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US 2018/0284491 A1Published application
External element with temperature sensor
AssigneeThe Swatch Group Research and Development Ltd
InventorNicolas FRANCOIS
Life of this patent
Estimating the term…
Abstract
A thermochromic element including a thermochromic layer including a binder and a thermochromic pigment chosen to react at a specific temperature so that the pigment passes from a first color to a second color when the specific temperature is reached. The thermochromic layer coats a thermally conductive layer, and is protected by an optically transparent layer that protects it from chemical and physical degradation.
Claims17
1-17. (canceled)
An external element of a timepiece comprising:
- a supporting structure made of a first material;
- at least one device that reacts to temperature variations, wherein the device that reacts to temperature variations includes at least one thermochromic element that includes a thermochromic layer that includes a binder and a thermochromic pigment chosen to react at a specific temperature so that the pigment passes from a first color to a second color when the specific temperature is reached;
- wherein the thermochromic element further includes a carrier layer on which the thermochromic layer is deposited and a protective layer that is resistant to ultraviolet radiation and that covers the thermochromic layer and the carrier layer.
Dependencies are inferred from the claim text.