Light-field display

Patent metadata

Field	Value
Publication number	US-2018101018-A1
Application number	US-201715720887-A
Country	US
Kind code	A1
Filing date	Sep 29, 2017
Priority date	Oct 11, 2016
Publication date	Apr 12, 2018
Grant date	—

Abstract

A light-field display device includes a screen, a grating pixel array, and an image generator. The image generator outputs light including three-dimensional (3D) image information. The grating pixel array is configured to diffract the light including the 3D image information in multiple directions, thereby forming a 3D image. The image generator outputs the light having the 3D image information to the screen at a predetermined angle.

First claim

What is claimed is:

1 . A light-field display device comprising:
a screen, and an image generator configured to radiate light comprising three-dimensional (3D) image information onto the screen at a predetermined angle; wherein the screen comprises a grating pixel array configured to diffract, in multiple directions, the light comprising the 3D image information, thereby forming a 3D image.

2 . The light-field display device of claim 1 , wherein the grating pixel array is disposed on a surface of the screen or within the screen.

3 . The light-field display device of claim 1 , wherein the image generator is spaced apart from the screen.

4 . The light-field display device of claim 1 , wherein the image generator comprises a beam projector.

5 . The light-field display device of claim 1 , wherein the image generator comprises:
a light source configured to output light; a light modulator configured modulate the light, output by the light source, on a pixel-by-pixel basis; and a controller configured to control the light modulator to output the light comprising the 3D image information.

6 . The light-field display device of claim 5 , wherein the image generator further comprises a beam adjustor configured to adjust a magnification of the light comprising the 3D image information.

7 . The light-field display device of claim 5 , wherein
the screen comprises an alignment mark, and the image generator further comprises a detection sensor configured to sense the alignment mark of the screen.

8 . The light-field display device of claim 1 , wherein the image generator is configured to generate, via one of a one-shot method, a single-spot beam scanning method, a line-beam scanning method, and a time sequential emission method, the 3D image.

9 . The light-field display device of claim 1 , wherein the screen is transparent.

10 . The light-field display device of claim 1 , wherein
the screen comprises an alignment mark, and the image generator is configured to sense the alignment mark of the screen and to adjust the 3D image information based on the sensing of the alignment mark.

11 . The light-field display device of claim 1 , wherein the screen comprises an eyeglass lens.

12 . The light-field display device of claim 1 , wherein the screen comprises a windshield of an automobile.

13 . The light-field display device of claim 1 , wherein the screen is disposed on an automobile, such that the 3D image is formed on a windshield of the automobile.

14 . The light-field display device of claim 1 , wherein the screen comprises a cover of a wrist-type mobile device that is opened.

15 . The light-field display device of claim 1 , wherein the screen is slidably moveable with respect to a smartphone.

16 . The light-field display device of claim 1 , wherein
the grating pixel array comprises a 2D array of grating pixels, and each grating pixel comprises a grating pattern configured to diffract light having a specific wavelength.

17 . The light-field display device of claim 16 , wherein
each grating pixel comprises at least a first sub grating pixel configured to diffract light of a first wavelength and a second sub grating pixel configured to diffract light of a second wavelength, different from the first wavelength.

18 . The light-field display device of claim 16 , wherein the grating pixel array is transparent.

19 . A light-field display device comprising:
an image generator comprising a light source and a modulator configured to modulate light from the light source and output light comprising three-dimensional (3D) image information; a screen; and a grating pixel array comprising a two-dimensional array of grating pixels, each of which diffract, in multiple directions, the light comprising the 3D image information, thereby displaying a 3D image.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Chung Jaeseung
• Park Joonyong
• Kim Dongouk
• Bae Jihyun
• Shim Dongsik
• Lee Sunghoon
• Shin Bongsu
• Song Seokho

Classifications

• H04N13/302

  for viewing without the aid of special glasses, i.e. using autostereoscopic displays · CPC title

• H04N13/106

  Processing image signals (for multi-view video sequence encoding H04N19/597) · CPC title

• G02B5/1819

  Plural gratings positioned on the same surface, e.g. array of gratings (plural diffractive elements positioned sequentially along the optical path G02B27/4272) · CPC title

• H04N13/32 Primary

  using arrays of controllable light sources; using moving apertures or moving light sources · CPC title

• G02B27/01

  Head-up displays · CPC title