TFT-OLED像素单元电路及驱动系统分析

本文基于TFT-OLED有源矩阵像素单元电路,着重分析了两管TFT结构、三管TFT结构、四管TFT结构及多管TFT结构的电压控制型与电流控制型像素单元电路的工作原理和优缺点,指出电压控制型电路具有响应速度快的特点,而电流控制型电路则能准确地调节显示的灰度.最后简要讨论了控制/驱动IC对TFT-0LED有源驱动电路的影响.     

其它电路与技术

0603638 TFT-OLED像素单元电路及驱动系统分析[刊,中]／朱儒晖／／中国集成电路．-2005,(11)．-70-76(G) 本文基于TFT-OLED有源矩阵像素单元电路,着重分析了两管TFT结构、三管TFT结构、四管TFT 结构及多管TFT结构的电压控制型与电流控制型像     

TFT-OLED驱动电路的研究

从OLED的发光原理出发,介绍了OLED器件的结构特点和常用的TFT OLED像素电路的结构。利用TFT OLED行列驱动芯片和控制芯片,通过MCS 51单片机的控制来驱动240×320×3点阵的TFT OLED屏,实现大信息量的图形显示。该设计方案所需外围器件少,硬件结构简单,有利于提高系统的运行效率。介绍了驱动模块的功能和硬件接口电路的设计方法,并给出了单片机的软件流程图。     

多晶硅OLED象素常用驱动电路分析

在多晶硅TFT-OLED中，驱动电路所用TFT的阈值变化量(△VT）会导致显示亮度不均匀，以及灰度低下。因此，需要设计特殊的象素驱动电路来克服这些缺陷。本文把一些常用驱动电路分成OLED的模拟驱动和数字驱动电路，对其性能和工作机理进行细致分析，并指出其中的电路局限性，其间给出产生高灰度的方法。     

管道机器人CCTV检测系统设计探讨

本文介绍了国内CCTV检测系统的现状,并结合国内管道非开挖修复技术和进口CCTV检测系统在国内使用经验,给出了一种基于AVR单片机和R485通信模式的CCTV整体设计方案,详细描述了CCTV各部分的设计思路和工作原理,对各部分的驱动机构和电路控制方案都有介绍。     

步进电机驱动电路的设计

本设计系统地介绍了步进电机驱动电路控制系统的组成、设计方案、电路原理等一系列的设计过程。步进电机驱动电路控制系统是以AT89C51单片机作为控制核心,步进电机为控制对象,运用汇编语言编程实现系统的各种功能。该系统由单片机最小系统、步进电机驱动模块L298、显示电路、4*4键盘电路四大部分组成。电路具有性能稳定、成本低廉等优点,有较好的应用价值。本文通过对步进电机驱动电路控制系统的设计与研究,从而理解步进电机在各种装置中的运行模式和工作状态的实现。     

挂蜡机控制器设计

介绍挂蜡机控制器的设计方法,采用单片机控制,系统由键盘电路、单片机、A/D转换器、液晶显示器、时间电路和驱动电路等组成。根据系统要求,对单片机选择、键盘接口、时间电路接口、液晶显示电路接口、A/D转换器接口和驱动电路的设计作了较详细的介绍,并对电路的工作原理进行了介绍。     

强磁水处理仪设计

系统采用单片机控制,由键盘电路、A/D转换器、单片机、液晶显示器、时间电路和驱动电路等组成。根据系统要求,对键盘接口、时间电路接口、液晶显示电路接口、单片机选择、A/D转换器接口和驱动电路的设计作了较详细的介绍,并对电路的工作原理进行了阐述。     

基于HD66773的TFT OLED驱动电路的设计

介绍了用驱动TFT LCD的HD66773芯片驱动5cm(2in)TFT OLED的电路设计．通过对芯片做出合理的特殊设置,最终可以显示出8种颜色,达到初步点亮TFT OLED的目的．并给出了初始化软件流程和MCU接口。     

数码管驱动电路ICM7218及其应用

ICM7218是一种多功能LED数码管驱动芯片,可与多种单片机接口使用。ICM7218的输出可直接驱动LED显示器,不需外接驱动电路,其构成的显示电路结构简单,使用方便。同样由单片机向ICM7218写控制字及数据,编程部分像给外部RAM写数据一样简单。介绍了数码管驱动电路ICM7218的构成、工作原理、控制字及数据写入时序图及其功能,并给出了具体应用电路。     

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