OLED pixel circuit and display device

Abstract

The invention provides an OLED pixel circuit and a display device, and the OLED pixel circuit comprises a plurality of pixel units which are distributed in an array, and each pixel unit comprises a first writing unit which receives a first scanning signal and writes an initial signal; the second writing unit is used for receiving the second scanning signal and writing the data signal; the drivingunit receives the power supply signal and is connected with the first write-in unit and the second write-in unit to receive the initial signal and the data signal to generate a driving signal so as togenerate a matched driving current by utilizing the power supply signal; the light-emitting control unit is used for receiving the light-emitting enable signal and is connected with the driving unitand the corresponding light-emitting diode so as to drive the light-emitting diode by utilizing the driving current; wherein the initial signal is associated with the power supply signal and the threshold signal of the driving unit, and the driving signal is associated with the power supply signal, the threshold signal of the driving unit and the data signal, so that the driving current generatedby the driving unit is only associated with the data signal. The problem of uneven display caused by threshold voltage and resistance on a power line is solved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an OLED pixel circuit and a display device. Background technique [0002] Active (active) matrix organic light emitting diode (Active-matrix Organic Light Emitting Diode, AMOLED) compared with other display technologies such as LCD (Liquid Crystal Display, liquid crystal display), AMOLED display technology has self-illumination, wide color gamut, wide Viewing angle, high contrast ratio, low power consumption and many other advantages make AMOLED shine in the field of flat panel display. [0003] AMOLED pixel drive single circuit is usually composed of LTPS-TFT (Low-temperature polysilicon thinfilm transistor, low-temperature polysilicon thin film transistor), but the LTPS process will cause uneven electrical characteristics of thin film transistors, such as threshold voltage shift between different pixels, will cause The problem of uneven display is caused, and the resistance o...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide an OLED pixel circuit and a display device, so as to solve the problem of uneven display caused by the threshold voltage and the resistance on the power supply wiring at the same time.

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