25英寸700线彩色显像管偏转线圈的优化设计

在组合法计算彩色显像管偏转系统的基础上，对２５英寸７００线彩色显像管所用偏转线圈进行了优化设计。选取劳光屏光栅结点上像差作为优化目标函数，选取线圈调制极上绕线密度的傅里叶展开系数作为优化参数，采用分步阻尼法优化设计出２５英寸７００线彩色显和偏转线圈。     

内偏转彩色显像管

对内偏转彩色显像管技术进行了详细论述。分析了材料的真空放气特性对阴极寿命的影响。由于偏转线圈放在管内，不能用传统的管球与线圈装配程序进行装配。为了得到好的着屏和会聚质量，设计了特殊的装配步骤。给出了１４英寸和２１英寸电视机（ＴＶＴｓ）用以及２１英寸彩色监视器（ＣＭＴｓ）用内偏转管的分析测试结果。     

内偏转彩色显像管

对内偏转彩色显像管技术进行了详细论述。分析了材料的真空放气特性对阴极寿命的影响。由于偏转线圈放在管内 ,不能用传统的管球与线圈装配程序进行装配。为了得到好的着屏和会聚质量 ,设计了特殊的装配步骤。给出了 14英寸和 2 1英寸电视机 (TVTs)用以及 2 1英寸彩色监视器 (CMTs)用内偏转管的分析测试结果。     

改进清晰度彩色显像管中平板荫罩的设计

为了提高清晰度 ,提出了改进彩色显像管平板荫罩的设计方法 ,对原有 2 5英寸彩色显像管的平板荫罩重新进行了计算。根据计算结果制作了新的平板荫罩 ,经装管测试 ,其分辨率从原来的 50 0多线提高到 70 0线 ,观察不到莫尔效应 ,图像品位良好。     

改进清晰度彩色显像管中平板荫罩的设计

为了提高清晰度,提出了改进彩色显像管平板荫罩的设计方法,对原有２５英寸彩色显像管的平板荫罩重新地计算。根据计算结果制作了新的平板荫罩,经装管测试,其分辨率从原来的５００多线提高到７００线,观察不到其莫尔效应,图像品位良好。     

彩色显像管静会聚漂移问题的研究

在采用传统精密一字形电子枪的彩色显像管中，若聚焦电压发生变化，静会聚将产生漂移。如果聚焦电压变化700V，那么21英寸彩管将有大约0．3mm的静会聚漂移。由于静会聚漂移值超过荧光粉节距的50％，所以，静会聚漂移对彩色显像管的分辨率影响很大（若彩色显示管有更精细的荧光粉节距和更高的分辨率，对其影响更大），在高质量彩管设计中必须克服静会聚漂移。对此讨论了产生静会聚漂移的原因，提出了一种克服静会聚漂移的电子枪，并通过数值计算获得了较理想的结果。如果聚焦电压变化700V，采用新枪的21英寸彩管的静会聚漂移仅0．006mm，与原枪相比，屏上电子束斑变化很小。     

有限元法在玻壳应力分布计算中的应用

利用有限元法模拟了35英寸110°彩色显像管玻壳的应力分析，得到了玻壳表面的应力分布。玻壳表面上最大的张应力植出现在CPT对称面的周边上。分析结果对显像管生产工艺起到了积极的指导作用．并且大大节省了时间和费用。     

现代家庭影院中的大屏幕显示器

随着人们生活水平的提高,居住条件的不断改善,艺术欣赏水平也在不断提高,在布置家庭影院的过程中越来越追求影院的真实感和临场感。作为家庭影院的显示器部分过去常常用29英寸或34英寸彩电,通过长时间使用越来越感到其表现力捉襟见肘,不能满足人们特别是发烧友的需要,从而转向大屏幕显示器。由于彩色显像管制造工艺上的限制,目前最多只能生产出38英寸的彩管,也只有索尼等     

19英寸显示器110°矩形偏转线圈的设计

设计了用于 19英寸显示器、具有 110°偏转角的一种新型的矩形偏转线圈。这种矩形偏转线圈可节省偏转能量 ,提高偏转灵敏度。由于采用了一种简单新颖的设计方法 ,不仅避免了复杂的三维电磁场计算和优化 ,而且还可利用现有的旋转对称偏转线圈的计算结果 ,因此可节省大量的时间。文中给出了相应的设计结果。结果表明 ,采用该方法所设计的新型矩形偏转线圈具有很好的偏转性能 ,进一步证明了所用方法是一种行之有效的方法。该方法不仅可用于非旋转对称矩形线圈的设计 ,而且还可用于其它的电磁场问题。     

彩电屏幕标注尺寸为何与实际不符?

市场上销售的74厘米(29英寸)彩电对角线的实际屏幕尺寸只有68厘米(27英寸),64厘米(25英时)彩电对角线的实际屏幕尺寸只有59厘米(23英寸),54厘米(21英寸)彩电对角线的实际尺寸只有51厘米(20英寸)。彩电名义尺寸与屏幕有效画面尺寸不同的原因是彩色显像管型号的不同命名法造成的。我国彩色显像管尺寸按彩管对角线最大外形尺寸标注,包括了玻壳尺寸,而不是按有效屏幕对角线实际尺寸标定。现将国际彩管型号命名法和国内彩管型号命名法介绍给大家,供参考。国际统一命名法:①字母②数字③字母④数字⑤字母④数字。第①部分:用一个字母、表示彩管用途,如电视用彩管用A表示,监示器用彩管用M表示,宽屏幕彩管用W表示。第②部分:二个数字表示荧光屏最小有效屏幕画面对角线尺寸,以cm计量。四舍五入取整数。第③部分:用三个字母(不使用I和O)组成。表示种类特征。其中第一个字母表示国别,后面按拉丁文顺序排列。第④部分:由二个数字表示某个系列管中的特定顺序号,单色管由一个数字组成。第⑤部分:采用字母表示荧光膜用荧光粉特性。对彩色电视机用彩色管,荧光粉用单一字母X表示。对黑白管用荧光粉     

Completely flat erosion magnetron sputtering using a rotating asymmetrical yoke magnet

A completely flat erosion magnetron 5-inch cathode has been developed for planer magnetron sputtering using a rotating asymmetrical yoke magnet. The yoke magnet was composed of an iron yoke base with a 70 mm diameter, an annular outer yoke, a center Fe-Nd-B magnet which was shifted from the yoke base center, and an assisted Fe-Nd-B magnet which was attached to a part of the outer yoke. In order to optimize the magnetic flux density for uniform target erosion from center to outer area, several diameters of the center Fe-Nd-B magnet, from 25 to 36 mm, were tested by the first experiment, and secondly the outer yoke structure was optimized using the first experimental results. The obtained final target utilization was 77% and erosion depth uniformity for the 4-inch diameter was ±6%.     

Completely flat erosion magnetron sputtering using a rotating asymmetrical yoke magnet

A completely flat erosion magnetron 5-inch cathode has been developed for planer magnetron sputtering using a rotating asymmetrical yoke magnet. The yoke magnet was composed of an iron yoke base with a 70 mm diameter, an annular outer yoke, a center Fe-Nd-B magnet which was shifted from the yoke base center, and an assisted Fe-Nd-B magnet which was attached to a part of the outer yoke. In order to optimize the magnetic flux density for uniform target erosion from center to outer area, several diameters of the center Fe-Nd-B magnet, from 25 to 36 mm, were tested by the first experiment, and secondly the outer yoke structure was optimized using the first experimental results. The obtained final target utilization was 77% and erosion depth uniformity for the 4-inch diameter was ±6%.     

偏转磁芯中磁滞损耗的估测

通过空间磁场和感应电压的测量,对偏转磁芯中的磁通密度分布进行了计算,并根据磁滞损耗的经验公式对Philips17英寸CMT的磁滞损耗进行了估测。该方法适用于降低能量损耗的偏转系统磁芯结构的优化和磁性材料的选择等。     

在Excel中用VBA实现透镜设计软件的开发

本文首先介绍着屏的归一化处理.接着提出主透镜的曲面模型,并分析获取该曲面的条件.然后以纠正着屏偏差为目标论述如何在旧透镜的基础上获得了新的透镜曲面.扼要介绍了软件的组成和一些算法.通过实例验证本文的方法,阐述这种软件的现实意义.     

Improved power-series expansion method for the analysis of magneticdeflection yokes

We have proposed an improved power-series expansion method for the analysis of magnetic deflection yokes in a cathode-ray tube (CRT). The magnetic field is expanded to either of two different power-series formulations, depending on the radial position from the central axis of the deflection yoke. The coefficients of the power series are calculated by symbolically differentiating the magnetic field expressed by the surface magnetic charge method formulation. The boundary position for selecting either of the two formulations and the required highest order of the power series are determined by minimizing the summation of squared differences between the magnetic fields given by the proposed method and those given by the surface magnetic charge method at an off-center position. We compared the speed of the proposed method with the conventional surface magnetic charge method acid evaluated the picture quality on a screen. We found that the calculation time for the misconvergence was reduced to 1/63 that of the conventional method, with an accuracy of ±0.4 mm     

Target utilization of planar magnetron sputtering using a rotating tilted unbalanced yoke magnet

The dependence of the magnetic flux density, erosion uniformity, and target utilization on the yoke magnet tilt angle was investigated in a planar magnetron sputtering system, using a rotating, tilted, unbalanced, asymmetrical magnet. In these experiments, circular and elliptical outer yokes were used as the rotating yoke magnet. The magnetic flux density distributions were measured two-dimensionally on the target surface and compared with the erosion uniformity. As the yoke magnet tilt angle increased, the magnetic flux density distribution expanded and became more uniform, and the eroded areas expanded toward the outside of the target surface. With a circular outer yoke, as the yoke magnet tilt angle increased from 0° to 8°, utilization of a 5-inch target linearly increased from 60 to 80%. On the other hand, with an elliptical outer yoke, the utilization of the target was approximately 70%, regardless of the yoke magnet tilt angle. This is because, as the tilt angle is increased, the inner area of the target eroded more deeply, while the outer area eroded less deeply. The deposition rate when using the elliptical outer yoke was 1.2 times faster than that of when using the circular outer yoke at the same magnet tilt angle. By decreasing the magnetic flux density on the inner area of the target with an elliptical outer yoke magnet, a higher deposition rate may be obtained than is observed with a circular magnet, and target utilization of over 70% can be achieved.     

偏转磁芯铁氧体材料的磁滞损耗分析

对偏转磁芯所采用的铁氧体材料的磁滞损耗特性进行了分析,得出了磁滞损耗功率与频率、磁通密度和温度的经验公式。对磁滞回线中涡流的影响进行了分析,得出在目前应用的偏转频率下,磁芯损耗中磁滞损耗占主要部分。根据经验公式,对计算磁滞损耗的方法和在计算温度分布中的应用进行了介绍。     

多极偏转场对电子束散焦的影响分析

应用多极场理论对彩色显像管中偏转散焦进行了分析 ,结果表明 ,多极场展开式中的四极场分量是影响偏转散焦的主要因素 ,对三束的分析应分别考虑电子束在偏转场中的位置。对实际偏转系统的分析还应考虑高次谐波的影响     

Improved wide erosion nickel magnetron sputtering using an eccentrically rotating tilted center magnet

A wider eroded and higher target utilized magnetron sputtering system for ferromagnetic nickel (Ni) target was developed using a large, tall and eccentrically rotating tilted center magnet. In this system, a tilted center magnet optimized the magnetic field strength between the inner and outer erosion areas by adjusting the tilt angle, and target utilization is found to be higher up to 49% for 5-inch and 4-mm thick Ni target, which is 8% better than when a non-tilted center magnet was used. Moreover, the center non-eroded area was decreased.Furthermore, the rotating mechanism of a yoke magnet could be separated from the cooling water and the target could be cooled more effectively because the water cooling unit was attached not only to the outer area of target, but also to the tilted space of the center magnet.