×

Determining positional information of an object in space

  • US 9,702,977 B2
  • Filed: 03/14/2014
  • Issued: 07/11/2017
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
Patent Images

1. A method of tracking motion of a target object for gesture control of a system by determining positional information of the target object moving in a region of space within range of a light sensitive sensor, the method including:

  • scanning the region of space monitored by the light sensitive sensor by selectively illuminating respective directionally oriented non-coplanar light sources of a plurality of directionally oriented non-coplanar light sources that (i) are mounted to a single non-coplanar surface and (ii) have at least some overlapping fields of illumination;

    measuring, using the light sensitive sensor, one or more differences in an intensity of returning light emitted from the respective directionally oriented non-coplanar light sources and reflected from the target object as the target object moves through the region of space;

    determining positional information of the target object based on, at least, a first position in space at a first time t0 and a second position in space at a second time t1 sensed using the measured one or more differences in the intensity of the returning light;

    determining a movement of the target object in response to a difference in the determined positional information of the target object at the first time t0 and the second time t1; and

    recognizing gesture control in response to the determined movement of the target object.

View all claims
  • 11 Assignments
Timeline View
Assignment View
    ×
    ×