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

Pixel circuit and driving method thereof, electroluminescent display panel and display device

A technology of pixel circuit and potential, applied in the field of electroluminescence display panel and display device

Active Publication Date: 2017-11-17
WUHAN TIANMA MICRO ELECTRONICS CO LTD
View PDF8 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a pixel circuit, its driving method, an electroluminescence display panel and a display device, so as to solve the problems in the prior art of how to effectively improve the drift of the threshold voltage, eliminate afterimages, and improve the uniformity of the display screen

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
  • Pixel circuit and driving method thereof, electroluminescent display panel and display device
  • Pixel circuit and driving method thereof, electroluminescent display panel and display device
  • Pixel circuit and driving method thereof, electroluminescent display panel and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] Specific implementations of a pixel circuit, a driving method thereof, an electroluminescent display panel, and a display device provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. 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.

[0046] An embodiment of the present invention provides a pixel circuit, which may include: an initialization module, a data writing module, a light emission control module, a voltage storage module, a drive transistor, a first voltage maintenance module, a switch control module, an external compensation module, and a light emitting diode; in,

[0047] The driving tr...

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 a pixel circuit and a driving method thereof, an electroluminescent display panel and a display device. The pixel circuit comprises an initialization module, a data writing-in module, a light emitting control module, a voltage storage module, a driving transistor, a first voltage maintaining module, a switch control module, an external compensation module and a light-emitting diode. The driving transistor is a double-gate transistor; and a second gate of the double-gate transistor is electrically connected with the external compensation module through the switch control module. Under the control of the switch control module, the external compensation module collects the voltage of a third node and then provides a compensation voltage for a second node so as to realize adjustment of the threshold voltage of the dual-gate transistor, so that the threshold voltage of the dual-gate transistor is close to a standard threshold voltage and the current of the light-emitting diode during light emitting is be independent of the threshold voltage. Therefore, a phenomenon that the current is affected by the drift of the threshold voltage is avoided; and the residual image is eliminated to improve the quality of the displayed picture.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel circuit, a driving method thereof, an electroluminescence display panel and a display device. Background technique [0002] Organic Light Emitting Display (OLED) display is a current-driven display, so it needs a stable current to drive it to emit light; and due to the process and device aging, the threshold voltage of the drive transistor in the pixel circuit (V th ) is prone to drift, resulting in uneven display and afterimages. [0003] At present, in order to avoid the drift of the threshold voltage, there are generally two ways: one is to use the pixel circuit with internal compensation to compensate the threshold voltage of the driving transistor, and the other is to use an external compensation circuit to compensate the threshold voltage of the driving transistor in the pixel circuit. , to alleviate the problems of display unevenness and image retention. [000...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G2320/0257G09G3/2088G09G3/3233G09G2300/043G09G2300/0819G09G2300/0852G09G2300/0861G09G2320/043H01L29/78648H01L27/1214H10K59/1213H10K59/131H10K59/1216G09G3/3258G09G2320/045H01L27/124H01L27/1255
Inventor 朱仁远高娅娜李玥陈泽源
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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