Display device and method of driving the same

A method of driving a display device, the method comprising:

• applying, by a data driver circuit, a black data to a first subpixel of a plurality of subpixels in a predetermined cycle;
• and
• applying a scan signal and a sense signal, by which a characteristic of a driving transistor of the first subpixel is sensed, in a period between points in time at which the black data is applied, and the scan signal and the sense signal of a turn-on level do not overlap the black data,
• wherein each of the plurality of subpixels includes:
• an organic light-emitting diode driven by the driving transistor;
• a switching transistor electrically connected between a gate node of the driving transistor and a data line among a plurality of data lines;
• a sensing transistor electrically connected between a source node or a drain node of the driving transistor and a reference voltage line;
• and
• a storage capacitor electrically connected between the gate node and the source node or the drain node of the driving transistor,
• wherein the scan signal is for controlling an operation of the switching transistor included in the first subpixel, and the sense signal is for controlling an operation of the sensing transistor included in the first subpixel.

A display device, comprising:

• a display panel including a plurality of gate lines, a plurality of data lines, and a plurality of subpixels;
• a gate driver circuit driving the plurality of gate lines;
• a data driver circuit driving the plurality of data lines;
• and
• a timing controller controlling signals applied to the gate driver circuit and the data driver circuit,
• wherein, neither image data nor black data is applied to the plurality of subpixels in a first blank period, the timing controller controls gate signals to sense a characteristic of a driving transistor in each of the plurality of subpixels in the first blank period and controls a recovery voltage to be applied in a second blank period subsequent to the first blank period to reset the plurality of subpixels on which characteristics sensing has been performed in the first blank period, and
• wherein, a first gate signal applied to a first subpixel of the plurality of subpixels in the first blank period does not overlap the black data applied to the first subpixel,
• wherein the first blank period includes:
• an initialization period in which a sensing data voltage is supplied through a data line of the plurality of data lines and a sensing reference voltage is supplied through a reference voltage line electrically connected to the first subpixel;
• a tracking period in which a voltage of the reference voltage line is increased by blocking the sensing reference voltage;
• and
• a sampling period in which the characteristic of a driving transistor in the first subpixel is sensed through the reference voltage line.

A method of driving a display device, the method comprising:

• neither image data nor black data is applied to a plurality of subpixels in a first blank period, applying gate signals to sense a characteristic of a driving transistor in each of the plurality of subpixels in a first blank period;
• and
• applying a recovery voltage in a second blank period to reset the plurality of subpixels on which characteristic sensing has been performed in the first blank period, wherein the second blank period is subsequent to the first blank period,
• wherein, a first signal of the gate signals for a first subpixel of the plurality of subpixels in the first blank period does not overlap the black data applied to the first subpixel,
• wherein the first blank period includes:
• an initialization period in which a sensing data voltage is supplied through a data line and a sensing reference voltage is supplied through a reference voltage line electrically connected to the first subpixel;
• a tracking period in which the sensing reference voltage to the first subpixel is blocked;
• and
• a sampling period in which the characteristic of a driving transistor in the first subpixel is sensed through the reference voltage line.

A display device, comprising:

• a display panel including a plurality of gate lines, a plurality of data lines, and a plurality of subpixels;
• a gate driver circuit driving the plurality of gate lines;
• a data driver circuit driving the plurality of data lines;
• and
• a timing controller controlling signals applied to the gate driver circuit and the data driver circuit,
• wherein the timing controller controls the data driver circuit to apply a black data to another data line spaced apart from a data line, to which an image data is applied, by a certain distance, and for a blank period in which neither the image data nor the black data is applied, the timing controller controls the gate driver circuit to apply a gate signal to sense a characteristic of a driving transistor in each of the plurality of subpixels, such that the gate signal does not overlap the black data,
• wherein the blank period includes a first blank period in which the timing controller controls the gate signal to sense the characteristic of the driving transistor and a second blank period subsequent to the first blank period in which the timing controller controls a recovery voltage to be applied to reset the plurality of subpixels on which characteristics sensing has been performed in the first blank period,
• wherein the first blank period includes:
• an initialization period in which a sensing data voltage is supplied through a data line and a sensing reference voltage is supplied through a reference voltage line electrically connected to a first subpixel;
• a tracking period in which the sensing reference voltage to the first subpixel is blocked;
• and
• a sampling period in which the characteristic of a driving transistor in the first subpixel is sensed through the reference voltage line.

A method of driving a display device including a display panel in which a plurality of data lines and a plurality of gate lines are disposed, a plurality of subpixels are aligned in intersected areas by the data lines and the gate lines to light organic light-emitting diodes via driving transistors, a data driver circuit driving the plurality of data lines, and a gate driver circuit driving the plurality of gate lines, the method comprising:

• applying, by the data driver circuit, black data to apply a black data to another data line spaced apart from a data line, to which an image data is applied, by a certain distance;
• and
• for a blank period in which the image data is not applied, applying, by the gate driver circuit, a gate signal to sense a characteristic of a driving transistor in each of the plurality of subpixels, such that the gate signal does not overlap the black data,
• wherein the blank period includes a first blank period in which a timing controller controls the gate signal to sense the characteristic of the driving transistor and a second blank period subsequent to the first blank period in which the timing controller controls a recovery voltage to be applied to reset the plurality of subpixels on which characteristics sensing has been performed in the first blank period
• wherein the first blank period includes:
• an initialization period in which a sensing data voltage is supplied through a data line and a sensing reference voltage is supplied through a reference voltage line electrically connected to a first subpixel;
• a tracking period in which the sensing reference voltage to the first subpixel is blocked;
• and
• a sampling period in which the characteristic of a driving transistor in the first subpixel is sensed through the reference voltage line.