Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

AMOLED pixel circuit and drive method

A technology of a pixel circuit and a driving method, applied in the field of flat panel display, can solve the problems of narrow threshold voltage adjustment range, reduced threshold voltage, false light emission of light-emitting devices, etc., and achieves the effects of high resolution, small size, and high aperture ratio

Active Publication Date: 2016-06-08
SOUTHEAST UNIV
View PDF8 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The circuit has a 3T1C structure, but there are the following problems: (1) The threshold voltage adjustment range of T1 is closely related to the polarity of the voltage applied to its gate, because the polarity of the voltage applied to one of the gates of T1 is always is positive (with supply voltage V DD Keep consistent) and cannot be negative, therefore, its threshold voltage adjustment range is narrow; (2) Apply a large positive voltage (such as V DD ) will cause the threshold voltage of T1 to decrease, or even make the threshold voltage of T1 less than zero, causing T1 to be in a normally-on state, which in turn will cause V in the circuit DD A path is formed between the ground and the ground, which will cause false lighting of the light emitting device

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • AMOLED pixel circuit and drive method
  • AMOLED pixel circuit and drive method
  • AMOLED pixel circuit and drive method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.

[0032] A kind of AMOLED pixel circuit, such as figure 2 As shown, it includes a first switching transistor T1, a second switching transistor T2, a driving tube T3, an organic light emitting diode OLED, a data line Vdata, a first scanning control line Vscan1, a second scanning control line Vscan2, a storage capacitor Cst, a program / erase In addition to the signal line Vpe, where:

[0033] The first switching transistor T1 is used to control the voltage on the data l...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an AMOLED pixel circuit and a drive method. The AMOLED pixel circuit comprises a first switch transistor (T1), a second switch transistor (T2), a driving transistor (T3), an organic light-emitting diode (OLED), a data line (Vdata), a first scanning control line (Vscan1), a second scanning control line (Vscan 2), a storage capacitor (Cst) and a programming and erasing signal line (Vpe). The drive method comprises a threshold voltage resetting stage, a threshold voltage compensating stage, a drive voltage writing-in stage and a light emitting stage. The AMOLED pixel circuit has the advantages of being simple in structure, easy to operate, small in size, high in opening rate, low in power consumption and the like and is suitable for high-resolution and large-size flat panel display.

Description

technical field [0001] The invention relates to an active matrix organic light emitting diode (Active-Matrix Organic Light Emitting Diode, AMOLED) pixel circuit and a driving method thereof, which belong to the technical field of flat panel display. Background technique [0002] Flat panel display (Flat Panel Display, FPD) is widely used in various electronic products such as TV, computer, tablet computer and smart phone, and plays a pivotal role in the electronic information industry. As an emerging representative of flat panel display, AMOLED display has the advantages of self-illumination, wide viewing angle, bright color, high contrast, wide operating temperature range (can still work at minus 40°C) and is suitable for flexible display. It has developed rapidly in recent years. [0003] The pixel circuit is the basic unit of flat panel display. A typical AMOLED pixel circuit consists of two thin film transistors (2T, T means Transistor), a storage capacitor (1C, C means ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G09G3/3225
CPCG09G3/3225
Inventor 黄晓东黄见秋
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com