Adaptive black clipping circuit, display device including the same and adaptive black clipping method

A display device comprising:

• a display panel comprising a plurality of pixels coupled to a plurality of data lines and a plurality of gate lines;
• an adaptive black clipping circuit configured to provide output image data based on input image data;
• a data driver configured to output data voltages corresponding to the output image data to the plurality of data lines;
• and
• a gate driver configured to output gate driving signals to the plurality of gate lines, wherein the adaptive black clipping circuit comprises:
• a data corrector configured to correct the input image data to generate corrected image data such that the corrected image data is greater than or equal to a black clipping value, the black clipping value is greater than zero and corresponds to the input image data having a grayscale value of zero;
• a register configured to store and provide configuration data;
• a pattern detector configured to generate a pattern detection signal based on the input image data corresponding to a plurality of pixel rows;
• and
• a clipping selector configured to select one of the corrected image data and the configuration data in response to the pattern detection signal to provide the output image data,
• wherein the pattern detector comprises:
• a first detector configured to receive a first input image data of a current pixel row to generate a first detection signal that is activated when the first input image data is black data;
• a buffer configured to receive the first input image data to output second input image data of a previous pixel row adjacent to the current pixel row;
• a second detector configured to receive the second input image data to generate a second detection signal that is activated when the second input image data is black data;
• and
• a logic gate configured to perform a logic operation on the first detection signal and the second detection signal to generate the pattern detection signal that is activated when both of the first detection signal and the second detection signal are activated.