Pixel, display device having the same, and thin film transistor (tft) substrate for display device

A display device comprising:

• a display panel including a pixel;
• a scan driver configured to provide a scan signal to the display panel;
• a data driver configured to provide a data voltage to the display panel;
• and
• a timing controller configured to control the scan driver and the data driver,
• wherein the pixel includes:
• an emitter configured to emit light based at least in part on a driving current;
• a driving transistor including an active layer, a first electrode electrically connected to a first end portion of the active layer, a second electrode electrically connected to a second end portion of the active layer, a first gate electrode configured to receive a data voltage from a data driver so as to form a channel in the active layer, and a second gate electrode configured to receive a bias voltage from a voltage source, wherein the channel is configured to adjust the driving current;
• a data voltage holding circuit configured to maintain a voltage of the first gate electrode while the emitter emits the light;
• and
• a data voltage providing circuit configured to transmit the data voltage to the first gate electrode based at least in part on a scan signal.

A thin film transistor (TFT) substrate for a display device, the TFT substrate comprising:

• a substrate;
• a bottom gate pattern formed over the substrate;
• a first gate insulation layer formed over the substrate and covering the bottom gate pattern;
• an active pattern formed over the first gate insulation layer and including a first region and a second region;
• a second gate insulation layer formed over the first gate insulation layer and covering the active pattern;
• and
• a first top gate pattern formed over the second gate insulation layer so as to form a driving transistor having a double gate structure including the first region, the second region, and the first gate insulation layer,
• wherein the driving transistor is configured to generate a driving current.