Liquid crystal display and driving method thereof

A liquid crystal display device, comprising:

• frequency converting means for multiplying a frame frequency of an inputted current frame to continuously output a multiplied odd-numbered frame and a multiplied even-numbered frame;
• frame discriminating means for determining whether the current frame is a still image frame or a dynamic image frame to generate a first selection signal or a second selection signal in accordance with the determined result;
• gray level converting means for converting gray level values of pixels at the multiplied odd-numbered frame and the multiplied even-numbered frame;
• and
• selecting means for substantially continuously outputting the multiplied odd-numbered still image frame and the multiplied even-numbered still image frame in response to said first selection signal or substantially continuously outputting the odd-numbered dynamic image frame and the multiplied even-numbered dynamic image frame having gray levels converted by the gray level converting means in response to said second selection signal.

A method of driving a liquid crystal display device, comprising:

• (A) if a current frame is inputted in such a state that a previous frame has been stored, multiplying a first frame frequency into a second frame frequency to generate the same still image frames or the same dynamic image frames driven substantially continuously within a certain time;
• (B) converting gray level values of pixels at the generated frames to be driven with said second frame frequency;
• (C) determining whether the current frame is a still image frame or a dynamic image frame with the aid of said previous frame to generate a first selection signal or a second selection signal in accordance with the determined result;
• and
• (D) substantially continuously outputting the generated still image frames in response to said first selection signal and substantially continuously outputting the dynamic image frames having the converted gray levels in response to said second selection signal.