Pixel and organic light emitting display device including the same

A pixel comprising:

• a light emitting diode comprising an anode and a cathode;
• a first transistor comprising a first drain region electrically connected to the anode of the light emitting diode, a first gate electrode, a first channel region overlapping the first gate electrode in a plan view, and a first source region facing the first drain region with the first channel region therebetween;
• a first sub-transistor comprising a first sub-gate electrode, a first sub-channel region overlapping the first sub-gate electrode in a plan view, a first sub-drain region connected to the first gate electrode, and a first sub-source region facing the first sub-drain region with the first sub-channel region therebetween;
• a second sub-transistor comprising a second sub-gate electrode, a second sub-channel region overlapping the second sub-gate electrode in a plan view, a second sub-drain region connected to the first sub-source region, and a second sub-source region facing the second sub-drain region with the second sub-channel region therebetween;
• a shielding pattern overlapping the first sub-source region and the second sub-drain region in a plan view and not overlapping the first sub-channel region;
• and
• an upper shielding pattern on a different layer than the shielding pattern, and overlapping the first sub-source region and the second sub-drain region in a plan view,
• wherein a width of the first sub-channel region is greater than a width of the second sub-channel region.

An organic light emitting display device comprising:

• a scan driving circuit configured to sequentially provide scan signals to scan lines extending in a first direction and arranged in a second direction that is orthogonal to the first direction;
• a data driving circuit configured to provide data signals to data lines that insulatingly cross the scan lines;
• and
• pixels comprising a light emitting diode having an anode and a cathode, and a circuit part configured to control a light emission of the light emitting diode, the circuit part comprising:
• a first transistor comprising a first drain region electrically connected to the anode of the light emitting diode, a first gate electrode, a first channel region overlapping the first gate electrode in a plan view, and a first source region facing the first drain region with the first channel region therebetween;
• a first sub-transistor comprising a first sub-gate electrode, a first sub-channel region overlapping the first sub-gate electrode in a plan view, a first sub-drain region connected to the first gate electrode, and a first sub-source region facing the first sub-drain region with the first sub-channel region therebetween;
• a second sub-transistor comprising a second sub-gate electrode, a second sub-channel region overlapping the second sub-gate electrode in a plan view, a second sub-drain region connected to the first sub-source region, and a second sub-source region facing the second sub-drain region with the second sub-channel region therebetween;
• and
• a shielding pattern overlapping the first sub-source region and the second sub-drain region in a plan view and not overlapping the first sub-channel region,
• wherein a width of the first sub-channel region is greater than a width of the second sub-channel region.