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AMOLED pixel compensation driving circuit and method and display panel

A driving circuit and pixel technology, applied in static indicators, instruments, etc., can solve problems such as changes in driving current, uneven display of AMOLED display panels, etc.

Pending Publication Date: 2020-09-01
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to long-term operation, the threshold voltage Vth of the driving thin film transistor T20 will drift, which will cause the driving current of the organic light emitting diode OLED D100 to change, thereby causing the driving current of the organic light emitting diode OLED D100 to change, resulting in display failure of the AMOLED display panel. average problem
[0005] Since the traditional 2T1C pixel driving circuit structure does not have the function of compensating the threshold voltage Vth of the driving thin film transistor, it is necessary to introduce an appropriate compensation mechanism to achieve high-quality display

Method used

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  • AMOLED pixel compensation driving circuit and method and display panel
  • AMOLED pixel compensation driving circuit and method and display panel
  • AMOLED pixel compensation driving circuit and method and display panel

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Embodiment Construction

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0036] In all the embodiments of the present application, two electrodes other than the gate of the transistor are distinguished, one of which is called the source, and the other is called the drain. Since the source and drain of a transistor are symmetrical, its source and drain are interchangeable. According to the form in the accompanying drawings, it is stipulated that the middle terminal of the transistor is the gate, the signal input terminal is the source terminal, and th...

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Abstract

The invention provides an AMOLED pixel compensation driving circuit, an AMOLED pixel compensation driving method and a display panel. The AMOLED pixel compensation driving circuit adopts a 7T1C structure and comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, a storage capacitor and an organic light emitting diode, wherein the first transistor is a driving transistor. A preceding-stage scanning signal Sn-1, a current line scanning signal and a control signal are combined to sequentially act ata reset stage, a threshold voltage compensation stage and a light-emitting stage of the AMOLED pixel compensation drive circuit, thereby enabling a current flowing through the organic light emittingdiode to be irrelevant to a threshold voltage V-th of the first transistor T1. Therefore, the influence of drifting of the threshold voltage V-th of the first transistor on the current flowing throughthe organic light emitting diode can be eliminated, and the problems of non-uniformity and instability of TFT electrical characteristics of the display panel can be solved.

Description

technical field [0001] The embodiments of the present application relate to the field of display technology, and in particular to an AMOLED pixel compensation driving circuit, method and display panel. Background technique [0002] Organic light emitting diode display panel (OLED, Organic Light Emitting Display) has the advantages of self-illumination, low driving voltage, high luminous efficiency, bright color, high contrast, wide viewing angle, fast response speed, low power consumption, etc., and has become the most promising potential display panel. [0003] OLED display panels can be divided into passive matrix OLED (PMOLED, Passive MatrxiOLED) and active matrix OLED (AMOLED, Active Matrxi OLED) according to their driving methods. Among them, since the power consumption of AMOLED display panel is significantly smaller than that of PMOLED display panel, AMOLED The development of display panel technology is relatively extensive, and it is expected to replace liquid cryst...

Claims

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Application Information

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IPC IPC(8): G09G3/3233
CPCG09G3/3233
Inventor 夏浩
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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