| abstract |
A light diffusing plate (2a) integrally formed with an optical element array (1, 1') on the front and rear surfaces thereof, and a directly-below type lighting device having this light diffusing plate installed on a light reflection plate (3) having a box type shape and provided therein with a light source (4), whereby a light diffusing plate and a thin directly-below type lighting device are provided which eliminate luminance non-uniformity among a number of light sources (inter-light-sources distance) at a practical level (making luminance uniform), and realize higher luminance (delivering luminance equal to that when conventional prism sheets are laminated). |