| 摘要 |
<p>PROBLEM TO BE SOLVED: To illuminate a user operation part without making power saving to be incomplete by use of a backlight and to efficiently use a part of light for backlight leaked from an irregular reflection board. SOLUTION: The light for backlight leaked from the reflection board 5 to irregularly reflect the light for backlight to illuminate an LCD 1 to the rear side is collected by an aspherical lens 7. The light collected by the lens 7 is guided to an illuminating object by optical fibers 9, 12. The backlight to necessarily leak and to be naturally wasted is naturally used by the reflection board 5. Positive increase of leakage quantity of the light more than light quantity to essentially leak is not denied. An extended part 12 of the optical fiber 9 is a side irregular reflection type and made into a light source at an optional position.</p> |
