最新刊期
期 5 ， 2019
- 摘要：Based on the diffraction theory, a theoretical model of far-field intensity distribution of elliptically polarized Gaussian beam passing through the nonlinear medium was established. Using this theoretical model, the effect of the ellipticity of elliptically polarized Gaussian beam on the evolution of the far-field pattern was studied. The results show that the influence of the ellipticity on far-field diffraction patterns is different for different nonlinear mechanisms. For the molecular reorientation mechanism, the influence of the change of the ellipticity on the far-field pattern is the biggest, which will not only change the diameter of the pattern and the number of diffraction rings, but also change the spot of the pattern from dark to bright (or from bright to dark). In addition, the theoretical model is also applicable to the cases where the polarization state of the incident Gaussian beam is linearly polarized or circularly polarized.关键词：elliptically polarized Gaussian beam;nonlinear medium;diffraction patterns;ellipticity;nonlinear mechanism
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发布时间：2020-07-05 - 摘要：
The influence of the coupling capacitance (Cpd) between the pixel electrodes and data line on the display quality in TFT-LCD was researched and the mechanism of the horizontal stripes Mura after the pixel electrode shifted was analyzed. The results show that the Cpd coupling capacitance between the data line and pixel electrodes distributed on both sides are different which cause voltage hopping in different directions between pixels in adjacent rows when the pixel electrodes are offset. According to the ac 关键词：coupling capacitance;pixel electrode;horizontal stripes Mura;display quality- 429
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发布时间：2020-07-05 - 摘要：
The cyclic photosensitive chiral dopant has not only better photostability, but also the photoisomerization rate of the molecule, which can be regulated by controlling the ring tension. However, the compatibility between the cyclic molecule and CLCs needs to be improved. In this paper, naphthalene azobenzene cyclic photosensitive chiral dopant BPO5BA was prepared by introducing rod-like rigid substituents at the 6, 6' positions of the naphthalene group, which were similar to the molecular structure of the l 关键词：naphthalene;azobenzene;cyclic chiral dopant;photoisomerization- 370
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发布时间：2020-07-05 - 摘要：The relationship between parallax barrier opening ratio and auto-stereoscopic crosstalk was researched. Firstly, the fixed barriers with different aperture opening ratios were used to make 3D display and the rules were verified:the bigger the aperture opening ratio is, the bigger the 3D crosstalk will be (2%~4% increase of opening ratio can lead to 0.2%~2% increase of 3D crosstalk). However, the difference between 2D panels was not small and the manufacture of 3D panels might induce some offset, so the active barriers were used to verify the rule again. With a TN cell working as a parallax barrier, by modifying the operation voltage, the transmittance was changed, but other factors kept the same. For a 2view 3D display, when the operation voltage of parallax barrier increased from 4 V to 15 V, its 3D crosstalk decreased by 1.6% gradually. The results of this experiments lead to the rule:the bigger the aperture opening ratio is, the bigger the 3D crosstalk will be.关键词：auto-stereoscopic display;crosstalk;parallax barrier;active barrier;opening ratio
- 330
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发布时间：2020-07-05 - 摘要：In this paper, we explore a kind of horizontal stripes defect which happened 21.4% in TFT-LCD HADS product. Through analysis and improvement study, the main reason for horizontal stripes defect was the coupling effect of Vcom Feedback signal and CLK1, CLK2, CLK3 signal, and Vcom compensation circuit. As a result, there are three periodic fluctuations of Vcom before Gate closing, which form three lines of dark and three lines of bright horizontal rough lines. According to the principle analysis, the defect improvement experiment is verified. Finally, by adjusting the Vcom compensation circuit multiple, the defect is reduced to 0%.关键词：LCD;horizontal stripes defect;Vcom compensation circuit
- 421
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- 71
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发布时间：2020-07-05 - 摘要：
This paper makes a research on the relationship of ITO anneal to the transmittance of HADS TFT-LCD, which based on polyimide oven to replace ITO anneal for manufacturing efficiency enhancement. The result shows that 1st ITO and 2nd ITO anneal process with a shorter operation time, for example, 10 min makes the same level of transmittance as the normal case of 30 min. Furthermore, the 2nd ITO anneal skip process can also maintain a high-level transmittance, because the air infiltration through polyimide can 关键词：ITO;anneal;TFT;transmittance- 416
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- 86
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- 2
发布时间：2020-07-05 - 摘要：
The electronically controlled switchable mirror samples was produced by using TN-LCD liquid crystal cell and different polarizers, which appearance had the translucent visual effect. From one side, it looked like a black mirror or a fog mirror, while on the other side it looked like a black glass or frosted glass. The electro-optical properties of the samples were tested. The absorption-reflection mirror and the scatter-reflection mirror had a threshold voltage of 2.4 V and a saturation voltage of 5.2 V. Th 关键词：TN-LCD;electronically controlled switchable mirror;reflective polarizer;scattering polarizer;jones matrix- 342
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- 22
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发布时间：2020-07-05 - 摘要：
Poor gravity Mura has always been a difficult problem to solve in the display industry. With the increasing requirement of transmittance and contrast of display screen, product design Margin becomes smaller, therefore, the solution of gravity Mura is particularly critical. In this paper, the internal characteristic factors of the display screen are analyzed, and the LC Margin test is carried out by making sample with process change. It is proved that the main factor causing the change of LC Margin is the PS 关键词：gravity Mura;film thickness;LC margin;LC Amount- 433
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- 87
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- 2
发布时间：2020-07-05 - 摘要：
With the development of GOA technology, more and more GOA unit has been applied to small size TFT-LCD product. However, the display screen has an unstable display problem which is ascribed to the complicated GOA circuit configuration, characteristics and environmental factors such as temperature and humidity. In this paper, a horizontal stripes defect caused by GOA in display was deeply researched and the improving methods were given. This unusual phenomenon was related to corrosion of ITO in the GOA unit w 关键词：TFT-LCD;slim border;GOA;electrochemical corrosion of ITO;horizontal stripes defect- 615
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- 148
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发布时间：2020-07-05
Materials and Devices
- 摘要：
In order to make up for the shortcomings of the traditional division-of-time long-wave infrared polarization imaging system, image detection of the real-time dynamic high-temperature target polarization degree can be realized by using the ultra-high-speed and high-position precision rotating wheel on the basis of division-of-time infrared polarization imaging device. Using ultra-high speed and high positioning precision rotating wheel, the polarizing plate is rotated rapidly, the polarization state of the t 关键词：long-wave infrared polarization;moving target;polarization detection- 366
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- 5
发布时间：2020-07-05 - 摘要：
In order to get rid of the dependence of auto-focus algorthms on focusing system hardware in the process of verification and simulation, an evaluation and simulation system is developed in the way of image simulation, which is used for evaluating the performance of auto-focusing algorithm. By generating blurred images with different degrees of defocus, this system can realize the following two functions:the performance of different articulation evaluation functions can be evaluated, on the other hand, the a 关键词：auto-focus;performance evaluation;performance simulation;definition evaluation function;searching strategy- 345
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- 2
发布时间：2020-07-05 - 摘要：
In the field of video shot segmentation processing, SIFT features are widely used due to their many advantages such as scale and rotation invariance. However, SIFT feature extraction is complex and computationally intensive, resulting in low program efficiency and hard to achieve the requirement of real-time. In this case, an algorithm based on SURF features and SIFT features is proposed in this paper. The algorithm first performs color histogram feature extraction on the frame, determines whether it is a c 关键词：shot split;SIFT;SURF;color histogram- 323
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发布时间：2020-07-05 - 摘要：To solve the problem that multi-lens polarization cameras need accurate registration in acquiring images, this paper proposes a phase correlation algorithm based on sub-image. The algorithm first performs noise reduction and detail enhancement on the image followed by a coarse registration. Then the image is divided into multiple subgraphs, the subgraph of each corresponding area is registered, and the subgraphs with large registration errors is eliminated to reduce their adverse effects on the final result. Finally the univariate matrix is calculated according to the registration parameters of the remaining subgraphs to complete the final registration. The experimental results show that for all three different types of images, the proposed algorithm improves both the normalized mutual information values, up to 0.067%, and the image details. Compared with the original algorithm, the proposed algorithm has a better registration effect for low definition and high noise images.关键词：image registration;phase correlation;sub-graph;univariate matrix;polarization image
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发布时间：2020-07-05
Image Processing
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