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

OELD pixel circuit, display device and control method

A pixel circuit and voltage value technology, applied to static indicators, instruments, etc., can solve the problems of restricted and inflexible data signal design, and achieve the effects of improving flexibility, ensuring normal operation, and ensuring conduction

Active Publication Date: 2015-06-10
BOE TECH GRP CO LTD
View PDF7 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the driving circuit in the prior art has the disadvantage that the design of the data signal is limited by the power supply, and it is inflexible.

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
  • OELD pixel circuit, display device and control method
  • OELD pixel circuit, display device and control method
  • OELD pixel circuit, display device and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] The purpose of the embodiments of the present invention is to provide an OELD pixel circuit and a display device, using an additionally designed charging signal whose voltage value is greater than the actual voltage value of the data signal to charge the capacitor, instead of the existing power supply used as the charging signal signal, which avoids the design restriction of the power signal on the data signal, improves the flexibility of designing OLED pixel circuits, and improves the reliability of threshold voltage compensation at the same time.

[0057] In the process of realizing the embodiment of the present invention, the inventor, through creative work, found that the driving circuit of the OLED pixel in the prior art has mutual constraints between the power signal and the data signal, which leads to the limitation in the design of the driving circuit of the OLED pixel More, and the problem of unreliable threshold voltage compensation, which is described in detai...

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 OELD pixel circuit, a display device and a control method. The OELD pixel circuit comprises an organic light emitting diode, a driving transistor, a first switch unit, a second switch unit and a compensation unit for a capacitor structure, and wherein a drain electrode is connected with the organic light emitting diode; the first switch unit is used for outputting a power source signal to a source electrode of the driving transistor in a light emitting stage; the second switch unit is used for outputting a data signal to a grid electrode of the driving transistor in a current scanning stage; the OELD pixel circuit further comprises a charging control unit, the charging control unit is used for outputting a charging signal to the capacitor structure in a charging stage, charging for the capacitor structure and enabling the capacitor structure to maintain a grid voltage of the driving transistor in the light emitting stage, and the voltage value of the charging signal is larger than the actual voltage value of the data signal. The OELD pixel circuit, the display device and the control method improve design flexibility of a driving circuit, and the normal conduct of threshold voltage compensation is guaranteed.

Description

technical field [0001] The invention relates to display technology, in particular to an OELD pixel circuit, a display device and a control method. Background technique [0002] As far as display devices are concerned, organic light-emitting diodes (Organic Light-Emitting Diode, OLED) have the advantages of self-illumination, high contrast, wide color gamut, etc., and also have the advantages of simple preparation process, low power consumption, and easy realization of flexible display. , becoming an important light-emitting element in emerging flat panel display devices. [0003] In the pixel structure of the OLED display panel, each sub-pixel includes a driving transistor. In the OLED pixel circuit, the current flowing through the OLED is not only controlled by the data signal Vdata, but also affected by the threshold voltage Vth of the driving transistor. [0004] Due to differences in the threshold voltage and mobility of TFTs in multiple pixel circuits, it is impossibl...

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): G09G3/32G09G3/3208
CPCG09G2300/0819G09G2320/045G09G3/3233G09G2300/0842G09G2320/0233G09G3/3266
Inventor 孙亮
Owner BOE TECH GRP 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