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

A technology of pixel unit and compensation method, which is applied in the direction of static indicators, instruments, etc., can solve the problems of non-uniform threshold voltage of driving transistors, combination, etc., and achieve the effect of improving display effect and eliminating color unevenness

Active Publication Date: 2013-08-07
BOE TECH GRP CO LTD
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  • Abstract
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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

Method used

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

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Embodiment Construction

[0065] In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0066] The pixel unit circuit described in the embodiment of the present invention is mainly used for driving and compensating the light-emitting device OLED. Device composition. This structure can be used for both internal and external compensation. The display process of internal compensation is divided into 3 processes, which are preflush, compensation and display. The external compensation is divided into two processes, which are the current extraction of the TFT drive tube and the current extraction of the light emitting device. Compared with the traditional pixel structure, it can effectively compensate the threshold voltage drift and non-uniformity of the enhanced or depleted TFT drive tube, as well as the non-uniformity and aging of the voltage of the light-emitting device.

[0067...

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Abstract

The invention discloses a pixel unit circuit, which comprises a driving transistor, a first transistor, a second transistor, a third transistor, a fourth transistor, a storage capacitor and a luminescent device. The pixel unit circuit, a compensating method of the pixel unit circuit as well as a display device have the advantages that the internal compensation and the external compensation can be synthesized for compensating the luminescent device, the advantages of the internal compensation and the external compensation are simultaneously realized, the color non-uniformity caused by drifting or the threshold voltage heterogeneity of an N type depletion type or enhancement type TFT (thin film transistor) driving tube is effectively eliminated through the internal compensation, the display effect is improved, in addition, the functions of driving the TFT characteristics and extracting the characteristics of the luminescent device are realized, and the pixel unit circuit, the compensating method and the display device can effectively adapt 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G2300/0819G09G2300/0842G09G2300/0861G09G2320/0233G09G2320/043G09G2310/0251G09G2320/029G09G3/3233G09G3/2003G09G2310/0248G09G2310/0289G09G2320/045
Inventor 吴仲远段立业
Owner BOE TECH GRP CO LTD
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