| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat light emission light source using a guide plate for use in a liquid crystal backlight, panel meter, indication lamp, flat light emitting switch, etc., capable of leading the light with a high brightness and with less deviation in the brightness in particular without risk that the light fed from the light source is absorbed inside the guide plate. SOLUTION: A flat light emission device is equipped with a rectangular guide plate structured so that a diffusive material 103 is included in a transmissive guide 102, the material 103 having a refractive index different from the guide 102, and a light emitting diode connected optically with the end face of the guide plate for emitting light from its main surface. In particular, the guide 102 and diffusive material 103 are both made of transmissive resin, and the interface 101 between them is inclined in terms of composition from the resin constituting the diffusive material to the resin forming the guide. |
