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Graphical user interface cursor positioning device having a negative inertia transfer function

  • US 5,570,111 A
  • Filed: 10/03/1994
  • Issued: 10/29/1996
  • Est. Priority Date: 10/03/1994
  • Status: Expired due to Term
First Claim
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1. An apparatus, for use in a graphical user interface of a processing system, for directing the positioning and movement of a symbol displayed on a display screen of the processing system, the apparatus comprising:

  • a transducer for translating an input activity of a user into an input parameter; and

    a transfer function unit, coupled to receive the input parameter, for producing a symbol movement signal whose value, responsive to the input parameter, represents an amplification of changes of value of the input parameter, the amplification having the same sign as the changes of value of the input parameter, the amplification including non-linear scaling;

    whereby the amplification of changes of value of the input parameter is reduced for low magnitude of the input parameter, representative of user activity to make small cursor movements; and

    whereby movement of the symbol on the screen is controlled based on the symbol movement signal.

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