| 摘要 |
<p>An alphanumeric keyboard for data input to a host computer is provided with at least one functional component in addition to the normal key functions. The additional functioonal component is powered from the host computer via a digital data connector, for example a USB or IEEE 1394 connector. Specific finctional components disclosed include a microphone with timed mutingfunction, echo cancellation, a card reader, a wireless data receiver, and a contactless induction charger.</p> |
