| 摘要 |
A capacitive touch-enabled printed article, such as a poster or magazine, is disclosed. The printed article comprises a substrate, at least two conductive pads disposed on the substrate, the at least two conductive pads including first and second conductive pads, a controller including a capacitive sensor input terminal and a ground terminal connected to the first and second pads respectively and a removable conductive strip bridging the first and second conductive pads. The controller is operable in a low- power state and a high-power state. In the relatively low-power state, the controller is configured to measure capacitance of the first conductive pad at intervals and to compare the capacitance with a predetermined threshold. The controller is configured, in response to determining that the capacitance is greater than the predetermined threshold, to continue in the low-power state and, in response to determining that capacitance is less than the predetermined threshold, to switch to the high-power state. |
