| 主权项 |
1. An organic light emitting display comprising:
an organic light emitting diode; a driving thin film transistor (TFT) comprising a first electrode connected to a first node, a second electrode connected to an input terminal of high-potential cell driving voltage, and a third electrode connected to the organic light emitting diode through a second node, and the driving TFT configured to control current through the organic light emitting diode; a first switching TFT comprising a first electrode connected to a gate driver to receive a light emission control signal, a second electrode connected to a third node, and a third electrode connected to the first node and the first electrode of the driving TFT, the first switching TFT configured to provide a current path between the third node and the first node in response to the light emission control signal at a first light emission level; a second switching TFT comprising a first electrode connected to the gate driver to receive an initialization signal, a second electrode connected to the second node and the third electrode of the driving TFT, and a third electrode connected an initialization voltage, the second switching TFT configured to initialize the second node to the initialization voltage by connecting the second node to the third electrode of the second switching TFT in response to the first electrode of the second switching TFT receiving the initialization signal at a first initialization level from the gate driver; a third switching TFT comprising a first electrode connected to the gate driver to receive the initialization signal, a second electrode connected to the first node, the first electrode of the driving TFT, and the third electrode of the first switching TFT, and a third electrode connected to a reference voltage, the third switching TFT configured to initialize either the first node or the third node to the reference voltage that is higher than the initialization voltage in response to the first electrode of the third switching TFT receiving the initialization signal at the first initialization level from the gate driver; a fourth switching TFT comprising a first electrode connected to the gate driver to receive a scan signal, a second electrode connected to a data line, and a third electrode connected to the third node and the second electrode of the first switching TFT, the fourth switching TFT configured to provide a current path between the data line and the third node in response to the first electrode of the fourth switching TFT receiving the scan signal from the gate driver when the fourth switching TFT is turned on; a compensation capacitor including a first end and a second end, wherein the first end connected to the first node, the first electrode of the driving TFT, the third electrode of the first switching TFT, and the second electrode of the third switching TFT, and wherein the second end is connected to the second node, the second electrode of the second switching TFT, the third electrode of the driving TFT, and the organic light emitting diode, the compensation capacitor configured to store a threshold voltage of the driving TFT in response to the first switching TFT being turned off after the first electrode of the first switching TFT receives the light emission control signal at a second light emission level from the gate driver, the second switching TFT being turned off after the first electrode of the second switching TFT receives the initialization signal at a second initialization level from the gate driver, and the third switching TFT being turned off after the first electrode of the third switching TFT receives the initialization signal at the second initialization level from the gate driver, and the compensation capacitor being distinct from parasitic capacitance of the driving TFT; and a storage capacitor including a first end and a second end, the first end of the storage capacitor connected to the third node, the third electrode of fourth switching TFT, and the second electrode of the first switching TFT, and the second end of the storage capacitor connected to the second node, the second electrode of the second switching TFT, and the organic light emitting diode. |
