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US 10,859,978 B2Granted
Luminous display device
AssigneeThe Swatch Group Research and Development Ltd
InventorPierpasquale Tortora
Life of this patent
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Abstract
The present invention concerns a holographic display device incorporated in a timepiece device comprising at least one movable hand, having a light source at its peripheral end, and a watch glass comprising at least one hologram at its periphery, said light source being arranged on the hand so that it reconstructs said hologram when it moves into a predetermined angular sector.
Claims9
A watch, comprising:
- a holographic display device comprising a movable hour hand having a first light source mounted at a peripheral end of the hour hand and a movable minute hand having a second light source mounted at a peripheral end of the minute hand;
- and
- a watch glass comprising hour symbol holograms at a first circumference and minute symbol holograms at a second circumference, said first light source being arranged on the hour hand so that it successively reconstructs said hour symbol holograms when the hour hand moves into a first predetermined angular sector of the glass and said second light source being arranged on the minute hand so that it successively reconstructs said minute symbol holograms when the minute hand moves into a second predetermined angular sector of the glass.
Dependencies are inferred from the claim text.