US 11,867,939 B2
Composite optical film
Yi-Long Tyan, Taoyuan (TW); Ching-An Yang, Taoyuan (TW); Pin-Han Wang, Taoyuan (TW); Lung-Pin Hsin, Taoyuan (TW); and Hui-Yong Chen, Taoyuan (TW)
Assigned to UBRIGHT OPTRONICS CORPORATION, Taoyuan (TW)
Filed by UBRIGHT OPTRONICS CORPORATION, Taoyuan (TW)
Filed on Jul. 7, 2022, as Appl. No. 17/859,020.
Claims priority of provisional application 63/218,929, filed on Jul. 7, 2021.
Prior Publication US 2023/0008063 A1, Jan. 12, 2023
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/0036 (2013.01) [G02B 6/0051 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A composite optical film, said composite optical film comprising:
a first substrate;
a plurality of reversed prisms, disposed on a bottom surface of the first substrate; and
a first diffusion film, disposed over a top surface of the first substrate;
a plurality of first prisms, disposed over the first diffusion film, wherein the plurality of first prisms are disposed on a top surface of a second substrate, and the second substrate is disposed on a top surface of the first diffusion film; and
a plurality of second prisms, disposed over the plurality of first prisms, wherein the plurality of second prisms are disposed on a top surface of a third substrate, and the third substrate is disposed on a top surface of the plurality of first prisms,
wherein the plurality of first prisms include a plurality of first elevating portions and a plurality of first non-elevating portions, and
wherein the plurality of second prisms include a plurality of second elevating portions and a plurality of second non-elevating portions.