Film structure, shell, and electronic device

Patent metadata

Field	Value
Publication number	US-11451653-B2
Application number	US-202016902531-A
Country	US
Kind code	B2
Filing date	Jun 16, 2020
Priority date	Jun 19, 2019
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

A film structure, a method for manufacturing the film structure, a shell, and an electronic device are disclosed. The film structure includes a first film assembly and a second film assembly. The first film assembly includes a first film and a texture layer stacked sequentially. The second film assembly includes a second film and a ribbon unit disposed on the second film. The second film assembly is laminated on the first film assembly. The ribbon unit is located adjacent to the first film, and an orthographic projection of the ribbon unit projected on a plane on which the texture layer is located falls in the texture layer.

First claim

What is claimed is:

1. A film structure, comprising:
a first film assembly, comprising a first film and a texture layer stacked on one another sequentially; and
a second film assembly, stacked on the first film assembly and comprising a second film and a ribbon unit disposed on the second film, wherein the ribbon unit is located adjacent to the first film, and an orthographic projection of the ribbon unit projected on a plane on which the texture layer is located falls in the texture layer,
wherein the texture layer has a first texture area, and the first texture area having:
a plurality of first convex bars parallel to each other and a plurality of second convex bars parallel to each other disposed in the first texture area, the plurality of first convex bars and the plurality of second convex bars are alternately arranged, and a height of each second convex bar is less than a height of each first convex bar; or
a plurality of convex bar groups disposed in the first texture area, each convex bar group comprising a first convex bar and a second convex bar parallel to and spliced with each other, and a height of the second convex bar is less than a height of the first convex bar.

2. The film structure as claimed in claim 1 , wherein each of the plurality of first convex bars and an adjacent one of the plurality of second convex bars are arranged without a gap.

3. The film structure as claimed in claim 1 , wherein the plurality of convex bar groups are arranged in an array.

4. The film structure as claimed in claim 1 , wherein a height difference between the first convex bar and the second convex bar is in a range from 2 μm to 4 μm, and a width of the first convex bar is equal to a width of the second convex bar.

5. The film structure as claimed in claim 1 , wherein the ribbon unit comprises a first ribbon area, a position of the first ribbon area corresponds to a position of the first texture area, and an orthographic projection of the first ribbon area projected on a plane on which the first texture area is located falls in the first texture area.

6. The film structure as claimed in claim 5 , wherein the ribbon unit comprises a first monochrome layer and a gradient color layer disposed in the first ribbon area, the first monochrome layer is disposed on the second film, and the gradient color layer is disposed at one side of the first monochrome layer away from the second film.

7. The film structure as claimed in claim 1 , wherein the texture layer comprises a second texture area, and a plurality of third convex bars parallel to each other are disposed in the second texture area.

8. The film structure as claimed in claim 7 , wherein a cross section of each first convex bar in a direction perpendicular to an extension direction of the first convex bar is in shape of a triangle or a trapezoid; and/or
a cross section of each second convex bar in a direction perpendicular to an extension direction of the second convex bar is in shape of a triangle or a trapezoid; and/or
a cross section of each third convex bar in a direction perpendicular to an extension direction of the third convex bar is in shape of a triangle or a trapezoid.

9. The film structure as claimed in claim 7 , wherein the ribbon unit comprises a second ribbon area, a position of the second ribbon area corresponds to a position of the second texture area, and an orthographic projection of the second ribbon area projected on a plane on which the second texture area is located falls in the second texture area.

10. The film structure as claimed in claim 9 , wherein the ribbon unit comprises a plurality of second monochrome layers in the second ribbon area, and the plurality of second monochrome layers are stacked on the second film sequentially.

11. The film structure as claimed in claim 7 , wherein an extension line of the third convex bar along an extension direction of the third convex bar intersects with an extension line of the first convex bar along an extension direction of the first convex bar.

12. The film structure as claimed in claim 7 , wherein a distance between an edge of the orthographic projection of the first ribbon area on the first texture area and an edge of the first texture area is greater than 0.2 millimeters.

13. The film structure as claimed in claim 1 , wherein the first film assembly further comprises a reflection unit, and the reflection unit is coated at one side of the texture layer away from the first film;
wherein the reflection unit comprises:
an attaching layer, disposed at one side of the texture layer away from the first film;
a first refraction layer, disposed at one side of the attaching layer away from the texture layer; and
a second refraction layer, disposed at one side of the first refraction layer away from the attaching layer, and a refractive index of the first refraction layer is less than a refractive index of the second refraction layer.

14. The film structure as claimed in claim 13 , wherein the reflection unit further comprises an interlayer, the interlayer is located between the first refraction layer and the second refraction layer, and the interlayer is an alumina layer or a silicon dioxide layer.

15. The film structure as claimed in claim 14 , wherein the attaching layer is an alumina layer, and a thickness of the attaching layer is in a range from 30 nm to 40 nm;
the first refraction layer is an indium layer, and a thickness of the first refraction layer is in a range from 10 nm to 30 nm;
the interlayer is an alumina layer, and a thickness of the interlayer is in a range from 30 nm to 40 nm; and
the second refraction layer is a titanium dioxide layer, and a thickness of the second refraction layer is in a range from 3 nm to 7 nm.

16. The film structure as claimed in claim 13 , wherein the reflection unit further comprises a third refraction layer, the third refraction layer is located between the attaching layer and the first refraction layer, and a refractive index of the third refraction layer is greater than the refractive index of the first refraction layer.

17. The film structure as claimed in claim 16 , wherein the reflection unit further comprises a first protection layer and a second protection layer, the first protection layer is located between the first refraction layer and the third refraction layer, the second protection layer is located between the first refraction layer and the second refraction layer, the first protection layer is an alumina layer or a silicon dioxide layer, and the second protection layer is an alumina layer or a silicon dioxide layer.

18. The film structure as claimed in claim 17 , wherein the attaching layer is a silicon dioxide layer, and a thickness of the attaching layer is in a range from 8 nm to 12 nm;
the third refraction layer is a trititanium pentoxide layer, and a thickness of the third refraction layer is in a range from 7 nm to 17 nm;
the first protection layer is a silicon dioxide layer, and the thickness of the first protection layer is in a range from 10 nm to 20 nm;
the first refraction layer is an indium layer, and a thickness of the first refraction layer is in a range from 10 nm to 20 nm;
the second protection layer is a silicon dioxide layer, and a thickness of the second protection layer is in a range from 20 nm to 30 nm; and
the second refraction layer is a trititanium pentoxide layer, and a thickness of the second refraction layer is in a range from 5 nm to 9 nm.

19. A shell, comprising:
a substrate; and
a film structure, wherein the film structure is

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Qiu Jinglong

Classifications

• B44C1/105 Primary

  comprising an adhesive layer (decalcomania B44C1/16; adhesive tapes C09J7/20) · CPC title

• H05K5/0243

  for decorative purposes · CPC title

• B44C3/02

  Superimposing layers {(B44C3/005 takes precedence)} · CPC title

• B44F1/08

  characterised by colour effects · CPC title

• H04M1/0283 Primary

  for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate · CPC title