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Pixel circuit and driving method therefor, array substrate, display panel and display device

A technology of pixel circuits and array substrates, applied in static indicators, instruments, etc., can solve the problems of uneven threshold voltage, uneven display brightness, affecting image display effect, etc., and achieve the effect of solving threshold voltage drift.

Inactive Publication Date: 2015-12-16
BOE TECH GRP CO LTD +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] Due to the process and device aging, in the original 2T1C driving circuit (including two thin film field effect transistors and a capacitor), there is non-uniformity in the threshold voltage of the driving TFT of each pixel, which leads to the The current of each pixel OLED changes to make the display brightness uneven, thus affecting the display effect of the entire image

Method used

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  • Pixel circuit and driving method therefor, array substrate, display panel and display device
  • Pixel circuit and driving method therefor, array substrate, display panel and display device
  • Pixel circuit and driving method therefor, array substrate, display panel and display device

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Embodiment Construction

[0023] The specific implementation manners of the present invention will be further described below in conjunction with the drawings and examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0024] An embodiment of the present invention provides a pixel circuit, such as figure 1 shown, including:

[0025] Five P-type switching transistors T1, T2, T3, T4, T5, one P-type driving transistor DT, one capacitor C, one electroluminescent unit L, and has multiple input terminals Reset, Init, Gate, Data and EM ;in,

[0026] The first pole of the first switching transistor T1, the first pole of the second switching transistor T2, the first pole of the driving transistor DT and the first pole of the fifth switching transistor T5 are all connected to the first node N1; The second pole, the gate of the drive transistor DT, and the first end of the capaci...

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Abstract

The invention provides a pixel circuit and a driving method therefor, an array substrate, a display panel and a display device. In the pixel circuit, the second pole of a first switch transistor, the first pole of a second switch transistor, the first pole of a driver transistor and the first pole of a fifth switch transistor are connected with a first node. The second pole of the second switch transistor, the grid electrode of the driver transistor and the first end of a capacitor are connected with a second node. The first pole of a third switch transistor, the second pole of a fourth switch transistor and the second end of the capacitor are connected with a third node. The second pole of the fifth switching transistor is connected with an electroluminescent part. According to the technical scheme of the pixel circuit, the working current flowing through the electroluminescent part is free from being influenced by the threshold voltage of the driver transistor. Therefore, the problem of the non-uniform display brightness due to the drift of the threshold voltage of the driver transistor can be completely solved.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit and a driving method thereof, an array substrate, a display panel and a display device. Background technique [0002] Organic Light-Emitting Diode (OLED) is one of the hotspots in the field of flat panel display research today. Compared with liquid crystal displays, OLED has the advantages of low energy consumption, low production cost, self-illumination, wide viewing angle and fast response speed. At present, OLEDs have begun to replace traditional liquid crystal (LCD) displays in display fields such as mobile phones, PDAs, and digital cameras. Pixel drive circuit design is the core technical content of OLED display, which has important research significance. [0003] Unlike TFT (Thin Film Field Effect Transistor)-LCD, which uses a stable voltage to control brightness, OLED is current-driven and requires a stable current to control light emission. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/3233G09G2300/0819G09G2310/0251G09G2310/061G09G2320/0233G09G2320/045G09G2330/02
Inventor 冯宇
Owner BOE TECH GRP CO LTD
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