Patent ID: 9691348
Date: 2017-06-27
CPC Classifications: G09G

Claim:
1. A pixel circuit for an organic light-emitting diode (OLED) display, the pixel circuit comprising: a current provider electrically connected to a current source and configured to perform a current sinking operation in response to a first scan signal and to adjust a driving current based on the current sinking operation; a digital driver configured to control a flow of the driving current provided from the current provider in response to a data signal and a second scan signal; and a plurality of pixel selectors configured to provide the driving current received from the digital driver to an OLED in response to a third scan signal, wherein the current provider includes: a first transistor including a gate electrode connected to a first node, a first electrode to which a first power supply voltage is applied, and a second electrode connected to a second node; a second transistor including a gate electrode to which the first scan signal is applied, a first electrode connected to the first node, and a second electrode connected to the second node; and a third transistor including a gate electrode to which the first scan signal is applied, a first electrode connected to the second node, and a second electrode connected to the current source, wherein the digital driver includes: a fourth transistor including a gate electrode to which the second scan signal is applied, a first electrode to which the data signal is applied, and a second electrode connected to a third node; and a fifth transistor including a gate electrode connected to the third node, a first electrode connected to the current provider, and a second electrode connected to the pixel selectors, wherein the second node is directly connected to all of the first, second, third and fifth transistors.