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Controller for improved computer pointing devices

  • US 5,764,219 A
  • Filed: 12/14/1995
  • Issued: 06/09/1998
  • Est. Priority Date: 09/25/1992
  • Status: Expired due to Term
First Claim
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1. A method of controlling the velocity of a cursor on a video screen based on the force applied on a user-controlled pointing device, said method comprising the following steps:

  • (a) maintaining the velocity of said cursor at zero when a first predetermined range of forces is applied to said pointing device;

    (b) maintaining the velocity of said cursor at a first constant value when a second predetermined range of forces is applied to said pointing device, said second predetermined range of forces being greater in magnitude than said first predetermined range of forces;

    (c) allowing the velocity of said cursor to vary with the applied input force according to a parabolic-sigmoid transfer function when a third predetermined range of forces is applied to said pointing device, said third predetermined range of forces being greater in magnitude than said second predetermined range of forces;

    (d) maintaining the velocity of said cursor at a second constant value, said second constant value being greater than said first constant value, when a fourth predetermined range of forces is applied to said pointing device, said fourth predetermined range of forces being greater in magnitude than said third predetermined range of forces; and

    (e) allowing the velocity of said cursor to vary with the applied input force according to a substantially linear transfer function with a slope greater than unity when a fifth range of input forces is applied to said pointing device, said fifth range of input forces being greater is magnitude than said fourth predetermined range of forces.

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