Three-dimension light field construction apparatus

Patent metadata

Field	Value
Publication number	US-9632406-B2
Application number	US-201514878002-A
Country	US
Kind code	B2
Filing date	Oct 8, 2015
Priority date	Feb 25, 2015
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A three-dimension light field construction apparatus is applied to constrict a light field on a viewing plane. The three-dimension light field construction includes a plurality of projectors and a rear-displaying unit. The projectors are arranged along a first axis, and each projector projects an imaging beam along a second axis perpendicular to the first axis. The rear-displaying unit comprises a linear Fresnel lens and a vertical diffuser, the linear Fresnel lens is close to the projectors. The rear-displaying unit makes each of the imaging beams converge on a virtual surface between the rear-displaying unit and the viewing plane for forming at least one intersection, so as to construct at least one light field on the viewing plane.

First claim

What is claimed is:

1. A three-dimension light field construction apparatus configured to construct at least one light field on a viewing plane, the three-dimension light field construction apparatus comprising:
a plurality of projectors arranged along a first axis, and each of the projectors projecting an imaging beam along a second axis perpendicular to the first axis;
a rear-displaying unit comprising a linear Fresnel lens and a vertical diffuser, the linear Fresnel lens close to the projectors, wherein the rear-displaying unit makes each of the imaging beams converge on a virtual surface between the rear-displaying unit and the viewing plane for forming at least one intersection, so as to construct at least one light field on the viewing plane; and
a light-splitting prism arranged between the linear Fresnel lens and the vertical diffusor and configured to construct a plurality of identical light fields.

2. The three-dimension light field construction apparatus in claim 1 , further comprising a one-dimension optical-converging component, the one-dimension optical-converging component comprising a plurality of sub-lenses arranged along the first axis, wherein an amount of the sub-lenses is inversely proportional to an amount of the projector, and each sub-lens makes the imaging beam projected by each projector construct a plurality of sub-light fields on the viewing plane.

3. The three-dimension light field construction apparatus in claim 2 , wherein the sub-lenses protrude forward the second axis.

4. The three-dimension light field construction apparatus in claim 2 , wherein a focal length of the linear Fresnel lens is smaller than a distance between the projectors and the rear-displaying unit.

5. The three-dimension light field construction apparatus in claim 1 , wherein the light-splitting prism comprises a plurality of light-refracting structures, each light-refracting structure comprises a first surface, a second surface, and a third surface, and the second surface and the third surface are symmetrically adjacent to the first surface.

6. The three-dimension light field construction apparatus in claim 5 , wherein the first surface, the second surface, and the third surface are flat surfaces.

7. The three-dimension light field construction apparatus in claim 1 , the first surface, the second surface, and the third surface are curved surfaces.

8. A three-dimension light field construction apparatus configured to construct at least one light field on a viewing plane, the three-dimension light field construction apparatus comprising:
a plurality of projectors arranged along a first axis, and each projector projecting an imaging beam along a second axis perpendicular to the first axis; and
a reflective-displaying unit comprising:
a plurality of concave mirrors arranged in an arc direction to face the projectors; and
a plurality of pixel units placed on each of the concave mirrors;

wherein the concave mirrors make each of the imaging beams converge on a virtual surface between the reflective-displaying unit and the viewing plane for forming a plurality of intersections, so as to construct a plurality of light fields on the viewing plane.

9. The three-dimension light field construction apparatus in claim 8 , wherein each of the pixel units comprises a first cambered surface, a second cambered surface, and a third cambered surface, the second cambered surface and the third cambered surface are adjacent to the first cambered surface respectively, and the first, second and third cambered surfaces face the projectors respectively.

Assignees

• Delta Electronics Inc

Inventors

• Wang Yu-Chang

Classifications

• G02B3/08

  with discontinuous faces, e.g. Fresnel lens {(diffractive Fresnel lenses G02B5/1876)} · CPC title

• G03B21/28

  Reflectors in projection beam {(in illumination beam G03B21/2066)} · CPC title

• G02B17/002

  Arrays of reflective systems · CPC title

• G03B21/602

  Lenticular screens (G03B21/625 takes precedence) · CPC title

• H04N13/363

  using image projection screens (volumetric display H04N13/388) · CPC title