Title:
FLUORESCENT CHARACTER DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2639305
Kind Code:
B2
Abstract:
PURPOSE: To prevent the erroneous luminescence of a nonselection section by adding at least one or more dummy linear grids on both outsides of a phosphor dot group in a fluorescent character display device having a double matrix structure connected with display section anodes in odd lines and even lines.
CONSTITUTION: An anode electrode 2 made of an aluminum thin film is formed on a glass substrate 1. A graphite layer 3 and a phosphor layer are formed on the anode 2. The phosphor layer is removed from a dummy anode 7. Grids 5 are suspended on the anode 2, and filaments 6 perpendicular to them are suspended. Dummy grids 8 are suspended on both sides of the dummy anode 7. Two grid voltage 4G, 5G are superposedly applied in sequence to odd line anodes P1A-P5A and even line anodes P1B-P5B in turn, and phosphors are illuminated by the thermoelectrons emitted from the filaments 6. The grid voltage 2G, 3G, (m-1)G, (m-2)g are kept at the same timing, thus no nonselection luminescence is generated.
Inventors:
KAMIOKA ATSUO
WAKABAYASHI TOSHIRO
WAKABAYASHI TOSHIRO
Application Number:
JP15046993A
Publication Date:
August 13, 1997
Filing Date:
June 22, 1993
Export Citation:
Assignee:
NIPPON DENKI KK
International Classes:
G09G3/30; H01J31/15; (IPC1-7): H01J31/15; G09G3/30
Domestic Patent References:
| JP4366890A | ||||
| JP298450U |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)