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

A technology for driving circuits and driving tubes, applied in identification devices, static indicators, instruments, etc., can solve problems such as drift, poor threshold voltage Vth uniformity, and poor Vth uniformity, and achieve the effect of improving uniformity.

Active Publication Date: 2012-08-29
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, low temperature polysilicon (LTPS) technology is used to manufacture AMOLED drive circuits, and the threshold voltage Vth of TFTs manufactured by LTPS technology has poor uniformity and drift.
Due to the poor uniformity and drift of the threshold voltage Vth of the TFT, the driving current flowing through the OLED is uneven, thereby reducing the uniformity of the brightness of the AMOLED

Method used

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

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Embodiment Construction

[0052] In order for those skilled in the art to better understand the technical solution of the present invention, the AMOLED driving circuit, method and AMOLED display device provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0053] figure 1 A schematic structural diagram of an AMOLED drive circuit provided in Embodiment 1 of the present invention, as shown in figure 1 As shown, the AMOLED drive circuit includes: a light emitting device, a first switch tube T1, a voltage regulation module, a drive tube DTFT and a capacitor Cs. In this embodiment, the light emitting device may be an OLED. The gate of the first switching tube T1 is connected to the first control line, the first pole of the first switching tube T1 is connected to the data line, the second pole of the first switching tube T1 is connected to the voltage regulating module; the first pole of the driving tube DTFT The pole is connected to the voltage r...

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Abstract

The invention discloses an AMOLED (Active Matrix/Organic Light Emitting Diode) driving circuit and method, and an AMOLED display. The AMOLED driving circuit is characterized in that the AMOLED driving circuit comprises a light emitting device, a first switching tube, a voltage regulating module, a driving tube and a capacitor. According to the AMOLED driving circuit, the light emitting device is driven by the driving tube under the control of the voltage regulating module, and the driving current provided by the driving tube is unrelated to Vth (threshold voltage) of the driving tube. Therefore, the driving current which flows through the light emitting device is not affected by poor uniformity and shift of the Vth, and the uniformity of the driving current which flows through the light emitting device is increased, thereby increasing the uniformity of the AMOLED brightness.

Description

technical field [0001] The present invention relates to display technology, in particular to an AMOLED driving circuit, method and AMOLED display device. Background technique [0002] With the development of display technology, the application of Active Matrix / Organic Light Emitting Diode (AMOLED for short), which is called the next generation display technology, is becoming more and more important. The light-emitting device of the AMOLED is an organic light-emitting diode (Organic Light-Emitting Diode, hereinafter referred to as OLED), driven by the AMOLED driving circuit, when a current flows through the light-emitting device OLED, the OLED emits light. [0003] At present, the AMOLED driving circuit generally adopts a traditional 2T1C circuit, and the 2T1C circuit includes two thin film transistors (Thin Film Transistor, TFT for short) and one capacitor. Generally, low temperature polysilicon (Low Temperature Poly-silicon, LTPS for short) technology is used to manufactur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09F9/33
CPCG09G3/3233G09G2300/0819G09G2300/0842G09G2300/0861G09G2310/0251G09G2310/0262G09G2320/045
Inventor 吴博谭文祁小敬
Owner BOE TECH GRP CO LTD
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