Methods and apparatus for radial automultiscopic display

Patent metadata

Field	Value
Publication number	US-10855974-B2
Application number	US-201916250088-A
Country	US
Kind code	B2
Filing date	Jan 17, 2019
Priority date	Jan 17, 2018
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A display system may comprise a radially symmetric mirror, a display screen, and a radial array of lenticular lenses. The mirror may be a frustum of a cone. Light from the screen may pass through the radial array and then reflect from the mirror, to create a 360-degree automultiscopic display. The automultiscopic display may display multiple rendered views of a 3D scene, each of which shows the scene from a different virtual camera angle. Which rendered view is visible may depend on the angular position of a user. Each lenticular lens may be wedge-shaped and may have a constant focal length and a constant height-width ratio. In some cases, slices from some, but not all, of the rendered views are displayed under any single lenticular lens at a given time. The lenticular array may be replaced by a holographic optical element, or by radial array of parallax barriers.

First claim

What is claimed:

1. A method for creating an automultiscopic display of a 3D object, which method comprises the steps of:
(a) displaying, with an electronic display screen that is positioned under a radial array of lenticular lenses, a set of multiple views of the 3D object, in such way that
(i) each view in the set shows the 3D object from a different angle,
(ii) for each specific view in the set, the screen displays multiple slices of the specific view, in such a way that each slice of the specific view (A) is different than each other slice of the specific view and (B) is displayed under a different lenticular lens in the radial array than that under which any other slice of the specific view is displayed, and
(iii) under each lenticular lens in the radial array, the screen displays slices of more than one but not all of the views in the set; and

(b) refracting and reflecting light from the display screen in such a way that the light travels through, and is refracted by, the radial array, and then reflects from a radially symmetric mirror to create the automultiscopic display of the 3D object.

2. The method of claim 1 , wherein each particular lenticular lens in the radial array has a constant focal length at all points along a longitudinal axis of the particular lens.

3. The method of claim 1 , wherein:
(a) the radial array has a periphery; and
(b) for each particular lenticular lens in the radial array, width and height of the particular lens each increase as distance to the periphery decreases.

4. The method of claim 1 , wherein the automultiscopic display is viewable throughout an angular region of 360 degrees around the display.

5. The method of claim 1 , wherein the mirror comprises a beam splitter.

6. The method of claim 1 , wherein the mirror has the geometric shape that is a frustum of a cone or of another radially symmetric shape.

7. The method of claim 1 , wherein horizontal diameter of the mirror increases as distance from the radial array increases.

8. The method of claim 1 wherein the refracting is performed in such a way that which slice, out of the slices displayed under a specific lens in the radial array, is visible through the specific lens from a vantage point depends on horizontal angular position of the vantage point relative to the specific lens.

9. The method of claim 1 , wherein the method includes distorting each specific slice of each view in the set, in such a way that the distorting causes the specific slice to be wedge-shaped.

10. The method of claim 1 , wherein the method further comprises:
(a) gathering sensor data regarding behavior of human users; and
(b) modifying the automultiscopic display in response to the behavior.

11. An apparatus comprising:
(a) an electronic display screen;
(b) a radial array of lenticular lenses;
(c) a radially symmetric mirror; and
(d) one or more computers;

wherein
(i) the one or more computers are programmed to cause the display screen to display a set of multiple views of a 3D object, in such way that
(A) each view in the set shows the 3D object from a different angle,
(B) for each specific view in the set, the screen displays multiple slices of the specific view, in such a way that each slice of the specific view (A) is different than each other slice of the specific view and (B) is displayed under a different lenticular lens in the radial array than that under which any other slice of the specific view is displayed, and
(C) under each lenticular lens in the radial array, the screen displays slices of more than one but not all of the views in the set, and

(ii) the mirror and radial array of lenticular lenses are configured in such a way that, when the display screen displays the set of multiple views, light from the display screen travels through, and is refracted by, the radial array, and then reflects from the radially symmetric mirror to create an automultiscopic display of the 3D object.

12. The apparatus of claim 11 , wherein each particular lenticular lens in the radial array has a focal plane that is constant at all points along a longitudinal axis of the particular lens.

13. The apparatus of claim 11 , wherein:
(a) the radial array has a periphery; and
(b) for each particular lenticular lens in the radial array, width and height of the particular lens each increase as distance to the periphery decreases.

14. The apparatus of claim 11 , wherein the automultiscopic display is viewable throughout an angular region of 360 degrees around the display.

15. The apparatus of claim 11 , wherein the mirror comprises a beam splitter.

16. The apparatus of claim 11 , wherein the mirror has the geometric shape that is a frustum of a cone or of another radially symmetric shape.

17. The method of claim 1 , wherein horizontal diameter of the mirror increases as distance from the radial array increases.

18. The apparatus of claim 11 , wherein each slice of each view in the set is wedge-shaped and is a distortion of a rectangular slice of the view.

19. The apparatus of claim 11 , wherein:
(a) the apparatus further includes one or more microphones and one or more cameras; and
(b) the one or more computers are programmed
(i) to analyze audio data captured by the one or more microphones and visual data captured by the one or more cameras, which audio data contains information regarding speech by one or more humans and which visual data includes images of the one or more humans, and
(ii) based on the audio data and the visual data, to cause the display screen to change the 3D object shown in the automultiscopic display.

Assignees

• Massachusetts Inst Technology

Inventors

• Salvador Emily
• Van Belleghem Emily
• Novy Daniel
• Bove Jr Victor Michael

Classifications

• H04N13/368

  for two or more viewers · CPC title

• G02B30/27

  involving lenticular arrays · CPC title

• H04N13/351

  for displaying simultaneously · CPC title

• H04N13/398

  Synchronisation thereof; Control thereof · CPC title

• H04N13/305 Primary

  using lenticular lenses, e.g. arrangements of cylindrical lenses · CPC title