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Method and apparatus for wireless cursor position control

  • US 4,578,674 A
  • Filed: 04/20/1983
  • Issued: 03/25/1986
  • Est. Priority Date: 04/20/1983
  • Status: Expired due to Term
First Claim
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1. Apparatus for controlling the motion of a cursor on a screen comprising:

  • a wireless cursor position control device with an infrared detector for detecting a first signal transmittal from a control base and an ultrasonic emitter for transmitting a second signal generated in response to said detected first signal,a control base with one or more infrared emitters for transmitting signals to said first detector in said cursor position control device and a plurality of ultrasonic detectors for receiving signals from said ultrasonic emitters in said cursor position control device, andmeans to calculate the relative motion of a cursor from said directions and velocity of said cursor position control device.

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