Abstract

Representatively using force sensing resistors as key switch elements, keys on a computer keyboard are each provided with pluralities of different keystroke output function signals which may be selectively varied in response to simply altering the user keystroke force imposed on the key. In addition to being provided with a default key force range/output signal correlation, the keyboard may be programmed by the user to customize the key depression force ranges associated with selected different keystroke output signals. Representatively illustrated additional uses of this key force/output signal correlation capability include a key force-based typing correction mode and a combination character and key force sequence-based user password access system. To further expand the individual key functionality of the keyboard, a combination of sensed key depression force and duration is used to generate an additional keystroke output function signal for a given key.