Multi color luminous fluorescent display device

Details Multi color luminous fluorescent display device Multi color luminous fluorescent display device

2005-06-03

2008-11-04

Patel, Vip (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

C313S496000

Reexamination Certificate

active

07446465

ABSTRACT:
A multi-color luminous fluorescent display device includes therein a vacuum-sealed vessel having a glass substrate, an anode disposed on the glass substrate, a cathode installed in the vacuum-sealed vessel, a first phosphorescent layer containing a phosphor emitting yellow to red light, and a second phosphorescent layer containing a phosphor emitting blue to green light. The first phosphorescent layer contains a Ln2O2S:Eu phosphor (Ln is at least one selected from a group consisting of La, Gd, Lu and Y) which emits yellow to red light, and the second phosphorescent layer contains at least one phosphor selected from ZnO:Zn phosphor, ZnGa2O4phosphor and ZnGa2O4:Mn phosphor which emit blue to green light.

REFERENCES:
patent: 4218636 (1980-08-01), Miyazawa
patent: 1550885 (2005-07-01), None
patent: 54-107483 (1979-08-01), None
patent: 98/22849 (1998-05-01), None

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