PIXEL DRIVING CIRCUIT OF ORGANIC-LIGHT EMITTING DIODE

摘要

A pixel driving circuit of an organic light emitting diode includes a first transistor including a first terminal, a control terminal and a second terminal and a capacitor including a first terminal and a second terminal. The first terminal and the second terminal of the capacitor are electrically coupled to the first terminal and the control terminal of the first transistor at a first node and a second node respectively. In a first period, a power source does not provide a power supply voltage to the first node, and a data voltage and a variable voltage are written in the first node and the second node respectively. In a second period, the power source provides the power supply voltage to the first node. The first transistor provides a driving current to an organic light emitting diode based on the voltage of the first node and the second node.

主权项

1. A pixel driving circuit of an organic light-emitting diode, comprising:
a first transistor, comprising:
a first terminal, electrically coupled to a power source;a control terminal; anda second terminal, electrically coupled to an organic light-emitting diode; and a capacitor, comprising:
a first terminal, electrically coupled to the first terminal of the first transistor at a first node; anda second terminal, electrically coupled to the control terminal of the first transistor at a second node; wherein in a first period, the power source does not provide a power supply voltage to the first node, and a data voltage is written in the first node and a variable voltage is written in the second node; and wherein in a second period, the power source provides the power supply voltage to the first node, such that the voltage of the first node is pulled up to the power supply voltage, and the voltage of the second node is correspondingly pulled up to the sum of the variable voltage and the power supply voltage subtracting the data voltage, and the first transistor provides a driving current to the organic light-emitting diode based on the voltage of the first node and the voltage of the second node.