一种裸眼3D电视系统的设计方案

本文提出一种裸眼3D电视系统的设计方案,详细阐述了方案的原理及关键技术的实现.方案系统先将电视信号处理成单视点或双视点图像,然后将单视点或双视点图像转换成N个视点图像,并将N个视点图像交织成一幅合成图像来驱动裸眼3D屏发出图像光实现裸眼3D显示.该方案可快速应用于柱状透镜式和光栅屏障式裸眼3D电视产品,具有广泛的应用价值.     

基于人脸跟踪的时空无缝裸眼3D显示技术研究*

裸眼立体显示技术普遍存在视角范围受限、串扰严重、甚至存在逆视区域等问题.基于双目视觉与人脸跟踪的方法,根据人脸的空间坐标控制背光方式,在全分辨率裸眼立体显示的基础上实现了视区空间的无缝覆盖;并进一步采用ROI方法能程序运行帧率提升至20 f/s(帧/秒)以上,从而实现时间上的无缝切换.实验证明,基于此技术所研制的系统能满足人脸实时跟踪需求,实现空间与对闽无缝的裸眼3D图像显示.     

基于FPGA的裸眼3D图像显示系统的设计与实现

裸眼3D技术是无需佩戴任何助视设备即可观看到立体影像的新型光电显示技术。针对裸眼3D像素重配关键技术的研究,设计一种基于FPGA的裸眼3D图像显示系统,根据裸眼3D亚屏幕分区特点,使用硬件描述语言设计从SD卡中读取左右格式立体对图像数据、像素重配及裸眼3D LCD显示驱动等逻辑代码,完成左、右眼视图数据分割,并在裸眼3D LCD亚屏幕上进行像素重配。系统调试运行结果表明3D图像数据亚屏幕重配的硬件逻辑算法是正确的。     

4K裸眼立体显示系统设计

随着医疗显示技术的进步,医疗内窥镜摄像系统已经由主流的2D(Two Dimensions)显示向3D(Three Dimensions)显示发展,图像清晰度也从高清(High Definition,HD)向超高清(Ultra High Definition,UHD)转变。因此,本文设计开发了一种基于FPGA的4K(3 840×2 160)裸眼立体显示系统。首先,系统对双路3G-SDI图像采集并进行YUV到RGB的格式转换。其次,使用Xilinx提供的VPSS核实现图像的缩放,同时解决高速图像数据带宽与DDR3存储器带宽间的匹配问题。最后,通过SBS(Side by Side)的拼接方式,将满足立体图像输出格式的视频源通过立体显示器输出。该系统从前端立体图像的采集到后端立体图像的输出,需要经过格式变换、缩放、缓存、同步以及拼接等多个处理过程。实验结果表明,采用参考时钟为148.5 MHz的双路SDI输入,经FPGA的实时处理后可实现分辨率为3 840×2 160、刷新率为60Hz的SBS拼接格式图像,该图像可直接驱动裸眼立体显示器。     

基于Leap Motion手势识别的悬浮真3D显示实时交互系统

提出基于Leap Motion手势识别的悬浮真3D显示实时交互系统,可实现对多个悬浮3D图像的独立交互.系统由显示和交互两个模块组成,显示模块利用集成成像3D显示屏再现3D图像,再通过二面角反射镜阵列实现悬浮真3D显示;交互模块通过Leap Motion识别手部各关节空间位置,提取手势信息并判断用户操作意图,利用提出的...     

多视角裸眼3D电视的技术实现

研究超高清多视角裸眼3D电视的实现技术,从方案成本、设计简易度、工艺实现、系统架构、产品性能等方面分别对采用光栅式裸眼3D技术和透镜式裸眼3D技术进行探讨,接着再从视觉表现和技术实现上分析了双视角裸眼3D技术和多视角裸眼3D技术的优缺点,认为超高清屏幕将有效解决多视角裸眼3D技术带来的3D画面分辨率降低问题,因此超高清多视角裸眼3D电视将是未来3D电视的发展主流。     

裸眼3D视频信号转换技术研究

针对嵌入式裸眼3D设备需要同时在左右眼亚屏幕上显示立体对图像存在数据量较大和视差图像准确处理等问题,仔细研究了左右格式立体图像和液晶显示屏视频信号特点,提出一种ARM与FPGA相结合的视频信号转换系统。ARM系统作为视频播放和外设支持,为FPGA提供立体视频信号源,FPGA作为信号处理的核心,采集、缓存和转换ARM输出的视频数据,以匹配线光源背照明式裸眼3D液晶屏物理结构实现立体显示效果。实验结果表明,系统准确地完成了左右格式立体视频数据分离和融合,能够满足嵌入式裸眼3D设备对视频信号转换的要求。FPGA逻辑设计只使用内部资源实现图像数据缓存和列插值,提高了系统的可靠性并降低了成本。     

裸眼3D技术嵌入式软件设计与研究

嵌入式设备是裸眼3D技术产业化的重要对象,其图像显示技术值得专门研究.应用Android SDK开发工具包及API和类库,在Eclipse集成开发环境下设计裸眼3D图像显示软件,完成自动识别屏幕分辨力、立体图像分辨力,使用低失真缩放与匹配技术完成立体图像融合,从而使双视图的立体图像在3D液晶显示屏上得到正确显示.     

基于微纳光子器件的光场裸眼3D显示技术

裸眼3D显示是"元宇宙"的入口,是可以重新定义人机交互方式的变革性技术.经过百余年发展,裸眼3D显示已取得显著进步,但仍然存在视场角小、分辨率下降严重、运动视差受限和视疲劳等问题.光场裸眼3D显示本质上是多视角光场调控技术和方法研究.最近研究表明,微纳光子器件(衍射光栅、衍射透镜、超表面等)对光的强度、相位、偏振等参量...     

裸眼3D显示设备关键指标测试方案的研究

为了制定裸眼3D关键指标的标准化测试方案,本文根据目前主流的自由立体显示和指向性背光技术的不同显示原理及其甜点的不同排列情况,分别设计了不同的测试方法,并对其进行串扰率、亮度、对比度、色温、色域等关键指标的完整测量与评价。测试结果表明,指向性背光式裸眼3D显示器的串扰率低达2.64%,远低于柱镜式(80.91%)和液晶光栅式(3.3%)裸眼3D显示器;亮度、色域、色温等指标上,指向性背光式显示也胜于柱镜式和液晶光栅式技术;而在对比度上,柱镜式裸眼3D显示凭借较佳的亮度,取得最优秀的数值,明显强于液晶光栅式和指向性背光技术。     

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.     

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.     

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.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.