Pixel unit circuit and compensating method of pixel unit circuit as well as display device

Abstract

A pixel unit circuit and a compensating method therefor, and a display apparatus. The pixel unit circuit comprises a driving transistor (T1), a first transistor (T2), a second transistor (T3), a third transistor (T4), a fourth transistor (T5), a storage capacitor (CST), and a luminescent device (OLED). By using the pixel unit circuit and the compensating method therefor and the display apparatus, the internal compensation and the external compensation can be combined to compensate the luminescent device (OLED), and advantages of the internal compensation and the external compensation are simultaneously are achieved; the color non-uniformity caused by the threshold voltage non-uniformity or drift of an N type depletion type or enhancement type TFT driving tube is effectively eliminated by means of the internal compensation, thereby improving the display effect; in addition, functions of driving the TFT characteristics and extracting the characteristics of the luminescent apparatus are realized, and the pixel unit circuit and the compensating method therefor and the display apparatus can effectively applicable to external compensation driving.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel unit circuit, a compensation method thereof, and a display device. Background technique [0002] Organic Light-Emitting Diode (OLED, Organic Light-Emitting Diode), as a current-mode light-emitting device, has been increasingly used in high-performance display devices. Traditional passive matrix organic light-emitting display tubes (Passive Matrix OLED) require shorter driving time of a single pixel with the increase of display size, thus need to increase transient current and increase power consumption. At the same time, the application of high current will cause the voltage drop on the nano-indium tin metal oxide line to be too large, and the working voltage of the OLED device will be too high, thereby reducing its efficiency. The active matrix organic light-emitting display tube (AMOLED, Active Matrix OLED) can solve these problems well by inputting the OLED c...

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Problems solved by technology

[0014] The present invention provides a pixel unit circuit and its compensation method, as well as a display device, which are used to solve the problem that the pixel unit circuit in the prior art cannot combine internal compensation and external compensation, and solve the problem that the compensation of the light emitting device and the corresponding pixel unit circuit The non-uniformity of the threshold voltage of the driving transistor occurs, and it has the function of extracting the circuit characteristics of the driving transistor and the light-emitting device, so as to facilitate external compensation, and finally achieve the purpose of eliminating the uneven color of the display device

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