| 摘要 |
Human Input Device (HID) 20 for portable computing device 10 comprising pressure sensitive digit pad 20 having a plurality of transducers (sensors) 30 at different radial positions ( for example an annular ring) for detecting displacements of a digit in contact with the digit-pad (finger pad or thumb pad with dimensions substantially of average user's fingertip). The pad comprises pressure sensitive area 22 comprising touch or pressure sensitive matrix of sensors. The pressure transducers comprise one or more of strain gauge (with individual gauges bonded together), capacitive or resistive sensor. The transducers can detect infinitesimal movements of users digit corresponding to shapes of handwritten letters. Other inputs are cursor, scroll, and zoom. The HID can be integrated into an area of a touch-screen. The HID can be a recessed circular area on portable devices or flush with a surface of the devices and identified via tactile indicia (rough or textured surface). |
