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US3587083A
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Character generation and display system
Assignee: Xerox Corp
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Filing: 1967-09-28
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Granted: 1971-06-22
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Expires: 1987-09-28
Abstract
Abstract A character generation and display system for characters comprised of a series of connecting line segments of various slopes which are formed by deflection waveforms resulting from integrating over a uniform period of time pulse trains having different frequencies.
Inventors
- 👤 Matthew P Tubinis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:47
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/06; G09G1/08; G09G1/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
162 words
A character signal generating system for generating horizontal and vertical deflection signals which control an electron beam to trace any of a plurality of predetermined characters each of which is composed of segments having various slopes and lengths, said system comprising: a. a horizontal integrator; b. a vertical integrator; c. a plurality of pulse generating means for generating a plurality of pulse trains each having a different frequency, each of said pulse generating means including a pulse train splitting circuit means for splitting each of said pulse trains into a pair of split pulse trains of like frequency to each other but of opposite polarity with each other; d. gating means for selectively gating in response to gate pulses any one of said split pulse trains to said integrators; and, e. means for generating in response to a code signal representative of one of said predetermined characters any one of a plurality of predetermined sequences of gate pulses to said gating means.
Claim 2
Dependent Claim
162 words
A character signal generating system for generating horizontal and vertical deflection signals which control an electron beam to trace any of a plurality of predetermined characters each of which is composed of segments having various slopes and lengths, said system comprising: a. a horizontal integrator; b. a vertical integrator; c. a plurality of pulse generating means for generating a plurality of pulse trains each having a different frequency, each of said pulse generating means including a pulse train splitting circuit means for splitting each of said pulse trains into a pair of split pulse trains of like frequency to each other but of opposite polarity with each other; d. gating means for selectively gating in response to gate pulses any one of said split pulse trains to said integrators; and, e. means for generating in response to a code signal representative of one of said predetermined characters any one of a plurality of predetermined sequences of gate pulses to said gating means.
Claim 3
Dependent Claim
17 words
A system as defined in claim 1 wherein said gate pulses having substantially the same pulse width.
Claim 4
Independent Claim
152 words
A system for generating predetermined characters composed of a plurality of successive straight line segments having various lengths and slopes in a display unit having signal integrating means for determining the slope and length of said segments comprising: a. a first plurality of conductors for signals representative of deflections in one direction; b. a second plurality of conductors for signals representative of deflections in another direction substantially perpendicular to said one direction; c. means coupled to each of said conductors of said first and second pluralities for generating on selected ones of said conductors successive pulse trains during substantially uniform time intervals indicative of segments of a particular character to be displayed, at least one of said successive pulse trains having a pulse repetition frequency different from that of another one of said pulse trains; and, d. means for coupling said first and second plurality of conductors to said signal integrating means.
Claim 5
Independent Claim
152 words
A system for generating predetermined characters composed of a plurality of successive straight line segments having various lengths and slopes in a display unit having signal integrating means for determining the slope and length of said segments comprising: a. a first plurality of conductors for signals representative of deflections in one direction; b. a second plurality of conductors for signals representative of deflections in another direction substantially perpendicular to said one direction; c. means coupled to each of said conductors of said first and second pluralities for generating on selected ones of said conductors successive pulse trains during substantially uniform time intervals indicative of segments of a particular character to be displayed, at least one of said successive pulse trains having a pulse repetition frequency different from that of another one of said pulse trains; and, d. means for coupling said first and second plurality of conductors to said signal integrating means.
Claim 6
Dependent Claim
29 words
A system as defined in claim 3 wherein at least one of said pulse trains has a polarity different from the polarity of another one of said pulse trains.
Claim 7
Dependent Claim
318 words
A character signal generating system for generating horizontal and vertical deflection signals which control an electron beam to trace any of a plurality of predetermined characters each of which is composed of segments having various slopes and lengths, said System comprising: a. horizontal means having an input for generating a horizontal analog signal as a function of the number of pulses received thereby; b. vertical means having an input for generating a vertical analog signal as a function of the number of pulses received thereby; c. a first conductor coupled to the input of said horizontal means; d. a second conductor coupled to the input of said vertical means; e. a first plurality of gates, each having two inputs and an output, said output being coupled to said first conductor; f. a second plurality of gates, each having two inputs and an output, said last recited output being coupled to said second conductor; g. a plurality of pulse splitting means for generating two substantially identical output pulse trains of opposite polarity on first and second outputs, respectively, in response to an input pulse train at the input thereof, said output pulse trains having a frequency dependent on frequency of said input pulse train; h. means for coupling said first output to the input of at least one of said gates in each of said pluralities of gates; i. means for coupling said second output to the input of at least one of said gates in each of said pluralities of said gates; j. a plurality of pulse train generators each having an output coupled individually to one of said pulse splitting means and each having a different operational frequency; and, k. means for selectively generating and applying any one of a plurality of predetermined sequences of gate pulses to the input of said gates of said first and second pluralities in accordance with one of said predetermined characters.
Claim 8
Dependent Claim
318 words
A character signal generating system for generating horizontal and vertical deflection signals which control an electron beam to trace any of a plurality of predetermined characters each of which is composed of segments having various slopes and lengths, said System comprising: a. horizontal means having an input for generating a horizontal analog signal as a function of the number of pulses received thereby; b. vertical means having an input for generating a vertical analog signal as a function of the number of pulses received thereby; c. a first conductor coupled to the input of said horizontal means; d. a second conductor coupled to the input of said vertical means; e. a first plurality of gates, each having two inputs and an output, said output being coupled to said first conductor; f. a second plurality of gates, each having two inputs and an output, said last recited output being coupled to said second conductor; g. a plurality of pulse splitting means for generating two substantially identical output pulse trains of opposite polarity on first and second outputs, respectively, in response to an input pulse train at the input thereof, said output pulse trains having a frequency dependent on frequency of said input pulse train; h. means for coupling said first output to the input of at least one of said gates in each of said pluralities of gates; i. means for coupling said second output to the input of at least one of said gates in each of said pluralities of said gates; j. a plurality of pulse train generators each having an output coupled individually to one of said pulse splitting means and each having a different operational frequency; and, k. means for selectively generating and applying any one of a plurality of predetermined sequences of gate pulses to the input of said gates of said first and second pluralities in accordance with one of said predetermined characters.
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 |