Organic light emitting diode display
An organic light emitting diode display includes a substrate, a scan line and a previous scan line formed on the substrate, a data line and a driving voltage line crossing the scan line and the previous scan line, a switching transistor coupled to the scan line and the data line, a driving transistor coupled to the switching transistor, a compensation transistor coupled to one end of the driving transistor and configured to compensate a threshold voltage of the driving transistor, a connecting member configured to couple a compensation semiconductor layer of the compensation transistor to a driving gate electrode of the driving transistor, a first electrode coupled to another end of the driving transistor, an organic emission layer on the first electrode, and a second electrode on the organic emission layer. The connecting member and the first electrode are spaced from each other on a planar surface of the substrate.
1. An organic light emitting diode display, comprising:
a substrate;
a scan line and a previous scan line on the substrate and configured to transmit a scan signal and a previous scan signal, respectively;
a data line and a driving voltage line crossing the scan line and the previous scan line, and configured to transmit a data signal and a driving voltage, respectively;
a switching transistor coupled to the scan line and the data line;
a driving transistor coupled to the switching transistor;
a compensation transistor coupled to one end of the driving transistor and configured to turn on according to the scan signal to compensate a threshold voltage of the driving transistor;
a connecting member configured to couple a compensation semiconductor layer of the compensation transistor to a driving gate electrode of the driving transistor;
a first electrode coupled to another end of the driving transistor;
an organic emission layer on the first electrode; and
a second electrode on the organic emission layer,
wherein the connecting member and the first electrode are spaced from each other on a planar surface of the substrate.
2. The organic light emitting diode display of claim 1 , wherein
an outer line of the connecting member and an outer line of the first electrode facing the outer line of the connecting member in the planar surface have an interval therebetween.
3. The organic light emitting diode display of claim 1 , further comprising:
a switching semiconductor layer and a driving semiconductor layer at a same layer as that of the compensation semiconductor layer; and
a first gate insulating layer, a second gate insulating layer, and an interlayer insulating layer sequentially covering the switching semiconductor layer, the driving semiconductor layer, and the compensation semiconductor layer,
wherein the connecting member is on the interlayer insulating layer.
4. The organic light emitting diode display of claim 3 , further comprising
a storage capacitor comprising:
a first storage capacitive plate on the first gate insulating layer and overlapping the driving semiconductor layer; and
a second storage capacitive plate on the second gate insulating layer and overlapping the first storage capacitive plate,
wherein the first storage capacitive plate comprises the driving gate electrode.
5. The organic light emitting diode display of claim 4 , wherein the data line and the driving voltage line are at a same layer as the connecting member.
6. The organic light emitting diode display of claim 5 , wherein:
one end of the connecting member is coupled to the driving gate electrode through a contact hole in the second gate insulating layer and the interlayer insulating layer, and
another end of the connecting member is coupled to the compensation semiconductor layer through a contact hole in the first gate insulating layer, the second gate insulating layer, and the interlayer insulating layer.
7. The organic light emitting diode display of claim 6 , further comprising:
a passivation layer configured to cover the data line, the driving voltage line, and the connecting member;
a pixel defining layer configured to cover an edge of the first electrode on the passivation layer; and
an initialization voltage line at a same layer as that of the first electrode, and configured to initialize the driving transistor,
wherein the second storage capacitive plate is located between the driving gate electrode and the first electrode, the second storage capacitive plate covering the driving gate electrode.
8. The organic light emitting diode display of claim 7 , further comprising:
an initialization transistor configured to turn on according to the previous scan signal, and configured to transmit an initialization voltage to the driving gate electrode;
a light emission control line at a same layer as that of the scan line and configured to transmit a light emission control signal;
an operation control transistor configured to turn on by the light emission control signal and configured to transmit the driving voltage to the driving transistor; and
a light emission control transistor configured to turn on by the light emission control signal and configured to transmit the driving voltage from the driving transistor to the first electrode,
wherein a light emission control drain electrode of the light emission control transistor overlaps an extended portion of the first electrode.