The timepiece movement is provided with an analog device for displaying information whose value varies periodically or intermittently, this analog display device including, on the one hand, an indicator provided with a first toothing, and on the other hand, a mechanism for the periodic or intermittent driving of the indicator. Then, by applying thermal oxidation treatment to the active layer, the impurity element is subjected to redistribution, and the concentration of the impurity element in the principal surface of the active layer is minimized. The computing device can also capture and analyze input events which represent a hand that is close to the display surface, but not making physical contact with the display surface. The lens system takes the maximum focal length state when the distance is minimum and the minimum focal length state when the distance is maximum.