Display device
A display device includes a display panel including a subpixel connected to a power line, a data line, and a reference line; a power supply configured to supply power to the display panel through the power line; a data driver including a driving circuit configured to supply a data voltage to the display panel through the data line, and a sensing circuit configured to sense the display panel through the reference line; and a timing controller configured to control the power supply and the data driver, wherein the sensing circuit may have a variable sampling point for sensing the display panel in response to a change in a level of the power.
1 . A display device, comprising:
a display panel comprising a subpixel connected to a power line, a data line, and a reference line;
a power supply configured to supply power to the display panel through the power line;
a data driver comprising:
a driving circuit configured to supply a data voltage to the display panel through the data line; and
a sensing circuit configured to sense the display panel through the reference line; and
a timing controller configured to control the power supply and the data driver,
wherein the sensing circuit has a variable sampling point for sensing the display panel in response to a change in a level of the power, and
wherein the sensing circuit is further configured to:
advance a sampling time from a reference sampling time when the level of the power becomes higher than a reference level; and
delay the sampling time from the reference sampling time when the level of the power becomes lower than the reference level.
2 . The display device according to claim 1 , wherein:
the sensing circuit comprises a sampling circuit configured to sense the reference line; and
the sampling time corresponds to a turn-on time of the sampling circuit.
3 . The display device according to claim 1 , wherein the timing controller is further configured to:
calculate a level of a first power required to drive the display panel based on a data signal to prepare a first power calculation value; and
generate a sampling control signal for varying the sampling time based on the first power calculation value.
4 . The display device according to claim 3 , wherein the timing controller is further configured to generate a sampling control signal for varying the sampling time based on one of a first power sensing value prepared by sensing a first power output from the power supply and the first power calculation value.
5 . A display device, comprising:
a display panel comprising a subpixel connected to a power line, a data line, and a reference line;
a power supply configured to supply power to the display panel through the power line;
a data driver comprising:
a driving circuit configured to supply a data voltage to the display panel through the data line; and
a sensing circuit configured to sense the display panel through the reference line to prepare a sensing voltage; and
a timing controller configured to control the power supply and the data driver,
wherein the timing controller is further configured to:
prepare a sensing voltage corrected by reflecting a change of a level of the power in the sensing voltage transmitted from the sensing circuit; and
compensate for a data signal based on the corrected sensing voltage to generate a compensated data signal.
6 . The display device according to claim 5 , wherein the timing controller is further configured to:
calculate a level of a first power required to drive the display panel based on the data signal to prepare a first power calculation value;
predict a change of the level of the first power based on the first power calculation value; and
reflect the predicted change in the sensing voltage to prepare the corrected sensing voltage.
7 . The display device according to claim 6 , wherein the timing controller is further configured to:
predict a change of the level of the first power based on one of a first power sensing value prepared by sensing a first power output from the power supply and the first power calculation value; and
reflect the predicted change in the sensing voltage to prepare the corrected sensing voltage.
8 . The display device according to claim 7 , wherein the timing controller is further configured to generate a sampling control signal that varies a sampling time for sensing the display panel based on one of the first power sensing value and the first power calculation value.
9 . The display device according to claim 8 , wherein:
the sensing circuit comprises a sampling circuit configured to sense the reference line to prepare the sensing voltage, and
the sampling time corresponds to a turn-on time of the sampling circuit.
10 . The display device according to claim 6 , wherein the timing controller comprises a lookup table including a data table for preparing the corrected sensing voltage in response to a change in the level of the first power.