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    • 4. 发明授权
    • Low pressure mercury discharge fluorescent lamp utilizing multilayer
phosphor combination for white color illumination
    • 低压汞放电荧光灯采用多层荧光粉组合进行白色照明
    • US4847533A
    • 1989-07-11
    • US126317
    • 1987-11-30
    • Mary V. Hoffman
    • Mary V. Hoffman
    • C09K11/77H01J61/44H01J61/48
    • H01J61/44C09K11/7734H01J61/48
    • A low pressure mercury discharge fluorescent lamp is disclosed utilizing a particular phosphor blend deposited on a calcium haloapatite phosphor base layer to achieve white color lamp illumination efficiently with improved color rendition. The surface phosphor layer is a blended mixture of a first phosphor which is divalent europium barium and/or strontium magnesium aluminate having a hexagonal crystalline structure and which further includes coactivation by divalent manganese ion sufficient to produce substantial green color emission with a second phosphor which is trivalent europium activated rare earth oxide having a rare earth ion selected from yttrium, gadolinium and lutetium, including mixtures of these rare earth ions. The underlying calcium haloapatite layer also exhibits emission at approximately the same color point as achieved with the surface phosphor layer.
    • 公开了一种低压汞放电荧光灯,其利用沉积在钙卤磷灰石磷光体基底层上的特定荧光体掺合物,以有效改善色彩再现来实现白色灯照明。 表面荧光体层是具有六方晶结构的二价铕钡的第一荧光体和/或铝酸锶铝的混合混合物,并且还包括通过二次锰离子的共激活,以使第二荧光体产生实质的绿色发射,第二荧光体是 具有选自钇,钆和镥的稀土离子的三价铕活化稀土氧化物,包括这些稀土离子的混合物。 下面的钙卤代磷灰石层还表现出与表面荧光体层达到的大致相同色点的发射。