Browse Prior Art Database

Pressure-Sensitive Computer Keyboard Keys

IP.com Disclosure Number: IPCOM000116533D
Original Publication Date: 1995-Sep-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Alpert, AI: AUTHOR [+3]

Abstract

Disclosed is the concept of pressure-sensitive computer keyboard keys. The required set of a computer keyboard's keys can be made sensitive to the degree of pressure applied by the user's fingers.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 80% of the total text.

Pressure-Sensitive Computer Keyboard Keys

      Disclosed is the concept of pressure-sensitive computer
keyboard keys.  The required set of a computer keyboard's keys can be
made sensitive to the degree of pressure applied by the user's
fingers.

A number of possible electronic/mechanical implementations may be
used:
  o  A spring, with detection based on how many spring coils are
      touching the inner surface of the device,
  o  A pressure-sensitive electric conductivity change detector,
  o  etc.
  Computer keyboard key pressure-sensitivity may be implemented in
two
ways:
  o  Complete - A computer keyboard key is pressure-sensitive in all
      positions from top (not pressed) to bottom (completely
pressed).
  o  Partial - A computer keyboard key is pressure-sensitive only
when
      completely depressed (bottom position).  Thus, a key operates
      just like a normal non-pressure-sensitive key except when the
      typist depresses it to the bottom position.

      The latter computer keyboard key pressure-sensitivity (partial
pressure-sensitivity) provides physical compatibility with existing
non-pressure-sensitive computer keyboard keys.

      For a computer keyboard, it may be practical to limit the
number of pressure-sensitive keys by restricting pressure-sensitivity
to only keys performing specific functions.

      As a result, in addition to the information that is conducted
by a keyboard presenting a key-...