Patent ID: 7839726

Claim:
A timepiece including: (a) a case closed by a crystal, and inside the case there is housed an optical device for forming at least one complete figurative image through the crystal, wherein the optical device includes i. at least one optical waveguide made of a solid material and having two large faces and at least one lateral face; and ii. at least one light source that emits light inside the optical waveguide, wherein the light emitted by the light source cooperates with optical extractors that are arranged on one of the two large faces of the optical waveguide to form the complete figurative image, wherein the complete figurative image includes a first figurative image and a second figurative image, wherein the light source is arranged in proximity to the at least one lateral face and the light source is oriented in a predefined direction to emit light inside the optical waveguide, wherein each optical extractor has predefined geometrical features, including at least one reflective or refractive surface, so that a set of light beams emitted by the light source are reflected or refracted, respectively, by the optical extractors to form a light beam network that generates the complete figurative image, and wherein the crystal includes an edge and an inner face, wherein the optical waveguide is arranged on the inner face of the crystal, wherein the at least one light source of the timepiece includes a first light source and at least a second light source arranged for emitting light inside the optical waveguide along a different direction from an emission direction of the first light source; and (b) a dial housed inside the case, wherein the at least one optical waveguide is disposed between the dial and the crystal, and the optical waveguide includes a first group of optical extractors corresponding to the first figurative image and a second group of optical extractors corresponding to the second figurative image; and (c) means for driving the optical waveguide in rotation so that the first group of optical extractors cooperate alternately with the first light source and the second light source.