DIGITAL HOLOGRAM IMAGE DISPLAY DEVICE

• US 20120050830A1
• Filed: 06/10/2011
• Published: 03/01/2012
• Est. Priority Date: 08/31/2010
• Status: Abandoned Application

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Lee, Guensik, YOON, Minsung
• Application Number:
  US13/158,211
• Publication Number:
  US 20120050830A1
• Time in Patent Office: Days
• US Class Current: 359/11
• CPC Class Codes: G03H 1/22 Processes or apparatus for obtaining an optical image from holograms G03H1/26 - G03H1/34 take precedence
• CPC Class Codes: G03H 1/2249 Holobject properties
• CPC Class Codes: G03H 1/2286 Particular reconstruction light G03H1/24 takes precedence; Beam properties
• CPC Class Codes: G03H 1/2294 Addressing the hologram to an active spatial light modulator
• CPC Class Codes: G03H 2210/30 3D object
• CPC Class Codes: G03H 2223/14 Diffuser, e.g. lens array, random phase mask

Abstract

The present disclosure relates to a digital hologram display device in which the 0^th diffraction component is removed for optimizing the reproduction and replay of the three-dimensional hologram video data. The present disclosure suggests a digital hologram image display device comprising: a pattern generator generating holography interference patterns; a spatial light modulator receiving the holography interference patterns from the pattern generator and represent the holography interference patterns; a light source positioning at one side of the spatial light modulator and illuminating a reference beam to the spatial light modulator; an optical device controlling the reference beam to be raditated onto a whole surface of the spatial light; and a diffusion sheet having at least 20% of Haze value and disposed between the light source and the spatial light modulator.

Claims

1. A digital hologram image display device comprising:

a pattern generator generating holography interference patterns;

a spatial light modulator receiving the holography interference patterns from the pattern generator and represent the holography interference patterns;

a light source positioning at one side of the spatial light modulator and illuminating a reference beam to the spatial light modulator;

an optical device controlling the reference beam to be collimated onto a whole surface of the spatial light; and

a diffusion sheet having at least 20% of Haze value and disposed between the light source and the spatial light modulator.

2. The device according to claim 1, wherein the diffusion film has at most 50% of Haze value.

3. The device according to claim 1, wherein the diffusion film has Haze value selected one of 30%˜

40%.

4. The device according to claim 1, wherein the diffusion film is disposed between the optical device and the light source.

5. The device according to claim 1, wherein the diffusion film is disposed at next to the spatial light modulator.

6. The device according to claim 1, wherein the diffusion film is disposed between the optical device and the spatial light modulator.

7. The device according to claim 1, wherein the optical device comprises:

an expander enlarging the cross-sectional area of the reference beam; and

a lens system controlling the enlarged cross-sectional area of the reference beam to be corresponding to the whole surface of the spatial light modulator.

8. The device according to claim 1, wherein the spatial light modulator includes a liquid crystal display panel having:

a transparent upper substrate and a transparent lower substrate facing each other; and

a liquid crystal layer disposed between the transparent upper substrate and the transparent lower substrate.

9. The device according to claim 8, wherein the light source includes at least one of laser diode and a collimated LED which are disposed at one side of the liquid crystal display panel, and

the optical device includes an optical fiber having a light inlet connecting to the light source and a light outlet facing to the spatial light modulator.

10. The device according to claim 9, further comprising:

an optical sheet between the spatial light modulator and the diffusion film.