Patent ID: 8022924

Claim:
A field sequential liquid crystal display (LCD), comprising: a control unit for receiving pixel data, which comprises red sub-pixel data, green sub-pixel data, blue sub-pixel data and black sub-pixel data, wherein the control unit outputs the red and blue sub-pixel data during a first sub-frame period of a frame period and outputs the green sub-pixel data during a second sub-frame period of the frame period; a backlight unit comprising a white light emitting diode (LED) and a green LED, which are driven by the control unit to output white light and green light during the first and second sub-frame periods, respectively, wherein the white and green LEDs are disabled during the second and first sub-frame periods, respectively; and a display unit comprising a plurality of pixel units, each of which comprises: a first sub-pixel, which comprises a red color filter and displays a red data frame according to the red sub-pixel data and the white light during the first sub-frame period; a second sub-pixel, which comprises a blue color filter and displays a blue data frame according to the blue sub-pixel data and the white light during the first sub-frame period; and a third sub-pixel, which comprises a green color filter and displays a green data frame according to the green sub-pixel data and the green light during the second sub-frame period; wherein the control unit provides the black sub-pixel data to the first and second sub-pixels during the second sub-frame period, and provides the black sub-pixel data to the third sub-pixel during the first sub-frame period; during the first sub-frame period, the control unit concurrently outputs the red, the blue and the black sub-pixel data to the first, the second and the third sub-pixels, respectively; and during the second sub-frame period, the control unit concurrently outputs the black, the black and the green sub-pixel data to the first, the second and the third sub-pixels, respectively.