OLED的无源驱动技术

主要介绍了有机发光二极管(OLED)的无源驱动技术。分析了无源驱动电路的特点和驱动电路,即利用程控恒流源驱动OLED,达到不同灰度的显示。重点讨论了利用预充电技术提高无源OLED器件亮度的均匀性。     

高灰度级彩色OLED驱动电路的研究

介绍了OLED显示技术及相关市场信息，讨论了当前OLED的驱动技术、芯片和存在的问题，提出OLED高灰度级扫描实现方法和驱动芯片的设计，并进行了系统测试与验证。     

有机电致发光显示器的研究进展

有机电致发光显示器具有功耗小、驱动电压低、视角宽、响应速度快等优点,是近年来平板显示技术领域的研究热点.本文在简要介绍有机电致发光器件工作原理的基础上,对有机电致发光材料、有机电致发光显示器(OLED)面板及其驱动技术的相关进展进行了阐述.最后,论文简单分析OLED的应用前景,展望了OLED在未来的产业化进程中所面临的机遇和挑战.     

有机电致发光显示器件基本原理与进展

对有机电致发光显示器件的发展历史，器件结构、工作特征、获得彩色显示的方法以及优缺点、发展现状和趋势等作了简要介绍。对小分子OLED与聚合物PLED、OLED与LCD的性质进行了比较，对OLED显示的发光机理进行了详细的综述。此外，对获得彩色显示的无源驱动电路和有源驱动电路的结构进行了总结，认为有源驱动将是最终发展结果。最后介绍了国内外OLED技术的发展状况。     

OLED显示和固态照明

OLED（Organic Light-Emitting Diode）,又称为有机电致发光显示器（Organic Electroluminesence Display,OEL）它是用有机半导体发光材料在电驱动下产生的发光来实现的显示和照明技术。近年来,显示和照明技术获得了空前的发展,本文主要针对与小分子OLED显示和照明技术产业相关的问题进行综合评述。     

有机电致发光器件封装技术的研究进展

有机电致发光显示器件(OLED)被认为是最有潜力的平板显示器件之一.由于OLED具有低驱动电压、高亮度、宽视角及超薄等优点,逐渐成为各国研究的热点.OLED对水分和氧气都非常敏感,进入到器件内部的水分和氧气会严重影响器件的寿命,因而影响OLED的产业化发展.OLED器件的有效封装能延长器件的寿命.综述了玻璃衬底、柔性衬底OLED封装技术的研究现状,以及不同封装的优缺点.     

OLED技术及面临的技术问题探讨

OLED作为平板显示技术的新一代宠儿,成为近年来平板显示技术研究的主要方向之一。本文从OLED技术发展历史开始,介绍了OLED技术分类、技术原理和技术特点并对OLED面临的技术问题进行了探讨,并对OLED市场前景进行了展望。     

基于ARM7的全彩有机电致发光器件显示系统

以ARM7芯片LPC2138为微控制器,设计了基于间接控制接口技术的全彩OLED驱动控制电路.LPC2138通过向驱动控制器SSD1355U4提供数据信号和控制信号,从而实现全彩无源OLED屏的65 k色显示,分辨率为128×128.文章主要从硬件接口设计以及驱动程序两方面详细介绍了如何实现OLED屏全彩图片显示.     

高灰度视频OLED显示控制系统设计与应用

在详细分析AFD公司OLED面板电气特性和各种OLED灰度扫描原理的基础上,对AM-OLED扫描驱动电路进行研究,采用FPGA作为核心控制器件,完成了高灰度OLED视频显示系统设计。系统主要包括DVI接口信号处理模块、内存管理模块和灰度扫描控制模块,其中成像核心模块采用子场扫描工作方式;解码后的DVI信号经过一系列处理,可实时地送到OLED屏上显示,且灰度等级256级和64级可选。视频OLED显示系统实现了240×RGB(H)×320(V)QVGA分辨率,256级灰度显示,帧扫描频率为60～100Hz。电源驱动板共有7个电源输出,可根据外部环境来分别进行调节OLED屏的亮度,以实现OLED高灰度视频显示。     

用于0LED显示驱动芯片的双端口SRAM设计

详细描述了一种集成在OLED显示驱动芯片中的双端口SRAM设计.从电路和版图两方面对SRAM的核心部分进行了详细描述,并且设计了一种用于灰度0LED显示驱动芯片的132×64×6 bit的双端口SRAM.基于0.35μm CMOS工艺进行了芯片流片及测试,得到了正确的测试结果并已成功应用于一款OLED显示驱动芯片中.     

Technology innovation and process integrations for sub-100nm gate patterning

This paper presents a brief overview of the Applied Centura(R)DPS(R)system,configured with silicon etch DPS Ⅱ chamber, with emphasis on discussing tuning capability for CD uniformity control. It also presents the studies of etch process chemistry and film integration impact for an overall successful gate patterning development. Discussions will focus on resolutions to key issues, such as CD uniformity, line-edge roughness, and multilayer film etching integration.     

White organic light-emitting devices based on fac tris（2- phenylpyridine） iridium sensitized 5,6,11,12-tetraphenylnap -hthacene

We have fabricated the white organic light-emitting devices （WOLEDs） based on 4,4＇ -bis（2,2 -diphenyl vinyl）-1,1＇ - biphenyl （DPVBi） and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene （rubrene）. The device structure is ITO/2T-NATA （20 nm）/NPBX （20 nm）/CBP： x%Ir（ppy）3：0.5% rubrene （8 nm）/NPBX （5 nm）/DPVBi （30 nm）/Alq（30 nm）/LiF（0.5 nm）/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris （2-phenylpyridine） iridium [Ir（ppy）3], acts as a yellow light-emitting layer, and N,N＇ -bis- （1-naphthyl）- N,N＇ -diphenyl -1, 1＇ -biphenyl-4,4＇ -diamine （NPBX） acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir （PPY）3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V.     

Complete approach to automatic identification and subpixel center location for ellipse feature

To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction.     

小角度扩展相关性近似算法分析

本论文提出一种在多天线MIMO信道相关性建模中小角度扩展近似理论算法,并应用于分析MIMO系统性能。分析中分别对三种不同角能量分布情况下的空间相关性研发快速近似计算法,并同时提出双模(Bi-Modal)角能量分布情况下的近似运算。通过分析这些新方法的近似效率,可以得到计算简单、复杂度低、而且符合实际的MIMO相关信道矩阵,对系统级的快速高效计算法的研究和系统级的评估以及误差分析具有重要的意义。     

A Versatile Mixed-Signal Pin Approach for Cost-Effective Test of Automotive ICs

Integrated circuits (ICs) intended for increasingly sophisticated automotive applications bring unique test demands. Advanced ICs for applications such as highly integrated automatic braking system (ABS) and airbag controllers combine high voltage digital channels, significant VI demands and precise timing capability. Along with continued missioncritical reliability concerns, the trend toward higher voltage operation and increased device integration requires specialized test capabilities able to extend across the wide operating ranges found in automotive applications. Among these capabilities, automotive test requirements increasingly dictate a need for a cost-effective versatile mixed-signal pin electronics with very high data rates reaching up to 50MHz with a voltage swing of-2 V to +28 V.     

Optical vibration and deviation measurement of rotating machine parts

It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer （LDV）.     

社长序言（英文）

正Happy New Year!As we step into a new year,we take a look back at the key feature topics covered in China Communications over the past 12 months and set out our expecta-     

Call for Papers

正Introduction Jointly sponsored by the China Institute of Communications(CIC)and the IEEE Communications Society(IEEE ComSoc)since the year 2013,China Communications,currently,is aiming to gradually realise the transition from journal to magazine content and style.     

INTEGRATION OF OPTICAL AND WIRELESS NETWORKS

正For a long time,optical and wireless systems/net-works are developed in separate communities witha few attempts for in-depth convergence.In fact,it prom-ises many advantages to combine the optical and wire-less technologies in the levels of systems and networks.Recently,both academia and industry have made manyefforts to enter a new phase of development to take op-tical and wireless systems as fully integrated networks.To provide high bandwidth and reliable service for bothfixed and mobile users,a well-designed network must     

Call for Papers—Feature Topic,Vol.12,No.3,2015

正Smart Grid Communications The electric power industry is undergoing profound changes as the industry aims to capture the promise of a smart grid for a sustainable energy future.Enabled by the advanced sensing devices such as Phasor Measurement Units(PMUs),increasingly powerful