DISPLAY DEVICE

摘要

An organic EL device comprises a first electrode consisting of light-reflecting material, an organic layer with an organic luminescent layer and acting as a resonator, and a second electrode consisting of a reflective half-transparent layer and a transparent material. To obtain light resonating with a certain spectrum width, L is minimized provided that (2L)/ lambda +sg(f)(2 pi )=m is satisfied, where phi (in radian) is the phase shift appearing when the light from the organic luminescent layer reflects at both ends of the resonator, L is the optical distance of the resonator, and lambda is the peak wavelength of a desired spectrum of light.