A pixel circuit, its driving method and display panel

Abstract

The embodiment of the present invention discloses a pixel circuit, a driving method thereof, and a display panel. The discharge module in the pixel circuit is electrically connected to the storage module; the comparison module includes a first input terminal, a second input terminal and an output terminal, and the first input terminal and the storage module The common terminals of the storage module and the discharge module are electrically connected, the second input terminal is used to input a reference voltage, the output terminal of the comparison module is electrically connected to the control terminal of the drive module; the drive module is used to drive the light emitting module according to the voltage output from the output terminal of the comparison module glow. During the light-emitting phase, the discharge module discharges the storage module, and the comparison module compares the voltage input by the first input terminal with the reference voltage input by the second input terminal, and outputs to the control terminal of the drive module to turn the drive module on or off The fixed voltage makes the drive module have a constant drive current when it is turned on. When the light-emitting module is an inorganic light-emitting diode, the characteristics of high luminous efficiency of the inorganic light-emitting diode at high current can be fully utilized.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a pixel circuit, a driving method thereof, and a display panel. Background technique [0002] With the development of display technology, inorganic light-emitting diode display panels, such as micro Light Emitting Diode (micro LED) display panels, are more and more widely used because of their advantages of high brightness, good luminous efficiency, and low power consumption. [0003] The inorganic light emitting diode display panel includes a pixel circuit that drives the inorganic light emitting diode to emit light. In the prior art, different data voltages are usually written into the gate of the driving transistor in the pixel circuit to control the current of the driving transistor that drives the inorganic light emitting diode, and then Controls different display gray scales. [0004] The light-emitting efficiency of the inorganic light-emitting...

AI Technical Summary

Problems solved by technology

[0004] The luminous efficiency of inorganic light-emitting diodes is high when they work at high currents. Using the driving method of the existing pixel circuit to drive inorganic light-emitting diodes cannot make full use of the high-efficiency characteristics of inorganic light-emitting diodes at high currents.

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