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US 11,538,396 B2Granted
Display device, drive circuit, and driving method
AssigneeLG Display Co., Ltd.
InventorJaehyuk Lee
Life of this patent
Estimating the term…
Abstract
Provided are a display device, a drive circuit, and a driving method. An accurate threshold voltage compensation value is calculated by finely and incrementally correcting the threshold voltage compensation value in real time during display driving. Consequently, a threshold voltage is accurately and rapidly compensated for.
Claims13
A display device comprising:
- a display panel comprising a plurality of data lines, a plurality of scan signal lines, a plurality of sense signal lines, a plurality of reference voltage lines, and a plurality of subpixels, each of the plurality of subpixels comprising an emitting diode, a driver transistor, and a storage capacitor;
- a data driver circuit configured to output image data voltages to the plurality of data lines;
- and
- a gate driver circuit configured to output scan signals to the plurality of scan signal lines and output sense signals to the plurality of sense signal lines,
- wherein the plurality of subpixels include a first subpixel connected to a first data line from among the plurality of data lines and a first reference voltage line from among the plurality of reference voltage lines,
- wherein the data driver circuit is configured to output a sensing driving first data voltage to the first data line during a first blank period and output a sensing driving second data voltage that is different from the sensing driving first data voltage to the first data line during a second blank period that is after the first blank period, and
- wherein the second data voltage supplied to the first data line during the second blank period is set different from the first data voltage depending on whether a current flows through a driver transistor in the first subpixel during the first blank period,
- wherein, when the current flows through the driver transistor in the first subpixel during the first blank period, the sensing driving second data voltage supplied to the first data line during the second blank period is set less than the sensing driving first data voltage, and
- when the current does not flow through the driver transistor in the first subpixel during the first blank period, the sensing driving second data voltage supplied to the first data line during the second blank period is set greater than the sensing driving first data voltage.
6 more elements
A method of driving a display device comprising a plurality of data lines, a plurality of scan signal lines, a plurality of sense signal lines, a plurality of reference voltage lines, and a plurality of subpixels, the method comprising:
- a first sensing operation of outputting a sensing driving first data voltage to a first data line, from among plurality of data lines, connected to a first subpixel, from among a plurality of subpixels, during a first blank period;
- and
- a second sensing operation of outputting a sensing driving second data voltage that is different from the sensing driving first data voltage to the first data line connected to the first subpixel during a second blank period after the first blank period,
- wherein the sensing driving second data voltage supplied to the first data line during the second blank period is set different from the sensing driving first data voltage depending on whether or not a current flows through a driver transistor in the first subpixel during the first blank period,
- wherein, when the current flows through the driver transistor in the first subpixel during the first blank period, the sensing driving second data voltage supplied to the first data line during the second blank period is set less than the sensing driving first data voltage, and
- when the current does not flow through the driver transistor in the first subpixel during the first blank period, the sensing driving second data voltage supplied to the first data line during the second blank period is set greater than the sensing driving first data voltage.
3 more elements
A drive circuit of a display device comprising a plurality of data lines, a plurality of scan signal lines, a plurality of sense signal lines, a plurality of reference voltage lines, and a plurality of subpixels, the drive circuit comprising:
- a data voltage output circuit configured to output data voltages to the plurality of data lines;
- and
- a power switch configured to control a connection between a reference voltage supply node to which a reference voltage is applied and a corresponding reference voltage line from among the plurality of reference voltage lines,
- wherein the data voltage output circuit is configured to output a sensing driving first data voltage to the first data line during a first blank period and output a sensing driving second data voltage different from the sensing driving first data voltage to the first data line during a second blank period after the first blank period, and
- the sensing driving second data voltage supplied to the first data line during the second blank period is set different from the sensing driving first data voltage depending on whether or not a current flows through a driver transistor in the first subpixel during the first blank period,
- wherein, when the current flows through the driver transistor in the first subpixel during the first blank period, the sensing driving second data voltage supplied to the first data line during the second blank period is set less than the sensing driving first data voltage, and
- when the current does not flow through the driver transistor in the first subpixel during the first blank period, the sensing driving second data voltage supplied to the first data line during the second blank period is set greater than the sensing driving first data voltage.
4 more elements
Dependencies are inferred from the claim text.