US3601532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasma display panel apparatus having variable-intensity display
Assignee: University of Illinois at Urbana-Champaign
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Filing: 1968-10-08
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Granted: 1971-08-24
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Expires: 1988-10-08
Abstract
Abstract Plasma display panel apparatus having a variable-intensity display for displaying periodically changing information, such as television video signals, the display panel apparatus including means for decoding the information signal of varying intensity levels into respective voltage levels corresponding to the respective cells in a display of the plasma display panel, means for entering the respective voltage levels into corresponding cells such that the initial wall voltage of each cell corresponds to the incoming information signal intensity level to be displayed at the respective cells forming the plasma display panel; and means for discharging the cells in accordance with the initial wall voltage, such that a variable-intensity display is obtained.
Inventors
- 👤 Donald L Bitzer
- 👤 Hiram Gene Slottow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:29
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/125
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
210 words
In gaseous pulsing dischArge display panel apparatus, including a gaseous medium in said panel, and display points defined by associated paired electrodes arranged in a grid of crossing paired row and column electrodes, said display points including gaseous discharge cells having cell walls for forming wall charges thereon, wherein information is transferred into and out of said panel by manipulating wall charges associated with the selective pulsing discharge of the gaseous medium at the display points by coupling suitable exciting signals to the associated paired electrodes, the combination further including means for sequentially displaying video signal information line by line, each line associated with a respective row, from one row end to the other row end of the panel, said means comprising: decoding means for decoding said video signal information into respective voltage levels corresponding to associated display points in a line; wall-charge-setting means for entering said respective voltage levels into said corresponding display points such that the respective wall charges at each display point corresponds to said incoming video signal level; and sequential discharge means for sequentially discharging said gaseous medium at the display points line by line in response to the associated wall charges entered at each display point to obtain a variable-intensity display of said video information.
Claim 2
Dependent Claim
210 words
In gaseous pulsing dischArge display panel apparatus, including a gaseous medium in said panel, and display points defined by associated paired electrodes arranged in a grid of crossing paired row and column electrodes, said display points including gaseous discharge cells having cell walls for forming wall charges thereon, wherein information is transferred into and out of said panel by manipulating wall charges associated with the selective pulsing discharge of the gaseous medium at the display points by coupling suitable exciting signals to the associated paired electrodes, the combination further including means for sequentially displaying video signal information line by line, each line associated with a respective row, from one row end to the other row end of the panel, said means comprising: decoding means for decoding said video signal information into respective voltage levels corresponding to associated display points in a line; wall-charge-setting means for entering said respective voltage levels into said corresponding display points such that the respective wall charges at each display point corresponds to said incoming video signal level; and sequential discharge means for sequentially discharging said gaseous medium at the display points line by line in response to the associated wall charges entered at each display point to obtain a variable-intensity display of said video information.
Claim 3
Dependent Claim
35 words
Display panel apparatus as claimed in claim 1, wherein said sequential discharge means includes means for discharging the display points as a function of the respective amount of wall charge entered at each display point.
Claim 4
Dependent Claim
76 words
Display panel apparatus as claimed in claim 2, wherein the gaseous medium at the display points having the highest amount of wall charge are discharged first and repetitively discharged more times than the gaseous medium at display points having the lowest amount of wall charge which are discharged last within a prescribed display period, the relative amount of repetitive discharging of said gaseous medium at the display points within the display period providing a variable-intensity display.
Claim 5
Dependent Claim
19 words
Display panel apparatus as claimed in claim 3, wherein said sequential discharging means includes an increasing amplitude sustaining signal.
Claim 6
Dependent Claim
52 words
Display panel apparatus as claimed in claim 1, wherein said decoding means comprises sample and hold means for sampling the video information at a rate commensurate with the entering of said information line by line into said panel, and providing a discrete voltage level corresponding to the sampled level of video information.
Claim 7
Dependent Claim
43 words
Display panel apparatus as claimed in claim 5, wherein said wall-charge-setting means comprises means for transforming said sampled voltage level from said decoding means into corresponding sloped signals, the amount of said slope of each signal being proportional to the sampled voltage level.
Claim 8
Dependent Claim
96 words
Display panel apparatus as claimed in claim 1, including: a second grid of crossing row and column electrodes; said first grid associated with display field (A), and said second grid associated with display field (B); the combination of said display fields (A) and (B) forming a complete display frame; said wall-charge-setting means entering the respective voltage levels associated with the video information of display field (A) into one of said grids; and said sequential discharge means sequentially discharging the gaseous medium at the display points associated with display field (B) in the other of said grids.
Claim 9
Dependent Claim
48 words
Display panel apparatus as claimed in claim 7, wherein the video information is entered into display field (A) simultaneously with the displaying of display field (B), and thereafter the video information is entered into field (B) while the previously entered video information in display field (A) is displayed.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |