| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem that light utilization efficiency is low since returning light in a light guide plate is attenuated and absorbed in a primary light source storage region. <P>SOLUTION: A white color high reflection layer 101 is formed so as to surround an LED at both ends of a light incident end face of a color mixture region R1 of the light guide plate. On the other hand, a white color high reflection layer 103 is formed at a terminal end of an overhang portion 102 overhung so as to surround an LED by extending with an identical material as a light guide plate at both ends of an incident end face of a color mixture region R1 of the light guide plate On the other hand, a mirror face high reflection layer 105 composed of a metal thin film, for example, silver (Ag) or aluminum (Al) is formed at the terminal end of an overhang portion 104 overhung so as to surround an LED by extending with an identical material as the light guide plate at the both ends of the light incident end face of the color mixture region R1 of the light guide plate. <P>COPYRIGHT: (C)2012,JPO&INPIT |
