Analog graphic display method and apparatus

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:867938

Kronberg, James W ^[1]

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1. P.O. Box 385, Beach Island, SC 29841

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.

• Research Organization: E I DUPONT DE NEMOURS & CO INC
• DOE Contract Number: AC09-76SR00001
• Assignee: Kronberg, James W. (P.O. Box 385, Beach Island, SC 29841)
• Patent Number(s): US 5039978
• OSTI ID: 867938
• Country of Publication: United States
• Language: English

Related Subjects

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
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