Apparatus and method for reducing color error in display having sub-pixel structure

A display for displaying image data comprising a plurality of pixels each comprising at least two sub-pixels, the display comprising:

• a measurer which measures differences of brightness values of at least two pixels or sub-pixels positioned in each of set directions according to a control command;
• a selector which compares the differences of the brightness values from the measurer and selecting one of the differences as a reference direction;
• a controller which selects a sub-pixel to be displayed and at least one pixel or sub-pixel neighboring the sub-pixel to be displayed in the reference direction;
• and
• a filter filtering which filters a brightness value of the sub-pixel to be displayed and brightness values of the selected at least one pixel or sub-pixel according to the control command output from the controller.

A method of display image data comprising a plurality of pixels each comprising at least two sub-pixels, the method comprising:

• setting at least two directions relative to a sub-pixel to be displayed and calculating differences of brightness values of at least two pixels or sub-pixels positioned in each of the set directions;
• selecting one of the differences and determining a reference direction indicated by the selected difference;
• determining a filter for filtering at least one sub-pixel or pixel neighboring the sub-pixel to be displayed in the reference direction;
• and
• filtering a brightness value of the sub-pixel to be displayed and a brightness value of the at least one sub-pixel or pixel which is selected and re-assigning the filtered brightness value to the sub-pixel to be displayed.