Patent ID: 7091937

Claim:
A display device comprising: a plurality of signal lines disposed on a substrate; a plurality of scanning lines intersecting said signal lines substantially at right angles; a plurality of pixel switches disposed near intersections of said signal lines and scanning lines; a plurality of display pixels selectable by said pixel switches; and a signal line driving circuit which supplies analog video signals to the signal lines; wherein each of said display pixels includes one of two or more electroluminescent elements different from each other in a dominant wavelength of light emitted therefrom, the different electroluminescent elements are arrayed in a scanning line direction, and said signal line driving circuit comprises: a selector circuit which selectively outputs one of gradation reference voltage groups corresponding to the different electroluminescent elements; a conversion circuit including a plurality of digital-to-analog converters which are arranged such that the signal lines are divided into a plurality of signal line blocks each having a predetermined number of signal lines, convert a digital signal externally input for each signal line block into an analog signal based on the gradation reference voltage group selectively output from said selector circuit to set an individual color intensity level for at least one of the electroluminescent elements, and serially output the analog signal as the analog video signal; and a signal line selection circuit which sequentially distributes the analog video signal from said conversion circuit to related signal lines of the signal line block.