Patent ID: 7663575

Claim:
A driving circuit for controlling a current applied to an organic electroluminescent element, the driving circuit comprising: a first switching element configured to output a data signal supplied from a data line in response to a scan signal supplied from a scan line, the data signal corresponding to a gray scale voltage; a second switching element configured to output a first reference voltage supplied from a first reference voltage line in response to the scan signal; a storage capacitor configured to store a first voltage corresponding to a voltage difference between the data signal and the first reference voltage; a first driving element configure to output a bias voltage supplied from a bias voltage line in response to an inversion signal that has a substantially inverted phase with respect to the scan signal; a second driving element configured to control a level of the bias voltage based on the first voltage and connected at a node to the organic electroluminescent element to provide the organic electroluminescent element with the current having a level corresponding to the first voltage, wherein the second switching element is directly electrically connected to the node where the second driving element is connected to the organic electroluminescent element; and an inverter for outputting an inversion signal to the control line in response to the scan signal, wherein the inverter comprises first and second transistors.