EP0185115A1
Expired / Lapsed
EP
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Gas-discharge display device
Assignee: Hitachi Ltd
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Filing: 1984-12-21
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Granted: —
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Expires: 2004-12-21
Abstract
Abstract @ in a gas-discharge display device, a plurality of parallel cathodes (40) connected to cathode terminals (Kφ<sub>1</sub> to Kφ<sub>4</sub>) by multiphase connection (41) are disposed in equally spaced apart relation on one surface of a substrate (10), while a plurality of parallel and equally spaced-apart anodes (70) are disposed on the rear surface of a face plate (60) in a relation crossing with the cathodes, and the fact plate is superposed on the subsrate through barrier ribs (50) defining a discharge space (110). In the display device, time-serial multiphase pulse voltage trains are applied to the individual cathodes respectively, while a train of pulses of large width corresponding to display information is applied to each of the anodes in a relation superposed on a train of pulses of small width used for initiation of an auxiliary discharge.
Inventors
- 👤 Yukio Okamoto
- 👤 Shinichi Shinada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 15:39
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/492; H01J17/494
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
A gas-discharge display device comprising: a plurality of cathodes (40) disposed on a substrate (10) to extend in one direction in a relation parallel to and equally spaced apart from each other, said cathodes being connected to respective cathode terminals (Kφ 1 to Kφ 4 ) by multiphase connection (41); a plurality of barrier ribs (50) disposed above said cathodes to extend in a direction crossing with the extending direction of said cathodes and in a relation parallel to and equally spaced apart from each other; a plurality of anodes (70) disposed in a relation parallel to and equally spaced apart from each other so as to be located between said barrier ribs, said anodes being connected to respective anode terminals (A); and a face plate (60) disposed on said anodes, said face plate and said substrate defining therebetween a space which is filled with a gas and maintained gas-tight.
Claim 2
Dependent Claim
150 words
A gas-discharge display device comprising: a plurality of cathodes (40) disposed on a substrate (10) to extend in one direction in a relation parallel to and equally spaced apart from each other, said cathodes being connected to respective cathode terminals (Kφ 1 to Kφ 4 ) by multiphase connection (41); a plurality of barrier ribs (50) disposed above said cathodes to extend in a direction crossing with the extending direction of said cathodes and in a relation parallel to and equally spaced apart from each other; a plurality of anodes (70) disposed in a relation parallel to and equally spaced apart from each other so as to be located between said barrier ribs, said anodes being connected to respective anode terminals (A); and a face plate (60) disposed on said anodes, said face plate and said substrate defining therebetween a space which is filled with a gas and maintained gas-tight.
Claim 3
Dependent Claim
24 words
A gas-discharge display device as claimed in Claim 1, wherein a dielectric layer (30) is provided to fill the gap between said cathodes (40).
Claim 4
Dependent Claim
34 words
A gas-discharge display device as claimed in Claim 1, wherein a black film (90) is provided on said face plate (60) except the display part (80) so as to improve the contrast of display.
Claim 5
Dependent Claim
26 words
A gas-discharge display device as claimed in Claim 1, wherein phosphors for color dislay are coated on the display part (80) of said face plate (60).
Claim 6
Dependent Claim
29 words
A gas-discharge display device as claimed in Claim 1, wherein a total reflection film for reflecting incident external light is provided on the surface of said face plate (60).
Claim 7
Dependent Claim
70 words
A gas-discharge display device as claimed in Claim 1, wherein time-serial multiphase pulse voltages are applied to respective said cathode terminals, (Kφ 1 to Kφ 4 ), and a pulse voltage including pulses of small width occuring at a timing corresponding to that of said multiphase pulse voltages and pulses of large width representing display information superposed on said small width pulses is applied to each of said anode terminals.
Claim 8
Dependent Claim
41 words
A gas-discharge display device as claimed in Claim 6, wherein each of the pulses of large width included in said pulse voltage indicative of information to be displayed is in the form of a pulse train of pulses of small width.
References Cited (Backward Citations)
US3689910A
Cited
US4206386A
Cited
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