Patent ID: 7173595
Filing Date: 2007-02-06
Classification: G09G

Abstract:
1. A display device comprising a pixel array in which a plurality of pixel rows each of which includes a plurality of pixels arranged in parallel along the first direction are arranged in parallel along the second direction which intersects the first direction, a scanning driver circuit which selects the plurality of respective pixel rows in response to a scanning signal, a data driver circuit which supplies a display signal to the respective pixels included in at least one row selected in response to the scanning signal out of the plurality of pixel rows, and a display control circuit which controls a display operation of the pixel array, wherein lines of video data are inputted to the data driver circuit one after another for every horizontal scanning period of the video data, the data driver circuit alternately repeats (i) a first step for generating a display signal corresponding to each one of the lines of the video data one after another for every fixed period and outputting the display signal to the pixel array N-times (N being a natural number equal to or greater than 2) and (ii) a second step for generating a display signal which makes the luminance of the pixels lower than the luminance of the pixel in the first step for the fixed period and outputting the display signal to the pixel array M-times (M being a natural number smaller than N), the scanning driver circuit alternately repeats (i) a first selection step for selecting the plurality of pixel rows for every Y rows (Y being a natural number smaller than the N/M) sequentially from one end to another end of the pixel array along the second direction in the first step and (ii) a second selection step for selecting the plurality of pixel rows other than the pixel rows (Y×N) selected in the first selection step for every Z rows (Z being a natural number not smaller than N/M) sequentially from one end to another end of the pixel array along the second direction in the second step, and the display device further includes a means which sets a ratio of display in the second step per one frame period, and a means which measures the number of pulses of a horizontal synchronizing signal in one frame period contained in the video data, and determines a point of time for starting display in the second step in response to pulses of the horizontal synchronizing signal corresponding to the ratio based on a measured value of the number of pulses.