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

Pixel drive circuit and driving method thereof, and organic light-emitting display panel

A pixel drive circuit and pixel technology, which is applied in the field of pixel drive circuits and organic light-emitting display panels, can solve problems such as flickering, affecting the brightness of OLED light, and failure to ensure lossless conduction or complete cut-off.

Active Publication Date: 2017-07-07
BOE TECH GRP CO LTD +1
View PDF6 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the switch transistor cannot be turned on or completely turned off without loss, so leakage current will occur when the switch transistor cannot be completely turned off, and a leakage current path will be formed, causing part of the current used for OLED light to flow through the initialization transistor to the initialization In the signal path, thus affecting the luminous brightness of the OLED, and causing flickering phenomenon

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 drive circuit and driving method thereof, and organic light-emitting display panel
  • Pixel drive circuit and driving method thereof, and organic light-emitting display panel
  • Pixel drive circuit and driving method thereof, and organic light-emitting display panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] like Figure 3a The pixel drive circuit shown, its corresponding input timing diagram is as follows Figure 5a shown. Specifically, choose the Figure 5a There are three stages in the input timing diagram shown: an initialization stage T1, a data writing stage T2, and a light emitting stage T3. in, Figure 5a Among them, Vg(M0) represents the gate voltage of the initialization transistor M0, and the voltage V of the high potential of the leakage control signal terminal CK ck Take the high potential voltage equal to the reset signal terminal Reset as an example.

[0102] In the initialization phase T1, Reset=0, Scan=1, EM=1, CK=0.

[0103] Since Reset=0, both the first switch transistor M1 and the third switch transistor M3 are turned on. Since Scan=1, both the second switch transistor M2 and the fourth switch transistor M4 are turned off. Since EM=1, both the fifth switch transistor M5 and the sixth switch transistor M6 are turned off. The turned-on first switch...

Embodiment 2

[0112] like Figure 4a The pixel drive circuit shown, its corresponding input timing diagram is as follows Figure 5b shown. Specifically, choose the Figure 5b There are three stages in the input timing diagram shown: an initialization stage T1, a data writing stage T2, and a light emitting stage T3. in, Figure 5b Among them, Vg(M0) represents the gate voltage of the initialization transistor M0, and the voltage V of the low potential of the leakage control signal terminal CK ck Take the low potential voltage equal to the reset signal terminal Reset as an example.

[0113] In the initialization phase T1, Reset=1, Scan=0, EM=0, CK=1.

[0114] Since Reset=1, both the first switch transistor M1 and the third switch transistor M3 are turned on. Since Scan=0, both the second switch transistor M2 and the fourth switch transistor M4 are turned off. Since EM=0, both the fifth switch transistor M5 and the sixth switch transistor M6 are turned off. The turned-on first switch t...

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 drive circuit and a driving method thereof, and an organic light-emitting display panel. The pixel drive circuit comprises a light-emitting device, a pixel compensation circuit connected with the light-emitting device, a signal input module, and a leakage suppression module. A reset signal terminal is connected with a control electrode of an initialized transistor by the signal input module. The signal input module is used for providing a signal of the reset signal terminal for the control electrode of the initialized transistor under control of the reset signal terminal; and the leakage suppression module is used for increasing a voltage difference between the control electrode of the initialized transistor and a second electrode of the initialized transistor under control of a leakage control signal terminal. On the basis of mutual cooperation of the modules, the signal inputted into an initialized signal terminal by the initialized transistor can be controlled; and the initialized transistor enters a cut-off state by increasing the voltage difference between the control electrode and the second electrode of the initialized transistor. Therefore, formation of a leakage current path of the initialized transistor can be avoided; the brightness of the light-emitting device can be improved; and the scintillation phenomenon can be improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel driving circuit, a driving method thereof and an organic light-emitting display panel. Background technique [0002] Organic Light Emitting Diode (OLED) is one of the hot spots in the field of flat panel display research today. Compared with Liquid Crystal Display (LCD), OLED display has low energy consumption, low production cost, self-illumination, and wide viewing angle. and quick response. At present, OLED displays have begun to replace traditional LCD displays in display fields such as mobile phones, tablet computers, and digital cameras. However, unlike LCDs that use a stable voltage to control brightness, OLEDs are driven by current and require a stable current to control their light emission. Due to the process and device aging, OLED displays generally use threshold voltage V th Functional pixel compensation circuit to drive OLED to emit light. [0003] At pr...

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): G09G3/3225
CPCG09G3/3225G09G3/325G09G2300/0814G09G2300/0819G09G2300/0852G09G2300/0861G09G2310/08G09G2320/0247G09G3/3266
Inventor 王鑫刘颖
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