Display device and driving method thereof
The present invention enhances a display quality of a display device as a task. As means for solving such a task, the present invention provides a display device including a light emitting element and a switching element in a pixel, wherein the switching element is provided for supplying a power source to the light emitting element and is constituted of a first switching element and a second switching element. The first switching element and the second switching element are configured to be operated, in response to inputting of data signals into the inside of the pixel, one switching element assumes a positive bias state and another switching element assumes a reverse bias state, and the bias states are alternately changed over between the first switching element and the second switching element in response to time-sequential inputting of the data signals, and the supply of the power source to the light emitting element is performed by way of either one of the first switching element and the second switching element.
1. A display device including a circuit for sequentially inputting at least a first scanning signal and a second scanning signal to the pixel, the first scanning signal and the second scanning signal having a relationship that when an ON signal is inputted as one scanning signal and an OFF signal is inputted as another scanning signal, the relationship is changed over during a scanning step, wherein
the circuit includes a first gate line for inputting the first scanning signal and a second gate line for inputting the second scanning signal and,
wherein the pixel includes at least:
a light emitting element, and a first switching element and a second switching element which supply a power source to the light emitting element through either one of the switching elements;
a fifth switching element which is driven by the ON signal of the first scanning signal and supplies the OFF signal of the second scanning signal to a gate electrode of the first switching element, and a sixth switching element which is driven by the ON signal of the second scanning signal and supplies the OFF current of the first scanning signal to a gate electrode of the second switching element;
a third switching element which is driven in response to the ON signal of the second scanning signal, and a fourth switching element which is driven in response to the ON signal of the first scanning signal;
wherein the third switching element and the fourth switching element are both configured to receive a same data signal on a data line which is common to the third and fourth switching elements;
a first capacitive element which stores a charge corresponding to the data signal through the third switching element and also drives the first switching element, and a second capacitive element which stores a charge corresponding to the data signal through the fourth switching element and also drives the second switching element.
2. A display device according to claim 1 , wherein the changeover of ON/OFF of the first scanning signal and the second scanning signal is performed for respective frames.
3. A display device according to claim 1 , wherein the first switching element and the second switching element have respective channel regions thereof formed in a zigzag pattern.
4. A display device according to claim 1 , wherein the first switching element and the second switching element are formed on a side below a light emitting layer and one electrode formed above the light emitting layer is formed of a light-transmitting conductive layer.
5. A display device according to claim 1 , wherein both of the first switching element and the second switching element are formed of a N-channel-type transistor.
6. A display device according to claim 1 , wherein both of the first switching element and the second switching element have a semiconductor layer thereof formed of amorphous silicon.