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oled drive circuit and amoled display panel

A driving circuit and voltage technology, applied in static indicators, instruments, etc., can solve the problem of uneven OLED light emission, and achieve the effect of uniform OLED light emission, uniform brightness, and good image quality

Active Publication Date: 2019-08-30
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can improve the problem of uneven OLED light emission due to the drift of the threshold voltage of the driving thin film transistor and the voltage drop of the power supply voltage

Method used

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  • oled drive circuit and amoled display panel
  • oled drive circuit and amoled display panel
  • oled drive circuit and amoled display panel

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0034] The terms "comprising" and "having" and any variations thereof appearing in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, ...

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PUM

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Abstract

The embodiment of the present invention discloses an OLED driving circuit, including OLED, driving thin film transistor and switching thin film transistor; the first end of the switching thin film transistor receives data voltage, and the second end is electrically connected to the gate of the driving thin film transistor , the gate receives the nth scan signal, wherein n is an integer greater than or equal to 2, the first terminal of the driving thin film transistor receives the power supply voltage, the second terminal is electrically connected to the positive pole of the OLED, and the negative pole of the OLED Loading a low-level voltage; wherein, the OLED driving circuit also includes an elimination capacitor and an elimination thin film transistor, which are used to eliminate the OLED’s loss due to the drift of the threshold voltage of the driving thin film transistor and the voltage drop of the power supply voltage. change in drive current. The embodiment of the invention also discloses an AMOLED display panel. The invention solves the problem of non-uniform light emission of the OLED caused by the drift of the threshold voltage of the driving thin film transistor and the voltage drop of the power supply voltage.

Description

technical field [0001] The invention relates to the technical field of display driving, in particular to an OLED driving circuit and an AMOLED display panel. Background technique [0002] Organic Light-Emitting Diode (OLED) display panels are favored by people because of their thinness, energy saving, wide viewing angle, wide color gamut, and high contrast. Organic Light-Emitting Diode display panels are divided into passive OLEDs display panel (PMOLED) and active organic light emitting diode display panel (AMOLED). Among them, OLED drive circuits commonly used in AMOLED are as follows: figure 1 As shown, the OLED drive circuit is used to drive OLED, and the OLED drive circuit includes a switch thin film transistor (Switch TFT) T2, a drive thin film transistor (Driver TFT) T1 and a storage capacitor Cst, this structure is also called It is a 2T1C structure. The gate of the switching thin film transistor T2 receives the nth scan signal Scan(n), the drain of the switching t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3258
CPCG09G3/3258G09G2320/0233G09G2300/0819G09G3/3233G09G2300/0861G09G2300/0852G09G2320/045G09G2300/0426
Inventor 毛鹏
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD