Invention Grant
- Patent Title: Variable-focus virtual image devices based on polarization conversion
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Application No.: US15902927Application Date: 2018-02-22
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Publication No.: US11036109B2Publication Date: 2021-06-15
- Inventor: Chulwoo Oh
- Applicant: Magic Leap, Inc.
- Applicant Address: US FL Plantation
- Assignee: Magic Leap, Inc.
- Current Assignee: Magic Leap, Inc.
- Current Assignee Address: US FL Plantation
- Agency: Knobbe, Martens, Olson & Bear, LLP
- Main IPC: G02F1/137
- IPC: G02F1/137 ; F21V8/00 ; G02F1/133 ; G02B27/01 ; G02B26/08 ; G02F1/29

Abstract:
Example display devices include a waveguide configured to propagate visible light under total internal reflection in a direction parallel to a major surface of the waveguide. The waveguide has formed thereon an outcoupling element configured to outcouple a portion of the visible light in a direction normal to the major surface of the waveguide. The example display devices additionally include a polarization-selective notch reflector disposed on a first side of the waveguide and configured to reflect visible light having a first polarization while transmitting the portion of the visible light having a second polarization. The example display devices further include a polarization-independent notch reflector disposed on a second side of the waveguide and configured to reflect visible light having the first polarization and the second polarization, where the polarization-independent notch reflector is configured to convert a polarization of visible light reflecting therefrom.
Public/Granted literature
- US10782582B2 Variable-focus virtual image devices based on polarization conversion Public/Granted day:2020-09-22
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