最新刊期
- 摘要：
In order to reduce the incidence rate of Lead Open-type line defects in the TDDI products, the mechanism of the Lead Open was studied and validated. Meanwhile, the improved solution for the defects was determined and put verification based on the results coming from the TDDI production data comparison and the investigation on SD film of the Mo-Al-Mo structure. Three parts of the whole research process were contained. The relationship between the Lead Open incidence and Delay Time was firstly determined, and 关键词：TDDI;Lead open;Galvanic corrosion;electrochemistry;Mo-Al-Mo- 91
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发布时间：2020-08-12 - 摘要：We reported a fabrication technique of a high efficiency organic semiconductor laser device, which used a liquid crystal/polymer grating as an oscillation cavity. To fabricate a distributed feedback (DFB) organic semiconductor laser, the active medium poly[-methoxy-5-(2'-ethyl-hexyloxy)-1, 4-phenylene-vinylene] (MEH-PPV) film was spin-coated on a piece of clean glass plate, and then a liquid crystal/polymer grating was fabricated on the MEH-PPV film via localized photo polymerization under an optical interference field. The lasing threshold was 0.32μJ/pulse, and the conversion efficiency was as high as 7.8%. The lasing beams showed good character in s-polarization. The lasing beam pattern was collected by a digital camera, which showed a fan-shaped geometry. The 53.4 nm lasing range was obtained by varying the grating period. The high efficiency organic semiconductor laser in this work provides guidance for fabricating a novel organic laser device.关键词：organic semiconductor laser;liquid crystal/polymer grating;distributed feedback
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发布时间：2020-08-12 - 摘要：
In order to develop liquid crystal materials with low melting point, high birefringence (Δn) and fast response, we need to join in double ring type LC compounds with the low melting point under 50℃ and the Δn value with more than 0.35 in high Δn values of the liquid crystal mixture system, which can make fast response nematic phase liquid crystal materials meet the requirements of working at room temperature. The liquid crystal compounds of isothiocyanate diphenylacetylene were designed and synthesized in t 关键词：low melting point;high birefringence;isothiocyanate;synthetic- 34
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发布时间：2020-08-12 - 摘要：
Sparkle is one of the main factors which have a significant influence on anti-glare display. As the requirements of display resolution continue to improve, more and more attention has been focused on the sparkle. But up to now, there is no uniform knowledge and standards on the exact definition, the cause, the characterization methods and evaluation indicators of sparkle. The Sparkling phenomenon and definition are introduced in this paper. According to measurement, sparkle's current representation methods 关键词：anti-glare glass;sparkle;panel display;characterization- 37
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发布时间：2020-08-12 - 摘要：
At present, Mo/Al/Mo structural film is electrode material in TFT-LCD industry due to its advantages. The Critical Dimension Bias which is short for CD Bias and the Profile of Mo/Al/Mo electrode after etch process are important parameters which determine the TFT pattern and TFT characteristic. Therefore, it is necessary to identify the process parameters affecting profile and CD Bias in mass production, aiming at making profile and CD Bias under control, which would improve production yield and quality. In 关键词：Mo/Al/Mo structure electrode;profile;critical dimension bias;orthogonal design- 78
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发布时间：2020-08-12
Material Science
- 摘要：
In order to develop liquid crystal materials with low melting point, high birefringence (Δn) and fast response, we need to join in double ring type LC compounds with the low melting point under 50℃ and the Δn value with more than 0.35 in high Δn values of the liquid crystal mixture system, which can make fast response nematic phase liquid crystal materials meet the requirements of working at room temperature. The liquid crystal compounds of isothiocyanate diphenylacetylene were designed and synthesized in this paper. By adding the isothiocyanate group at the molecular terminal, the birefringence of the liquid crystal increased. At the same time, F atom is introduced at the benzene ring side to reduce the viscosity of the liquid crystals. The results showed that the two target compounds' Δn value were 0.39 and 0.4, and the melting points were 31℃ and 50℃, respectively, which would decrease the melting point of the present liquid crystals with a few milliseconds in response time as low as 10℃.
关键词：low melting point;high birefringence;isothiocyanate;synthetic- 14
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发布时间：2020-08-12 - 摘要：
The color management settings in the computer operating system have an important influence on the correct color rendering of monitor. For this problem, by means of the image processing software "Adobe PhotoShop" under Windows7 platform, the three color rendering schemes were designed depending on different Operating System ICC and Application ICC. The methods of Color Difference Calculation and Gamut Comparison were used to analyzed the influence of Operating System ICC on color rendering of monitor. The important conclusions are as follows:If the ICC profile made for the monitor was set as Operating System ICC, the color rendering effect of the monitor can be seen as a redefined result of the chromaticity by Application ICC. If the other ICC profile was set as Operating System ICC, the displaying colors will be converted to color space of Operating System ICC from color space of Application ICC. The greater the gamut difference between the two ICC profiles is, the greater the variations of the converted colors are. The conclusions of this study have some guiding significance for the application of monitor color management.
关键词：color Reproduction;ICC profile;gamut;monitor- 11
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发布时间：2020-08-12
- 摘要：Conventional In-Plane-Switching (IPS) mode blue phase liquid crystal (BPLC) display device demonstrates lower contrast ratio than expectation. This manuscript analyzes the physical mechanism behind it and proposes revised rhombus IPS electrode to solve the problem. Experiment result confirms that IPS electrode structure with rotated direction reduces light leakage by two thirds, rising the contrast ratio of the display device to > 10 000:1 accordingly. Based on this discovery, the rhombus IPS electrode design is proposed to pursue high contrast image in BPLC display system design. Besides, Techwiz simulation proves that "L" shape rhombus IPS BPLC device has similar voltage-transmission characteristics, 3/4 lower Gamma shift and 2/3 lower grey scale inversion than conventional IPS BPLC. This enables rhombus IPS BPLC display as a more competitive candidate for next generation display technology.关键词：blue phase liquid crystal;light leakage;rhombus electrode;in-plane switching
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发布时间：2020-08-12 - 摘要：As the lighting effects of aircraft rivets defect detection system play a key role on the defect detection quality, this paper optimized its lighting system.Based on the distribution function of fitting LED point light source illumination, taking the uniformity of background image grayscale of the measured part as optimization goal, the bacterial population algorithm is used to optimize the light source system parameters. According to the optimization results, the structure optimization of the light source system is carried out. The power control of each LED point light source is carried out, and the optimization effect is further improved through the optical component. The experimental results show that the optimal light uniformity is more than 95%, to meet the lighting requirements of rivet detection. This method realizes the effect of illumination system on the top surface of rivet, and the image quality is improved obviously.关键词：aircraft rivet surface defects;bacterial foraging optimization;source optimization;intensity homogeneity
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发布时间：2020-08-12
Driver and System
- 摘要：
To enhance the spatial resolution of the atmospheric turbulence image, an atmospheric turbulence image denoising algorithm based on wavelet domain Curvelet transform (WDCT) is proposed in this paper. This algorithm bases on the statistical property of the image noise and combines with Bayes Shrink theory to optimize threshold selecting. Firstly, the turbulence degraded image is performed to a single 2-D discrete wavelet transform (2-D DWT), then extracts the high frequency coefficients and make the fast dis 关键词：image processing;image denoising;curvelet transform;atmospheric turbulence;threshold value- 28
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发布时间：2020-08-12
Image Processing
- 摘要：
In order to overcome the shortcomings of large volume, high cost, low recognition accuracy and poor adaptability in PC seal identification system, an embedded seal imprint identification system based on SIFT-SVM was designed. The system first computed the SIFT characteristics of the seal image and further constructed feature vector based on SIFT matching. The seal feature vector was used to train support vector machine. The SVM's penalty factor and kernel parameter were optimized by genetic algorithm to get 关键词：SIFT;embedded;seal identification;support vector machine;genetic algorithm- 17
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发布时间：2020-08-12 - 摘要：
The color management settings in the computer operating system have an important influence on the correct color rendering of monitor. For this problem, by means of the image processing software "Adobe PhotoShop" under Windows7 platform, the three color rendering schemes were designed depending on different Operating System ICC and Application ICC. The methods of Color Difference Calculation and Gamut Comparison were used to analyzed the influence of Operating System ICC on color rendering of monitor. The im 关键词：color Reproduction;ICC profile;gamut;monitor- 23
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发布时间：2020-08-12 - 摘要：
To quantitatively evaluate the suitability of LCD for vision research experiments, this study developed a display performance testing system and process inspired by relevant literature with consideration of visual research requirements, and measured the key performance of a cathode ray tube (CRT) display and two general-purpose liquid crystal displays (LCDs). We compared these displays in performance measurements and analyzed the data regarding psychophysical theories, the Weber's Law in particular. Experim 关键词：liquid crystal display;cathode ray tube;weber's law;visual stimulator;performance evaluation- 34
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发布时间：2020-08-12
Display Technology
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