Spectacle lens for a display device that can be fitted on the head of a user and generates an image, and display device with such a spectacle lens

US9989767B2 · kind B2 · utility

Assignee

• tooz technologies GmbH · DE

Inventors

• Hans-Juergen Dobschal · Kleinromstedt, DE
• Karsten Lindig · Erfurt, DE
• Guenter Rudolph · Jena, DE
• Ersun Kartal · Aalen, DE
• Lisa Riedel · Jena, DE
• Frank Widulle · Neu-Ulm, DE
• Michael Patra · Oberkochen, DE

Key dates

• Filing date: Apr 16, 2015
• Grant date: Jun 5, 2018
• Expiry date: Apr 16, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2027/0178
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A spectacle lens for a display device can be fitted on the head of a user and generate an image. The front side and/or the rear side can be curved. A light guiding channel can guide-light bundles of pixels of the generated image, which are coupled into the spectacle lens via the coupling-in section and coupled out of the spectacle lens via the coupling-out section. The light guiding channel includes a first reflecting surface and a second reflecting surface spaced apart from the first reflecting surface, each of which extend in a direction from the coupling-in section to the coupling-out section. At least one of the two reflecting surfaces can be formed as a switchable layer which can be switched into a first and a second state. The reflectivity of the switchable layer in the first state is higher than in the second state.