STACKED ORGANIC ELECTROLUMINESCENT DEVICES

摘要

A light-emitting device comprises a stack of organic electroluminescent (EL) elements (100, 200), wherein an organic EL element in the stack overlaps at least a portion of another organic EL element, and the organic EL elements are electrically separate (50). Each of the organic EL elements of the stack is activated with a different level of voltage (110, 210).