Capacitor device, organic light emitting display apparatus including the capacitor device, and method of manufacturing the organic light emitting display apparatus

Abstract

A capacitor device includes two top capacitor electrodes separated from each other and symmetrical to each other, two intermediate capacitor electrodes symmetrical to each other and respectively overlapping the top capacitor electrodes, a bridge coupling the intermediate capacitor electrodes without overlapping the top capacitor electrodes, and a driving voltage line coupled to the bridge and configured to apply a common voltage to the intermediate capacitor electrodes.

What is claimed is: 
     
       1. An organic light emitting display apparatus comprising:
 two pixels symmetrical to each other, located on a substrate, and adjacent each other in a first direction, each of the pixels comprising a pixel circuit and an organic light emitting diode (OLED); 
 two top capacitor electrodes separated from each other and symmetrical to each other, each of the top capacitor electrodes being respectively located in one of the pixel circuits; 
 two intermediate capacitor electrodes symmetrical to each other and insulated from, and overlapping with, the top capacitor electrodes; 
 a bridge coupling the intermediate capacitor electrodes without overlapping the top capacitor electrodes; and 
 a driving voltage line coupled to the bridge, and configured to apply a common voltage to the intermediate capacitor electrodes. 
 
     
     
       2. The organic light emitting display apparatus of  claim 1 , wherein an entirety of each of the top capacitor electrodes overlaps with a respective one of the intermediate capacitor electrodes. 
     
     
       3. The organic light emitting display apparatus of  claim 1 , further comprising two bottom capacitor electrodes symmetrical to each other and located below the intermediate capacitor electrodes, the bottom capacitor electrodes being insulated from, and overlapping with, the intermediate capacitor electrodes. 
     
     
       4. The organic light emitting display apparatus of  claim 3 , further comprising a contact node electrically coupling the bottom capacitor electrodes to each other, and electrically coupling the top capacitor electrodes to each other, via storage opening portions defined by the top capacitor electrodes, and by the intermediate capacitor electrodes, to expose the bottom capacitor electrodes. 
     
     
       5. The organic light emitting display apparatus of  claim 4 , wherein the contact node is configured to apply an initialization voltage during an initialization period. 
     
     
       6. The organic light emitting display apparatus of  claim 3 , further comprising a driving thin film transistor (TFT) comprising:
 a gate electrode that is the bottom capacitor electrodes; and 
 an active layer insulated from the bottom capacitor electrodes. 
 
     
     
       7. The organic light emitting display apparatus of  claim 1 , wherein the driving voltage line comprises:
 a plurality of first driving voltage lines extending in a second direction crossing the first direction and configured to apply the common voltage to the pixels; and 
 a second driving voltage line coupled to the bridge and extending in the first direction. 
 
     
     
       8. The organic light emitting display apparatus of  claim 7 , wherein the plurality of first driving voltage lines and the second driving voltage line comprise a mesh structure configuration. 
     
     
       9. The organic light emitting display apparatus of  claim 7 , wherein the first driving voltage lines are separated from one another and arranged symmetrically. 
     
     
       10. An organic light emitting diode display comprising:
 a substrate;   a first scanning line on the substrate;   a first data line crossing the first scanning line;   a first driving voltage line crossing the first scanning line;   a first thin film transistor electrically coupled to the first scanning line and the first data line;   a second thin film transistor electrically coupled to a first driving voltage line and the first thin film transistor, the second thin film transistor comprising a first gate electrode and a first active layer including a curved portion that is under and overlapping the first gate electrode;   a first organic light emitting diode electrically coupled to the second thin film transistor;   a third thin film transistor electrically coupled the first organic light emitting diode and the second thin film transistor;   an insulating layer covering the second thin film transistor; and   a first storage capacitor electrically coupled to the first gate electrode of the second thin film transistor, the first storage capacitor comprising a first capacitor electrode and a second capacitor electrode overlapping the first capacitor electrode, the first capacitor electrode comprising at least a portion of the first gate electrode of the second thin film transistor,   wherein a portion of the insulating layer is between the first capacitor electrode and the second capacitor electrode, and   wherein the first active layer is coupled to an active layer of the third thin film transistor.    
     
     
       11. The organic light emitting diode display of claim 10, further comprising a fourth thin film transistor electrically coupled to the first driving voltage line and the second thin film transistor.  
     
     
       12. The organic light emitting diode display of claim 11, wherein the first active layer of the second thin film transistor is coupled an active layer of the fourth thin film transistor.  
     
     
       13. The organic light emitting diode display of claim 10, further comprising:
 a second data line crossing the first scanning line;   a second driving voltage line;   a fifth thin film transistor electrically coupled to the first scanning line and the second data line;   a sixth thin film transistor electrically coupled to the second driving voltage line and the fifth thin film transistor, the sixth thin film transistor comprising a second gate electrode and a second active layer that is curved under the second gate electrode;   a second organic light emitting diode electrically coupled to the sixth thin film transistor;   a seventh thin film transistor electrically coupled to the second organic light emitting diode and the sixth thin film transistor; and   a second storage capacitor electrically coupled to the sixth thin film transistor, the second storage capacitor comprising a third storage capacitor electrode and a fourth storage capacitor electrode overlapping the third storage capacitor electrode, the third storage capacitor electrode comprising at least a portion of the second gate electrode of the sixth thin film transistor,   wherein a portion of the insulating layer is between the third storage capacitor electrode and the fourth storage capacitor electrode,   wherein the second active layer is coupled to an active layer the seventh thin film transistor, and   wherein the first storage capacitor and the second storage capacitor are symmetrical to each other.    
     
     
       14. The organic light emitting diode display of claim 13, further comprising an eighth thin film transistor electrically coupled to the second driving voltage line and the sixth thin film transistor.  
     
     
       15. The organic light emitting diode display of claim 14, wherein the second active layer is coupled to an active layer of the eighth thin film transistor.  
     
     
       16. The organic light emitting diode display of claim 13, wherein the second capacitor electrode and the fourth storage capacitor electrode are at a same layer.  
     
     
       17. The organic light emitting diode display of claim 16, wherein the second capacitor electrode and the fourth storage capacitor electrode are electrically coupled to one of the first and second driving voltage lines.  
     
     
       18. An organic light emitting diode display comprising:
 a substrate;   a first scanning line on the substrate;   a first data line crossing the first scanning line;   a first driving voltage line crossing the first scanning line;   a first thin film transistor electrically coupled to the first scanning line and the first data line;   a second thin film transistor electrically coupled to the first driving voltage line and the first thin film transistor, the second thin film transistor comprising a first gate electrode and a first active layer;   a first organic light emitting diode electrically coupled to the second thin film transistor:   a third thin film transistor electrically coupled to the first organic light emitting diode and the second thin film transistor;   an insulating layer covering the second thin film transistor; and   a first storage capacitor electrically coupled to the first gate electrode of the second thin film transistor, the first storage capacitor comprising a first capacitor electrode and a second capacitor electrode overlapping the first capacitor electrode, the first capacitor electrode comprising at least a portion of the first gate electrode of the second thin film transistor,   wherein a portion of the insulating layer is between the first capacitor electrode and the second capacitor electrode,   wherein the insulating layer has a first contact hole exposing the first capacitor electrode, and   wherein the first active layer is coupled to an active layer of the third thin film transistor.    
     
     
       19. The organic light emitting diode display of claim 18, further comprising a fourth thin film transistor electrically coupled to the first driving voltage line and the second thin film transistor.  
     
     
       20. The organic light emitting diode display of claim 19, wherein the first active layer is coupled to an active layer of the fourth thin film transistor.  
     
     
       21. The organic light emitting diode display of claim 20, wherein the first active layer is curved under the first gate electrode of the second thin film transistor.  
     
     
       22. The organic light emitting diode display of claim 18, wherein the second capacitor electrode has an opening portion overlapping the first contact hole.  
     
     
       23. The organic light emitting diode display of claim 22, further comprising
 a fourth thin film transistor electrically coupled to the second thin film transistor; and   a contact node connecting the fourth thin film transistor and the first gate electrode, an end of the contact node contacting the first gate electrode via the opening portion and the first contact hole.    
     
     
       24. The organic light emitting diode display of claim 18, further comprising a neighboring capacitor comprising a third capacitor electrode and a fourth capacitor electrode overlapping the third capacitor electrode, the fourth capacitor electrode and the second capacitor electrode being electrically coupled to each other.  
     
     
       25. The organic light emitting diode display of claim 24, wherein the second capacitor electrode has an opening portion overlapping the first contact hole.  
     
     
       26. The organic light emitting diode display of claim 18, further comprising:
 a second data line crossing the first scanning line;   a second driving voltage line crossing the first scanning line;   a fifth thin film transistor electrically coupled to the first scanning line and a second data line;   a sixth thin film transistor electrically coupled to the second driving voltage line and the fifth thin film transistor, the sixth thin film transistor comprising a second gate electrode and a second active layer;   a second organic light emitting diode electrically coupled to the sixth thin film transistor;   a seventh thin film transistor electrically coupled to the second organic light emitting diode and the sixth thin film transistor; and   a second storage capacitor electrically coupled to the second gate electrode of the sixth thin film transistor, the second storage capacitor comprising a third capacitor electrode and a fourth capacitor electrode overlapping the third capacitor electrode, the third capacitor electrode comprising at least a portion of the second gate electrode of the sixth thin film transistor,   wherein a portion of the insulating layer is between the third capacitor electrode and the fourth capacitor electrode,   wherein the insulating layer has a second contact hole exposing the third capacitor electrode,   wherein the second active layer is coupled to the second active layer of the sixth thin film transistor, and   wherein the first active layer and the second active layer are symmetrical to each other.    
     
     
       27. The organic light emitting diode display of claim 26, further comprising an eighth thin film transistor electrically coupled to the second driving voltage line and the sixth thin film transistor.  
     
     
       28. The organic light emitting diode display of claim 27, wherein the second active layer is coupled to an active layer of the eighth thin film transistor.  
     
     
       29. The organic light emitting diode display of claim 26, wherein the second capacitor electrode and the fourth capacitor electrode are at a same layer.  
     
     
       30. The organic light emitting diode display of claim 29, wherein the second capacitor electrode and the fourth capacitor electrode are electrically coupled to the first and second driving voltage lines.  
     
     
       31. An organic light emitting diode display comprising:
 a first scanning line;   a first data line and a second data line crossing the first scanning line;   a first driving voltage line and a second driving voltage line crossing the first scanning line; and   a first pixel circuit and a second pixel circuit neighboring each other,   wherein the first pixel circuit comprises:
 a first thin film transistor electrically coupled to the first scanning line and the first data line; 
 a first capacitor comprising a first capacitor electrode and a second capacitor electrode, the first capacitor electrode being connected to the first driving voltage line; 
 a second thin film transistor electrically coupled to the first driving voltage line and comprising an active layer that includes a curved portion which is under and overlapping the first capacitor; and 
 a first organic light emitting diode electrically coupled to the second thin film transistor, 
   wherein the second pixel circuit comprises:
 a third thin film transistor electrically coupled to the first scanning line and the second data line; 
 a second capacitor comprising a third capacitor electrode and a fourth capacitor electrode, the third capacitor electrode being connected to the second driving voltage line; 
 a fourth thin film transistor electrically coupled to the second driving voltage line and comprising an active layer that includes a curved portion which is under and overlapping the second capacitor; and 
 a second organic light emitting diode electrically coupled to the fourth thin film transistor.  
   
     
     
       32. The organic light emitting diode display of claim 31, wherein the first capacitor and the second capacitor are symmetrical to each other.  
     
     
       33. The organic light emitting diode display of claim 31, wherein the first pixel circuit further comprises a fifth thin film transistor and a first contact node connecting the second capacitor electrode and the fifth thin film transistor, and
 wherein the second pixel circuit further comprises a sixth thin film transistor and a second contact node connecting the fourth capacitor electrode and the sixth thin film transistor.    
     
     
       34. The organic light emitting diode display of claim 31, wherein the first pixel circuit comprises a first active layer, the active layer of the second thin film transistor being part of the first active layer,
 wherein the first and second thin film transistors are formed along the first active layer,   wherein the second pixel circuit comprises a second active layer, the active layer of the fourth thin film transistor being part of the second active layer, and   wherein the third and fourth thin film transistors are formed along the second active layer.