| 摘要 |
According to the strength of the leak light from the spot-like light source 12, the light diffusion film 20, the light diffusion co-efficient is changed is disposed between the flat transparent substrate 3 and the light source portion 10, 12. Thereby, by diffusing the strength of the leak light, the incident light to the one side end face 4 of the resin substrate 3 is made approximately even, and the direct entering of the leak light into the flat transparent substrate is suspended and thereby the generation of the bright line is suspended to realize an even and spread illumination.
|
