US 12,248,158 B2
Multilayer optical film structure and method of manufacturing the same
Ying-Tung Chen, Taoyuan (TW)
Assigned to YTDIAMOND CO., LTD., Taoyuan (TW)
Filed by YTDIAMOND CO., LTD., Taoyuan (TW)
Filed on Feb. 24, 2023, as Appl. No. 18/113,693.
Claims priority of application No. 111110977 (TW), filed on Mar. 24, 2022.
Prior Publication US 2023/0305198 A1, Sep. 28, 2023
Int. Cl. B32B 3/30 (2006.01); B32B 7/023 (2019.01); F21V 5/00 (2018.01); G02B 5/02 (2006.01); B32B 7/12 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01); B32B 27/40 (2006.01); F21Y 115/10 (2016.01)
CPC G02B 5/0268 (2013.01) [B32B 3/30 (2013.01); B32B 7/023 (2019.01); F21V 5/002 (2013.01); B32B 7/12 (2013.01); B32B 27/302 (2013.01); B32B 27/304 (2013.01); B32B 27/32 (2013.01); B32B 27/36 (2013.01); B32B 27/365 (2013.01); B32B 27/40 (2013.01); B32B 2307/418 (2013.01); F21Y 2115/10 (2016.08)] 6 Claims
OG exemplary drawing
 
1. A multilayer optical film structure, comprising:
a base layer having a first surface and a second surface opposite to the first surface;
a first optical structure disposed on the first surface of the base layer; and
a second optical structure disposed on the second surface of the base layer, and including a first structural layer, a second structural layer and a third structural layer, wherein the first structural layer is located between the base layer and the second structural layer, and the second structural layer is located between the first structural layer and the third structural layer;
wherein a difference between a refractive index of the first structural layer and a refractive index of the second structural layer is greater than or equal to 0.1;
wherein the first optical structure has a plurality of first sharp corners, the first structural layer has a plurality of second sharp corners, the second structural layer has a plurality of third sharp corners, and the third structural layer has a plurality of fourth sharp corners;
wherein an angle of the first sharp corner is larger than an angle of the second sharp corner, an angle of the third sharp corner and an angle of the fourth sharp corner.