Display device

A display device comprising:

• a display panel comprising first group pixels connected to a first gate line to receive first data voltages, and second group pixels connected to the first gate line to receive second data voltages;
• a backlight source configured to provide light to the display panel;
• a signal controller configured to divide horizontal image signals into first group image signals and second group image signals, to extract a first maximum grayscale image signal from the first group image signals, and to extract a second maximum grayscale image signal from the second group image signals, wherein the signal controller comprises:
• a memory configured to receive the horizontal image signals;
• a maximum grayscale extractor configured to extract the first maximum grayscale image signal and the second maximum grayscale image signal;
• an image signal converter configured to convert the first group image signals to first converted image signals based on the first maximum grayscale image signal, and to convert the second group image signals to second converted image signals based on the second maximum grayscale image signal;
• and
• a dimmer configured to control the backlight source in response to the first and second maximum grayscale image signals;
• a power supply configured to generate first and second gamma driving voltages from a reference gamma driving voltage based on a grayscale level of the first maximum grayscale image signal and a grayscale level of the second maximum grayscale image signal;
• a first data driving circuit configured to apply the first data voltages generated based on the first gamma driving voltage and the first group image signals to the first group pixels;
• and
• a second data driving circuit configured to apply the second data voltages generated based on the second gamma driving voltage and the second group image signals to the second group pixels.

A display device comprising:

• a display panel comprising first group pixels connected to a first gate line to receive first data voltages, and second group pixels connected to the first gate line to receive second data voltages;
• a backlight source configured to provide light to the display panel;
• a signal controller configured to divide horizontal image signals into first group image signals and second group image signals, to extract a first minimum grayscale image signal from the first group image signals, and to extract a second minimum grayscale image signal from the second group image signals;
• a power supply configured to generate first and second gamma driving voltages from a reference gamma driving voltage based on a grayscale level of the first minimum grayscale image signal and a grayscale level of the second minimum grayscale image signal;
• a first data driving circuit configured to apply the first data voltages generated based on the first gamma driving voltage and the first group image signals to the first group pixels;
• and
• a second data driving circuit configured to apply the second data voltages generated based on the second gamma driving voltage and the second group image signals to the second group pixels.