Patent ID: 7847771
Filing Date: 2010-12-07
Classification: G09G

Abstract:
1. A display device comprising: a display panel including a plurality of pixels; a first drive circuit for outputting a display signal corresponding to display data with a gray-scale to said pixels; a second drive circuit for outputting a select signal to said pixels, said select signal selecting a pixel which receives said display signal; a first conversion circuit for receiving said display data in a frame period, converting said display data in an n-th frame period, where n is an integer of two or more, in accordance with a value of a gray-scale of display data in an n−1 th frame period and a value of a gray-scale of said display data in the n-th frame period, and outputting m display data in m periods in said n-th frame period, where m is an integer of two or more; and a second conversion circuit for converting each of said m display data in such a manner that said pixels provide a luminance corresponding to the gray-scale of said display data input during said n-th frame period by using said m display data, wherein: said first drive circuit outputs said display signal corresponding to each gray-scale value of said m display data supplied from said second conversion circuit in each of said m periods in said n-th frame period, to said pixels; at least one of said m display data has either one of an upper limit gray-scale value or a lower limit gray-scale value of a dynamic range of said display data; at least another of said m display data has a gray-scale value which changes responsive to a change of the gray-scale value of said display data in said n-th frame period from said display data in said n−1 th frame period, the gray-scale value of the at least another of said m display data being determined in accordance with a gray-scale value change between said display data in said n−1 th frame period and said display data in said n-th frame period; said first conversion circuit increases a gray-scale value of at least one display data other than display data having the upper limit gray-scale value of the dynamic range among said m display data in said n-th frame period, if a gray-scale value of said display data in said n-th frame period is larger than a gray-scale value of said display data in said n−1 th frame period; and said first conversion circuit decreases a gray-scale value of at least one display data other than display data having the lower limit gray-scale value of the dynamic range among said m display data in said n-th frame period, if a gray-scale value of said display data in said n-th frame period is smaller than a gray-scale value of said display data in said n−1 th frame period.