| 摘要 |
PROBLEM TO BE SOLVED: To improve visibility by using first and second coloring agents having a visible-light transmittance lower than that of a third coloring agent and providing a third light emitting diode at a position where light blocking efficiency is higher than the positions of first and second light emitting diodes. SOLUTION: A blue (B) coloring agent has a visible-light transmittance higher than that of green (G) and red (R) coloring agents. When a blue light emitting diode is partially irradiated with light, it shows remarkable reflection effect. A print substrate, where a plurality of light emitting diodes 102 are provided and electrically connected, is placed in a resin case as a box 104 and sealed by filling agent 103. Each light emitting diode 102 is colored at its mold member in correspondence with light emitted from an LED chip. A light blocking member 101 is formed on the upper end surface of the resin case. By providing the light emitting diode having the coloring agent with a high visible-light transmittance and short-wave side light-emission wavelength on the light blocking member side, light emitting characteristic is maintained and gold color balance is obtained, thus, visibility can be improved. |
