AMOLED (Active Matrix/Organic Light Emitting Diode) pixel driving circuit and pixel driving method

A pixel driving circuit and polar electricity technology, applied in static indicators, instruments, etc., can solve the problems of power consumption and affecting the display effect of the screen, so as to reduce power consumption, avoid unnecessary light emission, and improve the display effect

Active Publication Date: 2015-05-20
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology

[0012] The purpose of the present invention is also to provide a driving method for AMOLED pixels, which can solve the problems of unnecessary light emission of organic light-emitting diodes, power consumption and affecting the display effect of the picture while compensating the threshold voltage of the driving thin film transistor

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  • AMOLED (Active Matrix/Organic Light Emitting Diode) pixel driving circuit and pixel driving method
  • AMOLED (Active Matrix/Organic Light Emitting Diode) pixel driving circuit and pixel driving method
  • AMOLED (Active Matrix/Organic Light Emitting Diode) pixel driving circuit and pixel driving method

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Embodiment Construction

[0067] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

[0068] see Figure 7 , the present invention provides an AMOLED pixel drive circuit, the AMOLED pixel drive circuit is a 5T1C structure, including: a first thin film transistor T1, a second thin film transistor T2, a third thin film transistor T3, a fourth thin film transistor T4, a fifth thin film transistor T5, capacitor C1, and organic light emitting diode D1. The gate of the first thin film transistor T1 is electrically connected to the gate of the second thin film transistor T2 through the first node A, the drain is electrically connected to the drain of the fifth thin film transistor T5, and the source is electrically connected to the organic the anode of the light-emitting diode D1; the gate of the second thin film transistor T2 is ele...

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Abstract

The invention provides an AMOLED (Active Matrix / Organic Light Emitting Diode) pixel driving circuit and a pixel driving method. The AMOLED pixel driving circuit comprises first, second, third, fourth and fifth thin film transistors (T1, T2, T3, T4 and T5), a capacitor (C1) and an organic light-emitting diode (D1), wherein the first and second thin film transistors (T1 and T2) are arranged symmetrically, are equal in threshold voltages, and can be used for compensating for the threshold voltages of driving thin film transistors; the fifth thin film transistor (T5) is arranged between a power voltage (Vdd) and the first thin film transistor (T1), namely, a driving transistor; the fifth thin film transistor (T5) is controlled to be switched on only at a driving stage (3) through a third scanning control signal (S3) according to a time sequence, so that the organic light emitting diode (D1) is controlled to only shine at the driving stage (3), unnecessary light emission of the organic light-emitting diode (D1) can be avoided, the power consumption is lowered, and the display effect of a picture is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an AMOLED pixel driving circuit and a pixel driving method. Background technique [0002] Organic light emitting diode (Organic Light Emitting Display, OLED) display device has self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide operating temperature range, and can realize flexible display and With many advantages such as large-area full-color display, it is recognized by the industry as a display device with the most potential for development. OLED display devices can be divided into passive matrix OLED (Passive Matrix OLED, PMOLED) and active matrix OLED (Active Matrix OLED, AMOLED) two categories according to the driving method, namely direct addressing and thin film transistor (Thin Film Transistor, TFT) matrix addressing two types. Among them, AMOLED has pixels arranged in an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3258
CPCG09G3/3233G09G2300/0861G09G2310/0251G09G2310/0262G09G2320/043G09G2300/0819G09G3/3258G09G3/3291G09G2300/0426G09G2300/043G09G2320/0233G09G2330/021
Inventor 吴小玲
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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