摘要 |
<P>PROBLEM TO BE SOLVED: To provide an illumination device in which the illumination device of a thin type is obtained, a light utilization rate and sufficient brightness can be obtained, and brightness distribution is uniform, and a liquid crystal display device using the device at a low cost. <P>SOLUTION: In a direct illumination device 1 composed of a plurality of linear light sources 7 arranged in parallel, the respective linear light sources 7 are covered in the whole width of the longitudinal direction with a brightness adjustment part 8 composed of a transparent resin, a face opposed to the linear light sources 7 of the brightness adjustment part is constituted of a first recessed part of the same nearly semicircular shape as the linear light source 7 in cross section, and a face opposed to a diffusion plate 5 is constituted of a second recessed part of an inverse-triangular shape in cross section. <P>COPYRIGHT: (C)2008,JPO&INPIT |