单片机驱动SED1520显示动态曲线的编程方法

点阵式液晶显示器是近年来发展起来的一种新型显示器件，可显示任意字符、波形曲线或图形。其控制器使之具有功能强、控制方便等优点，克服了笔段式液晶显示器显示固定无法变化的缺陷。本文以单片机８０３１与点阵式液晶显示控制器ＳＥＤ１５２０的接口为例，讨论用于动态显示波形曲线的编程方法。     

单片机驱动SED1520显示动态曲线的编程方法

点阵式液晶显示器是近年来发展起来的一种新型显示器件，可显示任意字符，波形曲线或图形，其控制器使之具有功能强，控制方便等优点，克服笔段式液晶显示器显示固定无法变化的缺陷。本文以单片机８０３１与点阵式液晶显示控制器ＳＥＤ１５２０的接口为例，讨论用于动态显示波形曲线的编程方法。     

基于FPGA图形字符加速的液晶显示模块

在传统的工业控制应用中,由于工业控制计算机中集成了高性能的显卡,故通常采用工业控制计算机+液晶显示器的体系结构,可方便地实现以图形和字符为主的人机界面。而在对实时性能和可靠性要求比较高的航空航天领域,通常要求液晶显示器内部集成图形显示功能,以减轻主控处理器的负担,并提高系统的实时性。重点介绍了如何利用FPGA实现基于Bresenham算法的2D图形绘制(包括画点、画线、画圆、画椭圆),以及点阵字符和位图在液晶屏上的显示,并提出了显示性能优化的一系列策略。经过仿真验证和产品实际应用,该设计方法实现的液晶显示模块图形和字符显示功能稳定,性能良好,适合于航空航天领域高可靠性液晶显示模块的应用需求。     

手把手教你学PIC单片机C语言设计(八) 驱动16*2点阵字符液晶模块的实验

在小型的智能化电子产品中,普通的7段LED数码管只能用来显示数字,若遇到要显示英文字母或图像、汉字时,则必须选择使用液晶显示器.LCD可分为两种类型,一种是字符模式LCD,另一种为图形模式LCD.本章介绍的16x2 LCD为字符型点矩阵式LCD模组或称字符型LCD.市场上有各种不同厂牌的字符显示类型的LCD,但大部分的...     

具有广泛应用的LCD

Fieldtech 电子元件公司推出系列三洋液晶字符显示器。LCD 字符组件是由带 CMOS 驱动器和控制器的 TN 或 STN 液晶组成。三洋公司把显示器、驱动器、控制器和其它分立元件结合到一台小型装置中。LSI 控制器带有可产生16型字体根为5×7点的字母数字字符和符号的字符发生器ROM;此外,还有可产生32型字体根为5×10点的专用字符。LSI 还具有可使用户建立专用字符的字符发生器 RAM。     

通用LCD显示器投放市场

Sanyo 公司生产的 LCD 字符显示器系列产品已投放市场。LCD 字符显示模件由扭曲(TN)或超扭曲(STN)液晶材料构成,并具有 CMOS 驱动器和控制器。Sanyo 公司已把显示器、驱动器、控制器和其它分立元件集成化,因此装置的体积极小。控制器装有字符产生器 ROM,它可以产生160种字母数字字符和标点符号,每个字符由5×7点矩阵显示。此外,用5×10点矩阵显示32种特殊的字符。LSI 还包括字符产生器 RAM,使用者可以用它来设置用户字符。     

DMF5001液晶显示器与波形显示技术

DMF5001是日本东芝公司生产的集控制、驱动、显示为一体的薄板式点阵图形显示器，可用来显示各种字符和图形。文中介绍了DMF5001液晶显示器的工作原理和软、硬件接口电路，讨论了点阵式图形显示器波形的三种方法，最后给出了部分显示实例。     

字型,字体可变的图文并显

通常所说的图文并显是指图形与字符同时显示于屏幕上.但存在两个问题,一是字体小,二是字型单一.本文所讨论的图文并显是指在绘图状态下,利用可变的基本图形元素绘制好图形后,再在需要汉字的地方绘制任意尺寸、任意字体、任意字型的汉字,达到字体可变图文并显。本软件特别适用于儿童辅助汉字教学.     

基于STM32的R61581驱动液晶屏显示方法研究

提出一种基于R61581显示驱动芯片实现液晶显示屏驱动的方法。本方法以STM32为主控制,采用可变静态存储控制器(FSMC)接口实现R61581显示驱动。文中具体给出STM32与R61581的硬件连接方式以及FSMC的软件配置方法,并给出基本字符图形显示验证方法。实验证明:该FSMC接口硬件连接简单,液晶显示操作占用系统CPU资源少,800×480分辨率屏幕刷新率达到42FPS,可支持大部分液晶屏的驱动。     

嵌入式控制系统LCD驱动问题研究

文章讨论液晶（LCD）显示驱动问题。液晶显示模块一般由控制器、驱动器和显示屏组成,不同型号的显示模块只要使用同一型号的控制器,驱动程序基本相同。液晶显示控制器根据结构可分为TN、STN和TFT几种,根据功能则有字符型和点阵型之分。字符型LCD只能显示西文字符和笔划较少的汉字,功能较少,价格低廉,编程容易;点阵型LCD功能强大,可以显示较复杂的汉字和各种曲线。虽然LCD产品型号繁多,功能各异,但其驱动程序还是有规律可循。本文就液晶显示驱动规律谈自己的工作体会,供同行参考。     

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