最新刊期
      期 5 ， 2017

        Invited Paper

      • Zhen LIU,Dong SHEN,Xiao-qian WANG,Zhi-gang ZHENG
        Vol. 32, Issue 5, Pages: 325-338(2017) DOI: 10.3788/YJYXS20173205.0325
        摘要：Blue phase liquid crystal, exhibiting optical isotropic, selective reflection and fast response, has attracted a cumulative attention due to its elegant three-dimensional self-organized helical superstructure. Such fantastic properties enable the applications on not merely displays, but the diverse advanced photonic devices. In the recent years, tremendous endeavors were contributed on photonic applications of blue phase liquid crystal in China mainland, ranging from the materials, with excellent thermal st  
        关键词：blue phase liquid crystal;superstructure;material design;photonic devices   
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        发布时间：2020-07-07

        Material and Device

      • Jun-chen DONG,Wen YU,Hui-jin LI,De-dong HAN,Sheng-dong ZHANG,Xing ZHANG,Yi WANG
        Vol. 32, Issue 5, Pages: 339-343(2017) DOI: 10.3788/YJYXS20173205.0339
        摘要：Because of the advantages in high mobility and low temperature process, oxide thin film transistor (TFT) becomes the hotspot in display technology at present. Gadolinium-aluminum-zinc-oxide (GdAZO) thin film and GdAZO TFT (active layer is GdAZO thin film) were fabricated. The photoluminescence spectra and the transmittance of GdAZO thin film demonstrate the application potential in transparent display. The transmission electron microscope image discovers the amorphous microstructure of the GdAZO thin film. The GdAZO TFTs manifests preferable transfer characteristics and output characteristics. The on-to-off current ratio is larger than 105, and the saturation mobility is about 10 cm2·V-1·s-1. The results imply that the GdAZO is a category of feasible candidate for oxide TFTs, besides, the GdAZO TFTs can serve as the drive devices in pixel circuits.  
        关键词：GdAZO;TFT;active layer   
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        发布时间：2020-07-07
      • Guang-ming ZHANG,Jin-chao BAI,Hong-ming QU,Yi-cun ZHANG,Kai YU
        Vol. 32, Issue 5, Pages: 352-356(2017) DOI: 10.3788/YJYXS20173205.0352
        摘要：The vertical line mura which was caused by the via hole undercut between gate insulating layer and gate line has been researched. The effect of plasma enhanced chemical vapor deposition (PECVD), dry etch, sputter on via hole undercut was studied, and via hole morphology was characterized by scanning electron microscopy (SEM), the ratio of vertical line mura was tested by cell test equipment. The via hole undercut can be removed by changing via etch power, pressure, gas flow, and the vertical line was reduced from 1.4% to 0.7%.  
        关键词：vertical line mura;undercut;via hole   
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        发布时间：2020-07-07
      • Xue-bing HUO,Jin-wei HAN,peng ZHANG,Hong-chao GENG,Qiang GE,Xing-li DING
        Vol. 32, Issue 5, Pages: 357-360(2017) DOI: 10.3788/YJYXS20173205.0357
        摘要：A FPD-GC method for determination of organic phosphorus impurities in liquid crystal material was established. The method with good reproducibility can be applied to simultaneous determination of triphenylphosphine and triphenylphosphine oxide. The relative standard deviations (RSD, n=5) of triphenylphosphine oxide and triphenylphosphine were 4.4% and 5.6%. The recoveries ranged from 80% to 110%. The experiment has a good guiding significance to the establishment of the analytical method in the process of industrialization.  
        关键词：liquid crystal material;organic phosphorus impurities;FPD   
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        发布时间：2020-07-07
      • Hong-zhen JING,Ying XIANG,Feng WANG,Ming-ya XU,Wen-jiang YE,Rui YUAN,Chun HE
        Vol. 32, Issue 5, Pages: 361-366(2017) DOI: 10.3788/YJYXS20173205.0361
        摘要：The effects of the electro-convection in bent-core nematic (BCN) liquid crystals (LCs) are demonstrated. Because of the unique V shape structure, the electrical transport parameters of the BCN LCs are very different from that of traditional rod like (LC), which can lead to the non-standard electro-convections. We systematically study these new behaviors via changing the frequency, amplitude, polarity of the driving electric field and the temperature.  
        关键词：bent-core nematic liquid crystals;non-standard electro-convection;electric field   
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        发布时间：2020-07-07
      • Dong-ru KANG,Yun YE,Jiang-sheng WANG,Shan-hong LV,Qi XIN,Tai-liang GUO
        Vol. 32, Issue 5, Pages: 367-371(2017) DOI: 10.3788/YJYXS20173205.0367
        摘要：In order to reduce field shield effect, zinc oxide (ZnO) dendritic structures were controlled by pattern technology and their properties were studied. Firstly, patterned zinc oxide (ZnO) thin films were prepared by the use of photolithography on the ITO glass substrate. Patterned dendritic ZnO arrays were successfully synthesized on the ITO covered with patterned ZnO thin film by using a simply electrodeposition approach. Then, the morphology and structure characteristics of as-prepared ZnO nanostructures w  
        关键词：patterned;dendritic ZnO;electrodeposition;field emission   
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        发布时间：2020-07-07
      • Xin-yu LI,Ruo-zheng WANG,Sheng-li WU,Zun-chao LI
        Vol. 32, Issue 5, Pages: 344-351(2017) DOI: 10.3788/YJYXS20173205.0344
        摘要：The paper focuses on analyzing the performance of thin film transistors with different insulation material and different insulation layer structures, based on semiconductor simulation software Silvaco TCAD and combined with experimental validation. The research model is based on the bottom grid structure, and the semiconductor layer is made of amorphous IGZO material. The insulation layer is made of different combinations of SiNx and HfO2 with overlapping structure. The simulation and experiment results sho  
        关键词：semiconductor device simulation;thin film transistor;insulation layer;SiNx;HfO2;overlapping structure   
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        发布时间：2020-07-07

        Driving and Controlling

      • Li HAN,Shi-zan WANG,Jun WANG,Lei WANG,Xin HE
        Vol. 32, Issue 5, Pages: 372-379(2017) DOI: 10.3788/YJYXS20173205.0372
        摘要：In order to solve the problems that the existing data acquisition system cannot have many channels, high speed and real-time storage at the same time, a real-time collection and storage method of multi-sensor dynamic parameters based on FPGA and large-capacity flash was proposed. The system took FPGA as the core processor to control and read the analog-to-digital conversion chip, added check bytes after the conversion, realized the high-efficiency data interaction with the flash through the double FIFO buff  
        关键词：FPGA;double FIFO;double flash;real-time storage;USB   
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        发布时间：2020-07-07

        Display and Image

      • Jian-bo WANG,Hang YANG,Xiao-tian Wu
        Vol. 32, Issue 5, Pages: 380-386(2017) DOI: 10.3788/YJYXS20173205.0380
        摘要：In order to smooth image detail and preserve edge information well, a new edge-preserving filter is proposed in this paper. The filtering and detail enhancement method based on the proposed filter is studied. First, based on image intensity and color, the mean shift method is used for image segmentation, and we obtain several areas. Second, the guided image filter is used for each area, and several filtered images are separated with each other. Third, we fuse these filtered images to obtain a final result. Finally, a multi-scale detail enhancement method based on improved guided filter is proposed. Experimental results indicate that the proposed filter approach can obtain edge-preserving smoothed image, and detail enhanced image with less hole than guided filter. The proposed filter can obtain better results than guided filter in smoothing and detail enhancement.  
        关键词：image segmentation;guided filter;edge-preserving;detail enhancement   
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        发布时间：2020-07-07
      • Wei-ping WU,Hai-jiang SUN
        Vol. 32, Issue 5, Pages: 387-393(2017) DOI: 10.3788/YJYXS20173205.0387
        摘要：In order to convert the original data of the ultraviolet annular imager to the brightness data quickly, the ultraviolet data processing system of the ultraviolet annular imager is established. The system adopts the document view architecture to process the data-flow to ensure no interference between data channels. The noise of detector is corrected by the mean value of dark pixels, and the proportion method is used for converting the pixel values under the standard integral time and gain conditions; the pix  
        关键词：ultraviolet spectrum;method of spectrum integral;dark noise;ultraviolet annular imager;data process   
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        发布时间：2020-07-07
      • Jing LI,Jian-jun LI
        Vol. 32, Issue 5, Pages: 394-401(2017) DOI: 10.3788/YJYXS20173205.0394
        摘要：In order to establish the modeling of spatial viewing zones and implement theoretical calculation of crosstalk for the Autostereoscopic Display Device, this paper proposes the modeling of spatial viewing zones and crosstalk calculation method that are based on a optical simulation software named Lighttools. First of all, in the Lighttools, three spatial plane detectors have been established by regarding the original viewing distance (OVD) as the centrolaxis. In addition, the simplified modeling of spatial v  
        关键词：autostereoscopic display device;spatial viewing zones;crosstalk;Lighttools;illumination;space model   
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        发布时间：2020-07-07
      • Zhi-bo FAN,Xiao-qing GONG,Dan-feng LU,Ran GAO,Yao-hua DENG,Zhi-mei QI
        Vol. 32, Issue 5, Pages: 402-409(2017) DOI: 10.3788/YJYXS20173205.0402
        摘要：A Surface Plasmon Resonance Imaging sensor based on hue algorithm has been presented. The sensor can be used for observing the chemical or physical reactions on the surface of the SPR chip. What is more, the hue algorithm can be used to analyze these reactions on the surface of the SPR chip quantitatively. First of all, the wavelength/image synchronous detection SPR sensor was used to obtain the resonance spectra with different resonance wavelengths and the corresponding color images. And then, the hue algo  
        关键词：color surface plasmon resonance imaging;resonance wavelength;hue;inhomogeneity of the thickness;RI sensitivity   
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