Electronic watch with capacitive switches on its cover glass

摘要

There is a circular range of buttons defined by transparent electrodes (21-32) disposed on the interior face of the glass cover (5) of the watch. The electrodes are attached to a detecting to a detecting device through a multiplexer. The buttons are activated through the electrodes at the touch of a finger (38) on the glass. There are also means to detect at least one of the hands of the watch (8,9) though the same detecting device by using the electrodes.