(19)

(11)

EP 4 817 381 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24805377.9 (22) Date of filing: 30.10.2024

(51) International Patent Classification (IPC):  H10K 77/10(2023.01) F21S 43/145(2018.01) H10K 50/84(2023.01) F21S 43/19(2018.01) (52) Cooperative Patent Classification (CPC): F21S 43/145; F21S 43/195; H10K 77/10; H10K 50/841; B32B 2605/08; B32B 2605/00; B32B 17/10; B32B 2457/00; B32B 1/00 (86) International application number: PCT/US2024/053607 (87) International publication number: WO 2025/117121 (05.06.2025 Gazette 2025/23)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 30.11.2023 US 202363604320 P (71) Applicant: Corning Incorporated Corning, New York 14831 (US)	(72) Inventors: KONG, Bokyung Hwasung-city Gyeonggi-do 18445 (KR) LIM, Sung Jun Asan-si Chungcheongnam-do 31493 (KR) (74) Representative: Elkington and Fife LLP  Prospect House 8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)