Process for determining the activation of at least one key of a multi-key device

摘要

The invention relates to a process for determining the activation of at least one key of a multi-key device. The multi-key device comprises a plurality of keys K1 to Kn and a plurality of force sensors C1 to Cn, each force sensor C1 to Cn being associated respectively with a key K1 to Kn and able to provide a value representing a force which is applied to it. The process is characterized by the fact that it comprises the steps: obtaining values F′1 to F′n representing the force applied to each of the force sensors C1 to Cn; providing transmission rate values of a pressing force between the keys; removing the contribution of each of the force values F′1 to F′n from the pressing force transmitted between the keys using the transmission rate values provided; and determining values F1 to Fn representing the pressing force which has been applied by the user to the keys K1 to Kn.

主权项

1. A process for determining the activation of at least one key of a multi-key device, the multi-key device comprising a plurality of keys K1 to Kn, where n is an integer number of keys, and a plurality of force sensors C1 to Cn, each force sensor C1 to Cn being associated respectively with one of the plurality of keys K1 to Kn, the process comprising the steps of:
obtaining values F′1 to F′n, each of the values representing a force applied to each of the force sensors C1 to Cn, respectively; providing transmission rate values (Tij) that are measured values or values calculated theoretically by digital simulation indicative of a pressing force transmitted between each of the plurality of keys, where i and j are integers indicative of a portion of the pressing force transmitted from a first key Kj to a second key Ki when the first key Kj is pressed for j=1 to n and i=1 to n; removing the contribution of each of the force values F′1 to F′n emanating from the pressing force transmitted between each of the plurality of keys by using the transmission rate values (Tij) provided; and determining values F1 to Fn representing the pressing force which has been applied by a user to the plurality of keys K1 to Kn, wherein the transmission rate values Tij are included in a transmission rate matrix (T) having the form: (T11…T1⁢n⋮⋱⋮Tn⁢⁢1…Tnn) and the values F1 to Fn representing the pressing force applied by the user to each of the keys of the multi-key device are determined using the following formula in which the inverse of the transmission rate matrix (T−1) is multiplied by a vector of the values F′1 to F′n representing the force applied to the force sensors C1 to Cn;(F1⋮Fn)=(T11…T1⁢n⋮⋱⋮Tn⁢⁢1…Tnn)-1·(F1′⋮Fn′), wherein the transmission rate values Tij are fixed at zero for keys which are separated by a distance greater than a predetermined distance.