| 摘要 |
PROBLEM TO BE SOLVED: To enable a light source to emit light with satisfactory luminance, achieve a longer life, and allow the color of the emitted light to be adjusted or changed as necessary in an organic electroluminescent (EL) light source device and a lighting system. SOLUTION: The organic EL light source device 30 comprises a plurality of organic EL light sources 20 in each of which an organic EL element 10 having at least one light emitting layer 2 between electrodes 1 is formed on a translucent substrate 3. Each of the light sources 20 is subjected to a light extraction treatment performed on some portion thereof, and they are stereoscopically arranged so that light emissions from the respective light sources 20 be available in a mixed form. Since the light emissions from the respective light sources 20 are available in a mixed form, satisfactory luminance as a light source is achieved for the emitted light. Furthermore, the color of the emitted light can be adjusted or changed as necessary by adjusting the light sources 20. Furthermore, each of the light sources 20 is replaceable alone when it has reached the end of its life, and this can prolong the life of the organic EL light source device 30 and the lighting system. COPYRIGHT: (C)2006,JPO&NCIPI
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