Patent ID: 7250929

Claim:
An active matrix display device comprising: a plurality of video signal lines formed on a substrate; a plurality of pixels which are connected to the video signal lines and are operated by current signals; and a video current supply section which converts a digital data signal, that is supplied from an external circuit, to a corresponding analog current signal, and outputs the analog current signal to the associated video signal line, the video current supply section including a plurality of DA units which are disposed in association with the respective video signal lines, and sums up at least one of a plurality of gray-level reference currents on the basis of the digital data signal, thereby executing conversion to the analog current signal; a refresh pulse generating circuit which successively outputs refresh timing pulses for controlling a timing for periodically storing the gray-level reference currents in said plurality of DA units; and output current hold circuits which are disposed in association with the respective video signal lines, successively store the analog current signals, and output the analog current signals as a batch to said plurality of video signal lines, and the output current hold circuit including a transistor which stores the analog current signal at a selection time and outputs the stored analog current signal at a non-selection time.