Patent ID: 6868046
Filing Date: 2005-03-15
Classification: G04C,G04G

Abstract:
1. An electronic watch including: a case containing display means with hands and provided with a crystal made of dielectric material arranged in front of said hands, manual control means comprising capacitive keys each provided with at least a transparent electrode arranged on the inner face of the crystal and forming a first plate of capacitive sensor whose second plate is formed by placing a finger of the person wearing the watch on an external face of the crystal selectively opposite at least one of said capacitive keys, said control means further including a detection device for detecting capacitance variations in said sensor and consequently generating control signals in the watch, and means for capacitive detection of a position of at least one of said hands, on the basis of variations in capacitance between said hand and at least one fixed electrode, wherein said fixed electrode is one of said transparent electrodes of the capacitive keys, wherein said hand is electrically connected to a fixed potential and wherein said hand position detection is achieved by means of said detection device associated with the capacitive keys.