最新刊期
期 5 ， 2014
- 摘要：Four ring liquid crystals with ethylene-bridge have been widely used in liquid crystal mixtures. However, their mesomorphism properties have not been reported systematically. The mesomorphism properties of new four ring liquid crystals with ethylene-bridge (EA3E and EA5E) were thoroughly studied by using differential scanning calorimetry (DSC) and polarising optical microscopy (POM). The relationship between structure and properties in the existing four ring liquid crystals with ethylene-bridge was discussed. The results show that the position and number of ethylene-bridge have a great impact on the thermal properties of the four ring liquid crystals. The influence of ethy-lene-bridge on four ring liquid crystals depends on their types. So reasonably introducing ethylene-bridge in different four ring liquid crystals, the liquid crystal monomer with excellent performance can be obtained.关键词：four ring liquid crystals;ethylene-bridge;mesomorphism;diphenyl acetylene;fluorine substituted
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发布时间：2020-08-12 - 摘要：In order to achieve a narrow border on TFT LCD product, the impact of different factors was analysed. The alignment film printing precision control was strengthened, meanwhile factors involved in the process were researched and analysed. The accuracy of the alignment layer printed version shrinkage associated change of Contraction rate of APR, APR Jig, Edge angle and edge Aperture Opening Ratio were optimized.The method to control PI EM was found. Experimental results indicate that the process capability of PI EM was improved by offset and Shrinkage Optimization(Ppk 0.66→1.31).Edge fluctuations were significantly improved by the way of change of clamp fixation and hanging version way(fluctuations in the amount of edge: 477→138 μm).The edge fluctuations improved significantly by APR edition edge angle changes (75°→45°@300 μm from the edge) (fluctuations in the amount of edge: 63→43 μm).The edge fluctuation was further optimized by reducing the amount of carrier liquid (APR plate edge through the opening ratio optimization 300 μm,(30%→35%)(fluctuations in the amount of edge: 43→22 μm). It can satisfy the requirements of alignment film printing precision stability control and narrow frame.关键词：TFT LCD;small size;narrow border;PI EM
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发布时间：2020-08-12 - 摘要：Polymer dispersed cholesteric liquid crystal samples with large droplets were made, and the droplets had strange "gem" texture by polarizing microscope. The new vertical helix and parallel helix configuration in the polymer disperse cholesteric liquid crystal droplets were proposed. Considering the bipolar and radiation configuration of polymer disperse nematic liquid crystal, the "gem" texture may correspond with degeneracy coexistence of multi domain texture of vertical helix and parallel helix configuration. This experiment had basic research significance for liquid crystal optics and reference value to design the new liquid crystal device.关键词：polymer dispersed liquid crystals;gem texture;polarization microscopy;cholesteric droplets;configurations
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发布时间：2020-08-12 - 摘要：L0 Side Mura is the common defect of TFT-LCD. After analyzing the stress status of panel surrounding area, the root cause can be revealed. It can be found that the stress distribution of glass substrate is quite uneven during cell assembly process, and this induced the deformation under the influence of smaller resultant force in local area, then caused cell gap fluctuating around the panel and generate defect. To solve this issue, dummy seal open mode was applied to make differential pressure between inside and outside the main seal on both sides into balance, which reduced the failure rate slightly lower. Nevertheless, the incidence of L0 Side Mura can be effectively reduced to 0.3% by improving dummy seal process to solve the problem of mechanics imbalance in certain. Furthermore, it will be avoided in development stage of new product through optimizing design scheme around Panel.关键词：L0 side Mura;panel;cell gap;dummy seal
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发布时间：2020-08-12 - 摘要：In order to follow with the trend of miniaturization narrow frame and fine wiring structure, the TFT-LCD tends to develop for large margin of design and high real substrate utilization rate. The passivation layer deposit parameters were changed to decrease the size of via hole which connected the pixel electrode and drain electrode were studied on the previous articles. In this paper, based on the previous data, via hole etch process optimization were studied, and finally to get further improvement in hole size to meet the trend of miniaturization and narrow frame on TFT-LCD panel.The main parameters (power, pressure, gas ratio, etch rate ratio) to minimize via hole by etching process through the experiments design were studied. A solution to further minimize the via hole size about 10%~20% which refered to previous study was found. The array yield test and process stability test were evaluated.Finally, one better solution to minimize via hole size was obtained and applied into mass production.Therefore, the products quality was improved also.关键词：passivation layer;etch;via hole
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发布时间：2020-08-12 - 摘要：The leakage current mechanism of poly(methyl-methacrylate) and poly (vinylidene fluoride-trifluoroethylene) double layer structure insulator film, which was fabricated by spin-coat process on silicon and provided a capacitance approaching 32 nF/cm2,was investigated in the paper.The experiment result shows that there are two turning points on the leakage current-voltage curve. The result implies that the film leakage mechanism is different under different electric field intensity. Fitting analysis of the experiment results shows that leakage current of the insulating film is mainly caused by Poole-Frenkel effect in voltage range of 0~1 V, and in voltage range of 1~25 V, it was affected by Schottky emission.The leakage current is mainly controlled by space charge limit current in voltage range of 25~40 V.关键词：OTFT;double layer gate insulator film;leakage current mechanism
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发布时间：2020-08-12 - 摘要：The positive and negative magnetoresistance in poly(3-hexylthiophene) (P3HT) photovoltaic cells are demonstrated by adjusting the thickness of the P3HT layer. It is found that the magnetoresistance of the photocurrent is thickness dependent in P3HT devices: the measured magnetoresis-tance in 44 nm-thick P3HT devices is 2.8% while a sign change could be observed in 105 nm-thick P3HT devices (-5.2%). We fabricated the 1-(3-methyloxycarbonyl)propyl-1-phenyl C61(PCBM) and P3HT blended films with different proportions and the resulting devices exhibit the gradually decreased magnetoresistance with increasing the PCBM ratio. The magnetic field could change the ratio of the singlets and triplets, then affect the exciton-dissociation and exciton-charge reaction. When the PCBM is blended, the excitons dissociate into free carriers at accept-donor interfaces effectively, the ratio of the singlets and triplets would not affect the photocurrent any more, since they both can be contribute to the photocurrent by dissociation.关键词：magnetoresistance;excitons Dissociation;exciton-charge reaction;hyperfine intersystem crossing
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发布时间：2020-08-12 - 摘要：By analyzing massive Zara samples, four theoretical modes were created to illustrate the relationship of the classified Phenomenon and appropriate cause, and on this basis, experiments were designed to reduce the zara defect. We found that the floating zara with the size of about 5 μm was mainly the chip caused by rubbing process; the irremovable zara with the size between 10 μm and 25 μm was mainly caused by alignment film coating; the large size zara with a clear outline was mainly environmental particle, while the large size zara with blurry outline was mainly domain leakage because of orientation failure. The experiments were designed to reduce the Zara defect and the result showed that after improving the alignment coverage and changing CF OC material, zara defect was obviously reduced. Furthermore diminished CF profile angle can effectively avoid Zara procreation at the source. The research and improvement of zara defect raised the product yield of more than 5%, laid the foundation for a stable and efficient production of enterprises.关键词：TFT-LCD;small size;Zara;classification
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发布时间：2020-08-12 - 摘要：For holographic waveguide display system, the beam splitting membrane, adopted for obtaining continuous output pupil, can form step-shaped light intensity distribution, and only when the diffraction efficiency of output grating is step-shaped distribution, can the uniform diffraction output intensity be obtained. To guarantee the output intensity uniformity of light within the diffraction angle bandwidth, a grating model which owns continuous increasing diffraction efficiency is established. Based on segmentation weighted average and quadratic curve fitting of the step-shaped distribution, the calculation model is optimized and curve of diffraction efficiency distribution is obtained. In addition, the output intensity distributions of various fields are calculated from the diffraction efficiency distribution curve. The results show that the minimum position uniformity of output area is 52.4% and angle uniformity within the whole exit pupil could reach to 84.9%. And analysis demonstrates that with the increase number of the beam splitting membrane, the intensity difference between the non-overlap and overlap region would be reduced and better image uniformity obtained.关键词：holographic waveguide display;image uniformity;continuous exit pupil;diffraction efficiency distribution;beam splitter
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发布时间：2020-08-12 - 摘要：From the adaptive optics point of view, we investigate the method for characterizing overdrive-matrix (OD) for liquid crystal wavefront corrector (LCWFC) in detail. In addition, the gray level number and delay time are optimized. After optimization, they are the 32 gray levels and the 14 frames delay time, respectively. Finally, OD and terminal phase matrix (TP) were measured and the atmosphere turbulence was corrected in simulation. The root-mean-square of residual wave front was 0.031λ,which indicated that the measurement method is feasible.关键词：liquid crystal wavefront corrector;adaptive optics;overdriving matrix;terminal phase matrix
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发布时间：2020-08-12 - 摘要：To realize a high efficiency development of an interactive interface, an universal GUI platform is designed in this paper, and the command/data transferring algorithm and interactive interface/master synchrony algorithm are also researched. The hardware of the platform is designed by using a S3C2440 processor to drive the TFT liquid crystal screen and quadded resistance touching screen directly. The following step is transplanting the real-time system into this platform, and building the unique command-data transmission channel according to the algorithms. Finally, the synchrony between the interface and the master is realized by synergism between the serial port and the master.The tests results show that this platform is used to design the master algorithm and the corresponding second-order interactive interface, which can be used to realize the interface switch, the display of data and state and the delivery of command and data. More than 90% of the setting time is reduced compared with the traditional method. Furthermore, the setting time may be reduced below 5% as the interface becomes more and more complex.This platform satisfies the interface design in many occasions.关键词：RTOS;GUI;S3C2440
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发布时间：2020-08-12 - 摘要：Obtaining the motor mechanical time constant Tm and inherent magnification K is knowed as system identify. Ship-borne photoelectric system was disturbed due to the roll, pitch, bow wave disturbance,and the reliability and accuracy of the system discerniblile directly affect the regulator parameter setting.Thereby, the steady state and dynamic accuracy will confront serious influence. Conventional formula method for motor mechanical time constant in the practical application is very inconvenient, and most of the occasions for Tm can't be gotten. Based on PC104 hardware platform, this paper deduced the approximate approach e exponential function as step method for system identification that is the theoretical basis, designed a friendly human-computer interaction interface to display and modify the result of the system on discerniblile easily. By test analysis: applying Origin fitting e exponential function can make the step method of Tm and K fitting credibility more than 96%, the fitting error is less than 0.1, accuracy can meet the needs completely. The problem of low accuracy and credibility has been solved for getting Tm and K in the practical engineering.This method is successfully used in some projects, and the results show that the method is feasible and practical.关键词：system identify;approximate approach e exponential;Origin fitting;step method;credibility
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发布时间：2020-08-12 - 摘要：With the time of using organic light emitting diode (OLED) monitor increasing, the OLED pixel driving circuits bring about shift of threshold voltage and power voltage, which will result in unstable and uneven brightness of the monitor. This paper studies the OLED pixel compensation driving circuit in order to prevent the phenomenon above. Firstly, this paper analyzes the universal driving circuit of 2T1C and finds the cause of uneven and unstable brightness monitor. Then, this paper tho-roughly analyzes the pixel driving circuit of 4T1C, which is popular in the market, and points out the defects of the circuit structure. Finally, this paper introduces a new structure of 5T1C pixel driving circuit, which has verified its feasibility by simulation to make up for these defects. The simulation results indicate that the output current is stable around 2 μA in the display stage. It can improve the uneven and unstable brightness defects of the OLED display.关键词：organic light emitting diode;active matrix;pixel compensation
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发布时间：2020-08-12 - 摘要：In order to test the performance of AM-OLED Display, an automatic V-I-L testing system based on virtual instrument technology was designed and used to acquire V-I-L curve. The perfor-mances of the AM-OLED Display (such as voltage-current, brightness, chromaticity coordinates, etc) could be measured in the same software. First, we built the hardware circuit: the driving circuit based on FPGA for AM-OLED Display. Then, a software system of V-I-L testing system based on virtual instrument technology was designed on this basis. Finally, we tested the 12.2 cm AM-OLED Display based on MOTFT technology which is developed independently, and verified the reliability of the system. Through the analysis of the test results, the data voltage of each pixel was about 9.2 V when the brightness of AM-OLED Display reached to the value of calculation.In brief, this system can achieve the automatic test of the Displays' performance parameters and make an assessment on screenperformance. What's more, it can not only provide reference data for the white balance adjustment and the design of AM-OLED driver IC, but also show the direction for the optimization design on the screen.关键词：AM-OLED;test;Labview
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发布时间：2020-08-12 - 摘要：Touch screen operation is simple, but the interface design is a difficult problem. In order to simplify the interface design, this paper developed a smart LCD touch screen. From two parts of hardware and software, the hardware part mainly divides into the selection of the design of LCD controller, touch screen controller, a main controller design. Software part includes UCCGUI transplantation to the establishment of the main controller, the user graph database and the touch screen and graphical interface design of monitoring program. As main control chip, LCD screen choose RA8875 of a pause with STM32103VET6 as main control chip, using RS232 communication technology to rea-lize the upper machine and lower machine communication.The schematic drawing,the PCB board production,electrical components of the welding and the program operation of this design have been monitored and debugged step by actually,and it has realized the intelligent effect of simple easy to operate.关键词：touch screen;UCGUI;RA8875 controller;graphical interface
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发布时间：2020-08-12 - 摘要：In the numerical control system, EnDat2.2 interface protocol is widely used because of its high-speed, high intelligence and high reliability. In order to meet the numerical control system's needs for embedded systems of EnDat2.2 protocol and replace manufacturers' expensive interface board,Endat2.2 communication protocols was analyzed, and the dual independent EnDat2.2 decoding module including the CRC checksum based on FPGA was developed. Finally, dual-channel data transmission circuit of absolute encoder was designed. The circuit was applied and tested on the linear encoder LC181. By experiments, it turns out that the circuit can transmit data quickly and accurately, and it proves the feasibility of the interface circuit.关键词：EnDat2.2;FPGA;CRC;encoder
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发布时间：2020-08-12 - 摘要：This paper studied the characteristics of uniform linear motion blurred image of the point spread function in noiseless case, and proposed an algorithm which identify the direction of motion-blurred image blur and blur length in frequency domain. Firstly, the causes of parallel dark stripes appeared in blurred image spectrogram were analyzed, and the characteristics of the direction of dark stripes perpendicular to fuzzy orientation were explained both in the theoretical and experimental methods. Then the RADON transform method was used to detect these dark stripes, for giving precise numerical estimation method. The SOBEL operator was used as first-order differential operators to the fuzzy image, to seek its autocorrelation curve, and estimates its blur length. The simulation analysis shows that the algorithm can accurately identify the image motion blur parameters, the absolute error of angle and length does not exceed 2 ° and 1 pixel, respectively.关键词：motion-blur;point spread function;Radon transform;frequency domain estimation
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发布时间：2020-08-12 - 摘要：In order to improve the inpainting effect of marginal structure, the priority of optimized Criminisi algorithm focuses on improving the robustness of a data item in this paper, and then the optimized Criminisi algorithm searches for the best matching module in global image. After these, this paper uses FDIM which is a kind of seamless splicing algorithms in repair region, which makes a harmony of the whole image. Lots of experiments prove that this method can deal with the details of marginal structure effectively and reduce the inaccurate matching as well as meets the demand of human visual, so this method has relatively high practical value.关键词：marginal structure;image inpainting;criminisi algorithm;FDIM algorithm
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发布时间：2020-08-12 - 摘要：For 3D bullet marks on data registration problem, a registration algorithm by matching regional features is proposed. After 3D data of bullet marks obtained through interferometer, first of all, multi-scale geometric analysis based on shearlet is adopted to remove the noise while reducing the loss of effective information; and then, the contour and texture of bullet marks is separated by an improved one-dimensional Gaussian filter.Besides,this paper partitions the texture information of 3D bullet marks,and makes the use of obvious effect of the brush strokes from texture information of the feature area for data registration.Finally,we introduce the homogeneous transformation matrix in registration process for improving the registration accuracy,compute the cross-correlation values of different data to evaluate registration effect,and complete the original 3D bullet marks registration according to the effect of texture registration.Experimental results show that the proposed registration algorithm can improve the accuracy of automatic bullet marks registration, the existing sample and automatic registration method can improve the correct rate from 90% to 98%.关键词：3D bullet marks;regional features;data registration;shearlet
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发布时间：2020-08-12 - 摘要：In order to improve the performance of the auto-focusing algorithm, focus measure function and focus search algorithm are studied. On the basis of analyzing the research results of the characte-ristics of the human visual system (HVS), a weighted wavelet focus measure function is proposed based on HVS. According to the visual multi-channel characteristics and the visual sensitivity band-pass characteristics, the different weights of the high frequency coefficients are set in different orientations and different spatial frequencies. To overcome the disadvantage of slow search speed of the mountain climbing searching algorithm, an improved searching algorithm is presented based on self-organizing map (SOM) neutral network. The well-trained SOM neutral network is applied to predicting the best focused lens position. The experimental results demonstrate that the characteristic of the proposed wavelet focus measure curve is better than that of traditional wavelet focus measure curve. Only 7.3 images need to be collected and processed averagely in the process of finding the best focused lens position by improved searching algorithm. Compared with the full search method, the proposed approach can reduce the search time greatly. It is concluded that this auto-focusing method can not only obtain the focusing effects in accordance with the human visual system, but also achieve auto-focusing rapidly.关键词：auto-focusing;focus measure function;focus search algorithm;human visual system;wavelet transform;SOM neural network
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发布时间：2020-08-12 - 摘要：In order to satisfy the requirerment of image location accuracy for space TDICCD remote sensing camera at scroll imaging, a method of improving image location for scroll imaging is proposed. First, based on the principle of TDICCD remote sensing camera, the line period in normal imaging mode and scroll imaging mode is calculated respectively. Then, the reason is analyzed that image location error would be too large in scroll imaging mode after working a period of time, and the method of calculating the image location error is introduced by record three kinds of data: ringing edge time of line cycle signal, ringing edge time of line synchronous signal and the time difference between the above two signals. Finally, image location error is calculated. Experimental results indicate that the image location error is less than ground sample distance in an imaging process. It can satisfy the system requirement on image location accuracy.关键词：remote sensing camera;TDI CCD;scroll imaging;image location;accuracy
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发布时间：2020-08-12 - 摘要：With the development of wood industry and the large requirement for the wood surface processing quality, traditional artificial detections have been difficult for satisfying wood processing production requirement. By knowing the classification of wood surface defects, defect causes and characteristics of wood surface defect images, we compare and analyze the average method, maximum method and the weighted average method on image gray effect, and the weighted average method is selected. In Matlab 6.5 GUI programming framework, we implement wood defect detection system by choosing the Isodata clustering iteration method, Otsu method of maximum variance, maximum entropy method and Sobel edge segmentation method for image segmentation and comparisons. We can achieve the fast and accurate image segmentation and wood material defect detection by using the Isodata clustering iteration method.关键词：image segmentation;wood material defects;Isodata clustering iterative method;Otsu maximum variance method;maximum entropy method
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发布时间：2020-08-12 - 摘要：In order to enhance the image details and improve image contrast, this paper presents a contrast stretch sub-layer segmentation algorithm. First, the histogram is divided into four sub-layer equally according to feature of the histogram. In each sub-layer, the sub-layer are expanded or compressed on the basis of the probability density of gray value. In order to prevent the gray area being overly compressed or stretched, the constraint factor α is introduced. By applying field programmable gate array (FPGA) as the central processor, the algorithm is modeled on combination of logic mode-ling. Based on the histogram statistics results, the algorithm can be completed in a single clock cycle,and the time was reduced by 5×103 ns compared to the pipeline operation.This system can meet the requirements of real-time processing for 50 frames/s image processing and has high integration, and high image processing speed and real-time features.关键词：image enhancement;segmentation sub-layer;FPGA;real-time operation;combinational logic
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发布时间：2020-08-12 - 摘要：The presented binary particle swarm optimization algorithm is used to improve the quality of image edge detection. First, the particle velocity is updated through logistic tranform which isn't restricted. Second, position of particle is adjusted dynamically, and state of flight is adjusted fully. Third, inertia weight of particle is adjusted dynamically by normal cloud generator, smaller particle is got optimum inertia weight. Finally, the processing of image edge detection is described. The experiment results show that the edge detection is precisely and clear,SNR is 35.928 1db, time is 1.454 3 s.It has large information and takes less time.关键词：particle swarm optimization;binary;edge detection;gray
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发布时间：2020-08-12 - 摘要：Laser active imaging systems are widespread observation tools used to fulfill recognition and video-tracking. Laser-dazzling on imaging systems aims to saturate or damage the full camera image. If there is a laser spot in the field of view, the tracking system cannot distinguish between the target and the laser spot. In order to evaluate the dazzling effects of the laser and avoid such a disturbance, the assessment of laser-dazzling effects must be better understood. This paper proposes a new algorithm composed of edge similarity (ESIM). Luminance comparison, contrast comparison and edge definition comparison are computed for the original and disturbed images. Based on the results of the above, we could construct a modified assessment. In terms of experiment results,ESIM is efficacious to reflect the quality of tracking image and it can evaluate the laser dazzling effect on tracking successfully.关键词：laser-dazzling;contrast tracking;correlation tracking;edge similarity
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发布时间：2020-08-12 - 摘要：Due to the special imaging features of digital micro-mirror device, the scene simulation system need to be addressed in the course of their work frame matching problem to avoid an image aliasing.The modulation characteristics of DMD chip pulse width and the effects that frame rate matches the simulation scene imaging system were analyzed. Through carrying out the system experiments in different display time and detector integration time, the frame matching condition of static scene simulation was obtained, which was that the phenomenon of image aliasing could be avoided when the detector integration time was integral multiple of the display time of simulation system without external synchronization trigger signal. This method can reduce the difficulty in engineering implementation, and it is also important to popularize the application of infrared scene simulation system.关键词：frame rate matching;digital micro-mirror device;infrared scene simulation
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发布时间：2020-08-12 - 摘要：In order to improve the effectiveness of texture mapping, this paper proposed a constraint texture mapping method based on the evaluation value to determine which object function to select. This algorithm computes evaluation value of internal vertices of every triangular block after the feature points triangulation in the parameter plane. The objective functions are not suited for any triangles.For these trangles,a triangulation iteratively was conducted.Experiments show that this algorithm is dropped an average more than 75% of the time than the classical algorithm. The model of this algorithm is loaded into the real-time rendering system with high frame frequency. Experiments show that the algorithm has good robustness, and repeated experiments show that the proposed algorithm can maintain good texture validity.关键词：computer vision;parameter plane;evaluation function;constrained texture mapping
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发布时间：2020-08-12 - 摘要：A system of two-view video's real-time synthesis is put forward mainly for small size display devices such as notebook computers. Firstly, the appropriate chips are choosed based on the system architecture and the interface of the display device, including conversion chips between video signals of different formats and a video synthesis chip. After that, the placement of the electronic components and routing of the wires on the board are accomplished based on the definition and position relationships of the input and output pins on the chips. Finally, software programs were written and downloaded to all the used chips based on the optical parameters of the lenticular lens on the display device. It was proved that the processing rate of the video signal on the board can achieve up to 2.24 Gbits/s. The system was proved to achieve a real-time two-view video synthesis efficiently, and the notebook computer with lenticular lens can achieve a very good real-time glasses-free three-dimensional display effect.关键词：two-view;video synthesize;lenticular lens;glasses-free 3D;real-time display
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发布时间：2020-08-12 - 摘要：In recent years, many techniques have been proposed to achieve stereoscopic display, such as parallax barrier, lenticular lens and multi-projector technology. There are many products of AS3D, but the method of testing and evaluating the AS3D equipments is still in initial stage. How to effectively determine the effect of AS3D equipments becomes one of the important issues of AS3D development. This paper firstly elaborated the conventional testing methods, including the subjective testing, objective testing and the statistical testing. Secondly, several latest measuring methods and index of AS3D based on brightness information have been analyzed. Finally, we discussed the development trendency of the AS3D measuring system and noted that the methods of the subjective and objective testing might be combined, while bionic information collection and processing will replace conventional tests. So the test results will be much closer to the people's true feelings.关键词：stereoscopic display;testing system;binocular disparity;bionic test;subjective evaluation
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发布时间：2020-08-12 - 摘要：In order to take advantages of tracking and real time record, a color reversion algorithm based on CMOS camera is proposed.The hardware platform is designed and reversion quality is analyzed quantitatively.First, the Bayer filter method based on color filter array is presented and mathematics module is designed.Then the bilinear algorithm is introduced and the edge detection method is added in order to reduce the zip effect when the edge of an image is crossed.The hardware and software is introduced.Experimental results indicate that the algorithm can offer a better PNSR which is 14% increased than the bilinear algorithm while the real time processing is achieved.The algorithm can give consideration to tracking and real time record, the objective calculation and subjective judgement indicate a better visual effect.关键词：optic-electronic theodolite;Bayer filter;image processing;color reversion
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发布时间：2020-08-12 - 摘要：This paper designs and realizes a real-time motion detection technology for complex cruise scene. The technology is suitable for dynamic target recognition in engineering application. First of all, two images of the background and the current frame are processed by convolution operation and extract the edge images. Then we put parts of background edge image and compute their local entropy. According to the value of the local entropies, we can select reasonable registration model group and compute correlation strength and the value of movement offset. The value is the offset of the model group and the current edge image. We complete scene motion estimation by them. The experimental results show that the method can be used in the infrared and visible images. The infrared image processing time is 13 ms. Its resolution is 320×256 and frame rate is 50 Hz. The optical image processing time is 24 ms. Its resolution is 768×576 and frame rate is 25 Hz. They reach real-time processing requirement of the engineering application. Meanwhile, motion detection of scene effectively excludes the interference of target recognition which is produced by the complex background image. We can accurately detect the movement and changing target.关键词：moving detection;local entropy;image registration
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发布时间：2020-08-12 - 摘要：In order to meet the requirements for most applications, a novel design of colorful LED display is proposed by taking Persistence of Vision theory as its theoretical foundation. In this paper, the hardware circuit is presented, the image data extracting procedure is listed, the program flowchart is drawed, and plenty of practical tests are also made about the whole system. The colorful LED display is made by 32 tri-color LEDs spaced at regular intervals in a straight line. High-speed rotating display of this kind would be able to show the intact pre-set image under the control of Microcontroller Unit (MCU). It works better in visibility than monochrome display or Flat Panel Display (FPD).关键词：rotation display;colorful LED display;POV theory;better visibility;MCU
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发布时间：2020-08-12 - 摘要：TFT-LCD factory has the features of large investment, FAB size and energy consumption. To save energy and reduce consumption more effectively during FAB design, construction and operation,scientific, reasonable and feasible energy-saving measures and projects were taken to the key energy-consuming process, energy-consuming equipment as well as the critical factors affecting energy consumption. In this paper, the type and structure of energy consumption, distribution characteristics, energy balance, and energy efficiency index in TFT-LCD factory were studied. Analytic hierarchy process, energy balance analysis and standard comparison method were used to deeply analyze the main energy system and characteristics by summarizing the empirical data of similar projects designed by CEEDI these years. The analysis shows that electricity is the largest consumption of energy, accounting for about 75% of the comprehensive energy consumption of the whole factory. The power consumption of production equipment accounted for about 45% to 50% of all electrical, and array is the main energy consuming process, while the chiller system is the main energy consuming facility. In addition, nitrogen is the largest consumption medium, accounting for about 20% of the comprehensive energy consumption of the whole factory. The energy consumption structure and characteristics in this paper is consistent with actual operation characteristics of such factories, and it could be of high directive value to energy-saving for TFT-LCD projects.关键词：TFT-LCD;energy-saving;comprehensive energy consumption;energy consumption structure;energy balance;energy efficiency indicators
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发布时间：2020-08-12 - 摘要：As more and more mobile devices with HD capabilities, interconnected with high-definition display devices became industry focus, these technologies are in intense competition stage. From the perspective of practical application, through several methods including literature research, patent search, clustering analysis and so on, the key technical indicators of these latest mobile HD interface technologies are extracted. Those mobile HD interface technologies and the key technologies of mobile HD interface are introduced. Combined with the characteristics of mobile devices, from the coded transmission technology, technical performance, the interface specifications and other physical features, the features of various technologies are summarized and compared and the development trend is proposed. The results show that these features in the interface technology are different, but MYDP and MHL are more suitable for the development status.关键词：mobile HD interface;HDMI;MYDP;MHL
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发布时间：2020-08-12
Table of contents
- 摘要：The anchoring property of substrate, including the anchoring energy and the anchoring easy directon, can affect the distribution of liquid crystal director, which results in the capacitance change of liquid crystal cell, so the anchoring property may be determined by measuring the capacitance of liquid crystal cell. Based on liquid crystal elasticity theory and variational principles, the equilibrium equation and the boundary condition of weak anchoring parallel aligned nematic (PAN) and hybrid aligned nematic (HAN) liquid crystal cell are deduced theoretically. The variations of reduced capacitance of liquid crystal cell with applied voltage, anchoring energy coefficient and anchoring easy direction are simulated using the finite difference iterative method. The results show that the capacitance of liquid crystal cell will decrease with increase of the anchoring energy coefficient;the variation of capacitance of liquid crystal cell with the anchoring energy coefficient will reduce with the increase of pretilt angle;the capacitance of PAN cell is not greater than that of HAN cell for the same voltage and anchoring energy coefficient of substrate.关键词：capacitance of liquid crystal cell;anchoring energy;easy direction;weak anchoring;finite difference iterative method
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发布时间：2020-08-12
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