Patent ID: 7855699

Claim:
A driver circuit which drives each display pixel of a display panel comprising a plurality of display pixels arranged along a plurality of rows and a plurality of columns, the driver circuit comprising: a pixel selection circuit which sets display pixels that are arranged in a predetermined number of rows and the plurality of columns of the display panel to a selection state simultaneously, wherein the predetermined number of rows is a section of at least two of the plurality of rows; a current generation circuit; and a plurality of current holding circuits formed respectively corresponding to the plurality of columns; wherein the current generation circuit, which is supplied with a gradation signal to provide a display gradation for each of the display pixels, (i) generates signal currents having current values corresponding to values of the gradation signals which correspond to the display pixels set to the selection state simultaneously by the pixel selection circuit, and (ii) sequentially supplies the signal currents corresponding to the display pixels of each column of the predetermined number of rows to each of the current holding circuits by timing in time series; wherein each of the current holding circuits comprises a predetermined number of current storage circuits, where the predetermined number is equal to the number of rows set to the selection state simultaneously by the pixel selection circuit; wherein each of the current storage circuits, which is supplied with the signal currents from the current generation circuit corresponding to the predetermined number of rows of the display pixels in time series, (i) takes-in and holds the signal current according to the timing in time series, and (ii) outputs simultaneously gradation currents based on the signal currents held in each of the display pixels for the predetermined number of rows set to the selection state simultaneously by the pixel selection circuit; wherein each of the current storage circuits comprises a pair of current storage sections arranged in parallel; and wherein the pairs of current storage sections are controlled to perform simultaneously in parallel: an operation which takes-in and holds the signal currents outputted from the current generation circuit in one of the pairs of current storage sections; and an operation which outputs the gradation currents to the display pixels based on the signal currents held in the other one of the pairs of current storage sections.