Electric optical apparatus, driving method thereof and electronic device
View Patent ↗An electric optical apparatus including a display section in which an electric optical material is pinched between a pair of substrates and a plurality of pixels is arranged, wherein the display section is provided with a scanning line, a data line and a power-supply line that are connected to each of the pixels, and each of the pixels is provided with a pixel electrode, a driving transistor that is connected between the pixel electrode and the power-supply line, a capacitance for modulation that is connected between a gate of the driving transistor and the data line, a maintenance capacitance that connects one side electrode to the gate of the driving transistor, and a transistor for correction that is connected to a diode and in which one side terminal thereof is connected to the gate of the driving transistor.
1. An electric optical apparatus comprising a display section in which an electric optical material is provided between a pair of substrates and a plurality of pixels is arranged, and a control section,
wherein the display section is provided with a first scanning line, a data line and a power-supply line that are connected to each of the plurality of pixels,
each of the plurality of pixels is provided with a pixel electrode, a driving transistor that is directly connected between the pixel electrode and the power-supply line, a modulation capacitor that is connected between a gate of the driving transistor and the data line, a control transistor that is connected between the modulation capacitor and the data line, a maintenance capacitor in which one end is directly connected to the gate of the driving transistor, and a correction transistor having a gate and one terminal that are directly connected to the gate of the driving transistor, and
when an image is displayed on the display section, the control section charges the maintenance capacitor, performs a threshold value voltage correction operation in which a portion of charges of the maintenance capacitor that is precharged is drawn out through the correction transistor so that a gate potential of the driving transistor is a threshold value voltage, inputs an image signal to the modulation capacitor through the control transistor, changes a potential of the power-supply line, and supplies current to the pixel electrode through the driving transistor.
2. The electric optical apparatus according to claim 1 , further comprising a potential control line that is connected to the other terminal of the correction transistor.
3. The electric optical apparatus according to claim 1 , further comprising a potential control line that is connected to the other end of the maintenance capacitor.
4. The electric optical apparatus according to claim 1 , further comprising a precharge switching element in which an output terminal is connected to the gate of the driving transistor and the modulation capacitor.
5. The electric optical apparatus according to claim 4 , further comprising a second scanning line different from the first scanning line to which each of the plurality of pixels is belonged is connected to an input terminal of the switching element for precharge.
6. The electric optical apparatus according to claim 4 , further comprising a precharge power-supply line that is connected to the input terminal of the precharge switching element.
7. An electronic device comprising the electric optical apparatus according to claim 1 .
8. A driving method of an electric optical apparatus comprising a display section in which an electric optical material is provided between a pair of substrates and a plurality of pixels is arranged, wherein the display section is provided with a scanning line, a data line and a power-supply line that are connected to each of the plurality of pixels, each of the plurality of pixels is provided with a pixel electrode, a driving transistor that is connected between the pixel electrode and the power-supply line, a modulation capacitor that is connected between a gate of the driving transistor and the data line, a maintenance capacitor in which one end is connected to the gate of the driving transistor, and a correction transistor having a gate and one terminal that are connected to the gate of the driving transistor,
wherein displaying an image on the display section comprises:
precharging in which the maintenance capacitor is charged;
correcting a threshold value voltage in which a portion of a precharged potential that is precharged is drawn out through the correction transistor so that a gate potential of the driving transistor is the threshold value voltage;
programming in which an image signal is input to the modulation capacitor through the data line; and
display driving in which a potential of the power-supply line is changed and a current is supplied to the pixel electrode through the driving transistor,
wherein the electric optical apparatus further comprises a control transistor that is connected between the modulation capacitor and the data line,
the image signal is input to the modulation capacitor through the control transistor in the programming, and
a potential of the scanning line is input to the maintenance capacitor in the precharging.
9. The driving method of the electric optical apparatus according to claim 8 , in the display driving, a ramp waveform is input to the power-supply line.