彩管荫罩热膨胀及其抑制方法研究  

Research on Suppressing Hot Doming of CRT Shadow Mask

作　　者：林砺宗[1] 颜晶[1] 朱震宇[1] 王俊[1] 

机构地区：[1]华东理工大学机械与动力工程学院,上海200237

出　　处：《中国材料科技与设备》2008年第3期86-88,107,共4页Chinese Materials Science Technology & Equipment

摘　　要：研究荫罩热拱起现象产生的机理，分析整体拱起、长时拱起、短时拱起以及局部拱起对色偏差的影响程度。采用荫罩内表面喷涂一定厚度的低熔点玻璃抑制荫罩的热拱起；指出由于不同的厚度会产生不同的残留张应力，必须采用合适的厚度使荫罩在不同环境下将Q值保持在正常范围内。文中提出了一套通过试验方法获得最佳厚度参数的工艺流程，并对25英寸彩色显象管荫罩进行试验研究，发现当荫罩金属板与涂层材料厚度比大于0．1时，抑制效果提高趋于缓慢。The paper studies the hot doming of CRT shadow mask and analyses different kinds of hot doming： entire doming, longtime doming, little doming, partial doming and their effects on the color-warp. Spray a thin folium of glass with low melting-point to suppress the hot doming. Point out a suitable thickness of glass folium should be reached to prevent the variance of the Q-value of masks in order to work in all environments. A program to get the best parameters of the folium by experiments was worked out and an application was carried out to 25-inches CRT shadow masks. It was found that the suppressing effect grows slowly with the thickness of the folium when the thickness-ratio of the glass folium to the mask membrane is greater than 0.1.

关 键 词：彩管 荫罩 热拱起 Q值 抑制 

分 类 号：TN94[电子电信—信号与信息处理]