(19)

(11)

EP 4 681 189 A1

(12)

(43) Date of publication: 21.01.2026 Bulletin 2026/04 (21) Application number: 24708839.6 (22) Date of filing: 07.03.2024

(51) International Patent Classification (IPC):  G08B 21/04(2006.01) (52) Cooperative Patent Classification (CPC): G08B 21/043; G08B 21/0446 (86) International application number: PCT/EP2024/055975 (87) International publication number: WO 2024/188789 (19.09.2024 Gazette 2024/38)

(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: 13.03.2023 WO PCT/CN2023/081164 31.05.2023 EP 23176269 (71) Applicant: Signify Holding B.V. 5656 AE Eindhoven (NL)	(72) Inventors: WEI, Ying Dong 5656 AE Eindhoven (NL) WANG, Gang 5656 AE Eindhoven (NL) LI, Sufei 5656 AE Eindhoven (NL) WEI, Gongming 5656 AE Eindhoven (NL) QIU, Jia Long 5656 AE Eindhoven (NL) (74) Representative: Verweij, Petronella Daniëlle  Signify Netherlands B.V. Intellectual Property High Tech Campus 7 5656 AE Eindhoven 5656 AE Eindhoven (NL)