Patent ID: RE40489

Claim:
A display-driving device for a display comprising a driving section including a large number of picture elements arranged in a matrix form for displaying a picture image corresponding to a supplied image signal, said display-driving device comprising: a first driving circuit for selecting said picture elements at least in one row unit, a second driving circuit for outputting display information composed of an ON signal and an OFF signal to a selected row, and a signal control circuit for controlling said first and second driving circuits, wherein: a display period for one image is defined as one field, and in order to perform gradation control based on a temporal modulation system, said signal control circuit determines, in said one field, a light emission start timing and a contiguous light emission maintenance period having a variable length, independent of a selection/unselection state of a predetermined picture element, depending on a gradation level of said predetermined picture element , wherein said contiguous light emission maintenance period is provided by a memory function of said predetermined picture element .