Multiview display and method having light control film
A multiview display includes an array of light valves having rows of a repeating plurality of color sub-pixels and arranged as a plurality of multiview pixels configured to modulate directional light beams as color pixels of views of a multiview image. A first row of the repeating plurality of color sub-pixels is offset from a second row of the repeating plurality of color sub-pixels in a row direction by an integer multiple of a width of a color sub-pixel. The offset of the first and second rows is configured to provide corresponding color sub-pixels in adjacent multiview pixels having different colors to mitigate color fringing associated with the color pixel of the multiview image. The multiview display further includes a light control film configured to control a view angle of the multiview image.
1. A multiview display comprising:
an array of light valves having rows of a repeating plurality of color sub-pixels and arranged as a plurality of multiview pixels configured to modulate directional light beams as color pixels of views of a multiview image, a first row of the repeating plurality of color sub-pixels being offset from a second row of the repeating plurality of color sub-pixels in a row direction by an integer multiple of a width of a color sub-pixel;
a light control film configured to control a view angle of the multiview image; and
a plurality of multibeam columns spaced apart from one another along a length of the multiview display, a multibeam column of the plurality of multibeam columns being configured to provide the directional light beams in a horizontal-only directional pattern, the multiview display being a horizontal parallax-only display, the light control film having a light control axis oriented orthogonal to the horizontal-only directional pattern of the directional light beams,
wherein the offset of the first and second rows is configured to provide corresponding color sub-pixels in adjacent multiview pixels having different colors to mitigate color fringing associated with the color pixel of the multiview image.
2. The multiview display of claim 1 , wherein each color sub-pixel of the repeating plurality of color sub-pixels has a different color, the modulated light beams representing the respective different colors within the color pixels of the multiview image.
3. The multiview display of claim 2 , wherein the repeating plurality of color sub-pixels comprises a red color sub-pixel, a green color sub-pixel, and a blue color sub-pixel.
4. The multiview display of claim 1 , wherein:
the plurality of multibeam columns includes a plurality of multibeam emitters that are spaced apart from one another, a multibeam emitter of the plurality of multibeam emitters having a size between one half and two times a size of a light valve of the light valve array; and
a different subset of color sub-pixels of the repeating plurality of color sub-pixels of the array of light valves corresponds to each multibeam emitter of the multibeam emitter array, the different subset representing a multiview pixel of the plurality of multiview pixels of the multiview display.
5. The multiview display of claim 1 , wherein the multibeam column comprises a continuous multibeam element.
6. The multiview display of claim 4 , further comprising:
a light guide configured to guide light along a length of the light guide; and
an array of multibeam elements spaced apart from one another along the light guide length, a multibeam element of the multibeam element array being configured to scatter out from the light guide a portion of the guided light as the directional light beams,
wherein the multibeam element array is the multibeam emitter array, each multibeam element of the multibeam element array corresponding to a different multibeam emitter of the multibeam emitter array, and wherein the light control film is located between the light guide and the array of light valves and has a light control axis aligned with a column of multibeam elements of the multibeam element array.
7. The multiview display of claim 6 , wherein the multibeam element comprises one or more of a diffraction grating configured to diffractively scatter out the portion of the guided light as the directional light beams, a micro-reflective structure configured to reflectively scatter out the portion of the guided light as the directional light beams, and a micro-refractive structure configured to refractively scatter out the portion of the guided light as the directional light beams.
8. The multiview display of claim 6 , further comprising a broad-angle backlight adjacent to a side of the light guide opposite to a side adjacent to the light valve array, the broad-angle backlight being configured to provide broad-angle emitted light during a two-dimensional (2D) mode of the multiview display, the light valve array being configured to modulate the broad-angle emitted light as a 2D image,
wherein the light guide and multibeam element array are configured to be transparent to the broad-angle emitted light, the multiview display being configured to display the multiview image during a multiview mode and the 2D image during the 2D mode.
9. The multiview display of claim 1 , wherein the light control film has a light control axis aligned with a column of light valves of the light valve array.
10. A multiview display comprising:
an array light valves having a repeating plurality of color sub-pixels arranged in offset rows, light valves of the light valve array being arranged as multiview pixels configured to modulate directional light beams as color pixels of a multiview image;
an array of multibeam emitters configured to illuminate different multiview pixels with different sets of the directional light beams; and
a light control film configured to control a view angle of the multiview image, a light control axis of the light control film being aligned with a column of multibeam emitters of the multibeam emitter array,
wherein adjacent offset rows are offset from one another by an integer multiple of a width of a color sub-pixel, the offset between the adjacent rows being configured to provide a color sub-pixel of a first multiview pixel having a different color than a corresponding color sub-pixel of a second multiview pixel, and
wherein a multibeam emitter of the multibeam emitter array comprises an active optical emitter configured to emit light as the directional light beams, the active optical emitter having a size between one half and two times a size of a light valve of the light valve array.
11. The multiview display of claim 10 , wherein each color sub-pixel of the repeating plurality of color sub-pixels has a different color, the modulated light beams representing the respective different colors within the color pixels of the multiview image.
12. The multiview display of claim 10 , further comprising:
a light guide configured to guide light in a propagation direction along a length of the light guide; and
an array of multibeam elements spaced apart from one another along the light guide length, a multibeam element of the multibeam element array corresponding to a multibeam emitter of the multibeam emitter array and having a size between one half and two times a size of a light valve of the multiview pixel and being configured to scatter out from the light guide a portion of the guided light as the directional light beams,
wherein light valve array is located between the light control film and the light guide.
13. The multiview display of claim 12 , wherein the multibeam element comprises one or more of a diffraction grating, a micro-reflective element and a micro-refractive element optically connected to the light guide to scatter out the portion of the guided light.
14. The multiview display of claim 12 , further comprising a light source optically coupled to an input of the light guide, the light source being configured to provide light to be guided in the light guide as guided light one or both of having a non-zero propagation angle and being collimated according to a predetermined collimation factor.
15. A method of multiview display operation comprising:
emitting directional light beams using an array of multibeam emitters;
modulating the directional light beams using an array of light valves having rows of a repeating plurality of color sub-pixels and arranged as a plurality of multiview pixels to provide a multiview image; and
controlling a view angle of the multiview image using a light control film having a light control axis aligned with a column of multibeam emitters of the multibeam emitter array,
wherein a first row of the repeating plurality of color sub-pixels is offset from a second row of the repeating plurality of color sub-pixels to provide corresponding color sub-pixels in adjacent multiview pixels with different colors to mitigate color fringing associated with the color pixel of the multiview image being displayed by the multiview display,
wherein emitting the directional light beams comprises using a plurality of multibeam columns spaced apart from one another along a length of the multiview display to emit the directional light beams, each multibeam column of the multibeam column plurality being configured to emit a plurality of directional light beams having directions corresponding to view directions of the multiview display,
wherein the plurality of multibeam columns is the array of multibeam emitters and the multiview display is a horizontal parallax-only display, the view directions being arranged in a horizontal parallax arrangement, and wherein the light control film has a light control axis oriented orthogonal to the horizontal parallax arrangement of the view directions.
16. The method of multiview display operation of claim 15 , wherein each color sub-pixel of the repeating plurality of color sub-pixels has a different color, the modulated light beams representing the respective different colors within the color pixels of the multiview image, and wherein the second row is offset from the first row in a row direction by an integer multiple of a width of a color sub-pixel of the color sub-pixel plurality.
17. The method of multiview display operation of claim 15 , wherein emitting the directional light beams using the array of multibeam emitters comprises:
guiding light in a light guide as guided light; and
scattering out a portion of the guided light using a multibeam element of an array of multibeam elements to provide the directional light beams, a size of the multibeam element being between one half and two times a size of a light valve of the light valve array,
wherein the multibeam element array is the multibeam emitter array, each multibeam element of the multibeam element array corresponding to a different multibeam emitter of the multibeam emitter array.