Organic light emitting element, display apparatus having the same and method of manufacturing the same

Abstract

An organic light emitting element is formed on the substrate. The organic light emitting element includes a first electrode, a bank, a surface energy, an organic light emitting member and a second electrode. The first electrode receives the first driving signal. The first electrode has a first surface energy. The bank surrounds sides of the first electrode. The surface energy lowering pattern is formed on the bank. The surface energy lowering pattern has a second surface energy that is lower than the first surface energy. The organic light emitting member is formed on the first electrode. The second electrode receives a second driving signal to display an image. Therefore, an image display quality of the display apparatus is improved.

1 . An organic light emitting element on a substrate, the organic light emitting element comprising: 
 a first electrode configured to receive a first driving signal, the first electrode having a first surface energy;    a bank that surrounds sides of the first electrode;    a surface energy lowering pattern on the bank, the surface energy lowering pattern having a second surface energy that is lower than the first surface energy;    an organic light emitting member on the first electrode; and    a second electrode configured to receive a second driving signal to display an image.    
   
   
       2 . The organic light emitting element of  claim 1 , wherein the surface energy lowering pattern is formed on a top surface of the bank.  
   
   
       3 . The organic light emitting element of  claim 1 , wherein the bank comprises a third surface energy that is higher than the second surface energy.  
   
   
       4 . A display apparatus comprising: 
 an organic light emitting element on a substrate, the organic light emitting element including:    a first electrode configured to receive a first driving signal, the first electrode having a first surface energy;    a bank that surrounds sides of the first electrode;    a surface energy lowering pattern on the bank, the surface energy lowering pattern having a second surface energy that is lower than the first surface energy;    an organic light emitting member on the first electrode; and    a second electrode configured to receive a second driving signal to display an image.    
   
   
       5 . The display apparatus of  claim 4 , wherein the surface energy lowering pattern is formed on a top surface of the bank.  
   
   
       6 . The display apparatus of  claim 4 , wherein the bank: comprises a third surface energy that is higher than the second surface energy.  
   
   
       7 . The display apparatus of  claim 4 , wherein the display apparatus comprises a plurality of first electrodes arranged in a matrix shape, and each of the first electrodes has indium tin oxide, tin oxide, indium zinc oxide or zinc oxide.  
   
   
       8 . The display apparatus of  claim 4 , wherein the bank surrounds the sides of the first electrode to form a hole on the first electrode.  
   
   
       9 . The display apparatus of  claim 4 , wherein a surface of the bank forms a taper angle of about 60° to about 150° with respect to a surface of the first electrode.  
   
   
       10 . The display apparatus of  claim 4 , wherein the surface energy lowering film comprises fluorine.  
   
   
       11 . The display apparatus of  claim 4 , wherein the organic light emitting member comprises a hole injection layer and a light emitting layer on the hole injection layer.  
   
   
       12 . The display apparatus of  claim 4 , wherein the second electrode comprises a metal.  
   
   
       13 . A display apparatus comprising: 
 an organic light emitting element on a substrate, the organic light emitting element including:    a first electrode configured to receive a first driving signal;    a bank that surrounds sides of the first electrode, the bank having a first surface energy;    a surface energy lowering pattern on the bank, the surface energy lowering pattern having a second surface energy that is lower than the first surface energy;    an organic light emitting member on the first electrode; and    a second electrode configured to receive a second driving signal to display an image.    
   
   
       14 . A display apparatus comprising: 
 a switching transistor on a substrate, the switching transistor having a first source/drain electrode and a first gate electrode;    a driving transistor on the substrate, the driving transistor having a second source/drain electrode and a second gate electrode electrically connected to the first source/drain electrode of the switching transistor; and    an organic light emitting element on the substrate having the switching transistor and the driving transistor, the organic light emitting element including:    a first electrode electrically connected to the second source/drain electrode of the driving transistor;    a bank on the substrate having the first electrode, the bank surrounding sides of the first electrode to form a hole on the first electrode, the bank having a first surface energy;    a surface energy lowering pattern on the bank, the surface energy lowering pattern having a second surface energy that is lower than the first surface energy;    an organic light emitting member on the first electrode; and    a second electrode on the substrate having the organic light emitting member.    
   
   
       15 . The display apparatus of  claim 14 , wherein the first electrode comprises a third surface energy that is higher than the second surface energy.  
   
   
       16 . The display apparatus of  claim 14 , wherein the surface energy lowering pattern is formed on a top surface of the bank.  
   
   
       17 - 28 . (canceled)