Optical elements with alternating reflective lens facets

US9052777B2 · kind B2 · utility

Assignee

• Neonode Inc. · SE

Inventors

• Stefan Holmgren · Sollentuna, SE
• Lars Sparf · Ljungby, SE
• Magnus Goertz · Lidingö, SE
• Thomas Eriksson · Stockholm, SE
• Joseph Shain · Rehovot, IL
• Anders Jansson · Uppsala, SE
• Niklas Kvist · Varedo, IT
• Robert Pettersson · Åtvidaberg, SE
• John Karlsson · Brooklyn, US

Key dates

• Filing date: Mar 20, 2012
• Grant date: Jun 9, 2015
• Expiry date: May 27, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F2203/04808
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An optical element for a light based touch surface including a concatenated plurality of segments, wherein each segment is paired with a respective light emitter, each segment including an undulating series of pairs of reflective or refractive facets, wherein a first facet in each pair is oriented so as to collimate light emitted from a first light emitter associated with the segment and a second facet in each pair is oriented so as to collimate light emitted from a second light emitter associated with the segment, and wherein the first light emitter associated with the segment is the light emitter paired with the segment and the second light emitter associated with the segment is the light emitter paired with a neighboring segment.