Touch-pad digital computer pointing-device

  • US 5,856,822 A
  • Filed: 10/27/1995
  • Issued: 01/05/1999
  • Est. Priority Date: 10/27/1995
  • Status: Expired due to Term
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First Claim
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1. A touch-pad for controlling a position of a cursor appearing on a display screen of a digital computer, the touch-pad comprising:

  • an active area that responds to finger contact thereto;

    finger contact sensing device that is coupled to said active area for sensing a response of said active area to a finger contact, wherein said finger contact sensing device;

    senses a velocity at which a finger contacting the touch-pad moves across said active area, the touch-pad responding to a finger contact velocity which exceeds a pre-established threshold by altering a characteristic of data subsequently transmitted from the touch-pad to the digital computer in response to finger contact with said active area; and

    also senses a direction at which a finger contact to the touch-pad moves across said active area, the touch-pad after sensing a finger contact velocity which exceeds the pre-established threshold altering the characteristic of transmitted data so the cursor continues moving across the display screen of the digital computer in a direction fixed by an initial direction of finger contact movement across the active area even if such contact subsequently becomes stationary; and

    computer port interface means that is coupled to said finger contact sensing device and that is responsive to finger contact with said active area for transmitting data to a digital computer that indicates finger contact in said active area.

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