US 12,449,708 B2
Light path control device
Youngki Song, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Jul. 7, 2023, as Appl. No. 18/219,321.
Claims priority of application No. 10-2022-0130136 (KR), filed on Oct. 12, 2022.
Prior Publication US 2024/0126133 A1, Apr. 18, 2024
Int. Cl. G02F 1/29 (2006.01)
CPC G02F 1/29 (2013.01) 14 Claims
OG exemplary drawing
 
1. A light path control device comprising:
a substrate;
a first viewing angle control member on the substrate comprising a first electrode, a second electrode, and a liquid crystal layer between the first electrode and the second electrode; and
a second viewing angle control member on the first viewing angle control member comprising light shielding patterns patterned at predetermined intervals,
wherein the liquid crystal layer is configured, in a first mode, to have a first refractive index equal to a refractive index of the substrate and transmit a first side light incident through the substrate without refraction and, in a second mode, to have a second refractive index greater than a refractive index of the substrate and refract a second side light incident through the substrate adjacent to a normal line of the first viewing angle control member and transmit the refracted light.