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A light field display method and light field display engine

A display method and light field technology, which is applied in optics, optical components, instruments, etc., can solve problems such as inaccessibility of three-dimensional images, unstable structure, and danger of large screens, so as to simplify the light field display method, improve safety, high resolution effects

Active Publication Date: 2021-09-07
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 3D image of this system is displayed on the high-speed rotating optical screen, the 3D image cannot be penetrated, which is not conducive to interaction, and the system is huge, the structure is unstable, and the large screen moving at high speed still has certain dangers

Method used

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  • A light field display method and light field display engine
  • A light field display method and light field display engine
  • A light field display method and light field display engine

Examples

Experimental program
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Effect test

Embodiment 1

[0027] This embodiment provides a light field display method and a light field display engine,

[0028] Such as figure 1 shown. A light field display engine includes a projector 1, a vibrating mirror 2 and a controller 3, and the controller 3 is connected to the control circuits of the projector 1 and the vibrating mirror 2. The vibrating mirror 2 is a two-dimensional micro-electromechanical system (MEMS) vibrating mirror, which can be along such as figure 1 Two orthogonal directions X and Y are shown scanning back and forth. The reflected light rays of the projector 1 can independently and continuously scan around the X and Y axes within the range of angles θ and Φ. The projector 1 sequentially projects a sequence of two-dimensional image information to the vibrating mirror 2 in time sequence, the two-dimensional image sequence is encoded with the perspective information of the three-dimensional image within the specified viewing angle range, and the vibrating mirror 2 con...

Embodiment 2

[0031] This embodiment provides a light field display method and a light field display engine, such as figure 2 shown. A light field display engine, including a projector 1, a galvanometer 2, a controller 3, and a symmetrical scattering screen 5; the galvanometer 2 is composed of two-dimensional independent galvanometer galvanometers, and one dimension The galvanometer scans around the X-axis, that is, the X-axis galvanometer 2-1, and the scanning angle will be θ; the other dimension galvanometer scans around the Y-axis, that is, the Y-axis galvanometer 2-2, and the scanning angle is θ. The angle is Φ. The controller 3 is connected to the control circuits of the projector 1 and the vibrating mirror 2 . The projector 1 sequentially projects a sequence of two-dimensional image information to the vibrating mirror 2 in time sequence, the two-dimensional image information sequence is encoded with perspective information of a three-dimensional image within a specified viewing ang...

Embodiment 3

[0033] This embodiment provides a light field display method and a light field display engine, such as image 3 , Figure 4 shown. A light field display engine includes a projector 1, a one-dimensional galvanometer, a controller 3 and an asymmetric scattering screen 6. The one-dimensional vibrating mirror is a one-dimensional galvanometer vibrating mirror scanning around the Y-axis, that is, the Y-axis vibrating mirror 2-2, and the scanning angle is Φ. The controller 3 is connected to the control circuit of the projector 1 and the Y-axis vibrating mirror 2-2. Specifically, in this implementation, the asymmetric scattering screen 6 has an asymmetric scattering characteristic, such as Figure 4 As shown, the light 7 passing through the asymmetric scattering screen 6 diffuses at a large angle along the y-axis direction of the asymmetric scattering screen 6, and diffuses at a small angle along the x-axis direction of the asymmetric scattering screen 6, forming a light Diffuse ...

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Abstract

The present invention relates to the field of display, in particular to a light field display method and a light field display engine. A projector sequentially projects a sequence of two-dimensional image information within a specified viewing angle range in a time sequence, and the sequence of two-dimensional image information is reflected and scanned by a vibrating mirror. Projected into the space corresponding to the viewing angle range, the reflection angle of the vibrating mirror corresponds to the viewing angle of the two-dimensional image one by one, when the vibrating mirror scans to the specified angle position, the projector synchronously projects the two-dimensional image information corresponding to the angle of view The controller controls the vibrating mirror to scan back and forth within the set angle, and at the same time coordinates the timing of the projector, and synchronously projects two-dimensional image information corresponding to the viewing angle range according to the scanning angle of the vibrating mirror, thereby forming a three-dimensional image in space. The light field display method of the present invention can obtain a three-dimensional image with high resolution, large depth of field, and large viewing angle, and has high safety factor, small system volume, and convenient calibration.

Description

technical field [0001] The invention relates to the display field, in particular to a light field display method and a light field display engine. Background technique [0002] Different from the 3D film and 3D TV technology currently on the market, the light field display technology can reconstruct the 3D information of objects in space, and can provide a 3D image that is close to nature without obvious visual fatigue problems. It is a true 3D display technology. technology. Compared with holographic display technology, light field display requires less auxiliary calculation and does not require coherent light illumination, so it is considered to be a promising three-dimensional display technology. Current light field display technologies mainly include stacked light field displays, projection array light field displays, integrated imaging light field displays, and dynamic light field displays. These light field display technologies have their own advantages, but they als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B30/54G02B26/10G03B35/18
Inventor 楼益民吴锋民胡娟梅
Owner ZHEJIANG SCI-TECH UNIV