Patent ID: 7936328

Claim:
A display device comprising: a display panel including a plurality of pixels are arranged in rows and columns; and a plurality of data drivers connected with said display panel, wherein each of said plurality of data drivers includes: a grayscale voltage generator circuit generating a plurality of grayscale voltages; and a drive circuitry selecting a grayscale voltage from said plurality of grayscale voltages in response to input display data, and outputting a data signal having a voltage level corresponding to said selected grayscale voltage to said display panel; wherein said grayscale voltage generator circuit comprises: an amplifier generating a voltage bias including an offset voltage; and a voltage generator circuit generating said plurality of grayscale voltages from said voltage bias; wherein: said amplifier is configured such that a polarity of said offset voltage is reversible, said polarity of said offset voltage in a first frame period is opposite to said polarity of said offset voltage during a second frame period, said selected grayscale voltage corresponds to color-reduced data generated through color-reduction of said input display data, said color reduction is achieved by using a frame rate control error value selected from a set of 2 n values during one frame period, where n is an integer greater than zero, said data signal is output to a specific pixel from among said plurality of pixels and a polarity of said data signal is switched across different frame periods, and said data signal is output to said specific pixel based on a unique combination of said polarity of data signal, said polarity of said offset voltage, and said frame rate control error value during one frame period, and said unique combination repeats every 2 n ×2×2 frame periods for said specific pixel.