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

A luminescence and diode technology, which is applied in the field of data signal timing control and frame-by-frame display, can solve problems such as data timing changes, and achieve the effect of improving brightness stability

Inactive Publication Date: 2008-07-23
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0004] In order to overcome the shortcomings of the organic electroluminescent diode display active drive in the above-mentioned prior art, the present invention still uses dual-tube TFT drive in the active drive, but the data timing is changed after processing

Method used

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

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Embodiment Construction

[0015] Image 6 It is a circuit block diagram for realizing signal timing change and control 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 is obtained by adjusting the frequency, amplitude and offset of the function generator Signal data timing signal A and pixel data timing signal B waveforms of the present invention.

[0016] exist Image 6 Among them, the clock signal of the gate line control circuit of the display screen is recorded by the counter, and when the first frame of the gate clock signal is recorded, the counter sends an instruction to the analog switch to convert the data timing signal into the original pixel signal The signal with the opposite voltage becomes the second frame data signal. Similarly, when the counter records the gate clock sig...

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Abstract

The present invention changes transmitted 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 even number frame does not transmit said pixel signal, but converted into one opposite voltage signal, termination tube even number 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 frame reverse voltage signal between data signal frame and frame, 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 timing control of data signals, specifically frame-to-frame display, that is, a reverse voltage is added between pixel frames and frame data to suppress transistor threshold drift and achieve control of 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 light weight, thin thickness, self-luminescence, high brightness, high contrast, wide viewing angle 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 ligh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32G09G5/10H05B33/08G09G3/3208H05B44/00
Inventor 廖燕平邵喜斌张志伟付国柱荆海马凯
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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