Organic light emitting display device

An organic light emitting display device, comprising:

• a display unit in which a first pixel comprising a driving transistor, a first control transistor, a second control transistor, a sensing transistor, and an organic light emitting element is located;
• and
• a power supply unit connected with a first driving voltage line connected to one electrode of the first control transistor, and a second driving voltage connected to another electrode of the second control transistor,
• wherein the driving transistor has one electrode connected with a node, and another electrode connected with the organic light emitting element,
• wherein another electrode of the first control transistor and another electrode of the second control transistor are connected with the node, and
• wherein the sensing transistor and the second control transistor are configured to be turned on, and the first control transistor is configured to be turned off, in a sensing period.

An organic light emitting display device, comprising:

• a scan transistor having one electrode connected with a data line, another electrode connected with a node, and a gate electrode connected with a scan line;
• a driving transistor having one electrode connected with the node and another electrode connected with an organic light emitting element;
• a first control transistor receiving a first driving voltage through one electrode, and having another electrode connected with the node;
• a second control transistor receiving a second driving voltage through one electrode, and having another electrode connected with the node;
• and
• a sensing transistor having one electrode connected with the data line, and another electrode connected with the organic light emitting element,
• wherein the sensing transistor is configured to perform a switching operation complementarily with the first control transistor in a sensing period, and is configured to perform the switching operation in the same manner as the second control transistor.