公开(公告)号：US20200341336A1

公开(公告)日：2020-10-29

申请号：US16959710

申请日：2019-01-03

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Tri D. Pham ,  Corey D. Balts ,  Felix B Bierbaum ,  Encai Hao ,  Simon P. Janeczko ,  Thomas J. Ludemann ,  Trevor W. Stolber ,  Qingbing Wang ,  Joseph D. Wheeldon

IPC: G02F1/13357 ,  F21V8/00

Abstract: An optical film assembly comprises a light redirecting film (110) having a first structured major surface (112) and a second, opposed major surface (114). An optical adhesive layer (120) is disposed on the second major surface of the light redirecting film. A light diffusion film (140) comprises a first major surface (142) comprising a light diffusion surface and a second, opposed major surface (144). A plurality of discrete optical decoupling structures (146) project from the light diffusion surface and contact the optical adhesive layer. An air gap (148) is defined between the first major surface of the light diffusion film and the optical adhesive layer. Embodiments of optical film assemblies described herein are useful, for example, for hiding optical defects and improving the brightness uniformity of light emitted by a light source.

公开(公告)号：US20250033319A1

公开(公告)日：2025-01-30

申请号：US18714236

申请日：2022-12-02

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Vivian W. Jones ,  Gordon A. Kuhnley ,  Joseph D. Wheeldon ,  Qunyi Chen ,  Jodi L. Connell ,  Alexander C. Eldredge ,  Lijun Zu ,  Lynn E. Lorimor ,  Feng Bai ,  Olester Benson

IPC: B32B3/30 ,  B32B27/08 ,  B32B27/30

Abstract: Structured surfaces are described. In one embodiment, the structured surface comprises a plurality of structures having complement cumulative slope magnitude distribution (Fcc) such that at least 30, 40, 50, 60, 70, 80 or 90% of structures have a slope greater than 10 degrees; and less than 80% of the structures have a slope greater than 35 degrees. In other embodiments, the structures comprise peaks and valleys defined by a Cartesian coordinate system such that the peaks and valleys have a width and length in the x-y plane and a height in the z-direction and at least a portion of the peaks and/or valleys vary in height in the y direction and/or the x-direction by at least 10% of the average height. Articles and methods are also described.