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:
Jul. 12, 2016
Filed:
Sep. 05, 2012
Thomas Craven-bartle, Sodra Sandby, SE;
Thomas Craven-Bartle, Sodra Sandby, SE;
Flatfrog Laboratories AB, Lund, SE;
Abstract
A coupling element () for use in a touch-sensitive apparatus is arranged to transfer light between an electro-optical device () and a panel () for light transmission. The electro-optical device () is an emitter or a detector and has an operative solid angle given by orthogonal device divergence angles. The coupling element () is an optical component with a first light transmission surface () for facing the electro-optical device (), and a second light transmission surface () for mounting on the panel (). The coupling element () has an optical structure () that directs the light between the first and second light transmission surfaces () by one or more reflections while expanding one device divergence angle (αx) into a component divergence angle at the second light transmission surface (). Thereby, the component divergence angle defines a divergence (φp) in the plane of the panel () with respect to light propagating by internal reflections inside the light transmissive panel ().