发光二极管显示屏标准化研究

随着行业规模的扩大,发光二极管的标准化和规范化需求越来越迫切。研究了国内发光二极管显示屏的标准制定和标准体系框架,分析了SJ/T 11281—2017《发光二极管(LED)显示屏测试方法》中发光二极管显示屏的机械、光学及电学性能参数和对应的测试方法,介绍了近几年测试方法相关研究进展,提出行业标准的制定和完善对于整个LED显示屏行业发展的重要意义。     

LED显示屏质量提升的探讨

近年来LED显示屏被广泛应用于室内外显示领域。文章主要依据信息产业部标准SJ/T11141-2003《LED显示屏通用规范》和SJ/T11281-2007《发光二极管（LED）显示屏测试方法》,针对LED显示屏的一些重要考核指标如亮度、均匀性、视角和安全等,探讨如何提升LED显示屏的质量。     

LED显示屏视频传输、扫描驱动接口的方案分析及标准化问题

我国LED显示屏的发展已有近20年的历程，在电子技术、结构及封装工艺、标准化方面上都有了长足进步。信息产业部1998年颁布基本标准《LED显示屏通用技术规范》，2002年颁布了分支标准《LED显示屏测试规范》，业内厂家对起草、修订标准表现出很高的热情。随着电子技术的迅猛发展，LED显示屏视频传输方案、扫描驱动接口方案经历了由百家争鸣到几种主要的解决方案的发展变化，为LED显示屏系统标准化提供了可能性。     

如何正确理解LED显示屏的主要性能指标

从1998年开始,历经五年,在LED显示屏专委会(现为中国光协LED显示屏分会)组织努力下,《LED显示屏测试方法》行业标准(以下简称《标准》)即将发布实施。在广大会员单位的迫切要求下,《现代显示》杂志于2003年第3期开始刊登《LED显示屏测试方法》讨论修订稿,从而正确引导用户理解LED显示屏的性能指标,对规范LED显示屏市场具有非常重要的意义。为了更好地执行标准,提出以下建议。1最大亮度去年年底讨论的行业《标准》中,对于"最大亮度"这个重要性能没有给出明确的特性要求,这是符合GB/T1.2-2002的。在《标准化工作导则第2部分:标准中规…     

高清晰LED全彩色集成三合一显示屏

高清晰LED全彩色集成三合一显示屏是由中科院长春光机所控股企业长春希达电子技术有限公司自主开发的一款高画质、高性价比全色LED显示屏，该产品于2009年被评为“中华人民共和国首批自主创新产品”，产品技术水平达到国内领先，可与国际先进水平相媲美。是目前国内LED显示屏行业唯一被载人国家《科学发展报告》的产品。     

2005年我国LED显示屏产业发展综述

文章总结了2005年国内LED显示屏产业发展总体情况,对LED显示屏产业和市场发展进行了分析,介绍了LED显示屏产业技术和标准化进展,展望了LED显示屏产业的未来发展趋势。     

LED显示屏换帧频率的测试方法及程序

介绍LED显示屏换帧频率的测试方法及相应的测试程序。该方法及相应的测试程序符《LED显示屏通用规范》和《LED显示屏测试方法》，具有实用性强，交互性好，操作简便有序，响应及时和结论直观公正等特点。     

LED显示屏的电气安全要求及检验方法

详细介绍了电子行业标准SJ/T11141-2003《LED显示屏通用规范》中电气安全要求及检验方法.     

LED显示屏的可靠性要求与试验

结合实施《LED显示屏通用规范》，介绍了LED显示屏的可靠性要求、可靠性验证试验方案的选择和可靠性试验的实施。     

LED显示屏的温升要求及检验方法

详细介绍了电子行业标准SJ/T11141-2003《LED显示屏通用规范》中温升的要求以及温升的检验方法。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks