| 摘要 |
<p>A hand-controlled mechanism is described for producing signals to move the position of a cursor in a computer display. The mechanism includes a shaft (12) with an elongated axis and a cylindrical member (10) mounted coaxially around a portion of the shaft (12), the member being both rotatable about and slidable along the elongated axis. The cylindrical member (10), has sets of encoding markings (18,20) directly emplaced thereof, which markings are parallel to and transverse to the elongated axis of the shaft (12). Optical sensing devices (60,62,64,66) are provided and are responsive to the movement of the sets of encoding markings to provide signals indicating both rotational and axial movement of the cylindrical member. Decoder circuits (92) are responsive to those signals to produce additional outputs which may be used to move the position of the display cursor.</p> |
