Systems and methods for implementing pressure sensitive keyboards
First Claim
1. A keyboard system, comprising:
- one or more pressure sensitive keys configured to provide analog output signals corresponding to each given one of the pressure sensitive keys that is representative of pressure applied to the given key; and
pressure sensing interface circuitry coupled to receive the analog output signal from each given one of the pressure sensitive keys, the pressure-sensing digital output circuitry being configured to provide a separate alternating open and short digital output signal based thereupon having a frequency that is representative of pressure applied to the corresponding given one of the pressure sensitive keys.
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Abstract
Systems and methods for implementing pressure sensitive keys to produce digital signals that emulate actuation of conventional “momentary on” digital keys of a conventional keyboard. The pressure sensitive keys may be implemented to generate an alternating open/short digital signal representative of the amount of pressure applied to a given key at any given time. The open/short digital signal may be supplied as a signal representative of applied key pressure to a legacy keyboard key matrix and controller or other processing device of an information handling system that is configured to measure keyboard input based on “momentary-on” digital signals.
259 Citations
21 Claims
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1. A keyboard system, comprising:
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one or more pressure sensitive keys configured to provide analog output signals corresponding to each given one of the pressure sensitive keys that is representative of pressure applied to the given key; and pressure sensing interface circuitry coupled to receive the analog output signal from each given one of the pressure sensitive keys, the pressure-sensing digital output circuitry being configured to provide a separate alternating open and short digital output signal based thereupon having a frequency that is representative of pressure applied to the corresponding given one of the pressure sensitive keys. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of accepting user input from a keyboard, comprising:
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providing one or more pressure sensitive keys; producing an analog output signal for each given one of the pressure sensitive keys when depressed by a user, the analog output signals being representative of pressure applied to the given pressure sensitive key by the user; and providing a separate alternating open and short (open/short) digital output signal based upon the analog output signal, the alternating open and short (open/short) digital output signals having a frequency that is representative of the pressure applied to the given pressure sensitive key by the user. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification