Invention Grant
- Patent Title: Rainbow reduction in waveguide displays
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Application No.: US16209719Application Date: 2018-12-04
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Publication No.: US10761330B2Publication Date: 2020-09-01
- Inventor: Hee Yoon Lee , Ningfeng Huang , Eric Fest , Pasi Saarikko , Erik Shipton , Giuseppe Calafiore
- Applicant: Facebook Technologies, LLC
- Applicant Address: US CA Menlo Park
- Assignee: Facebook Technologies, LLC
- Current Assignee: Facebook Technologies, LLC
- Current Assignee Address: US CA Menlo Park
- Agency: Kilpatrick Townsend & Stockton LLP
- Main IPC: G02B5/18
- IPC: G02B5/18 ; G02B27/01 ; F21V8/00 ; G02B5/22

Abstract:
A waveguide display includes a first substrate and one or more grating layers on a first surface of the first substrate. The one or more grating layers are configured to cause destructive interference between ambient light diffracted by at least two grating layers or between ambient light diffracted by different portions of one grating layer. In some embodiments, the waveguide display also includes an angular-selective transmissive layer. The angular-selective transmissive layer is configured to reflect, diffract, or absorb ambient light incident on the angular-selective reflective layer with an incidence angle greater than a threshold value.
Public/Granted literature
- US20190227321A1 RAINBOW REDUCTION IN WAVEGUIDE DISPLAYS Public/Granted day:2019-07-25
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