最新刊期
期 7 ， 2017
- 摘要：
When we proceed pressure test on TFT-LCD(Thin Film Transistor-Liquid Crystal Display) panels with high resolution, "spot issue" always occurs. PS(Photo Spacer) slides from Gate metal line to transparent area and scratches PI(Polyimide) film, so that LC(Liquid Crystal) molecules can't be anchored. At Dark Picture, place where PI film is damaged occur light-leaking, and forms "spot issue". In order to prevent this issue, we carried out pressure test on TFT-LCD panels with different size and resolution and compared the designs of Photo Spacer, Barriers, BM CD(Black Matrix Critical Dimension) and PS standing Position. We find that the sliding distance of PS can effectively reduce 23.6% by PS Barriers, so light-leaking risk effectively decrease. When PS sliding distance is not beyond the scope of BM(Black Matrix), "spot issue" is not invisible or very slight. The sliding distance of PS standing on the Pillow made by metal block is smaller than that without standing on the Pillow about 10%. At last, taking an example of 49 UHD(Ultra High Definition), we put forward an effective prevention of "spot issue" design of LCD: Increasing the PS Barriers design to reduce the sliding distance of PS; Increasing the width of BM CD make sure the distance from PS edge to BM edge being greater than PS sliding distance; Reducing the number of PS and increasing the size of the PS design reduce the transmittance loss. The results of client authentication do not occur "spot issue" and transmittance fell by 1.2%, which shows that this design scheme can effectively improve the "spot issue".
关键词：TFT-LCD;Spot Issue;Black Matrix;Photo Spacer- 46
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发布时间：2020-08-12
- 摘要：
When we proceed pressure test on TFT-LCD(Thin Film Transistor-Liquid Crystal Display) panels with high resolution, "spot issue" always occurs. PS(Photo Spacer) slides from Gate metal line to transparent area and scratches PI(Polyimide) film, so that LC(Liquid Crystal) molecules can't be anchored. At Dark Picture, place where PI film is damaged occur light-leaking, and forms "spot issue". In order to prevent this issue, we carried out pressure test on TFT-LCD panels with different size and resolution and com 关键词：TFT-LCD;Spot Issue;Black Matrix;Photo Spacer- 192
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发布时间：2020-08-12 - 摘要：Polymer-stabilized blue-phase liquid crystal display (PSBP LCD) driven by conventional in-plane -switching (IPS) electrodes suffers from low transmittance due to the existence of dead zones. A floating electrode is introduced to enhance the lateral electric field on dead zone areas, so as to improve the peak transmittance of BP LCD device. The electro-optical properties of floating electrode enhanced protrusive IPS blue-phase LCD is analyzed by Techwiz3D simulation. The impact of electrode dimension, operation wavelength and misalignment of floating electrodes is investigated quantitatively. Our simulation results indicate that floating electrode increases the transmittance by 15% and the overall transmittance reaches ~90% for all three visible wavelengths (450 nm, 550 nm, 650 nm) employed for display applications. This makes blue-phase LCD a more competitive candidate for next generation display technology.关键词：floating electrode;blue phase liquid crystal;protrusion electrode;high transmittance
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发布时间：2020-08-12 - 摘要：
Full-in-cell (FIC) product signal line SD-layer is Mo-Al-Mo structure, when using Reactive Ion Etching (RIE) mode dry etching device for N + etching, the chlorine compounds absorbed on the side wall surface of the Al and photoresist line, when the glass substrate is etched away from the chamber exposed to air, the moisture encountered hydrolysis reaction, which will cause corrosion of Al wire and seriously affect the product characteristics. In this paper, the Al etching phenomenon is improved by changing t 关键词：aluminum corrosion;TFT channel;TFT characteristics;channel thickness- 83
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发布时间：2020-08-12 - 摘要：At present, some of the BOE products always had the problems of gravity Mura and cold气泡. In this paper, the causes of these problems were analyzed. Also, the method of PS height measurement, the interaction relation between PS height and the amount of liquid crystal were analyzed and experimentally verified. We found that the current method of PS height measurement didn't consider the influence of RGB process variation. In this paper, the influence of RGB process variation was considered in the new measurement method of PS height.At the same time, the linkage between PS height and LC amount was proposed based on the evaluation result of LC Margin and the PS deformation result. We solved the problem that the LC amount during the process of actual mass production was different from the center of appropriate LC Margin. In this way, the problems such as gravity Mura and cold bubble were avoided. Also, the margin of process control had been expanded 3%.关键词：LC Margin;PS Height;LC Amount
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发布时间：2020-08-12 - 摘要：Based on analyzing grayscale method of time-division, a scaling method, in which either frame is binary weighted by the voltage-parameter or the duration of sub-frames are equal, has been proposed for helping lower frequency of the pixel-clock and removing the flicker appearing with method of time-division. In this paper, each frame has been divided into n-sub-frames corresponding to the n-bit image data. The grayscale of pixel is controlled by the binary weight of the level of driving voltage.关键词：scaling method;binary weight;electrical-parameter;LCOS
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发布时间：2020-08-12 - 摘要：
By counting and locating anisotropic conductive film (ACF) particles in the circuit of thin film transistor liquid crystal display (TFT-LCD), it can determine the circuit's conductivity. In order to solve the overlap problem caused by density increasing of particles in narrow bezel, we put forward a algorithm based on differential interference contrast (DIC) imaging, the algorithm integrates mask method and k-means clustering detection algorithm. After separating particles of bright and shadow, we can effec 关键词：anisotropic conductive film;particle overlap;k-means;image entropy;convexity- 83
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发布时间：2020-08-12 - 摘要：
Recently, ensemble classifier is predominantly used for steganalysis of digital media. For increasing the detection accuracy of ensemble classifier and focused on the defects that the fusion method of ensemble classifier is too simple to reflect the correlation of base learners and can't give an overall result, an algorithm based on Bayesian Classifier is proposed according to a characteristic that the projection of feature on the hyper planes of ensemble classifier obeys the framework of the multivariate G 关键词：steganalysis;ensemble classifier;fusion technique;multivariate Gaussian distribution;Bayesian classifier- 33
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发布时间：2020-08-12 - 摘要：
In order to study on new hologram storage material, we introduced a TMPTA-based photopolymer in this article. We have successfully recorded three-dimensional (3D) object information and digital parallax stereogram image, etc. in this polymer film; it is shown that the polymer has a good performance in holographic recording and reconstruction. Experimental results show that a diffraction efficiency nearly 90% can be achieved when the recording angle is set to be 26° without voltage applied. As a holographic 关键词：holography;diffractive optics;photopolymers;nonlinear optical materials;hologram storage- 56
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发布时间：2020-08-12 - 摘要：
Active-matrix organic light emitting diode (AMOLED) has the advantages of low power, wide view-angle, good flexibility and so on. It is regarded as the key of the next generation display technology. Generally, the sub-pixel arrangement of AMOLED is RGBG, which does not match with the RGB arrangement of image. In order to realize image display, the research of RGB-to-RGBG is urgent. In this paper, an RGB-to-RGBG conversion algorithm based on weighting factor (BWF) has been proposed, and related integrated ci 关键词：AMOLED;RGBG;weighting factor;conversion algorithm- 106
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发布时间：2020-08-12
MaterialScience
- 摘要：
The 16 kinds of Liquid crystalline (LC) compounds, with the structures of lateral fluoro-substituted benzopyran structures or naphthol (phenol), and CH2O moiety as a linkage group, were analyzed by GCMS. The results show that the spectra of the two kinds of compounds have obvious characteristics. The cleavage pathway was similar for the two kinds of compounds, which is that the ether bond connected to the β-hydrogen through the four-membered ring transition state rearrangement of neutral molecules, to obtai 关键词：liquid crystals;GC/MS;fragmentation mechanism- 94
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发布时间：2020-08-12 - 摘要：
In order to optimize etching process of silicon nitride (SiNx), the enhanced capacitive coupled plasma etching (ECCP)of silicon nitride was researched. With SF6+O2 as etch gas, the effects of main parameters such as power, pressure, gas rate and He gas on etch rate and uniformity has been studied, and the mechanism of test result was analysed. The results show that power increases, etch rate increases, and compared with the source RF power, the effect of the bias RF power on the etch rate is more significan 关键词：silicon nitride;enhanced capacitive coupled plasma etching;etch rate- 74
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发布时间：2020-08-12 - 摘要：Regarding the problem of display nonuniformity under low gray level, experiments were designed to improve the display defect based on the luminance correction method of image processing. Based on high definition and super dark brightness CCD collector, the luminance information and Gamma curve data of each pixel of the liquid crystal display under low gray level were acquired, thus correcting the pixels one by one. The paper emphasizes on the introduction of the advantages of this acquisition system compared with others as well as the algorithm of brightness and cloud pattern correction. The experiment result indicates that the acquisition system can collect the brightness information of all pixels at a time, and can distinguish the luminance variety of each pixel effectively. The uniformity can be increased up to 100% theoretically. Under normal display condition, it can correct each frame of the picture independently in real time, ensuring the authenticity of the display information.关键词：panel;nonuniformity;luminance;low gray
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发布时间：2020-08-12
Material Science
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