Display device having a holding device that can be placed on the head of a user

US9134535B2 · kind B2 · utility

Assignee

• Carl Zeiss AG · DE

Inventors

• Hans-Jürgen Dobschal · Kleinromstedt, DE
• Karsten Lindig · Erfurt, DE
• Guenter Rudolph · Jena, DE

Key dates

• Filing date: Jul 21, 2011
• Grant date: Sep 15, 2015
• Expiry date: Nov 7, 2031

Classification

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

Abstract

A display device includes a holding device that can be placed on the head of a user. An image-generating module and an imaging lens system can be secured on the holding device. The latter includes a spectacle lens with a curved front and a curved back. It projects the image generated when the holding device is placed on the head such that the user can perceive it superimposed on the surroundings. Light from the image-generating module is coupled into an optical channel in the spectacle lens. It is conducted in the optical channel to an exit section and coupled via the exit section out of the spectacle lens. The optical channel includes in the region of the front and back a Fresnel structure with a plurality of facets on which the light conducted in the optical channel is reflected, and which are aligned parallel to one another.