Electronic-ink label for a drug delivery device

An indication system for use in a drug delivery device, the indication system comprising:

• a housing;
• a moveable component configured to move with respect to the housing during operation of the drug delivery device;
• an electric circuit having an electrical property, the electric circuit comprising:
• an electrical component operatively coupled to the moveable component and configured to modify the electrical property based on a position of the moveable component, such that the electrical property of the electric circuit is an indication of the position of the moveable component, and
• an electric contact on an exterior of the housing;
• and
• an electronic-ink label configured to be disposed on the exterior of the housing, the electronic-ink label comprising:
• printed electronics arranged to be in electrical communication with the electric circuit via the electric contact and configured to display a visual indication related to the position of the moveable component in response to the electrical property of the electric circuit.

An electronic-ink label for use with a drug delivery device, the electronic-ink label comprising:

• an inner surface configured to be secured to an exterior of the drug delivery device, the inner surface comprising corresponding contacts arranged to be conductively connected with contacts on the exterior of the drug delivery device;
• and
• an outer surface comprising a display having a plurality of display elements each configured to switch from a first status to a second status,
• wherein a number of the plurality of display elements in the second status changes depending on an electrical property of an electric circuit of the drug delivery device that is conductively connected to the electric-ink label via the contacts,
• wherein the electrical property depends on an effective electrical length of the electric circuit that is conductively connected to the electronic-ink label, and
• wherein the number of the plurality of display elements being in the same status or being forced to switch status is proportional to the effective electrical length of the electric circuit.