Method and device for controlling display of display device

A display control device for controlling a display of a display device, wherein the display device includes a red sub pixel, a green sub pixel, a first blue sub pixel, and a second blue sub pixel emitting light having a different central wavelength from that of the first blue sub pixel, the display control device comprising:

• a display mode controller to set a display mode of the display device to emit blue light as one of a first mode in which the first blue sub pixel is used, a second mode in which the second blue sub pixel is used, and a third mode in which both the first blue sub pixel and the second blue sub pixel are used;
• and
• a data converter to sub pixel render red input data, green input data, and blue input data according to an arrangement of the red sub pixel, the green sub pixel, the first blue sub pixel, and the second blue sub pixel, and to convert the red input data, the green input data, and the blue input data into output data,
• wherein the sub pixel rendering by the data converter includes selecting a size and a coefficient of a rendering filter with respect to each of the red input data, green input data, and blue input data according to the display mode, and
• wherein a size and a coefficient of a rendering filter for the blue input data are different from a size and a coefficient of a rendering filter for the red input data in the first mode, and the size and the coefficient of the rendering filter for the blue input data are different from the size and the coefficient of the rendering filter for the red input data in the second mode.