Patent ID: 7133010

Claim:
A data-driving apparatus of an electro-luminescence display panel, comprising: a display panel receiving a current signal to display an image; and a data driver having a plurality of current sink data drive parts in order to supply data to the display panel based on a constant current, at least one of the plurality of current sink data drive parts including a current sink data drive integrated circuit for supplying the data to the display panel based on the constant current, and a reference current supply/path part for supplying the constant current to the current sink data drive integrated circuit and supplying the same constant current to an adjacent current sink data drive part in a cascade circuit configuration, the reference current supply/path part including a first switching device connected between a second voltage source and the ground voltage source, a second switching device connected to the ground voltage source to form a current mirror circuit with the first switching device, a third switching device connected to the ground voltage source to form a current mirror circuit with the first switching device and, in addition, connected to a drain terminal of the constant current switching device of the current sink data drive integrated circuit, a fourth switching device connected between the second switching device and a third voltage source, and a fifth switching device connected to the third voltage source to form a current mirror circuit with the fourth switching device for transmitting the constant current to the adjacent current sink data drive part.