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    • 4. 发明专利
    • FLUORESCENT LAMP
    • JPH0197367A
    • 1989-04-14
    • JP25364187
    • 1987-10-09
    • HITACHI LTD
    • NAKANO MASAKIONO YUKIO
    • H01J61/35H01J61/44
    • PURPOSE:To correct color errors in a yellowish green direction and to improve a color rendering evaluation value by slightly adding alkali earth metal halo phosphate phosphor with divalent europium being blue phosphor to titanium oxide to be applied to a frist layer. CONSTITUTION:Titanium oxide of 0.06mu is applied and adhered as a first layer to the inner face of FL40S glass tube by + or -0.1g/pc., and then it is baked at a specified temperature. Next, phosphor coat, where active ortophospate strontium magnesium 47wt.% with orange phosphor tin, active boron phosphate strontium 52wt.% with blue-green phosphor divalent europium and active siliconate zinc 1% with green phosphor mangan are blended, is applied to a glass tube where a first layer is coated with titane oxide by 6.0+ or -0.5g/pc. It is thus possible to correct color errors in a yellowish green direction and to improve a color rendering evaluation value.