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(11)

EP 4 244 485 A1

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(43) Date of publication: 20.09.2023 Bulletin 2023/38 (21) Application number: 21700578.4 (22) Date of filing: 14.01.2021

(51) International Patent Classification (IPC):  F03G 7/06(2006.01) H01L 41/09(2006.01) G02B 7/08(2021.01) (52) Cooperative Patent Classification (CPC): F03G 7/0614; F03G 7/0616; F03G 7/0631; G03B 9/02; G03B 9/06 (86) International application number: PCT/EP2021/050654 (87) International publication number: WO 2022/152375 (21.07.2022 Gazette 2022/29)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (71) Applicant: Huawei Technologies Co., Ltd. Shenzhen, Guangdong 518129 (CN)	(72) Inventor: EROMAKI, Marko 16440 Kista (SE) (74) Representative: Isarpatent  Patent- und Rechtsanwälte Barth Charles Hassa Peckmann & Partner mbB Friedrichstrasse 31 80801 München 80801 München (DE)