Abstract: A light illuminated display board and a lampshade using a light refraction and reflection effect in laminated transparent acrylic plastic plates is disclosed. The plastic plates are precisely cut at their four edge surfaces to form specifically angled and segmented edge surfaces individually having two to five surface segments. At least one of opposite surfaces of each plastic plate is inscribed with desired letters, symbols, figures or a combination of them. The display board or the lampshade of this invention thus clearly displays the desired letters, symbols, figures or the combination of them on its display surface while illuminating them using a variety of color light beams.

Abstract: This display board consists of the transparent acrylic plastic plates in which surface desired letters or pictures are grooved, and a panel made by fitting together a number of the bricks of transparent acrylic plastic. The light receiving edges of the plate, and the light receiving edge and the light emerging edge of the brick are sandpapered in order to make lights enter and emerge from the edge to maximum extent. The light receiving edges of the plates and bricks are colored with a desired to produce a colored light. When light-bulbs with refractors properly positioned at the light receiving edges of the plate and the brick are turned on, the colored lights withthe same color of the dye coloured the edges will emerge from the grooves cut in the plate and from the emerging edge of the brick. For uniform illuminant intensity of the grooves cut in the plate, the depths of grooves are adjusted to be deeper around the center of the plate than around its periphery.