Vacuum fluorescent display apparatus having barium absorbent
AssigneesNoritake Itron Corporation, Noritake Co., Limited
InventorKoji Kato
Life of this patent
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Abstract
A vacuum fluorescent display apparatus comprising a filament cathode (10) and an anode (7); the filament cathode being arranged in a vacuum container, and used for releasing low-energy electrons; the anode having a phosphor (8) adhering thereto, and being struck by the low-energy electrons and thereby caused to emit light; wherein a structural body (9) is provided to a region in which the low-energy electrons released by the cathode can be controlled; the structural body having an electrically conductive or semi-conductive metal oxide formed at a portion that is bombarded by low-energy electrons.
Claims10
A vacuum fluorescent display apparatus comprising a filament cathode and an anode;
- the filament cathode having a BaO, and being arranged in a vacuum container, and used for releasing low-energy electrons;
- the anode having a phosphor adhered thereto, and being struck by the low-energy electrons and thereby caused to emit light;
- the vacuum fluorescent display apparatus characterized in having:
- a structural body configured from a metallic material, and provided to a region in which the low-energy electrons released from the cathode can be controlled and the region is bombarded by the low-energy electrons;
- the structural body having an electrically conductive or semi-conductive metal oxide formed on a surface of the metallic material at a portion that is bombarded by the low-energy electrons;
- the metal oxide being a metal oxide that readily forms a compound with barium released from the filament cathode.
Dependencies are inferred from the claim text.