Methods of Measurement for Eyes Crosstalk of 3D TV

针对3D电视双眼串扰测试中存在的问题,提出屏幕多点光色度探测方案及数据分析方案.对全画面3D电视双眼串扰测试进行研究,提出基于多点测量的3D电视双眼串扰测试方法,增强画面捕捉能力,提高串扰的测试精度和速度.通过测试与分析,证明了所提的测试方案可以定量描述3D电视的双眼串扰程度.     

影响3D电视图像舒适度的双眼串扰范围研究

本文主要研究了影响立体电视图像舒适度的主要因素,结合5点双眼串扰测试研究双眼串扰对立体电视舒适度的影响。通过30名观看者对具有不同串扰值的立体电视机的主观测试及实验数据分析,给出了影响3D电视图像舒适度的双眼串扰范围。实验结果对评价3D电视图像舒适度提供了依据,也对今后的研究具有指导意义。     

一种可预测TFT-LCD垂直串扰水平的定量分析方法

电容耦合和TFT漏电引起的垂直串扰问题在高分辨率液晶显示器产品上变得较为突出,大大影响了产品良率。业内通常采用VESA 2.0标准利用窗口画面测试串扰水平,但目前还没有一种预测串扰水平的定量分析方法。本文从垂直串扰形成机理出发,提出了一种可预测垂直串扰水平的定量分析方法,可预测出不同模式产品垂直串扰最严重的画面,有利于我们更好地研究和分析产品的品质。首先,通过分析垂直串扰机理,得到了垂直串扰现象与源电压差之间的定性对应关系。然后,通过分析V-T曲线,得到窗口画面下的亮度变化与源电压差之间的定量关系|ΔL|=kα|ΔV|。通过PCB板上的输出节点可以得到各灰阶对应的正负源电压,依据灰阶画面对应的源电压找到V-T曲线上对应的点可求出对应的斜率k值,依据漏电机理可求出对应的源电压差值|ΔV|,|ΔV|变化不大时可认为漏电电压降系数α为定值,故可计算出不同灰阶背景画面在窗口画面影响下的亮度变化值|ΔL|,将|ΔL|除以V-T曲线上对应灰阶的亮度值即可得到串扰值,通过比较不同窗口画面的串扰计算值即可得出串扰最严重的画面。最后,采用VESA 2.0标准方法测试不同窗口画面下的垂直串扰水平,与此方法的计算结果进行比较,串扰变化趋势吻合较好,TN和ADS模式下的线性相关系数分别达0.98和0.93以上。结果表明,此方法可以用来定量地研究产品垂直串扰的问题。     

眼镜式3D显示设备综合性能测试方案的研究

为了更系统、科学地评价眼镜式立体设备的显示质量,本文对目前主流的眼镜式3D显示器进行串扰率、亮度、对比度、色温、色域的测量。首先,根据眼镜式立体设备的成像原理设计相关的测试方案。测试结果表明,色分式3D显示器左眼串扰为3%,右眼为9%,偏振式3D显示器水平方向串扰最低为1.79%,垂直方向串扰呈振荡分布,时分式3D显示器的串扰最低,达0.37%;眼镜式3D显示器的亮度在3D模式下均发生较大程度的下降,其中时分式3D显示器在3D模式下亮度仅为6.97cd/m2,其对比度也随之发生大幅下降;色域方面,时分式显示器在3D模式下色域覆盖率为72.7%,相比2D模式存在明显下降,而色分式3D显示器在3D模式下的色域覆盖率最小,仅为0.3%。上述数据可为设备的选择和产品性能的优化提供有益参考作用。     

日本3D电视机的高画质化竞争动向

1前言2010年,在3D数字电影兴起的推动下,国外电视广播界的3D立体电视热也有飞腾升空之势。目前,国外3D电视机仍是沿用3D电影的双眼式,即利用特殊眼镜观看的制式,虽然它还存在左右画面串扰和亮度的缺欠问题,但市场仍旧看好。目前,日本3D业界正在开展着以开拓市场为目的的高画质化竞争。为供国内同行     

狭缝光栅开口率与裸眼3D显示串扰之间的关系

研究了狭缝光栅开口率和3D串扰之间的关系。先采用固定式的狭缝光栅显示器件进行实验,发现2%～4%光栅开口率的增加导致了0.2%～2%串扰的增加,初步验证了"光栅开口率越高,3D串扰越大"的规律。考虑到2D显示产品的个体性能差异以及在贴合过程中的操作误差都可能对这个结果产生影响,又用TN盒制作成活动式狭缝光栅,通过改变电压来改变狭缝光栅的开口率,从而在其他条件都一致的情况下,测试出狭缝光栅透过率和3D串扰之间的关系。对于2视点的裸眼3D设备,随着控制电压从4V增大到15V,串扰逐步减小了1.6%,从而最终确认了"开口率越高,3D串扰越大"的规律。     

LG LW6500

咨询电话：400-819—9999 田址：www．19．com／cn LG在CES2011上发布了全新系列“3D无闪烁”电视,该系列包括65英寸LED背光3D电视LW6500,该款号称“3D无闪烁”的电视,采用了LG的Film-type Patterned Retarder（FPR）薄膜偏振3D面板,只需要配合廉价、轻量化的偏振眼镜,就能观看到“无闪烁”的3D影像,有效减少传统快门式3D电视画面串扰祀图片闪烁的问题。而且由于采用偏振技术,所以佩带3D眼镜观看的时候不会有角度要求,能让观看者的观看位置更自由。     

机载线缆间的串扰耦合分析

串扰是机载设备间互联线缆干扰耦合的重要因素。以混合模S参数为基础,建立单线-双绞线模型以模拟机载设备之间的动力线缆对信号线产生的串扰耦合。在此模型基础上提出串扰耦合测试方案,搭建串扰耦合测试系统,并根据测试获得的耦合系数评估单线-双绞线线间串扰耦合强弱。通过测试比较,对影响因素进行分析,结果表明,距地高度对线间串扰影响不大,线间距对线间串扰耦合影响显著,因此在条件允许下尽可能增加设备间互联线缆的间距可有效抑制串扰耦合。     

高精度光纤陀螺检测电路串扰自检测研究

光纤陀螺检测电路应用过程中,受到自检测方案的影响,导致串扰故障检测所需测试矢量较多。因此,提出高精度光纤陀螺检测电路串扰自检测研究。分析光纤陀螺数字闭环检测原理,并提取检测电路串扰特征。根据闭环电路的连续信号微分方程,计算等效模拟输入转速。结合数字阶梯波算法,设计电路串扰检测方案。再计算地球自转角速率的分量测量死区,得到电路串扰测量结果。仿真结果表明：所提出的串扰自检测方法,与嵌入式“反射器”的新型谐振陀螺仪和多导体传输线串扰不确定性问题的计算方法相比,当串扰故障覆盖率为80%,本文方法的矢量数量为46个,降低了自测试所需的成本。     

综合布线系统的设计、施工及测试

针对综合布线系统工程设计与施工中存在的问题作一简单的归纳，并提出相应的解决办法。其中解决的办法包括几点重要的内容：设计时注意用户的需求和系统的可扩展性，施工时严格按照规范施工，工程结束后要做出详细的测试方案。接地问题和线缆敷设管路的弯曲问题是在施工时很重要的。测试时应测试的内容有：远端串扰、近端串扰、综合近端串扰、结构回波损耗等。     

数字电视图像清晰度

导出了以电视线表示的数字电视图像清晰度计算方法及其理论值，指出基于电子束扫描的CRT电视显像管与LCD，PDP，DLP，LCoS和OLED等固有分辨力显示器（屏）所显示图像的清晰度之间有很大不同，而测定电视图像清晰度不仅要合理设计和精确生成清晰度测试图，而且必须在规范的测试条件下采用正确的方法，并对测试数据进行处理。     

Depth of vision-3-D TV

Three-dimensional television (3D TV) outperforms conventional TV for many applications. Its growth has been slower than many predicted, but current technology advances could make 3D TV much more common in the near future. The author looks at how the picture is displayed, the cameras that are used, applications for 3D TV, and recent advances     

Synchronous 2D/3D Switching System for Service‐Compatible 3DTV Broadcasting

This paper proposes a new broadcasting system for the service‐compatible 3DTV in which the 3D service can coexist with the conventional digital TV broadcast. In the proposed system, the commercial 3DTV service can be implemented via the existing DTV channel without utilizing the dedicated 3DTV system. This 2D/3D system interworks with the conventional system and can switch to 2D or 3D service according to the broadcast programming and schedule. The system also provides a mechanism that can prevent the synchronization mismatch between left and right video streams and between the stream and the associated signaling in the 2D/3D transition periods. The picture quality measurements are carried out based on the ITU‐R recommended test to check the level of quality of service provided by the proposed scheme. The conformity tests are also performed with the conventional channel and the receiver for the DTV system to confirm the feasibility of the proposed one for the commercial service.     

Repair the faulty TSVs with the improved FNS-CAC codec

Through-silicon via (TSV) is a key enabling technology for the emerging 3-dimension (3D) integrated circuits (ICs). However, the crosstalk between the neighboring TSVs is one of the important sources of the soft faults. To suppress the crosstalk, the Fibonacci-numeral-system-based crosstalk avoidance code ( FNS-CAC) is an effective scheme. Meanwhile, the self-repair schemes are often used to deal with the hard faults, but the repaired results may change the mapping between signals to TSVs, thus may reduce the crosstalk suppression ability of FNS-CAC. A TSV self-repair technique with an improved FNS-CAC codec is proposed in this work. The codec is designed based on the improved Fibonacci numeral system (FNS) adders, which are adaptive to the health states of TSVs. The proposed self-repair technique is able to suppress the crosstalk and repair the faulty TSVs simultaneously. The simulation and analysis results show that the proposed scheme keeps the crosstalk suppression ability of the original FNS-CAC, and it has higher reparability than the local self-repair schemes, such as the signal-switching-based and the signal-shifting-based counterparts.     

Joint video coding of MPEG-2 video programs for digitalbroadcasting services

In digital broadcasting services such as digital satellite TV, cable TV, and digital terrestrial TV, several video programs are compressed by MPEG-2 and then simultaneously transmitted over a conventional CBR (constant bit rate) broadcasting channel. In this environment, the picture quality of the aggregated video programs should be kept as equal as possible to provide fair video services for all the viewers. We propose a joint video coding scheme for ensuring that the picture quality of all the programs are nearly the same. This objective is achieved by simultaneously controlling the video encoders to generate the VBR (variable bit rate) compressed video streams. This paper contributes in two ways. First, we propose a rate-distortion estimation method for MPEG-2 video, which enables us to predict the amount of bits and the distortion generated from an encoded picture at a given quantization step size and vice versa. The most attractive features of the proposed estimation method are its accuracy and a computational complexity low enough to be applied to real-time video coding applications. Second, this paper presents an efficient and accurate joint video coding scheme using the rate-distortion estimation results. The experimental results show that our coding scheme gives a higher and more stable picture quality and a more efficient channel utilization than an independent coding scheme that encodes each program independently     

RF Pulse Measurement Techniques and Picture Quality

One of the most critical performance characteristics of the TV antenna system is its ability to transmit "ghost-free" pictures. It has been shown that the amount of reflection from the antenna can be correlated to picture quality. How the vestigial sideband RF pulse technique, developed by RCA, more closely simulates TV operation than any other method is discussed. The selection of optimal RE pulse-widths to best reflect correlation with picture quality is discussed. Two RP pulsewidths, one of long duration (up to 2,?s) and the other of shorter duration (0.25, ?s), are recommended for use in antenna test measurements. The RF pulse testing procedure can also be used for measuring the color performance of antenna systems.     

IEEE Standard 1500 Compatible Oscillation Ring Test Methodology for Interconnect Delay and Crosstalk Detection

A novel oscillation ring (OR) test scheme and architecture for testing interconnects in SOC is proposed and demonstrated. In addition to stuck-at and open faults, this scheme can also detect delay faults and crosstalk glitches, which are otherwise very difficult to be tested under the traditional test schemes. IEEE Std. 1500 wrapper cells are modified to accommodate the test scheme. An efficient algorithm is proposed to construct ORs for SOC based on a graph model. Experimental results on MCNC benchmark circuits have been included to show the effectiveness of the algorithm. In all experiments, the scheme achieves 100% fault coverage with a small number of tests.     

液晶电视3D显示技术的探讨与设计

随着3D显示技术的飞快发展和产品线的逐渐成熟,家用3D电视已经逐步取代普通的2D电视成为广大消费者的首要选择,在种类繁多的显示系统中,快门式3D液晶显示系统以其立体效果突出、画面分辨率高、液晶模组成本低等优势得到了市场的广泛认可。本文主要研究快门3D液晶电视背光源设计和驱动,包括电源设计、软件控制和LED光源的控制三大部分,其中硬件设计包括升压模块的设计和恒流源的设计,软件控制包含背光灯条电流、占空比以及时序的控制。3D LED串并联通过调节各个灯条的亮度、延时以及电压大小实现对LED背光扫描时序的控制。     

3D电视行业的发展现状与前景分析

3D电视是近年来的一个新的技术亮点和产业热点,主要从3D电视的拍摄、3D节目制作、3D节目传输、3D终端显示等方面介绍了3D电视行业的发展现状,并对3D电视的发展前景进行分析。     

我国3D电视产业发展现状研究

近年来,3D电视逐渐成为彩电业发展的热点,国内外彩电企业争相发展3D电视。详细介绍了国内外彩电企业的3D电视发展情况,对当前国内3D电视产业发展中存在的问题进行了详细分析,并提出符合中国3D电视产业发展特点的措施和建议。