(19)

(11)

EP 4 771 445 A1

(12)

(43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24772823.1 (22) Date of filing: 28.08.2024

(51) International Patent Classification (IPC):  G02F 1/167(2019.01) H10N 30/045(2023.01) (52) Cooperative Patent Classification (CPC): G02F 1/167; G02F 2202/28; H10N 30/045; B42D 25/36; H10N 30/098 (86) International application number: PCT/US2024/044208 (87) International publication number: WO 2025/049590 (06.03.2025 Gazette 2025/10)

(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: 29.08.2023 US 202363579375 P 29.08.2023 US 202363579377 P (71) Applicant: E Ink Corporation Billerica, MA 01821 (US)	(72) Inventors: GU, Haiyan Billerica, Massachusetts 01821-4165 (US) MATUS, Yuriy Borisovich Billerica, Massachusetts 01821-4165 (US) ZANG, Hongmei Billerica, Massachusetts 01821-4165 (US) (74) Representative: Kilburn & Strode LLP  Lacon London 84 Theobalds Road Holborn London WC1X 8NL London WC1X 8NL (GB)