Display device including a white sub-pixel and method of driving the same

摘要

A display device is disclosed. The display device has pixels which include three color sub-pixels, for example, red, green, and blue sub-pixels. The pixels also include a white sub-pixel. The display calculates data for the red, green, blue, and white sub-pixels based on data for red, green, and blue sub-pixels.

主权项

1. A display device comprising:
a data mapping unit configured to: i) determine a minimum value from input color data of three colors, ii) determine white output color data by multiplying the minimum value by a gain ratio, and iii) determine output color data of the three colors by subtracting the white output color data from each of the input color data of three colors; a gain adjustment unit configured to adaptively change the gain ratio based on an image being displayed; and a display panel comprising a plurality of pixels, wherein each pixel is formed of a white sub-pixel and a sub-pixel of each of the three colors, wherein the display panel is configured to display an image using the sub-pixels according to the output color data of the three colors and the white output color data, wherein the gain adjustment unit is further configured to change the gain ratio based on an accumulated sum of color data for each of the red, green, blue, and white output color data, wherein the accumulated sum of color data for each of the red, green, blue and white output color data is the sum of the corresponding color data for all of the pixels of the display panel, and wherein the gain adjustment unit is further configured to: i) calculate a red comparative value, a green comparative value, and a blue comparative value by multiplying corresponding weights with the corresponding accumulated sums of color data, ii) calculate a white comparative value by using the accumulated sum of color data for the white output color data, and iii) determine the gain ratio by comparing the white comparative value with a sum of the three comparative values.