Display apparatus and drive method therefor, and electronic equipment

1. A display device comprising:

a pixel array section; and

a drive section,

the pixel array section including scanning lines arranged in rows, signal lines SL arranged in columns, pixels arranged in matrix at positions where the scanning lines respectively intersect with the signal lines, and bias lines arranged in parallel to the respective scanning lines,

each of the pixels at least including a sampling transistor, a drive transistor, a light emitting element, a holding capacitance, and an auxiliary capacitance,

a control terminal of the sampling transistor being connected to the scanning line, and current terminals in pair of the sampling transistor being connected between the signal line and a control terminal of the drive transistor,

one of current terminals in pair of the drive transistor being connected to the light emitting element, and the other terminal being connected to the power supply line,

the holding capacitance being connected between the control terminal and the one current terminal of the drive transistor, and

the auxiliary capacitance being connected between the one of current terminals of the drive transistor and the bias line,

wherein the drive section sequentially supplies the respective scanning lines with a control signal and supplies the respective signal lines with a video signal to carry out a correction operation for holding a voltage equivalent to a threshold voltage of the drive transistor in the holding capacitance, and subsequently performs a write operation for writing the video signal in the holding capacitance, and

before the correction operation, the drive section switches potentials at the bias line and adds a coupling voltage to the one current terminal of the drive transistor via the auxiliary capacitance to carry out a preparation operation for an initialization to set a potential difference between the control terminal and the one current terminal of the drive transistor larger than the threshold voltage.

2. The display apparatus according to claim 1 ,

wherein when the preparation operation is carried out, the drive section holds the signal line at a reference potential and turns ON the sampling transistor to write the reference potential in the control terminal of the drive transistor.

3. The display apparatus according to claim 1 ,

wherein the pixel performs a negative feedback of a current flowing between the current terminals in pair of the drive transistor to the holding capacitance during the write operation to carry out a correction in accordance with a mobility of the drive transistor on the video signal written in the holding capacitance.

4. The display apparatus according to claim 1 ,

wherein after the write operation, the pixel supplies the light emitting element with the drive current from the one current terminal of the drive transistor in accordance with the video signal written in the holding capacitance, and

wherein after the write operation, the drive section turns OFF the drive transistor and cuts off the control terminal of the drive transistor from the signal line to enable a bootstrap operation in which a potential at the control terminal of the drive transistor follows a potential variation at the one current terminal of the drive transistor.

5. A drive method for a display apparatus which includes a pixel array section and a drive section,

the pixel array section including scanning lines arranged in rows, signal lines SL arranged in columns, pixels arranged in matrix at positions where the scanning lines respectively intersect with the signal lines, and bias lines arranged in parallel to the respective scanning lines,

each of the pixels at least including a sampling transistor, a drive transistor, a light emitting element, a holding capacitance, and an auxiliary capacitance,

a control terminal of the sampling transistor being connected to the scanning line, and current terminals in pair of the sampling transistor being connected between the signal line and a control terminal of the drive transistor,

one of current terminals in pair of the drive transistor being connected to the light emitting element, and the other terminal being connected to the power supply line,

the holding capacitance being connected between the control terminal and the one current terminal of the drive transistor, and

the auxiliary capacitance being connected between the one of current terminals of the drive transistor and the bias line,

the drive method comprising the steps of:

instructing the drive section to sequentially supply the respective scanning lines with a control signal and supply the respective signal lines with a video signal to carry out a correction operation for holding a voltage equivalent to a threshold voltage of the drive transistor in the holding capacitance, and subsequently perform a write operation for writing the video signal in the holding capacitance; and

instructing, before the correction operation, the drive section to switch potentials at the bias line and add a coupling voltage to the one current terminal of the drive transistor via the auxiliary capacitance to carry out a preparation operation for an initialization to set a potential difference between the control terminal and the one current terminal of the drive transistor larger than the threshold voltage.

6. An electronic equipment comprising the display apparatus according to claim 1 .

7. A display device comprising:

a pixel array section; and

a drive section,

the pixel array section including pixels arranged in matrix and bias lines,

each of the pixels including a drive transistor, a light emitting element, a holding capacitance, and an auxiliary capacitance,

the auxiliary capacitance being connected between a current terminal of the drive transistor and the bias line,

wherein the drive section is configured to carry out a correction operation for holding a voltage equivalent to a threshold voltage of the drive transistor in the holding capacitance, and

the drive section switches potentials at the bias line and adds a coupling voltage to the current terminal of the drive transistor via the auxiliary capacitance to set a potential difference between the control terminal and the current terminal of the drive transistor larger than the threshold voltage.

8. An electronic equipment comprising the display apparatus according to claim 7 .