Three-dimensional (3D) electronic display
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United States of America Patent
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Dec 7, 2021
Grant Date -
Jan 11, 2018
app pub date -
Jul 31, 2017
filing date -
Jan 28, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
Three-dimensional (3D) electronic displays provide different 3D views and employ one or both of an array of multibeam diffraction gratings arranged in offset rows and light valves having color filters. The displays include a plate light guide configured to guide light beams at a non-zero propagation angle, a multibeam diffraction grating configured to couple out a portion of the guided light beams as a plurality of light beams having different principal angular directions representing the different 3D views, and light valves configured to modulate the differently directed, coupled-out light beams. The multibeam diffraction grating may be a member of the array arranged in offset rows and the display may further include light valves having color filters. Alternately, the light valves include color filters and the display may further include the array of multibeam diffraction gratings arranged in offset rows.
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