Patent ID: 9324275
Filing Date: 2016-04-26
CPC Classification: G09G

Claim Text:
1. An organic light emitting diode (OLED) display device, comprising: a plurality of sub-pixels disposed in a display panel, wherein each of the plurality of subpixels comprises: a first transistor supplying a data voltage to a first node according to a first scan signal, a second transistor, a first electrode of the second transistor being connected to the first node, and a gate of the second transistor being connected to a second electrode of the second transistor, a third transistor having a gate electrode and a source electrode connected to each other, and configured to initialize a voltage of a second node according to a second scan signal, the second node being the second electrode of the second transistor, a capacitor, one end of the capacitor being connected to the second node, and the other end of the capacitor being connected to a third node to which a high-level source voltage is applied, a driving transistor, a gate of the driving transistor being connected to the second node, and a source of the driving transistor being connected to the third node; and an OLED comprising an anode and a cathode, and emitting light with a voltage applied to the cathode, the anode being connected to a fourth node that is a drain of the driving transistor: and a timing controller configured to: divide a frame period into a scan period and an emission period, wherein the scan period includes an initialization period, a sampling period and a holding period, during the scan period, sequentially supply, to each sub-pixel in the plurality of sub-pixels, a high-level voltage for the first scan signal and a low-level voltage for the second scan signal during the initialization period, the low-level voltage for the first scan signal and the high-level voltage for the second scan signal during the sampling period, and the high-level voltage for the first scan signal and the high-level voltage for the second scan signal during the holding period, wherein a high-level source voltage is supplied to the cathode electrode in each of the OLEDs respectively included in the plurality of sub-pixels and the OLEDs not emitting light during the scan period, and wherein a low-level source voltage is supplied to the cathode electrode in each of the OLEDs respectively included in the plurality of sub-pixels and the OLEDs simultaneously emitting light during the emission period.