US 12,228,837 B2
Electrophoretic particle and light route control member having the same
Jin Gyeong Park, Seoul (KR); Byung Sook Kim, Seoul (KR); Moo Seong Kim, Seoul (KR); and Jeung Ook Park, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/754,012
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Sep. 14, 2020, PCT No. PCT/KR2020/012350
§ 371(c)(1), (2) Date Mar. 21, 2022,
PCT Pub. No. WO2021/054686, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 10-2019-0115633 (KR), filed on Sep. 19, 2019; and application No. 10-2019-0124600 (KR), filed on Oct. 8, 2019.
Prior Publication US 2022/0373852 A1, Nov. 24, 2022
Int. Cl. G02F 1/167 (2019.01); G02F 1/1676 (2019.01); G02F 1/1675 (2019.01)
CPC G02F 1/1676 (2019.01) [G02F 1/167 (2013.01); G02F 2001/1678 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An electrophoretic particle comprising carbon black,
wherein the electrophoretic particle includes a core portion; and a shell portion disposed to surround the outer surface of the core portion,
wherein a protrusion is formed on the surface of the core part,
wherein the core part has a chromaticity index of 2 or less,
wherein the core part has a light absorptivity of 90% to 99%,
wherein the electrophoretic particle has a particle diameter of 50 nm to 800 nm.