最新刊期
期 4 ， 2017
- 摘要：A transflective polymer-stabilized blue-phase liquid-crystal display (BP-LCD) with a corrugated electrode structure is proposed. To balance the optical phase retardation between the transmissive (T) and reflective (R) regions, two device structures are proposed. The periodic corrugated electrodes generate a strong horizontal electric field symmetrically distributed across the entire LC layer.The first device structure employs the same inclination angles but different cell gaps in the T and R regions.And the second device structure employs the same cell gap but different inclination angles in the T and R regions. Both of the device structures can obtain well-matched VT and VR curves. When the operating voltage is 9.7 V, the transmittance can achieve 89.05%. The proposed structure exhibits low operating voltage, high optical efficiency, and a wide viewing angle.关键词：blue phase;transflective liquid-crystal display;corrugated electrode
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发布时间：2020-07-07 - 摘要：To research the adhesion strength between polyimide (PI) solution and TFT substrate, a series of polyimide solutions with different viscosity were prepared to research its adhesion strength with TFT substrate by preparing a 5-layer adhesion sample. The results demonstrated that the adhesion strength between polyimide solution and TFT substrate increased at first and then decreased when the PI solution viscosity decreased from 86 CP to 15 CP. The long contact distance and small contact area between PI membrane and TFT substrate were the key factor to achieve high adhesion strength when PI solution viscosity was greater than 37 CP. However, when its viscosity was less than 37 CP, the cohesive energy of PI solution became the key factor to achieve high adhesion strength.When PI solution viscosity was 37 CP, it could meet the production requirements of low viscosity and high adhesion strength with TFT substrate.关键词：liquid crystal alignment layer;polyimide;adhesion strength
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发布时间：2020-07-07 - 摘要：
In order to adapt to the requirements of rapid response, the design of the liquid crystal celltends to lower thickness.It requests that the birefringence of the liquid crystal tends to be increased and the design of mixed crystal tends to add more concentration of multi-benzene liquid crystal monomer.Since terphenyl liquid crystal has a large birefringence, low rotational viscosity and high clearing point, it becomes an essential component of high birefringence liquid crystal formulations.Common terphenyl l 关键词：terphenyl;liquid crystal;multi fluorine LC;vinyl- 62
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发布时间：2020-07-07 - 摘要：Comparing with the degenerated map of photoresist with substrate under different condition of inductively coupled plasma (ICP) etch recipe, this article explored the relationship between the degeneration of photoresist and the structure of electrode. Research results showed that the edge of electrode, which we called Dam Area, has poor cooling performance, thus leading to much more possibility of degeneration. We also developed an optimized Dam structure of electrode that can be used to enhance the cooling performance of the substrate, and solved the degeneration issue.关键词：inductively coupled plasma;dry etch;low electrode;photoresist;wet strip
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发布时间：2020-07-07 - 摘要：The spotted and striped Mura on TFT-LCD Panel degraded product quality. The defect pattern matched the exposure stage by analyzing. It was found that the BM CD and Pixel Pitch are abnormal through researching the abnormal area characteristic parameter. Model analysis based on Stage Mura indicated that the bending of glass on stage shorted the Exposure gap, which shrank the Exposure area, and minified CD and formed transmittance difference. The bending of glass also shifted the Pixel Pitch, which resulted in light leak and Mura. The experiment showed that the difference of BM CD and Pixel Pitch were caused by Stage flatness, which could be improved by polishing stage and decreasing vacuum adsorption pressure. The light leak of Pixel Pitch could be also improved by extending CD. Finally, the CF BM stage Mura was improved greatly by CD increasing, stage polishing, and vacuum adsorption pressure decreasing, and the Stage Mura defect ratio decreased from 10.5% to 0.11%.关键词：TFT-LCD;Mura;CD;pixel pitch
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发布时间：2020-07-07 - 摘要：
Aiming at the problem of display Mura in touch LCDs, we put forward the method that different LCDs choose different optical adhesives or different bonding procedures. First of all, we put forward an equivalent simplification of the structure for the LCDs, the structure consists of up polarizer, CF substrate, liquid crystal equivalent layer, TFT substrate and down polarizer. and 2 LCDs are tested for mechanical characteristic parameters. Then, the simulation model is established according to the actual size. 关键词：touch panel;optical adhesive;elastic modulus;linear expansion coefficient- 76
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发布时间：2020-07-07 - 摘要：
A new procedure is proposed to extract the basic parameters for the accurate spice-like direct current (DC) current-voltage mode for OTFTs, which provides a much rigorous and accurate determination of main electrical parameters of organic TFTs. All the main electrical parameters are extracted in a simple and direct way from the experimental measurements, including the output characteristics cure and the transfer characteristics cure, with no need of assigning predetermined values to any other model paramete 关键词：organic thin film transistor;direct-current current-voltage model;parameter extraction- 48
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发布时间：2020-07-07
Material and Device
- 摘要：In the field of security, manual X-ray images analysis is a common method to detect illegal object. Due to manual analysis' strong subjectivity, it is easy to cause false detection. The illegal object classification by Tamura texture feature and random forest with X ray is proposed in this paper. Firstly, an automatic illegal object detection and identification system based on computer vision is introduced. Then a method based on Contourlet transform is proposed to extract Taruma texture. Finally, the random forest classifier is adopted to classify illegal objects. Experimental results show that the illegal object classification by Tamura texture feature and random forest with X ray can effectively distinguish different kinds of illegal object.关键词：illegal object with X ray;Contourlet transform;Taruma texture feature;random forest;classification
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发布时间：2020-07-07 - 摘要：
In order to solve the problem of low image contrast and serious noise pollution in the process of biomedical image processing, a modified lattice Boltzmann method is proposed. The algorithm structures the piecewise linear stretching function, and constructed it as the external force factor of the LBM formula to build the evolution equation. The algorithm adjusts the change factor σ to synchronously control the correlation between image noise reduction and contrast enhancement to eliminate the contrast betwe 关键词：discrete lattice Boltzmann method;image denoising;external force factor;relaxation factor;balanced distribution- 24
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发布时间：2020-07-07 - 摘要：In order to obtain the true 3D display, we use the multi-layer screens to display the attenuation image with depth information. The display system includes the multi-layer liquid crystal device module, multi-channel driver module and high brightness backlight. We capture the objects from different angle, calculate the sparse matrix about the light field according to the project direction, and obtain the attenuation image by the least square fitting. At last, the attenuation image is conveyed to the three-layer LCD screen of display system by software. The experimental results show that the reconstructed image's mean square error is 71.5 and the peak signal to noise ratio is close to 30 dB, the effect is better. Finally, we give the experimental results which have the good 3D effect.关键词：multi-layer;3D display;light field;liquid crystal device
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发布时间：2020-07-07 - 摘要：
To improve the common background model that can be easily faulted by environmental factors, and the efficiency of neural network based on Fourier descriptor for a large number of gesture recognition, a pre-classified gesture recognition algorithm is designed. First, background difference detection plus a hand classifier is employed to recognize palm position and obtain regions of interest, while masks are updated respectively in hand regions and background. Experiments indicate its remarkable segmentation e 关键词：computer vision;gesture segmentation;pre-classification and recognition;Fourier descriptor;neural network- 45
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发布时间：2020-07-07 - 摘要：This paper proposed a method based on clutter rejection for small dim infrared target detection from horizon region. Firstly, the horizon pixels were detected by analyzing the features of infrared image and removing obstruction of islands, seaside or buildings, so as to determine the horizon region. Secondly, the horizon region was processed with improved mean subtraction filter and building background models to remove the horizon line clutter. Finally, it calculated the adaptive threshold of two region as the hysteresis threshold, so the dim target pixel could be determined. The experimental results show that the proposed method can effectively remove horizon line clutter to detect horizon pixels, and accurately detect the small dim infrared targets. It produces low false alarms and high detection rate, which validate the method.关键词：region segmentation;clutter rejection;hysteresis threshold;small dim infrared targets detection
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发布时间：2020-07-07
Display and Imag
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