PRINT HEAD INCLUDING AN ORGANIC LIGHT EMITTING DEVICE
A print head includes a light source, a driver chip electrically connected to the light source and a lens array on the side of light irradiation of the light source. The light source includes a substrate and a plurality of organic light emitting diodes arranged in adjacent groups on the substrate. Each of the organic light emitting diodes of a group includes a first electrode, an organic emissive layer, and a second electrode. First wires on the substrate connect each first electrode to a first electrode in an adjacent group. A separator is located between the adjacent groups. A first pad on the substrate is electrically connected to each first electrode of each of the organic light emitting diodes of a first group and a plurality of second pads are located on the substrate, each second pad electrically connected to the second electrode of each group.
1 . An organic light emitting device comprising:
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.
2 . The organic light emitting device of claim 1 , wherein the second electrodes of the organic light emitting diodes of each group are integral with each other.
3 . The organic light emitting device of claim 1 ,
wherein the first electrodes of the organic light emitting diodes of each group are arranged linearly; and
wherein the first electrodes of one group are connected by first wires in bilateral symmetry with the first electrodes of an adjacent group.
4 . The organic light emitting device of claim 1 , wherein the organic light emitting diodes are arranged linearly.
5 . The organic light emitting device of claim 1 , further comprising an insulating layer on the substrate covering the first electrodes and first wires, the insulating layer comprising a plurality of openings,
wherein an organic light emitting diode is placed in each opening.
6 . 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.
7 . The print head of claim 6 , wherein the second electrodes of the organic light emitting diodes of each group are integral with each other.
8 . The print head of claim 6 ,
wherein the first electrodes of the organic light emitting diodes of each group are arranged linearly; and
wherein the first electrodes of one group are connected by first wires in bilateral symmetry with the first electrodes of an adjacent group.
9 . The print head of claim 6 , wherein the organic light emitting diodes are arranged linearly.
10 . The print head of claim 6 , further comprising an insulating layer on the substrate covering the first electrodes and first wires, the insulating layer comprising a plurality of openings,
wherein an organic light emitting diode is placed in each opening.
11 . The print head of claim 6 , wherein the driver chip is attached to the substrate by a conductive adhesive and is electrically connected to at least one of the first pad and the plurality of second pads.
12 . 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.
13 . The printer device of claim 12 , wherein the second electrodes of the organic light emitting diodes of each group are integral with each other.
14 . The printer device of claim 12 ,
wherein the first electrodes of the organic light emitting diodes of each group are arranged linearly; and
wherein the first electrodes of one group are connected by first wires in bilateral symmetry with the first electrodes of an adjacent group.
15 . The printer device of claim 12 , wherein the organic light emitting diodes are arranged linearly.
16 . The printer device of claim 12 , further comprising an insulating layer on the substrate covering the first electrodes and first wires, the insulating layer comprising a plurality of openings,
wherein an organic light emitting diode is placed each opening.
17 . The printer device of claim 12 , further comprising a driver chip attached to the substrate by a conductive adhesive and electrically connected to at least one of the first pad and the plurality of second pads.