| CPC H04N 13/307 (2018.05) [H04N 13/322 (2018.05)] | 12 Claims |
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1. A device for optical-field displaying, wherein the device comprises: a display screen and a lens unit that is provided on a light exiting side of the display screen;
the lens unit comprises a plurality of lenses that are arranged in an array;
the display screen is provided on a focal plane of the plurality of lenses;
the display screen comprises a first substrate and a second substrate that match;
the first substrate is a light-exiting-side substrate, the second substrate comprises a plurality of pixel islands that are arranged in an array, and each of the pixel islands comprises at least one sub-pixel;
the plurality of pixel islands correspond to the plurality of lenses; and
a view region formed by light rays that are emitted by the sub-pixels of the pixel islands and propagated via the corresponding lenses to a human eye is smaller than or equal to a half-pupil region, and light rays of different viewpoints that are emitted by different sub-pixels of the pixel islands enter different cone cells via the lenses;
wherein the lenses are spherical lenses, and the plurality of lenses are closely arranged; and
an aperture D of the lenses satisfies:
 wherein L is an actual watching distance, N is a quantity of the viewpoints, N≥2, and ε is a human-eye limiting angle of resolution;
wherein the human-eye limiting angle of resolution ε=2′, and the aperture D of the lenses satisfies:
 wherein,
a first watching distance LF satisfies:
 a focal length f of the lenses satisfies:
 and
a placement height t of the lenses satisfies:
t=nf;
wherein a is a value of a side length of a longer side of the display screen, e is an interpupillary distance between human eyes, p is a pixel spacing of the display screen, Φ is a pupil diameter of a human eye, ω is a field angle of the lenses, s is a preset movable distance, and n is a refractive index of the lenses.
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