be adhered to the surface of the graphic layer 130 by an adhesive layer (not shown). Since the bottom cover layer 140 protects the texture structure 121 and the protection base layer 150 protects the pattern structure 131, the texture structure 121 and the pattern structure 131 are not easily worn, and the reliability of the decoration film 100 in the fifth embodiment is high.

The presence of the texture structure 121 in the rear cover of the handheld terminal and the decoration film 100 thereof is equivalent to the formation of a plurality of tiny lens structures on the texture layer 120, and the pattern structure 131 on the pattern layer 130 can exhibit a floating effect through the refraction effect of the tiny lens structures. In addition, since the texture structures 121 have a size of 0.1 to 30 micrometers, light passing through the texture layer 120 may generate an interference phenomenon, and the interference may generate color fringes, so that the surface of the decoration film 100 may exhibit a color. By the texture structures 121 and the graphic structures 131, the surface of the decoration film 100 can finally exhibit a colorful and suspended pattern effect. Therefore, the decoration film 100 can significantly enhance the visual experience of the user.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The decorative film comprises a base material and is characterized in that a texture layer and a graphic layer are formed on the surface of the base material, the texture layer is provided with a concave-convex texture structure, the graphic layer is provided with a graphic structure in a preset shape, the texture structure and the graphic structure are separated by a preset distance in the thickness direction of the base material, and the size of the texture structure is 0.1-30 micrometers.

2. The decorative film of claim 1, wherein the texture feature has a size of 0.1 to 2 microns.

3. The decorative film of claim 1, wherein the graphic structure is formed by an arrangement of a plurality of spaced apart microblock-like structures.

4. The decoration film of claim 3, wherein the ratio of the area of the plurality of micro-block structures to the total area of the surface of the graphic layer is gradually changed along a preset direction.

5. The decorative film of claim 1, wherein the texture layer comprises a substrate layer, the texture feature being formed on the substrate layer.

6. The decorative film of claim 1, wherein the texture layer and the graphic layer are attached to opposite sides of the substrate, respectively.

7. The decorative film of claim 6, further comprising a protective base layer attached to a surface of the texture layer or the graphic layer.

8. The decorative film of claim 1, wherein the texture layer and the graphic layer are attached to the same side of the substrate with the graphic layer between the substrate and the texture layer.

9. The decoration film according to any one of claims 1 to 8, further comprising a bank cover layer of a predetermined color, the bank cover layer being located at an outermost side of the decoration film.

10. a rear cover for a handheld terminal, comprising:

A plate body; and

The decoration film according to any one of claims 1 to 9, which is attached to a surface of the plate body.