Method of obtaining a second function from keys on a keyboard using pressure differentiation
May 9, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPressure sensitive switch structure Cursor control Keyboard system with variable automatic repeat capability Method and apparatus for character generation Pressure-sensitive element Touch control apparatus for electronic keyboard instrument Method and apparatus for sensing activity for a keyboard and the like Touch dynamics signal generator for electronic musical instruments Key-touch sensor and method of manufacture Method of and apparatus for improved capacitive displacement and pressure sensing including for electronic musical instruments InventorsApplicationNo. 647098 filed on 05/09/1996US Classes:341/22, Including keyboard or keypad700/84KeyboardExaminersPrimary: Hofsass, JefferyAssistant: Wong, Albert K. Attorney, Agent or FirmInternational ClassG06F 003/14AbstractA method of obtaining a second function from keys on a standard QWERTY configured computer keyboard that have only a first function when struck individually is disclosed. First, the force applied by the user on the keyboard is measured and detected during a first period of time, and the normal level of force applied by the user is determined. Next, a second function actuating force which is greater than the normal force applied by the user is selected, and the force applied by the user on a keyboard during a second period of time is measured and detected. It is then determined whether the force applied by the user during the second period of time is greater than the second function actuating force, and if so, a computer operatively coupled to the keyboard is caused to perform a second function associated with the key. Otherwise, the computer performs the first function associated with the key.Other References
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