| 摘要 |
<p>A digital pen comprises a skeleton and a removable skin, the skeleton holding together in fixed relationship, an electric circuit, and a first acoustic transmitter, detached from said electric circuit, and configured to transmit acoustic signals, and the removable skin comprising a housing fitting over said skeleton, a digital pen system comprises said digital pen, a method of manufacturing differentiated digital pens comprises preparing identical elongated skeletons, inserting within a plurality of said elongated skeletons, an electric circuit, an acoustic transmitter, detached from said electric circuit, and configured to transmit acoustic signals, preparing a range of differentiated housings for said elongated skeletons, and selecting one of said housings from said range for respective ones of said plurality of elongated skeletons, fixing said selected housing onto said respective elongated skeleton, thereby to provide a range of differentiated digital pens from said identical skeletons.</p> |
