Organic light emitting display
An organic light emitting display is capable of reducing or preventing IR drop in a cathode electrode. An organic light emitting display includes a first substrate and a second substrate. The first substrate has a plurality of pixels located thereon, each of the pixels comprising an organic light emitting diode, wherein a cathode electrode of the organic light emitting diode including a transparent material is located on substantially an entire area of the pixels. The second substrate has a mesh type auxiliary electrode located thereon at a side facing the pixels, the mesh-type auxiliary electrode corresponding to non-emission regions between the pixels and electrically connected to the cathode electrode.
1. An organic light emitting display comprising:
a first substrate having a plurality of pixels located thereon, each of the pixels comprising an organic light emitting diode, wherein a cathode electrode of the organic light emitting diode comprising a transparent material is located on substantially an entire area of the pixels;
a second substrate having a mesh-type auxiliary electrode located thereon at a side facing the pixels, the mesh-type auxiliary electrode corresponding to non-emission regions between the pixels and electrically connected to the cathode electrode; and
a transparent conductive layer contacting an entire area of the second substrate exposed by the auxiliary electrode and contacting the cathode electrode to electrically connect the auxiliary electrode to the cathode electrode.
2. The organic light emitting display as claimed in claim 1 , wherein the auxiliary electrode comprises a conductive black matrix material.
3. The organic light emitting display as claimed in claim 1 , wherein the auxiliary electrode comprises at least one material selected from the group consisting of chrome (Cr), a chrome alloy, molybdenum (Mo), a molybdenum alloy, a chrome oxide (CrOx), a molybdenum oxide (MoOx), and combinations thereof
4. The organic light emitting display as claimed in claim 1 , wherein the auxiliary electrode comprises a material with a lower specific resistance than a material for the cathode electrode.
5. The organic light emitting display as claimed in claim 1 , wherein the transparent conductive layer comprises indium tin oxide (ITO).
6. The organic light emitting display as claimed in claim 1 , wherein the transparent conductive layer contacts the cathode electrode at the non-emission regions between the pixels.
7. The organic light emitting display as claimed in claim 1 , wherein the organic light emitting diode comprises a light emission layer for emitting a red light, a green light, or a blue light.
8. The organic light emitting display as claimed in claim 1 , wherein the organic light emitting diode comprises a light emission layer for emitting a white light.
9. The organic light emitting display as claimed in claim 8 , further comprising red color filters, green color filters, and blue color filters respectively located at openings of the auxiliary electrode to correspond to the pixels.
10. An organic light emitting display comprising:
a first substrate having a plurality of pixels located thereon, each of the pixels comprising an organic light emitting diode comprising a light emission layer for emitting a white light, wherein a cathode electrode of the organic light emitting diode comprising a transparent material is located on substantially an entire area of the pixels;
a second substrate having a mesh-type auxiliary electrode located thereon at a side facing the pixels, the mesh-type auxiliary electrode corresponding to non-emission regions between the pixels and electrically connected to the cathode electrode;
red color filters, green color filters, and blue color filters respectively located at openings of the auxiliary electrode to correspond to the pixels; and
a transparent conductive layer on the auxiliary electrode and the color filters and contacting the cathode electrode to electrically connect the auxiliary electrode to the cathode electrode,
wherein the transparent conductive layer contacts substantially an entire area of the auxiliary electrode and the color filters facing the first substrate.
11. An organic light emitting display comprising:
a first substrate;
a second substrate facing the first substrate with a gap therebetween;
a plurality of organic light emitting diodes (OLEDs) on the first substrate, the OLEDs sharing a common electrode comprising a substantially transparent material, each of the OLEDs comprising a pixel electrode and a light emission layer between the pixel electrode and the common electrode;
a plurality of thin film transistors on the first substrate and electrically connected to the OLEDs;
an auxiliary electrode on the second substrate at non-emission regions between the OLEDs and electrically connected to the common electrode to reduce a resistance across the common electrode; and
a transparent conductive layer contacting an entire area of the second substrate exposed by the auxiliary electrode and contacting the common electrode to electrically connect the auxiliary electrode to the common electrode.
12. The organic light emitting display of claim 11 , wherein the auxiliary electrode is a mesh-type electrode having openings corresponding to the OLEDs.
13. The organic light emitting display of claim 12 , further comprising a plurality of color filters at the openings of the mesh-type electrode.
14. The organic light emitting display of claim 11 , wherein the transparent conductive layer is between the auxiliary electrode and the common electrode.