US 12,454,633 B2
Flexible device
Byung Su Park, Daejeon (KR); Hyun Cheol Kim, Daejeon (KR); and Hyon Gyu Park, Daejeon (KR)
Assigned to Xinmei Fontana Holding (Hong Kong) Limited, Hong Kong (CN)
Appl. No. 17/783,791
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Dec. 10, 2020, PCT No. PCT/KR2020/018038
§ 371(c)(1), (2) Date Jun. 9, 2022,
PCT Pub. No. WO2021/118249, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 10-2019-0164158 (KR), filed on Dec. 10, 2019; and application No. 10-2019-0167239 (KR), filed on Dec. 13, 2019.
Prior Publication US 2023/0026853 A1, Jan. 26, 2023
Int. Cl. C09J 133/10 (2006.01); B32B 5/14 (2006.01); B32B 7/12 (2006.01); C08F 220/18 (2006.01); C09J 7/10 (2018.01); C09J 7/38 (2018.01); C09J 133/08 (2006.01); C09J 133/12 (2006.01); C09J 7/20 (2018.01); C09J 7/25 (2018.01); C09J 7/40 (2018.01); C09J 11/00 (2006.01); C09J 11/06 (2006.01); G02F 1/1333 (2006.01); G06F 1/16 (2006.01); G09F 9/30 (2006.01); H10K 77/10 (2023.01); H10K 102/00 (2023.01)
CPC C09J 133/10 (2013.01) [B32B 5/142 (2013.01); B32B 5/147 (2013.01); B32B 7/12 (2013.01); C08F 220/18 (2013.01); C08F 220/1811 (2020.02); C08F 220/1812 (2020.02); C08F 220/1818 (2020.02); C09J 7/10 (2018.01); C09J 7/385 (2018.01); C09J 133/08 (2013.01); C09J 133/12 (2013.01); B32B 2307/412 (2013.01); B32B 2307/51 (2013.01); B32B 2307/54 (2013.01); B32B 2307/548 (2013.01); B32B 2307/704 (2013.01); B32B 2457/20 (2013.01); C09J 7/20 (2018.01); C09J 7/255 (2018.01); C09J 7/403 (2018.01); C09J 11/00 (2013.01); C09J 11/06 (2013.01); C09J 2203/318 (2013.01); C09J 2203/326 (2013.01); C09J 2301/124 (2020.08); C09J 2301/208 (2020.08); C09J 2301/21 (2020.08); C09J 2301/302 (2020.08); C09J 2301/312 (2020.08); C09J 2301/408 (2020.08); C09J 2301/414 (2020.08); C09J 2301/416 (2020.08); C09J 2433/00 (2013.01); C09J 2467/006 (2013.01); G02F 1/133305 (2013.01); G02F 2202/28 (2013.01); G06F 1/1652 (2013.01); G09F 9/301 (2013.01); H10K 77/111 (2023.02); H10K 2102/311 (2023.02); Y10T 428/24942 (2015.01); Y10T 428/24983 (2015.01); Y10T 428/2809 (2015.01); Y10T 428/2891 (2015.01)] 14 Claims
OG exemplary drawing
 
1. A flexible device, comprising:
a display panel configured to be foldable or rollable through one or more folding axes or rolling axes; and
a pressure-sensitive adhesive layer on one side or both sides of the display panel,
wherein the pressure-sensitive adhesive layer comprises a first region and a second region having different creep strain rates or storage elastic moduli from each other, and
wherein the second region of the pressure-sensitive adhesive layer overlaps the folding axis or the rolling axis,
wherein an absolute value of a difference in storage elastic moduli of the first and second regions according to Equation 5 below is 10% or more, and wherein an absolute value of a difference in peel forces of the first and second regions according to Equation 8 below is 40% or less:
DM60=100×(M60.1−M60.2)/M60.2  [Equation 5]
DPG=100×(PG.1−PG.2)/PG.2  [Equation 8]
wherein, D M60 is the difference in the storage elastic moduli, M 60.1 is a storage elastic modulus of the first region at 60° C., and M 60.2 is a storage elastic modulus of the second region at 60° C.; and D PG is the difference in the peel force, P G.1 is a peel force of the first region to a glass, and P G.2 is a peel force of the second region to a glass.