| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pen input device or the like to which no noise is inputted even in a noisy environment, in which not only a warning is issued but also a left pen can be easily discovered, for example, and which never erroneously position-input even in the operation at a dark place. SOLUTION: Concerning the pen input device equipped with a pen for preparing or indicating information to be inputted to information equipment with the tip of the pen, a microphone 4 is provided inside a pen 3. Further, a speaker is provided inside the pen 3. This pen input device is provided with a pen holder for housing the pen when the pen is not used and a pen detection button for detecting the state of housing the pen onto the pen holder and when no pen input is detected continuously longer than prescribed time and the pen housing state is not detected by the pen detection button, a warning sound or warning voice is outputted by the speaker. Further, a light emitting means is provided inside the pen 3.</p> |
