	US 12,441,843 B2
	Diffraction light guide plate and manufacturing method thereof
Jaeyoung Kim, Daejeon (KR); Hee Jung Choi, Daejeon (KR); Yeongrae Chang, Daejeon (KR); Heon Kim, Daejeon (KR); Hye Min Kim, Daejeon (KR); Youngsuk Kim, Daejeon (KR); and Soonhwa Jung, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/608,719
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Aug. 13, 2020, PCT No. PCT/KR2020/010731 § 371(c)(1), (2) Date Nov. 3, 2021, PCT Pub. No. WO2021/029693, PCT Pub. Date Feb. 18, 2021.
Claims priority of application No. 10-2019-0099705 (KR), filed on Aug. 14, 2019; and application No. 10-2020-0100670 (KR), filed on Aug. 11, 2020.
Prior Publication US 2022/0315707 A1, Oct. 6, 2022
Int. Cl. C08G 75/08 (2006.01); B29C 43/00 (2006.01); B29C 43/02 (2006.01); B29D 11/00 (2006.01); C08L 81/02 (2006.01); F21V 8/00 (2006.01); G02B 5/18 (2006.01); B29K 105/00 (2006.01); B29L 11/00 (2006.01)

CPC C08G 75/08 (2013.01) [B29C 43/003 (2013.01); B29C 43/021 (2013.01); B29D 11/00663 (2013.01); C08L 81/02 (2013.01); G02B 5/1814 (2013.01); G02B 5/1847 (2013.01); G02B 6/005 (2013.01); G02B 6/0065 (2013.01); B29C 2043/025 (2013.01); B29K 2105/0094 (2013.01); B29K 2995/0031 (2013.01); B29K 2995/0046 (2013.01); B29K 2995/0073 (2013.01); B29K 2995/0082 (2013.01); B29K 2995/0094 (2013.01); B29L 2011/0075 (2013.01)]

9 Claims

1. A diffraction light guide plate, comprising an optical layer having a diffraction lattice pattern formed on one surface, wherein:

the diffraction lattice pattern is formed as an integrated structure without an interface on the one surface of the optical layer;

a difference in refractive index between the diffraction lattice pattern and the one surface of the optical layer is 0.01 or less;

the optical layer having diffraction lattice pattern formed on one surface is a continuous phase of polymer comprising an episulfide compound, a thiol compound, and an aromatic cyclic compound including two or more hydroxyl groups; and

warp of the diffraction light guide plate is 100 μm or less.