US 12,332,513 B2
Manufacturing method of light modulation device
Doo Young Huh, Daejeon (KR); Beom Jin Lee, Daejeon (KR); Sung Yoon Lee, Daejeon (KR); Nam Gyu Kim, Daejeon (KR); and Dong Hyun Oh, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 18/017,122
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Sep. 15, 2021, PCT No. PCT/KR2021/012588
§ 371(c)(1), (2) Date Jan. 20, 2023,
PCT Pub. No. WO2022/060085, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. 10-2020-0119125 (KR), filed on Sep. 16, 2020.
Prior Publication US 2023/0266612 A1, Aug. 24, 2023
Int. Cl. G02F 1/1333 (2006.01); G02F 1/1339 (2006.01); G02F 1/1341 (2006.01); G02F 1/1337 (2006.01)
CPC G02F 1/133354 (2021.01) [G02F 1/1339 (2013.01); G02F 1/1341 (2013.01); G02F 1/1337 (2013.01); G02F 2201/50 (2013.01); G02F 2202/04 (2013.01); G02F 2202/06 (2013.01); G02F 2202/28 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for manufacturing a light modulation device, comprising:
transferring a first substrate between a first unwind roll and a take-up roll, wherein an adhesive layer is disposed on a first surface of the first substrate, wherein the adhesive layer comprises a cured product of a curable adhesive composition;
transferring a second substrate between a second unwind roll and the take-up roll, wherein the second substrate includes a spacer and a liquid crystal alignment film formed on a first surface of the second substrate during the transfer and prior to an attachment with the adhesive layer of the first substrate;
attaching the first and second substrates via respective first surfaces thereof by passing the first and second substrates through an opening between adjacent attachment rolls to form a light modulation device; and
heat-treating the first substrate before the attaching of the first and second substrates,
wherein the light modulation device comprises the first surface and the second substrate having the spacer, liquid crystal alignment film and the adhesive layer disposed therebetween, and wherein the spacer maintains a gap between the first and second substrates.