| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a planar lighting system capable of restraining and improving the generation of luminance unevenness around a light-incident part even if the size of a light-irradiating face of a light guide plate is enlarged. <P>SOLUTION: The planar lighting system is provided with a light guide plate having a light-irradiating face, a pair of light-incident faces formed at both end sides of the light-irradiating face, a pair of side faces formed at the other end side of the light-irradiating face, and a rear face formed at the opposite side of the light-irradiating face, slanted so as to be thicker in a direction vertical to the light-irradiating face gradually toward the center of the light-irradiating face from each light-incident face, and composed of a pair of slanted faces jointed between the first light-incident faces, and a pair of main light sources arranged in opposition to each light-incident face. The light guide plate is formed no that scattered particles for scattering light are kneaded and dispersed with a density Npi of the scattered particles in a space area within a given range of the light guide plate directing toward the center of the light guide plate from the light-incident face and a density Np of the scattered particles in the other space area of the light guide plate satisfying Npi>Np. <P>COPYRIGHT: (C)2009,JPO&INPIT |
