| 摘要 |
<p>This edge light-type backlight device comprises a light guide plate, a light source disposed at one end part of the light guide plate, a light diffusion sheet and a prism sheet on a light emission face of the light guide plate. The refractive index of the prism sheet exceeds 1.60, a peak of emitted light distribution of a light emission face of the light diffusion sheet in a plane orthogonal to a direction along the one end part of the light guide plate is within an angle range of 48°-58° with respect to a normal direction of the light emission face, and the emitted light of the light emission face of the light diffusion sheet diminishes toward−90° or 90° with respect to the normal line from the angle range of the peak of the emitted light distribution. High frontal brightness and diffusion are realized.</p> |
