US3902476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning display for sampled data
Assignee: Technicare Corp
•
Filing: 1974-04-02
•
Granted: 1975-09-02
•
Expires: 1994-04-02
Abstract
Abstract A system for displaying sampled continuous input signals on an x-y scanning CRT display with dual sampling circuitry responsive to the highest and lowest amplitude of the input signal over sampling periods corresponding to x-sweep periods of the display. The sampled peaks are compared to the x-sweep signal to generate a variable length pulse to modulate the scanning beam intensity. The length of the pulse depends on the spread between the sampled peaks. Sampled data can be displayed in this manner simultaneously with conventional ultrasonic ''''motion displays.
Inventors
- 👤 Ronald E Hileman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:27
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/08; G; G01; G01S; G01S7/00; G01S7/52; G01S7/52017; G01S7/52053; G01S7/52057
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
138 words
A system for generating a scanning display of sampled data, comprising means for repetitively generating an x-sweep signal having a ramp-like waveform indicative of progressive displacement in one direction in said display, means for detecting the highest and lowest relative levels of an input signal in each of consecutive sampling periods corresponding respectively to repetitions of said x-sweep signal, means for initiating a variable length control pulse when the x-sweep attains a level corresponding to the lowest level detected in said input signal in a corresponding sampling period, means for terminating said control pulse when said x-sweep signal attains the level of the highest level of the input signal detected in said corresponding sampling period, and means responsive to said control pulse for generating a line of variable length in said one direction corresponding to said control pulse.
Claim 2
Independent Claim
138 words
A system for generating a scanning display of sampled data, comprising means for repetitively generating an x-sweep signal having a ramp-like waveform indicative of progressive displacement in one direction in said display, means for detecting the highest and lowest relative levels of an input signal in each of consecutive sampling periods corresponding respectively to repetitions of said x-sweep signal, means for initiating a variable length control pulse when the x-sweep attains a level corresponding to the lowest level detected in said input signal in a corresponding sampling period, means for terminating said control pulse when said x-sweep signal attains the level of the highest level of the input signal detected in said corresponding sampling period, and means responsive to said control pulse for generating a line of variable length in said one direction corresponding to said control pulse.
Claim 3
Dependent Claim
102 words
The system of claim 1, wherein, said means for initiating said variable length pulse includes a first sample and hold circuit means for sampling at the end of said sampling period the output of said detecting means representing the lowest level attained by said input signal during said sampling period, first comparator means operatively comparing said x-sweep signal to the output of said first sample and hold circuit, and a variable length pulse generator means responsive to the output of said first comparator means indicating coincidence of said x-sweep and first sample and hold circuit means output levels for initiating a pulse.
Claim 4
Dependent Claim
106 words
The system of claim 2 wherein said means for terminating said pulse includes a second sample and hold circuit means for sampling at the end of a sampling period the output of said detecting means representing the highest level attained by said input signal during said sampling period, and second comparator means operatively receiving the x-sweep signal indicating coincidence thereof with the output of said second sample and hold circuIt means, said pulse generator means being responsive to the output of said second comparator means for terminating said pulse when the levels of said x-sweep signal and said second sample and hold circuit means output correspond.
Claim 5
Dependent Claim
49 words
The system of claim 3, wherein said means for terminating said pulse includes means for slightly offsetting said x-sweep input to said second comparator means relative to the input of said first comparator means such that constant level input signals will result in a control pulse of fixed length.
Claim 6
Dependent Claim
170 words
A scanning display for sampled data, comprising a CRT unit including means for generating an electron beam of modulated intensity in accordance with a z-input and means for deflecting said beam in the orthogonal x and the y directions in accordance with x-sweep and y-sweep signals, means for generating said x-sweep signal in the form of a repetitive ramp-like waveform, each repetition of said x-sweep signal defining a sampling period, a pair of peak detector means for registering respectively the highest and lowest relative levels of an input signal during a given sampling period, first gate means for generating a start signal when said x-sweep signal attains a level which corresponds to the output of one of the peak detectors, second gate means for generating a stop signal when said x-sweep signal attains a level which corresponds to the output of said other peak detector, and variable length pulse generator means responsive to said start and stop signals respectively for initiating and terminating a control pulse output to said z-input.
Claim 7
Dependent Claim
170 words
A scanning display for sampled data, comprising a CRT unit including means for generating an electron beam of modulated intensity in accordance with a z-input and means for deflecting said beam in the orthogonal x and the y directions in accordance with x-sweep and y-sweep signals, means for generating said x-sweep signal in the form of a repetitive ramp-like waveform, each repetition of said x-sweep signal defining a sampling period, a pair of peak detector means for registering respectively the highest and lowest relative levels of an input signal during a given sampling period, first gate means for generating a start signal when said x-sweep signal attains a level which corresponds to the output of one of the peak detectors, second gate means for generating a stop signal when said x-sweep signal attains a level which corresponds to the output of said other peak detector, and variable length pulse generator means responsive to said start and stop signals respectively for initiating and terminating a control pulse output to said z-input.
Claim 8
Dependent Claim
37 words
The display of claim 5, further comprising transducer means for transmitting a pulse signal synchronized with said x-sweep signal and for producing an output to said z-input indicative of received reflected portions of said transmitted pulse signal.
Claim 9
Dependent Claim
30 words
The display of claim 6, further comprising analog pick-up means for furnishing a continuous electrical signal representative of a physiological parameter as said input signal to said peak detector means.
Claim 10
Dependent Claim
12 words
The display of claim 6, wherein said transducer is an ultrasonic transducer.
Claim 11
Dependent Claim
16 words
The display of claim 8, further comprising a heart sound pick-up means furnishing said input signal.
Claim 12
Independent Claim
92 words
A system for displaying a continuously varying waveform, comprising sampling means for dividing said waveform into sampling periods and detecting the maximum and minimum of said waveform during each of said sampling periods, and graphical display means responsive to the peaks and amplitudes detected by said sampling means for generating a visual indication for each sampling period having a length corresponding to the difference between the maximum and the minimum detected by said sampling means for such sampling period and having a position corresponding to the values of such maximum and minimum.
Claim 13
Independent Claim
92 words
A system for displaying a continuously varying waveform, comprising sampling means for dividing said waveform into sampling periods and detecting the maximum and minimum of said waveform during each of said sampling periods, and graphical display means responsive to the peaks and amplitudes detected by said sampling means for generating a visual indication for each sampling period having a length corresponding to the difference between the maximum and the minimum detected by said sampling means for such sampling period and having a position corresponding to the values of such maximum and minimum.
Claim 14
Independent Claim
86 words
A method of displaying diagnostic data, comprising the steps of detecting and transducing a continuous time-varying parameter to provide an electrical signal representing the value of said parameter, detecting the maximum and minimum value of said electrical signal during each one of consecutive sampling periods, and generating a visual indication for each sampling period having a length corresponding to the difference between the maximum and the minimum detected for a corresponding sampling period and having a position corresponding to the values of said maximum and minimum.
Claim 15
Independent Claim
86 words
A method of displaying diagnostic data, comprising the steps of detecting and transducing a continuous time-varying parameter to provide an electrical signal representing the value of said parameter, detecting the maximum and minimum value of said electrical signal during each one of consecutive sampling periods, and generating a visual indication for each sampling period having a length corresponding to the difference between the maximum and the minimum detected for a corresponding sampling period and having a position corresponding to the values of said maximum and minimum.
Claim 16
Dependent Claim
12 words
The method of claim 11, wherein said parameter is a physiological parameter.
Claim 17
Dependent Claim
11 words
The method of claim 11, wherein said parameter is heart sound.
Claim 18
Dependent Claim
67 words
The method of claim 11, further comprising the steps of transmitting a pulse at the start of each sampling period, subsequently receiving within each corresponding sampling period a reflected portion of said transmitted pulse, and generating another visual indication for each sampling period having a position corresponding to the elapsed time from the start Of each sampling period to receipt of said reflected portion of said pulse.
Claim 19
Dependent Claim
19 words
The method of claim 14, wherein said pulse is an ultrasonic pulse and said parameter is a physiological parameter.
Claim 20
Dependent Claim
11 words
The method of claim 15, wherein said parameter is heart sound.
References Cited (Backward Citations)
US3334622A
Cited
US3624744A
Cited
US3680076A
Cited
US3686662A
Cited
US3744479A
Cited
US3812491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |