Patent ID: 8384636

Claim:
An overdriving apparatus, adapted for generating an overdriving frame to drive a display panel comprising a plurality of display areas, the overdriving apparatus comprising: a memory unit, storing a present frame received and outputting a previous frame stored in the memory unit; a position unit, generating pixel position information according to a display control signal of the present frame; and an overdriving unit, determining a corresponding relationship between a plurality of pixel grey values of the present frame and the display areas according to the pixel position information, so as to select a corresponding specific table group of each of the pixel grey values from a plurality of overdriving tables and generate the overdriving frame by looking up the corresponding specific table group of each of the pixel grey value, wherein the overdriving tables are corresponding to a portion of the display areas and are established according to response times of liquid crystals corresponding to the portion of the display areas, and the overdriving unit comprises: a data arithmetic device, looking up the specific table group according to the present frame and the previous frame so as to acquire a first overdriving value and a second overdriving value, and entering the first overdriving value, the second overdriving value and an area value of each of the display areas respectively corresponding to the pixel grey values into a mathematical formula so as to convert the pixel grey values into a plurality of overdriving grey values, wherein the overdriving unit generates the overdriving frame according to the overdriving grey values, and when the area value of each of the display areas respectively corresponding to the pixel grey values are ARi, and the first overdriving value, the second overdriving value and the area values of the display areas respectively corresponding to the specific table groups are respectively V 01 , V 02 , AR 1 and AR 2 , the mathematical formula which is used to convert each of the pixel grey values into the corresponding overdriving grey value ODi is expressed as: ODi = VO ⁢ ⁢ 1 ± ARi - AR ⁢ ⁢ 1 AR ⁢ ⁢ 2 - AR ⁢ ⁢ 1 ⁢ ( VO ⁢ ⁢ 1 - VO ⁢ ⁢ 2 ) .