Organic light-emitting diode display

Abstract

An organic light-emitting diode display is disclosed. In one aspect, a semiconductor layer is on a substrate, and the semiconductor layer is non-linear. A gate metal line is on the semiconductor layer, and an insulating layer covering the semiconductor layer and the gate metal line and having a plurality of contact holes connected to the semiconductor layer. A data metal line is on the insulating layer and electrically connected to the semiconductor layer via a selected one of the contact holes. An OLED is electrically connected to the gate metal line and the data metal line, and the semiconductor layer includes a narrow semiconductor layer having a first width and an expansion semiconductor layer formed adjacent to the selected contact hole and having a second width greater than the first width.

What is claimed is: 
     
         1 . An organic light-emitting diode (OLED) display, comprising:
 a substrate;   a semiconductor layer on the substrate, wherein the semiconductor layer is non-linear;   a gate metal line on the semiconductor layer;   an insulating layer covering the semiconductor layer and the gate metal line and having a plurality of contact holes connected to the semiconductor layer;   a data metal line on the insulating layer and electrically connected to the semiconductor layer via a selected one of the contact holes; and   an OLED electrically connected to the gate metal line and the data metal line,   wherein the semiconductor layer includes a narrow semiconductor part having a first width and an expansion semiconductor part formed adjacent to the selected contact hole and having a second width greater than the first width.   
     
     
         2 . The OLED display of  claim 1 , wherein the expansion semiconductor part encloses the selected contact hole. 
     
     
         3 . The OLED display of  claim 1 , wherein the expansion semiconductor part includes a contact semiconductor region overlapping the selected contact hole and a non-contact semiconductor region not overlapping the selected contact hole, in the depth dimension of the OLED display, and wherein edges of the expansion semiconductor part are separated from edges of the selected contact hole in the non-contact semiconductor region. 
     
     
         4 . The OLED display of  claim 3 , further comprising:
 a scan line on the substrate and configured to transmit a scan signal;   a data line and a driving voltage line crossing the scan line and configured to respectively transmit a data voltage and a driving voltage;   a switching transistor electrically connected to the scan line and the data line;   a driving transistor electrically connected to the switching transistor and including a portion of the semiconductor layer as a driving channel, a driving gate electrode overlapping the driving channel in the depth dimension of the OLED display, and driving source and drain electrodes located at the ends of the driving channel;   a compensation transistor including another portion of the semiconductor layer as a compensation channel, a compensation gate electrode overlapping the compensation channel in the depth dimension of the OLED display, and compensation source and drain electrodes located at opposing ends of the compensation channel, wherein the compensation source electrode is electrically connected to the driving drain electrode; and   a driving connector configured to electrically connect the compensation drain electrode to the driving gate electrode,   wherein the gate metal line includes the scan line, and wherein the data metal line includes the driving connector.   
     
     
         5 . The OLED display of  claim 4 , further comprising:
 a previous scan line substantially parallel to the scan line and configured to transmit a previous scan signal;   an initialization voltage line configured to transmit an initialization voltage configured to initialize the driving transistor; and   an initialization transistor configured to be turned on based on the previous scan signal and including an initialization channel and initialization gate, source, and drain electrodes,   wherein the expansion semiconductor part includes a first expansion semiconductor part configured to electrically connect the compensation drain electrode to the initialization drain electrode.   
     
     
         6 . The OLED display of  claim 5 , wherein the selected contact hole includes a compensation contact hole located where the driving connector and the first expansion semiconductor part overlap each other in the depth dimension of the OLED display. 
     
     
         7 . The OLED display of  claim 6 , wherein the first expansion semiconductor part includes a first contact semiconductor region overlapping the compensation contact hole and a first non-contact semiconductor region not overlapping the compensation contact hole, in the depth dimension of the OLED display, and wherein edges of the first expansion semiconductor part and edges of the compensation contact hole are separated from each other in the first non-contact semiconductor region. 
     
     
         8 . The OLED display of  claim 7 , wherein the first non-contact semiconductor region is positioned on the shortest path passing in front of the compensation contact hole, and wherein the shortest path extends from a vertical portion of the narrow semiconductor part to a horizontal portion of the narrow semiconductor part. 
     
     
         9 . The OLED display of  claim 7 , wherein the first non-contact semiconductor region is located on a detour path around the compensation contact hole. 
     
     
         10 . The OLED display of  claim 6 , wherein the data metal line further includes the data line, and wherein the expansion semiconductor part further includes a second expansion semiconductor part overlapping the data line. 
     
     
         11 . The OLED display of  claim 10 , wherein the contact hole further includes a switching contact hole formed located where the data line and the second expansion semiconductor part overlap each other in the depth dimension of the OLED display. 
     
     
         12 . The OLED display of  claim 10 , wherein the insulating layer includes:
 a first gate insulating layer covering the semiconductor layer;   a second gate insulating layer covering the scan line; and   an interlayer insulating layer covering the second gate insulating layer, and   wherein the compensation contact hole and the switching contact hole penetrate the first and second gate insulating layers and the interlayer insulating layer.   
     
     
         13 . The OLED display of  claim 4 , wherein the OLED includes:
 a pixel electrode electrically connected to the driving transistor;   an organic emission layer on the pixel electrode; and   a common electrode on the organic emission layer.   
     
     
         14 . An organic light-emitting diode (OLED) display comprising:
 a substrate;   a semiconductor layer on the substrate, wherein the semiconductor layer is non-linear;   a gate metal line on the semiconductor layer;   an insulating layer covering the semiconductor layer and the gate metal line and having a plurality of contact holes connected to the semiconductor layer;   a data metal line on the insulating layer and electrically connected to the semiconductor layer via a selected one of the contact holes; and   an OLED electrically connected to the gate metal line and the data metal line,   wherein the data metal line includes a normal data metal layer having a first width and an expansion data metal layer formed adjacent to the selected contact hole and having a second width greater than the first width.   
     
     
         15 . The OLED display of  claim 14 , wherein the expansion data metal part encloses the selected contact hole. 
     
     
         16 . The OLED display of  claim 14 , wherein the semiconductor layer includes a curved semiconductor part formed adjacent to the selected contact hole and a semiconductor stripe part having a substantially linear shape, and wherein the curved semiconductor part overlaps the expansion data metal part in the depth dimension of the OLED display. 
     
     
         17 . The OLED display of  claim 16 , wherein the expansion data metal part includes a contact data region overlapping the selected contact hole and a non-contact data region not overlapping the selected contact hole, in the depth dimension of the OLED display, and wherein edges of the expansion data metal part and the edges of the selected contact hole are separated from each other in the non-contact data region. 
     
     
         18 . The OLED display of  claim 17 , further comprising:
 a scan line on the substrate and configured to transmit a scan signal;   a data line and a driving voltage line crossing the scan line and configured to respectively transmit a data voltage and a driving voltage;   a switching transistor electrically connected to the scan line and the data line;   a driving transistor electrically connected to the switching transistor and including a portion of the semiconductor layer as a driving channel, a driving gate electrode overlapping the driving channel in the depth dimension of the OLED display, and driving source and drain electrodes located at ends of the driving channel;   a compensation transistor including another portion of the semiconductor layer as a compensation channel, a compensation gate electrode overlapping the compensation channel in the depth dimension of the OLED display, and compensation source and drain electrodes located at ends of the compensation channel, wherein the compensation source electrode is electrically connected to the driving drain electrode; and   a driving connector configured to electrically connect the compensation drain electrode to the driving gate electrode,   wherein the gate metal line includes the scan line, and wherein the data metal line includes the driving connector.   
     
     
         19 . The OLED display of  claim 18 , wherein the contact hole includes a compensation contact hole located where the driving connector and the first expansion semiconductor part overlap each other in the depth dimension of the OLED display. 
     
     
         20 . The OLED display of  claim 19 , wherein the driving connector includes a driving connection portion having a first width and a driving expansion part adjacent to the compensation contact hole and having a second width greater than the first width. 
     
     
         21 . The OLED display of  claim 20 , wherein the driving expansion part includes a contact data region overlapping the compensation contact hole and a non-contact data region not overlapping the compensation contact hole, in the depth dimension of the OLED display, and wherein edges of the driving expansion layer and edges of the compensation contact hole are separated from each other in the non-contact data region. 
     
     
         22 . The OLED display of  claim 21 , wherein the insulating layer includes:
 a first gate insulating layer covering the semiconductor layer;   a second gate insulating layer covering the scan line; and   an interlayer insulating layer covering the second gate insulating layer, and   wherein the compensation contact hole penetrates the first and second gate insulating layers and the interlayer insulating layer.