Flexible light-emitting device including conductive fiber

A flexible light-emitting device comprising:

• a light-emitting complex medium including:
• a first medium layer including a first polymer matrix, and a first nano light-emitting material dispersed therein;
• and
• a second medium layer including a second polymer matrix, and a second nano light-emitting material dispersed therein, wherein the second medium layer is stacked on the first medium layer;
• a plurality of first fiber electrodes extending in a first direction and disposed within the first medium layer, wherein the plurality of first fiber electrodes are arranged along a first imaginary plane and are spaced apart from each other, wherein a first voltage is applied to the plurality of first fiber electrodes;
• a plurality of second fiber electrodes extending in the first direction and disposed within the first medium layer, wherein the plurality of first fiber electrodes are alternated with the plurality of second fiber electrodes, wherein a second voltage different from the first voltage is applied to the plurality of second fiber electrodes;
• and
• a third fiber electrode located within the second medium layer, wherein a third voltage is applied to the third fiber electrode.