US4499460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
ROS Control of gas panel
Assignee: International Business Machines Corp
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Filing: 1982-06-09
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Granted: 1985-02-12
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Expires: 2002-06-09
Abstract
Abstract Operation of an AC plasma display panel requires the three control operations of write, erase, and sustain. Sustain, write and erase signals are stored in a plurality of sections in a storage device and the sections are selectively accessed according to the specific operation to be provided to the plasma panel display. Switching between the sections in the storage device is accomplished without signal discontinuity in the sustain, write, and erase signals used to drive the illuminable cells. The sustain operation is recycled during those periods when no write or erase operation is being done.
Inventors
- 👤 Kenneth A. Pearson
- 👤 Larry R. Zucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:07
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G3/288; G09G3/298
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
159 words
A system for applying sustain, write and erase signal sequences to control the discharge state of a plurality of cells in a plasma display device comprising: a storage device having a plurality of sections in which said sustain, write and erase signal sequences are stored; means for generating erase and write command signals; means for detecting the presence of said erase and write command signals; means for reading said signal sequences from said storage device in response to said erase and write command signals, said erase command signal initiating the reading of said erase signal sequence, said write command signal initiating the reading of said write signal sequence, and the absence of said erase and write command signals initiating the reading of said sustain signal sequence; and means for applying said signal sequences to said plasma display device, whereby the discharge state of said plasma display device can be periodically changed in response to write and erase command signals.
Claim 2
Independent Claim
159 words
A system for applying sustain, write and erase signal sequences to control the discharge state of a plurality of cells in a plasma display device comprising: a storage device having a plurality of sections in which said sustain, write and erase signal sequences are stored; means for generating erase and write command signals; means for detecting the presence of said erase and write command signals; means for reading said signal sequences from said storage device in response to said erase and write command signals, said erase command signal initiating the reading of said erase signal sequence, said write command signal initiating the reading of said write signal sequence, and the absence of said erase and write command signals initiating the reading of said sustain signal sequence; and means for applying said signal sequences to said plasma display device, whereby the discharge state of said plasma display device can be periodically changed in response to write and erase command signals.
Claim 3
Dependent Claim
16 words
A system as recited in claim 1, wherein said storage device comprises a Read Only Storage.
Claim 4
Dependent Claim
28 words
A system as recited in claim 1, wherein said storage device includes bridging signal sequences for bridging between said sustain, write, and erase signal sequences without signal discontinuities.
Claim 5
Dependent Claim
35 words
A system as recited in claim 1, further comprising means for generating a power-on reset command signal wherein said power-on reset command signal initiates the reading of said sustain signal sequence from said storage device.
References Cited (Backward Citations)
US4099096A
Cited
US3973253A
Cited
US3851211A
Cited
US3894506A
Cited
GB2101178A
Cited
GB2102179A
Cited
US4415892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |