US3696394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and arrangement for generating tracing signals
Assignee: Casio Computer Co Ltd
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Filing: 1969-12-04
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Granted: 1972-10-03
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Expires: 1989-12-04
Abstract
Abstract Tracing signals are applied to control the vertical and horizontal deflecting electrodes for a display or recording device to reproduce two-dimentional characters or indicia. In order to generate such tracing signals, the arrangement is provided with a memory which stores the programs which comprise two kinds of information, one being for setting the counters and the other being for counting input pulses up or down by the counters connected to the memory. The stepwise output of each of the counters is converted by the digital-to-analog converters into analog quantities to generate tracing or control voltages to be applied to the deflecting electrodes of the display or recording device.
Inventors
- 👤 Toshio Kashio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:23
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/06; G09G1/08; G09G1/10; G07; G07C; G07C9/00; G07C9/20; G07C9/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
193 words
In apparatus for composing characters in accordance with X and Y coordinates tracing signals, the combination comprising X and Y up-down pulse counters, pulse generating means connected to said counters for generating pulses of predetermined repetition rate to be counted by said counters, digital-to-analog converter means connected to said counters for converting digital outputs of said counters to analog X and Y tracing signals, and counter control means for causing said counters to set initially and to count up or count down by discrete increments or decrements in response to said pulses, or not to count, in accordance with successive portions of characters to be composed, the counter control means comprising memory means for providing control signals for controlling the initial setting of said counters and the up or down counting of said counters, selection means connected to said memory means for selecting control signals to be supplied to said counters in accordance with a selected character to be composed, and timing means connected to said memory means for causing the selected control signals to be supplied to said counters during successive intervals corresponding to portions of the selected character to be composed.
Claim 2
Dependent Claim
193 words
In apparatus for composing characters in accordance with X and Y coordinates tracing signals, the combination comprising X and Y up-down pulse counters, pulse generating means connected to said counters for generating pulses of predetermined repetition rate to be counted by said counters, digital-to-analog converter means connected to said counters for converting digital outputs of said counters to analog X and Y tracing signals, and counter control means for causing said counters to set initially and to count up or count down by discrete increments or decrements in response to said pulses, or not to count, in accordance with successive portions of characters to be composed, the counter control means comprising memory means for providing control signals for controlling the initial setting of said counters and the up or down counting of said counters, selection means connected to said memory means for selecting control signals to be supplied to said counters in accordance with a selected character to be composed, and timing means connected to said memory means for causing the selected control signals to be supplied to said counters during successive intervals corresponding to portions of the selected character to be composed.
Claim 3
Dependent Claim
40 words
Apparatus in accordance with claim 1, wherein said timing means comprises means connected to said pulse generating means for applying control signal read-out pulses to said memory means at a rate which is a fraction of the said repetition rate.
Claim 4
Dependent Claim
23 words
Apparatus in accordance with claim 1, said apparatus comprising X and Y trace deflecting electrodes to which the corresponding tracing signals are applied.
Claim 5
Dependent Claim
39 words
Apparatus in accordance with claim 1, wherein said memory means comprises a matrix having two sets of input terminals, one of which is connected to said selection means and the other of which is connected to said timing means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |