有机电致发光平板显示器件的进展

随着有机电致发光器件的研究和发展，以有机材料为基础的有机电致发光器件（OLED）所表现出的各种特性和它在平板显示领域的广泛应用，OLED平板信息显示器件已经引起了人们广泛的关注。该文在简单地介绍了有机电致发光器件的结构和发光原理之后，主要介绍有机电致发光器件性质特点、彩色柔性的实现方法以及当前产业发展的状况，并就OLED平板显示器的市场前景进行了预测。     

高性能印刷OLED显示关键材料与技术发展现状

印刷有机电致发光显示器件(OLED)是现代印刷制程与OLED显示结合形成的一种新型显示技术,具有工艺简单、材料利用率高、成本低、绿色环保、利于柔性化和大面积器件生产等优点。其作为新一代显示技术,已经成为世界各国抢占的产业战略制高点。简单介绍了OLED的市场规模、印刷OLED显示技术以及关键材料,并对印刷OLED显示关键材料的发展现状、面临问题以及解决方案进行分析。最后,分析了印刷OLED显示关键材料存在问题与该项研究能够带动的社会经济效益。     

有机发光器件(OLED)界面研究进展

有机发光器件(OLED)以其轻薄、柔性、可折叠、低功耗、面光源和响应快等诸多优越性能已成为下一代全彩柔性或硬底显示、固态白光照明的材料,在商业领域具有广阔的应用前景。然而,相对于液晶显示屏与LED照明,OLED的效率较低和稳定性较差,已经成为制约OLED发展的两大技术瓶颈。大量的研究工作表明,OLED的效率的稳定性与器件中的界面结构与界面特性紧密相关,为此开展OLED界面研究,探寻改善器件性能的新途径成为研究热点。首先介绍了OLED界面研究对器件性能调控的重要作用,随后结合本课题组最新的界面研究成果,分别从阳极/有机层界面、有机层/有机层界面、阴极/有机层界面和有机层内部界面等4方面介绍了OLED界面研究的最新进展,最后提出OLED界面研究的发展趋势。     

从AMOLED垄断打破看成果转化现状

<正>OLED,即有机发光二极管,又称为有机电激光显示、有机发光半导体。它与液晶显示是不同类型的发光原理。作为新一代显示技术,OLED被广泛运用于手机、数码摄像机、DVD机、个人数字助理(PDA)、笔记本电脑、汽车音响和电视等电子设备上。因为它不使用背光,所以OLED显示器很薄很轻,基于其有软性有     

OLED技术取得最新突破

日前,由清华大学和北京维信诺科技有限公司共同承担的国家科学技术部“863”计划高清晰度平板显示专项课题“有机发光显示器件研制”顺利通过验收。此次验收的成功,标志着清华大学和维信诺科技有限公司的有机发光显示技术(OLED)又取得了历史性进展。在课题验收现场,北京维信诺公司向验收专家、国家科学技术部和北京市领导展示了在课题研发期多款OLED样品。维信诺公司和清华大学联合研制的用于手机主屏的OLED彩色显示器首次公开展示,这款OLED显示器的色彩为26万色,分辨率为160×3×128,其亮丽的色彩、细腻的画面吸引了众人的目光。目…     

小分子有机电致发光材料研究进展

 有机电致发光器件（OLED）具有效率高、亮度高、驱动电压低、响应速度快以及能实现大面积光电显示等优点,因其在平板显示和高效照明领域具有极大的应用前景而引起广泛关注。在OLED的制备及优化中,有机电致发光材料包括小分子和聚合物的选择至关重要,其中有机小分子发光材料具有确定的相对分子质量、化学修饰性强、选择范围广、易于提纯、荧光量子产率高以及可以产生红、绿、篮等各种颜色光等优点,一直受到国内外学者的广泛重视。本文综述了近年来国内外有机电致发光小分子发光材料的研究状况,对有机小分子电致发光材料进行分类和评述,并简要介绍了小分子OLED的应用前景和发展趋势。     

新时代OLED的应用研究

随着科学技术的迅猛发展,各种电子产品日新月异。有机发光二极管(OLED)以其自主发光、无需背光、超薄柔韧、可视角度大、节能省电、构造简单等优异特性被认为是21世纪最具前途的产品之一。作为一种有机发光器件,OLED在照明、显示、成像、近场显微等区域应用广泛。基于提高能源利用率和改善OLED器件性能的目的,本文对OLED的构造及发光原理、出射光效率、发光质量及寿命、色彩纯度等方面进行了研究与总结。     

基于AL320C和AMOLED的视频信号转换与显示设计

设计一种有机电致发光显示(OLED)的驱动控制电路,实现320×240×RGB像素点全彩色视频图像显示。本文采用AL320C视频解码与显示控制芯片,在获得视频信号的同时,还可以获得控制信号,简化了OLED显示屏的驱动控制难度。本设计电路简单、成本低,实验表明显示效果良好,为各种便携式系统显示前端的设计提供参考。     

OLED显示器的现状分析

有机薄膜电致发光显示器以其自发光、高效率、低功耗和可挠曲的特点引起了平板显示界的研发和生产的热潮,OLED产品不断增多,但要占有市场,器件本身仍要解决诸多问题。本文讨论了OLED的现状、进展以及遇到的难题。     

基于亚阈值技术的AM-OLED驱动电路研究

有机电致发光二极管(OLED)作为新一代显示技术,将来极有可能取代LCD.OLED的驱动电路也成为研究热点.在已有有源阵列OLED(AM-OLED)驱动技术的基础上,提出一种结构较为简单的基于亚阈值技术的栅压控制OLED有源驱动电路,经过HSPICE仿真,该电路较好解决了工作于饱和区的有源驱动电路所引起的发光亮度非线性...     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to