Patent ID: 8115713

Claim:
An image processing apparatus for performing processing of an image being input to a display device, comprising: a frame doubling processing part for generating a doubled image signal by dividing one frame period of an input image signal that has been input into two sub-frames and repeating the input image signal twice; a false impulse drive processing part for outputting a signal obtained by dividing the doubled image signal into two sub-frames of different gradation levels whose time integral of luminance realizes luminance in one frame period of the input image signal as a current image signal; a first frame memory for outputting a previous image signal delayed by one sub-frame after storing the current image signal output by the false impulse drive processing part; a correction processing part for correcting the gradation level of the current image signal in accordance with a difference of the gradation level of the previous image signal and that of the current image signal after the previous image signal and the current image signal being input thereto so as to form a corrected signal; a second frame memory for outputting a delayed doubled image signal delayed by one sub-frame after storing the doubled image signal; a movement detector for outputting a movement detection signal by determining whether a still image or a dynamic image is concerned in accordance with a difference of the gradation level of the delayed doubled image signal and that of the doubled image signal after the delayed doubled image signal and the doubled image signal being input thereto; and a selector which selects and outputs the signal outputted from the false impulse drive processing part or the corrected signal from the correction processing part based on the movement detection signal, such that (i) the signal outputted from the false impulse drive processing part is selected and outputted when the movement detector determines that the still image is concerned and (ii) the corrected signal is selected and outputted when the movement detector determines that the dynamic image is concerned.