Multibeam diffraction grating-based backlighting
AssigneeLeia Inc.
InventorsDavid A. Fattal, Zhen Peng, Charles M. Santori
Life of this patent
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Abstract
Multibeam diffraction grating-based backlighting includes a light guide and a multibeam diffraction grating at a surface of the light guide. The light guide is to guide light from a light source. The multibeam diffraction grating is to couple out a portion of the guided light using diffractive coupling and to direct the coupled out portion away from the light guide as a plurality of light beams with different principal angular directions.
Claims17
A multibeam diffraction grating-based backlight comprising:
- a light guide to guide light from a light source;
- a multibeam diffraction grating at a surface of the light guide, the multibeam diffraction grating to couple out a portion of the guided light using diffractive coupling, the coupled out portion of the guided light being directed away from the light guide surface as a plurality of light beams, a light beam of the plurality having a different principal angular direction from other light beams of the plurality.
A three-dimensional (3-D) electronic display comprising:
- a plate light guide to guide light from a light source;
- a multibeam diffraction grating to couple out a portion of the guided light as a plurality of light beams and to direct the light beams in a corresponding plurality of different principal angular directions;
- and
- a light valve array to modulate the differently directed light beams of the plurality,
- wherein the plurality of modulated, differently directed, light beams represents pixels of the 3-D electronic display, different ones of the modulated differently directed light beams corresponding to different views of the 3-D electronic display.
A method of electronic display operation, the method comprising:
- guiding light in a light guide;
- diffractively coupling out a portion of the guided light using a multibeam diffraction grating at a surface of the light guide to produce a plurality of light beams;
- and
- directing the plurality of light beams away from the light guide surface,
- wherein a light beam of the plurality has a different principal angular direction from other light beams of the plurality.
Dependencies are inferred from the claim text.