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US4967374A
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Character drawing method
Assignee: Sharp Corp
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Filing: 1988-07-25
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Granted: 1990-10-30
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Expires: 2008-07-25
Abstract
Abstract A character drawing method for use in a bit map display system in which after sentence data constituted by character code data have been converted into character pattern data, a bit string for forming characters is transferred to a memory for display corresponding to pixels so as to be displayed. In the character drawing method, drawing of the characters is performed through optimum distribution of functions of processings to be executed such that the processings are executed in parallel by a multiprocessor.
Inventors
- 👤 Akihiro Nomura
- 👤 Toshimi Kiyohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:10
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/36; G09G5/39; G09G5/393; G09G5/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
189 words
A method for distributing processor functions between multiple processors to create an efficient character drawing system, said method comprising the steps of: (a) entering character codes, corresponding to characters on a page of information, which are desired to be drawn, into a memory; (b) sequentially assigning display parameters to each of said character codes by a first processor means; (c) creating a display table by said first processor means sequentially entering each of said character codes and corresponding display parameters into said memory; (d) setting a flag to 1 for each of said character codes, upon entering of said character codes into said display table by said first processor means; (e) continually checking each of said display table flags with a second processor means; (f) writing each of said character codes and said corresponding display parameters into a character generator means upon said second processor means recognizing each of said display flag has been set to 1; (g) sequentially displaying each of said generated characters on a display means, thereby creating an efficient character drawing system wherein said first and second processor means sequentially perform character drawing operations continuously.
Claim 2
Independent Claim
189 words
A method for distributing processor functions between multiple processors to create an efficient character drawing system, said method comprising the steps of: (a) entering character codes, corresponding to characters on a page of information, which are desired to be drawn, into a memory; (b) sequentially assigning display parameters to each of said character codes by a first processor means; (c) creating a display table by said first processor means sequentially entering each of said character codes and corresponding display parameters into said memory; (d) setting a flag to 1 for each of said character codes, upon entering of said character codes into said display table by said first processor means; (e) continually checking each of said display table flags with a second processor means; (f) writing each of said character codes and said corresponding display parameters into a character generator means upon said second processor means recognizing each of said display flag has been set to 1; (g) sequentially displaying each of said generated characters on a display means, thereby creating an efficient character drawing system wherein said first and second processor means sequentially perform character drawing operations continuously.
Claim 3
Dependent Claim
15 words
A method, as claimed in claim 1, wherein said first processor means is a CPU.
Claim 4
Dependent Claim
16 words
A method, as claimed in claim 1, wherein said second processor means is a graphic processor.
Claim 5
Dependent Claim
88 words
A method, as claimed in claim 1, further comprising the steps of: (i) setting said flag to 2 for each of said character codes upon entering said entire page of information desired to be drawn, by said first processor means. (j) continually checking each of said display table flags by said second processor means for flags set to 2; and (k) displaying said entire page of information desired to be drawn subsequent to said second processor means recognizing that said display table flags have been set to 2.
Claim 6
Dependent Claim
252 words
A character drawing system in which processor functions are distributed between multiple processors to create an efficient character drawing system for creating drawings of characters, said system comprising: first storage means for storing entered character codes, corresponding to characters on a page of information, which are desired to be drawn; first processor means, connected to said first means for storing, for sequentially assigning display parameters to each of said stored codes, said first processor means thereby creating a display table by sequentially entering each of said character codes and corresponding display parameters into said first storage means; said first processor means further setting a flag to 1 for each of said character codes upon entering of said character codes into said display table; second processor means, operatively connected to said first storage means, for continually checking each of said display table flags; said second processor means sequentially transforming each of said character codes and said corresponding display parameters into a second storage means upon recognizing each of said display flags have been set to 1; second storage means for sequentially storing said written character codes and corresponding display parameters; character generating means, connected to said second storage means, for sequentially generating characters from said stored character codes and corresponding display parameters; display means, operatively connected to said character generating means, for sequentially displaying each of said generating characters on said display means, thereby creating an efficient character drawing system wherein said first and second processor means sequentially perform character drawing operations continuously.
Claim 7
Dependent Claim
252 words
A character drawing system in which processor functions are distributed between multiple processors to create an efficient character drawing system for creating drawings of characters, said system comprising: first storage means for storing entered character codes, corresponding to characters on a page of information, which are desired to be drawn; first processor means, connected to said first means for storing, for sequentially assigning display parameters to each of said stored codes, said first processor means thereby creating a display table by sequentially entering each of said character codes and corresponding display parameters into said first storage means; said first processor means further setting a flag to 1 for each of said character codes upon entering of said character codes into said display table; second processor means, operatively connected to said first storage means, for continually checking each of said display table flags; said second processor means sequentially transforming each of said character codes and said corresponding display parameters into a second storage means upon recognizing each of said display flags have been set to 1; second storage means for sequentially storing said written character codes and corresponding display parameters; character generating means, connected to said second storage means, for sequentially generating characters from said stored character codes and corresponding display parameters; display means, operatively connected to said character generating means, for sequentially displaying each of said generating characters on said display means, thereby creating an efficient character drawing system wherein said first and second processor means sequentially perform character drawing operations continuously.
Claim 8
Dependent Claim
15 words
A system, as claimed in claim 5, wherein said first processor means is a CPU.
Claim 9
Dependent Claim
16 words
A system, as claimed in claim 5, wherein said second processor means is a graphic processor.
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) | 1993-10-29 | 1994-04-30 | 1994-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-29 | 1998-04-30 | 1998-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-29 | 2002-04-30 | 2002-10-30 | $7700.00 | Window Closed / Lapsed |