Key touch adjusting method and device

A device for providing a key-force profile characteristic for a key top which is displaced by an externally applied depressing force, said device comprising:

• (a) position detection means for detecting the position of the key top and outputting positional data corresponding to the displacement of the key top;
• (b) force generation means for applying a resistive force to the key top;
• (c) force setting means for converting the positional data into a resistive force value in accordance with a predetermined relationship between the resistive force value and the positional data;
• and
• (d) driving means for driving the force generation means in accordance with the resistive force value set by the force setting means.

A device for realizing a key-force profile characteristic in a keyboard including a plurality of key tops each of which is displaced by an externally applied depressing force, comprising:

• (a) a plurality of position detection means connected to and corresponding to the key tops, respectively, each of the position detection means detecting the position of the corresponding key top and generating corresponding positional data;
• (b) a plurality of force generation means corresponding to the key tops, respectively, each for respectively applying a resistive force to the corresponding key top;
• (c) force setting means for receiving the plurality of positional data corresponding to each of the key tops and converting the positional data into a plurality of resistive force values respectively in accordance with a predetermined relationship between the resistive force values and the plurality of positional data;
• and
• (d) a plurality of driving means corresponding to the force generation means, respectively, each for respectively driving the corresponding force generation means in accordance with the resistive force value set by the force setting means.

A method of providing a key force profile characteristic for a key top which is displaced by an externally applied depressing force, said method comprising the steps of:

• (a) setting a table comprising a plurality of resistive force values and corresponding positional data each having one to one correspondence to a plurality of predetermined positions of the key top;
• (b) detecting the position of the key top and generating corresponding positional data;
• (c) converting the positional data into a resistive force value with reference to the table set in step (a);
• and
• (d) applying to the key top a resistive force controlled in accordance with the resistive force value obtained in step (c).