LIGHT-EMITTING COMPONENT DRIVING CIRCUIT AND RELATED PIXEL CIRCUIT AND APPLICATIONS USING THE SAME

摘要

A pixel circuit relating to an organic light emitting diode (OLED) is provided by the invention, and if the circuit configuration (5T1C or 6T1C) thereof collaborates with suitable operation waveforms, the current flowing through an OLED in the OLED pixel circuit is not be changed along with variation of a power supply voltage (Vdd) influenced by the IR drop, and is not be varied along with the threshold voltage (Vth) shift of a TFT used for driving the OLED. Accordingly, the brightness uniformity of the applied OLED display can be substantially improved.

主权项

1. A light-emitting component driving circuit, comprising:
a driving unit, coupled between a power supply voltage and a light-emitting component, and comprising a driving transistor configured to control a driving current flowing through the light-emitting component in a light enable phase; a light-emitting control unit, coupled between the driving unit and the light-emitting component, and configured to conduct the driving current come from the driving unit to the light-emitting component in response to a light enable signal in the light enable phase; and a data storage unit, coupled to the driving unit, comprising a storage capacitor, and configured to store a data voltage and a threshold voltage related to the driving transistor through the storage capacitor in response to a writing scan signal in a data-writing phase, and control terminal voltages of the storage capacitor in response to the light enable signal in the light enable phase, wherein in the light enable phase, the driving unit generates the driving current flowing through the light-emitting component in response to a cross-voltage of the storage capacitor, and the driving current is not influenced by the threshold voltage of the driving transistor and the power supply voltage.