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EP 4 681 022 A1

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(43) Date of publication: 21.01.2026 Bulletin 2026/04 (21) Application number: 23748528.9 (22) Date of filing: 28.07.2023

(51) International Patent Classification (IPC):  G03B 15/05(2021.01) F21V 14/04(2006.01) F21V 7/04(2006.01) H04N 23/56(2023.01) (52) Cooperative Patent Classification (CPC): G03B 15/05; G03B 2215/051; G03B 2215/0585; F21V 7/041; F21V 14/04; H04N 23/56 (86) International application number: PCT/EP2023/071004 (87) International publication number: WO 2025/026530 (06.02.2025 Gazette 2025/06)

(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: KH MA MD TN (71) Applicant: Huawei Technologies Co., Ltd. Shenzhen, Guangdong 518129 (CN)	(72) Inventor: VIRTA, Markus 16440 Kista (SE) (74) Representative: MERH-IP Matias Erny Reichl Hoffmann Patentanwälte PartG mbB  Paul-Heyse-Straße 29 80336 München 80336 München (DE)