Multiview backlight, multiview display and method employing offset multibeam elements
AssigneeLeia Inc.
InventorsDavid A. Fattal, John Rayfield
Life of this patent
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Abstract
A multiview backlight and a multiview display employ a multibeam element configured to provide a tilted plurality of directional light beams having different principal angular directions corresponding to view directions of a plurality of view in a view zone. The multiview backlight includes a light guide configured to guide light as guided light and the multibeam element configured to couple out a portion of the guided light as the tilted plurality of directional light beams. A tilt angle of the tilted directional light beam plurality is provided by an offset of the multibeam element and a corresponding multiview pixel. The multiview display includes an array of multibeam elements and an array of multiview pixels.
Claims20
A multiview backlight, comprising:
- a light guide configured to guide light as guided light according to total internal reflection;
- and
- a multibeam element configured to couple out a portion of the guided light as a tilted plurality of directional light beams having different principal angular directions corresponding to view directions of a plurality of views in a view zone of a multiview display, a tilt angle of the tilted plurality of directional light beams being provided by an offset of the multibeam element from a centerline of a corresponding multiview pixel of the multiview display,
- wherein the tilt angle is configured to provide the plurality of views in the view zone of the multiview display.
A multiview display comprising:
- an array of multiview pixels configured to provide a plurality of different views to a view zone of the multiview display, a multiview pixel of the multiview pixel array comprising a plurality of light valves configured to modulate a tilted plurality of directional light beams having different principal angular directions corresponding to view directions of the different views;
- a light guide configured to guide light as guided light according to total internal reflection;
- and
- an array of multibeam elements optically coupled to the light guide, each multibeam element of the multibeam element array being configured to provide to a corresponding multiview pixel the tilted directional light beam plurality,
- wherein a tilt angle of the tilted directional light beam plurality is determined by an offset between the multibeam element and the corresponding multiview pixel.
A method of multiview display operation, the method comprising:
- guiding light in a propagation direction along a length of a light guide;
- and
- coupling a portion of the guided light out of the light guide using a multibeam element to provide a tilted plurality of directional light beams having different principal angular directions corresponding to respective different view directions of a plurality of different views of a multiview display, the tilted plurality of directional light beams having a tilt angle corresponding to an offset of the multibeam element from a centerline of a multiview pixel in the multiview display,
- wherein the plurality of different views are provided to a view zone of the multiview display.
Dependencies are inferred from the claim text.