Patent ID: 7196469

Claim:
An OLED microcavity device that has at least one first pixel that emits light in a desired region of the visible light spectrum, comprising: a) one or more light-emitting layer(s); b) a reflector and a semitransparent reflector respectively disposed on opposite sides of the light-emitting layer(s) and arranged to define a microcavity that resonates light produced by such layers such that the light produced by the at least one first pixel has a spectral component in the desired region of the visible light spectrum; c) at least one layer disposed at a predetermined position between the reflector and the semitransparent reflector which undesirably absorbs light in at least a portion of the desired region of the visible light spectrum; and d) wherein the predetermined position of the undesirably absorbing layer is selected in accordance with the following equation: [ n a d a +2Σ( n i d i )]/λ 0 +φ r /(2π)=m+½ wherein: n a is the index of refraction and d a is the thickness of the undesirably absorbing layer; n i is the index of refraction and d i is the thickness of the ith layer between the undesirably absorbing layer and the reflector; φ r is the phase shift in radians at the reflector interface, chosen by convention to lie in the interval between −π and π; λis the resonant wavelength of the microcavity and corresponds with the primary wavelength emitted by the microcavity device; and m is within 0.25 of an integer value.