US 12,337,585 B2
Decorative film, light-emitting module, and electronic device
Lei Chen, Shenzhen City (GB)
Assigned to Nothing Technology Limited, London (GB)
Filed by Nothing Technology Limited, London (GB)
Filed on Jun. 30, 2023, as Appl. No. 18/345,846.
Claims priority of application No. 202210781101.1 (CN), filed on Jul. 4, 2022.
Prior Publication US 2024/0004267 A1, Jan. 4, 2024
Int. Cl. B32B 7/12 (2006.01); B32B 3/08 (2006.01)
CPC B32B 7/12 (2013.01) [B32B 3/085 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A decorative film, used to cover a light-emitting surface of a light-emitting element and comprising:
a film body made of a transparent or semi-transparent material; and
a decorative layer disposed at the film body and comprising a texture layer and/or a semi-transparent colored ink layer, the texture layer being transparent or semi-transparent, wherein
when the light-emitting element emits no light, the texture layer enables the decorative film to present at least one of a pattern effect, a dazzle effect, a matt effect, or a color-change effect, and the semi-transparent colored ink layer enables the decorative film to present the same color as the semi-transparent colored ink layer,
wherein the decorative layer comprises the texture layer disposed on a side surface of the film body away from the light-emitting element, wherein the texture layer comprises a first texture layer and a second texture layer, wherein the first texture layer is configured to present a first appearance effect, the second texture layer is configured to present a second appearance effect, and the first appearance effect is different from the second appearance effect,
wherein the second texture layer comprises a plurality of microstructures disposed on the side surface of the film body away from the light-emitting element, and a brightness-enhancement film covering the plurality of microstructures, wherein each of the microstructures has at least one reflective surface, and the reflective surface and the film body define an included angle greater than 90°, wherein the microstructures comprise pyramid structures arranged in an array or frustum structures arranged in an array, each microstructure providing multi-angle light reflection, and wherein the second texture layer is configured to present the dazzle effect; and
wherein the first texture layer is disposed on a side surface of the brightness-enhancement film away from the film body, the first texture layer comprises at least one of a linear texture, a coil texture, or a wave texture, and the first texture layer is configured to present the pattern effect.