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    • 2. 发明授权
    • Bistable storage tube having storage dielectric of phosphor particles
coated with secondary emissive material
    • 具有涂覆有次发射材料的荧光体颗粒的储存电介质的双稳储存管
    • US3982150A
    • 1976-09-21
    • US458947
    • 1974-04-08
    • Ralph A. Mossman
    • Ralph A. Mossman
    • G01R13/22H01J9/20H01J29/10H01J29/18H01J29/39
    • G01R13/225H01J29/10H01J29/18H01J9/20
    • The present invention relates generally to charge image storage tubes having a direct viewing storage target including a storage dielectric of phosphor material capable of bistable storage of a charge image and which emits a light image corresponding to such charge image, and in particular to an improved storage dielectric of phosphor particles coated with smaller particles of a high secondary electron emissive material bonded to such phosphor particles and to a method of manufacture thereof. A small amount of secondary emissive material is employed efficiently to increase the writing speed and useful lifetime of the storage dielectric without greatly decreasing the brightness of the light image emitted by the phosphor. In one embodiment using 3.5 per cent of magnesium oxide secondary emissive material with 96.5 per cent of manganese activated zinc orthosilicate phosphor material, a writing speed of 400,000 centimeters per second and a light image brightness of 3.5 foot-lamberts was obtained. The method of manufacture of the improved storage dielectric includes coating the phosphor particles with a secondary emissive forming substance, and then heating the coated phosphor particles to produce the secondary emissive material and to simultaneously bond such secondary emissive material to the phosphor particles.
    • 本发明一般涉及具有直接观看存储目标的图像存储管,其包括能够双稳态地存储电荷图像的荧光体材料的存储电介质,并且发射与该电荷图像相对应的光图像,特别是改进的存储 涂覆有与这种荧光体颗粒结合的高二次电子发射材料的较小颗粒的荧光体颗粒的电介质及其制造方法。 有效地使用少量二次发射材料以增加存储电介质的写入速度和使用寿命,而不会大大降低由荧光体发射的光图像的亮度。 在一个实施方案中,使用3.5%的氧化镁二次发射材料,其具有96.5%的锰活化锌原硅酸盐荧光体材料,获得了每秒40万厘米的写入速度和3.5英尺兰伯的光图像亮度。 改进的存储电介质的制造方法包括用二次发射形成物质涂覆荧光体颗粒,然后加热涂覆的荧光体颗粒以产生二次发射材料并同时将这种二次发射材料粘合到荧光体颗粒上。