Method for direct and visual determination of optimal solution for electronic device with response to two or more orthogonal inputs

A method of determining an optimal solution for a piezoresistive force sensor comprising:

• generating a force-induced stress (FIS) conditional plot of the piezoresistive force sensor based on a first criterion, wherein an FIS level within the FIS conditional plot meets the first criterion when a force input is applied to the piezoresistive force sensor;
• generating a temperature-induced stress (TIS) conditional plot of the piezoresistive force sensor based on a second criterion, wherein:
• a TIS level within the TIS conditional plot meets the second criterion when a temperature increase is applied to the piezoresistive force sensor;
• and
• generating the TIS conditional plot is independent from generating the FIS conditional plot;
• and
• generating an intersection plot by overlaying the FIS conditional plot with the TIS conditional plot, wherein the intersection plot indicates whether the piezoresistive force sensor has one or more solution regions that satisfy both the first criterion and the second criterion.

A communication device comprising:

• a control system;
• a baseband processor;
• user interface circuitry configured to communicate with the baseband processor and/or the control system;
• and
• a physical interface component including at least one piezoresistive sensor, which is configured to measure external loads to the physical interface component and to transfer electrical signals to the user interface circuitry corresponding to the external loads, such that the electrical signals induced by the external loads are capable of being processed in the baseband processor and/or the control system, wherein measuring the external loads comprises:
• generating a first conditional plot of the at least one piezoresistive sensor, based on a first criterion, wherein a first characteristic within the first conditional plot meets the first criterion when a first load of the external loads is applied to the at least one piezoresistive sensor;
• generating a second conditional plot of the at least one piezoresistive sensor based on a second criterion, wherein:
• a second characteristic within the second conditional plot meets the second criterion when a second load of the external loads is applied to the at least one piezoresistive sensor;
• the second criterion is different from the first criterion;
• and
• generating the second conditional plot is independent from generating the first conditional plot;
• and
• generating an intersection plot by overlaying the first conditional plot with the second conditional plot, wherein the intersection plot indicates whether the at least one piezoresistive sensor has one or more solution regions that satisfy both the first criterion and the second criterion.