Pixel circuit, drive method thereof and display panel

Abstract

The invention discloses a pixel circuit, a drive method of the pixel circuit and a display panel. The pixel circuit comprises a first transistor, a first capacitor, an organic light emitting diode, a second transistor, a third transistor, a fourth transistor, a fifth transistor and a sixth transistor. The first transistor is used for responding to a first scanning line signal and transmitting a first signal voltage. The first capacitor is used for storing the first signal voltage. The second transistor provides a drive current for the organic light emitting diode. The third transistor is used for responding to a second scanning line signal and transmitting a first potentiallevel signal to the second transistor. The fourth transistor is used for responding to the first scanning line signal and connecting the first end of the second transistor with the third end of the second transistor in a conducted mode so that diode connection can be formed. The fifth transistor is used for responding to a third scanning line signal and transmitting a second signal voltage to the second transistor. The sixth transistor is used for responding to a light emitting scanning line signal, receiving the drive current of the second transistor, and outputting the drive current to the organic light emitting diode.

Description

technical field [0001] The invention relates to a flat panel display, in particular to a pixel circuit in an organic light-emitting device capable of realizing threshold compensation, a driving method thereof, and a display panel. Background technique [0002] Generally, organic light-emitting devices can be classified into passive matrix organic light emitting diode (OLED, organic light emitting diode) and active matrix OLED (AMOLED, active matrix OLED), and are classified into current-driven OLED and voltage-driven OLED according to the method of driving the EL element. Drive OLEDs. A typical AMOLED usually includes a plurality of gate lines, a plurality of data lines, a plurality of power supply lines, and a plurality of pixels connected to these lines and arranged in a rectangular form. Each pixel generally includes: an EL element; two transistors, one is a switching transistor for transmitting a data signal, and the other is a driving transistor for driving the EL elem...

AI Technical Summary

Problems solved by technology

[0003] Although AMOLED has the advantage of low power consumption, there is a phenomenon that the driving transistor leads to the conduction of the light-emitting diode during the reset phase of the gate potential, which causes the OLED display panel to be not dark enough when it is working in the dark state, and directly leads to the insufficient contrast of the OLED display panel.

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