Display device drive device, display device, and drive device or display device check method

A display device drive device includes a signal processing section for correcting an input digital image signal and outputting a digital corrected signal, an analog signal output section for outputting an analog image signal to a plurality of image output terminals, a signal switching selection for successively selecting an analog image signal from the analog signal output section, and a delta/sigma modulator for delta/sigma-modulating the analog image signal selected by the signal switching section and feedback-inputs the created 1-bit digital modulated signal to the signal processing section. The signal processing section successively outputs initial output data Vinit0 to Vinitm to the analog signal output section, receives a modulated signal for the initial output data Vinit0 to Vinitm from the delta/sigma modulator so as to calculate correction data. Thus, even if irregularities are caused in the non-linear electric characteristic between output terminals in the display drive LSI of ultra-multi-pin output, it is possible to sufficiently correct them with a high accuracy.