最新刊期
期 5 ， 2018
- 摘要：Flexible display has attracted much attention due to its advantages such as lightweight, foldable, non-friable, easy to design. And flexible substrate plays an important role in the flexible electronic devices. In this article, the basic performances of flexible display are introduced, including thermal stability, surface performance, barrier properties, electrical properties, optical properties and mechanical properties. The paper also describes one main packaging technology, for instance, film encapsulation, and some challenges of paper substrate may meet in the future. Finally, the development of paper substrate in display technology is prospected. Paper not only meets the basic performance of flexible display, but also can bend and has environmental degradability. It tends to displace polymer substrate and has a promising future.关键词：flexible display;paper substrate;electronic devices;performance;barrier layer
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发布时间：2020-08-12 - 摘要：We investigated the relationship between line image sticking with different drive signal voltages and their inversion modes, because TFT-LCD easily produces line image sticking. The result shows that line image sticking and the coupling between common electrodes and data lines can be reduced by decreasing the drive signal voltage, or increasing the inverse-frequency of drive signal. When the gray level voltage is reduced from L255 to L46, the coupling voltage amplitude is reduced from 240 mV to 34.8 mV. When the driving signal changed from frame inversion to point inversion, the coupling voltage amplitude decreased from 112.6 mV to 63.1 mV. We also analyzed the mechanism of the inversion mode of drive signal on line image sticking by using Debye relaxation formula. The solution and theoretical basis were established for line image sticking by the research.关键词：line image sticking;distortion;the mode of drive signal inversion;drive signal voltage
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发布时间：2020-08-12 - 摘要：
In order to reduce the high threshold and saturation voltage, obvious hysteresis effect and increase the contrast ratio of Polymer Network Liquid Crystal (PNLC), the surfactants are used to solve the above problems. The surfactant can reduce the interaction between the liquid crystal and polymer network. As a result, the anchoring energy of the polymer network is reduced, thus the lower threshold and saturation voltage of PNLC can be obtained. In this study, the different mass fractions of surfactant (Polyo 关键词：polymer-network liquid crystal;surfactant;threshold voltage;saturation voltage;hysteresis effect- 322
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发布时间：2020-08-12 - 摘要：
In order to develop and promote the large size 8K display better, 8K industry chain was investigated systematically, including market, key link, technologies and players, and the 8K display development and promotion strategies were proposed from the angle of the whole industry. The result shows that 8K market is about to explode in 2020 and the total shipments will be 2.425 millions (M). The 8K process needs to be promoted by the whole industry chain, including content shooting, encoding/decoding, transmiss 关键词：8K display;shooting;encoding/decoding;transmission- 384
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发布时间：2020-08-12 - 摘要：
Aiming at a vertical Mura occurred in the TFT-LCD (Thin Film Transistor-Liquid Crystal Display) products with PCI (P-ITO and C-ITO Interchanged) structure, this paper did amount of work, combined with the actual situation of productive technology and through CD (Critical Dimension), EPM (Electrical Properties Measurement) and SEM (Scanning Electron Microscope) equipment, such as experiments testing, data processing and theoretical analysis. By measuring characteristic parameters (Cell Gap, Film thickness, C 关键词：liquid crystal display;P-ITO and C-ITO interchanged structure;vertical Mura;uniform brightness- 353
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发布时间：2020-08-12
Material and Device
- 摘要：
Aiming at the control method of Auto_Refresh instruction in SDRAM controller, a periodic and distributed refresh algorithm is proposed. First, A SDRAM controller is compiled by Verilog HDL. In reading or writing process, m, n, the continuous times of reading or writing is confirmed by SDRAM clock frequency and the row number of L-BANK. An Auto_Refresh instruction is given after m reading or n writing instructions. Because FSM is almost always in the state of IDLE in the process after reading and writing, Au 关键词：periodic and distributed refresh;SDRAM controller;FPGA;finite state machine;instruction lagged behind;instruction execution efficiency- 301
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发布时间：2020-08-12 - 摘要：
In order to compensate the driving voltage of driver chip of thin-film-transistor liquid crystal display(TFT-LCD) to improve the performance of TFT-LCD, in this paper, based on the standard CMOS (3.3 V) chrt35rf 0.35 m process, a bandgap reference circuit with continuously adjustable temperature coefficient is designed. The circuit includes three sub-modules of a core circuit, an operational amplifier circuit, and a startup circuit. Using a MOS transistor as a variable resistor, the source-drain equivalent 关键词：bandgap reference;continuously adjustable temperature coefficient;PTAT current;PNP transistor- 294
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发布时间：2020-08-12 - 摘要：
Since the height of aerial image shot is much lower than the height of satellite image shot, this may lead to the differences of the projection sizes and directions between every shooting location, which will result in serious picture distortion in most cases. In addition, the degree of distortion of the image edge region is much more serious than that in the center region, a distortion correction method based on Lagrange interpolation of polar coordinates has been proposed by this paper. We use this method 关键词：distortion correction;aerial images;satellite image;polar coordinate transformation;Lagrange interpolation- 321
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发布时间：2020-08-12 - 摘要：
Aiming at the problem that the metal lines breakage easily occurs during the bending process of COF connection transition zone in the OLED panel, the mechanism of crack propagation and the way to inhibit the crack propagation in the metal line are studied. Based on the theory of interface crack deflection and penetration, the mode of crack growth at the interface between metal line and organic photoresist is analyzed. The change of stress intensity factor of the two metal line during crack growth is compare 关键词：metal line;crack growth;energy release rate;stress intensity factor- 348
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发布时间：2020-08-12 - 摘要：
In the paper, the linear octree was used to separate the 3D model of the heart into voxels and to achieve the purpose of rapid display of any interested vessels. After the 3D model is separated into voxels, the polygon area is used to select inside voxels of VOI. Based on the topological relation of 26-adjacent voxels and the similarity of voxel mutual information, the final optimal depth and best mutual information threshold are confirmed as respectively14 and-1.375, thus discovering the voxel set of the s 关键词：volume of interest;linear octree;voxelization;4d-visualization- 348
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发布时间：2020-08-12 - 摘要：
In order to obtain better robustness, real-time and tracking accuracy in human eye tracking process, this paper proposed a relocation tracking method based on adaptive boosting (AdaBoost), random forest (RF) and space-time context (STC). The algorithm structure was divided into three layers, which was AdaBoost face detection, STC face tracking and RF eye positioning. First, AdaBoost was used to recognize faces in the first frame to extract face windows. Then, the spatio-temporal context algorithm was employ 关键词：adaBoost;random forest;spatio-temporal context;face detection;human eye location- 307
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发布时间：2020-08-12
Image Processing
- 摘要：
Since the height of aerial image shot is much lower than the height of satellite image shot, this may lead to the differences of the projection sizes and directions between every shooting location, which will result in serious picture distortion in most cases. In addition, the degree of distortion of the image edge region is much more serious than that in the center region, a distortion correction method based on Lagrange interpolation of polar coordinates has been proposed by this paper. We use this method to interpolate the single pixel in polar coordinates system. The pixel coordinate expression will be reconverted from polar coordinates to Cartesian coordinates after we corrected the pixel according the consequence of interpolation. And finally this method will be used to correct distortion pixel-by-pixel throughout the aerial image. The experiment results show that the corrected aerial image distortion does not exceed 3%, which proves that this algorithm can not only correct distortion image effectively, but also has a wide applicability compared with the traditional distortion correction methods, such as making use of the Direct Linear Transformation to obtain the distortion matrix.
关键词：distortion correction;aerial images;satellite image;polar coordinate transformation;Lagrange interpolation- 33
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发布时间：2020-08-12
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