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

US9989766B2 · 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 spectacle lens includes a curved front and/or side, wherein a light guiding channel which is suitable for guiding light bundles of pixels of the generated image, which are coupled into the spectacle lens via the coupling-in section of the spectacle lens, in the spectacle lens to the coupling-out section to couple them out of the spectacle lens via the coupling-out section. The coupling-out section includes at least two deflecting surfaces arranged next to each other which reflect the light bundles in the direction of the rear side for the coupling out. Deflecting surfaces can be formed as a switchable layer which can be switched into a first and a second state, wherein the reflectivity of the switchable layers in the first state is higher than in the second state.