| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electronic keyboard instrument which increases a scanning speed of a key operation without increasing a clock frequency. <P>SOLUTION: The instrument is assembled as an 88 key model, a whole key area is divided into three areas of first to third areas (10A to 10C), corresponding to it, a circuit board is also divided into three circuit boards of first to third circuit boards (20A to 20C), and are installed independently, and the numbers of corresponding keyboard operating elements 1 are '28', '30', and '30'. Each circuit board from 20A to 20C is provided corresponding to each keyboard operating element 1 with operation signal output parts from 29A to 29C which output a signal indicating an operating state of the keyboard operating elements 1, and further with scan parts from the first to the third from 21A to 21C. Each scanning part from 21A to 21C detects an operating state of a touch key by scanning the operation signal output parts from 29A to 29C in each associated key area. <P>COPYRIGHT: (C)2003,JPO |
