Patent US3659282A successfully refreshed from Google Patents.
US3659282A
Expired / Lapsed
US
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Graphic display
Assignee: Iwatsu Electric Co Ltd
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Filing: 1968-12-11
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Granted: 1972-04-25
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Expires: 1988-12-11
Abstract
Abstract A pair of input signals corresponding to X and Y coordinate information are processed and simultaneously applied at certain time intervals to a display system, and the points represented by said pair of input signals are successively connected by straight lines. In a first embodiment of the signal processing, wherein the input signals and digital signals, such input signals are applied to a first digital analog converter for converting the digital signals into related quantum analog voltages whereupon the quantum voltages are applied to a second digital analog converter which effectively adds the quantum voltages. The output of the second converter is impressed upon a CRT display of the oscilloscope or an XY recorder, thereby tracing a figure on the display or recorder. Alternatively, the first digital analog converter can be replaced by an analog attenuator for converting analog input signals into related analog quantum voltages which are then processed the same as in the above-mentioned first embodiment. Thus, very accurate coordinate presentations can be traced on a CRT display of the oscilloscope or an XY recorder.
Inventors
- 👤 Yasuo Tada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:28
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/06; G09G1/08; G09G1/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
168 words
An improved method for providing a graphic display on an electrical display device by processing coordinate input information signals, corresponding to a line to be displayed, to obtain a output signal for application to said display device, comprising the steps of converting coordinate input information signals into first quantum voltages which are functions of said information signals, applying said quantum voltages to a first reference voltage input of a first digital analog converter, applying a series of clock pulses to an input to a digital counter for producing a series of digital pulses at an output of said counter, applying said output digital pulses to a second input of said digital analog converter, processing each of said quantum voltages by said series of output digital pulses within said digital analog converter to produce a varying quantum output signal for each said first quantum signal at an output of said digital analog converter, and coupling said quantum output signal to said electrical display device to produce said graphic display.
Claim 2
Dependent Claim
168 words
An improved method for providing a graphic display on an electrical display device by processing coordinate input information signals, corresponding to a line to be displayed, to obtain a output signal for application to said display device, comprising the steps of converting coordinate input information signals into first quantum voltages which are functions of said information signals, applying said quantum voltages to a first reference voltage input of a first digital analog converter, applying a series of clock pulses to an input to a digital counter for producing a series of digital pulses at an output of said counter, applying said output digital pulses to a second input of said digital analog converter, processing each of said quantum voltages by said series of output digital pulses within said digital analog converter to produce a varying quantum output signal for each said first quantum signal at an output of said digital analog converter, and coupling said quantum output signal to said electrical display device to produce said graphic display.
Claim 3
Dependent Claim
68 words
An improved method for providing a graphic display on an electrical display device as set forth in claim 1, further comprising the step of filtering said quantum output signal coupled to said display device by coupling a low pass filter between said first digital analog converter output and said graphic display device, and passing said quantum output signal coupled to said display device through said low pass filter.
Claim 4
Dependent Claim
92 words
An improved method for providing a graphic display on an electrical display device as set forth in claim 1, wherein said coordinate input information signals comprise digital coordinate signals, and wherein said step of converting said coordinate input information signals into quantum voltages is performed by applying said digital coordinate signals to a First input to a second digital analog converter and applying a reference voltage to a second reference voltage input of said second digital analog converter to produce said first quantum voltages which are functions of said digital coordinate signals.
Claim 5
Dependent Claim
68 words
An improved method for providing a graphic display on an electrical display device as set forth in claim 3, further comprising the step of filtering said quantum output signal coupled to said display device by coupling a low pass filter between said first digital analog converter output and said graphic display device, and passing said quantum output signal coupled to said display device through said low pass filter.
Claim 6
Dependent Claim
57 words
An improved method for providing a graphic display on an electrical display device as set forth in claim 4, further comprising the step of attenuating the filtered quantum output signal by coupling an attenuator between said filter and display device, and passing said filtered quantum output signal coupled to said display device through said low pass filter.
Claim 7
Dependent Claim
149 words
An improved method for providing a graphic dis-play on an electrical display device as set forth in claim 4, further comprising the steps of passing said digital coordinate signals through an accumulator and register circuit to said second digital analog converter to store each said signal within said register for producing difference digital coordinate signals determined by each digital coordinate signal and its preceding said signal stored in said accumulator, applying said difference digital coordinate signals to said first input to said second digital analog converter, coupling register-output signals from an output of said register to an input of a third digital analog converter, and coupling an output of said third digital analog converter and said output of said first converter through an operational amplifier to said display device to add said preceding digital coordinate signal from said register to said output of said first digital analog converter output.
Claim 8
Dependent Claim
68 words
An improved method for providing a graphic display on an electrical display device as set forth in claim 6, further comprising the step of filtering said quantum output signal coupled to said display device by coupling a low pass filter between an output of said operational amplifier and said graphic display device, and passing said quantum output signal coupled to said display device through said low pass filter.
Claim 9
Dependent Claim
59 words
An improved method for providing a graphic display on an electrical display device as set forth in claim 7, further comprising the step of attenuating the filtered quantum output signal by coupling an attenuator between an output of said filter and said display device, and passing said filtered quantum output signal coupled to said display device through said attenuator.
Claim 10
Dependent Claim
66 words
An improved method for providing a graphic display on an electrical display device as set forth in claim 1, wherein said coordinate input information signals comprise analog coordinate signals, and wherein said step of converting said coordinate information signals into quantum voltages is performed by applying said analog coordinate signals to a first attenuator to produce said first quantum voltages proportional to said analog coordinate signals.
Claim 11
Dependent Claim
68 words
An improved method for providing a graphic display on an electrical display device as set forth in claim 9, further comprising the step of filtering said quantum output signal coupled to said display device by coupling a low pass filter between said first digital analog converter output and said graphic display device, and passing said quantum output signal coupled to said display device through said low pass filter.
Claim 12
Dependent Claim
60 words
An improved method for providing a graphic display on an electrical display device as set forth in claim 10, further comprising the step of attenuating the filtered quantum output signal by coupling a second attenuator between an output of said filter and said display device, and passing said filtered quantum output signal coupled to said display device through said attenuators.
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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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |