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OLED driving circuit and AMOLED display panel

A driving circuit and voltage technology, used in static indicators, instruments, etc., can solve the problem of uneven OLED light emission, and achieve the effect of uniform light emission, uniform light emission brightness, and stable driving current of OLED

Active Publication Date: 2018-03-02
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 driving circuit and AMOLED display panel
  • OLED driving circuit and AMOLED display panel
  • OLED driving 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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Abstract

The embodiment of the invention discloses an OLED driving circuit including an OLED, a driving thin-film transistor (TFT) and a switching TFT. The first end of the switching TFT receives data voltage.The second end of the switching TFT is electrically connected to the gate of the driving TFT. The gate of the switching TFT receives an n-th stage scan signal, wherein n is an integer greater than orequal to 2. The first end of the driving TFT receives supply voltage. The second end of the driving TFT is electrically connected to the anode of the OLED. Low-level voltage is applied to the cathodeof the OLED. The OLED driving circuit further includes an elimination capacitor and an elimination TFT for eliminating the change of the driving current of the OLED caused by the drift of the threshold voltage of the driving TFT and the voltage drop of the supply voltage. The embodiment of the invention further discloses an AMOLED display panel. The OLED driving circuit solves the uneven light emission of the OLED caused by the shift of the threshold voltage of the driving TFT and the voltage drop of the 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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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
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