Organic light emitting diode display
An organic light emitting diode display including: a substrate; pixel electrodes formed on the substrate; a pixel defining layer having openings exposing the plurality of pixel electrodes, formed on the substrate; spacers formed on the pixel defining layer; organic emission layers formed on the pixel electrodes; a common electrode formed on the organic emission layers; and color filters formed on the common electrode, in the openings of the pixel defining layer.
1. An organic light emitting diode display, comprising:
a substrate;
a sealing member;
pixel electrodes disposed on the substrate between the sealing member and the substrate;
a pixel defining layer disposed on the substrate, having openings to expose the pixel electrodes;
spacers disposed between the pixel defining layer and the sealing member to separate the sealing member from the pixel defining layer and to disperse reflected ambient light;
organic emission layers disposed on the pixel electrodes;
a common electrode disposed on the organic emission layers and the spacers, wherein an entire top surface of the common electrode on a top surface of the spacer contacts the sealing member; and
color filters disposed on and contacting the common electrode in the openings of the pixel defining layer, and separated from the sealing member.
2. The organic light emitting diode display of claim 1 , wherein in each of the openings, the corresponding organic emission layer emits a color of light that is not absorbed by the corresponding color filter.
3. The organic light emitting diode display of claim 1 , wherein the organic emission layers emit white light.
4. The organic light emitting diode display of claim 1 , wherein the spacers have at least one portion that has a shape selected from a truncated pyramid, a prism, a truncated circular cone, a cylinder, a hemisphere, and a semi-oblate sphere.
5. The organic light emitting diode display of claim 1 , wherein the spacers maintain a space between the substrate and the sealing member.
6. The organic light emitting diode display of claim 1 , wherein the spacers and the pixel defining layer are integrally formed, using the same material and process.
7. The organic light emitting diode display of claim 1 , wherein:
the common electrode comprises a first metal layer and a second metal layer disposed directly on the first layer; and
the first metal layer and the second metal layer each comprise at least one metal independently selected from magnesium (Mg), silver (Ag), calcium (Ca), lithium (Li), chromium (Cr), and aluminum (Al).
8. The organic light emitting diode display of claim 7 , wherein:
the first metal layer comprises silver (Ag); and
the second metal layer comprises at least one selected from an alloy of magnesium and silver (Mg:Ag), aluminum (Al), calcium (Ca), lithium (Li), and chromium (Cr).
9. An organic light emitting diode display, comprising:
a substrate;
a sealing member;
pixel electrodes disposed on the substrate between the substrate and the sealing member;
a pixel defining layer disposed on the substrate, having openings to expose the pixel electrodes;
spacers disposed between the pixel defining layer and the sealing member to separate the sealing member from the pixel defining layer and to disperse reflected ambient light;
organic emission layers disposed on the pixel electrodes;
a common electrode disposed on the organic emission layers and the spacers, wherein an entire top surface of the common electrode on a top surface of the spacer contacts the sealing member, comprising,
a first layer comprising silver (Ag), and
a second layer comprising at least one selected from an alloy of magnesium and silver (Mg:Ag), aluminum (Al), calcium (Ca), lithium (Li), and chromium (Cr); and
color filters formed on and contacting the common electrode in the openings of the pixel defining layer, and separated from the sealing member.
10. The organic light emitting diode display of claim 9 , wherein the first layer is disposed directly on the second layer, and the second layer is disposed directly on the emission layers.
11. The organic light emitting diode display of claim 9 , wherein in each of the openings, the corresponding organic emission layer emits a color of light that is not absorbed by the corresponding color filter.
12. The organic light emitting diode display of claim 9 , wherein the spacers each have at least one portion that has a shape selected from a truncated pyramid, a prism, a truncated circular cone, a cylinder, a hemisphere, and a semi-oblate sphere.
13. The organic light emitting diode display of claim 9 , wherein the organic emission layers emit white light.
14. The organic light emitting diode display of claim 1 , further comprising a planarization layer disposed on the substrate,
wherein the pixel electrodes and the pixel defining layer are both disposed directly on the planarization layer.
15. The organic light emitting diode display of claim 14 , further comprising:
a buffer layer disposed directly on the substrate;
a gate insulating layer disposed directly on the buffer layer, and
an interlayer insulating layer disposed directly on the gate insulating layer,
wherein the planarization layer is disposed directly on the interlayer insulating layer.
16. The organic light emitting diode display of claim 1 , wherein the common electrode comprises:
a first portion between the color filters and the pixel defining layer; and
a second portion between the organic emission layers and the sealing member,
wherein the first portion of the common electrode is closer to the sealing member than the second portion.
17. The organic light emitting diode display of claim 7 , wherein the second metal layer covers substantially all of a surface of the first metal layer facing the sealing member.
18. The organic light emitting diode display of claim 1 , wherein the spacers being configured to maintain a gap between the substrate and the sealing member by holding the common electrode against the sealing member.
19. The organic light emitting diode display of claim 9 , wherein the spacers being configured to maintain a gap between the substrate and the sealing member by holding the common electrode against the sealing member.