Drug delivery device mitigating dose measurement errors

A drug delivery device, comprising:

• a housing comprising one or more bridging contacts;
• a movable dial located at least partially within the housing and arranged to move relative to the one or more bridging contacts, the movable dial comprising a series of conductive strips on an exterior surface of the movable dial, wherein the one or more bridging contacts selectively connect and disconnect conductive strips of the series of conductive strips as the movable dial moves to provide alternating electrical signals;
• and
• at least one electronic component configured to:
• detect the alternating electrical signals,
• determine whether the alternating electrical signals are indicative of contact between conductive strips of the series of conductive strips and the one or more bridging contacts, and
• based on the alternating electrical signals, determine a medicament dosage programmed into the drug delivery device,
• wherein the at least one electronic component comprises at least one of a microcontroller, a comparator, and an analogue to digital converter.

A drug delivery device, comprising:

• a housing comprising one or more bridging contacts;
• a movable dial located at least partially within the housing and arranged to move relative to the one or more bridging contacts, the movable dial comprising a series of conductive strips on an exterior surface of the movable dial, wherein the one or more bridging contacts selectively connect and disconnect conductive strips of the series of conductive strips as the movable dial moves to provide alternating electrical signals;
• and
• at least one electronic component configured to:
• detect the alternating electrical signals,
• determine whether the alternating electrical signals are indicative of contact between conductive strips of the series of conductive strips and the one or more bridging contacts, and
• based on the alternating electrical signals, determine a medicament dosage programmed into the drug delivery device,
• wherein detecting the alternating electrical signal by the at least one electronic component comprises detecting a voltage at at least one of the series of conductive strips.

A drug delivery device, comprising:

• a housing comprising one or more bridging contacts;
• a movable dial located at least partially within the housing and arranged to move relative to the one or more bridging contacts, the movable dial comprising a series of conductive strips on an exterior surface of the movable dial, wherein the one or more bridging contacts selectively connect and disconnect conductive strips of the series of conductive strips as the movable dial moves to provide alternating electrical signals;
• and
• at least one electronic component configured to:
• detect the alternating electrical signals,
• determine whether the alternating electrical signals are indicative of contact between conductive strips of the series of conductive strips and the one or more bridging contacts, and
• based on the alternating electrical signals, determine a medicament dosage programmed into the drug delivery device,
• wherein the series of conductive strips comprise at least two sensor strips and at least two source strips.

A method of operating a drug delivery device, the drug delivery device comprising:

• a housing comprising one or more bridging contacts,
• a movable dial located at least partially within the housing and arranged to move relative to the one or more bridging contacts, the movable dial comprising a series of conductive strips on an exterior surface of the movable dial, wherein the one or more bridging contacts selectively connect and disconnect conductive strips of the series of conductive strips as the movable dial moves to provide alternating electrical signals, and
• at least one electronic component, the method comprising:
• detecting the alternating electrical signals, wherein the signals are digital signals;
• determining whether the alternating electrical signals are indicative of contact between conductive strips of the series of conductive strips and the one or more bridging contacts;
• and
• based on the alternating electrical signals, determining a medicament dosage programmed into the drug delivery device.

A method of operating a drug delivery device, the drug delivery device comprising:

• a housing comprising one or more bridging contacts;
• a movable dial located at least partially within the housing and arranged to move relative to the one or more bridging contacts, the movable dial comprising a series of conductive strips on an exterior surface of the movable dial, wherein the one or more bridging contacts selectively connect and disconnect conductive strips of the series of conductive strips as the movable dial moves to provide alternating electrical signals;
• and
• at least one electronic component, the method comprising:
• detecting the alternating electrical signals by detecting a voltage at at least one of the series of conductive strips,
• determining whether the alternating electrical signals are indicative of contact between conductive strips of the series of conductive strips and the one or more bridging contacts, and
• based on the alternating electrical signals, determining a medicament dosage programmed into the drug delivery device.