US 12,248,214 B2
Color filter
Junsuk Rho, Pohang-si (KR); Young-Ki Kim, Pohang-si (KR); Joohoon Kim, Pohang-si (KR); Won-Sik Kim, Pohang-si (KR); and Trevon Badloe, Pohang-si (KR)
Assigned to Postech Research and Business Development Foundation, Pohang-si (KR)
Filed by POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION, Pohang-si (KR)
Filed on Apr. 21, 2023, as Appl. No. 18/304,726.
Claims priority of application No. 10-2022-0054499 (KR), filed on May 3, 2022.
Prior Publication US 2023/0359080 A1, Nov. 9, 2023
Int. Cl. G02F 1/1335 (2006.01); G02F 1/1337 (2006.01); G02F 1/1343 (2006.01)
CPC G02F 1/133514 (2013.01) [G02F 1/133528 (2013.01); G02F 1/133707 (2013.01); G02F 1/134363 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A color filter comprising:
a nano structure layer comprising a base substrate and a plurality of nano structures which are disposed to be spaced apart from each other on the base substrate and each of which has an elliptical shape on a plane; and
a polarization control layer disposed on the nano structure layer and comprising liquid crystal molecules of which an alignment direction on a plane parallel to the base substrate is controlled by an electric field,
wherein each nano structure of the plurality of nano structures has a first diameter in a first direction and a second diameter in a second direction perpendicular to the first direction, the first diameter and the second diameter being different from each other, and
wherein the alignment direction is an alignment direction of each of long axes of the liquid crystal molecules, and the alignment direction is variably changed between the first direction and the second direction.