Pixel unit circuit, pixel array, display panel and display panel driving method

摘要

A pixel circuit array is disclosed and includes pixel unit circuits, and each of the pixel unit circuit includes a precharge circuit, a compensation circuit, a holding circuit, a driving circuit, a light emitting circuit, a first power supply terminal, a second power supply terminal, a third power supply terminal, a scanning control terminal, a first control terminal and a second control terminal. With the pixel unit circuit, as long as the inputted direct-current reference voltage and the data voltage signal are not varied, the current delivered to the OLED remains constant, thus the uniformity of the OLED can be compensated for.

主权项

1. A pixel circuit array comprising:
scanning lines; data lines; and pixel unit circuits defined by the scanning lines and the data lines intersected with each other, each of the pixel unit circuits comprising: a light emitting circuit for emitting light; a driving circuit for driving the light emitting circuit; a precharge circuit for normally operating the driving circuit; a compensation circuit for compensating for the threshold voltage of the driving circuit; a holding circuit for holding voltages of a control terminal and an input terminal of the driving circuit; a first power supply terminal for supplying voltage to the precharge circuit; a second power supply terminal for supplying voltage to the driving circuit; a third power supply terminal for supplying voltage to the light emitting circuit; a scanning control terminal for controlling the precharge circuit to be operated or switched off; a first control terminal for controlling the holding circuit to be operated or switched off; and a second control terminal for controlling the compensation circuit to be operated or switched off, wherein the input terminal of the precharge circuit is connected to the first power supply terminal, a first output terminal thereof is connected to the input terminal of the holding circuit, the second output terminal thereof is connected to the input terminal of the compensation circuit and the control terminal of the driving circuit, and the control terminal thereof is connected to the scanning control terminal, wherein the output terminal of the compensation circuit is connected to the output terminal of the driving circuit and the input terminal of the light emitting circuit, and the control terminal thereof is connected to the second control terminal, wherein the output terminal of the holding circuit is connected to the input terminal of the driving circuit and the second power supply terminal, and the control terminal thereof is connected to the first control terminal, wherein the precharge circuit comprises a fourth transistor and a first capacitor, the compensation circuit comprises a second transistor, the holding circuit comprises a third transistor, the driving circuit comprises a first transistor, the light emitting circuit comprises an organic light emitting diode (OLED), and wherein, when the scanning control terminal outputs an active signal: the fourth transistor is turned on, the first control terminal and the second control terminal outputs an inactive signal, the second transistor and the third transistor are turned off, an active signal is input to the gate of the first transistor, the first transistor is turned on, and a first level signal outputted from the second power supply terminal is transmitted to the anode of the OLED through the first transistor.