Is a
Patent attributes
Patent Applicant
Current Assignee
0
Patent Jurisdiction
Patent Number
Patent Inventor Names
Giuseppe Calafiore0
Alexander Koshelev0
Date of Patent
January 17, 2023
0Patent Application Number
174863830
Date Filed
September 27, 2021
0Patent Citations
Patent Primary Examiner
A waveguide illuminator includes an input waveguide, a waveguide splitter coupled to the input waveguide, and a waveguide array coupled to the waveguide splitter. The waveguide array includes an array of out-coupling gratings that out-couple portions of the split light beam to form an array of out-coupled beam portions for illuminating a display panel. The out-coupling gratings may be apodized to reduce light scattering by the gratings. Additionally, gaps between the out-coupling gratings along the waveguides may be filled by gap gratings and/or etched grooves running parallel to the waveguides.
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