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Method for improving a-Si-TFT orgnaic electro LED lightness stability

An electroluminescence and diode technology, which is applied in the fields of interlaced display and new data signal timing control, can solve problems such as reducing the aperture ratio of pixels, and achieve the effect of improving brightness stability.

Inactive Publication Date: 2006-10-25
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the four-tube TFT driving scheme solves the problem of brightness uniformity well, it inevitably reduces the pixel aperture ratio.

Method used

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  • Method for improving a-Si-TFT orgnaic electro LED lightness stability
  • Method for improving a-Si-TFT orgnaic electro LED lightness stability
  • Method for improving a-Si-TFT orgnaic electro LED lightness stability

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Embodiment Construction

[0015] Image 6 It is a circuit block diagram for realizing the sequence change and control of the column signal in a specific embodiment of the present invention. exist Figure 7 In the specific embodiment, the original pixel data timing signal A and the pixel data timing signal B of the present invention are all output by the function generator, and the original pixel data signal A and The pixel data timing signal B waveform of the present invention.

[0016] exist Image 6 Among them, the clock signal and frame number of the gate line control circuit of the display screen are respectively recorded by counter 1 and counter 2. When the number of frames recorded by counter 2 is odd and the number of clocks recorded by counter 1 is odd, counter 1 converts to analog The switch issues an instruction to convert it into a voltage opposite to the data signal, which becomes the column data signal of the current row. Similarly, when the number of frames recorded by counter 2 is an...

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Abstract

The present invention changes transmitted row data signal time sequence, transmitting original certain pixel data time sequence to termination tube TFT gate through switching tube, termination tube TFT gate signal waveform capable of making termination tube TFT threshold upwards monotone drift (enlargement), reducing flow current. Above-mentioned pixel adjacent line does not transmit said pixel signal, but converted into one opposite voltage signal, termination tube TFT separate frame negative waveform making its threshold down monotone drift (reducing), i.e. in each two frames making threshold suppressed at initial value. The present invention increases a row reverse voltage signal between line and line data signal, capable of making termination tube TFT gate voltage becoming positive and negative alternant signal, i.e. capable of suppressing its threshold monotone variation, making termination tube TFT current stabilization, to realize organic electroluminescent diode reaching luminescence steady requirement.

Description

technical field [0001] The invention belongs to the field of display technology, and relates to a new data signal timing control, specifically interlaced display, that is, a reverse voltage is added between the row and row data of the pixel to suppress the threshold drift of the transistor, so as to control the organic electrical A method for stabilizing the luminance of light-emitting diodes. technical background [0002] Organic light-emitting diode (OLED) display is currently a research hotspot in the field of display due to its advantages of thinness and lightness, high contrast, wide viewing angle, high brightness, full color and fast response. There are two driving methods for OLED display, passive driving and active driving. Passive drivers cannot overcome the phenomenon of crosstalk when large size and high resolution are required, so they cannot be popularized when large size and high definition are required. Active driving is well applied in driving organic light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3233G09G5/10H05B44/00
Inventor 张志伟廖燕平邵喜斌付国柱荆海刘少林
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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