Display device and method of controlling backlight of display device

A display device comprising:

• a backlight including a plurality of backlight blocks;
• a display panel configured to display an image with light from the backlight;
• and
• a controller,
• wherein the controller is configured to:
• acquire video data;
• determine provisional luminance values for the plurality of backlight blocks based on the video data;
• determine an adjustment coefficient for a backlight block of interest selected from the plurality of backlight blocks;
• determine an adjusted luminance value for the backlight block of interest based on the provisional luminance value and the adjustment coefficient for the backlight block of interest;
• and
• control the backlight block of interest in accordance with the adjusted luminance value, and
• wherein, in determining the adjustment coefficient for the backlight block of interest, the controller is configured to:
• calculate a statistic of provisional luminance values for a plurality of reference backlight blocks including backlight blocks adjacent to the backlight block of interest;
• calculate a relative value of the statistic with respect to the provisional luminance value for the backlight block of interest;
• and
• determine the adjustment coefficient for the backlight block of interest based on the relative value and a predefined function.