Patent ID: 7196973

Claim:
A method for displaying a cycle of successive images of the moon during a lunation in a circular aperture of a dial by means of a mobile indicator arranged behind the aperture and having, on the face thereof appearing in the aperture, lines of separation of different shapes between light fields and dark fields, wherein: the display cycle during a lunation is divided into several successive parts at least certain of which comprise several positions of the mobile indicator, which correspond to several successive images formed with different successive positions of the same line of separation visible in the aperture, in order to pass from one part of the cycle to the next part, the mobile indicator is subjected to a primary movement, able to bring a line of separation that was not yet visible or a field without any line of separation into the aperture, and in each of the parts of the cycle which comprise successive positions of a same line of separation, the mobile indicator is subjected to at least one secondary movement smaller than the primary movements, to make the line of separation pass from one of said successive positions to the next.