| 摘要 |
To alleviate an afterimage phenomenon caused by a hysteresis characteristic of a drive transistor. Current driven type light emitting elements 3 are provided for each of pixels 6 that are arranged in a matrix shape, and current of the light emitting elements 3 is controlled using drive TFTs 2 that operate by receiving data voltage on a gate. At least two power supply voltages (PVDDa, PVDDb) for supply to each pixel are provided, one being set to a voltage such that current corresponding to a data voltage flows in the drive TFT 2, the other being set to a voltage beyond a variation range of data voltage and that reverse biases the drive TFT 2, and the two power supply voltages are switched and supplied to each pixel 6. |
| 主权项 |
1. An active matrix organic EL display device with pixel circuits arranged in a plurality of rows, each row comprising:
a plurality of pixel circuits, each pixel circuit comprising a selection TFT, a drive TFT, a storage capacitor, and an organic EL light emitting element; a horizontal power line connected to a power terminal of each of the plurality of pixel circuits; a first switch having a first common terminal connected to a first end of the horizontal power line, a first terminal connected to a first power supply, and a second terminal connected to a second power supply, wherein the first switch controllably connects the first end of the horizontal power line to either the first power supply, the second power supply, or to an open circuit; a second switch, having a second common terminal connected to a second end of the horizontal power line, a third terminal connected to the first power supply, and a fourth terminal connected to a third power supply, wherein the second switch controllably connects the second end of the horizontal power line to either the first power supply, the third power supply, or to an open circuit; and wherein, during a first time period, the first switch and the second switch are controlled to apply the first power supply to the first and second ends of the horizontal power line and the plurality of pixel circuits emit light, and, during a second time period, the first switch is controlled to apply the second power supply to the first end of the horizontal power line and the second switch is controlled to apply an open circuit to the second end of the horizontal power line and wherein the second power supply is set to a voltage such that the drive TFT in each of the plurality of pixel circuits is reverse biased. |
