Organic light-emitting substrate, method for manufacturing the same, and organic light-emitting display apparatus having the same

1. An organic light-emitting substrate comprising:

a base substrate including a display area and a peripheral area formed around the display area;

an organic light-emitting diode including a pixel electrode, a common electrode and an organic light-emitting part, the pixel electrode being formed in a unit pixel of the display area, the common electrode being formed over the display area, and the organic light-emitting part being disposed between the pixel electrode and the common electrode;

a driving circuit part which applies driving current to the pixel electrode and is electrically connected to the pixel electrode; and

a common voltage subsidiary line formed on substantially the same layer as the pixel electrode, spaced apart from the pixel electrode, disposed under the common electrode, and electrically connected to the common electrode.

2. The organic light-emitting substrate of claim 1 , wherein the common voltage subsidiary line encloses an outline of a unit block and the unit block includes a plurality of unit pixels.

3. The organic light-emitting substrate of claim 2 , wherein the organic light-emitting part is formed across the plurality of unit pixels.

4. The organic light-emitting substrate of claim 3 , wherein the organic light-emitting part includes a plurality of organic light-emitting parts, each of the plurality of light-emitting parts having a rectangular shape that has a first edge having a first length and a second edge having a second length, and wherein the first and second lengths are respectively in a range from about 5 cm to about 25 cm, and a distance between adjacent organic light-emitting parts is in a range from about 0.4 mm to about 0.6 mm.

5. The organic light-emitting substrate of claim 1 , further comprising a light-blocking pattern formed along an outline of the unit pixel and which blocks light emitted by the light-emitting diode.

6. The organic light-emitting substrate of claim 5 , wherein the light-blocking pattern includes a contact hole formed between the common electrode and the common voltage subsidiary line, wherein the common voltage subsidiary line and the common electrode are electrically connected therethrough.

7. The organic light-emitting substrate of claim 1 , further comprising a common voltage outer line which applies a common voltage to the common voltage subsidiary line, wherein the common voltage outer line is disposed in the peripheral area and is electrically connected to the common voltage subsidiary line.

8. The organic light-emitting substrate of claim 7 , further comprising a protective layer formed on the base substrate covering the driving circuit part, and wherein the organic light emitting diode is formed on the protective layer and is electrically connected to the driving circuit part through a pixel contact hole formed through the protective layer.

9. The organic light-emitting substrate of claim 8 , wherein the common voltage outer line is formed between the protective layer and the base substrate, and the common voltage subsidiary line is formed on the protective layer and is electrically connected to the common voltage outer line through an outer line contact hole formed through the protective layer.

10. The organic light-emitting substrate of claim 1 , wherein the common electrode includes a transparent conductive material, and the pixel electrode includes a reflective electrode which reflects light emitted by the organic light-emitting part.

11. The organic light-emitting substrate of claim 1 , wherein the organic light-emitting part emits white light.

12. The organic light-emitting substrate of claim 11 , wherein the organic light-emitting part includes a red light-emitting material which emits red light, a green light-emitting material which emits green light, and a blue light-emitting material which emits blue light.

13. The organic light-emitting substrate of claim 1 , wherein the common voltage subsidiary line transmits a common electrode voltage and includes a material having lower electrical resistance than the common electrode.

14. An organic light-emitting display apparatus comprising:

an organic light-emitting substrate which emits light;

a opposite substrate facing the organic light-emitting substrate; and

a sealing member enclosing a gap between the organic light-emitting substrate and the opposite substrate,

wherein the organic light-emitting substrate comprises:

a base substrate including a display area and a peripheral area formed around the display area;

an organic light-emitting diode including a pixel electrode, a common electrode and an organic light-emitting part, the pixel electrode being formed in a unit pixel of the display area, the common electrode being formed over the display area, and the organic light-emitting part being disposed between the pixel electrode and the common electrode;

a driving circuit part which applies driving current to the pixel electrode and is electrically connected to the pixel electrode; and

a common voltage subsidiary line formed on substantially the same layer as the pixel electrode, spaced apart from the pixel electrode, disposed under the common electrode, and electrically connected to the common electrode.

15. The organic light-emitting display apparatus of 14 , wherein the organic light-emitting part emits white light, and the opposite substrate includes a color filter.