Method of compensating for kick-back voltage and liquid crystal display using the same

A non-transitory computer-readable recording medium having embodied thereon a computer program to execute a method, wherein the method comprises:

• correcting input pixel data using a kick-back correction function that meets a condition on which a response characteristic of a voltage detected from a pixel electrode of a liquid crystal cell for a positive input pixel signal and a response characteristic of a voltage detected from the pixel electrode of the liquid crystal cell for a negative input pixel signal become symmetrical without causing a saturation state on a basis of a kick-back voltage measured from an LCD panel to generate corrected pixel data;
• and
• driving the LCD panel using the corrected pixel data,
• wherein the kick-back correction function is set such that the input pixel data is multiplied by a scale constant having a value between 0 and 1 and then twice the kick-back voltage is added to the multiplication result as an offset value to generate corrected pixel data for pixels to which a positive pixel signal is applied, and the input pixel data is multiplied by the scale constant to generate corrected pixel data for pixels to which a negative pixel signal is applied.

A liquid crystal display (LCD), comprising:

• an LCD panel including a plurality of gate lines and a plurality of data lines arranged in an intersecting manner in a matrix to display an image corresponding to a pixel data voltage applied to the data lines according to a gate pulse signal applied to the gate lines through LCD elements;
• a controller to generate a gate control signal to select gate lines and a data control signal to output corrected pixel data for each data line, and to correct input pixel data using a kick-back correction function that meets a condition on which a response characteristic of a voltage detected from a pixel electrode of a liquid crystal cell for a positive input pixel signal and a response characteristic of a voltage detected from the pixel electrode of the liquid crystal cell for a negative input pixel signal become symmetrical without causing a saturation state on a basis of a kick-back voltage measured from each of a plurality of sections of the LCD panel to generate corrected pixel data;
• and
• a gate driver to apply the gate driving pulse to gate lines selected by the gate control signal;
• and
• a data driver to generate a voltage corresponding to the corrected pixel data and applying the voltage to a corresponding data line,
• wherein the kick-back correction function is set such that the input pixel data is multiplied by a scale constant having a value between 0 and 1 and then twice the kick-back voltage is added to the multiplication result as an offset value to generate corrected pixel data for pixels to which a positive pixel signal is applied, and the input pixel data is multiplied by the scale constant to generate corrected pixel data for pixels to which a negative pixel signal is applied.

A liquid crystal display (LCD), comprising:

• an LCD panel having a plurality of sections to display an image;
• a detector to detect kick-back voltages from one or more of the plurality of sections;
• and
• a kick-back correction unit to apply the detected kick-back voltages to a kick-back correction function to obtain corrected pixel data,
• wherein the kick-back correction function is set such that input pixel data of the image to be displayed is multiplied by a scale constant having a value between 0 and 1 and then twice the kick-back voltage is added to the multiplication result as an offset value to generate corrected pixel data for pixels to which a positive pixel signal is applied, and the input pixel data is multiplied by the scale constant to generate corrected pixel data for pixels to which a negative pixel signal is applied.

A method of operating a liquid crystal display (LCD), the method comprising:

• obtaining kick-back voltages from one or more of a plurality of sections of an LCD panel;
• and
• applying the obtained kick-back voltages to a kick-back correction function;
• and
• obtaining corrected pixel data based on the applied obtained voltages to the kick-back correction function,
• wherein the kick-back correction function is set such that input pixel data of the image to be displayed is multiplied by a scale constant having a value between 0 and 1 and then twice the kick-back voltage is added to the multiplication result as an offset value to generate corrected pixel data for pixels to which a positive pixel signal is applied, and the input pixel data is multiplied by the scale constant to generate corrected pixel data for pixels to which a negative pixel signal is applied.

A liquid crystal display (LCD), comprising:

• an LCD panel including a plurality of data lines to display an image corresponding to pixel data;
• and
• a controller to generate pixel data corrected with regard to input pixel data using a kick-back correction function established on a basis of a kick-back voltage measured from one or more of a plurality of sections of the LCD panel,
• wherein the kick-back correction function is set such that input pixel data of the image to be displayed is multiplied by a scale constant having a value between 0 and 1 and then twice the kick-back voltage is added to the multiplication result as an offset value to generate corrected pixel data for pixels to which a positive pixel signal is applied, and the input pixel data is multiplied by the scale constant to generate corrected pixel data for pixels to which a negative pixel signal is applied.