Pixel driver circuit and pixel circuit having the pixel driver circuit

Abstract

A pixel driver circuit for driving a light-emitting element and a pixel circuit having the pixel driver circuit are provided. The pixel driver circuit includes a data line, address lines, switch thin film transistors, feedback thin film transistors and drive thin film transistors. The pixel circuit may include an organic light emitting diode, which is driven by the pixel driver circuit.

1 - 35 . (canceled) 
     
     
         36 . A pixel driver circuit comprising:
 an address line;   a data line;   a switch thin film transistor, a first node of the switch transistor being connected to the data line and a gate of the switch transistor being connected to the address line;   a feedback thin film transistor, a gate of the feedback transistor being connected to the address line and a second node of the feedback transistor being connected to a potential;   a reference thin film transistor, a first node of the reference transistor being connected to a second node of the switch transistor, a gate of the reference transistor being connected to the second node of the switch transistor, and a second node of the reference transistor being connected to a first node of the feedback transistor; and   a drive thin film transistor, a gate of the drive transistor being connected to the gate of the reference transistor.   
     
     
         37 . The pixel driver circuit according to  claim 36 , wherein at least one of the thin film transistors is an amorphous silicon based thin film transistor. 
     
     
         38 . The pixel driver circuit according to  claim 36 , wherein at least one of the thin film transistor is a polycrystalline silicon based thin film transistor. 
     
     
         39 . The pixel driver circuit according to  claim 36 , wherein at least one of the thin film transistors is a n-type thin film transistor. 
     
     
         40 . The pixel driver circuit according to  claim 36 , wherein at least one of the thin film transistors is a p-type thin film transistor. 
     
     
         41 . The pixel driver circuit according to  claim 36 , wherein the thin film transistors each comprise a second gate. 
     
     
         42 . The pixel driver circuit according to  claim 36 , wherein the first node of the reference transistor is a drain node, and wherein the second node of the reference transistor is a source node. 
     
     
         43 . The pixel driver circuit according to  claim 36 , wherein the second node of the feedback transistor is connected to a ground potential. 
     
     
         44 . The pixel driver circuit according to  claim 36 , wherein the second node of the feedback transistor is connected to a voltage supply. 
     
     
         45 . The pixel driver circuit according to  claim 36 , comprising a capacitor connected to the gate of the drive transistor and a ground potential. 
     
     
         46 . The pixel driver circuit according to  claim 36 , comprising a capacitor connected to the gate of the drive transistor and a voltage supply. 
     
     
         47 . A pixel circuit comprising:
 a pixel driver circuit according to  claim 36 ; and   an organic light emitting diode, the one of a first node and a second node of the drive transistor being connected to the organic light emitting diode.   
     
     
         48 . The pixel circuit according to  claim 47 , wherein the one of the first node and the second node of the drive transistor is connected to the organic light emitting diode, and wherein the other node is connected to a ground potential. 
     
     
         49 . The pixel circuit according to  claim 47 , wherein the one of the first node and the second node of the drive transistor is connected to the organic light emitting diode, and wherein the other node is connected to a voltage supply. 
     
     
         50 . The pixel circuit according to  claim 47 , wherein the one of the first node and the second node of the drive transistor is a drain, and wherein the other is a source. 
     
     
         51 . The pixel circuit according to  claim 47 , comprising a capacitor connected between the gate of the drive transistor and a ground potential. 
     
     
         52 . The pixel circuit according to  claim 47 , comprising a capacitor connected between the gate of the drive transistor and a voltage supply. 
     
     
         53 . The pixel circuit according to  claim 47 , wherein the pixel circuit is arranged for a monochrome display. 
     
     
         54 . The pixel circuit according to  claim 47 , wherein the pixel circuit is arranged for a full color display.