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EP 4 816 731 A1

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(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 25796494.0 (22) Date of filing: 24.10.2025

(51) International Patent Classification (IPC):  F21V 21/30(2006.01) F21S 4/28(2016.01) F21Y 115/10(2016.01) F21V 21/35(2006.01) F21W 131/405(2006.01) (52) Cooperative Patent Classification (CPC): F21W 2131/405; F21Y 2115/10; F21V 21/35; F21V 21/30; F21S 4/28 (86) International application number: PCT/EP2025/080886 (87) International publication number: WO 2026/109253 (28.05.2026 Gazette 2026/22)

(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 LA MA MD TN (30) Priority: 20.11.2024 CN 202411666413 (71) Applicants: Self Electronics Co., Ltd. Ningbo City, Zhejiang 315103 (CN) SELF ELECTRONICS Germany GmbH 51149 Köln (DE)	(72) Inventors: YANG, Jun Ningbo, Zhejiang 315103 (CN) HE, Zuping Ningbo, Zhejiang 315103 (CN) (74) Representative: 2K Patent Partnerschaft mbB  Hamburger Allee 26-28 60486 Frankfurt am Main 60486 Frankfurt am Main (DE)