Display device and manufacturing method thereof

Abstract

An organic light emitting display device having high transmittance with respect to external light and a method of manufacturing the same. The organic light emitting display device includes a substrate; a plurality of pixels formed on the substrate, each of the pixels including a first region that emits light and a second region that transmits external light; a plurality of thin film transistors disposed in the first region of each pixel; a plurality of first electrodes disposed in the first region of each pixel and electrically connected to the thin film transistors, respectively; a second electrode formed opposite to the plurality of first electrodes and comprising a plurality of transmission windows corresponding to the second regions; and an organic layer formed between the first electrodes and the second electrode. The transmission windows can be formed in the second electrode, that is, a cathode.

What is claimed is: 
     
       1. A method of manufacturing an organic light emitting display device, the method comprising:
 defining a plurality of pixels on a substrate, each of the pixels comprising a first region that emits light and a second region that transmits external light; 
 forming a plurality of thin film transistors in the first region of each pixel; 
 forming a plurality of first electrodes electrically connected to the plurality of thin film transistors, respectively, in the first region of each pixel; 
 forming an organic layer on the plurality of first electrodes; and 
 forming a second electrode on the organic layer in the first region by using a mask having a pattern of apertures corresponding to the first region, such that the formed second electrode defines a plurality of transmission windows that each correspond to the second region, and such that the formed second electrode is absent from the second region. 
 
     
     
       2. The method of  claim 1 , wherein the apertures are separated from each other at regular intervals. 
     
     
       3. The method of  claim 2 , wherein the apertures are separated from each other at intervals smaller than or equal to a distance corresponding to at least one pixel. 
     
     
       4. A method of manufacturing an organic light emitting display device, the method comprising:
 forming a plurality of pixels on a substrate, the plurality of pixels comprising a first pixel and a second pixel arranged in a first direction, each of the first pixel and the second pixel comprising a first electrode on the substrate and an emission layer on the first electrode; and   forming a second electrode on the emission layer,   wherein a first portion of the second electrode overlaps the first electrode of the first pixel in a plan-view, a second portion of the second electrode overlaps the first electrode of the second pixel in the plan-view, the first portion and the second portion are continuously extending from the first portion to the second portion between the first electrode of the first pixel and the first electrode of the second pixel, and the second electrode comprises an opening between the first electrode of the first pixel and the first electrode of the second pixel.    
     
     
       5. The method of claim 4, wherein a width of the opening in a second direction perpendicular to the first direction is greater than a width of the first electrode of the first pixel.  
     
     
       6. The method of claim 4, further comprising:
 forming a first insulating layer including a plurality of first openings exposing a portion of each of the first electrode of the first and second pixels and a second opening overlapping the opening of the second electrode.    
     
     
       7. The method of claim 6, wherein the first insulating layer further includes an upper surface and an inclined surface adjacent to the second opening, wherein an edge portion of the opening of the second electrode overlaps the inclined surface of the first insulating layer in the plan-view.  
     
     
       8. The method of claim 7, further comprising:
 forming a passivation layer between the substrate and the first insulation layer, the passivation layer comprising an opening overlapping the opening of the second electrode.    
     
     
       9. The method of claim 8, wherein the first pixel further comprises at least one transistor connected to the first electrode of the first pixel, and the passivation layer is between the transistor and the first electrode.  
     
     
       10. The method of claim 9, further comprising:
 forming a buffer layer between the substrate and transistor, the buffer layer comprising an opening overlapping the opening of the second electrode.    
     
     
       11. The method of claim 10, wherein the at least one transistor comprises a semiconductor layer on the buffer layer, a gate electrode on the semiconductor layer, and a drain electrode on the gate electrode.  
     
     
       12. The method of claim 11, further comprising:
 forming a gate insulating layer between the semiconductor layer and the gate electrode, the gate insulating layer comprising an opening overlapping the opening of the second electrode.    
     
     
       13. The method of claim 12, further comprising:
 forming an interlayer insulating layer between the gate electrode and the drain electrode, the fifth insulation layer comprising an opening overlapping the second electrode.    
     
     
       14. The method of claim 9, further comprising:
 forming a buffer layer on the substrate;   forming a gate insulating layer on the buffer layer; and   forming an interlayer insulating layer on the gate insulating layer; and   wherein at least one of the buffer layer, the gate insulating layer, and the interlayer insulating layer comprises an opening overlapping the opening of the second electrode.    
     
     
       15. The method of claim 5, wherein the first electrode of the first pixel is an anode, and the second electrode is a cathode.  
     
     
       16. The method of claim 5, wherein the opening of the second electrode has a rectangular shape.  
     
     
       17. The method of claim 5, wherein the plurality of pixels further comprises
 a third pixel and a fourth pixel which are adjacent to the first pixel in a second direction perpendicular to the first direction, and the opening of the second electrode extends to the third pixel.    
     
     
       18. The method of claim 17, wherein a width of the opening in the second direction is less than a total width of the first, third, and fourth pixels.