OLED微显示器驱动控制电路研究

介绍一种MICROOLED公司OLED微显示器的驱动控制电路,重点研究其驱动控制和亮度调节方式。根据与一种用于近眼显示图像源的高温多晶硅液晶微显示器的参数对比,确定该OLED微显示器可用作近眼显示图像源。     

基于Kopin公司AM LCD微显示器的头盔显示器数字像源的驱动控制

针对Kopin公司的AM LCD微显示器, 提出了一种头盔显示器数字像源的设计方法, 包括显示器件、驱动方式、时序控制及数据处理方法等, 形成了头盔显示器数字像源的产品实物, 满足了相关性能指标的要求。     

分辨率为800×600的硅基OLED微显示驱动芯片设计

设计了一款用于驱动分辨率为800×600的OLED微显示器的驱动芯片,利用10位的DAC将数字视频信号转成模拟信号,然后经过两个8位DAC实现数据的偏压和增益调整,可以适应微显示器在不同环境下对亮度和对比度的需要。像素电路采用了改进型的电压型驱动方式,能够在较宽的OLED公共阴极电压范围内维持很大的电流比率。该电路采用0.35μm 2P4M混合信号工艺完成了设计,进行了流片验证,已在芯片表面成功制作了OLED阵列,实现了微显示器的静态和动态画面显示,微显示器亮度可达11 000cd/m2,在此条件下,对比度可达到10 000∶1。     

单层基板涂覆式彩色胆甾型液晶显示

描述了新型超薄彩色胆甾型液晶显示器,该显示器的各个功能层是依次涂覆于一个柔性基板上的。首次采用共享电极驱动器驱动无源矩阵彩色的乳液基的显示器,该显示器是由三层包埋于聚合物基体中的胆甾型微滴层积而成。     

双拍双存储伪并行LCoS微显示器交流驱动的研究

双拍双存储式驱动的LCoS微显示器引入了一些新的问题，对此提出了应用于双拍双存储式驱动的LCoS微显示器的新的交流驱动方式，通过互补驱动信号电压和浮动公共电极电压相结合的方法，不但满足了LCoS的要求，而且降低了工作电压。     

微显示技术及其发展前景

简单介绍了微显示器及其应用,分析了微显示器市场,比较了不同厂家研制的微显示器产品性能,对微显示技术与发展前景进行了探讨。     

无线OLED微显示器系统的设计与实现

针对现有微显示器系统采用硅基液晶(LCOS)带来的功耗、用户体验不佳,以及图像发送端和微显示器之间一般通过物理电线连接,或者采用传输效率不高的无线图像传输协议等问题,采用OLED微显示器和基于非压缩数据的无线图像数据传输协议WHDI的无线传输模块,利用FPGA EP2C8Q208C8作为核心控制器件,设计了主控制器以及OLED微显示器的驱动与控制模块,从而完成了整个无线OLED微显示器系统的设计,实现了高清图像的无线实时传输和显示。     

基于非对称椭圆中心凹JND模型的硅基微显示器

为解决高分辨率、高刷新率微显示器存在的传输数据量过大的问题，针对人眼视觉特性以及数字驱动硅基有机发光二极管（OLED）微显示器的扫描方式，提出基于非对称椭圆中心凹最小可觉差（JND）模型的位平面图像压缩算法，并针对该算法设计了相应的硅基微显示控制器，在现场可编程门阵列（FPGA）平台上验证算法的可行性。实验结果表明，与当前其他JND模型相比，该模型更加符合人眼视觉特性，基于该模型的位平面图像压缩算法能够在不影响人眼主观感受的前提下，对图像进行较大程度的压缩，图像平均压缩率可以达到39.573%，能够有效降低微显示器中的传输数据带宽。     

硅基微显示技术

使用硅基微显示技术制造的显示器具有尺寸小、低功耗、图像大的特点,特别适用于移动式个人显示器的投影系统。在各类硅基微显示器中,硅基液晶微显具有明显优势。本文介绍了主要微显示技术及其应用产品,同时分析了微显市场,概述了微显技术在中国的发展。     

高亮度LCoS微显示器的接口设计

为了提高LCoS微显示器的亮度，提出了双拍存储伪并行的驱动方式，设计了适用于高亮度LCoS微显示器的接口ASIC（专用集成电路），从而使LCoS微器的亮度可以提高数倍，并获得了更小的接口尺寸和更低的功耗。     

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.     

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.     

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.     

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.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

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.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.