US3587085A
Expired / Lapsed
US
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Character display system
Assignee: Bunker Ramo Corp
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Filing: 1968-11-04
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Granted: 1971-06-22
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Expires: 1988-11-04
Abstract
Abstract A system for displaying characters on a plurality of display devices each of which is of a type which requires its display to be refreshed at a predetermined rate. Information to be displayed is stored in a memory means in a first code and is cyclically applied by said memory means to a character generator which generates corresponding characters in a second display code. Characters to be displayed in a given display position on each of the display devices are sequentially applied to the character generator with the output from the character generator being applied to control the display of at least a portion of the character applied to its input on the appropriate display device.
Inventors
- 👤 William Daniel Baxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:10
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/14; G06F3/153; G09; G09G; G09G1/00; G09G1/06; G09G1/14; G09G1/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
A character display system comprising: a plurality of display devices, each of said display devices having a corresponding plurality of character display positions and being of a type which requires its display to be refreshed at a predetermined rate; memory means adapted to store in a first code the information to be displayed on each of said display devices; a character generator adapted to receive character information in said first code and to generate corresponding character information in a second display code; first means for cyclically applying the characters stored in said memory means to said character generator, with the characters which are to be displayed in the corresponding display position of each of the display devices being sequentially applied to said character generator; and second means for applying the output from said character generator to control the display of at least a portion of the character applied to its input on the appropriate display device.
Claim 2
Dependent Claim
156 words
A character display system comprising: a plurality of display devices, each of said display devices having a corresponding plurality of character display positions and being of a type which requires its display to be refreshed at a predetermined rate; memory means adapted to store in a first code the information to be displayed on each of said display devices; a character generator adapted to receive character information in said first code and to generate corresponding character information in a second display code; first means for cyclically applying the characters stored in said memory means to said character generator, with the characters which are to be displayed in the corresponding display position of each of the display devices being sequentially applied to said character generator; and second means for applying the output from said character generator to control the display of at least a portion of the character applied to its input on the appropriate display device.
Claim 3
Dependent Claim
75 words
A system of the type described in claim 1 wherein, each time the character generator has an input applied to it, its output is utilized to control the display of a 1/N portion of the character; and wherein said first means is operative to sequentially apply the characters for a given display position to said character generator a total of N times before applying a character for any other display position to said character generator.
Claim 4
Dependent Claim
37 words
A system of the type described in claim 2 including means operative each time a character is applied to the character generator for selecting the proper 1/N portion of the character generator output to control the display.
Claim 5
Dependent Claim
54 words
A system of the type described in claim 1 wherein, each time a character is applied to the character generator, its output is utilized to control the display of at least two bits of the character; and including means associated with each of said display devices for storing the character generator outputs applied thereto.
Claim 6
Dependent Claim
75 words
A system of the type described in claim 1 including means for indicating the display device for which the character applied to said character generator is intended; and wherein said first means for directing a character for the indicated display device from said memory means to said character generator; and wherein said second means includes switching means responsive to said indicating means for directing the output from said character generator to the indicated display device.
Claim 7
Dependent Claim
70 words
A system of the type described in claim 1 wherein the number of display devices served by a character generator of a given speed, and the portion of the character which has its display controlled each time a character is applied to the character generator are selected so as to maximize the number of display devices serviced while still refreshing at a fast enough rate to provide a flicker-free display.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |