| 摘要 |
PURPOSE:To form a back light which has a high power consumption and brightness converting efficiency, and a high light directivity. CONSTITUTION:To the side end of a light leading plate 1 which consists of a light transmissiible material, a linear light source 4 close to the light leading plate 1 is provided, and a sheet which consists of a light transmissible material having minute and numerous lenses 7 on the same surface is provided to the light output surface side of the light leading plate 1, making the focus positions of the lenses 7 coincident near the parts 6 having the light diffusing function of the light leading plate 1. |
