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Pixel circuit and driving method thereof and display device thereof

A pixel circuit and low-level technology, applied in the display field, can solve the problems of OLED display device current difference, threshold voltage drift, brightness difference, etc., to achieve the effect of improving display effect and improving uniformity

Active Publication Date: 2013-02-13
BOE TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the crystallization process and manufacturing level, the TFT switch circuits fabricated on large-area glass substrates often have non-uniformity in electrical parameters such as threshold voltage and mobility, which makes the threshold voltage shift of each TFT inconsistent. , which will lead to current differences and brightness differences of OLED display devices, which will be perceived by human eyes; in addition, the threshold voltage of TFT will also drift under long-term pressure and high temperature. The amount of threshold shift for different images is different, resulting in a difference in display brightness. Since this difference is related to the previously displayed image, it often appears as an afterimage phenomenon.

Method used

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  • Pixel circuit and driving method thereof and display device thereof
  • Pixel circuit and driving method thereof and display device thereof
  • Pixel circuit and driving method thereof and display device thereof

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Embodiment Construction

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] The pixel circuit 1 provided by the embodiment of the present invention, such as figure 1 shown, including:

[0030] The first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, the storage capacitor C and the light emitting device L.

[0031] The first electrode of the first transistor T1 is connected to one end of the light emitting device L, and the second el...

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Abstract

The invention provides a pixel circuit and a driving method thereof and a display device thereof, and relates to display technical field. The pixel circuit can effectively compensate threshold value voltage drift of thin film transistor (TFT), improve uniformity of luminance brightness of the display device, and improve display effect. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a storage capacitance and a luminescent device. The pixel circuit and the driving method thereof and the display device thereof are used for manufacture of display panels.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to a pixel circuit, a driving method thereof, and a display device. Background technique [0002] Organic Light Emitting Diode (OLED), as a current-type light-emitting device, is increasingly used because of its self-luminescence, fast response, wide viewing angle, and the ability to be fabricated on flexible substrates. in the field of high-performance displays. OLED can be divided into PMOLED (Passive Matrix Driving OLED, passive matrix driving organic light emitting diode) and AMOLED (Active Matrix Driving OLED, active matrix driving organic light emitting diode) according to the driving method. With the increase of the size of the display device, the conventional PMOLED usually needs to reduce the driving time of a single pixel, and thus needs to increase the transient current, which leads to a substantial increase in power consumption. In the AMOLED technology, ...

Claims

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Application Information

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IPC IPC(8): G09G3/32G09G3/3233
Inventor 盖翠丽吴仲远段立业
Owner BOE TECH GRP CO LTD
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