US4881017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device with stretched electrode assemblies having different resonant frequencies
Assignee: FUTABA DENSHI KOGYO 629 OSHIBA MOBARA-SHI CHIBA-KEN JAPAN KK
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Filing: 1988-03-07
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Granted: 1989-11-14
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Expires: 2008-03-07
Abstract
Abstract A display device capable of preventing vibration of control electrodes stretched in an envelope. The control electrodes are divided into two assemblies or a main control electrode assembly and an auxiliary control electrode assembly arranged in contact with or in proximity to the main control electrode assembly so that vibrations of both control electrode assemblies may damp each other due to a difference between natural frequency therebetween, thereby restraining vibration of the control electrodes.
Inventors
- 👤 Yoshihisa Tsuruoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:36
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/126
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
117 words
A display device comprising: an envelope; at least two sets of electrode groups arranged in directions intersecting each other within said envelope, one of said electrode groups being stretched in a space within said envelope; said electrode group stretched in said space including a main electrode assembly wherein said main electrode is bifurcated and such that one of each of the auxiliary electrodes in the assembly is arranged so as to be in the gap of each of said main electrodes in the assembly; and a plurality of display sections defined at intersections between said two sets of electrode groups, said display sections being selectively driven for luminous display by driving said two sets of electrode groups.
Claim 2
Dependent Claim
117 words
A display device comprising: an envelope; at least two sets of electrode groups arranged in directions intersecting each other within said envelope, one of said electrode groups being stretched in a space within said envelope; said electrode group stretched in said space including a main electrode assembly wherein said main electrode is bifurcated and such that one of each of the auxiliary electrodes in the assembly is arranged so as to be in the gap of each of said main electrodes in the assembly; and a plurality of display sections defined at intersections between said two sets of electrode groups, said display sections being selectively driven for luminous display by driving said two sets of electrode groups.
Claim 3
Dependent Claim
151 words
A display device comprising: a vacuum envelope; at least two sets of electrode groups selected from the group consisting of an anode, cathode and a control electrode, said two sets of electrode groups being arranged in directions intersecting each other within said envelope and one of said electrode groups being stretched in a space within said envelope; said electrode group stretched in said space including a main electrode assembly and an auxiliary electrode assembly maintained at the same electrical potential wherein said auxiliary electrode assembly is placed adjacent to said main electrode assembly such that a one to one correspondence exists between the two assemblies and such that the resonant frequency of each of said assemblies is different; and a plurality of display sections defined at intersections between said two sets of electrode groups, said display sections being selectively driven for luminous display by driving said two sets of electrode groups.
Claim 4
Dependent Claim
151 words
A display device comprising: a vacuum envelope; at least two sets of electrode groups selected from the group consisting of an anode, cathode and a control electrode, said two sets of electrode groups being arranged in directions intersecting each other within said envelope and one of said electrode groups being stretched in a space within said envelope; said electrode group stretched in said space including a main electrode assembly and an auxiliary electrode assembly maintained at the same electrical potential wherein said auxiliary electrode assembly is placed adjacent to said main electrode assembly such that a one to one correspondence exists between the two assemblies and such that the resonant frequency of each of said assemblies is different; and a plurality of display sections defined at intersections between said two sets of electrode groups, said display sections being selectively driven for luminous display by driving said two sets of electrode groups.
Claim 5
Dependent Claim
23 words
The display device as defined in claim 2, wherein said two sets of electrode groups consist of an anode and a control electrode.
Claim 6
Dependent Claim
19 words
The display device as defined in claim 2, wherein said two sets of electrode groups consist of control electrodes.
Claim 7
Dependent Claim
23 words
The display device as defined in claim 2, wherein said electrode group stretched in said space within said envelope is a control electrode.
Claim 8
Dependent Claim
25 words
The display device as defined in claim 2, wherein said auxiliary electrode assembly is arranged above said main electrode assembly through a gap of microdistance.
Claim 9
Dependent Claim
25 words
The display device as defined in claim 2, wherein said auxiliary electrode assembly and said main electrode assembly are arranged in contact with each other.
Claim 10
Dependent Claim
30 words
The display device as defined in claim 2, wherein said auxiliary electrode assembly and said main electrode assembly are arranged horizontally on the same plane through a gap of microdistance.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |