| 摘要 |
PROBLEM TO BE SOLVED: To provide a structural member for a reflecting plate of a surface light source whose changes in dimension after long use are small, whose distortion when used as a reflecting plate is small, and which can maintain high quality images for a long time. SOLUTION: A white film for the reflecting plate of the surface light source is made of white polyester film containing bubbles. The partial melting point of the white polyester film is 60 deg.C or higher but 145 deg.C or lower. |
