公开(公告)号：US5115306A

公开(公告)日：1992-05-19

申请号：US887950

申请日：1986-05-29

申请人： Nobuyuki Tsuda ,  Masaaki Tamatani ,  Fukaya Ajiro ,  Nagai Hitosi

发明人： Nobuyuki Tsuda ,  Masaaki Tamatani ,  Fukaya Ajiro ,  Nagai Hitosi

IPC分类号： H01J9/22 ,  C09K11/08 ,  C09K11/77 ,  C09K11/86 ,  H01J29/20 ,  H01J29/22

CPC分类号： C09K11/777 ,  H01J29/20 ,  H01J29/22

摘要： A projection cathode-ray tube for a projection video apparatus, comprising a green-emitting screen including a terbium-activated lanthanum oxychloride phosphor. The disclosed phosphor exhibits a luminance maximum at a minimum beam size, a property advantageous for producing a high-resolution image. The phosphor is chemically stable at high temperatures. The phosphor shows no substantial decrease in emission efficiency even at about 80.degree. C., and the emission luminance is twofold that of the prior art. The green-emitting screen is made by the steps of: (a) settling the terbium-activated lanthanum oxychloride phosphor onto the inner surface of a cathode-ray tube, wherein the phosphor is settled from a suspension comprising a solution of potassium water glass and barium nitrate, and wherein the ratio of the weight concentration of potassium water glass to barium nitrate is in the range between about 20 to about 35; and (b) removing the resulting supernatant.

摘要翻译： 一种用于投影视频设备的投影阴极射线管，包括具有铽激活的氯氧化镧荧光体的绿色发光屏。 所公开的荧光体以最小光束尺寸显示亮度最大值，这对于产生高分辨率图像是有利的。 磷光体在高温下是化学稳定的。 荧光体即使在约80℃也不显着地降低发光效率，发光亮度与现有技术的发光亮度相差两倍。 绿色荧光屏由以下步骤制成：（a）将铽激活的氯氧化镧荧光粉沉淀到阴极射线管的内表面上，其中荧光体由包含钾水玻璃溶液和 硝酸钡，并且其中钾水玻璃与硝酸钡的重量浓度之比在约20至约35之间; 和（b）除去所得上清液。