US 12,321,072 B2
Optical device
Jung Woon Kim, Daejeon (KR); Dong Hyun Oh, Daejeon (KR); Jung Sun You, Daejeon (KR); Jin Hong Kim, Daejeon (KR); and Min Jun Gim, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 18/007,820
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jul. 2, 2021, PCT No. PCT/KR2021/008393
§ 371(c)(1), (2) Date Dec. 2, 2022,
PCT Pub. No. WO2022/010185, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. 10-2020-0084734 (KR), filed on Jul. 9, 2020; and application No. 10-2020-0142095 (KR), filed on Oct. 29, 2020.
Prior Publication US 2023/0229050 A1, Jul. 20, 2023
Int. Cl. G02F 1/137 (2006.01); G02F 1/1333 (2006.01); G02F 1/1335 (2006.01); G02F 1/1337 (2006.01); G02F 1/1339 (2006.01)
CPC G02F 1/13725 (2013.01) [G02F 1/133531 (2021.01); G02F 1/1337 (2013.01); G02F 1/13394 (2013.01); G02F 1/133302 (2021.01); G02F 2202/28 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An optical device, comprising:
a first outer substrate;
a second outer substrate;
a liquid crystal element film positioned between the first and second outer substrates;
a first polarizer positioned between the first outer substrate and the liquid crystal element film;
a second polarizer positioned between the second outer substrate and the liquid crystal element film; and
intermediate layers positioned between the first outer substrate and the liquid crystal element film and between the liquid crystal element film and the second outer substrate, respectively,
wherein the intermediate layers comprise intermediate layers which are positioned between the first polarizer and the liquid crystal element film and between the second polarizer and the liquid crystal element film, respectively, and each of the intermediate layers has a thickness of 380 μm or less, and
wherein a sum of the total thicknesses of the intermediate layers is 1,600 μm or more,
wherein the liquid crystal element film comprises:
a first base layer;
a second base layer;
a liquid crystal layer positioned between the first and second base layers;
a patterned spacer to maintain a distance between the first and second base layers;
a first conductive layer positioned on a liquid crystal facing-surface of the first base layer;
a second conductive layer positioned on a liquid crystal facing-surface of the second base layer; and
a pressure-sensitive adhesive layer positioned between the first conductive layer and the liquid crystal layer,
wherein the pressure-sensitive adhesive layer has a storage modulus of 10 MPa or less.