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Title: 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:
 [1]
  1. 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)
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 = {1991},
month = {1}
}

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