Patent ID: 8891337

Claim:
A digital day/night display device for a timepiece, comprising: an hours disc; ciphers from 1 to 12 representing hours distributed along a periphery of the hours disc, and realized such that light can pass either through the ciphers or through a portion of the hours disc surrounding the ciphers; a rotative day/night disc, located under the hours disc comprising a first zone and a second zone of different colors or shades; and a mechanism driving in rotation the hours disc and the day/night disc; wherein the first zone and the second zone of the day/night disc extend under the ciphers 1-12 of the hours disc, and the mechanism driving in rotation the hours disc and the day/night disc comprises a first means for driving the hours disc in a continuous way and at constant speed at a rate of two revolutions in twenty-four hours and a second means for intermittently driving the day/night disc at a rate of one revolution in twenty-four hours.