Convertible display screen and its three-dimensional display device

Abstract

The invention discloses a transformable display screen and a 3D display device thereof. The transformable display screen switches between a reflective type and a transmissive type. The reflective transformable display screen is composed of a polymer-dispersed liquid crystal layer, a transmissive directing diffuser screen, and a reflector, or alternatively composed of a polymer-dispersed liquid crystal layer and a reflective directing diffuser screen; and the transmissive transformable display screen is composed of a polymer-dispersed liquid crystal layer and a transmissive directing diffuser screen. The 3D display device based on the transformable display screen comprises a high-speed projector, a reflector system, and a transformable display screen, and is capable of switching between spatial volumetric 3D display and spatial panoramic parallax 3D display. With no electric field being applied, the polymer-dispersed liquid crystal layer is ivory-white and severs as a projection diffuser screen to realize volumetric 3D display; and under an electric field being applied, the polymer-dispersed liquid crystal layer is transparent, thereby realizing panoramic parallax 3D display. The two types of 3D display can both fulfill the requirement from an adequate number of viewers for 360 DEG naked-eye observation, and can be switchably realized with complementary advantages favoring observation and locating of 3D spatial objects.

Description

technical field [0001] The invention relates to an optical device, in particular to a convertible display screen and a three-dimensional display device thereof. Background technique [0002] Three-dimensional display technologies mainly include holographic three-dimensional display, volumetric three-dimensional display, and stereoscopic three-dimensional display. Holographic three-dimensional display requires high-resolution and high-speed spatial light modulators in dynamic display, which cannot meet the reproduction requirements of dynamic holographic three-dimensional images at present. The volumetric 3D display technology is to address in the three-dimensional space, control the brightness of the corresponding voxel, and finally scan out the three-dimensional object in the three-dimensional space. There are two kinds of volumetric display screens: vertical plane and helical plane. The volumetric three-dimensional display has horizontal and vertical parallax, 360° horiz...

AI Technical Summary

Problems solved by technology

Since the light-emitting direction and light-emitting solid angle of each individual pixel cannot be controlled when scanning in a three-dimensional space, there must be a problem of perspective blanking in space display, that is, the front and back of a three-dimensional object are visible at the same time

This is not consistent with our usual visual effect, and it will cause the front and rear views to overlap and cause confusion

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