| 摘要 |
PROBLEM TO BE SOLVED: To provide an illumination device and illumination system capable of appropriately changing color temperature.SOLUTION: An illumination device 10, in adjusting its color temperature, can output color temperature to the limit of dimming degree of a bulb color LED 15 since thinned-out lighting control is performed on the bulb color LEDs 15 out of the bulb color LEDs 15 and daylight color LEDs 16 when a dimming degree for the bulb color LEDs 15 becomes lower than a lower limit value. The illumination device 10, in adjusting its color temperature, can output color temperature to the limit of dimming degree of a daylight color LED 16 since thinned-out lighting control is performed on the daylight color LEDs 16 out of the bulb color LEDs 15 and the daylight color LEDs 16 when a dimming degree for the daylight color LEDs 16 becomes lower than a lower limit value. Thereby, the illumination device 10 can generate illumination light having mixed light color of bulb color and daylight color corresponding to color temperature in a range wider than that of the conventional device.SELECTED DRAWING: Figure 1 |
