Active complex spatial light modulation method and apparatus for an ultra-low noise holographic display

Patent metadata

Field	Value
Publication number	US-11480918-B2
Application number	US-201916562371-A
Country	US
Kind code	B2
Filing date	Sep 5, 2019
Priority date	Feb 28, 2019
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

Disclosed are an active complex spatial light modulation method and apparatus for an ultra-low noise holographic display. The active complex spatial light modulation apparatus includes a substrate and a petal antenna including three petal patterns arranged on the substrate, dividing a complex plane into three phase sections, and modulating the input light into three-phase amplitude values corresponding to the phase sections. The petal antenna may have a point symmetry shape based on the center point of the petal antenna.

First claim

What is claimed is:

1. An active complex spatial light modulation apparatus for an ultra-low noise holographic display, the apparatus comprising:
a substrate including a first surface to which an input light is incident and a second surface through which the input light is transmitted, the second surface facing the first surface, the substrate being formed of a silicon dioxide material; and
a petal antenna comprising three petal patterns arranged directly on the second surface of the substrate such that the input light is input from the substrate to the petal antenna, dividing a complex plane into three phase sections, and modulating the input light passing through the second surface into three-phase amplitude values corresponding to the phase sections,
wherein the petal antenna has a point symmetry shape based on a center point of the petal antenna,
wherein each of the petal patterns comprises at least two petal elements arranged in a point symmetry form based on the center point,
wherein at least two of the petal elements are spaced apart from each other with the center point interposed between the at least two petal elements,
wherein a first petal pattern of the three petal patterns detects a first phase section from the input light, and represents the input light as a first amplitude value corresponding to the first phase section,
wherein a second petal pattern of the three petal patterns detects a second phase section from the input light, and represents the input light as a second amplitude value corresponding to the second phase section,
wherein a third petal pattern of the three petal patterns detects a third phase section from the input light, and represents the input light as a third amplitude value corresponding to the third phase section, and
wherein the first amplitude value is determined based on the size of the first petal pattern, the second amplitude value is determined based on the size of the second petal pattern, and the third amplitude value is determined based on the size of the third petal pattern.

2. The apparatus of claim 1 , wherein the petal patterns are mutually tilted by 60°.

3. The apparatus of claim 1 , wherein each of the amplitude values is adjusted based on at least any one of a width or length of each of the petal patterns.

4. An operating method of an active complex spatial light modulation apparatus for an ultra-low noise holographic display, the operating method comprising:
detecting, by a petal antenna comprising three petal patterns arranged on a substrate formed of a silicon dioxide material and including a first surface to which an input light is incident and a second surface through which the input light is transmitted, the second surface facing the first surface, the input light passing through the second surface and input to a center point of the petal antenna;
modulating, by the petal antenna, the input light into three-phase amplitude values corresponding to three phase sections divided from a complex plane through the petal patterns,
wherein the petal antenna has a point symmetry shape based on the center point and is arranged directly on the second surface of the substrate such that the input light is input from the substrate to the petal antenna,
wherein each of the petal patterns comprises at least two petal elements arranged in a point symmetry form based on the center point,
wherein at least any two of the petal elements are spaced apart from each other with the center point interposed between the at least two petal elements,
wherein a first petal pattern of the three petal patterns detects a first phase section from the input light, and represents the input light as a first amplitude value corresponding to the first phase section,
wherein a second petal pattern of the three petal patterns detects a second phase section from the input light, and represents the input light as a second amplitude value corresponding to the second phase section,
wherein a third petal pattern of the three petal patterns detects a third phase section from the input light, and represents the input light as a third amplitude value corresponding to the third phase section, and
wherein the first amplitude value is determined based on the size of the first petal pattern, the second amplitude value is determined based on the size of the second petal pattern, and the third amplitude value is determined based on the size of the third petal pattern.

5. The method of claim 4 , wherein the petal patterns are mutually tilted by 60°.

6. The method of claim 4 , wherein each of the amplitude values is adjusted based on at least any one of a width or length of each of the petal patterns.

7. The method of claim 4 , wherein each of the amplitude values is adjusted based on transmittance of a display pixel by attaching an active amplitude modulation display pixel to each of the petal patterns.

8. A pixel structure of an active complex spatial light modulation apparatus for an ultra-low noise holographic display, the structure comprising:
a substrate including a first surface to which an input light is incident and a second surface through which the input light is transmitted, the second surface facing the first surface, the substrate being formed of a silicon dioxide material;
a petal antenna comprising three petal patterns arranged directly on the second surface of the substrate such that the input light is input from the substrate to the petal antenna, dividing a complex plane into three phase sections, and modulating the input light passing through the second surface into three-phase amplitude values corresponding to the phase sections,
wherein the petal antenna has a point symmetry shape based on a center point of the petal antenna,
wherein each of the petal patterns comprises at least two petal elements arranged in a point symmetry form based on the center point,
wherein at least two of the petal elements are spaced apart from each other with the center point interposed between the at least two petal elements,
wherein a first petal pattern of the three petal patterns detects a first phase section from the input light, and represents the input light as a first amplitude value corresponding to the first phase section,
wherein a second petal pattern of the three petal patterns detects a second phase section from the input light, and represents the input light as a second amplitude value corresponding to the second phase section,
wherein a third petal pattern of the three petal patterns detects a third phase section from the input light, and represents the input light as a third amplitude value corresponding to the third phase section, and
wherein the first amplitude value is determined based on the size of the first petal pattern, the second amplitude value is determined based on the size of the second petal pattern, and the third amplitude value is determined based on the size of the third petal pattern.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Hwi

Classifications

• G02F1/29

  for the control of the position or the direction of light beams, i.e. deflection · CPC title

• H01Q15/008

  said selective devices having Sievenpipers' mushroom elements · CPC title

• G02F1/025

  in an optical waveguide structure (G02F1/017, {G02F1/2257} take precedence) · CPC title

• G02F2203/12

  spatial light modulator · CPC title

• G03H2225/33

  Complex modulation · CPC title