Electro-luminescence display device

摘要

There is provided an electric device which can prevent a deterioration in a frequency characteristic due to a large electric power external switch connected to an opposite electrode and can prevent a decrease in the number of gradations. The electric device includes a plurality of source signal lines, a plurality of gate signal lines, a plurality of power source supply lines, a plurality of power source control lines, and a plurality of pixels. Each of the plurality of pixels includes a switching TFT, an EL driving TFT, a power source controlling TFT, and an EL element, and the power source controlling TFT controls a potential difference between a cathode and an anode of the EL element.

主权项

1. A light emitting device comprising:
a first thin film transistor; a second thin film transistor; a third thin film transistor; a capacitor including a first electrode and a second electrode; and an electro-luminescence element including a third electrode and a fourth electrode, wherein one of a source and a drain of the first thin film transistor is directly connected to a gate of the second thin film transistor, wherein the second thin film transistor is directly connected between one of a source and a drain of the third thin film transistor and the third electrode of the electro-luminescence element, wherein the first electrode of the capacitor is directly connected to the one of the source and the drain of the first thin film transistor and the gate of the second thin film transistor, and wherein the second electrode of the capacitor is not directly connected to the fourth electrode of the electro-luminescence element.