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为了满足对大屏幕电视日益增长的需求以及引进高质量的电视系统,例如 EDTV,研制了33英寸大屏幕彩色显像管。高性能的彩色显像管使用下列新技术来制成,即,日立公司研制的特殊动态聚焦工作的 EA-DF 电子枪,Fe—Ni 合金(殷钢)制造的低热膨胀荫罩等,以改进图像质量。与过去管种相比,使用 EA—DF 电子枪后,屏幕中心的束点直径减小15%,而在屏四角减小30%。使用殷钢制造的低热膨胀荫罩可使电输入(阳极电压×阳极电流)增加约20%,以得到更高的亮度。从人机工程考虑,进行了抗静电和防眩处理。
To meet the growing demand for large-screen TVs and the introduction of high-quality television systems such as EDTV, a 33-inch large screen color picture tube was developed. High-performance color picture tubes were made using the new technology, EA-DF electron guns developed by Hitachi for special dynamic focusing work, and low thermal expansion masks made of Fe-Ni alloy (Invar) to improve image quality. Compared with the past, with the EA-DF gun, the center of the screen beam diameter reduced by 15%, and 30% reduction in the screen four corners. The low thermal expansion mask made with Invar increases the electrical input (anode voltage × anode current) by about 20% for higher brightness. From the ergonomic considerations, anti-static and anti-glare treatment.