Timepiece dial

US11971686B2 · kind B2 · utility

Assignee

• The Swatch Group Research and Development Ltd · CH

Inventors

• Agnes Marlot Doerr · Neuchâtel, CH
• Nicolas Francois · Neuchâtel, CH
• Alexandros Mouskeftaras · Marseilles, FR
• Michel Willemin · Prêles, CH
• Jean-Claude Martin · Neuchâtel, CH
• Carole Govaerts · Les Bioux, CH

Key dates

• Filing date: Nov 18, 2019
• Grant date: Apr 30, 2024
• Expiry date: Oct 4, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G04B19/12
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A dial, and timepiece including the dial, including a mother-of-pearl wafer partially covering a support member, and a decorative element arranged on a reverse of the wafer, the decorative element being visible on an obverse of the wafer when subjected to a stimulus and invisible on the obverse of the wafer in the absence of the stimulus. The decorative element has a first empty area on a reverse of the wafer, and a second empty area on the obverse of the wafer, facing the first empty area. A colour compensation layer is deposited on the first empty area or the second empty area, the colour being selected such that the difference in colour ΔE in the CIE Lab colour space between the colour compensation layer and the decorative element in the absence of said stimulus, perceived by a user observing the obverse of the wafer, is less than 3.