| 摘要 |
Between the transparent substrate 2 and the light source portion 4, the light diffusion film 20 to diffuse the light as the light diffusion layer is interposed. Thereby, the lights emitted from the light source 4 different in brightness, due to the diffusion during progressing in the light diffusion film 20, at the process of entering the transparent substrate 2, becomes even in brightness, and is suspended in the generation of the stripe pattern of light and shade, as a result a spread and even illumination can be realized.
|
