Patent ID: 7421375

Claim:
An organic electroluminescent device, comprising: a plurality of scan lines in a first direction; a plurality of data lines in a second direction different from the first direction; a panel having a plurality of pixels formed on crossing areas of data lines and scan lines; and a data driving circuit which drives the pixels according to a display data and a brightness control data inputted from external apparatuses, wherein the data driving circuit comprises: a display data recognizing circuit which receives the display data from a first external apparatus of the external apparatuses; and a current generating circuit which receives brightness control data from a second external apparatus of the external apparatuses, and applies a data current according to the display data recognized in the display data recognizing circuit and the brightness control data to the data lines, wherein the display data recognizing circuit and current generating circuit simultaneously receive the display data and the brightness control data from the first external apparatus and the second external apparatus respectively.