Display apparatus and control method thereof

A control method of a display apparatus comprising a panel configured to include red (R), green (G), and white (W) subpixels, and a backlight configured to provide the panel with backlight using at least one of a white light source and a blue light source, the method comprising:

• converting image data into red (R), green (G), and blue (B) subframe data;
• turning on the R, G, and W subpixels according to the R, G, and B subframe data, respectively;
• turning on the W subpixel;
• setting brightness of the white light source according to a brightness value corresponding to a minimum value among the R, G, and B subframe data;
• providing the panel with white light at the set brightness;
• turning on subpixels respectively corresponding to remaining subframe data other than the R, G, and B subframe data corresponding to the brightness value;
• and
• setting at least one of the brightness of the white light source and a brightness of the blue light source, and providing the panel with light at the set brightnesses.

A display apparatus comprising:

• a panel comprising a red (R), a green (G), and a white (W) subpixel;
• a backlight comprising a white light source and a blue light source and configured to provide light to the panel;
• and
• a controller configured to turn on the W subpixel, drive the white light source based on a minimum value among R, G, and B subframe data, determine remaining R, G, and B subframe data by subtracting the smallest value from each of the R, G, and B subframe data, turn on subpixels among the R, G, and W subpixels according the remaining R, G, and B subframe data respectively, and drive at least one of the white light source and the blue light source based on the remaining R, G, and B subframe data.