| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device for radiating illumination light with less luminance irregularity using a light source higher in luminous efficiency, longer in emission life, higher in productivity, lower in manufacturing cost, and lower in occurrence frequency of faults due to external factors than a light source using an OLED.SOLUTION: A pair of blinds 10 and 20 that include a plurality of louvers 11 and 21 and can individually manipulate lift positions and rotation angles of the louvers 11 and 21 are provided to face each other in a space 30 of a predetermined length therebetween, and an LED light source 3 is disposed in an upper portion of the space 30 so that the space 30 can serve as a light guide space for guiding emitted light from the LED light source 3. By individually manipulating the lift positions and the rotation angles of the louvers 11 and 21 of the paired blinds 10 and 20, the light emitted from the LED light source 3 and guided into the light guide space 30 is subjected to optical path control so that the light is radiated as irradiation light. |
