US 11,852,922 B2
Backlight unit and display device including the same
RokHee Lee, Paju-si (KR); Hyunmin Park, Paju-si (KR); and MyungWon Seo, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Jul. 5, 2022, as Appl. No. 17/857,577.
Claims priority of application No. 10-2021-0091871 (KR), filed on Jul. 13, 2021.
Prior Publication US 2023/0026878 A1, Jan. 26, 2023
Int. Cl. G02F 1/13357 (2006.01); F21V 8/00 (2006.01)
CPC G02F 1/133611 (2013.01) [G02B 6/0065 (2013.01); G02F 1/133605 (2013.01); G02F 1/133606 (2013.01); G02B 6/0051 (2013.01); G02B 6/0055 (2013.01); G02F 1/133603 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A backlight unit comprising:
a plurality of light sources on a printed circuit;
a light source protective element on the plurality of light sources;
a base film on the light source protective element; and
a plurality of optical path control patterns on at least one surface of the base film, each of the plurality of optical path control patterns overlapping a corresponding light source from the plurality of light sources and configured to control optical paths of light generated by the corresponding light source that is incident on the optical path control pattern,
wherein the plurality of optical path control patterns comprise an acrylic-based resin or a polyester-based resin at least one type of inorganic particles dispersed in the acrylic-based resin or the polyester-based resin and a photoinitiator,
wherein the plurality of optical path control patterns include the photoinitiator of 1 wt % to 10 wt,
wherein the plurality of optical path control patterns comprise a plurality of protrusions disposed on at least one surface of the base film.