Electronic clock

Abstract

When an external switch means (1) is operated, a setting means (4) receives an output signal G1 therefrom and outputs setting signals S for varying the internal resistance of an adjusting means (5). When the internal resistance of the adjusting means (5) is varied, the potential (voltage value) at point A of the input value to a sensing means (6) is varied because it is the product of the generation quantity (current) of a power generating means (11) and the internal resistance. When the potential at point A exceeds a threshold value (H), the sensing means (6) outputs a sensing signal K of L level. When the sensing signal K of L level is outputted, the operation of the electronic timepiece changes to a power save mode where the drive of the second hand is stopped, for example. Thus the operation of the electronic timepiece changes to a power save mode when the power generation level of the power generating means (11) is equal to or lower than a specified level. Illumination by external light in the power save mode can be made constant even if the transmittance of the dial is different by adjusting the resistance of the adjusting means (5).

Dependencies are inferred from the claim text.