US 12,153,323 B2
Light path control member, and display device comprising same
Jin Mi Noh, Seoul (KR); Byung Sook Kim, Seoul (KR); Ho Young Kim, Seoul (KR); and Hyeon Ji Hong, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 18/260,132
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Jan. 4, 2022, PCT No. PCT/KR2022/095003
§ 371(c)(1), (2) Date Jun. 30, 2023,
PCT Pub. No. WO2022/146132, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 10-2021-0000219 (KR), filed on Jan. 4, 2021; and application No. 10-2021-0000225 (KR), filed on Jan. 4, 2021.
Prior Publication US 2024/0061304 A1, Feb. 22, 2024
Int. Cl. G02F 1/16766 (2019.01); G02F 1/1333 (2006.01); G02F 1/1335 (2006.01); G02F 1/1343 (2006.01)
CPC G02F 1/16766 (2019.01) [G02F 1/13338 (2013.01); G02F 1/133514 (2013.01); G02F 1/134318 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A light path control member comprising:
a first substrate on which a first direction and a second direction are defined;
a first electrode disposed on the first substrate;
a buffer layer disposed on the first substrate and the first electrode;
a second substrate disposed on the first substrate;
a second electrode disposed under the second substrate; and
a light conversion unit disposed between the first electrode and the second electrode,
wherein the light conversion unit includes a plurality of partition wall portions, and a plurality of accommodating portions disposed between adjacent partition wall portions of the plurality of partition wall portions,
wherein the plurality of accommodating portions extend in the second direction,
wherein the first electrode includes a plurality of first pattern electrodes extending in the second direction and spaced apart from each other,
wherein the buffer layer is disposed on the first substrate to cover the plurality of first pattern electrodes,
wherein the buffer layer includes a first portion overlapping with the plurality of first pattern electrodes along a thickness direction of the first substrate, and a second portion that does not overlap with the plurality of first pattern electrodes along the thickness direction,
wherein the first portion is disposed between the light conversion unit and the first pattern electrodes,
wherein the second portion is disposed between the light conversion unit and the first substrate, and
wherein the first portion of the buffer layer includes a convex surface that is convex toward the plurality of accommodating portions with respect to the second portion.
 
6. A light path control member comprising:
a first substrate on which a first direction and a second direction are defined;
a first electrode disposed on the first substrate;
a second substrate disposed on the first substrate;
a second electrode disposed under the second substrate; and
a light conversion unit disposed between the first electrode and the second electrode,
wherein the light conversion unit includes a plurality of partition wall portions, and a plurality of accommodating portions disposed between adjacent partition wall portions of the plurality of partition wall portions,
wherein the plurality of accommodating portions extend in the second direction,
wherein the first electrode includes a plurality of first pattern electrodes extending in the second direction and spaced apart from each other,
wherein a width in the first direction of each first pattern electrode of the plurality of first pattern electrodes is greater than a width in the first direction of a lower part of each of the plurality of accommodating portions,
wherein each first pattern electrode includes a first overlapping region that overlaps with the plurality of partition wall portions without overlapping with the lower part of the accommodating portion and a second overlapping region overlapping with the lower part of the plurality of accommodating portions, and
wherein a width in the first direction of the second overlapping region is greater than a width in the first direction of the first overlapping region.