| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device capable of reducing the number of LEDs by sharing a light source for a guard lamp which can be used at the normal time and a light source for a power failure lamp which is lighted during the power failure.SOLUTION: In a lighting device having a main LED and an auxiliary LED, the auxiliary LED is one LED and operated as a light source for a guard lamp to be used during the normal time and a light source for a power failure lamp to be used during the power failure.SELECTED DRAWING: Figure 8 |
