Method and apparatus for generating 3-D images

Abstract

The present invention aims to provide an apparatus and method for displaying 3D images. The device comprises: a) a screen having angle-dependent scattering characteristics for selectively directing light; b) a screen illumination system comprising: multiple modules of multiple beams on the screen, the modules are arranged so that each point of the screen is illuminated by multiple modules, and the incident beam generated by one module is projected from that module towards several different screens multiple different directions of the point, but also to transfer different incident beams generated by a module from the screen to different emission directions; for using the image information of a single image point in said module, for each incident beam Apparatus for encoding, wherein the 3D image seen by the observer is generated by a plurality of modules; c) a control system for controlling the modules; and d) for imparting an outgoing radiation to the or transmitted through the screen means of the exit beam reflected by the screen, the measure of the exit divergence substantially corresponds to the angle between adjacent emission directions associated with optically adjacent modules to provide a substantially one of the 3D images seen by the observer Continuous motion parallax. The device according to the invention comprises imaging means for generating an incident beam having a convergent portion substantially towards a screen point, wherein the convergence of the incident beam is substantially equal to the exit divergence of the beam exiting the screen. Said modules can be video projectors, LED projectors, light engines of these projectors, etc., which are arranged in a periodically offset manner, preferably along the horizontal direction, and the diffuser screen is used as a holographic screen, a diffractive or an array of refractive elements, a retroreflective surface, or any combination thereof, for an exit beam along at least one direction, preferably imparting a greater divergence along the perpendicular direction to the exit beam, and along the other Direction, the divergence angle provided by the screen is smaller than the angle between adjacent emission directions associated with optically adjacent modules. The invention also aims to provide a method implemented by the device according to the invention.

Description

technical field [0001] The invention relates to a device for displaying 3D images. It is an object of the present invention to improve known 3D generating devices, such as that known from WO 01 / 88598. [0002] In particular, the present invention relates to a device comprising a screen having an angle-dependent scattering characteristic for selectively transferring light; and a screen illumination system. In this device of the invention, the screen illumination system comprises a plurality of modules for generating a plurality of light beams incident on various points of the screen. The modules are arranged so that each point of the screen is illuminated by multiple modules and the light beam generated by one module is projected in different directions from that module towards different points of the screen. The different light beams incident on the screen generated by a module are forwarded from the screen in different emission directions. The device also includes means fo...

AI Technical Summary

Problems solved by technology

This greatly limits the performance of such systems, making it impossible to manufacture high-quality 3D displays

For systems with an achromatic holographic scattering screen, or if other scattering components are used instead of a holographic scattering screen, such as a lenticular lens system, it is difficult to achieve the desired scattering characteristics (see Figure 6B , 7B ), and will cause serious alignment and dispersion problems

This again results in a degradation of the image seen

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