Automatic holographic display device having cholesteric liquid crystal panel with barrier and slit regions and first and second phase difference plates above and below the panel

Abstract

Provided is an automatic holographic display device including: a first liquid crystal panel, a second liquid crystal panel disposed below the first liquid crystal panel, and a backlight that is disposed below the second liquid crystal panel and emits light, wherein the second liquid crystal panel comprises a cholesteric liquid crystal panel in which a barrier region and a slit region are alternately arranged according to an applied electric field, a first phase difference plate disposed above the cholesteric liquid crystal panel, and a second phase difference plate disposed below the cholesteric liquid crystal panel, wherein the backlight comprises a reflection plate that reflects light. The automatic holographic display device includes a modulated cholesteric liquid crystal panel and a phase difference plate, and thus mutual conversion between 2D flat images and 3D holographic images can be easy, the process of manufacturing the device can be simplified, and the manufacturing costs can be decreased. In addition, an automatic holographic display device in which optical transmittance can be improved by the modulated cholesteric liquid crystal panel and the phase difference plates, and luminance reduction that commonly occurs using a parallax barrier method can be prevented is provided.