Display apparatus and method of driving the same

A display apparatus comprising:

• a display panel configured to display an image;
• a position detector configured to determine a position of a user;
• a driving controller configured to generate an overdriving value according to a grayscale value of previous frame data and a grayscale value of present frame data;
• a gate driver configured to output gate signals to the display panel;
• and
• a data driver configured to output data voltages to the display panel based on the overdriving value,
• wherein the driving controller is further configured to:
• receive a plurality of overdriving data of a plurality of viewing angles;
• determine a fixed parameter based on the plurality of overdriving data of the plurality of viewing angles;
• determine a viewing angle of the user based on the position of the user;
• determine a variable parameter based on the fixed parameter and the viewing angle;
• generate an overdriving reference line based on the fixed parameter and the variable parameter;
• receive shift overdriving data generated for a grayscale value which is different from the grayscale value of each of the plurality of overdriving data;
• determine a shift value of the overdriving reference line according to grayscale values based on the shift overdriving data;
• and
• generate the overdriving value based on the overdriving reference line and a shifted overdriving reference line,
• wherein the plurality of the overdriving data comprises:
• a first overdriving data group measured in a first viewing angle when the grayscale value of the previous frame data is a first grayscale value;
• a second overdriving data group measured in a second viewing angle when the grayscale value of the previous frame data is the first grayscale value;
• a third overdriving data group measured in a third viewing angle when the grayscale value of the previous frame data is the first grayscale value;
• and
• a default overdriving data group measured regardless of the viewing angle when the grayscale value of the previous frame data is the first grayscale value,
• wherein the first overdriving data group comprises:
• a first overdriving data measured in the first viewing angle when the grayscale value of the previous frame data is the first grayscale value and the grayscale value of the present frame data is a second grayscale value;
• and
• a second overdriving data measured in the first viewing angle when the grayscale value of the previous frame data is the first grayscale value and the grayscale value of the present frame data is a third grayscale value,
• wherein the default overdriving data group comprises:
• a third overdriving data measured when the grayscale value of the previous frame data is the first grayscale value and the grayscale value of the present frame data is the first grayscale value;
• and
• a fourth overdriving data measured when the grayscale value of the previous frame data is the first grayscale value and the grayscale value of the present frame data is a maximum grayscale value.

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

• determining a fixed parameter based on a plurality of overdriving data of a plurality of viewing angles, the fixed parameter being the same regardless of any one from among the plurality of viewing angles;
• determining a position of a user with respect to a display panel;
• determining a viewing angle of the user based on the position of the user;
• determining a variable parameter based on the fixed parameter and the viewing angle;
• generating an overdriving reference line based on the fixed parameter and the variable parameter;
• determining a shift value of the overdriving reference line according to grayscale values based on shift overdriving data generated for a grayscale value which is different from the grayscale value of each of the plurality of overdriving data;
• generating an overdriving value based on the overdriving reference line and a shifted overdriving reference line;
• generating a data voltage based on the overdriving value;
• and
• outputting the data voltage to the display panel.