| 摘要 |
PURPOSE:To improve luminance by providing a distance space for irregular reflection between plural surface light source panels, etc. CONSTITUTION:Between a surface light source panel 3 and a surface light panel 3 having a reflection film 10 on the back, the distance space 8 is provided while separating those panels for a distance corresponding to the thickness of the two panels 3 between two fluorescent lamps 11 which are faced each other. Through the air inside of the space 8, the light from a light source scatters and reflects irregularly. As a result, the luminance of the surface light source is improved. In addition, the effect is improved further when protruding an expanded surface of a slope of surface in the distance space. The same is obtained when providing the distance space between the surface light source panel and the reflection panel. |
