Patent ID: 9626905
Date: 2017-04-18
CPC Classifications: G09G

Claim:
1. A pixel circuit for an electroluminescent display, comprising: a scan transistor connected between a data line and a first node and having a gate electrode configured to receive a scan signal; a first capacitor connected between a first power supply voltage and the first node; a second capacitor connected between the first node and a second node; a driving transistor connected between the first power supply voltage and a third node and having a gate electrode connected to the second node; an emission control transistor connected between the third node and a fourth node and having a gate electrode configured to receive an emission control signal; a light-emitting diode (LED) connected between the fourth node and a second power supply voltage less than the first power supply voltage; and a compensation circuit configured to i) initialize the second node to an initial voltage during a first compensation period and ii) electrically connect the second node to the third node during a second compensation period following the first compensation period, wherein the compensation circuit includes a first transistor directly connected to both the second node and an initial voltage node having the initial voltage, wherein the first transistor comprises a gate electrode configured to receive a first compensation control signal configured to be activated during the first compensation period, wherein the initial voltage node is directly connected to only the first transistor, and wherein the compensation circuit is further configured to apply a reference voltage to the first node during the first and second compensation periods.