| 摘要 |
An electroluminescent device comprising: a luminous layer provided between a first electrode and a second electrode; and a reflective layer provided on the first electrode side for reflecting light emitted from the luminous layer and emitting the light from said second electrode side; wherein an optical distance L<SUB>1 </SUB>between a light-emitting position of the luminous layer and the reflective layer is determined so as to allow the light with wavelength lambda, which is center wavelength of the emitted light to be taken out, to increase in intensity as a result of interference, and wherein an optical distance L<SUB>2 </SUB>between a reflective interface at the device end portion on the second electrode side and the reflective layer is determined so as to allow the light with wavelength lambda to decrease in intensity as a result of interference.
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