Organic light emitting diode display

Abstract

There is provided an organic light emitting diode display including: a substrate having a pixel area and a surrounding area enclosing the pixel area; an OLED formed in the pixel area; an anti-overflowing groove formed in the surrounding area of the substrate; and a dam positioned between the anti-overflowing groove and an end of the substrate.

What is claimed is: 
     
       1. An OLED display, comprising:
 a flexible substrate having a pixel area; 
 a semiconductor layer formed in the pixel area and disposed on the flexible substrate; 
 a substrate having a pixel area and a surrounding area enclosing the pixel area; 
 an OLED formed in the pixel area; 
 an anti-overflowing groove formed in the surrounding area of the substrate; and 
 a dam positioned between the anti-overflowing groove and an end of the substrate, 
 a semiconductor formed in the pixel area; 
 a gate insulating layer formed disposed on the semiconductor and the substrate; 
 a gate electrode formed disposed on the gate insulating layer; 
 a first interlayer insulating layer formed disposed on the gate electrode and the gate insulating layer; 
 a source electrode and a drain electrode formed disposed on the first interlayer insulating layer; 
 a second interlayer insulating layer formed disposed on the source electrode and a the drain electrode; and 
 a first electrode electrically connected to the drain electrode on the second interlayer insulating layer; 
 a pixel defined layer having an opening which is formed and disposed on the second interlayer insulating layer and exposes exposing the first electrode,; 
 wherein the anti-overflowing groove is formed through the first interlayer insulating layer and exposes the gate insulating layer, 
 wherein the OLED includes: a first electrode formed on the second interlayer insulating layer; an organic light emitting layer formed on the first electrode, and a second electrode formed on the organic emission layer, 
 and wherein the dam includes a lower layer made of the same material as the second interlayer insulating layer and an upper layer positioned on the lower layer and made of the same material as the pixel defined layer 
 an organic emission layer disposed on the first electrode; 
 a second electrode disposed on the organic emission layer; 
 a first inorganic insulating layer disposed over the second electrode; 
 an organic insulating layer disposed over the first inorganic insulating layer; 
 a first dam comprised of a pattern of the pixel defined layer disposed along an edge of the flexible substrate; and 
 a first groove disposed through the first interlayer insulating layer between the first dam and the edge of the flexible substrate, wherein the first inorganic insulating layer does not cover over the first groove. 
 
     
     
       2. The OLED display of  claim 1 , further comprising:
 a buffer layer formed disposed on the flexible substrate , 
 wherein the anti-overflowing groove is formed through the first interlayer insulating layer and the gate insulating layer and exposes the buffer layer and the semiconductor layer. 
 
     
     
       3. The OLED display of  claim 1 , wherein further comprising:
 the dam includes a first dam and a second dam positioned at both sides, having the anti-overflowing groove disposed there between 
 a second inorganic insulating layer disposed on the organic insulating layer. 
 
     
     
       4. The OLED display of  claim 3 , wherein:
 the dam further includes a first dam, a second dam, and a third dam having the anti-overflowing groove disposed between the second and third dam wherein the first inorganic insulating layer and second inorganic insulating layer cover over the first dam. 
 
     
     
       5. The OLED display of  claim 1 , further comprising:
 an encapsulation layer positioned on the substrate and covering the pixel area, 
 wherein the encapsulation layer includes at least one inorganic layer and organic layer claim 4, wherein the second interlayer insulating layer is made of an organic layer. 
 
     
     
       6. The OLED display of  claim 1 , further comprising:
 an anti-crack groove positioned between the dam and the end of the substrate wherein the first dam is further comprised of a pattern of the second interlayer insulating layer. 
 
     
     
       7. The OLED display of claim 1, further comprising:
 a second groove disposed between the first dam and the edge of the flexible substrate.   
     
     
       8. The OLED display of claim 7, further comprising:
 a second inorganic insulating layer on the organic insulating layer.   
     
     
       9. The OLED display of claim 8, wherein the first inorganic insulating layer and second inorganic insulating layer cover over the first dam. 
     
     
       10. The OLED display of claim 9, wherein the second interlayer insulating layer is made of an organic layer. 
     
     
       11. The OLED display of claim 10, wherein the first dam is further comprised of a pattern of the second interlayer insulating layer. 
     
     
       12. The OLED display of claim 2, further comprising:
 a second inorganic insulating layer on the organic insulating layer.   
     
     
       13. The OLED display of claim 12, wherein the first inorganic insulating layer and second inorganic insulating layer cover over the first dam. 
     
     
       14. The OLED display of claim 13, wherein the second interlayer insulating layer is made of an organic layer. 
     
     
       15. The OLED display of claim 14, wherein the first dam is further comprised of a pattern of the second interlayer insulating layer. 
     
     
       16. The OLED display of claim 15, wherein the first dam is further comprised of a pattern of the gate insulating layer. 
     
     
       17. The OLED display of claim 16, further comprising:
 a second dam comprised of the same layers of the first dam is disposed between the first dam and the edge of the flexible substrate.   
     
     
       18. The OLED display of claim 17, wherein the second dam is covered by the first inorganic layer and the second inorganic layer. 
     
     
       19. The OLED display of claim 18, wherein a third groove is disposed between the first dam and second dam. 
     
     
       20. The OLED display of claim 19, wherein the first dam and the second dam are further comprised of patterns of the first interlayer insulating layer. 
     
     
       21. The OLED display of claim 1, further comprising:
 a connecting member electrically connected to the second electrode.   
     
     
       22. The OLED display of claim 21, further comprising:
 a second inorganic insulating layer on the organic insulating layer.   
     
     
       23. The OLED display of claim 22, wherein the first inorganic insulating layer and the second inorganic insulating layer cover over the first dam and the connecting member. 
     
     
       24. The OLED display of claim 23, wherein the second interlayer insulating layer is made of an organic layer. 
     
     
       25. The OLED display of claim 24, wherein the first dam is further comprised of a pattern of the second interlayer insulating layer. 
     
     
       26. The OLED display of claim 1, wherein the first groove disposed through the gate insulating layer and the first interlayer insulating layer exposes a portion of a buffer layer disposed on the flexible substrate between the dam and the edge of the flexible substrate. 
     
     
       27. The OLED display of claim 1, further comprising:
 a second dam comprised of the same layers of the first dam disposed between the first dam and the pixel area, wherein the second dam is completely covered by the organic insulating layer.