Abstract: Disclosed herein is a 3D light board. The 3D light board includes a frame, a light emitting module coupled to a front side of the frame and including light emitting diodes emitting light in response to a signal from a controller, and a 3D filter provided to a front side of the light emitting module to polarize light emitted from the light emitting diodes.

Abstract: The present invention relates to a head mounted display that is constructed such that stereoscopic images can be seen on a liquid crystal display screen disposed adjacent to two human eyes.

Abstract: The present invention relates to a head mounted display that is constructed such that stereoscopic images can be seen on a liquid crystal display screen disposed adjacent to eyes. The present invention provides an optical system for a head mounted display, comprising a light source; an illuminating prism for controlling an optical path of light rays from the light source by reflecting and refracting the light rays; a polarizer for polarizing the light rays emitted from the illuminating prism; a polarization beam splitter for reflecting the polarized light rays emitted from the polarizer; a frontlight liquid crystal display screen on which images are displayed by means of the light rays reflected by the polarization beam splitter; and a free-form-surface prism disposed in front of the polarization beam splitter for magnifying the images on the liquid crystal display screen by reflecting and converging the light rays emitted from the liquid crystal display screen.