| 摘要 |
An OLED(Organic Light Emitting Diode) display device is provided to maintain brightness constant by minimizing voltage drop caused from supplying wires of a driving voltage. A storage capacitor(Cs) is connected between first and second nodes. An OLED element(OLED) is connected between a third node and a base voltage source. First and second scan lines(EM,SCAN) supply first and second scan signals. A data line(Vdata), which is formed to cross with the scan lines, supplies a data voltage. A first switch(M1) maintains an off-state during a first period and supplies a reference voltage to the first node in response to the first scan signal during a second period. A second switch(M2) supplies the data voltage to the first node in response to the second scan signal during the first period and then maintains an off-state during the second period. A third switch(M3) adjusts current for the OLED element. A fourth switch(M4) supplies a reference current to the second node in response to the second scan signal during the first period and then maintains an off-state during the second period. A fifth switch(M5) forms a current path between the second and third nodes in response to the second scan signal and then maintains an off-state during the second period. A sixth switch(M6) blocks current to the OLED element during the first period and forms a current path between the third node and the OLED element in response to one of the first scan signal and the voltage of the second node during the second period.
|
