An intermittent display mechanism for a timepiece includes a mobile component in motion, an energy source for supplying a light emission source coupled with a light guide, and light emission control means. The light emission control means includes a flexible body bearing a flexible piezoelectric film or coating coated in an electrically insulating shell and attached to a fixed structure and including a distal zone overhanging with respect to the structure, arranged to interfere mechanically, at periodic or random times, with the mobile component during the travel thereof and move away from the rest position thereof before starting vibration of the flexible body and the piezoelectric film or coating, which constitutes an energy source, to convert the mechanical energy supplied by the mobile component into electrical energy supplied to the light emission source.