Patent ID: 7675491

Claim:
A display device comprising: a pixel array in which a plurality of display pixels are arranged in a two-dimensional manner in the vicinity of cross points between a plurality of scanning lines arranged in a row direction and a plurality of data lines arranged in a column direction which is divided into a plurality of column groups composed of the display pixels of a predetermined number of columns; a scan drive circuit which sequentially applies scan signals to each of the plurality of scanning lines, and then, selectively sets the display pixels of each row of the pixel array at an active state; a signal drive circuit which produces a signal current that controls display gradation of the plurality of display pixels, based on display data, and then, sequentially outputs the signal current that corresponds to the display pixels for one row of the display array, via output terminals, the number of which is equal to the number of the columns included in the column group, by signal currents corresponding to each of the column groups; and a current latch circuit having input terminals, the number of which is equal to that of the output terminals, the input terminals being connected to the output terminals, and a plurality of current capturing circuit portions and current latch circuit portions that correspond to each of the plurality of column groups, the current latch circuit sequentially capturing the signal currents produced via the input terminals in each of the current latch circuits via each of the current capturing circuit portions; holding a signal current for one row of the pixel array and generating a gradation current that corresponds to the display pixels for one row of the pixel array, based on the held signal current, in parallel to each other, the current latch circuit simultaneously supplying the generated gradation current to the plurality of data lines in accordance with a timing of setting the display pixels of each row at an active state by the scan drive circuit; and wherein the pixel array and the current latch circuit are formed on a display panel substrate, and each of the output terminals of the signal drive circuit is electrically connected to each of the input terminals of the current latch circuit.