Pixel circuit, drive method and display device thereof

Abstract

The invention provides a pixel circuit, a drive method and a display device of the pixel circuit. The pixel circuit comprises a luminous device and a drive transistor, wherein the luminous device and the drive transistor are connected in series between a first voltage signal terminal and a second voltage signal terminal. The pixel circuit further comprises a luminous control module and a compensation module, wherein an input end of the luminous control module is connected with a first control signal, an output end of the luminous control module is connected with a source electrode and a drain electrode of the drive transistor for responding to the first control signal and controlling a state of the drive transistor, and the luminous device is enabled to emit light or be closed. An input end of the compensation module is connected with a second control signal. An output end of the compensation module is connected with a grid electrode and the source electrode of the drive transistor and the luminous control module for responding to the second control signal to switch off or switch on connection between the grid electrode of the drive transistor and the source electrode of the drive transistor, and the luminous device is enabled to drive voltage at the position of the grid electrode of the drive transistor to compensate threshold voltage of the drive transistor during light emission. According to the scheme, the problem that uniformity of luminous luminance of a light emitting diode is poor is solved.

Description

Technical field [0001] The present invention relates to the field of display manufacturing, in particular to a pixel circuit, a driving method thereof, and a display device. Background technique [0002] Active matrix organic light-emitting diode (AMOLED) display is a new display technology. Compared with field-effect thin-film transistor (TFT) liquid crystal display (LCD), AMOLED has many advantages in terms of viewing angle range, image quality, efficiency and cost. There is huge development potential in the field of display manufacturing. [0003] The ability of AMOLED to emit light is driven by the current generated by the driving TFT in the saturation state, because when the same gray-scale voltage is input, different threshold voltages will produce different driving currents, resulting in poor current consistency and brightness uniformity. difference. [0004] Such as figure 1 The traditional 2T1C circuit shown in the circuit contains only two TFTs, T1 is a switch tube, DTFT ...

AI Technical Summary

Problems solved by technology

[0005] Based on the above, the purpose of the technical solution of the present invention is to provide a pixel circuit, its driving method, and a display device, which are used to compensate the Vth uniformity of the drive tube in the pixel circuit, and solve the problem of poor uniformity of light emitting diode brightness.

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