DIFFUSION LIGHTING DEVICE FOR RADIATING LIGHT FROM TWO SIDES OF A LIGHT GUIDE PANEL

摘要

PURPOSE: A diffusion lighting device for radiating light from two sides of a light guide panel is provided to effectively use light radiated from both main planes of the light guide panel. CONSTITUTION: A light guide panel(11) has at least one optical source at one side. The light guide panel has the first and second main planes which radiate light incident in the light guide panel toward two object lighting bodies. An optical sheet unit(30) has a light diffusion sheet and a light condensing sheet. The optical sheet unit is disposed to cover the entire size of the second main plane. The surface area of a reflective plate(2) is less than the surface area of the second main plane. The reflective plate is installed on the optical sheet unit.