Electric lamp and discharge devices – With luminescent solid or liquid material – Vacuum-type tube
Patent
1997-03-26
2000-07-18
Day, Michael H.
Electric lamp and discharge devices
With luminescent solid or liquid material
Vacuum-type tube
313292, 313269, 313517, H01J 3115
Patent
active
06091193&
ABSTRACT:
A mesh grid for a fluorescent display tube capable of effectively preventing a deformed mesh from being in contact with fluorescent substance without disturbing indications on an anode display unit. The mesh grid is mounted over an anode substrate with adhesive. A mesh of the mesh grid is disposed over the anode display unit including a plurality of anode segments. The mesh is formed in a hexagonal pattern. On the mesh, protruding portions directed to the anode display unit are formed. The protruding portions are disposed at positions opposing the anode display unit but not opposing each of the anode segments. The protruding portions are formed by pressing the mesh toward the anode display unit with each intersection of fine wires in a hexagonal pattern. If the mesh grid is deformed toward the anode substrate due to heat or the like, the protruding portions come into contact with the anode substrate, thereby preventing a portion of the mesh provided with no protruding portion from being in contact with fluorescent substance.
REFERENCES:
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patent: 4164683 (1979-08-01), Nakamura et al.
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patent: 4298823 (1981-11-01), Kawasaki et al.
patent: 4472658 (1984-09-01), Morimoto et al.
patent: 5568012 (1996-10-01), Mohri et al.
Kuwamoto Michio
Yamaguchi Teruo
Day Michael H.
Futaba Denshi Kogyo K.K.
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