Display device and driving method thereof
AssigneeLG Display Co., Ltd.
InventorJin Hun Kim
Life of this patent
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Abstract
A display device includes a display panel including a subpixel having a light emitting device emitting light according to an on duty ratio of an emission control signal and a driving transistor supplying a driving current to the light emitting device, and a data line connected to the subpixel, a controller configured to obtain a compensation value for compensating for an abnormal luminance variation of the display panel based on coupling between a gate node of the driving transistor and the data line and correct a data signal which is to be written in the display panel, based on the compensation value, and a data driver configured to convert a corrected data signal into a data voltage and output the data voltage to the data line.
Claims12
A display device comprising:
- a display panel including:
- a subpixel having a light emitting device configured to emit light according to an on duty ratio of an emission control signal and a driving transistor configured to supply a driving current to the light emitting device, and a data line connected to the subpixel;
- a controller configured to:
- obtain a compensation value for compensating for an abnormal luminance variation of the display panel based on coupling between a gate node of the driving transistor and the data line when a voltage of the data line is switched from a data voltage to a bias voltage in a vertical blank period of one frame, and
- correct a data signal which is to be written in the display panel, based on the compensation value;
- and
- a data driver configured to convert a corrected data signal into a data voltage and output the data voltage to the data line,
- wherein a gate voltage of the driving transistor varies based on a voltage variation of the data line.
A driving method of a display device having a display panel, the driving method comprising:
- obtaining a compensation value for compensating for an abnormal luminance variation of a display panel based on coupling between a gate node of a driving transistor and a data line when a voltage of the data line is switched from a data voltage into a bias voltage in a vertical blank period of one frame, and correcting a data signal which is to be written in the display panel, based on the compensation value, wherein the data line is connected to a subpixel included in the display panel;
- converting a corrected data signal into a data voltage;
- and
- outputting the data voltage to the data line,
- wherein a light emitting device included in the subpixel emits light according to an on duty ratio of an emission control signal,
- wherein a driving transistor included in the subpixel supplies a driving current to the light emitting device, and
- wherein a gate voltage of the driving transistor varies based on a voltage variation of the data line.
A display device comprising:
- a display panel including:
- a subpixel having a light emitting device, an emission control transistor, and a driving transistor;
- a scan line connected to a gate node of a first transistor;
- a data line connected to a first node of a second transistor;
- and
- a controller,
- wherein a first node of the emission control transistor is connected to a second node of the driving transistor, a second node of the emission control transistor is connected to the light emitting device, and an emission control signal is applied to a gate node of the emission control transistor, and
- wherein the controller obtains a compensation value by integrating the emission control signal over a vertical blank period.
Dependencies are inferred from the claim text.