Patent ID: 7719515

Claim:
An input device including an input receiving panel for receiving an external input and input means for enabling an input on the input receiving panel, the input device sensing an input by means of capacitive coupling between an electrode on the input receiving panel and an electrode on the input means, the input device comprising: first signal supply means for supplying an input sensing signal to a first one of the electrodes; signal detecting means for detecting a signal generated in the other, second electrode; and input sensing means for comparing the input sensing signal with the signal detected by the signal detecting means and sensing an input based on a result of the comparison, wherein: the input sensing signal represents an input-sensing digital code; and the input sensing means includes: code detecting means for detecting a digital code from the signal detected by the signal detecting means; and determining means for determining that an input has been made if the input-sensing digital code matches with the digital code detected by the code detecting means.