The super slim cpt deals with two problems , one is to extend the deflection angle of electron beam and another is to minimize the length of glass shell , especially the length of funnel 摘要彩色显像管的超薄型化涉及到两方面的问题，其一是扩大电子束的偏转角，其二是减小玻壳的长度，尤其是锥体玻壳的长度。
Bmcc ( beijing matrushita color ltd . company ) , a producer and seller of color picture tube ( cpt ) products , is a sino - japanese joint venture run by the beijing government and matrushita electronic ltd . company 北京松下彩色显象管有限公司（ bmcc ）系北京市与松下电器合作经营的中日合资企业，生产和销售彩色显像管。
Lg - shuguang electronic company co . , ltd ( lgesg ) is a jointed adventure company by china and korean , founded in aug . 1994 . the main product is color picture tube ( cpt ) and color display tube ( cdt ) 乐金曙光电子有限公司(以下简称lg曙光)是一家为中韩合资的大型电子企业,成立于1994年8月,主要生产彩色显像管( cpt )和彩色显示管( cdt ) 。
The shadow mask is the critical component of the colour picture tube and the important component for the choice of colour , its function concentrates on the limitation of electronics bound diameter and the screening direction , the electronics bound which is sent by the electronics gun goes scanning , during the scanning process , we should guarantee every bound gathering into the small holes situated on the screen , then these bounds will point to the regularized position through the small holes on the flat mask , and then three basic colours will be produced , at the same time , those useless electronics will be blocked by the mask board 平板荫罩是彩色显像管的关键部件之一，是一个重要选色元件，其作用是限制电子束直径和上屏方向，由电子枪发射的电子束在偏转磁场的作用下进行扫描，扫描过程中必须使每个电子束只能射中荧光屏上的为该束指定的那些小孔上会聚，并通过荫罩上诸多的小孔分别打到各自对应的荧光质点上，发出三种基色（红，绿，蓝） ，而无用的电子则被荫罩板截获。
In order to be the choice of hdtv , different kinds of displays develop much fast in the recent years . the dissertation introduces the development of all kinds of display , and gets the conclusion that , cpt still has the great advantage in the tv terminal field under the condition that the lcd is taking the place of cpt in the cdt field . the main research contents of cpt which includes high - luminance , high - contrast , high - definition , low - power , and complanation , have been investigated 本文系统地阐述了hdtv用的显示器件的基本要求及其发展历史和现状，介绍了各类显示器件欲成为hdtv终端显示近年来所作的努力；总结出了虽然在彩色显示器( cdt )领域，液晶显示器( lcd )已经大有取而代之之势，但是在电视终端领域，彩色显像管( cpt )还是有其不可替代的巨大优势；并分析了高亮度、高对比度、高分辨率、低功耗、平面化等cpt制造的关键技术和研究动向。
