Patent ID: 9449550
Filing Date: 2016-09-20
CPC Classification: G09G

Claim Text:
1. An organic light emitting diode (OLED) display device, comprising: an organic light emitting diode; a scan line to apply a scan signal; a control line to apply a control signal; a data line to apply a data signal; a drive transistor comprising a source and a drain, one of which is electrically connected to the organic light emitting diode and an other of which is electrically connected to a second node to apply a drive current to the organic light emitting diode according to a voltage of a first node, the drive transistor further comprising a gate electrode electrically connected to the first node; a first switching transistor comprising a source and a drain, one of which is electrically connected to the data line and an other of which is directly electrically connected to the gate electrode of the drive transistor at the first node, and a gate electrode electrically connected to the scan line, the first switching transistor being turned on/off according to the scan signal from the scan line; a second switching transistor comprising a source and a drain, one of which is electrically connected to the second node and an other of which is electrically connected to a power supply line to apply at least a portion of the drive current to the organic light emitting diode via the drive transistor, and a gate electrode coupled to the control line, the second switching transistor being turned on/off according to the control signal from the control line; a first capacitor directly electrically connected to the first node and directly electrically connected to the power supply line; and a second capacitor electrically connected between the first node and the second node, wherein capacitances of the first and second capacitors are different from each other, and wherein the second node is directly connected to a source of the drive transistor, the second capacitor, and a drain of the second switching transistor.