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. 24, 2017
Filed:
Jan. 30, 2012
Thomas Craven-bartle, Södra Sandby, SE;
Håkan Bergström, Torna Hällestad, SE;
Thomas Craven-Bartle, Södra Sandby, SE;
Håkan Bergström, Torna Hällestad, SE;
Flatfrog Laboratories AB, Lund, SE;
Abstract
A touch-sensitive apparatus comprises a light transmissive panel, an illumination arrangement and a detection arrangement. The illumination arrangement is configured to couple light into the panel via an incoupling site such that the light propagates by total internal reflection in opposite top and bottom surfaces of the panel and such that an object touching the top or bottom surface causes a change in the propagating light. The detection arrangement comprises a light detector arranged to detect the change in the propagating light. A compact and robust incoupling site is defined by a sheet-like micro-structured surface portion which is fixedly arranged on one of the top and bottom surfaces and configured to transmit light having an angle of incidence that enables light propagation by TIR inside the panel.