Display correction circuit for electronic timepiece - has pulse generator providing correction pulses of variable frequency

摘要

The display correction circuit is used for an electronic clock or watch, with a frequency divider, a counter network and a fluidci crystal digital display. It employs a pulse generator which supplies clock pulses with a variable frequency for correcting the time display. The pulse generator consists of a rotating pulse wheel (30), which has alternate insulating and contact zones (31a, 32) around its periphery, which is contacted by a contact spring (34), providing the pulses as it alternately contacts the insulating and contact zones (31a, 32). A ratchet wheel (35) is fixed to the pulse wheel (30) and is acted on by a ratchet spring (36). A selector switch in the drive circuit for the pulse wheel (30), selects forwards or reverse correction of the time display.