Patent ID: 7522134

Claim:
A display device comprising: a display panel including a plurality of pixels arranged in a matrix of rows and columns, and switching elements each being connected to a corresponding one of the plurality of pixels; a row driving circuit for selecting a row in the plurality of pixels by supplying a selection signal to the switching elements; a column driving circuit for supplying a data signal to pixels connected to the switching elements selected with the selection signal; and a black display signal generation circuit for generating a black display signal for causing the plurality of pixels to perform a black display; a backlight; and a backlight regulation circuit; wherein the data signal and the black display signal are supplied to each of the plurality of pixels during a period corresponding to one vertical scanning period; the display device further includes a black ratio control signal generation circuit that is arranged to generate a black ratio control signal defining a ratio between a second period of retaining the black display signal and a first period of retaining the data signal; and the backlight regulation circuit adjusts an on luminance of the backlight based on the black ratio control signal.