Autostereoscopic 3D display device using holographic optical elements

Abstract

An autostereoscopic 3D display device (100) is disclosed. The device includes: a first light source (112) and a second light source (114) configured to alternately generate light (162, 164); and a light guide plate (120) arranged to direct light from the first light source in Light from a second light source is directed in a first direction as a first light beam (172) and in a second direction as a second light beam (174). In the device, a stack (130) of a plurality of holographic optical elements is configured to converge the first light beam and the second light beam from the light guide plate. The stack of multiple holographic optical elements may comprise at least one first holographic optical element (132) and at least one second holographic optical element (134). The light guide plate includes prismatic structures configured to reflect light from the first and second light sources towards a light guide plate surface (1010) of the stack adjacent to the holographic optical element. The prism structure includes at least one first bevel (1032) with a first inclination angle and at least one second bevel (1034) with a second inclination angle, wherein the first and second inclination angles are less than 10°.

Description

technical field [0001] The present disclosure relates to autostereoscopic 3D display devices, and more particularly to autostereoscopic 3D display devices using multiple holographic optical elements (HOEs). Background technique [0002] In recent years, 3D displays for viewing three-dimensional (3D) images have become popular. For example, a movie theater equipped with a 3D display or 3D television may allow viewers to watch 3D movies for an enhanced viewing experience. However, such 3D movies often require viewers to wear 3D glasses or visual aids to perceive the 3D images. The use of such 3D glasses or vision aids may be cumbersome to some viewers due to the weight or discomfort of the devices. [0003] In order to alleviate such inconvenience for viewers, autostereoscopic displays that allow viewers to perceive 3D images without 3D glasses or visual aids have been developed. Conventional autostereoscopic displays usually display 3D images using a spatial multiplexing m...

AI Technical Summary

Problems solved by technology

However, the use of lenses or mirrors may lead to an increase in the size of the 3D display device

In the case of 3D films with prisms, it can be difficult to accurately produce micron-sized 3D films with prisms and to accurately align the 3D films with prisms to light guiding structures

Images