| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a inexpensive and light-weighted surface light source device in which accurate and a highly efficient light guide is realized by simple and easy constitution. <P>SOLUTION: In a surface light source device (LB), a light guide plate (210) makes light (L) guided from incident face (211) propagate on whole face while repeating total reflection between a reflection face (213) and emission face (212) facing each other, and planar illumination is carried out by emitting from the emission face (212) by making one part of the light scatter, and it is emitted from the emitting face (212). A reflector integral type reflecting sheet (RFS) which is arranged at the reflecting face (212) and has a diffusion reflecting face (271) which diffuses and reflects the light (L), and has an opening (O) which surrounds the light source (220) and corresponds to the incident face (211), and a mirror face reflecting face (272) are integrally formed, and efficiently introduce the emitted light (L) from the light source into the inside of the light guide plate (210). <P>COPYRIGHT: (C)2007,JPO&INPIT |
