Print head including an organic light emitting device

A print head comprising:

• a light source having a light irradiation side;
• a driver chip electrically connected to the light source;
• and
• a lens array on the light irradiation side;
• wherein the light source comprises:
• a substrate;
• a plurality of organic light emitting diodes arranged in adjacent groups on the substrate,
• wherein each of the organic light emitting diodes of a group comprises a first electrode, an organic emissive layer, and a second electrode;
• and
• first wires on the substrate connecting each first electrode to a first electrode in an adjacent group;
• a separator between the adjacent groups;
• a plurality of first pads on the substrate, each first pad electrically connected to each first electrode of a first group;
• and
• a plurality of second pads on the substrate, each second pad electrically connected to the second electrode of each group.

A printer device comprising:

• a photosensitive drum having toner;
• a head for irradiating light from a light source onto the photosensitive drum;
• a developer for developing the toner;
• and
• a transferring unit for transferring the toner to a material to be printed,
• wherein the light source comprises:
• a substrate;
• a plurality of organic light emitting diodes arranged in adjacent groups on the substrate,
• wherein each of the organic light emitting diodes of a group comprises a first electrode, an organic emissive layer, and a second electrode;
• and
• first wires on the substrate connecting each first electrode to a first electrode in an adjacent group;
• a separator between the adjacent groups;
• a plurality of first pads on the substrate, each first pad electrically connected to each first electrode of a first group;
• and
• a plurality of second pads on the substrate, each second pad electrically connected to the second electrode of each group.