| 摘要 |
<p>PURPOSE:To stabilize the electromagnetic coupling between a tablet and a cursor, by providing an electrostatic attracting mechanism on the tablet to fix a recording medium, where analog patterns are recorded, stably. CONSTITUTION:Conductive patterns 41 and 42 for electrostatic attraction are formed on an insulating plate 20 such as a print board, and patterns 41 are arranged in a shape like teeth of a comb on the insulating substrate 20 in parallel with conductor loops 21 so that conductor loops 21 are interposed between patterns 41 along the logitudinal direction, and one ends of patterns 41 are connected to an output terminal (a) of a driving circuit 43. Patterns 42 are formed to a shape like teeth of a comb on the insulating plate 20 along the longitudinal direction so that loops 21 are surrounded with patterns 42, and one ends of patterns 42 are connected to the other output terminal (b) of the circuit 43. One ends of loops 21 are connected to a switch circuit 22. A prescribed potential difference is applied across patterns 41 and 42 by the circuit 43 to generate electric field between patterns 41 and 42, and a recording medium is attracted electrostatically to an optional position on the tablet. Thus, an even small-sized recording medium is fixed stably, and the operation of a digitizer is stabilized.</p> |
