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Ferroelectric thin film transistor, organic light emitting array substrate driving circuit and display device

A technology of ferroelectric thin film and light-emitting array, which is applied in the direction of transistors, circuits, electrical components, etc., and can solve problems such as complex driving circuits

Active Publication Date: 2021-07-06
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be found that in the entire display area, each sub-pixel requires at least two thin film transistors and a storage capacitor for driving, which makes the driving circuit more complicated

Method used

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  • Ferroelectric thin film transistor, organic light emitting array substrate driving circuit and display device
  • Ferroelectric thin film transistor, organic light emitting array substrate driving circuit and display device
  • Ferroelectric thin film transistor, organic light emitting array substrate driving circuit and display device

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Embodiment Construction

[0039] 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 making creative efforts belong to the protection scope of the present invention.

[0040] Aiming at the problem in the prior art that each pixel unit requires at least two thin film transistors and a storage capacitor to drive, which makes the structure of the driving circuit of the pixel unit complicated, this application discloses a ferroelectric thin film transistor, an organic light emitting array substrate drive circuit and display device.

[0041] figure 2 For a schematic structural diagram of an OLED pixel drive circuit based on a s...

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Abstract

A ferroelectric thin film transistor, an organic light emitting array substrate driving circuit and a display device. The ferroelectric thin film transistor comprises: a substrate; a bottom electrode layer arranged on the substrate; a ferroelectric layer arranged on the side of the bottom electrode layer facing away from the substrate, and the material of the ferroelectric layer is a material with nonvolatile ferroelectric polarization; A semiconductor channel layer arranged on the side of the ferroelectric layer facing away from the substrate; a source electrode and a drain electrode arranged on the side of the semiconductor channel layer facing away from the substrate; the drain electrode is used to connect to the input end of the light-emitting element; the source electrode It is used for connecting with the power signal line; the bottom electrode layer is used for connecting with the control signal line; the driving circuit is simple. The polarization state of the ferroelectric layer is adjusted by applying a voltage to the bottom electrode layer, and then the concentration and resistance of carriers in the semiconductor channel layer are regulated through the polarization state of the ferroelectric layer, and the current flowing through the OLED is changed to realize OLED. Continuous modulation of serial voltage division and OLED display with different gray scales, the control method is simple.

Description

technical field [0001] The invention relates to the technical field of semiconductors and electronic circuits, in particular to a nonvolatile ferroelectric regulated ferroelectric thin film transistor, an organic light emitting array substrate drive circuit and a display device. Background technique [0002] Organic Light-Emitting Display (OLED) has been widely valued due to its characteristics such as self-illumination, wide viewing angle, high color gamut, high contrast ratio, and low power consumption. [0003] OLED display devices can be classified into two types according to their driving methods: Passive Matrix OLED (PMOLED) and Active Matrix OLED (AMOLED). Among them, AMOLED is an active display type, and is usually used as a high-definition display device. AMOLEDs are current driven devices. When a current flows through the organic light emitting diode, the diode emits light, and the brightness of the light is determined by the magnitude of the flowing current. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L29/78H01L29/786G09G3/3233
CPCG09G3/3233H01L29/78606H01L29/78391
Inventor 刘川川苏同上殷月伟李晓光
Owner UNIV OF SCI & TECH OF CHINA
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