| 摘要 |
The invention provides a linear organic electroluminescent light source which is high in brightness and capable of realizing white color. A brighter light source can be obtained compared with a light source having only one organic electroluminescent element by forming the organic electroluminescent element to have at least one organic layer, which emits light, on both sides of a transparent substrate, and covering the transparent substrate with a mirror which is high in reflectance except one end face of the transparent substrate. When the same brightness as that of a light source having one element is obtained, the power consumption can be suppressed. The light source can thus emit white light.
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