US 12,004,410 B2
Optical system including light control film and fresnel lens
Tao Liu, Woodbury, MN (US); Gary T. Boyd, Woodbury, MN (US); Daniel J. Schmidt, Woodbury, MN (US); Caleb T. Nelson, McKinney, TX (US); Owen M. Anderson, Minneapolis, MN (US); Tri D. Pham, Woodbury, MN (US); Encai Hao, Woodbury, MN (US); and Shu-Ching Fan, Woodbury, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 17/768,421
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Oct. 29, 2020, PCT No. PCT/IB2020/060183
§ 371(c)(1), (2) Date Apr. 12, 2022,
PCT Pub. No. WO2021/090129, PCT Pub. Date May 14, 2021.
Claims priority of provisional application 62/932,673, filed on Nov. 8, 2019.
Prior Publication US 2024/0122043 A1, Apr. 11, 2024
Int. Cl. G02B 3/08 (2006.01); H10K 59/80 (2023.01)
CPC H10K 59/879 (2023.02) [G02B 3/08 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An optical system comprising:
a light source;
an optical film curved about a first axis and comprising a microstructured first major surface and an opposing second major surface, the microstructured first major surface defining a linear Fresnel lens comprising a plurality of Fresnel elements extending longitudinally along the first axis; and
a light control film curved about the first axis and disposed between the light source and the optical film, the first major surface of the optical film facing the light control film, the light control film comprising a plurality of alternating optically transmissive and optically absorptive regions extending longitudinally along the first axis such that in a cross-section orthogonal to the first axis, for at least a majority of the optically transmissive regions, a centerline between adjacent optically absorptive regions is substantially normal to a major surface of the light control film.