abstract |
The present disclosure relates to medicament injection devices. According to a first aspect, the present disclosure describes an injection device comprising: a movable dose programming member comprising a rotary encoder system with a predefined angular periodicity; a sensor assembly, the sensor The assembly includes a first optical sensor configured to detect movement of the movable dose programming member relative to the sensor assembly during dispensing of a medicament, wherein the first optical sensor is configured to A frequency operates in a gated sampling mode; a second optical sensor configured to detect movement of the rotary encoder system relative to the second optical sensor, wherein the second optical sensor is configured to operate in a gated sampling mode at a second frequency lower than the first frequency; and a processor assembly configured to determine administration by the injection device based on the detected movement dose of the drug. |