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Pixel compensating circuit of active matrix organic light emitting diode displayer

A light-emitting diode and compensation circuit technology, which is applied in the field of pixel compensation circuits, can solve problems such as uneven brightness, and achieve the effects of improving uneven brightness, maintaining current output, and stabilizing current output

Inactive Publication Date: 2015-03-25
AU OPTRONICS CORP
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the defect of uneven brightness in the pixel compensation circuit of the active matrix organic light emitting diode display in the prior art when displaying pictures, the present invention provides a pixel compensation circuit of the active matrix organic light emitting diode display

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  • Pixel compensating circuit of active matrix organic light emitting diode displayer
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  • Pixel compensating circuit of active matrix organic light emitting diode displayer

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Embodiment Construction

[0034] In order to make the technical content disclosed in this application more detailed and complete, reference may be made to the drawings and the following various specific embodiments of the present invention, and the same symbols in the drawings represent the same or similar components. However, those skilled in the art should understand that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for schematic illustration and are not drawn according to their original scale.

[0035] As mentioned above, due to the influence of the manufacturing process of thin-film transistors, the threshold voltage will drift to different degrees. Even if the same driving voltage signal is provided, the light-emitting current flowing through the organic light-emitting diode is likely to be different, which often causes the display screen to fluctuate. Brightness is uneven. This is because, when a thin film transistor...

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Abstract

The invention provides a pixel compensating circuit of an active matrix organic light emitting diode displayer. The pixel compensating circuit comprises a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a memory capacitor and an organic light emitting diode, wherein the control end of the first switch receives a light emitting pulse signal, the first end of the first switch is electrically coupled with reference voltage, the control end of the second switch receives a second scanning signal, the second end of the second switch is electrically coupled with data voltage, the control end of the third switch receives a first scanning signal, the first end of the fourth switch is electrically coupled with first voltage, the control end of the fifth switch receives the second scanning signal, the control end of the sixth switch receives the light emitting pulse signal, and the memory capacitor is connected between the first end and the second end of the third switch in a crossover mode. Compared with the prior art, the pixel compensating circuit has the advantages that a compensation operation is carried out before the lightening period, the voltage potential of the control end of the fourth switch is increased from the data voltage to the difference value between the first voltage and threshold voltage, a light emitting current is not influenced by threshold voltage shift, stable current output is maintained, and nonuniform luminance of display pictures is improved.

Description

technical field [0001] The invention relates to an active matrix organic light emitting diode display, in particular to a pixel compensation circuit of the active matrix organic light emitting diode display. Background technique [0002] In recent years, conventional displays have been gradually replaced by portable thin flat panel displays. Self-illuminating displays such as organic or inorganic light emitting displays have more advantages than other flat panel displays because organic or inorganic light emitting displays can provide a wide viewing angle, good contrast ratio, and have a fast response speed. In this way, organic or inorganic light-emitting displays have attracted people's attention as next-generation displays, especially organic light-emitting diode (Organic Light Emitting Diode, OLED) displays that include a light-emitting layer formed by organic materials. Phosphoric light-emitting displays have higher brightness, lower driving voltage and faster response...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3233
Inventor 黄冠儒叶佳元林永铭
Owner AU OPTRONICS CORP
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