×

Fingertip Detection for Camera Based Multi-Touch Systems

  • US 20090128499A1
  • Filed: 11/15/2007
  • Published: 05/21/2009
  • Est. Priority Date: 11/15/2007
  • Status: Active Grant
First Claim
Patent Images

1. A touch detection system comprising:

  • a light guiding sheet having a touch surface and a rear surface;

    a source arranged to couple light into an edge of the light guiding sheet, such that the light is totally internally reflected within the light guiding sheet;

    a reflective layer in proximity to the rear surface of the light guiding sheet; and

    a detector arranged to detect light emitted by the source which is scattered as a result of a touch event and reflected by the reflective layer.

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