US4414490A
Expired / Lapsed
US
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Display panel
Assignee: Unisys Corp
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Filing: 1982-03-08
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Granted: 1983-11-08
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Expires: 2002-03-08
Abstract
Abstract A display panel and method of operating it wherein the panel includes columns of both scan cells and display cells which alternate with columns of only scan cells, and the columns of scan cells are scanned more rapidly than the columns of scan and display cells.
Inventors
- 👤 Edgar L. Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:10
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/492; H01J17/494
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
A display panel comprising a gas-filled envelope made up of a glass base plate and a glass viewing face plate, anode and cathode means forming a plurality of columns of gas cells, the first, third, fifth, seventh, etc. columns of gas cells including both scan cells which do not perform a display function and display cells which perform a display function, the second, fourth, sixth, eighth, etc. columns of cells including only scan cells which do not perform a display function.
Claim 2
Dependent Claim
81 words
A display panel comprising a gas-filled envelope made up of a glass base plate and a glass viewing face plate, anode and cathode means forming a plurality of columns of gas cells, the first, third, fifth, seventh, etc. columns of gas cells including both scan cells which do not perform a display function and display cells which perform a display function, the second, fourth, sixth, eighth, etc. columns of cells including only scan cells which do not perform a display function.
Claim 3
Dependent Claim
101 words
A display panel comprising a gas-filled envelope made up of a glass base plate and a glass viewing face plate, anode and cathode means forming a series of columns of cathode glow discharge gas cells, selected ones of the columns of gas cells including both scan cells which do not perform a display function and display cells which perform a display function, and between each two of said selected columns of cells there being a column of cells including only scan cells which do not perform a display function but facilitate the transfer of cathode glow along the columns of cells.
Claim 4
Dependent Claim
101 words
A display panel comprising a gas-filled envelope made up of a glass base plate and a glass viewing face plate, anode and cathode means forming a series of columns of cathode glow discharge gas cells, selected ones of the columns of gas cells including both scan cells which do not perform a display function and display cells which perform a display function, and between each two of said selected columns of cells there being a column of cells including only scan cells which do not perform a display function but facilitate the transfer of cathode glow along the columns of cells.
Claim 5
Dependent Claim
50 words
The panel defined in claim 2 and including means coupled to said anode and cathode means for applying scan and display signals to the columns of cells which include both scan cells and display cells, and applying only scan signals to said columns of cells which include only scan cells.
Claim 6
Dependent Claim
60 words
The panel defined in claim 2 and including means coupled to said anode and cathode means for applying scan and display signals for a first period of time to the columns of cells which include both scan cells and display cells, and applying signals for a second period of time to said columns of cells which include only scan cells.
Claim 7
Dependent Claim
61 words
The panel defined in claim 2 and including means coupled to said anode and cathode means for applying scan and display signals for a first period of time to the columns of cells which include both scan cells and display cells, and applying signals for a second shorter period of time to said columns of cells which include only scan cells.
Claim 8
Independent Claim
222 words
The method of operating a display panel which comprises a gas-filled envelope made up of a glass base plate and a glass viewing face plate, and anode and cathode means forming a series of columns of gas cells, selected ones of the columns of gas cells including both scan cells which do not perform a display function and display cells which perform a display function, and between each two of said selected columns of cells there being a column of cells including only scan cells which do not perform a display function but facilitate the transfer of cathode glow along the columns of cells, the method comprising the steps of first applying electrical signals to the first column of cells in the series of columns of cells to turn on all of the scan cells and selected ones of the associated display cells as dictated by the input information, second applying electrical signals to the next column of scan cells in the series of columns of cells, which is a column of only scan cells and turning on all of such scan cells, and repeating said first and second steps throughout said series of columns of cells and repeating said steps continually throughout said series of columns of cells to provide an apparently stationary but changeable message in the selected display cells.
Claim 9
Independent Claim
222 words
The method of operating a display panel which comprises a gas-filled envelope made up of a glass base plate and a glass viewing face plate, and anode and cathode means forming a series of columns of gas cells, selected ones of the columns of gas cells including both scan cells which do not perform a display function and display cells which perform a display function, and between each two of said selected columns of cells there being a column of cells including only scan cells which do not perform a display function but facilitate the transfer of cathode glow along the columns of cells, the method comprising the steps of first applying electrical signals to the first column of cells in the series of columns of cells to turn on all of the scan cells and selected ones of the associated display cells as dictated by the input information, second applying electrical signals to the next column of scan cells in the series of columns of cells, which is a column of only scan cells and turning on all of such scan cells, and repeating said first and second steps throughout said series of columns of cells and repeating said steps continually throughout said series of columns of cells to provide an apparently stationary but changeable message in the selected display cells.
Claim 10
Dependent Claim
18 words
The method defined in claim 6 wherein said second step is shorter in time than said first step.
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) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |