DISPLAY DEVICE

摘要

To alleviate an afterimage phenomenon caused by a hysteresis characteristic of a drive TFT, current driven type light emitting elements are provided for each of the pixels arranged in a matrix, and current through the light emitting elements is controlled using drive TFTs that operate by receiving a data voltage on a gate. At least two power supply voltages 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, the other being set to a voltage beyond a variation range of data voltage and that reverse biases the drive TFT, and the two power supply voltages are switched and supplied to each pixel.

主权项

1. An active matrix organic EL display device with pixel circuits arranged in a plurality of groups of rows, with four rows in each group, each group of four rows 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; four horizontal power lines, each horizontal power line associated with one row within the group of four rows and connected to a power terminal of each of the plurality of pixel circuits in the associated row; a switch having a first common terminal connected to an end of the four horizontal power lines, 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 four horizontal power lines to either the first power supply or the second power supply; wherein, during a first time period, the switch is controlled to apply the first power supply to the end of the four horizontal power lines and the plurality of pixel circuits emit light, and, during a second time period, the switch is controlled to apply the second power supply to the end of the four horizontal power lines 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.