Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Amoled pixel driving circuit and its driving method

A pixel driving circuit and potential technology, applied in static indicators, instruments, etc., can solve the problems of low effective light-emitting area of ​​pixels, large number of scanning control signals, and complex timing controllers, so as to increase the effective light-emitting area and improve the display. effect, current stabilization effect

Active Publication Date: 2019-09-24
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] like figure 1 As shown, an AMOLED pixel driving circuit with a 7T2C structure includes 7 thin film transistors and 2 capacitors, which are respectively: a first thin film transistor T10, a second thin film transistor T20, a third thin film transistor T30, a fourth thin film transistor T40, The fifth thin film transistor T50, the sixth thin film transistor T60, the seventh thin film transistor T70, the first capacitor C10, and the second capacitor C20, the pixel drive circuit needs to be controlled by four scan control signals, which are the first scan control signal S10, The second scan control signal S20, the third scan control signal S30, and the fourth scan control signal S40; the working timing diagram of the circuit is as follows figure 2 As shown, the working process of the circuit includes: a first stage 10, a second stage 20, and a third stage 30, wherein in the second stage 20, the second scanning control signal S20 first provides a high potential and then provides a low potential, and this When the second scanning control signal S20 provides a low potential, due to the effect of the first capacitor C1, the potential at the connection point between the first capacitor C1 and the second capacitor C2 will be unstable, and the pixel driving circuit needs 7 One thin film transistor and two capacitors, the structure is complex, the effective light-emitting area of ​​the pixel is low, and the number of scanning control signals is large, which makes the timing controller more complicated

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 driving circuit and its driving method
  • Amoled pixel driving circuit and its driving method
  • Amoled pixel driving circuit and its driving method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

[0049] see image 3 , the present invention provides an AMOLED pixel drive circuit, comprising: a first thin film transistor T1, a second thin film transistor T2, a third thin film transistor T3, a fourth thin film transistor T4, a fifth thin film transistor T5, a sixth thin film transistor T6, a capacitor C1, and organic light emitting diode D;

[0050] The gate of the first thin film transistor T1 is connected to the second scanning control signal S2, the source is electrically connected to the data signal Data, and the drain is electrically connected to the first node A;

[0051] The gate of the second thin film transistor T2 is connected to the third scanning control signal S3, the source is electrically connected to the first node A, and...

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 present invention provides an AMOLED pixel driving circuit and its driving method, which adopts a 6T1C pixel driving circuit with a specific driving sequence, can effectively compensate the threshold voltage of the driving thin film transistor, and stabilize the current flowing through the organic light emitting diode , to ensure uniform luminance of organic light-emitting diodes, improve the display effect of the picture, and reduce the number of thin-film transistors and scanning control signals through the combination of N-type thin-film transistors and P-type thin-film transistors, thereby simplifying the structure of the pixel driving circuit and increasing the effective Luminous area.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an AMOLED pixel driving circuit and a driving method thereof. Background technique [0002] Organic light emitting diode (Organic Light Emitting Display, OLED) display device has self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide operating temperature range, and can realize flexible display and With many advantages such as large-area full-color display, it is recognized by the industry as a display device with the most potential for development. [0003] OLED display devices can be divided into passive matrix OLED (Passive Matrix OLED, PMOLED) and active matrix OLED (Active Matrix OLED, AMOLED) two categories according to the driving method, namely direct addressing and thin film transistor (Thin Film Transistor, TFT) matrix addressing two types. Among them, AMOLED has pixels arra...

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 Patents(China)
IPC IPC(8): G09G3/3233G09G3/3266
CPCG09G3/3233G09G3/3266G09G2320/0233G09G2300/0819G09G2300/0852G09G2300/0861G09G2310/0251G09G2310/0262G09G2310/08G09G2320/043G09G2320/045
Inventor 王珊温亦谦
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH 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
Eureka Blog
Learn More
PatSnap group products