AC (alternating current)-driven pixel circuit, driving method and display device

A pixel circuit and AC drive technology, which is applied in the field of display devices, can solve the problems of reduced luminous brightness, increased threshold voltage of light-emitting diodes, and reduced energy utilization efficiency, so as to eliminate the influence of display unevenness and avoid rapid aging effects

Active Publication Date: 2014-01-22
BOE TECH GRP CO LTD +1
View PDF7 Cites 34 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the prolongation of the use time, and with the prolongation of the OLED use time, a lot of unrecombined carriers accumulated at the internal interface of the light-emitting layer will cause a built-in electric field to form inside the OLED, resulting in a continuous increase in the threshold voltage of the light-emitting diode. The luminous brightness will continue to decrease, and the energy utilization efficiency will also gradually decrease.
The prior art proposes an OLED AC drive circuit. Although this circuit realizes the AC drive of OLED and solves the aging problem of OLED organic light-emitting diodes, it cannot improve the influence of internal resistance and drive transistor threshold on panel display non-uniformity.

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
  • AC (alternating current)-driven pixel circuit, driving method and display device
  • AC (alternating current)-driven pixel circuit, driving method and display device
  • AC (alternating current)-driven pixel circuit, driving method and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. .

[0051] The switching transistors and driving transistors used in all embodiments of the present invention can be thin film transistors or field effect transistors or other devices with the same characteristics. In addition, the transistors used in the embodiments of the present invention include P-type transistors and N-type transistors. , the P-type transistor is turned on when the gate is at a low level, and is turned off when the gate is at a high level. The N-type transistor is turned on when the gate is at a high level, and is turned off when the gate is at a low level. Inside can also be replaced by open or open, and cut-off can also be replaced b...

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 embodiment of the invention provides an AC (alternating current)-driven pixel circuit, a driving method and a display device, and relates to the field of display manufacturing. The rapid aging of an organic light emitting diode can be effectively avoided, and meanwhile, the influence of the internal resistance of the circuit on a light emitting current and the influence of the threshold voltage of a driving transistor on nonuniformity of panel display can be eliminated. The pixel circuit comprises a first capacitor, a second capacitor, a first voltage input unit, a second voltage input unit, a data signal input unit, a first light emitting unit and a second light emitting unit. The AC-driven pixel circuit, the driving method and the display device are applied to display manufacturing.

Description

technical field [0001] The invention relates to the field of display manufacturing, in particular to an AC-driven pixel circuit, a driving method and a display device. Background technique [0002] AMOLED (Active Matrix Organic Light Emitting Diode, active matrix organic light emitting diode panel) can emit light by driving TFT (Thin Film Transistor, Thin Film Field Effect Transistor), driven by the current generated in saturation state, because the input same gray scale When the voltage is high, different critical voltages will generate different driving currents, resulting in inconsistencies in the current. The uniformity of Vth (transistor threshold voltage) on the LTPS (Low Temperature Poly-silicon) process is very poor, and Vth also drifts, so the brightness uniformity of traditional 2T1C circuits has always been poor. Another reason that affects brightness uniformity is that due to the internal resistance of the circuit, and OLED is a current-driven light-emitting dev...

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): G09G3/32
CPCG09G3/3233G09G2300/0804G09G2300/0819G09G2300/0852G09G2300/0861G09G2310/0256G09G2320/043G09G2320/045G09G2330/028G09G3/32G09G3/3258G09G2300/0426
Inventor 青海刚祁小敬
Owner BOE TECH GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap