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AMOLED pixel circuit

A pixel circuit and circuit technology, applied in the field of AMOLED pixel circuits, can solve the problems of unstable luminous brightness and uneven display, and achieve the effect of improving the display effect

Active Publication Date: 2015-04-15
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an AMOLED pixel circuit, which can correct the driving current entering the organic light-emitting diode in each pixel, and solve the problem of unstable luminance caused by changes in the characteristics of the organic light-emitting diode with time and temperature. and display unevenness

Method used

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Embodiment Construction

[0031] 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.

[0032] see figure 2 , the present invention provides an AMOLED pixel circuit, comprising:

[0033] The first thin film transistor T1, the gate of the first thin film transistor T1 is electrically connected to the scan line Scan, the source is electrically connected to the signal line Data, the drain is electrically connected to the source of the third thin film transistor T3, and One end of capacitor C;

[0034] The third thin film transistor T3, the gate of the third thin film transistor T3 is electrically connected to the control line Control, the source is electrically connected to the drain of the first thin film transistor T1, and the drain is electrically connected to the second thin film transistor T2 grid;

[0035] The second thin ...

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Abstract

The invention provides an AMOLED (active matrix organic light emitting diode) pixel circuit. A third thin film transistor (T3) is arranged between a first thin film transistor T1 and a second thin film transistor T2; opening and closing of the third thin film transistor (T3) are controlled by inputting a control signal through a control line (Control), so that the AMOLED pixel circuit carries out driving current measurement through a current measurement circuit (1) and signal voltage correction through a signal voltage driving circuit (2) or carries out normal displaying, so that driving current entering an organic light emitting diode (D) in each pixel can be corrected; the problems of unstable luminous brightness and non-uniform displaying which are caused by change of the characteristic of the light emitting diode (D) along with the time and the temperature are solved, and the display effect is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an AMOLED pixel circuit. Background technique [0002] The flat panel display device has many advantages such as thin body, power saving, and no radiation, and has been widely used. Existing flat panel display devices mainly include liquid crystal display devices (Liquid Crystal Display, LCD) and organic light emitting diode display devices (Organic Light Emitting Display, OLED). [0003] Organic light-emitting diode display devices have excellent characteristics such as self-illumination, no backlight, high contrast, thin thickness, wide viewing angle, fast response speed, flexible panels, wide operating temperature range, and relatively simple structure and manufacturing process. Known as the "dream display", it has been favored by major display manufacturers and has become the main force of the third-generation display devices in the field of display technology. [0004] Ac...

Claims

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Application Information

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IPC IPC(8): G09G3/32G09G3/3233
CPCG09G3/32G09G3/3233
Inventor 李文辉曾志远
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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