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US 10,649,128 B2Granted
Multibeam element-based backlight and display using same
AssigneeLeia Inc.
InventorsDavid A. Fattal, Ming Ma, Xuejian Li
Life of this patent
Estimating the term…
Abstract
A multiview backlight and a multiview display employ multibeam elements configured to provide a plurality of light beams having different principal angular directions corresponding to different view directions of the multiview display. The display includes multiview pixels that include sub-pixels. A size of the multibeam element is comparable to a size of a sub-pixel in a multiview pixel of the multiview display.
Claims20
A multiview backlight comprising:
- a light guide configured to guide light in a propagation direction along a length of the light guide;
- and
- a plurality of multibeam elements spaced apart from one another along the light guide length, a multibeam element of the plurality of multibeam elements being configured to couple out from the light guide a portion of the guided light as a plurality of coupled-out light beams having different principal angular directions corresponding to respective different view directions of a multiview display comprising multiview pixels,
- wherein a size of the multibeam element is comparable to a size of a sub-pixel in a multiview pixel of the multiview display, a relationship between the multibeam elements of the plurality of multibeam elements and corresponding multiview pixels of the multiview display being a one-to-one relationship, and wherein the multibeam elements of the plurality of multibeam elements are arranged in a two-dimensional (2D) array.
1 more element
A multiview display comprising:
- an array of multiview pixels configured to provide a plurality of different views of the multiview display, a multiview pixel comprising a plurality of sub-pixels configured to modulate a plurality of light beams;
- and
- an array of multibeam elements, each multibeam element being configured to provide the plurality of light beams to a corresponding multiview pixel, light beams of the plurality of light beams having different principal angular directions from one another corresponding to different view directions of the different views,
- wherein a size of a multibeam element of the multibeam element array is comparable to a size of a sub-pixel of the sub-pixel plurality, an inter-element distance between adjacent multibeam elements of the multibeam element array corresponds to an inter-pixel distance between adjacent multiview pixels of the multiview pixel array, and
- wherein a relationship between the multibeam elements of the multibeam element array and corresponding multiview pixels of the multiview pixel array is a one-to-one relationship, the multibeam elements of the multibeam element array being arranged in a two-dimensional (2D) array.
2 more elements
A method of multiview backlight 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 plurality of coupled-out light beams having different principal angular directions corresponding to respective different view directions of a multiview display,
- wherein a size of the multibeam element is comparable to a size of a sub-pixel in a multiview pixel of the multiview display, a relationship between multibeam elements of a plurality of multibeam elements and corresponding multiview pixels of the multiview display being a one-to-one relationship, and
- wherein the multibeam elements of the plurality of multibeam elements are arranged in a two-dimensional (2D) array.
2 more elements
Dependencies are inferred from the claim text.