Computer input keyboard in which signal switches associated with the keys have auxiliary level resistances, in addition to a main level resistance, which are used to suppress unintentional or ghost key pressing

摘要

Keyboard has at least one signal switch (220a-d) that is electrically connected with an auxiliary level resistance (R2) in addition to a main level resistance (R1). These auxiliary level resistances are used to prevent ghost key pressing where the key pressure is slightly reduced in comparison with intended key pressing.