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US 11,340,555 B2Granted
Adjustably multifocal 3D holographic display system
AssigneeHimax Display, Inc.
InventorsChe-Yung Shen, Shang-Hao Huang, Shang-Ting Wu, Shuo-En Lin, Yi Cheng, Yi-Pai Huang, Chi-Wen Lin
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Abstract
A three-dimensional (3D) holographic display system includes a projector that generates an image with a form of spatially varying modulation on a light beam; holographic processor that performs a holographic method on the image generated by the projector; and memory device that stores holographic data generated in a process of performing the holographic method by the holographic processor. An amplitude of a light field is adaptively replaced by the holographic processor according to significance of respective areas of the image.
Claims15
A three-dimensional (3D) holographic display system, comprising:
- a projector that generates an image with a form of spatially varying modulation on a light beam;
- a holographic processor that performs a holographic method on the image generated by the projector;
- and
- a memory device that stores holographic data generated in a process of performing the holographic method by the holographic processor;
- wherein an amplitude of a light field is adaptively replaced by the holographic processor according to significance of respective areas of the image;
- wherein the holographic method comprises:
- inputting an objective amplitude and a random phase as a light field at an image end;
- propagating the light field to a hologram end by using an angular spectrum method;
- outputting a hologram if a phase of the propagated light field converges;
- replacing an amplitude of the propagated light field with a plane wave or spherical wave to result in a modified light field if the phase of the propagated light field does not converge;
- propagating the modified light field from the hologram end to the image end by using the angular spectrum method;
- and
- adaptively replacing an amplitude of the modified light field according to significance of respective areas of the image.
10 more elements
A three-dimensional (3D) holographic display system, comprising:
- a projector that generates an image with a form of spatially varying modulation on a light beam;
- a holographic processor that performs a holographic method on the image generated by the projector;
- and
- a memory device that stores holographic data generated in a process of performing the holographic method by the holographic processor;
- wherein a first virtual image generated by an angular spectrum method is displayed in near field from a viewer, while a second virtual image generated by a Fresnel diffraction method is displayed in far field from the viewer;
- wherein the holographic method comprises:
- inputting an objective amplitude and a random phase as a light field at an image end;
- propagating a near-field light field and a far-field light field to a hologram end by using the angular spectrum method and the Fresnel diffraction method, respectively;
- adding the propagated near-field light field and far-field light field to result in an added light field, from which a phase is extracted;
- outputting a hologram if the extracted phase converges;
- replacing amplitudes of the propagated near-field light field and far-field light field with a plane wave or spherical wave to result in modified near-field light field and far-field light field if the extracted phase does not converge;
- propagating the modified near-field light field and far-field light field from the hologram end to the image end by using the angular spectrum method and the Fresnel diffraction method, respectively;
- and
- adaptively replacing amplitudes of the modified near-field light field and far-field light field according to significance of respective areas of the image.
11 more elements
A three-dimensional (3D) holographic display system, comprising:
- a projector that generates an image with a form of spatially varying modulation on a light beam;
- a holographic processor that performs a holographic method on the image generated by the projector;
- and
- a memory device that stores holographic data generated in a process of performing the holographic method by the holographic processor;
- wherein a first virtual image generated by an angular spectrum method is displayed in near field from a viewer, while a second virtual image generated by a Fresnel diffraction method is displayed in far field from the viewer;
- wherein the holographic method comprises:
- inputting an objective amplitude and a random phase as a light field at an image end;
- propagating a near-field light field and a far-field light field to a hologram end by using the angular spectrum method and the Fresnel diffraction method, respectively;
- adding the propagated near-field light field and far-field light field if phases of the propagated near-field light field and far-field light field converge, followed by outputting a hologram;
- replacing amplitudes of the propagated near-field light field and far-field light field with a plane wave or spherical wave to result in modified near-field light field and far-field light field if the phases of the propagated near-field light field and far-field light field do not converge;
- propagating the modified near-field light field and far-field light field from the hologram end to the image end by using the angular spectrum method and the Fresnel diffraction method, respectively;
- and
- adaptively replacing amplitudes of the modified near-field light field and far-field light field according to significance of respective areas of the image.
10 more elements
Dependencies are inferred from the claim text.