The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 2018
Filed:
Nov. 24, 2014
Flatfrog Laboratories Ab, Lund, SE;
Ola Wassvik, Briisarp, SE;
Hakan Bergstrom, Toma Hallestad, SE;
Thomas Craven-Bartle, Siidra Sandby, SE;
Christer Fahraeus, Bjarred, SE;
FLATFROG LABORATORIES AB, Lund, SE;
Abstract
A touch-sensitive apparatus operates by light frustration (FTIR) and comprises a light transmissive panel () with a front surface and a rear surface. Light emitters () and light detectors () optically face the rear surface along a perimeter of a touch-sensitive region () on the panel (). At least one diffusively reflecting element () is arranged on the front surface () along the perimeter of the touch-sensitive region (). The light emitters () are arranged to emit a respective beam of light onto the diffusively reflecting element (), so as to generate propagating light that propagates by total internal reflection inside the panel () across the touch-sensitive region (), and the light detectors () are arranged to receive detection light generated as the propagating light impinges on the diffusively reflecting element (), so as to define a grid of propagation paths (D) across the touch-sensitive region () between pairs of light emitters () and light detectors ().