Analog graphic display method and apparatus
Abstract
An apparatus and method for using an output device such as an LED to show the approximate analog level of a variable electrical signal wherein a modulating AC waveform is superimposed either on the signal or a reference voltage, both of which are then fed to a comparator which drives the output device. Said device flashes at a constant perceptible rate with a duty cycle which varies in response to variations in the level of the input signal. The human eye perceives these variations in duty cycle as analogous to variations in the level of the input signal.
- Inventors:
-
- P.O. Box 385, Beach Island, SC 29841
- Issue Date:
- Research Org.:
- E I DUPONT DE NEMOURS & CO INC
- OSTI Identifier:
- 867938
- Patent Number(s):
- 5039978
- Assignee:
- Kronberg, James W. (P.O. Box 385, Beach Island, SC 29841)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B60 - VEHICLES IN GENERAL B60Q - ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
G - PHYSICS G09 - EDUCATION G09F - DISPLAYING
- DOE Contract Number:
- AC09-76SR00001
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- analog; graphic; display; method; apparatus; output; device; led; approximate; level; variable; electrical; signal; modulating; waveform; superimposed; reference; voltage; fed; comparator; drives; flashes; constant; perceptible; rate; duty; cycle; varies; response; variations; input; human; eye; perceives; analogous; output device; electrical signal; input signal; duty cycle; reference voltage; variable electrical; human eye; /340/345/
Citation Formats
Kronberg, James W. Analog graphic display method and apparatus. United States: N. p., 1991.
Web.
Kronberg, James W. Analog graphic display method and apparatus. United States.
Kronberg, James W. Tue .
"Analog graphic display method and apparatus". United States. https://www.osti.gov/servlets/purl/867938.
@article{osti_867938,
title = {Analog graphic display method and apparatus},
author = {Kronberg, James W},
abstractNote = {An apparatus and method for using an output device such as an LED to show the approximate analog level of a variable electrical signal wherein a modulating AC waveform is superimposed either on the signal or a reference voltage, both of which are then fed to a comparator which drives the output device. Said device flashes at a constant perceptible rate with a duty cycle which varies in response to variations in the level of the input signal. The human eye perceives these variations in duty cycle as analogous to variations in the level of the input signal.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1991},
month = {Tue Jan 01 00:00:00 EST 1991}
}
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