| 摘要 |
PROBLEM TO BE SOLVED: To simplify sensitivity adjustment of a pressure sensitive element by beforehand storing dispersion in the pressure sensitive element in a dispersion data memory and correcting pressing information (common after touch informa tion) with the dispersion data whenever pressure occurs. SOLUTION: The dispersion of the single pressure sensitive element provided in a pressure detection circuit 14 to be used commonly for a key board 11 is stored beforehand in the dispersion data memory 15 as the dispersion rank data. When a key is operated, the common after touch information obtained by the pressure detection circuit 14 is corrected by a pressure correction means 16, and standardized common after touch information is obtained, and the necessity that the output of the pressure detection circuit 14 is adjusted according to the individual difference of the pressure sensitive element is eliminated. Further, the pressure correction means 16 can obtain the standardized common after touch information only by multiplying the common after touch information with a correction coefficient when the correction coefficient is stored beforehand according to the dispersion rank of the pressure sensitive element. |
