Pixel control method and display device using the same

A display device, comprising:

• at least one display panel in which data lines, gate lines, and pixels are provided;
• a data driver configured to convert pixel data into a data voltage and supply the data voltage to the data lines;
• a gate driver configured to supply gate signals to the gate lines;
• and
• a timing controller configured to transmit the pixel data to the data driver and control the data driver and the gate driver,
• wherein the timing controller includes:
• a maximum grayscale detector configured to set a maximum grayscale value of one-frame data of an input image as a maximum input grayscale;
• a pixel data converter configured to match the maximum input grayscale with a maximum output grayscale and match input grayscales equal to or smaller than the maximum input grayscale with grayscales equal to or smaller than the maximum output grayscale;
• and
• a duty calculator configured to select duty data of a light emission signal controlling a lighting period of the pixels according to the maximum input grayscale, and
• wherein the maximum input grayscale varies depending on a maximum grayscale value of the input image,
• the maximum output grayscale is a grayscale value determined according to a number of bits of pixel data,
• the lighting period of the pixels indicated by the duty data varies depending on the maximum input grayscale, and
• the gate signals include the light emission signal.