| 摘要 |
PROBLEM TO BE SOLVED: To provide an illuminating device that is able to adjust the illuminance and color temperature of emitted light, the illuminating device allowing for long time viewing work by making eyes less tired even when illuminance is increased to improve the ease of reading characters, and also saving energy.SOLUTION: An illuminating device 1 comprises: a first light source part 2 that emits light of a predetermined color temperature; a second light source part 3 that emits light of color temperature different from the first light source part 2; and a control part 4 that dimmer-controls the light source parts 2, 3 independently. The control part 4 adjusts the output ratio between the light source parts 2, 3 such that illuminance of light emitted from the illuminating device 1 and the color temperature change in inverse correlation. In this configuration, the color temperature decreases as illuminance increases and, therefore, glare of emitted light is restricted even when the illuminance is increased in order to improve ease of reading letters. Accordingly, eyes feel less tired, enabling long-time viewing work. Additionally, since the color temperature increases as the illuminance decreases, energy can be saved by decreasing the illuminate while maintaining the ease of reading characters. |
